CN116123767A - Universal pneumatic control valve for refrigerant medium, high-precision automatic filling valve group and automatic filling equipment - Google Patents

Abstract

The invention provides a universal pneumatic control valve for a refrigerant medium, a high-precision automatic filling valve group and automatic filling equipment, which are reasonable in structural design, convenient to assemble and disassemble, stable in operation, safe, reliable, accurate in metering precision, and suitable for automatic filling of non-repeated filling refrigerant steel cylinders with various specifications.

Description

A general-purpose pneumatic control valve for cold medium, high-precision automatic filling valve group and automatic filling equipment

technical field

The invention relates to the technical field of refrigerant automatic filling and control valves, in particular to a general pneumatic control valve for refrigerant media, a high-precision automatic filling valve group and automatic filling equipment.

Background technique

At present, with the rapid development of my country's refrigeration industry, the amount of refrigerant used is also increasing. However, due to the many types and specifications of non-refillable refrigerant steel cylinders on the existing market and low processing accuracy, the refrigerant filling is still mainly manual or semi-automatic filling, which is labor-intensive and low in efficiency. The accuracy is unstable, and automatic filling production cannot be realized.

Contents of the invention

The purpose of the present invention is to provide a universal pneumatic control valve for cold medium medium, high-precision automatic filling valve group and automatic filling equipment with reasonable structure design, convenient disassembly and assembly, convenient operation, high efficiency and stability, accurate measurement accuracy, safety and reliability.

In order to achieve the above object, the present invention is achieved through the following technical solutions:

A general-purpose pneumatic control valve for refrigerant medium, comprising a refrigerant valve body, a control valve body, and a sealing assembly between the refrigerant valve body and the control valve body, a valve stem sequentially runs through the refrigerant valve body, the sealing assembly, and the control valve body, the The front port of the refrigerant valve body is pierced with the refrigerant inlet spool. The valve stem part of the refrigerant valve body and the end sleeved valve disc assembly can be opened and closed to connect with the refrigerant inlet spool. A refrigerant outlet pipe joint is provided on one side of the refrigerant valve body , the other side is provided with a plug; the end of the valve rod in the control valve body is sleeved with the control valve piston, and the rear port of the control valve body is connected to the bonnet, and the bonnet can be movably connected to the bonnet adjustment cap, and the bonnet adjustment cap The stroke adjustment screw can be movably connected, and the stroke adjustment screw is covered with a pressure adjustment spring. The control valve piston drives the valve rod and the stroke adjustment screw can be opened and closed.

Further, it includes a valve seat, a refrigerant filling pipe, a vacuum valve, a rough refrigerant addition valve, a fine refrigerant addition valve, a pressure sensor, and a refrigerant recovery valve. The refrigerant filling pipe is connected to the valve seat, and the valve seat is rotatable The five-way valve seat, the vacuum valve, the refrigerant rough addition valve, the refrigerant fine addition valve, and the refrigerant recovery valve are respectively connected to the valve seat and controlled by a remote PLC controller through a two-position three-way solenoid valve. The pressure sensor and Remote PLC controller communication connection, the other end of the vacuum valve is connected to the vacuum pump, the other ends of the refrigerant rough addition valve and the refrigerant fine addition valve are respectively connected to the refrigerant material main pipe through a four-way pipe joint and are respectively connected to a compressed air source. The refrigerant recovery valve is connected to the four-way pipe joint and the refrigerant material main pipe through the regulation between the recovery booster cylinder and the two-position five-way solenoid valve;

Both the rough refrigerant addition valve and the refrigerant fine addition valve adopt the general pneumatic control valve of claim 1.

Further, it includes a weighing system arranged from bottom to top on one side of the table, a sliding base mechanism, a steel cylinder filling positioning mechanism, a steel cylinder filling nozzle fine positioning mechanism, a steel cylinder valve automatic locking mechanism and a control system on the opposite side of the table, The filling valve group system and the filling mechanism, the weighing system carries the sliding base mechanism and the support frame, the steel cylinder filling positioning mechanism can slide back and forth on the sliding base mechanism, the steel cylinder filling mouth fine positioning mechanism and the steel cylinder The automatic valve locking mechanism is suspended above the steel cylinder to be filled through the support frame. The automatic valve locking mechanism of the steel cylinder is located above the fine positioning mechanism of the filling nozzle of the steel cylinder. One end of the filling mechanism is connected with the filling valve group system, and the other is One end can be connected with the bottle mouth of the steel cylinder to be filled, and the control system operates and controls the weighing system, the sliding base mechanism, the cylinder filling positioning mechanism, the cylinder filling mouth fine positioning mechanism, the cylinder valve automatic locking mechanism, and the filling mechanism and filling valve group system;

The filling valve group system adopts the high-precision automatic filling valve group according to claim 2.

Further, the sliding base mechanism includes a base, a sliding guide rail and a push cylinder, a pair of slide guide rails are arranged on the base, a push cylinder is arranged between the slide guide rails, and the push cylinder is connected to the bottom of the cylinder filling positioning mechanism. Driver connection.

Further, the cylinder filling and positioning mechanism includes a double-layer chassis, a lifting cylinder and a clamping and positioning cylinder. The lifting cylinder is arranged in the center of the double-layer chassis, and the number of clamping and positioning cylinders is four and symmetrically arranged on the circumference of the double-layer chassis.

Further, the fine positioning mechanism for the filling nozzle of the steel cylinder includes a hand lifting cylinder, a sliding guide bracket, a slide rail, a fine positioning hand, and a hand clamping cylinder. The hand lifting cylinder is driven and connected to the sliding guide bracket, and the sliding guide bracket can be Sliding on the slide rail to play the role of lifting, the fine positioning hand grip is set inside the sliding guide bracket, the end of the fine positioning hand grip is in the shape of tweezers and can be opened and closed to clamp the mouth of the steel cylinder that is to be filled, and the grip is clamped The cylinder is transversely arranged on the sliding guide bracket and the fine positioning grip and can control the opening and closing of the fine positioning grip.

Further, the cylinder valve automatic locking mechanism includes a support rod, a locking lifting cylinder, a locking electric screwdriver, an electric screwdriver bracket, and a locking finger. The batch bracket, the electric batch bracket is connected to the locking electric batch, the end of the locking electric batch is connected to the locking finger and can be driven to rotate, and the locking finger passes through the support rod.

Further, the filling mechanism includes a positioning bracket, a filling pipe, and a propelling cylinder. The propelling cylinder is arranged outside the positioning bracket, and a filling tube is provided inside the positioning bracket. The filling tube is connected to the propelling cylinder and passed through the propelling cylinder. Drive, one end of the filling pipe is connected to the valve pipe of the filling valve seat system, and the other end can be connected to the mouth of the steel cylinder to be filled.

Compared with the prior art, the present invention has the following advantages:

The invention is an automatic filling equipment for cold medium, which has reasonable structural design, convenient assembly and disassembly, improved work efficiency, stable operation, safety and reliability, accurate measurement accuracy, and is suitable for automatic filling of non-repeated refrigerant steel cylinders of various specifications. Pack. Its high-precision automatic filling valve group (filling valve group system), the combination of the refrigerant rough addition valve and the refrigerant fine addition valve can realize the precise filling of refrigerant steel cylinders of different specifications; The state pressure is monitored and sent to the remote PLC controller in real time, which plays a good role in protecting the safe operation of the valve seat; the refrigerant recovery valve can recover the remaining refrigerant after filling, which not only saves refrigerant, but also Ensure that the refrigerant does not leak out to avoid environmental pollution. Its universal pneumatic control valve, through long-term practice tests, has realized the accurate filling of various specifications of refrigerant media; specifically, the adjustment of the valve cover adjustment cap can be used to adapt to the filling pressure of different specifications of refrigerant media; the stroke The setting of the adjusting screw can be used to adjust the opening and closing degree between the valve stem with the disc assembly and the refrigerant inlet spool; the refrigerant inlet spool realizes fast and high-precision cooling of the refrigerant medium by replacing orifices of different sizes and specifications. Filling: The refrigerant valve body is provided with multiple refrigerant outlet pipe joints, which can realize simultaneous filling of multiple containers.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of an automatic filling equipment for cold medium according to the present invention.

Fig. 2 is a side structural schematic diagram of an automatic filling device for cold medium according to the present invention.

Fig. 3 is a structural schematic diagram of a sliding base mechanism of an automatic filling equipment for cold medium according to the present invention.

Fig. 4 is a structural schematic diagram of a cylinder filling positioning mechanism of an automatic filling equipment for cold medium according to the present invention.

Fig. 5 is a structural schematic diagram of a precise positioning mechanism of a steel cylinder filling nozzle of an automatic filling equipment for cold medium according to the present invention.

Fig. 6 is a structural schematic diagram of an automatic locking mechanism of a steel cylinder valve of an automatic filling equipment for cold medium according to the present invention.

Fig. 7 is a schematic diagram (1) of the overall structure of a high-precision automatic filling valve group for cold medium according to the present invention.

Fig. 8 is a schematic diagram (2) of the overall structure of a high-precision automatic filling valve group for cold medium according to the present invention.

Fig. 9 is a schematic diagram of the working principle of a high-precision automatic filling valve group for cold medium according to the present invention.

Fig. 10 is a structural schematic diagram of a filling mechanism of an automatic filling equipment for cold medium according to the present invention.

Fig. 11 is a schematic cross-sectional structure diagram of a general pneumatic control valve for refrigerant medium according to the present invention.

Fig. 12 is a schematic diagram of a universal pneumatic control valve for refrigerant medium according to the present invention to adjust the opening and closing degree between the valve stem driving the disc assembly and the refrigerant inlet valve core through the stroke adjustment screw.

Fig. 13 is a schematic diagram of a universal pneumatic control valve of a refrigerant medium in the present invention adapting to different pressures of the refrigerant medium through the adjustment of the bonnet adjustment cap.

Fig. 14 is a structural schematic diagram of a bonnet adjusting cap of a universal pneumatic control valve for refrigerant medium according to the present invention.

Fig. 15 is a working principle diagram (1) of an automatic filling equipment for cold medium according to the present invention.

Fig. 16 is a working principle diagram (2) of an automatic filling equipment for cold medium according to the present invention.

Reference signs: 1. weighing system; 2. sliding base mechanism; 21. base; 22. sliding guide rail; 23. pushing cylinder; 3. cylinder filling positioning mechanism; 31. double-layer chassis; 32. lifting cylinder; 33 , Clamping and positioning cylinder; 34, Guide plate; 4, Fine positioning mechanism of steel cylinder filling nozzle; 41, Hand lift cylinder; 42, Sliding guide bracket; 43, Slide rail; 44, Fine positioning hand grip; 45, Hand grip Clamping cylinder; 5. Cylinder valve automatic locking mechanism; 51. Strut; 52. Locking lifting cylinder; 53. Locking electric batch; 54. Electric batch bracket; 55. Locking finger; 6. Control system; 7 . Filling valve group system; 71. Valve seat; 72. Refrigerant filling pipe; 73. Vacuum valve; 74. Refrigerant rough addition valve; 75. Refrigerant fine addition valve; 76. Pressure sensor; -8. Vacuum solenoid valve; 7-9. Vacuum negative pressure gauge; 7-10. Two-position three-way solenoid valve; 7-11. Vacuum pump; 7-12. Compressed air source; 7-13. Four-way pipe joint; 7-14, refrigerant material main pipe; 7-15, two-position five-way solenoid valve; 7-16, recovery pressurized cylinder; 7-17, one-way valve one; 7-18, one-way valve two; 8, filling mechanism; 81, positioning bracket; 82, filling pipe; 83, propulsion cylinder; 9, steel cylinder to be filled; 101, support frame one; 102, support frame two; 11-1, refrigerant inlet valve core; Disc assembly; 11-3, plug; 11-4, refrigerant valve body; 11-5, sealing front gland; 11-6, sealing; 11-7, control valve body; 11-8, sealing rear gland ; 11-9, control valve piston; 11-10, exhaust hole; 11-11, valve cover; 11-12, leakage observation hole; 11-13, air intake hole; 11-14, valve stem; , Pressure adjustment spring; 11-16, bonnet adjustment cap; 11-17, stroke adjustment screw.

Implementation

Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, an automatic refrigerant filling equipment includes a weighing system 1 set up from bottom to top on one side of the platen, a sliding base mechanism 2, a cylinder filling positioning mechanism 3, and precise positioning of the cylinder filling nozzle. Mechanism 4, cylinder valve automatic locking mechanism 5 and control system 6 on the opposite side of the platen, filling valve group system 7 and filling mechanism 8, the weighing system 1 carries the sliding base mechanism 2 and the support frame, the steel cylinder The filling positioning mechanism 3 can slide back and forth on the sliding base mechanism 2, the steel cylinder filling nozzle fine positioning mechanism 4 and the steel cylinder valve automatic locking mechanism 5 are suspended above the steel cylinder 9 to be filled through the support frame, and the steel cylinder valve automatically The locking mechanism 5 is located above the fine positioning mechanism 4 for the filling nozzle of the steel cylinder. One end of the filling mechanism 8 communicates with the filling valve group system 7, and the other end communicates with the mouth of the steel cylinder 9 to be filled. The control system 6 Operation control weighing system 1, sliding base mechanism 2, steel cylinder filling positioning mechanism 3, steel cylinder filling mouth fine positioning mechanism 4, steel cylinder valve automatic locking mechanism 5, filling mechanism 8 and filling valve group system 7.

As shown in Fig. 3, described sliding base mechanism 2 comprises base 21, sliding guide rail 22 and pushing cylinder 23, is arranged on base 21 paired sliding guide rail 22, is provided with pushing cylinder 23 between sliding guide rail 22, described pushing The cylinder 23 is drivingly connected to the bottom of the cylinder filling positioning mechanism 3 .

As shown in Figure 4, the cylinder filling positioning mechanism 3 includes a double-layer chassis 31, a lifting cylinder 32 and a clamping and positioning cylinder 33, the lifting cylinder 32 is arranged at the center of the double-layer chassis 31, and the number of clamping and positioning cylinders 33 is four and It is arranged in the circumferential direction of the double-layer chassis 31 in cross symmetry. Specifically, the clamping and positioning cylinder 33 is in front of the guide plate 34 , and the clamping and positioning cylinder 33 drives the guide plate 34 to move inward so as to clamp the steel cylinder 9 to be filled.

As shown in Figure 5, the fine positioning mechanism 4 for the filling nozzle of the steel cylinder includes a hand lift cylinder 41, a sliding guide bracket 42, a slide rail 43, a fine positioning hand grasp 44, a hand clamping cylinder 45, and a hand lift cylinder 41. Drive and connect the sliding guide bracket 42, the sliding guide bracket 42 can slide on the slide rail 43 so as to play the effect of lifting, the fine positioning hand grasps 44 and is arranged on the inside of the sliding guide bracket 42, and the fine positioning hand grasps 44 ends in the shape of tweezers and It can open and close the bottle mouth of the filling steel cylinder 9, and the clamping cylinder 45 is transversely installed on the sliding guide bracket 42 and the fine positioning hand grasping 44 and can control the opening and closing of the fine positioning hand grasping 44.

As shown in Figure 6, the cylinder valve automatic locking mechanism 5 includes a support rod 51, a locking lifting cylinder 52, a locking electric batch 53, an electric batch bracket 54, and a locking finger 55. The locking electric batch 53 passes through the electric batch The bracket 54 is fixedly connected, and the end of the locking electric batch 53 is connected to the locking finger 55 and can be driven to rotate. The locking finger 55 passes through the pole 51, and the locking finger 55 can clamp and rotate the mouth of the steel cylinder 9 to be filled. The filling valve and the locking lift cylinder 52 are connected to the electric batch support 54 and drive the electric batch support 54 to lift.

As shown in Figures 7 and 8, the filling valve group system 7 includes a valve seat 71, a refrigerant filling pipe 72, a vacuum valve 73, a rough refrigerant addition valve 74, a fine refrigerant addition valve 75, a pressure sensor 76, and a refrigerant recovery valve. 77, the valve seat 71 is a rotatable five-way valve seat, the refrigerant filling pipe 72 is connected to the valve seat 71, the vacuum valve 73, the refrigerant rough addition valve 74, the refrigerant fine addition valve 75, and the refrigerant recovery valve 77 They communicate with the valve seat 71 and are respectively controlled by the control system 6 through a two-position three-way solenoid valve. The pressure sensor 76 communicates with the control system 6. The refrigerant rough addition valve 74, refrigerant fine addition valve 75, refrigerant recovery The other end of the valve 77 is respectively connected to the refrigerant material main pipe through a four-way pipe joint. Specifically, the pressure sensor 76 is used to monitor the pressure values under different working conditions in the valve seat 71. When the monitored pressure is greater than the set pressure threshold, the pressure sensor 76 transmits information to the control system 6, and through the control system 6 Make corresponding alarms.

As shown in Figure 9, the other end of the vacuum valve 73 is connected to the vacuum pump 7-11, and the other ends of the refrigerant rough addition valve 74 and the refrigerant fine addition valve 75 are respectively connected to the refrigerant material main pipe 7 through the four-way pipe joint 7-13. -14 and external compressed air sources 7-12 respectively, the compressed air sources 7-12 can respectively provide compressed air for the refrigerant coarse addition valve 74 and the refrigerant fine addition valve 75, and the refrigerant recovery valve 77 recovers the booster cylinder 7 -16 and the two-position five-way solenoid valve 7-15 are connected to the four-way pipe joint 7-13 and the refrigerant material main pipe 7-14, and the recovery booster cylinder 7-16 is respectively provided with check valves before and after.

Described vacuum valve 73 is also connected to vacuum negative pressure gauge 7-9 by a vacuum electromagnetic valve 7-8, and described vacuum negative pressure gauge 7-9 is connected with controller 6 communication, and described vacuum negative pressure gauge 7-9 uses To measure the degree of vacuum in the vacuum valve 73.

The working principle of a high-precision automatic filling valve group for cold medium is as follows:

Step 1), the refrigerant filling pipe 72 is docked and sealed with the refrigerant canned steel cylinder 9, the controller 6 opens the vacuum valve 73 by controlling the two-position three-way solenoid valve 7-10, and at the same time all other valves are closed, and then The vacuum pump 7-11 vacuumizes the refrigerant canned steel cylinder 9, the vacuum solenoid valve 7-8 is connected to the vacuum negative pressure gauge 7-9 and can measure the vacuum degree in real time, when the preset vacuum value is reached, the The vacuum negative pressure gauge 7-9 feeds back to the controller 6, and now the controller 6 closes the vacuum valve 73 by controlling the two-position three-way solenoid valve 7-10 again, and the vacuuming is completed;

Step 2), after the vacuuming is completed, the controller 6 opens the refrigerant coarse feeding valve 74 by controlling the two-position three-way solenoid valve 7-10, and at the same time all other valves are closed, and the refrigerant flows from the refrigerant material main pipe 7 -14 enters the refrigerant coarse filling valve 74 through the four-way pipe joint 7-13, and the refrigerant automatic filling starts. When the preset weight value is reached, the controller 6 again controls the two-position three-way solenoid valve 7-10 to close The refrigerant coarse addition valve 74 is described, and the refrigerant rough addition is completed; specifically, the compressed air source 7-12 sends compressed air to the control chamber of the refrigerant rough addition valve 74 to close the refrigerant rough addition valve 74;

Step 3), after the rough addition of refrigerant is completed, the controller 6 opens the fine refrigerant addition valve 75 by controlling the two-position three-way solenoid valve 7-10, while all other valves are closed, and the refrigerant flows from the refrigerant material main pipe 7-14 enters the refrigerant finishing valve 75 through the four-way pipe joint 7-13, and the precise and automatic filling of the refrigerant begins. When the preset weight value is reached, the controller 6 again controls the two-position three-way solenoid valve 7-10 Close the refrigerant finishing valve 75, and the refrigerant filling is completed; specifically, the compressed air source 7-12 delivers compressed air to the control cavity of the refrigerant finishing valve 75 to close the refrigerant finishing valve 75;

Step 4), after the refrigerant filling is completed, the controller 6 first opens the refrigerant recovery valve 77 by controlling the two-position three-way solenoid valve 7-10, and ensures that all other valves are closed, while the controller 6 Then by controlling the two-position five-way solenoid valve 7-15 to regulate and control the recovery booster cylinder 7-16 to start working, when the piston in the recovery booster cylinder 7-16 squeezes upward, the refrigerant filling pipe 72 and the rotatable five-way valve The remaining residual refrigerant in the seat 71 is drawn back into the recovery booster cylinder 7-16 through the opened refrigerant recovery valve 77 and the one-way valve 7-17, when the piston in the recovery booster cylinder 7-16 squeezes downward When pressing, the residual refrigerant in the recovery pressurized cylinder 7-16 is pressed back to the refrigerant material main pipe 7-14 through the check valve 2 7-18, and the refrigerant recovery is completed; the controller 6 again controls the two-position three-way solenoid valve 7-10 closing the refrigerant recovery valve 77;

So far, one cycle of precise and automatic refrigerant filling is completed.

As shown in Figure 10, the filling mechanism 8 includes a positioning bracket 81, a filling pipe 82, and a propulsion cylinder 83. There is a filling pipe 82, the filling pipe 82 is connected to the propulsion cylinder 83 and driven by the propulsion cylinder 83, one end of the filling pipe 82 is connected to the valve pipe of the filling valve seat system 7, and the other end can be connected to the valve pipe for filling The filling mouth of the bottle mouth of steel cylinder 9.

In the high-precision automatic filling valve group of the present invention, the refrigerant rough addition valve 74 and the refrigerant fine addition valve 75 are general pneumatic control valves. As shown in Figure 11, the general pneumatic control valve of the present invention includes a refrigerant valve body 11-4, a control valve body 11-7, and a sealing assembly between the refrigerant valve body 11-4 and the control valve body 11-7, a valve The rod 11-14 runs through the refrigerant valve body 11-4, the sealing assembly and the control valve body 11-7 in sequence. The front port of the refrigerant valve body 11-4 is connected to the refrigerant inlet spool 11-1, and the valve stem part of the valve clack assembly 11-2 is sleeved inside and at the end of the refrigerant valve body 11-4 and the refrigerant inlet spool 11-1 It can be opened and closed, and the disc assembly 11-2 is connected with the inner valve stem part of the refrigerant valve body 11-4 through freely movable pins, so as to ensure zero leakage and long-term sealing with the refrigerant inlet valve core 11-1. One side of the refrigerant valve body 11-4 is provided with a refrigerant outlet pipe joint 11-18, and the other side is provided with a plug 11-3, the refrigerant outlet pipe joint 11-18 faces downward, and the plug 11-3 up. The end of the valve stem part of the control valve body 11-7 is socketed with the control valve piston 11-9, and the rear port of the control valve body 11-7 is closed by a valve cover 11-11, and the valve cover 11-11 is provided with an exhaust valve. Hole 11-10, the bonnet 11-11 can be movably screwed to the bonnet adjustment cap 11-16, the bonnet adjustment cap 11-16 can be movably screwed to the stroke adjustment screw 11-17, and the stroke adjustment screw 11-17 wears Cover the pressure adjustment spring 11-15, the pressure adjustment spring 11-15 extends into the gap between the bonnet adjustment cap 11-16 and the stroke adjustment screw 11-17, the control valve piston 11-9 drives the valve stem 11-14 can be opened and closed connected with stroke adjustment screw rod 11-17. One side of the control valve body 11-7 is provided with an air inlet 11-13.

The sealing assembly includes a sealing front gland 11-5, a sealing rear gland 11-8, and several seals 11-6 between the sealing front gland 11-5 and the sealing rear gland 11-8, and the sealing 11-6 There is a leakage observation hole 11-12 between them. Specifically, four seals 11-6 are provided, two seals 11-6 form a group, and an orifice is provided between the groups of seals 11-6, and the orifice is connected to the leakage observation hole 11-12. When it is found that the leakage observation hole 11-12 leaks, it means that the first two seals 11-6 have leaks, but there are also the rear two seals 11-6, which does not affect the normal filling, and can be repaired at an appropriate time.

The refrigerant inlet valve core 11-1 has several specifications, and different specifications correspond to different orifice sizes of the refrigerant inlet valve core 11-1. The size of the orifice of the refrigerant inlet spool 11-1 determines the flow rate of the refrigerant medium. The larger the orifice of the spool, the larger the flow, and the smaller the orifice of the spool, the smaller the flow. The refrigerant inlet spool 11-1 is easy to install and disassemble. If it is replaced with a small aperture, it will be a finishing control valve, and if it is replaced with a large aperture, it will be a roughing control valve. When the finishing control valve and the roughing control valve form a set of control valves, fast and high-precision filling of cold medium can be realized.

The refrigerant valve body 11-4 is provided with several refrigerant outlet pipe joints 11-18, which can realize simultaneous filling of multiple containers.

When the pressure adjustment spring 11-15 is offset against the control valve piston 11-9 that drives the valve rod 11-14, that is, one end of the pressure adjustment spring 11-15 is offset against the control valve piston 11-9, and at this time the stroke adjustment screw rod 11-17 Not offset against the control valve piston 11-9, there is a certain distance between the stroke adjustment screw 11-17 and the control valve piston 11-9, this distance can be used by the valve stem 11-14 to drive the disc assembly 11-2 and the refrigerant inlet valve Opening and closing of the core 11-1. As shown in Figure 12, the valve rod 11-14 drives the opening and closing degree between the valve clack assembly 11-2 and the refrigerant inlet valve core 11-1. 11 part length value) to control; when the stroke adjustment screw 11-17 rotates counterclockwise, the stroke adjustment screw 11-17 moves to the right, the length value A increases, and the opening and closing degree increases; when the stroke When the adjustment screw rod 11-17 rotates clockwise, the stroke adjustment screw rod 11-17 moves to the left, the length value A decreases, and the opening and closing degree decreases.

The present invention is a general pneumatic control valve for cold medium, which is a normally closed valve under normal conditions, and the pressure regulating springs 11-15 are used to provide pressure. As shown in Figure 13, specifically, the bonnet 11-11, the bonnet adjusting cap 11-16 and the control valve piston 11-9 constitute the preloading amount of the pressure regulating spring 11-15, by fine-tuning the B length value (bonnet Adjust the length of the cap 11-16 extending out of the bonnet 11-11) to control the pre-tightening force of the pressure adjustment spring 11-15, so as to adapt to the pressure of different refrigerant media; in order to prevent the refrigerant from entering the refrigerant inlet spool 11- 1. That is to make the pressure regulating spring 11-15 withstand the pressure of the control valve piston 11-9 that drives the valve stem 11-14 to be greater than or equal to the pressure of the refrigerant medium; when the pressure of the refrigerant medium is low, the bonnet adjustment cap 11-16 Rotate counterclockwise, the length value B increases, and the pretightening force of the pressure adjustment spring 11-15 decreases accordingly; when the pressure of the refrigerant medium is high, the bonnet adjustment cap 11-16 rotates clockwise, and the length value B decreases Small, the pretightening force of pressure adjustment spring 11-15 increases thereupon. As shown in Fig. 14, the scale value of evenly distributed eight equal divisions is engraved on the outer peripheral surface of the bonnet adjusting cap 11-16, and the pitch of the bonnet adjusting cap 11-16 is 2 mm, and every 1/8 turn, The adjusted length B is 0.25mm, which meets the requirement of pressure regulation accuracy.

The present invention is a universal pneumatic control valve for cold medium, and its working principle is as follows: (1) When the cold medium needs to be filled, the air intake holes 11-13 start to press compressed air, and the pressure of the compressed air is greater than the pressure Adjust the spring force of the spring 11-15, and the pressure of the compressed air pushes the control valve piston 11-9 to drive the valve stem 11-14 and the disc assembly 11-2 to move towards the valve cover 11-11, and the valve cover moves at the same time The exhaust hole 11-10 opened in 11-11 is exhausted until the control valve piston 11-9 bumps into the stroke adjustment screw 11-17. At this time, the refrigerant inlet spool 11-1 and the disc assembly The valve stem 11-14 of 11-2 is detached and separated, and the refrigerant medium enters the refrigerant valve body 11-4 through the refrigerant inlet valve core 11-1 and fills the cavity instantly, and then the refrigerant medium is released from the refrigerant outlet pipe joint 11-18. into the container to be filled. (2) After the filling is completed, the air inlet 11-13 starts to release pressure, and the pressure regulating spring 11-15 pushes the control valve piston 11-9 to drive the valve stem 11-14 and the valve disc assembly 11-2 Move toward the direction of the refrigerant inlet valve core 11-1, the refrigerant inlet valve core 11-1 is closed with the valve stem 11-14 with the disc assembly 11-2, one filling is completed, and the next filling is ready.

For an automatic filling device for cold medium, specifically, the support frame includes a support frame one 101 and a support frame two 102 . The support frame one 101 is erected on the base 21 of the sliding base mechanism 2 and is positioned on the outside of the pair of sliding guide rails 22. The support frame one 101 includes four columns and a square frame at the top of the four columns. There are reinforced columns. The second support frame 102 is erected on the square frame of the first support frame 101. The second support frame 102 includes four columns and a square plate on the top of the four columns, and the center of the square plate is hollowed out. The steel cylinder filling positioning mechanism 3 drives the steel cylinder 9 to be filled to slide to the area to be filled, that is, the inside of the support frame 101; the hand lift cylinder 41 of the steel cylinder filling mouth fine positioning mechanism 4 vertically penetrates the support The square plate of the frame two 102, its slide rail 43 is located on the frame plate on one side of the support frame two 102, and the end of its precise positioning hand grab 44 stretches into the inside of the support frame one 101 and is aligned with the steel cylinder 9 to be filled. bottle mouth; the pole 51 of the cylinder valve automatic locking mechanism 5 is erected on the square frame of the support frame one 101, and the locking electric batch 53 penetrates the hollow place in the center of the square plate of the support frame two 102 And fixedly connected to the electric batch bracket 54, the locking electric batch 53 is connected to the locking finger 55, and the locking finger 55 passes through the pole 51 and is aligned with the filling valve of the bottle mouth of the steel cylinder 9 to be filled, and the locking lifting cylinder 52 Penetrate the square plate of the support frame two 102 and be fixedly connected to the electric batch support 54, lock the lifting cylinder 52 to drive the electric batch support 54 up and down, and the electric batch support 54 can be fixedly connected to the square plate of the support frame two 102 The two guide pillars on the top slide; the positioning bracket 81 of the filling mechanism 8 is fixedly connected to the two columns outside the support frame 101 through the frame plate, and the filling pipe 82 penetrates into the frame plate and then extends into the support Frame one 101 inside and aim at the filling mouth of the bottle mouth of steel cylinder 9 to be filled.

It should be noted that the steel cylinder 9 to be filled in the present invention is a non-refillable refrigerant steel cylinder, and the steel cylinder 9 to be filled is wrapped by a cuboid packaging box and exposes the bottle mouth. Figure 15 shows that the total equipment is in the loading and unloading station Figure 16 is a schematic diagram of the working principle of the general equipment at the filling station.

The working principle of a kind of refrigerant automatic filling equipment of the present invention is:

In the first step, when the steel cylinder filling positioning mechanism 3 is at the pick-up and discharge station, as shown in Figure 15, the steel cylinder 9 to be filled is automatically grasped by the mechanical arm and put into the steel cylinder filling positioning mechanism 3. At this time, the steel cylinder is filled The sensor in the positioning mechanism 3 senses the steel cylinder 9 to be filled, and its clamping and positioning cylinder 33 immediately clamps the steel cylinder 9 to be filled;

In the second step, the sliding base mechanism 2 pushes the cylinder filling positioning mechanism 3 and the steel cylinder 9 to be filled to the filling station of the sliding base mechanism 2 through its push cylinder 23 and sliding guide rail 22, as shown in Figure 16 Show;

In the third step, after the steel cylinder filling positioning mechanism 3 and the steel cylinder 9 to be filled are in place, the fine positioning claw 44 in the fine positioning mechanism 4 of the steel cylinder filling mouth is lowered to the steel cylinder to be filled through the claw lifting cylinder 41 9, then clamp the cylinder 45 with the claws to clamp the bottle mouth, which plays a role in the precise positioning of the bottle mouth of the steel cylinder 9 to be filled;

In the fourth step, after the positioning of the mouth of the filled steel cylinder 9 is completed, the filling mechanism 8 starts to perform actions, and the filling pipe 82 of the filling mechanism 8 is pushed through the push cylinder 83 until it is filled with the accurately positioned bottle mouth. Mouth docking and sealing;

In the fifth step, after the filling pipe 82 of the filling mechanism 8 is docked with the filling port of the mouth of the steel cylinder 9 to be filled, the filling valve group system 7 starts to work, and the weighing system 1 and the The filling valve group system 7 cooperates with each other and interacts in real time. The vacuum valve 73 of the filling valve group system 7 vacuumizes the steel cylinder 9 to be filled, and its refrigerant rough addition valve 74 performs high-flow filling of the steel cylinder 9 to be filled. , the refrigerant finishing valve 75 is used to accurately fill the steel cylinder 9 to be filled with a small flow rate, and after the filling is completed, the refrigerant recovery valve 77 recovers the refrigerant material from the filling pipe 82 of the filling mechanism 8;

In the sixth step, after the recovery of the refrigerant material is completed, the cylinder valve automatic locking mechanism 5 starts to work, and its locking finger 55 descends to the bottom of the steel cylinder 9 to be filled by locking the lifting cylinder 52, the electric batch bracket 54 and the guide pillar. At the filling valve of the bottle mouth, the locking electric batch 53 drives the locking finger 55 to lock the filling valve, and the filling of the steel cylinder 9 is completed until now.

After the filling is completed, all mechanisms start to retreat: the first step, the locking and lifting cylinder 52 lifts the cylinder valve automatic locking mechanism 5 and retreats; the second step, the filling mechanism 8 pushes the cylinder through it 83 retreat; in the third step, the cylinder filling mouth fine positioning mechanism 4 releases the fine positioning gripper 44, and at the same time the gripper lift cylinder 41 rises and retreats; in the fourth step, the cylinder filling positioning mechanism 3 passes through the The pushing cylinder 23 and sliding guide rail 22 of the sliding base mechanism 2 retreat to the pick-and-place material station shown in Figure 15; in the fifth step, the clamping and positioning cylinder 33 in the cylinder filling and positioning mechanism 3 is released . So far, all mechanisms have completed a refrigerant charging action, and all mechanism components return to their initial positions, waiting for the next charge.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be regarded as Within the protection scope of the present invention.

Claims (8)

1. A general-purpose pneumatic control valve for refrigerant medium, including a refrigerant valve body, a control valve body, and a sealing assembly between the refrigerant valve body and the control valve body, a valve stem passing through the refrigerant valve body, the sealing assembly, and the control valve body in sequence, It is characterized in that: the front port of the refrigerant valve body is pierced with the refrigerant inlet valve core, and the valve stem part of the refrigerant valve body and the end part of the disc assembly is openable and connected to the refrigerant inlet valve core, and one side of the refrigerant valve body There is a refrigerant outlet pipe joint, and a plug is provided on the other side; the end of the valve stem in the control valve body is sleeved with the control valve piston, and the rear port of the control valve body is connected to the bonnet, which can be movably connected to the bonnet for adjustment. Cap, the bonnet adjustment cap can be movably connected with the stroke adjustment screw, the stroke adjustment screw wears the pressure adjustment spring, the control valve piston drives the valve stem and the stroke adjustment screw can be opened and closed, and the control valve body is opened on one side air intake. 2. A high-precision automatic filling valve group comprising the universal pneumatic control valve of the refrigerant medium according to claim 1, characterized in that: it includes a valve seat, a refrigerant filling pipe, a vacuum valve, a refrigerant roughing valve, and a refrigerant finishing valve , a pressure sensor, a refrigerant recovery valve, the refrigerant filling pipe is connected to the valve seat, the valve seat is a rotatable five-way valve seat, the vacuum valve, the refrigerant rough addition valve, the refrigerant fine addition valve, and the refrigerant recovery valve are respectively It communicates with the valve seat and is respectively controlled by a remote PLC controller through a two-position three-way solenoid valve. The pressure sensor communicates with the remote PLC controller. The other end of the vacuum valve is connected to a vacuum pump. The refrigerant roughing valve, The other end of the refrigerant finishing valve is respectively connected to the refrigerant material main pipe through a four-way pipe joint and connected to an external compressed air source. Joints and refrigerant material mains; Both the rough refrigerant addition valve and the refrigerant fine addition valve adopt the general pneumatic control valve of claim 1. 3. An automatic filling device comprising the high-precision automatic filling valve group of the refrigerant medium according to claim 2, characterized in that: it includes a weighing system arranged from bottom to top on one side of the platen, a sliding base mechanism, and a cylinder filling The positioning mechanism, the fine positioning mechanism of the filling nozzle of the steel cylinder, the automatic locking mechanism of the cylinder valve and the control system on the opposite side of the table, the filling valve group system and the filling mechanism, the weighing system carries the sliding base mechanism and the support frame, and the The steel cylinder filling positioning mechanism can slide back and forth on the sliding base mechanism, the steel cylinder filling nozzle fine positioning mechanism and the steel cylinder valve automatic locking mechanism are suspended above the steel cylinder to be filled through the support frame, and the steel cylinder valve automatic locking mechanism It is located above the precise positioning mechanism of the filling nozzle of the steel cylinder. One end of the filling mechanism is connected with the filling valve group system, and the other end can be connected with the mouth of the steel cylinder to be filled. The control system operates and controls the weighing system and the sliding base Mechanism, cylinder filling positioning mechanism, cylinder filling mouth fine positioning mechanism, cylinder valve automatic locking mechanism, filling mechanism and filling valve group system; The filling valve group system adopts the high-precision automatic filling valve group according to claim 2. 4. A kind of automatic filling equipment for cold medium according to claim 3, characterized in that: said sliding base mechanism comprises a base, sliding guide rails and pushing cylinders, and pairs of sliding guide rails are arranged on the base, and between the sliding guide rails A push cylinder is arranged between them, and the push cylinder is connected to the bottom of the cylinder filling positioning mechanism by driving. 5. The automatic filling equipment for cold medium according to claim 3, characterized in that: the cylinder filling and positioning mechanism includes a double-layer chassis, a lifting cylinder and a clamping positioning cylinder, and the lifting cylinder is arranged on the double-layer chassis In the center, there are four clamping and positioning cylinders, which are arranged symmetrically in the circumferential direction of the double-layer chassis. 6. The automatic filling equipment for cold medium according to claim 3, characterized in that: the precise positioning mechanism of the filling mouth of the steel cylinder comprises a hand lift cylinder, a sliding guide bracket, a slide rail, a fine positioning hand, Hand grip clamping cylinder, hand grip lifting cylinder drives and connects the sliding guide bracket, the sliding guide bracket can slide on the slide rail to play the role of lifting, the fine positioning hand grip is set inside the sliding guide bracket, and the fine positioning hand grip end It is in the shape of tweezers and can be opened and closed to clamp the mouth of the steel cylinder for filling. The clamping cylinder of the hand grip is horizontally installed on the sliding guide bracket and the fine positioning grip and can control the opening and closing of the fine positioning grip. 7. The automatic filling equipment for cold medium according to claim 3, characterized in that: the cylinder valve automatic locking mechanism includes a support rod, a locking lifting cylinder, a locking electric batch, an electric batch bracket, a lock Tighten the fingers, lock the lifting cylinder on the outside of the pole, and there is also an electric batch bracket on the outside of the pole. The electric batch bracket is connected to the locking electric batch. Fingers stick out of the pole. 8. A kind of automatic filling equipment for cold medium according to claim 7, characterized in that: the filling mechanism includes a positioning bracket, a filling pipe, and a propelling cylinder, and the propelling cylinder is arranged on the outside of the positioning bracket, positioning There is a filling pipe inside the bracket, which is connected to the propulsion cylinder and driven by the propulsion cylinder. One end of the filling pipe is connected to the valve pipe of the filling valve seat system, and the other end can be connected to the mouth of the cylinder to be filled. .

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