CN220646830U - An exhaust switch valve and a hot melt adhesive machine having the same - Google Patents

Abstract

The utility model discloses an exhaust switch valve, which includes a switch seat. The inside of the switch seat is provided with an exhaust channel and an installation channel that is connected with the exhaust channel and cuts off the exhaust channel; the inner wall of the installation channel is at the center of the exhaust channel. A threaded groove and a first annular groove are provided up and down above. A movable ejector pin for blocking the exhaust passage is threaded in the threaded groove. A first sealing ring is provided in the first annular groove for forming a sealing fit with the surface of the movable ejector pin. As a result, the ejector pin is driven to move up and down to block or open the exhaust passage, thereby realizing the opening or closing of the exhaust switch valve without clogging. At the same time, the first sealing ring is also provided for sealing protection. To avoid failure of the screw joint structure. It adopts different blocking and opening methods, which changes the problem of liquid glue easily condensing in the hole of the ball valve and causing blockage when the faucet structure is used in the past.

Description

Exhaust switch valve and hot melt adhesive machine having the same

Technical field

The utility model relates to the technical field of hot melt glue machines, and in particular to an exhaust switch valve and a hot melt glue machine having the same.

Background technique

This section only provides background information related to the present application to facilitate those skilled in the art to understand the present application more thoroughly and accurately. It is not necessarily prior art.

The hot melt glue machine is mainly an automated application equipment used for squeegeeing, rolling and gluing of hot melt adhesive. It is used to heat barreled fixed glue into liquid glue to achieve squeegeeing, rolling or gluing. processing.

Current hot melt glue machines require an exhaust switch component on the gland in the equipment. The exhaust switch component is used to drain the air in the barrel before the gland is pressed down into the barrel, thereby avoiding the risk of air leakage. Due to the existence of the gland, the gland cannot fully contact the solid glue in the barrel. During operation, the exhaust switch component is usually opened, and the gland is pressed down to evacuate the air. When the exhaust switch component discharges the liquid glue, it means that the air in the barrel has been exhausted. As shown in Figure 1-2, the existing exhaust switch components all use the structure of the faucet 11. There are problems with the structure of the faucet 11. The liquid glue is easy to condense in the hole of the ball valve in the faucet 11, thereby causing the exhaust passage. Blockage problem.

Utility model content

The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, the utility model proposes an exhaust switch valve and a hot melt glue machine having the same, so that the exhaust passage will not be blocked.

The utility model adopts the following technical solution to realize: an exhaust switch valve, including a switch seat. The inside of the switch seat is provided with an exhaust channel and a device connected with the exhaust channel and cutting off the exhaust channel. aisle;

The inner wall of the installation channel is provided with a threaded groove and a first annular groove up and down above the exhaust channel. A movable ejector pin for blocking the exhaust channel is threaded in the threaded groove. The first annular groove is A first sealing ring for forming a sealing fit with the surface of the moving ejector pin is disposed in the groove.

Therefore, the present utility model provides an installation channel for cutting off the exhaust channel, and provides a movable ejector pin for blocking the exhaust channel in the installation channel, so as to drive the movable ejector pin up and down by utilizing the screw connection structure to achieve the exhaust gas discharge. The air passage is blocked or opened, thereby realizing the opening or closing of the exhaust switch valve without clogging. At the same time, the first sealing ring is also provided for sealing protection to avoid failure of the screw joint structure. It adopts different blocking and opening methods, which changes the problem of liquid glue easily condensing in the hole of the ball valve and causing blockage when the faucet structure is used in the past. In addition, with the above structure, the operation force is relatively smaller and the operation is more convenient than when using the faucet structure.

In one embodiment, the end of the movable ejector pin is tapered so that a first annular slope is formed on the movable ejector pin;

The installation channel includes an upper hole section located above the exhaust channel and a lower hole section located below the exhaust channel. The bottom of the lower hole section is connected to the outside, and the inner wall of the lower hole section is provided with a useful On the second annular inclined surface that abuts the first annular inclined surface.

In one embodiment, the inner wall of the upper hole section is provided with a third annular slope, and the surface of the moving ejector pin is provided with a fourth annular slope for abutting with the third annular slope.

In one embodiment, there are at least two first annular grooves, and at least two first annular grooves are arranged one above the other.

In one embodiment, the exhaust channel has an inlet end, a second annular groove is provided on the switch seat surrounding the inlet end, and a second sealing ring is provided in the second annular groove.

In one embodiment, the switch base is further provided with at least one mounting hole, and at least one mounting hole is arranged parallel to the exhaust channel.

The utility model also provides a hot melt glue machine, which includes a gland and an exhaust switch valve as described above, and the switch seat is arranged on the gland.

In one embodiment, a drive motor located above the gland is further included, and the driving end of the drive motor and the gland are connected through a universal coupling transmission assembly.

In one embodiment, the gland is further provided with a valve body having a cavity inside, the bottom of the valve body is provided with a return port connected to the cavity, and the side wall of the valve body is provided with A discharge port connected to the cavity, an adjusting nut is connected to the top of the valve body, and the bottom end of the adjusting nut extends into the cavity;

A valve core blocking the return port is provided inside the cavity, an elastic pressure member is provided between the valve core and the adjusting nut, and a return groove is provided on the side wall of the valve core. , the backflow groove shrinks from the bottom of the valve core to the top of the valve core;

When the valve core presses the elastic pressure member to lift up and open the return port, the return port communicates with the discharge port through the return groove.

In one embodiment, the cross-section of the reflow groove is triangular or inverted trapezoidal.

Compared with the existing technology, the present utility model has the following beneficial effects: the utility model provides an installation channel for cutting off the exhaust channel, and provides a moving ejector pin for blocking the exhaust channel in the installation channel to utilize screws. The connecting structure drives the moving ejector pin to move up and down to block or open the exhaust channel, thereby realizing the opening or closing of the exhaust switch valve without clogging. At the same time, the first sealing ring is also provided for sealing protection. To avoid failure of the screw joint structure. It adopts different blocking and opening methods, which changes the problem of liquid glue easily condensing in the hole of the ball valve and causing blockage when the faucet structure is used in the past. In addition, with the above structure, the operation force is relatively smaller and the operation is more convenient than when using the faucet structure.

Description of drawings

Figure 1 is a schematic three-dimensional structural diagram of the partial structure of a hot melt adhesive machine;

Figure 2 is an enlarged view of part A in Figure 1;

Figure 3 is a schematic three-dimensional structural diagram of the exhaust switch valve of the present utility model when it is equipped with a connecting rod;

Figure 4 is a schematic three-dimensional structural diagram of the exhaust switch valve of the present utility model;

Figure 5 is a schematic diagram of the explosion structure of the exhaust switch valve of the present utility model;

Figure 6 is a schematic diagram of the internal structure of the exhaust switch valve of the present utility model;

Figure 7 is a schematic diagram of the internal structure of the switch seat in the exhaust switch valve of the present invention;

Figure 8 is a schematic three-dimensional structural diagram of the valve body and valve core in the hot melt adhesive machine after assembly;

Figure 9 is a schematic diagram of the internal structure of the valve body and valve core in the hot melt adhesive machine after assembly;

Figure 10 is a schematic three-dimensional structural diagram of the valve core in the hot melt adhesive machine.

Each number in the figure represents the following meaning: 100, hot melt adhesive machine; 200, gland; 3, switch seat; 31, exhaust channel; 32, installation channel; 321, upper hole section; 3211, thread groove; 3212, No. An annular groove; 3213. The third annular bevel; 322. The lower hole section; 3221. The second annular bevel; 4. Moving ejector pin; 41. The first annular bevel; 42. The fourth annular bevel; 5. The first sealing ring; 6. Second annular groove; 7. Installation hole; 8. Universal coupling transmission component; 9. Valve body; 10. Valve core; 101. Return groove; 11. Faucet.

Detailed ways

In order to further elaborate on the technical means and effects adopted by the present application to achieve the intended purpose, the specific implementation manner, structure, features and effects of the present application are described in detail below in conjunction with the drawings and preferred embodiments.

In the following description, different terms "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, the specific features, structures, or characteristics of one or more embodiments may be combined in any suitable combination.

It should also be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and "inner" The orientation or positional relationship indicated by "outside" or "outside" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or component referred to must have specific characteristics. Orientation, construction and operation in specific orientations and therefore should not be construed as limitations of the invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the invention belongs. The terms used in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

As shown in Figures 3-7, the utility model discloses an exhaust switch valve, which can be used in a hot melt glue machine 100.

Specifically, the exhaust switch valve includes a switch seat 3. An exhaust channel 31 and an installation channel 32 are respectively provided inside the switch seat 3. The installation channel 32 is connected with the exhaust channel 31, and the installation channel 32 blocks the exhaust channel 31. In this embodiment, the installation channel 32 and the exhaust channel 31 are arranged vertically, and the entire installation channel 32 has an inverted T-shaped structure.

In addition, the inner wall of the installation channel 32 is provided with a threaded groove 3211 and a first annular groove 3212. The threaded groove 3211 and the first annular groove 3212 are arranged up and down, and the threaded groove 3211 and the first annular groove 3212 are located in the exhaust channel 31 At the upper position, a movable ejector pin 4 is threaded in the threaded groove 3211. The movable ejector pin 4 is used to block the exhaust channel 31. That is, the exhaust channel 31 can be blocked by moving the ejector pin 4 to realize the exhaust switch valve. Close, or the exhaust channel 31 can be opened by moving the thimble 4 to open the exhaust switch valve. Furthermore, a first sealing ring 5 is provided in the first annular groove 3212. The first sealing ring 5 is used to form a sealing fit with the surface of the moving ejector pin 4. In this way, under the sealing effect of the first sealing ring 5, overflow is effectively avoided. The liquid glue in the exhaust channel 31 is squeezed into the threaded groove 3211 through the gap between the moving ejector pin 4 and the installation channel 32, causing the screw joint structure to fail, thus effectively protecting the long-term use of the exhaust switch valve.

It can be seen that the present utility model provides an installation channel 32 for cutting off the exhaust channel 31, and provides a movable ejector pin 4 for blocking the exhaust channel 31 in the installation channel 32, so as to drive the movement by using a screw structure. The thimble 4 moves up and down to block or open the exhaust channel 31, thereby realizing the opening or closing of the exhaust switch valve without clogging. At the same time, the first sealing ring 5 is also provided for sealing protection to avoid screws. The connection structure fails. It adopts different blocking and opening methods, which changes the problem that when the faucet 11 structure is used in the past, liquid glue is easy to condense in the hole of the ball valve and cause blockage. In addition, with the above structure, the operation force is relatively smaller and the operation is more convenient than when using the faucet 11 structure.

The end of the movable ejector pin 4 has a tapered shape, so that a first annular inclined surface 41 is formed on the movable ejector pin 4 . Further, the installation channel 32 includes an upper hole section 321 and a lower hole section 322. The upper hole section 321 is located above the exhaust channel 31, and the lower hole section 322 is located below the exhaust channel 31. The bottom of the lower hole section 322 is connected to the outside. , and the inner wall of the lower hole section 322 is provided with a second annular inclined surface 3221, and the second annular inclined surface 3221 is used to abut with the first annular inclined surface 41. Among them, the bottom of the lower hole section 322 is connected to the outside so that when the movable ejector pin 4 moves downward, the end of the movable ejector pin 4 will not squeeze the liquid glue, thereby preventing the liquid glue from adhering to the inner wall of the exhaust channel 31 and easily causing blockage. Furthermore, when the bottom of the lower hole section 322 is open, the contact structure of the first annular slope 41 and the second annular slope 3221 is used to effectively increase the contact area, achieve a better sealing effect, and prevent liquid glue from passing through the lower hole section 322 The bottom of the glue leaks outward. At the same time, the inclined plane structure is adopted. Even when the liquid glue solidifies on the inclined plane, it will easily fall off under the multiple impacts of the moving thimble 4 and pass through the lower hole section 322 along the guide of the inclined plane. The bottom slides away.

Among them, the inner wall of the upper hole section 321 is provided with a third annular slope 3213, and the surface of the movable ejector pin 4 is provided with a fourth annular slope 42. The fourth annular slope 42 is used to abut the third annular slope 3213. In this way, through the third The annular inclined surface 3213 and the fourth annular inclined surface 42 abut each other to form a stroke limit for the movement of the movable ejector pin 4 .

Among them, at least two first annular grooves 3212 are provided, and the at least two first annular grooves 3212 are arranged up and down. In this embodiment, two first annular grooves 3212 are provided to improve the sealing effect.

Among them, the exhaust channel 31 has an inlet end, and the switch base 3 is provided with a second annular groove 6 surrounding the inlet end, and a second sealing ring is provided in the second annular groove 6. In this way, through the second sealing ring provided, When the switch base 3 is installed on the gland 200, a sealing effect is formed.

Among them, the switch base 3 is also provided with at least one mounting hole 7 , and at least one mounting hole 7 is arranged parallel to the exhaust channel 31 . In this way, the switch base 3 can be locked on the gland 200 through the mounting hole 7 .

Among them, as shown in Figures 1-2 and 8-10, the present utility model also has a hot melt glue machine 100, which includes a gland 200 and an exhaust switch valve as mentioned above. The switch seat 3 is arranged on the gland 200. . In this way, the hot melt glue machine 100 with an exhaust switch valve is provided with an installation channel 32 for cutting off the exhaust channel 31, and is provided with a movable ejector pin 4 for blocking the exhaust channel 31 in the installation channel 32, so as to utilize The screw-connected structure drives the movable ejector pin 4 to move up and down to block or open the exhaust channel 31, thereby opening or closing the exhaust switch valve. At the same time, the first sealing ring 5 is also provided for sealing protection. To avoid failure of the screw joint structure. It adopts different blocking and opening methods, which changes the problem that when the faucet 11 structure is used in the past, liquid glue is easy to condense in the hole of the ball valve and cause blockage. In addition, with the above structure, the operation force is relatively smaller and the operation is more convenient than when using the faucet 11 structure.

Among them, the hot melt glue machine 100 also includes a drive motor located above the gland 200. The driving end of the drive motor and the gland 200 are connected through the universal coupling transmission assembly 8. In this way, by using the universal coupling The installation structure reduces the requirements for shaft concentricity between the drive motor and the gland 200 during installation, thereby effectively reducing the difficulty of installation.

Among them, the gland 200 is also provided with a valve body 9 having a cavity inside. The bottom of the valve body 9 is provided with a return port connected to the cavity, and the side wall of the valve body 9 is provided with a discharge port connected to the cavity. , the top of the valve body 9 is connected to an adjusting nut, and the bottom end of the adjusting nut extends into the cavity; a valve core 10 is provided inside the cavity to block the return port, and an elastic member is provided between the valve core 10 and the adjusting nut. The pressure member, and a return groove 101 is provided on the side wall of the valve core 10. The return groove 101 shrinks from the bottom of the valve core 10 to the top of the valve core 10; when the valve core 10 squeezes the elastic pressure member to rise When the reflux port is opened, the reflux port is connected with the discharge port through the reflux groove 101. In this way, by providing an adjusting nut and an elastic pressure member on the valve core 10 and providing a return groove 101 on the side wall of the valve core 10, the corresponding position of the return groove 101 and the discharge port can be adjusted by the adjusting nut to utilize the return flow. The groove 101 has the characteristics of shrinking and changing, which realizes the adjustment and control of the return flow in the pressure relief return valve.

The cross section of the reflow tank 101 is triangular or inverted trapezoidal. The triangular structure makes it easier to process the equipment and reduces the difficulty of processing.

The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims (10)

1. An exhaust switch valve is characterized by comprising a switch seat, wherein an exhaust channel and a mounting channel which is communicated with the exhaust channel and cuts off the exhaust channel are respectively arranged in the switch seat;

the inner wall of the installation channel is provided with a thread groove and a first annular groove from top to bottom above the exhaust channel, a movable thimble for sealing the exhaust channel is screwed in the thread groove, and a first sealing ring for forming sealing fit with the surface of the movable thimble is arranged in the first annular groove.

2. The exhaust switching valve according to claim 1, wherein an end portion of the movable needle is tapered such that a first annular inclined surface is formed on the movable needle;

the installation channel comprises an upper hole section positioned above the exhaust channel and a lower hole section positioned below the exhaust channel, the bottom of the lower hole section is communicated with the outside, and the inner wall of the lower hole section is provided with a second annular inclined surface which is used for being abutted with the first annular inclined surface.

3. The exhaust switching valve according to claim 2, wherein the inner wall of the upper hole section is provided with a third annular inclined surface, and the surface of the movable ejector pin is provided with a fourth annular inclined surface for abutting against the third annular inclined surface.

4. The exhaust switching valve according to claim 1, wherein at least two of the first annular grooves are provided, and at least two of the first annular grooves are arranged one above the other.

5. The exhaust switching valve according to claim 1, wherein the exhaust passage has an inlet end, a second annular groove is provided on the switching seat around the inlet end, and a second seal ring is provided in the second annular groove.

6. The exhaust switching valve according to claim 1, wherein the switching seat is further provided with at least one mounting hole, at least one of the mounting holes being disposed in parallel with the exhaust passage.

7. A hot melt adhesive machine comprising a pressing cover and the exhaust switching valve according to any one of claims 1 to 6, the switching seat being provided on the pressing cover.

8. The hot melt adhesive machine of claim 7, further comprising a drive motor positioned above the gland, wherein the drive end of the drive motor is coupled to the gland by a universal coupling drive assembly.

9. The hot melt adhesive machine according to claim 7, wherein the gland is further provided with a valve body with a cavity inside, a backflow port communicated with the cavity is arranged at the bottom of the valve body, a discharge port communicated with the cavity is arranged on the side wall of the valve body, an adjusting nut is connected to the top of the valve body in a switching mode, and the bottom end of the adjusting nut extends into the cavity;

a valve core which is blocked on the reflux port is arranged in the cavity, an elastic pressing piece is arranged between the valve core and the adjusting nut, a reflux groove is arranged on the side wall of the valve core, and the reflux groove is changed in a shrinking manner from the bottom of the valve core to the top of the valve core;

when the valve core presses the elastic pressing piece to lift and open the backflow port, the backflow port is communicated with the discharge port through the backflow groove.

10. The hot melt adhesive machine according to claim 9, wherein the cross section of the return groove is triangular or inverted trapezoidal.