Anti-corrosion pneumatic check valve

Abstract

The invention relates to the technical field of check valve application, in particular to an anti-corrosion pneumatic check valve which comprises a valve body assembly, the valve body assembly comprises a valve body shell, the front end and the rear end of the valve body shell are communicated with external flanges through pipelines, and a side mounting shell is integrally and fixedly connected to the side wall of the valve body shell; a pneumatic assembly used for pneumatically controlling the check valve is installed on the top of the side-mounted shell, a movable column is installed on an output connector of the pneumatic assembly and slidably connected to the connecting block, a valve clack is in contact fit with the interior of the valve body shell, a mounting column is fixedly connected to the central axis position of the rear side face of the valve clack, and a bolt section is arranged at the rear end of the mounting column. According to the anti-corrosion check valve, the valve body assembly and the protection assembly are used in cooperation, the service life of the check valve can be greatly prolonged, the use risk is reduced, meanwhile, the external corrosion resistance of the check valve is improved in an external protection mode, and the environmental adaptability of the check valve is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of check valve application, and in particular to an anti-corrosion pneumatic check valve. Background Art

[0002] The anti-corrosion pneumatic check valve is a valve specially designed to prevent the backflow of media in the pipeline and has strong corrosion resistance. This type of valve is widely used in the chemical, petroleum, pharmaceutical and other industries, especially in the treatment of corrosive media such as acid and alkali solutions.

[0003] The corrosion-resistant pneumatic check valve is mainly composed of components such as a valve body, a valve disc and a valve cover. The valve body and valve disc of existing corrosion-resistant pneumatic check valves are mostly made of corrosion-resistant materials or undergo special surface treatment to enhance their ability to resist harsh working environments. However, the pipelines used in general industries are large-flow pipelines, and the fluid has a strong impact force. It is difficult to ensure that the check valve has a good impact resistance effect only by relying on the material's own properties. At the same time, existing corrosion-resistant pneumatic check valves generally only have corrosion-resistant protection on the inside, and the working environment of the check valve causes its outside to also have a greater risk of corrosion, which is not conducive to ensuring the service life of the check valve. Summary of the invention

[0004] Technical problem to be solved: The present invention provides an anti-corrosion pneumatic check valve, which can solve the above-mentioned problems.

[0005] Technical solution: In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a corrosion-resistant pneumatic check valve, including a valve body assembly, the valve body assembly includes a valve body shell, the front and rear ends of the valve body shell are connected with external flanges through a pipeline, a side shell is integrally fixedly connected to the side wall of the valve body shell, the side shell and the interior of the valve body shell are communicated, a pneumatic assembly for pneumatically controlling the check valve is installed on the top of the side shell, the output interface of the pneumatic assembly is installed with a movable column, the movable column is slidably connected to a connecting block, the connecting block is fixedly connected to the inner wall of the side shell, a valve disc is contacted and matched inside the valve body shell, a mounting column is fixedly connected at the central axis position of the rear side of the valve disc, a bolt section is arranged at the rear end of the mounting column, the bolt section is fixedly connected to a lifting and pulling crank through a locking nut, the lifting and pulling crank is V-shaped, and the upper end of the lifting and pulling crank is connected to the side shell in a backward tilted rotation manner by a swivel pin.

[0006] The valve body shell and the side-mounted shell are provided with a protective component for externally protecting the surfaces of the two.

[0007] The anti-corrosion pneumatic check valve can have the characteristics of high strength and corrosion resistance by using the valve body assembly and the protection assembly in combination.

[0008] As a preferred technical solution of the present invention, the front side of the valve disc is set to a spherical crown shape, and a plurality of guide grooves distributed in the left and right directions are opened on the front side of the valve disc. The plurality of guide grooves are arranged equidistantly and spacers are left between two adjacent guide grooves.

[0009] As a preferred technical solution of the present invention, a plurality of reinforcing ribs are fixedly connected to the rear side surface of the valve disc at equal intervals around the circumference.

[0010] As a preferred technical solution of the present invention, the lower end of the movable column is rotatably connected to a roller, and the roller is in rolling contact with the upper surface of the upper short arm of the lifting crutch.

[0011] As a preferred technical solution of the present invention, a limiting guide groove is provided on a side surface adjacent to the lifting crutch and the connecting block, a connecting arm is limited and slidably connected in the limiting guide groove, and one end of the connecting arm away from the lifting crutch is hinged on the connecting block.

[0012] As a preferred technical solution of the present invention, a sealing component for contact sealing between the valve flap and the valve body shell is provided at the contact position between the valve flap and the valve body shell.

[0013] As a preferred technical solution of the present invention, the sealing component includes an inner sealing ring sleeved on the edge of the valve disc, a plurality of limit clamping rings 2 are integrally arranged on the inner ring wall of the inner sealing ring, a plurality of limit ring grooves 2 are opened on the edge of the valve disc corresponding to the plurality of limit clamping rings 2, the limit ring grooves 2 and the limit clamping rings 2 are matched one by one, a semicircular ring edge is integrally arranged on the outer ring wall of the inner sealing ring, an outer sealing ring matching its semicircular ring edge is sleeved on the outer ring surface of the inner sealing ring, the rear part of the inner ring surface of the outer sealing ring is arranged as a bell mouth, a plurality of limit ring grooves 1 are opened on the outer ring wall of the outer sealing ring, a limit clamping ring 1 is arranged at the position where the inner wall of the valve body shell contacts the valve disc, and the limit ring groove 1 and the limit clamping ring are matched one by one.

[0014] As a preferred technical solution of the present invention, the protective component includes a protective shell that is sleeved on the outside of the valve body shell and the side-mounted shell. The protective shell adopts a double-petal structure and a number of clamping components are arranged on the connecting seam of the two petals. The clamping components include a clamping seat that is symmetrically fixedly connected to the two petals of the protective shell, a plug plate is fixedly connected to the clamping seat on one side, an arc-shaped protrusion is arranged on one end of the plug plate close to the clamping seat on the other side, and a socket is opened on the clamping seat on the other side corresponding to the plug plate, and the socket is also connected to a pressing port for clamping the arc-shaped protrusion.

[0015] Beneficial effects: 1. The spherical crown structure, guide groove and reinforcing rib plate structure adopted in the present invention can effectively improve the structural strength of the valve flap itself, enhance the resistance performance of the valve flap, ensure the service life of the valve flap, and effectively ensure the normal realization of the valve flap's check function.

[0016] 2. The connection arm and the limiting guide groove used in the present invention cooperate to improve the structural strength of the lifting and pulling crutch, enhance the anti-bending effect of the lifting and pulling crutch, and effectively reduce the risk of bending and breaking of the lifting and pulling crutch.

[0017] 3. The protective component adopted in the present invention can protect the exterior of the valve body shell and the side-mounted shell, and effectively ensure the corrosion resistance of the exterior of the valve body shell and the side-mounted shell.

[0018] 4. The sealing component used in the present invention can ensure the seal between the valve disc and the valve body while ensuring the accurate alignment of the valve disc and the valve body when they are connected. Furthermore, the sealing structure can be quickly replaced to ensure the rapid maintenance of the check valve.

[0019] 5. The valve body assembly and protection assembly adopted in the present invention are used in combination, which can greatly extend the service life of the check valve and reduce the risk of use. At the same time, the external corrosion resistance of the check valve is improved by adopting external protection, thereby further improving the environmental adaptability of the check valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure from the first viewing angle of the present invention.

[0022] Figure 2 It is a three-dimensional structural schematic diagram of the protective component of the present invention.

[0023] Figure 3 The present invention Figure 2 Schematic diagram of the enlarged structure of area A in the middle.

[0024] Figure 4 It is a schematic cross-sectional structural diagram of the valve body assembly of the present invention.

[0025] Figure 5 It is a schematic diagram of the three-dimensional connection structure of the valve flap, the lifting and pulling crutch, the movable column and the connecting block from the first perspective of the present invention.

[0026] Figure 6 It is a schematic diagram of the three-dimensional connection structure of the valve flap, the lifting and pulling crutch, the movable column and the connecting block from a second perspective of the present invention.

[0027] Figure 7 The present invention Figure 4 Schematic diagram of the enlarged structure of area B in the middle.

[0028] In the figure: 1, protective assembly; 11, protective shell; 12, clamping component; 121, clamping seat; 1211, socket; 1212, pressing port; 122, plug plate; 123, arc-shaped protrusion; 2, valve body assembly; 21, valve body shell; 22, external flange; 23, valve disc; 231, reinforcing rib plate; 232, mounting column; 233, locking nut; 234, guide groove; 24, sealing component; 241, internal sealing Sealing ring; 2411, semicircular ring edge; 2412, limiting clamp ring 2; 242, outer sleeve sealing ring; 2421, bell mouth; 2422, limiting ring groove 1; 243, limiting ring groove 2; 244, limiting clamp ring 1; 25, lifting and pulling crutch; 251, limiting guide groove; 252, connecting arm; 253, rotating pin; 26, movable column; 261, roller; 27, connecting block; 28, pneumatic component; 29, side-mounted shell. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0030] See also Figure 4 , Figure 5 and Figure 6 A corrosion-resistant pneumatic check valve includes a valve body assembly 2, the valve body assembly 2 includes a valve body shell 21, the front and rear ends of the valve body shell 21 are connected to an external flange 22 through a pipeline, a side shell 29 is integrally fixedly connected to the side wall of the valve body shell 21, the side shell 29 is communicated with the inside of the valve body shell 21, a pneumatic assembly 28 for pneumatically controlling the opening and closing of the check valve is installed on the top of the side shell 29 (the pneumatic assembly 28 adopts the existing technology), and an active column 26 is installed on the output interface of the pneumatic assembly 28, The movable column 26 is slidably connected to the connecting block 27, and the connecting block 27 is fixedly connected to the inner wall of the side shell 29. The valve body shell 21 is contacted and matched with the valve flap 23 inside. The center axis position of the rear side of the valve flap 23 is fixedly connected with the mounting column 232. The rear end of the mounting column 232 is provided with a bolt section, and the bolt section is fixedly connected to the lifting and pulling crutch 25 through a locking nut 233. The lifting and pulling crutch 25 is V-shaped, and the upper end of the lifting and pulling crutch 25 is connected to the side shell 29 by rotating the rotating pin 253 to tilt backward.

[0031] See also Figure 1 and Figure 4 The valve body shell 21 and the side mounting shell 29 are provided with a protective component 1 for externally protecting the surfaces of both.

[0032] The valve body assembly 2 and the protection assembly 1 are used in combination, so that the anti-corrosion pneumatic check valve can have the characteristics of high strength and corrosion resistance.

[0033] See also Figure 4 and Figure 5The front side of the valve flap 23 is set to be spherical crown shape, and a plurality of guide grooves 234 distributed along the left and right directions are opened on the front side of the valve flap 23. The plurality of guide grooves 234 are arranged at equal distances and a spacer is left between two adjacent guide grooves 234.

[0034] During specific operation, a valve flap 23 combining a spherical crown shape and a guide groove 234 is set. When the valve flap 23 is impacted by the liquid flow and rotated upward to open, the guiding effect of the guide groove 234 is utilized to reduce the fluid resistance of the spherical crown valve flap 23, greatly reduce the pressure loss, and improve the flow capacity of the valve. The spherical crown valve flap 23 can ensure that the front side of the valve flap 23 has a higher strength, thereby increasing its use effect.

[0035] See also Figure 6 A plurality of reinforcing ribs 231 are fixedly connected to the rear side of the valve flap 23 at equal intervals.

[0036] During specific operation, the structural strength of the valve flap 23 is improved by reinforcing the rib plate 231 , so that the impact resistance of the valve flap 23 can be improved, and the valve flap 23 can be effectively prevented from being deformed or damaged under pressure, thereby ensuring the normal realization of the check function.

[0037] See also Figure 6 The lower end of the movable column 26 is rotatably connected to a roller 261 , and the roller 261 is in rolling contact with the upper surface of the upper short arm of the lifting crutch 25 .

[0038] During specific operation, the roller 261 is provided to reduce friction noise and reduce the structural wear of the lifting crutch 25 .

[0039] See also Figure 4 and Figure 6 A limiting guide groove 251 is provided on a side surface adjacent to the lifting crutch 25 and the connecting block 27 , and a connecting arm 252 is limited and slidably connected in the limiting guide groove 251 , and one end of the connecting arm 252 away from the lifting crutch 25 is hinged on the connecting block 27 .

[0040] During specific operation, the connection arm 252 cooperates with the limiting guide groove 251 to provide connection protection when the lifting and pulling crutch 25 rotates, thereby improving the structural strength of the lifting and pulling crutch 25 .

[0041] See also Figure 4 , Figure 5 , Figure 6 and Figure 7The contact position of the valve disc 23 and the valve body shell 21 is provided with a sealing component 24 for contact sealing between the two; the sealing component 24 includes an inner sealing ring 241 sleeved on the edge of the valve disc 23, and a plurality of second limiting snap rings 2412 are integrally provided on the inner ring wall of the inner sealing ring 241. The edge of the valve disc 23 is provided with a plurality of second limiting ring grooves 243 corresponding to the plurality of second limiting snap rings 2412. The second limiting ring grooves 243 and the second limiting snap rings 2412 are matched one by one, and the inner sealing ring 241 is provided with a plurality of second limiting ring grooves 243 corresponding to the plurality of second limiting snap rings 2412. A semicircular ring edge 2411 is integrally arranged on the outer ring wall, an outer ring surface of the inscribed sealing ring 241 is sleeved with an outer sleeve sealing ring 242 which matches with the semicircular ring edge 2411, a bell mouth 2421 is arranged at the rear of the inner ring surface of the outer sleeve sealing ring 242, a plurality of limiting ring grooves 2422 are opened on the outer ring wall of the outer sleeve sealing ring 242, a limiting clamping ring 244 is arranged at the position where the inner wall of the valve body shell 21 contacts the valve disc 23, and the limiting ring grooves 2422 and the limiting clamping ring 244 correspond to each other and match each other.

[0042] During specific operation, the inner sealing ring 241 can be accurately positioned and installed on the valve disc 23 by the fit between the limiting clamp ring 2412 and the limiting ring groove 243 and the elasticity of the inner sealing ring 241. The inner sealing ring 241 has great elasticity and can be pulled to separate the limiting clamp ring 2412 and the limiting ring groove 243, so as to quickly replace the inner sealing ring 241. The outer sealing ring 242 can be accurately positioned and installed on the valve disc 23 by the fit between the limiting ring groove 1 2422 and the limiting clamp ring 1 244 and the elasticity of the outer sleeve sealing ring 242. On the body shell 21, the limiting ring groove 2422 and the limiting clamping ring 244 are disengaged by pulling, so that the outer sleeve sealing ring 242 can be quickly replaced, and the inner sealing ring 241 and the outer sleeve sealing ring 242 are connected to form a clamping sealing structure through the semicircular ring edge 2411 structure. The bell mouth 2421 can be used to automatically connect and align the inner sealing ring 241 and the outer sleeve sealing ring 242 when the valve disc 23 falls, so as to avoid deformation of the inner sealing ring 241 after long-term use, which may cause the inner sealing ring 241 to be unable to accurately align with the outer sleeve sealing ring 242 and cause a clamping edge.

[0043] See also Figure 1 , Figure 2 and Figure 3The protective assembly 1 includes a protective shell 11 which is sleeved on the outside of the valve body shell 21 and the side shell 29. The protective shell 11 adopts a double-petal structure and a plurality of clamping components 12 are arranged on the connecting seam of the two petals. The clamping components 12 include a clamping seat 121 which is symmetrically fixedly connected to the two petals of the protective shell 11. A plug plate 122 is fixedly connected to the clamping seat 121 on one side. An arc-shaped protrusion 123 is arranged at one end of the plug plate 122 close to the clamping seat 121 on the other side. A socket 1211 is opened on the clamping seat 121 on the other side corresponding to the plug plate 122. The socket 1211 is also connected to a pressing port 1212 for clamping the arc-shaped protrusion 123.

[0044] During specific operation, the two halves of the protective shell 11 are completely connected through the cooperation between the plug plate 122 and the socket 1211, and the cooperation between the pressing port 1212 and the arc-shaped protrusion 123. The protective shell 11 is made of corrosion-resistant plastic material as a whole.

[0045] See also Figure 1-Figure 7 , when in use: S1: when the fluid flows from front to back, the pneumatic assembly 28 is closed, the active column 26 is in an active state, and under the impact of the fluid, the valve flap 23 will be pushed open, and the fluid will flow backward.

[0046] S2: When the fluid flows from back to front, the pneumatic assembly 28 is started, the movable column 26 is in a downward pressure state, and the movable column 26 presses against the lifting and pulling frame 25 to keep the lifting and pulling frame 25 in a stable state, so that the valve disc 23 maintains close contact with the inner wall of the valve body shell 21, and the fluid cannot flow.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A corrosion-resistant pneumatic check valve, comprising a valve body assembly (2), characterized in that: The valve body assembly (2) comprises a valve body shell (21), the front and rear ends of the valve body shell (21) are connected to external flanges (22) via pipelines, a side mounting shell (29) is integrally fixedly connected to the side wall of the valve body shell (21), the side mounting shell (29) and the valve body shell (21) are internally connected, and a pneumatic assembly (28) for pneumatically controlling the check valve is installed on the top of the side mounting shell (29); The output interface of the pneumatic component (28) is equipped with a movable column (26), which is slidably connected to a connecting block (27), which is fixedly connected to the inner wall of the side housing (29), and a valve flap (23) is contacted and matched inside the valve body housing (21), and a mounting column (232) is fixedly connected to the central axis position of the rear side of the valve flap (23), and a bolt section is arranged at the rear end of the mounting column (232), which is fixedly connected to the lifting and pulling crank frame (25) through a locking nut (233), and the lifting and pulling crank frame (25) is V-shaped, and the upper end of the lifting and pulling crank frame (25) is connected to the side housing (29) by rotating in a backward tilting manner through a rotating pin (253); The valve body shell (21) and the side-mounted shell (29) are provided with a protective component (1) for externally protecting the surfaces of both. The valve body component (2) and the protective component (1) are used in combination, so that the anti-corrosion pneumatic check valve has high strength and corrosion resistance.

2. The anti-corrosion pneumatic check valve according to claim 1, characterized in that: The front side of the valve flap (23) is configured to be in a spherical crown shape, and a plurality of guide grooves (234) distributed in the left-right direction are provided on the front side of the valve flap (23), the plurality of guide grooves (234) are arranged at equal intervals, and a spacer is left between two adjacent guide grooves (234).

3. The anti-corrosion pneumatic check valve according to claim 1, characterized in that: A plurality of reinforcing rib plates (231) are fixedly connected at equal intervals on the circumference of the rear side surface of the valve flap (23).

4. The anti-corrosion pneumatic check valve according to claim 1, characterized in that: The lower end of the movable column (26) is rotatably connected to a roller (261), and the roller (261) is in rolling contact with the upper surface of the upper short arm of the lifting and pulling crutch (25).

5. The anti-corrosion pneumatic check valve according to claim 1, characterized in that: A limiting guide groove (251) is provided on a side surface adjacent to the lifting crutch (25) and the connecting block (27), and a connecting arm (252) is limited and slidably connected in the limiting guide groove (251), and one end of the connecting arm (252) away from the lifting crutch (25) is hinged on the connecting block (27).

6. The anti-corrosion pneumatic check valve according to claim 1, characterized in that: A sealing component (24) for contact sealing between the valve flap (23) and the valve body shell (21) is provided at a position where the valve flap (23) and the valve body shell (21) contact each other.

7. The anti-corrosion pneumatic check valve according to claim 6, characterized in that: The sealing component (24) comprises an inner sealing ring (241) sleeved on the edge of the valve disc (23); a plurality of second limiting snap rings (2412) are integrally arranged on the inner ring wall of the inner sealing ring (241); a plurality of second limiting ring grooves (243) are opened on the edge of the valve disc (23) in correspondence with the plurality of second limiting snap rings (2412); the second limiting ring grooves (243) and the second limiting snap rings (2412) are in correspondence with each other; and a plurality of second limiting ring grooves (243) and second limiting snap rings (2412) are integrally arranged on the outer ring wall of the inner sealing ring (241). A semicircular ring edge (2411) is provided, an outer sealing ring (242) matching with the semicircular ring edge (2411) is sleeved on the outer ring surface of the inner sealing ring (241), a plurality of limiting ring grooves (2422) are provided on the outer ring wall of the outer sealing ring (242), a limiting clamping ring (244) is provided at a position where the inner wall of the valve body shell (21) contacts the valve disc (23), and the limiting ring grooves (2422) and the limiting clamping ring (244) are matched with each other in a one-to-one correspondence.

8. The anti-corrosion pneumatic check valve according to claim 7, characterized in that: The rear portion of the inner ring surface of the outer sleeve sealing ring (242) is arranged as a bell mouth (2421).

9. The anti-corrosion pneumatic check valve according to claim 1, characterized in that: The protection assembly (1) comprises a protection shell (11) sleeved on the outside of the valve body shell (21) and the side-mounted shell (29); the protection shell (11) adopts a double-flap structure and a plurality of clamping components (12) are arranged on the connecting seam between the two flaps.

10. The anti-corrosion pneumatic check valve according to claim 9, characterized in that: The clamping component (12) comprises a clamping seat (121) symmetrically fixedly connected to two halves of the protective shell (11); a plug plate (122) is fixedly connected to the clamping seat (121) on one side; an arc-shaped protrusion (123) is provided at one end of the plug plate (122) close to the clamping seat (121) on the other side; a socket (1211) is provided on the clamping seat (121) on the other side corresponding to the plug plate (122); and a pressing hole (1212) for inserting the arc-shaped protrusion (123) is also connected to the socket (1211).

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