CN216242524U - Frameless hydraulic main valve - Google Patents

Abstract

The utility model discloses a frameless hydraulic main valve which comprises a main valve body, a valve cover, a main valve cavity formed by assembling the main valve body and the valve cover, wherein the top of the main valve body is provided with a valve port, the valve cover is arranged above the valve port, a separation diaphragm for separating the main valve cavity into an upper control chamber and a lower intercepting cavity is arranged in the main valve cavity, the cavity wall at the bottom of the intercepting cavity is provided with an intercepting convex part, the separation diaphragm is of a bowl-shaped structure, the top end of the intercepting convex part is propped against the bowl bottom of the bowl-shaped structure, the intercepting convex part divides the intercepting cavity into a liquid inlet cavity at the left side and a liquid outlet cavity at the right side, the outer side surface of the separation diaphragm is sleeved with a leakage hole ring cone supporting wall for supporting the bowl-shaped structure, and the leakage hole ring cone supporting wall is composed of a cone ring wall and a supporting wall top edge ring. Has the advantages that: the valve body has the advantages of light and small structure, low cost, high production efficiency and better service performance.

Description

A skeletonless hydraulic main valve

technical field

The utility model relates to the field of valve devices, in particular to a frameless hydraulic main valve.

Background technique

The hydraulic control valve has the function of automatically opening and closing the valve pipeline by using the pressure of the pipeline itself to control the liquid level, pressure, temperature, flow rate, etc. , is widely used in the pipeline transportation system of various normal temperature and pressure liquids in industrial and mining enterprises and civil buildings;

However, the current cut-off component of the internal shut-off cavity of the hydraulic control valve usually adopts the linkage of the skeleton, the valve stem, the diaphragm and its clamping plate assembly to realize the on-off of the shut-off cavity, and its internal structure is relatively complicated. It works through the liquid pressure difference between the control chamber and the interception cavity, and the liquid will generate unstable hedging pressure during the flow process. The unstable hedging force applied to the linked clamping plate will change its original motion inertia, resulting in the clamping plate and The hedging or reverse mutual pulling of the relevant spool components and other rigid structures causes the spool to move and resonate, which causes great damage to the spool components, affects the internal operating environment of the valve body and damages the pipeline. , and there are many internal components, relatively large production consumables, high production cost and low efficiency.

Utility model content

The purpose of this utility model is to provide a frameless hydraulic main valve in order to solve the above problems.

The utility model realizes the above-mentioned purpose through the following technical solutions:

A skeletonless hydraulic main valve, comprising a main valve body, a valve cover, a main valve valve cavity formed by assembling the main valve body and the valve cover, the top of the main valve body is provided with a valve port, and the valve The cover is installed above the valve port, the main valve cavity is provided with a separation membrane for dividing the main valve cavity into an upper control chamber and a lower interception cavity, and the bottom cavity wall of the interception cavity is provided with a diaphragm. There are intercepting convex parts, the separating diaphragm is a bowl-shaped structure, the top of the intercepting convex part is pressed against the bowl bottom of the bowl-shaped structure, and the intercepting convex part divides the intercepting cavity into the inlet on the left side. The liquid cavity and the liquid outlet cavity on the right side, the outer side of the separation membrane is sleeved with a leak hole ring cone support wall for supporting the outer bowl wall of the bowl-shaped structure, and the leak hole ring cone support wall is on the A number of water leakage holes are provided, and a diaphragm limit chassis for limiting the position of the bowl bottom of the bowl-shaped structure is placed at the bottom of the inner side of the separation diaphragm. A positioning hole, a diaphragm limiting convex column is arranged in the limiting hole, the diaphragm limiting convex column is integrally connected with the separating diaphragm, and a compression spring is supported on the diaphragm limiting chassis. , the top of the compression spring is pressed against the bottom surface of the valve cover.

Further, the top of the leak hole ring cone support wall is provided with a support wall top edge ring, the inner port wall of the valve port is provided with a valve inner ring convex portion, and the inner ring surface of the valve inner ring convex portion is provided. There is a support wall along the bearing ring convex portion, the top of the support wall is press-fitted to the support wall along the support ring convex portion along the ring, the top of the ring convex portion in the valve body is supported and placed with a diaphragm edge ring, the The diaphragm is integrally connected with the separating diaphragm along the ring. The bottom of the cover body of the valve cover is provided with a cover body crimping ring convex portion, and the cover body crimping ring convex portion is press-fitted to the diaphragm edge. on the ring.

Further, the inner port wall of the valve port is provided with a valve inner ring convex portion, and a diaphragm edge ring is pressed on the valve inner ring convex portion, and the diaphragm edge ring is integrally connected with the separation diaphragm. Together, the cover bottom of the valve cover is provided with a cover crimping ring convex portion, the cover crimping ring convex portion is crimped on the diaphragm edge ring, and the leak hole ring cone support wall passes through The hook is hung on the ring convex part of the valve body.

Further, the inner port wall of the valve port is provided with a valve inner ring convex portion, and a diaphragm edge ring is pressed on the valve inner ring convex portion, and the diaphragm edge ring is integrally connected with the separation diaphragm. At the same time, the bottom of the cover body of the valve cover is provided with a cover body crimping ring convex part, the cover body crimping ring convex part is press-fitted on the diaphragm edge ring, and the leak hole ring cone bracket is wall-mounted Attached to the outer membrane wall of the separating membrane.

Further, a guide wall is installed on the top of the cavity of the liquid inlet chamber, and the end of the guide wall is pressed against the bottom of the separation diaphragm, and both ends of the main valve body are provided with Mounting flange for pipe connection.

Further, a control chamber liquid inlet pipe is also connected and installed between the control chamber and the liquid inlet chamber, and a regulating valve for regulating the flow rate is installed on the control chamber liquid inlet pipe, and the control chamber also exits through the control chamber. The liquid line is connected with a pilot valve.

Further, the installation flanges at both ends of the main valve body are respectively connected and installed with upstream pipelines and downstream pipelines, and the pilot valves include but are not limited to floating ball valves, pressure reducing valves, overpressure relief valves, and electromagnetic control valves. a kind of.

Further, the wall of the conical support of the leak hole ring adopts a metal support piece made by stamping, forging process or conjoined casting.

In the above structure, in the non-use state, there is no fluid other than air in the shut-off cavity and the control chamber. Under the action of the compression spring, the membrane layer at the bottom of the diaphragm is pressed to the end of the guide wall and the shut-off convex portion. the top of , the shut-off cavity is in a cut-off state at this time;

When there is liquid flowing into the liquid inlet cavity, the liquid will press the bottom of the separation diaphragm under the limiting action of the guide wall and the intercepting convex part, forming an upward pressure, and the compression spring will deform under the action of the upward pressure. At this time, the liquid inlet chamber and the liquid outlet chamber form a communication channel. At this time, the liquid in the liquid inlet chamber also flows into the control chamber through the liquid inlet pipe of the control chamber, and the liquid in the control chamber is also discharged through the liquid outlet pipe of the control chamber. The diaphragm is simultaneously subjected to the upward hydraulic pressure and the downward pressure to form a pressure difference, and the membrane layer at the bottom of the separation diaphragm continues to move upward until there is no pressure difference between the upper and lower parts of the separation diaphragm, and the communication channel between the liquid inlet chamber and the liquid outlet chamber is stable. The bottom film layer of the diaphragm moves up and the side film layer shrinks, and part of the leakage hole is leaked out of the ring cone support wall. The liquid in the liquid inlet chamber flows through the communication channel, and part of the liquid enters the liquid outlet chamber through the water leakage hole, thereby improving the performance of the diaphragm. When the pilot valve is closed, the hydraulic pressure in the control chamber increases, the bottom membrane layer moves down under the pressure of the separating diaphragm, and the side membrane layer stretches elastically, and the interception chamber is blocked again.

The beneficial effects are:

1. Instead of the rigid linkage structure of the traditional liquid level control valve, it avoids the spool movement and resonance caused by the unstable hedging force applied to the rigid structure such as the splint and related spool components, which greatly reduces the hedging. The force applied to the linkage splint and the valve core assembly changes the destructive force caused by its original motion inertia, which ensures the stability of the internal operating environment and the long-term use of the pipeline reduces noise and increases its service life;

2. Compared with the currently known liquid level control valve, its volume is smaller, the applicable installation position is wider, and the practicability is stronger;

3. It greatly saves the material and production costs of the enterprise, reduces waste, shortens the production and assembly time, and doubles the production efficiency;

4. Strong overcurrent capability, through the support structure with holes, the damage caused by water pressure to the diaphragm is reduced, and the service performance of the valve body is improved.

Description of drawings

FIG. 1 is a schematic structural diagram of Embodiment 1 of a skeletonless hydraulic main valve according to the present invention;

Figure 2 is an enlarged schematic view of the B structure of a skeletonless hydraulic main valve according to the present invention;

Fig. 3 is the schematic diagram of the leak hole ring cone support wall of the frameworkless hydraulic main valve according to the present invention;

Figure 4 is a schematic diagram of the inlet and outlet pipe assemblies of the control chamber of a frameless hydraulic main valve according to the present invention;

5 is a schematic diagram of the liquid level control valve described in the comparative example of the present utility model;

6 is a schematic structural diagram of Embodiment 2 of the frameworkless hydraulic main valve of the present invention;

7 is an enlarged schematic view of the structure C of a skeletonless hydraulic main valve according to the present invention;

FIG. 8 is a schematic structural diagram of Embodiment 3 of a skeletonless hydraulic main valve according to the present invention.

The reference numerals are explained as follows:

1. Main valve body; 2. Valve cover; 3. Separation diaphragm; 4. Cone support wall of leakage hole ring; 41. Water leakage hole; 42. Top edge ring of support wall; 6. Compression spring; 7. Diaphragm limiting protrusion; 8. Liquid inlet chamber; 9. Liquid outlet chamber; 10. Control room; 11. Diversion wall; 12. Shut-off protrusion; 13. Installation flange; 14. Ring convex part of valve body; 15. Diaphragm edge ring; 16. Cover crimping ring convex part; 17. Main valve body A; 18. Valve cover A; 19. Control room A; 20. Liquid inlet chamber A; 21, liquid outlet chamber A; 22, water blocking wall A; 23, valve seat; 24, valve seat sealing film; 25, I-shaped frame; 26, separation diaphragm A; 27, compression spring A; 28, valve rod; 29, the upper pressure plate; 30, the convex part of the film limit ring; 31, the supporting wall along the convex part of the bearing ring.

Detailed ways

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "horizontal", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility. The novel and simplified description does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second", etc., may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

Below in conjunction with accompanying drawing, the utility model is further described:

Example 1

Referring to a frameless hydraulic main valve shown in Figures 1-4, the frameless hydraulic main valve is assembled by a main valve body 1, a valve cover 2, a main valve body 1 and a valve cover 2 to form an internal container The main valve cavity of the valve member is composed;

The top of the main valve body 1 is provided with a valve port, the valve cover 2 is installed above the valve port, and the main valve cavity is provided with a valve cavity for dividing the main valve cavity into an upper control chamber 10 and a lower shut-off. The separation diaphragm 3 of the cavity, the bottom cavity wall of the shut-off cavity is provided with a shut-off convex portion 12, the separation diaphragm 3 is a bowl-shaped structure, and the top of the shut-off convex portion 12 is pressed against the bottom of the bowl-like structure, and the flow is shut off. The convex portion 12 divides the shut-off cavity into the liquid inlet cavity 8 on the left and the liquid outlet cavity 9 on the right;

The outer side of the separation diaphragm 3 is sleeved with a leak hole ring cone support wall 4 for supporting the outer bowl wall of the bowl-shaped structure, and the leak hole ring cone support wall 4 can limit the radial deformation of the separation diaphragm 3 under pressure and expansion. A number of water leakage holes 41 are arranged on the leakage hole ring cone support wall 4 for increasing the cross-sectional area of the water passage channel of the interception cavity and improving its flow capacity;

A diaphragm limiting chassis 5 for limiting the position of the bowl bottom of the bowl-shaped structure is placed at the bottom of the inner side of the separating diaphragm 3, and a limiting hole is provided at the center of the disk of the diaphragm limiting chassis 5. There is a diaphragm limiting convex column 7, and the diaphragm limiting convex column 7 is integrally connected with the separating diaphragm 3;

A compression spring 6 is supported on the diaphragm limiting chassis 5 , and the top of the compression spring 6 is pressed against the bottom surface of the valve cover 2 .

In this embodiment, the top of the leak hole ring cone support wall 4 is provided with a support wall top edge ring 42, the inner port wall of the valve port is provided with a valve inner ring convex portion 14, and the inner portion of the valve inner ring convex portion 14 is provided. There is a support wall along the bearing ring convex portion 31 on the annular surface, the top of the support wall is pressed on the support wall along the bearing ring convex portion 31 along the ring 42, and the top of the ring convex portion 14 in the valve body is supported and placed with a diaphragm along the ring 15, The diaphragm is integrally connected with the separating diaphragm 3 along the ring 15 . The bottom of the cover body of the valve cover 2 is provided with a cover body crimping ring convex portion 16 , and the cover body crimping ring convex portion 16 is pressed to the diaphragm along the ring 15 . .

In this embodiment, a guide wall 11 is installed on the top of the liquid inlet chamber 8, and the end of the guide wall 11 is pressed against the bottom of the separation membrane 3, and both ends of the main valve body 1 are provided with Mounting flange 13 for pipe connection.

In this embodiment, a control chamber liquid inlet pipe is also connected and installed between the control chamber 10 and the liquid inlet chamber 8, and a regulating valve for regulating the flow rate is installed on the control chamber liquid inlet pipe, and the control chamber 10 is also controlled by The chamber outlet pipe is connected with a pilot valve.

Preferably, the installation flanges 13 at both ends of the main valve body 1 are respectively connected to the upstream pipeline and the downstream pipeline, and the pilot valve includes but is not limited to a float valve, a pressure reducing valve, an overpressure relief valve, and an electromagnetic control valve. one of the

When the pilot valve uses the floating ball valve, the downstream pipeline is connected with a liquid storage device, and the floating ball valve is placed in the liquid storage device and floats on the liquid surface;

When the pilot valve uses the pressure reducing valve, the other end of the pilot valve is connected to the liquid outlet chamber or the downstream pipe through a pipeline;

When the electromagnetic control valve and the overpressure relief valve are used, the other end of the pilot valve is connected to the liquid outlet chamber or the downstream pipe and the atmosphere through a pipeline, and is connected to the atmosphere, that is, the other end of the pilot valve The valve port is placed in the air.

In this embodiment, the leak hole ring cone support wall 4 is a metal support piece, which is made by stamping, forging process or conjoined casting.

The working process and principle of this embodiment are as follows:

In the non-use state, there is no fluid except air in the shut-off cavity and the control chamber. Under the action of the compression spring, the membrane layer at the bottom of the diaphragm 3 is pressed to the end of the guide wall 11 and the shut-off convex portion 12. the top, and the shut-off cavity is in a cut-off state at this time;

When there is liquid flowing into the liquid inlet chamber 8, the liquid will press the bottom of the separation diaphragm 3 under the limiting action of the guide wall 11 and the intercepting convex portion 12 to form an upward pressure, and the compression spring 6 will press upward. At this time, the liquid inlet chamber 8 and the liquid outlet chamber 9 form a communication channel. At this time, the liquid in the liquid inlet chamber 8 also flows into the control chamber 10 through the liquid inlet pipe of the control chamber, and the liquid in the control chamber 10 is simultaneously It is also discharged through the liquid outlet pipe of the control chamber. The separation diaphragm 3 is simultaneously subjected to the upward hydraulic pressure and the downward pressure to form a pressure difference. The communication channel between the liquid chamber 8 and the liquid outlet chamber 9 is stable. At the same time, the bottom membrane layer of the separation membrane 3 moves up and the side membrane layer shrinks, and part of the leakage hole ring cone support wall 4 leaks out, and the liquid in the liquid inlet chamber 8 passes through the communication The flow channel flows, and part of the liquid enters the liquid outlet chamber 9 through the water leakage hole 43, thereby improving the flow capacity of the water flow channel. When the pilot valve is closed, the hydraulic pressure in the control chamber 10 increases, and the separation diaphragm 3 is in the Under the action of pressure, the bottom membrane layer is moved down, and the side membrane layer is stretched elastically, and the interception cavity is closed again.

Example 2

Referring to a frameless hydraulic main valve shown in FIGS. 6-7 , the difference between it and Embodiment 1 is that the inner port wall of the valve port is provided with a valve body ring convex portion 14 , and the valve body ring convex portion 14 is provided on the inner side port wall of the valve port. A diaphragm edge ring 15 is pressed, and the diaphragm edge ring 15 is integrally connected with the separation diaphragm 3. The bottom of the cover body of the valve cover 2 is provided with a cover body crimping ring convex portion 16, and the cover body crimping ring convex portion 16 Pressed on the diaphragm edge ring 15, the leak hole ring cone support wall 4 is hung on the ring convex part 14 of the valve body through a hook;

Except for the above structure, the structure in this embodiment is the same as the structure and principle in Embodiment 1.

Example 3

Referring to a frameless hydraulic main valve shown in FIG. 8 , the difference between it and Embodiment 1 is that the inner port wall of the valve port is provided with a valve body ring convex portion 14 , and the valve body ring convex portion 14 is press-fitted. There is a diaphragm along the ring 15, and the diaphragm is integrally connected with the separation diaphragm 3 along the ring 15. The bottom of the cover body of the valve cover 2 is provided with a cover body crimping ring convex portion 16, and the cover body crimping ring convex portion 16 is press-fitted On the diaphragm edge ring 15, the leak hole ring cone support wall 4 is attached to the outer diaphragm wall of the separation diaphragm 3;

Except for the above structure, the structure in this embodiment is the same as the structure and principle in Embodiment 1.

The structures described in the above three embodiments are applicable to fluids that can generate a pressure difference between the shut-off cavity and the control chamber, and the connection method of the leak hole ring cone support wall 4 is not limited by the above embodiments, and the above embodiments are only illustrative. The principle of its connection and installation will have various changes and improvements without departing from the scope of protection of the utility model.

Comparative ratio

Referring to the liquid level control valve shown in FIG. 5 , it includes a valve cavity formed by assembling the main valve body A17 and the valve cover A18 together. The valve cavity is provided with a diaphragm limit ring convex portion 30 . The diaphragm limit ring convex portion A separation diaphragm A26 is supported and installed on the upper part of the separation diaphragm A26, and the separation diaphragm A26 separates the valve cavity into an upper control chamber A19 and a lower shut-off chamber A. The lower part of the separation diaphragm A26 is supported and installed with an I-shaped frame 25, and the I-shaped frame 25 A valve stem 28 is installed vertically at the center of the valve, a valve seat 23 is installed on the valve stem 28 under the I-shaped frame 25, and a valve seat sealing film is sandwiched between the top of the valve seat 23 and the I-shaped frame 25 24. An upper pressure plate 29 is arranged above the separation diaphragm A26, a compression spring A27 is supported on the upper pressure plate 29, and a water blocking wall A22 is installed in the shut-off cavity A. The interception chamber A is divided into the left liquid inlet chamber A20 and the right liquid outlet chamber A21;

The liquid level control valve described in this comparative example is also equipped with a differential pressure fitting. For the differential pressure fitting, reference may be made to the control chamber liquid inlet pipe, the control chamber liquid outlet pipe and their related corresponding pipe valves in the embodiment.

By comparing the structural principles of the embodiment and the comparative example, it can be seen that the frameless hydraulic main valve described in this embodiment has great advantages:

First of all, compared with the liquid level control valve described in the comparative example, the hydraulic main valve in this embodiment is provided without a bone, and is provided by a holed leak hole ring cone support wall 4, which replaces the skeleton and valve stem in the traditional structure. Structure and components such as multiple diaphragm splints, the leak hole ring cone support wall has a great advantage over the traditional structure, it itself has a bearing effect on the separation diaphragm 3, and it limits the degree of radial deformation and constraints of the diaphragm expansion under pressure In the axial extension direction, under the action of the liquid pressure, the diaphragm is restrained by the hole of the bracket along the wall, so as to avoid the rupture of the diaphragm due to the large deformation of some parts of the diaphragm due to the excessive liquid pressure. Strong overcurrent capability, compared with the traditional skeleton and valve stem installation method and installation structure, it is more convenient to replace the leakage hole ring cone support wall and the entrusted diaphragm;

Secondly, the closure linkage structure of this embodiment is different from the rigid linkage generated by the skeleton and the valve stem in the comparative example. It removes the rigid linkage in the traditional structure, reduces the noise, reduces the rigid collision during use, and is also conducive to extending the its service life;

Furthermore, from the perspective of volume, the valve stem, skeleton and their attached limiting structures in the comparative example greatly increase the volume of the valve body and the valve cavity. This embodiment can maximize the flow rate under the premise of ensuring Reduce the volume of the valve body, make it lighter, and have more and wider applications;

Finally, from the perspective of its production cost and assembly process, the hydraulic main valve in this embodiment saves a lot of production materials, shortens the assembly time, and greatly improves its production efficiency.

The basic principles, main features and advantages of the present invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention There will also be various changes and improvements in the new model, which all fall within the scope of the claimed invention. The claimed scope of the utility model is defined by the appended claims and their equivalents.

Claims (8)

1. A frameless hydraulic main valve, characterized in that: the valve comprises a main valve body, a valve cover, a main valve cavity formed by assembling the main valve body and the valve cover, wherein the top of the main valve body is provided with a valve port, the valve cover is arranged above the valve port, the main valve cavity is internally provided with a separation diaphragm for separating the main valve cavity into an upper control chamber and a lower intercepting cavity, the bottom cavity wall of the intercepting cavity is provided with an intercepting convex part, the separation diaphragm is of a bowl-shaped structure, the top end of the intercepting convex part is pressed against the bowl bottom of the bowl-shaped structure, the intercepting convex part divides the intercepting cavity into a left liquid inlet cavity and a right liquid outlet cavity, the outer side surface of the separation diaphragm is sleeved with a leakage hole ring cone supporting wall for bearing and supporting the bowl wall outside the bowl-shaped structure, the leakage hole ring cone supporting wall is provided with a plurality of water leakage holes, and the inner bottom of the separation diaphragm is provided with a diaphragm limiting chassis for limiting the bowl bottom of the bowl-shaped structure, the diaphragm limiting base plate is characterized in that a limiting hole is formed in the center of the diaphragm limiting base plate, a diaphragm limiting convex column is arranged in the limiting hole and integrally connected with the separation diaphragm, a compression spring is supported on the diaphragm limiting base plate, and the top of the compression spring is pressed against the bottom surface of the valve cover.

2. The frameless hydraulic main valve according to claim 1, wherein: the top of the support wall of the leak hole annular cone is provided with a support wall top edge ring, the inner side opening wall of the valve port is provided with a valve body inner ring convex part, the inner ring surface of the valve body inner ring convex part is provided with a support wall edge bearing ring convex part, the top of the support wall is arranged on the support wall edge bearing ring convex part in a pressing mode along the ring, the top of the valve body inner ring convex part supports and is provided with a diaphragm edge ring, the diaphragm edge ring is integrally connected with the separation diaphragm, the bottom of the cover body of the valve cover is provided with a cover body pressing ring convex part, and the cover body pressing ring convex part is arranged on the diaphragm edge ring in a pressing mode.

3. The frameless hydraulic main valve according to claim 1, wherein: the inner side opening wall of the valve opening is provided with a valve body inner ring convex part, a diaphragm edge ring is arranged on the valve body inner ring convex part in a pressing mode, the diaphragm edge ring and the separation diaphragm are integrally connected together, a cover body pressing ring convex part is arranged at the bottom of the cover body of the valve cover, the cover body pressing ring convex part is arranged on the diaphragm edge ring in a pressing mode, and the cone supporting wall of the leakage hole ring is hung on the valve body inner ring convex part through a hook.

4. The frameless hydraulic main valve according to claim 1, wherein: the inner side port wall of the valve port is provided with a valve body inner ring convex part, a diaphragm edge ring is arranged on the valve body inner ring convex part in a pressing mode, the diaphragm edge ring and the separating diaphragm are integrally connected together, a cover body pressing ring convex part is arranged at the bottom of the cover body of the valve cover, the cover body pressing ring convex part is arranged on the diaphragm edge ring in a pressing mode, and the leakage hole ring cone supporting wall is attached to and installed on the outer side diaphragm wall of the separating diaphragm.

5. The frameless hydraulic main valve according to claim 1, wherein: the top of the cavity of the liquid inlet cavity is provided with a flow guide wall, the tail end of the flow guide wall is pressed against the bottom of the separating diaphragm, and two ends of the valve body of the main valve are provided with mounting flange plates for connecting pipelines.

6. A frameless hydraulic main valve according to claim 3, wherein: the control room with still connect between the feed liquor chamber and install control room feed liquor pipe, install the governing valve that is used for regulating and control flow size on the control room feed liquor pipe, the control room still is connected with the guide valve through the control room drain pipe.

7. The frameless hydraulic main valve according to claim 4, wherein: the installing flange plates at two ends of the main valve body are respectively connected with an upstream pipeline and a downstream pipeline, and the guiding valve comprises but is not limited to one of a ball float valve, a pressure reducing valve, an overpressure relief valve and an electromagnetic control valve.

8. The frameless hydraulic main valve according to claim 1, wherein: the annular cone supporting wall of the leak hole adopts a metal supporting piece.

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