Valve with long service life and manufacturing process thereof

Abstract

The valve comprises a valve body, an inlet pipe is arranged on one side of the valve body, a discharge pipe is arranged on the other side of the valve body, a valve seat is arranged at the top end in the valve body, and a sealing gasket is supported on the edge of the inner wall of the valve body at the top end of the valve seat. A diaphragm is arranged at the top end of the sealing gasket, a pressing ring is connected to the top end of the diaphragm in a pressed mode, a locking sleeve connected with the valve body is connected to the top end of the pressing ring in a sleeved mode, a pneumatic actuator is installed at the top end of the locking sleeve, a pressure piston is installed at the bottom end of the pneumatic actuator, a sliding block is installed at the bottom end of the pressure piston, and the sliding block is arranged at the top end of the diaphragm. A through opening is formed in the middle of the valve body and communicates with the inlet pipe, and a valve seat is arranged on the outer side of the top end of the through opening in an interference fit mode. The diaphragm used in the valve adopts a special manufacturing process, and the service life of the diaphragm is prolonged, so that the service life of the valve can be prolonged, and the service life can reach more than 4,000,000 times.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and more particularly to a valve with a long service life and a manufacturing process thereof. Background Art

[0002] The opening and closing part of the diaphragm valve is a diaphragm, which separates the inner cavity of the lower valve body from the inner cavity of the upper cylinder or valve cover, so that the valve stem, valve disc and other parts above the diaphragm are not corroded by the medium, and have the advantage of no leakage of the medium.

[0003] After the diaphragm valve is installed, the height of the diaphragm and the valve seat needs to be controlled at 0.5±0.05mm, that is, in addition to other parts, the production of the diaphragm needs to control the height, curvature and other requirements. If the diaphragm height is too high, the life of the valve will be reduced. If the diaphragm height is too low, the flow rate of the valve will be reduced, and the CV value requirement will not be met. At the same time, it will also affect the service life of the diaphragm. Therefore, a valve with a long service life and its manufacturing process are proposed. Summary of the invention

[0004] In order to overcome the above defects of the prior art, the present invention provides a valve with a long service life and a manufacturing process thereof to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a valve with a long service life, a valve with a long service life, comprising a valve body, an inlet pipe is arranged on one side of the valve body, an outlet pipe is arranged on the other side of the valve body, a valve seat is arranged on the top end of the inner part of the valve body, a sealing gasket is supported on the edge of the inner wall of the valve body at the top end of the valve seat, a diaphragm is arranged on the top end of the sealing gasket, a clamping ring is crimped on the top end of the diaphragm, a locking sleeve connected to the valve body is sleeved on the top end of the clamping ring, a pneumatic actuator is installed on the top end of the locking sleeve, a pressure piston is installed on the bottom end of the pneumatic actuator, a slider is installed on the bottom end of the pressure piston, and the slider is arranged on the top end of the diaphragm.

[0006] Preferably, a through opening is opened in the middle of the valve body, the through opening is connected to the inlet pipe, a valve seat is interference fit on the outer side of the top end of the through opening, an annular overflow groove is formed between the outer side of the valve seat and the valve body, and the annular overflow groove is connected to the discharge pipe.

[0007] Preferably, the height of the diaphragm is 0.8 mm, and the tolerance range is -0.1 to 0 mm.

[0008] A diaphragm manufacturing device comprises an upper pressure seat, a clamping block, an upper deformable body, a lower deformable body and a lower base, wherein a clamping block is arranged at the top end of the lower base, a lower deformable body is arranged in the middle of the clamping block, an upper deformable body is crimped to the top edge of the lower deformable body, an upper pressure seat is inserted into the top end of the upper deformable body, and the upper pressure seat and the clamping block are slidably matched.

[0009] Preferably, a mold groove is provided in the middle of the top end of the lower base, and an exhaust hole is provided at the bottom of the mold groove.

[0010] Preferably, both sides of the mold groove are in a stepped structure, and the bottom of the clamping block is plugged into and matched with the stepped structure.

[0011] Preferably, a bracket is provided in the middle of the clamping block, a support platform is provided in an annular shape at the top of the bracket, the lower deformation body is inserted into the bracket, and the upper deformation body is pressed onto the support platform.

[0012] Preferably, a spacing of 2.5 mm is provided at the connection between the pressing block and the edge of the upper pressing seat.

[0013] A diaphragm manufacturing process comprises the following steps:

[0014] S1: First, place the diaphragm raw material on the top of the mold groove opened inside the lower base, and then install the pressing block to press the edge of the diaphragm raw material;

[0015] S2: Then, the lower deformable body is inserted into the bracket opened in the middle of the pressing block, so that the bottom of the lower deformable body is connected to the diaphragm raw material, and then the upper deformable body is placed on the supporting platform, so that the upper deformable body is annularly pressed against the edge of the lower deformable body;

[0016] S3: Insert the bottom end of the upper press seat into the upper deformation body, so that the bottom end of the upper press seat is connected to the top of the lower deformation body, and at the same time, the distance between the clamping block and the edge of the upper press seat is exactly 2.5mm;

[0017] S4: Finally, the upper deformation body is compressed by pressing down the upper pressure seat, and at the same time, the lower deformation body squeezes the diaphragm raw material into the mold groove, and the air at the bottom of the diaphragm raw material is discharged from the exhaust hole, so that the diaphragm raw material is extruded and formed to form a diaphragm with a height of 0.8mm and a tolerance range of -0.1 to 0mm.

[0018] Preferably, the middle part of the diaphragm formed by extrusion of the diaphragm raw material is a semicircular arch structure, and the edge forms a horizontal ring piece. The outer diameter of the horizontal ring piece is 22mm, with a tolerance of -0.1 to 0mm. The outer diameter of the semicircular arch structure is 18.6mm, with a tolerance of -0.1 to 0.1mm. The center radius of the semicircular arch structure is 64.5mm. The chamfer radius of the connection between the semicircular arch structure and the horizontal ring piece is 0.5mm, and the thickness of the horizontal ring piece is 0.127mm.

[0019] Technical effects and advantages of the present invention:

[0020] The grinding disc processing device provided by the present invention can increase the service life of the diaphragm in conjunction with the processing technology, and after testing, the service life is as long as more than 40 million times, so when it is installed on the valve provided by the present invention for use, the service life of the valve can be further increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the valve of the present invention.

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the valve bottom of the present invention.

[0023] Figure 3 It is a schematic diagram of the connection structure between the diaphragm and the sealing gasket of the present invention.

[0024] Figure 4 It is a schematic structural diagram of the membrane processing device of the present invention.

[0025] Figure 5 It is a schematic diagram of the diaphragm size process of the present invention.

[0026] The accompanying drawings are marked as follows: 1. valve body; 2. inlet pipe; 3. outlet pipe; 4. locking sleeve; 5. pneumatic actuator; 6. pressure piston; 7. valve seat; 8. sealing gasket; 9. diaphragm; 10. clamping ring; 11. slider. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] As attached Figure 1-3 A valve with a long service life and a manufacturing process thereof are shown. A valve with a long service life includes a valve body 1, an inlet pipe 2 is provided on one side of the valve body 1, and a discharge pipe 3 is provided on the other side of the valve body 1. A valve seat 7 is provided at the top end inside the valve body 1, and a sealing gasket 8 is supported by the inner wall edge of the valve body 1 at the top of the valve seat 7. A diaphragm 9 is provided at the top end of the sealing gasket 8. A clamping ring 10 is crimped at the top end of the diaphragm 9. A locking sleeve 4 connected to the valve body 1 is sleeved at the top end of the clamping ring 10. A pneumatic actuator 5 is installed at the top end of the locking sleeve 4. A pressure piston 6 is installed at the bottom end of the pneumatic actuator 5. A slider 11 is installed at the bottom end of the pressure piston 6. The slider 11 is arranged at the top end of the diaphragm 9.

[0029] In specific implementation, the pneumatic actuator 5 drives the pressure piston 6 to operate, which can push the slider 11 to move downward, so that the diaphragm 9 at the bottom of the slider 11 moves downward, so that the sealing gasket 8 is pressed against the valve seat 7 to form a seal, so that the valve is closed.

[0030] A through opening is opened in the middle of the valve body 1, and the through opening is connected to the inlet pipe 2. A valve seat 7 is interference fit on the outer side of the top of the through opening, and an annular overflow groove is formed between the outer side of the valve seat 7 and the valve body 1, and the annular overflow groove is connected to the discharge pipe 3.

[0031] In specific implementation, when the valve is in an open state, the medium is discharged from the inlet pipe 2 into the valve body 1 and is sealed by the sealing gasket 8, so that the medium enters the annular overflow groove and enters the discharge pipe 3 from the annular overflow groove for discharge. When the valve is closed, the sealing gasket 8 is pressed onto the auxiliary 7 to seal the through port, thereby blocking the connection between the inlet pipe 2 and the discharge pipe 3, thereby achieving the closure of the valve and blocking the transportation of the medium.

[0032] The height of the diaphragm 9 is 0.8 mm, and the tolerance range is -0.1 to 0 mm.

[0033] As attached Figure 4 As shown, a diaphragm manufacturing device includes an upper pressure seat, a clamping block, an upper deformable body, a lower deformable body and a lower base, wherein a clamping block is arranged at the top of the lower base, a lower deformable body is arranged in the middle of the clamping block, an upper deformable body is crimped to the top edge of the lower deformable body, an upper pressure seat is inserted at the top of the upper deformable body, and the upper pressure seat and the clamping block are slidably matched.

[0034] During the specific implementation, first, the diaphragm raw material is placed on the top of the mold groove opened inside the lower base, and then the clamping block is installed to press the edge of the diaphragm raw material, and then the lower deformation body is inserted into the bracket opened in the middle of the clamping block, so that the bottom of the lower deformation body is connected to the diaphragm raw material, and then the upper deformation body is placed on the supporting platform, so that the upper deformation body is annularly crimped to the edge of the lower deformation body, and then the bottom end of the upper pressure seat is inserted into the upper deformation body, so that the bottom end of the upper pressure seat is connected to the top of the lower deformation body, and at the same time, the distance between the connection between the clamping block and the edge of the upper pressure seat is exactly 2.5mm, and finally, the upper pressure seat is pressed downward to compress the upper deformation body, and at the same time, the lower deformation body squeezes the diaphragm raw material into the mold groove, and the air at the bottom of the diaphragm raw material is discharged from the exhaust hole, so that the diaphragm raw material is extruded and formed to form a diaphragm with a height of 0.8mm and a tolerance range of -0.1 to 0mm.

[0035] A mold groove is provided in the middle of the top of the lower base, and an exhaust hole is provided at the bottom of the mold groove.

[0036] In specific implementation, during the extrusion molding process of the diaphragm, by providing exhaust holes, the air in the mold groove at the bottom of the diaphragm raw material can be discharged from the exhaust holes, thereby preventing the air pressure in the mold groove from increasing and affecting the diaphragm molding accuracy.

[0037] The two sides of the mold groove are in a stepped structure, and the bottom of the pressing block is plugged and matched with the stepped structure.

[0038] In specific implementation, the stepped structure can not only improve the vertical guiding effect, but also press and fix the edge of the diaphragm material.

[0039] A bracket is provided in the middle of the clamping block, a support platform is provided in a ring shape on the top of the bracket, the lower deformation body is inserted in the bracket, and the upper deformation body is pressed on the support platform.

[0040] The connection between the clamping block and the edge of the upper pressure seat is provided with a spacing of 2.5 mm, and when pressed to the lowest end, there is a hard limit effect, which can prevent the diaphragm from deforming to an excessive height.

[0041] A diaphragm manufacturing process comprises the following steps:

[0042] S1: First, place the diaphragm raw material on the top of the mold groove opened inside the lower base, and then install the pressing block to press the edge of the diaphragm raw material;

[0043] S2: Then, the lower deformable body is inserted into the bracket opened in the middle of the pressing block, so that the bottom of the lower deformable body is connected to the diaphragm raw material, and then the upper deformable body is placed on the supporting platform, so that the upper deformable body is annularly pressed against the edge of the lower deformable body;

[0044] S3: Insert the bottom end of the upper press seat into the upper deformation body, so that the bottom end of the upper press seat is connected to the top of the lower deformation body, and at the same time, the distance between the clamping block and the edge of the upper press seat is exactly 2.5mm;

[0045] S4: Finally, the upper deformation body is compressed by pressing down the upper pressure seat, and at the same time, the lower deformation body squeezes the diaphragm raw material into the mold groove, and the air at the bottom of the diaphragm raw material is discharged from the exhaust hole, so that the diaphragm raw material is extruded and formed to form a diaphragm with a height of 0.8mm and a tolerance range of -0.1 to 0mm.

[0046] The diaphragm formed by extrusion of the diaphragm raw material has a semicircular arch structure in the middle, and a horizontal ring piece is formed on the edge. The outer diameter of the horizontal ring piece is 22mm, with a tolerance of -0.1 to 0mm. The outer diameter of the semicircular arch structure is 18.6mm, with a tolerance of -0.1 to 0.1mm. The center radius of the semicircular arch structure is 64.5mm. The chamfer radius at the connection between the semicircular arch structure and the horizontal ring piece is 0.5mm, and the thickness of the horizontal ring piece is 0.127mm.

[0047] Specifically, the life test was conducted on the diaphragm manufactured by the above process. At the same time, diaphragms of different thicknesses manufactured by the traditional process were selected for comparison, as shown in the test results in the following table.

[0048]

[0049] As can be seen from the table above, when the diaphragm thickness is 0.8mm, 0.75mm and 0.78mm, the life test results of the diaphragm are all above 45 million times. It is preferred to use 0.8mm which is more wear-resistant, which shows that the diaphragm produced by this process can have a longer service life than the diaphragm produced by traditional technology, thereby also improving the service life of the valve.

[0050] Finally, a few points should be explained: First, in the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0051] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0052] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve with a long service life, comprising a valve body (1), characterized in that: An inlet pipe (2) is provided on one side of the valve body (1), and an outlet pipe (3) is provided on the other side of the valve body (1); a valve seat (7) is provided at the top end of the valve body (1); a sealing gasket (8) is supported on the inner wall edge of the valve body (1) at the top end of the valve seat (7); a diaphragm (9) is provided at the top end of the sealing gasket (8); a clamping ring (10) is crimped at the top end of the diaphragm (9); a locking sleeve (4) connected to the valve body (1) is sleeved at the top end of the clamping ring (10); a pneumatic actuator (5) is installed at the top end of the locking sleeve (4); a pressure piston (6) is installed at the bottom end of the pneumatic actuator (5); a slider (11) is installed at the bottom end of the pressure piston (6); and the slider (11) is arranged at the top end of the diaphragm (9); A through opening is provided in the middle of the valve body (1), the through opening is communicated with the inlet pipe (2), a valve seat (7) is interference fit on the outer side of the top end of the through opening, an annular overflow groove is formed between the outer side of the valve seat (7) and the valve body (1), and the annular overflow groove is communicated with the outlet pipe (3).

2. A valve with a long service life according to claim 1, characterized in that: The height of the diaphragm (9) is 0.8 mm, and the tolerance range is -0.1 to 0 mm.

3. A diaphragm manufacturing device, characterized in that: It includes an upper pressing seat, a pressing block, an upper deforming body, a lower deforming body and a lower base, wherein a pressing block is arranged at the top of the lower base, a lower deforming body is arranged in the middle of the pressing block, an upper deforming body is pressed at the top edge of the lower deforming body, an upper pressing seat is inserted at the top of the upper deforming body, and the upper pressing seat and the pressing block are slidably matched; A mold groove is provided in the middle of the top of the lower base, and an exhaust hole is provided at the bottom of the mold groove; The two sides of the die groove are in a stepped structure, and the bottom of the pressing block is plugged into and matched with the stepped structure; A bracket is provided in the middle of the clamping block, a support platform is provided in a ring shape on the top of the bracket, the lower deformation body is inserted in the bracket, and the upper deformation body is pressed on the support platform.

4. A diaphragm manufacturing device according to claim 3, characterized in that: A 2.5 mm spacing is provided at the connection between the clamping block and the edge of the upper press seat.

5. A diaphragm manufacturing process, characterized in that: The following steps are involved: S1: First, place the diaphragm raw material on the top of the mold groove opened inside the lower base, and then install the pressing block to press the edge of the diaphragm raw material; S2: Then, the lower deformable body is inserted into the bracket opened in the middle of the pressing block, so that the bottom of the lower deformable body is connected to the diaphragm raw material, and then the upper deformable body is placed on the supporting platform, so that the upper deformable body is annularly pressed against the edge of the lower deformable body; S3: Insert the bottom end of the upper press seat into the upper deformation body, so that the bottom end of the upper press seat is connected to the top of the lower deformation body, and at the same time, the distance between the clamping block and the edge of the upper press seat is exactly 2.5mm; S4: Finally, the upper deformation body is compressed by pressing down the upper pressure seat, and at the same time, the lower deformation body squeezes the diaphragm raw material into the mold groove, and the air at the bottom of the diaphragm raw material is discharged from the exhaust hole, so that the diaphragm raw material is extruded and formed to form a diaphragm with a height of 0.8mm and a tolerance range of -0.1 to 0mm.

6. A diaphragm manufacturing process according to claim 4, characterized in that: The diaphragm formed by extrusion of the diaphragm raw material has a semicircular arch structure in the middle, and a horizontal ring piece is formed on the edge. The outer diameter of the horizontal ring piece is 22mm, with a tolerance of -0.1 to 0mm. The outer diameter of the semicircular arch structure is 18.6mm, with a tolerance of -0.1 to 0.1mm. The center radius of the semicircular arch structure is 64.5mm. The chamfer radius at the connection between the semicircular arch structure and the horizontal ring piece is 0.5mm, and the thickness of the horizontal ring piece is 0.127mm.

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