CN212203220U - Pneumatic diaphragm valve - Google Patents
Pneumatic diaphragm valve Download PDFInfo
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- CN212203220U CN212203220U CN201922495768.1U CN201922495768U CN212203220U CN 212203220 U CN212203220 U CN 212203220U CN 201922495768 U CN201922495768 U CN 201922495768U CN 212203220 U CN212203220 U CN 212203220U
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Abstract
The utility model relates to a pneumatic diaphragm valve, wherein a valve body nut is sleeved on a valve body; the water sealing sleeve is arranged in the valve body nut; the diaphragm is arranged in the valve body nut; the valve clack is arranged above the diaphragm, and the valve clack insert is arranged in the center of the upper part in the valve clack; the diaphragm is connected with the valve clack through threads; the hexagonal fastening nut is arranged in the center above the water sealing sleeve, and the cavity insert is screwed in the hexagonal fastening nut; the piston rod is connected with the valve clack insert; the second sealing ring is arranged in the main rod part; the piston large gasket is arranged in the cavity; the piston is arranged above the large piston gasket, and a third sealing ring is arranged between the piston and the inner wall of the cavity; the small piston gasket is arranged in the center above the piston; the piston nut is screwed on the piston rod and is positioned above the small piston washer; the indicating rod is screwed on the piston nut; the end cover is screwed on the cavity; the spring is disposed in the space between the piston and the end cap. The pneumatic diaphragm valve can operate for a long time under the special working condition of high corrosivity.
Description
Technical Field
The utility model relates to a valve control field, in particular to pneumatic diaphragm valve.
Background
The pneumatic diaphragm valve is a special type of cut-off valve, and its opening and closing member is a diaphragm made of soft material, and can separate the inner cavity of valve body from the inner cavity of valve cover and driving component, so that it is called pneumatic diaphragm valve.
At present, most of domestic pneumatic diaphragm valves are made of aluminum alloy or stainless steel, all metal materials cannot resist corrosion for a long time, strong acid is needed to be used for cleaning electronic components in electronic industries such as solar photovoltaic and semiconductors, corrosive media volatilize in the cleaning process, and therefore acid mist exists in the environment, and the corrosion resistance of the aluminum alloy and the stainless steel is far lower than that of plastic products; therefore, the aluminum alloy and stainless steel pneumatic actuators slowly decay in such an environment for a long time, which leads to actuator failure.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a pneumatic diaphragm valve that can long-term operation under the special operating mode of high corrosivity.
The technical scheme for realizing the purpose of the utility model is to provide a pneumatic diaphragm valve, which comprises a valve body, a valve body nut, a water sealing sleeve, a diaphragm, a valve clack insert, a hexagonal fastening nut, a cavity, a connecting pipe, a cavity insert, a piston rod, a second sealing ring, a piston large gasket, a piston small gasket, a piston nut, a third sealing ring, an indicating rod, a fourth sealing ring, an end cover and a spring;
the valve body is provided with a channel which is used for medium to flow through and arranged in the left-right direction, and the bottom of the center of the inner cavity of the valve body is provided with a bulge for blocking the diaphragm; the valve body is also provided with an upper neck part with an upward opening for installing the diaphragm and the valve body nut; the valve body nut is sleeved on the upper neck of the valve body and can be connected with the valve body through threads, and the valve body nut is provided with a through hole with an upward opening; the water sealing sleeve is provided with a step-shaped through hole which is gradually enlarged from top to bottom, and the shape of the outer periphery of the upper part of the water sealing sleeve corresponds to the shape of the upper part of the inner end of the valve body; the water sealing sleeve is arranged in the valve body nut, and the upper neck part of the valve body is positioned between the water sealing sleeve and the valve body nut; the diaphragm is arranged at the bottom in the valve body nut, the circumferential edge of the diaphragm is pressed by the water sealing sleeve, and the lower end face of the circumferential edge of the diaphragm is blocked by the edge annular bulge at the lower inner end of the upper neck at the opening at the upper end of the valve body; the valve clack is arranged above the diaphragm, a valve clack insert is arranged in the valve clack, and the valve clack insert is arranged in the center of the upper part in the valve clack; a T-shaped groove is formed in the center of the middle upper part of the valve clack insert; the diaphragm penetrates through the valve clack through a bolt embedded in the center of the upper part of the diaphragm and is screwed on the valve clack insert in the valve clack, so that the diaphragm is connected with the valve clack through the valve clack insert by threads; the outer edge of the upper end face of the valve clack is abutted against the upper end face of the maximum hole part at the inner end of the water sealing sleeve; the hexagonal fastening nut is arranged in the center above the water sealing sleeve and comprises an upper round part, a hexagonal part, a middle round part and a lower round part from top to bottom, the upper round part, the hexagonal part and the middle round part are gradually enlarged from top to bottom, the lower round part is smaller than the hexagonal part and larger than the upper round part, and the hexagonal fastening nut is provided with an internal thread through hole which is communicated up and down;
the cavity insert comprises an upper limit part and a threaded connecting part connected below the upper limit part, the upper limit part consists of two annular disc parts, the two annular disc parts at intervals form an annular groove with an outward opening, and the cavity insert is provided with a through hole which is communicated up and down; the upper limit part of the cavity insert is arranged in the center of the lower end face of the cavity in a closed manner; the threaded connecting part of the cavity insert wraps the connecting pipe of the cavity; the cavity insert is screwed in the hexagonal fastening nut;
the piston rod is a three-section valve rod and comprises a T-shaped connecting part, a main rod part and an upper connecting part from bottom to top, the upper connecting part is smaller than the main rod part, the upper part of the upper connecting part is provided with external threads, and the middle part of the main rod part is provided with an annular second sealing ring groove; the piston rod is embedded into the T-shaped groove of the valve clack insert through the T-shaped connecting part and is connected with the valve clack insert; the second sealing ring is arranged in a second sealing ring groove of the main rod part; the piston large washer is arranged in the cavity and is positioned at the lower part of the upper connecting part of the piston rod and is limited downwards by the main rod part; the piston is arranged above the large piston gasket, and a third sealing ring is arranged between the piston and the inner wall of the cavity; the small piston gasket is arranged in the center above the piston; the piston nut is screwed on the upper connecting part of the piston rod and is positioned above the small piston washer;
a fourth sealing ring groove is formed in the upper portion of the indicating rod; a threaded connecting part with a smaller diameter is arranged below the indicating rod, and the threaded connecting part of the indicating rod is screwed on the piston nut; the fourth sealing ring is arranged in the fourth sealing ring groove;
the peripheral shape of the end cover corresponds to the inner peripheral surface of the upper part of the cavity and is in a tubular shape with a downward opening, the center of the upper end surface of the end cover is provided with an indicating rod hole, the peripheral periphery of the end cover is provided with external threads, and the center of the inner part of the end cover is provided with a shaft sleeve; the end cover is screwed on the cavity, the shaft sleeve of the end cover is sleeved on the indicating rod and the piston nut, and the circumferential outer edge of the end cover can prevent the piston from continuously moving upwards; the indicating rod protrudes out of the end cover; the spring is disposed in the space between the piston and the end cap.
Further, the pneumatic diaphragm valve further comprises a socket and a screw cap; two bellmouths are respectively installed at the left end and the right end of the valve body through corresponding screw caps in a detachable mode, the screw caps are screwed at the left end and the right end of the valve body through threaded connection, and first sealing rings are arranged between the contact surfaces of the bellmouths and the valve body.
Furthermore, a first tooth part and a second tooth part which are annularly arranged are arranged at an opening at the upper end of the water sealing sleeve, a hemispherical bulge is arranged at the inner end of the first tooth part, and the first tooth part and the second tooth part of the water sealing sleeve are exposed out of the valve body nut; the lower end surface of the valve body is provided with positioning grooves which are distributed at intervals in the circumferential direction and correspond to the second tooth part; the upper part of the threaded connecting part of the cavity insert is provided with an annular groove corresponding to the hemispherical bulge of the first tooth part; the annular groove of the threaded connecting part of the cavity insert is sleeved in the hemispherical bulge of the first tooth part, and the positioning groove of the valve body is sleeved in the second tooth part.
Furthermore, interlayer mesh cloth is added to the diaphragm.
Further, the spring comprises a first spring and a second spring; the first spring and the second spring are respectively a left-handed spring and a right-handed spring, and the first spring and the second spring are arranged in a staggered manner in a space between the piston and the end cover.
Furthermore, the first spring and the surface of the first spring are sprayed with a teflon material.
Furthermore, the hexagonal fastening nut, the valve body insert, the large piston washer, the small piston washer, the piston nut, the cavity insert, the valve clack insert, the first spring and the first spring are made of stainless steel materials, the sealing rings are made of rubber, and other parts except the parts are made of plastics.
The utility model discloses has positive effect: (1) the main body of the pneumatic diaphragm valve is made of plastic, and the pneumatic diaphragm valve can operate for a long time under a special working condition with high corrosivity and has a long service life; the all-plastic valve body, the cavity, the end cover and the like are made of PP + GF materials, and the PP + GF materials have excellent corrosion resistance and higher rigidity and strength and meet various index requirements of products; the inner piston and the middle rotating shaft are made of POM materials, and the POM materials have self-lubricating property and wear resistance, so that the meshing life of the rack can be ensured to be more than 100 ten thousand times; the hexagonal fastening nut, the valve body insert, the large piston gasket, the small piston gasket, the piston nut, the cavity insert and the valve clack insert are made of 316L stainless steel materials, so that the mechanical performance requirements of transmission and connection are met, or encapsulation and injection molding are carried out, or a plastic cover plate is used for covering, so that the 316L stainless steel materials are isolated from the environment, and the corrosion resistance requirements are met.
(2) The diaphragm of the pneumatic diaphragm valve of this embodiment has promoted life 10 times effectively through adding intermediate layer screen cloth after.
(3) The first spring and the second spring 82 of the pneumatic diaphragm valve of the embodiment effectively solve the problem of metal corrosion resistance through a teflon spraying process.
Drawings
Fig. 1 is a schematic structural view (front view) of a pneumatic diaphragm valve according to the present invention;
fig. 2 is a schematic cross-sectional view of the pneumatic diaphragm valve of the present invention;
fig. 3 is an exploded schematic view of the pneumatic diaphragm valve of the present invention.
The reference numbers in the above figures are as follows:
the valve comprises a valve body 1, a bell mouth 21, a nut 22, a valve body nut 31, a water sealing sleeve 32, a diaphragm 33, a valve clack 34, a valve clack insert 35, a hexagonal fastening nut 36, a cavity 41, a connecting pipe 42, a cavity insert 43, a piston rod 51, a second sealing ring 52, a piston large gasket 53, a piston 54, a piston small gasket 55, a piston nut 56, a third sealing ring 57, an indicating rod 61, a fourth sealing ring 62, an end cover 7, a first spring 81 and a second spring 82.
Detailed Description
(example 1)
Referring to fig. 1 to 3, the pneumatic diaphragm valve of the present embodiment includes a valve body 1, a socket 21, a nut 22, a valve body nut 31, a water sealing sleeve 32, a diaphragm 33, a valve flap 34, a valve flap insert 35, a hexagonal fastening nut 36, a cavity 41, a connecting pipe 42, a cavity insert 43, a piston rod 51, a second sealing ring 52, a piston large washer 53, a piston 54, a piston small washer 55, a piston nut 56, a third sealing ring 57, an indicating rod 61, a fourth sealing ring 62, an end cap 7, a first spring 81, and a second spring 82.
The structure of the valve body 1, namely the valve body structure of a conventional diaphragm valve, is provided with a channel which is used for medium to flow through and arranged in the left-right direction, and the bottom of the center of an inner cavity of the valve body 1 is provided with a bulge for blocking the diaphragm. The valve body 1 is also provided with an upper neck with an upward opening for mounting the diaphragm and the valve body nut. Two bellmouths 21 are detachably installed at the left end and the right end of the valve body 1 through corresponding screw caps 22 respectively, the screw caps 22 are screwed at the left end and the right end of the valve body 1 through threaded connection, and first sealing rings are arranged between the contact surfaces of the bellmouths 21 and the valve body 1. The valve body nut 31 is sleeved on the upper neck of the valve body 1, the valve body nut 31 is in threaded connection with the valve body, and the valve body nut 31 is provided with a through hole with an upward opening. The water sealing sleeve 32 is provided with a stepped through hole which is gradually enlarged from top to bottom, an opening at the upper end of the water sealing sleeve 32 is provided with a first tooth part which is annularly arranged and a second tooth part which is positioned at the outer side, the inner end of the first tooth part is provided with a hemispherical bulge, and the shape of the outer periphery of the upper part of the water sealing sleeve 32 corresponds to the shape of the upper part of the inner end of the valve body 31; the water seal jacket 32 is disposed in the valve body nut 31, the first tooth portion and the second tooth portion of the water seal jacket 32 are exposed to the valve body nut 31, and the upper neck portion of the valve body 1 is located between the water seal jacket 32 and the valve body nut 31. The diaphragm 33 is arranged at the bottom in the valve body nut 31, the circumferential edge of the diaphragm is pressed by the water sealing sleeve 32, and the lower end face of the circumferential edge of the diaphragm 33 is blocked by the edge annular bulge at the lower inner end of the upper neck at the opening at the upper end of the valve body 1; the diaphragm 33 is added with a sandwich mesh to improve the service life. The valve clack 34 is arranged above the diaphragm 33, a valve clack insert 35 is arranged in the valve clack 34, the valve clack insert 35 is made of stainless steel, and the valve clack insert 35 is arranged in the center of the upper portion in the valve clack 34; a T-shaped groove is formed in the center of the middle upper part of the valve clack insert 35; the diaphragm 33 is screwed to a valve flap insert 35 in the valve flap 34 through the valve flap 34 by a bolt inserted in the center of the upper portion of the diaphragm 33, so that the diaphragm 33 is screwed to the valve flap 34 through the valve flap insert 35; the upper end face outer edge of the valve flap 34 abuts against the upper end face of the inner end maximum hole portion of the water seal jacket 32. Hexagonal fastening nut 36 sets up in the top center of sealing water jacket 32, and hexagonal fastening nut 36 includes from last round portion, hexagonal portion, well round portion and the lower round portion down, and last round portion, hexagonal portion, well round portion gradually enlarge from last down, and lower round portion is less than hexagonal portion and is greater than last round portion, and hexagonal fastening nut 36 is equipped with the internal thread through-hole that link up from top to bottom.
The cavity 41 has an upward opening, the upper part of the cavity 41 is provided with internal threads, the right end of the cavity 41 is provided with an air inlet and an air outlet, the center of the lower end surface of the cavity 41 is provided with a convex connecting pipe 42, and the lower end surface of the valve body 1 is provided with positioning grooves corresponding to the second tooth parts and distributed at intervals in the circumferential direction. The cavity insert 43 is made of stainless steel, the cavity insert 43 comprises an upper limit part and a threaded connection part connected below the upper limit part, the upper limit part consists of two annular disc parts, the two annular disc parts at intervals form an annular groove with an outward opening, and the cavity insert 43 is provided with a through hole which is communicated up and down; the upper limit part of the cavity insert 43 is arranged in the center of the lower end face of the cavity 41 in a closed manner, namely, the cavity insert 43 is formed in a mold once during injection molding and is integrated with the cavity; the connecting pipe 42 of the cavity 41 is wrapped by the threaded connecting part of the cavity insert 43; the upper portion of the threaded connection portion of the cavity insert 43 is provided with an annular groove corresponding to the hemispherical protrusion of the first tooth portion. The cavity insert 43 is screwed in the hexagonal fastening nut 36, the annular groove of the threaded connection part of the cavity insert 43 is sleeved in the hemispherical protrusion of the first tooth part, the positioning groove of the valve body 1 is sleeved in the second tooth part, so that the water sealing sleeve 32 is connected with the cavity 41, and the cavity 41 is positioned above the valve body nut 31.
The piston rod 51 is a three-section valve rod and comprises a T-shaped connecting part, a main rod part and an upper connecting part from bottom to top, the upper connecting part is smaller than the main rod part, the upper part of the upper connecting part is provided with external threads, and the middle part of the main rod part is provided with an annular second sealing ring groove; the piston rod 51 is connected to the valve flap insert 35 by inserting its T-shaped connecting portion into the T-shaped groove of the valve flap insert 35; a second seal 52 is disposed in the second seal groove of the main stem portion. The piston large washer 53 and the piston small washer 55 are both made of stainless steel, the piston large washer 53 is arranged in the cavity 41, and the lower part of the upper connecting part of the piston rod 51 is limited downwards by the main rod part; the piston 54 is arranged above the piston large gasket 53, and a third sealing ring 57 is arranged between the piston 54 and the inner wall of the cavity 41; a piston small washer 55 is provided in the upper center of the piston 54; the piston nut 56 is screwed on the upper connecting part of the piston rod 51, and the piston nut 56 is positioned above the piston small washer 55.
A fourth sealing ring groove is formed in the upper portion of the indicating rod 61; a threaded portion having a small diameter is provided below the indication rod 61, and the threaded portion of the indication rod 61 is screwed to the piston nut 56, thereby connecting the indication rod 61 to the piston rod 51. The fourth seal 62 is disposed in the fourth seal groove.
The circumferential outer periphery of the end cover 7 corresponds to the upper inner peripheral surface of the cavity 41 and is in a tubular shape with a downward opening, an indicating rod hole is formed in the center of the upper end surface of the end cover, external threads are arranged on the circumferential outer periphery of the end cover 7, and a shaft sleeve is arranged in the center of the inner part of the end cover 7; the end cap 7 is screwed on the cavity 41, and the shaft sleeve thereof is sleeved on the indicating rod 61 and the piston nut 56, and the circumferential outer edge of the end cap 7 can block the piston 54 from further moving upwards. The indicating rod 61 protrudes from the end cap 7.
The parts are made of plastic, except for the sealing rings, each made of rubber, except for the indication that stainless steel materials such as spring 81 and spring 82 are used.
When the pneumatic diaphragm valve of the embodiment is used, an air inlet is used for air inlet, the second sealing ring 52 and the third sealing ring 57 are sealed to form a closed cavity, and the air pressure acts on a piston assembly consisting of a piston 54, a small piston gasket 55 and a large piston gasket 53; after the piston assembly is subjected to air pressure, the piston assembly overcomes the elastic forces of the two springs and drives the piston rod 51 and the indicating rod 61 to move upwards; the two springs rotate leftwards and rightwards respectively to avoid overlapping, and gas is discharged from the exhaust port after the springs are compressed; the indicating rod 61 moves upwards, and the valve clack insert 43, the valve clack 34 and the diaphragm 33 are driven to move upwards together; until the piston assembly is limited by the end cover 7, the movement is stopped, the diaphragm 33 is in an open state, and the medium flows; when the air inlet is controlled to stop air or the air source is in failure by the PLC, the two springs act on the piston assembly through the elasticity of the two springs, the transmission force is transmitted to the piston rod 51, the piston rod 51 transmits the force to the valve clack insert 43, the valve clack insert 43 transmits the force to the valve clack 34, the valve clack 34 and the valve body 1 tightly press the diaphragm 33, and the medium flow in the pipeline is cut off.
It should be understood that the above examples are only for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious changes and modifications which fall within the spirit of the invention are deemed to be covered by the scope of the invention.
Claims (6)
1. A pneumatic diaphragm valve, characterized by: the valve comprises a valve body, a valve body nut, a water sealing sleeve, a diaphragm, a valve clack insert, a hexagonal fastening nut, a cavity, a connecting pipe, a cavity insert, a piston rod, a second sealing ring, a piston large gasket, a piston small gasket, a piston nut, a third sealing ring, an indicating rod, a fourth sealing ring, an end cover and a spring;
the valve body is provided with a channel which is used for medium to flow through and arranged in the left-right direction, and the bottom of the center of the inner cavity of the valve body is provided with a bulge for blocking the diaphragm; the valve body is also provided with an upper neck part with an upward opening for installing the diaphragm and the valve body nut; the valve body nut is sleeved on the upper neck of the valve body and is provided with a through hole with an upward opening; the water sealing sleeve is provided with a step-shaped through hole which is gradually enlarged from top to bottom, and the shape of the outer periphery of the upper part of the water sealing sleeve corresponds to the shape of the upper part of the inner end of the valve body; the water sealing sleeve is arranged in the valve body nut, and the upper neck part of the valve body is positioned between the water sealing sleeve and the valve body nut; the diaphragm is arranged at the bottom in the valve body nut, the circumferential edge of the diaphragm is pressed by the water sealing sleeve, and the lower end face of the circumferential edge of the diaphragm is blocked by the edge annular bulge at the lower inner end of the upper neck at the opening at the upper end of the valve body; the valve clack is arranged above the diaphragm, a valve clack insert is arranged in the valve clack, and the valve clack insert is arranged in the center of the upper part in the valve clack; a T-shaped groove is formed in the center of the middle upper part of the valve clack insert; the diaphragm penetrates through the valve clack through a bolt embedded in the center of the upper part of the diaphragm and is screwed on the valve clack insert in the valve clack, so that the diaphragm is connected with the valve clack through the valve clack insert by threads; the outer edge of the upper end face of the valve clack is abutted against the upper end face of the maximum hole part at the inner end of the water sealing sleeve; the hexagonal fastening nut is arranged in the center above the water sealing sleeve and comprises an upper round part, a hexagonal part, a middle round part and a lower round part from top to bottom, the upper round part, the hexagonal part and the middle round part are gradually enlarged from top to bottom, the lower round part is smaller than the hexagonal part and larger than the upper round part, and the hexagonal fastening nut is provided with an internal thread through hole which is communicated up and down;
the cavity insert comprises an upper limit part and a threaded connecting part connected below the upper limit part, the upper limit part consists of two annular disc parts, the two annular disc parts at intervals form an annular groove with an outward opening, and the cavity insert is provided with a through hole which is communicated up and down; the upper limit part of the cavity insert is arranged in the center of the lower end face of the cavity in a closed manner; the threaded connecting part of the cavity insert wraps the connecting pipe of the cavity; the cavity insert is screwed in the hexagonal fastening nut;
the piston rod is a three-section valve rod and comprises a T-shaped connecting part, a main rod part and an upper connecting part from bottom to top, the upper connecting part is smaller than the main rod part, the upper part of the upper connecting part is provided with external threads, and the middle part of the main rod part is provided with an annular second sealing ring groove; the piston rod is embedded into the T-shaped groove of the valve clack insert through the T-shaped connecting part and is connected with the valve clack insert; the second sealing ring is arranged in a second sealing ring groove of the main rod part; the piston large washer is arranged in the cavity and is positioned at the lower part of the upper connecting part of the piston rod and is limited downwards by the main rod part; the piston is arranged above the large piston gasket, and a third sealing ring is arranged between the piston and the inner wall of the cavity; the small piston gasket is arranged in the center above the piston; the piston nut is screwed on the upper connecting part of the piston rod and is positioned above the small piston washer;
a fourth sealing ring groove is formed in the upper portion of the indicating rod; a threaded connecting part with a smaller diameter is arranged below the indicating rod, and the threaded connecting part of the indicating rod is screwed on the piston nut; the fourth sealing ring is arranged in the fourth sealing ring groove;
the peripheral shape of the end cover corresponds to the inner peripheral surface of the upper part of the cavity and is in a tubular shape with a downward opening, the center of the upper end surface of the end cover is provided with an indicating rod hole, the peripheral periphery of the end cover is provided with external threads, and the center of the inner part of the end cover is provided with a shaft sleeve; the end cover is screwed on the cavity, the shaft sleeve of the end cover is sleeved on the indicating rod and the piston nut, and the circumferential outer edge of the end cover can prevent the piston from continuously moving upwards; the indicating rod protrudes out of the end cover; the spring is disposed in the space between the piston and the end cap.
2. A pneumatic diaphragm valve according to claim 1, wherein: the device also comprises a socket and a screw cap; the two bellmouths are detachably arranged at the left end and the right end of the valve body respectively through corresponding screw caps, the screw caps are screwed at the left end and the right end of the valve body through threaded connection, and a first sealing ring is arranged between the bellmouths and the contact surface of the valve body; the valve body nut is connected with the valve body through threads.
3. A pneumatic diaphragm valve according to claim 1, wherein: a first tooth part and a second tooth part which are annularly arranged are arranged at an opening at the upper end of the water sealing sleeve, a hemispherical bulge is arranged at the inner end of the first tooth part, and the first tooth part and the second tooth part of the water sealing sleeve are exposed out of the valve body nut; the lower end surface of the valve body is provided with positioning grooves which are distributed at intervals in the circumferential direction and correspond to the second tooth part; the upper part of the threaded connecting part of the cavity insert is provided with an annular groove corresponding to the hemispherical bulge of the first tooth part; the annular groove of the threaded connecting part of the cavity insert is sleeved in the hemispherical bulge of the first tooth part, and the positioning groove of the valve body is sleeved in the second tooth part.
4. A pneumatic diaphragm valve according to claim 1, wherein: and adding interlayer mesh cloth to the diaphragm.
5. A pneumatic diaphragm valve according to claim 1, wherein: the spring comprises a first spring and a second spring; the first spring and the second spring are respectively a left-handed spring and a right-handed spring, and the first spring and the second spring are arranged in a staggered manner in a space between the piston and the end cover.
6. A pneumatic diaphragm valve according to claim 5, wherein: the surfaces of the first spring and the first spring are sprayed with Teflon materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922495768.1U CN212203220U (en) | 2019-12-31 | 2019-12-31 | Pneumatic diaphragm valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922495768.1U CN212203220U (en) | 2019-12-31 | 2019-12-31 | Pneumatic diaphragm valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212203220U true CN212203220U (en) | 2020-12-22 |
Family
ID=73810448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922495768.1U Active CN212203220U (en) | 2019-12-31 | 2019-12-31 | Pneumatic diaphragm valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212203220U (en) |
-
2019
- 2019-12-31 CN CN201922495768.1U patent/CN212203220U/en active Active
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230119 Address after: No. 6, Wangxian Road, Airport Industrial Park, Xinbei District, Changzhou City, Jiangsu Province, 213136 Patentee after: Haipri (Changzhou) Clean System Technology Co.,Ltd. Address before: Airport Industrial Park, Xinbei District, Changzhou City, Jiangsu Province Patentee before: HUASHENG PIPELINE TECHNOLOGY CO.,LTD. |
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| TR01 | Transfer of patent right |