CN217271928U

CN217271928U - Pneumatic stop valve

Info

Publication number: CN217271928U
Application number: CN202221139555.0U
Authority: CN
Inventors: 方占兵
Original assignee: Yuhuan Better Air Valve Co ltd
Current assignee: Yuhuan Better Air Valve Co ltd
Priority date: 2022-05-12
Filing date: 2022-05-12
Publication date: 2022-08-23
Anticipated expiration: 2032-05-12

Abstract

The utility model provides a pneumatic stop valve belongs to valve technical field. It has solved the problem that current pneumatic stop valve life is low. This pneumatic stop valve includes the valve body, the disk seat, valve rod and cylinder, the bottom of cylinder has the base of cover in the disk seat upper end outside, the valve rod passes disk seat and base and stretch into in the cylinder with the interior piston connection of cylinder, it is equipped with sealing member one and sealing member two to lie in the cover between disk seat and the base on the valve rod, sealing member one and sealing member two all seal with valve rod circumference, the pressure equipment has the spring between sealing member one and the sealing member two, sealing member one and sealing member two support respectively under the effect of spring force and press and form sealedly on base and disk seat. The first sealing element and the second sealing element are arranged on the valve rod in a sleeving manner, and the spring is sleeved on the valve rod, so that the first sealing element, the second sealing element and the spring can be conveniently replaced, and the service life of the valve can be greatly prolonged.

Description

Pneumatic stop valve

Technical Field

The utility model belongs to the technical field of the valve, a stop valve is related to, especially, relate to a pneumatic stop valve.

Background

The stop valve includes parts such as valve body, case, valve rod and disk seat and constitutes the more extensive of using in our daily life, installs mainly in some water pipelines, controls opening and close of stop valve through the removal of case, and conventional stop valve is generally all collocated the cylinder and is used, drives opening and close of the mobile control stop valve of case, and is very convenient through the flexible of cylinder.

The valve rod of the existing pneumatic stop valve and the push rod of the cylinder are generally shared, namely the valve rod extends out of the valve seat of the stop valve and extends into the cylinder to be connected with a piston in the cylinder, so that the piston moves to drive the valve core to move synchronously under the linkage of the valve rod, but the valve rod and the valve seat need to be subjected to sealing treatment, the valve rod and the cylinder body of the cylinder need to be subjected to sealing treatment, and firstly, the valve body is prevented from leaking water, and secondly, the cylinder is prevented from leaking gas. The sealing structure between the valve rod and the valve seat and between the cylinder is generally realized by adopting a packing mode, an installation cavity for the valve rod to pass through is generally arranged between the cylinder and the valve seat, and the installation cavity is filled with packing for sealing, but the packing can run off and the ageing hardening leads to the reduction of the sealing property in the long-term use process, so that the whole stop valve needs to be scrapped.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a pneumatic stop valve. It solves the technical problem that the service life of the existing pneumatic stop valve is short.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a pneumatic stop valve, includes valve body, disk seat, valve rod and cylinder, the bottom of cylinder has the base of cover in the disk seat upper end outside, the valve rod passes disk seat and base and stretch into in the cylinder with the cylinder in the piston connection, a serial communication port, it is equipped with sealing member one and sealing member two to lie in the cover between disk seat and the base on the valve rod, sealing member one and sealing member two all seal with valve rod circumference, the pressure is equipped with the spring between sealing member one and the sealing member two, sealing member one and sealing member two support respectively under the effect of spring force and press and form sealedly on base and disk seat.

The cover is equipped with sealing member one and sealing member two on the valve rod of the pneumatic stop valve of this design, sealing member one and sealing member two all with valve rod circumference sealed, be provided with the spring between sealing member one and sealing member two, the both ends roof pressure respectively of spring backs down the two on sealing member one and sealing member two, sealing member one and sealing member two can firmly the roof pressure on base and disk seat under the effect of spring, even long-time the use also can keep leaning on and obtain the guarantee by trend leakproofness, make holistic durability and life obtain the promotion.

The first sealing element and the second sealing element are arranged on the valve rod in a sleeved mode, the spring is also sleeved on the valve rod, the installation mode is different from a sealing mode of filling filler, the first sealing element, the second sealing element and the spring cannot be replaced after the sealing mode is used for one-time filling, the first sealing element, the second sealing element and the spring can be replaced conveniently, and the service life of the valve can be greatly prolonged.

In the above pneumatic stop valve, a first annular groove is formed in the base near the position close to the valve rod, and a first convex portion inserted into the first annular groove is formed at the upper end of the first sealing element.

The first sealing element is provided with a first convex part which can be inserted into the annular groove on the base, and under the pushing action of the spring, the first convex part is of an embedded mounting structure, so that the sealing performance between the first sealing element and the base is improved, and the service life of the valve can be effectively prolonged due to the improvement of the sealing performance.

In the pneumatic stop valve, a second annular groove is formed in the position, close to the valve rod, on the inner side of the valve seat, and a second convex portion inserted into the second annular groove is formed in the lower end portion of the second sealing element.

The second convex part on the second sealing part has the effect similar to that of the first convex part, and the second convex part can be embedded into the second annular groove in the valve seat, so that the sealing performance between the second sealing part and the valve seat can be effectively improved, and the service life of the stop valve is further prolonged.

In the above pneumatic stop valve, the end of the first convex part is conical, the groove wall of the first annular groove is provided with a first inclined surface matched with the conical end of the first convex part, the end of the second convex part is also conical, and the groove wall of the second annular groove is provided with a second inclined surface matched with the conical end of the second convex part.

The end parts of the first convex part and the second convex part are of conical structures, the first inclined plane and the second inclined plane which are matched with the conical structures are also arranged on the groove walls of the first annular groove and the second annular groove, the design has the advantage that the sealing performance can be effectively improved by matching the two conical structures with the first inclined plane and the second inclined plane respectively under the jacking pressure of the spring, even if the first sealing element and the second sealing element are worn for a long time, the inclined plane sealing is difficult to attenuate as long as the spring elasticity is ensured, and the service life of the valve is further prolonged by the design.

In the pneumatic stop valve, the first annular protrusion is arranged on the outer peripheral surface of the first sealing element, the second annular protrusion is arranged on the outer peripheral surface of the second sealing element, and two ends of the spring respectively press against the first annular protrusion and the second annular protrusion.

In the pneumatic stop valve, the two ends of the spring are respectively provided with the gasket, and the two ends of the spring are respectively pressed on the side parts of the first annular bulge and the second annular bulge through the gaskets.

In foretell pneumatic stop valve, seted up mounting groove one along its circumference on the medial surface of sealing member one, seted up mounting groove two along its circumference on the medial surface of sealing member two, the embedded sealing washer one that is equipped with of mounting groove one, the embedded sealing washer two that is equipped with of mounting groove two.

In the pneumatic stop valve, an inner chamber is formed between the valve seat and the base in a surrounding mode, the first sealing element, the second sealing element and the spring are located in the inner chamber, and the valve seat is provided with an air hole which communicates the inner chamber with the outside.

The existence of the air hole enables the inner cavity to be kept smooth with the outside, the first sealing element and the second sealing element can slide on the valve rod in a sleeved mode, sliding can occur due to the existence of friction force along with the up-and-down movement of the valve rod, the sliding of the first sealing element or the second sealing element can enable the inner cavity to have the effect similar to that of a piston in an air cylinder, and therefore the existence of the air hole enables the air pressure in the inner cavity to be released, and the normal operation of the first sealing element, the second sealing element and a spring is kept.

Compared with the prior art, the product has the advantages that:

1. the two ends of the spring are respectively pressed on the first sealing element and the second sealing element to open the first sealing element and the second sealing element, the first sealing element and the second sealing element can be firmly pressed on the base and the valve seat under the action of the spring, and the trend sealing performance can be kept against even if the sealing device is used for a long time, so that the integral durability and the service life are improved.

2. The sealing mode different from filling packing can not be replaced after being filled once, the design can replace the first sealing element, the second sealing element and the spring very conveniently, and the service life of the valve can be prolonged greatly.

Drawings

Fig. 1 is a half sectional view of the present invention;

fig. 2 is a partial enlarged view of the present invention at a of fig. 1.

In the figure, 1, a valve body; 2. a valve seat; 21. a second ring groove; 211. a second inclined surface; 22. an inner chamber; 221. air holes; 3. a valve stem; 4. a cylinder; 41. a piston; 42. a base; 421. a first ring groove; 4211. a first inclined surface; 5. a first sealing element; 51. a first convex part; 52. the annular bulge I; 53. a first mounting groove; 6. a second sealing element; 61. a second convex part; 62. a second annular bulge; 63. a second mounting groove; 7. a spring; 8. a gasket; 9. a first sealing ring; 10. and a second sealing ring.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the pneumatic stop valve comprises a valve body 1, a valve seat 2, a valve rod 3 and an air cylinder 4, wherein the valve body 1 comprises a water inlet end and a water outlet end, the upper end of the valve body 1 is provided with a mounting end, the valve seat 2 is fixed on the mounting end, a valve core is arranged in the valve body 1, the upper end of the valve core is fixed with the valve rod 3, and the valve rod 3 penetrates out of the valve seat 2 from the valve seat 2. The cylinder 4 comprises a cylinder body and a base 42, the cylinder body is of a cylindrical structure with the upper end closed and the lower end opened, and the base 42 is fixed at the bottom of the cylinder body through clamping to close the bottom opening of the cylinder body. A piston 41 is arranged in the cylinder body in a sliding mode, a hole position is formed in the base 42 and can be used for a valve rod 3 to penetrate through, the valve rod 3 extends into the cylinder body from the hole position and is fixed with the piston 41, a protruding annular portion is arranged on the periphery of the hole position, and the annular portion is sleeved outside the upper end portion of the valve seat 2 and is fixedly connected with the upper end portion of the valve seat 2 in a threaded mode. The valve seat 2 and the ring-shaped part thus enclose an inner chamber 22. The first sealing element 5 and the second sealing element 6 are sleeved on the valve rod 3 of the inner chamber 22, the first sealing element 5 and the second sealing element 6 are both circumferentially sealed with the valve rod 3, a spring 7 is installed between the first sealing element 5 and the second sealing element 6 in a pressing mode, and the first sealing element 5 and the second sealing element 6 respectively abut against the base 42 and the valve seat 2 under the elastic force of the spring 7 to form sealing. According to the design, the first annular bulge 52 is arranged on the outer peripheral surface of the first sealing piece 5, the second annular bulge 62 is arranged on the outer peripheral surface of the second sealing piece 6, two ends of the spring 7 are respectively pressed on the first annular bulge 52 and the second annular bulge 62 through the gasket 8, two ends of the spring 7 are respectively pressed on the first sealing piece 5 and the second sealing piece 6 to open the first sealing piece and the second sealing piece, the first sealing piece 5 and the second sealing piece 6 can be firmly pressed on the base 42 and the valve seat 2 under the action of the spring 7, the trend sealing performance can be kept pressed against even if the sealing piece is used for a long time, and the overall durability and the service life are improved. The first sealing element 5 and the second sealing element 6 are installed on the valve rod 3 in a sleeved mode, the spring 7 is also sleeved on the valve rod 3, the installation mode is different from a sealing mode of filling and packing, the replacement processing cannot be carried out after the one-time filling, the first sealing element 5, the second sealing element 6 and the spring 7 can be replaced conveniently, and the service life of the valve can be greatly prolonged.

The first sealing element 5, the second sealing element 6 and the spring 7 are all located in the inner chamber 22, and the valve seat 2 is provided with an air hole 221 for communicating the inner chamber 22 with the outside. The existence of the air hole 221 enables the inner chamber 22 to be kept open with the outside, because the first sealing piece 5 and the second sealing piece 6 can slide on the valve rod 3, the sliding of the first sealing piece 5 or the second sealing piece 6 can cause the effect similar to the piston 41 in the cylinder 4 to occur in the inner chamber 22 along with the up-and-down movement of the valve rod 3 possibly caused by the existence of friction, and therefore the existence of the air hole 221 enables the air pressure in the inner chamber 22 to be released, and the normal operation of the first sealing piece 5, the second sealing piece 6 and the spring 7 is kept.

The base 42 is provided with a first ring groove 421 near the valve rod 3, and the upper end of the first sealing element 5 is provided with a first convex part 51 inserted into the first ring groove 421. The inner side of the valve seat 2 is provided with a second annular groove 21 near the valve rod 3, and the lower end part of the second sealing element 6 is provided with a second convex part 61 inserted into the second annular groove 21. The end part of the first convex part 51 is in a conical shape, the groove wall of the first annular groove 421 is provided with a first inclined surface 4211 matched with the conical end part of the first convex part 51, the end part of the second convex part 61 is also in a conical shape, and the groove wall of the second annular groove 21 is provided with a second inclined surface 211 matched with the conical end part of the second convex part 61. The first sealing element 5 is provided with a first convex part 51, the first convex part 51 can be inserted into the annular groove on the base 42, and the first convex part 51 is in an embedded mounting structure under the pushing action of the spring 7, so that the sealing performance between the first sealing element 5 and the base 42 is improved, and the service life of the valve can be effectively prolonged. The second convex part 61 on the second sealing part 6 has the similar effect as the first convex part 51, and the second convex part 61 can be embedded into the second annular groove 21 in the valve seat 2, so that the sealing performance between the second sealing part 6 and the valve seat 2 can be effectively improved, and the service life of the stop valve can be further prolonged. The end parts of the first convex part 51 and the second convex part 61 are in conical structures, and the groove walls of the first ring groove 421 and the second ring groove 21 are also provided with the first inclined surface 4211 and the second inclined surface 211 which are matched with the conical structures, so that the design has the advantage that the sealing performance can be effectively improved by matching the two conical structures with the first inclined surface 4211 and the second inclined surface 211 respectively under the jacking force of the spring 7, even if the first sealing element 5 and the second sealing element 6 are worn after long-time use, the inclined surface sealing is difficult to attenuate as long as the elastic force of the spring 7 is ensured, and the design further prolongs the service life of the valve.

The first mounting groove 53 has been seted up along its circumference on the medial surface of sealing member 5 of this design, has seted up two mounting grooves 63 along its circumference on the medial surface of sealing member two 6, and the embedded sealing washer 9 that is equipped with of first mounting groove 53, the embedded sealing washer two 10 that is equipped with of mounting groove two 63, the leakproofness between the assurance sealing member 5 that sealing washer 9 and two 10 of sealing washer can be better and sealing member two 6 and valve rod 3 further improves life.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A pneumatic stop valve comprises a valve body (1), a valve seat (2), a valve rod (3) and a cylinder (4), the bottom of the cylinder (4) is provided with a base (42) which is sleeved outside the upper end of the valve seat (2), the valve rod (3) penetrates through the valve seat (2) and the base (42) and extends into the cylinder (4) to be connected with a piston (41) in the cylinder (4), it is characterized in that a first sealing element (5) and a second sealing element (6) are sleeved on the valve rod (3) between the valve seat (2) and the base (42), the first sealing element (5) and the second sealing element (6) are both sealed with the valve rod (3) in the circumferential direction, a spring (7) is arranged between the first sealing element (5) and the second sealing element (6) in a pressing way, the first sealing element (5) and the second sealing element (6) respectively press against the base (42) and the valve seat (2) under the action of the elastic force of the spring (7) to form sealing.

2. A pneumatic stop valve according to claim 1, wherein the base (42) is provided with a first annular groove (421) near the valve stem (3), and the upper end of the first sealing member (5) is provided with a first convex part (51) inserted into the first annular groove (421).

3. A pneumatic stop valve according to claim 2, wherein a second annular groove (21) is formed in the vicinity of the position close to the valve rod (3) on the inner side of the valve seat (2), and a second convex portion (61) inserted into the second annular groove (21) is formed at the lower end of the second sealing member (6).

4. A pneumatic stop valve as claimed in claim 3, wherein the end of the first projection (51) is tapered, the groove wall of the first groove (421) has a first inclined surface (4211) which cooperates with the tapered end of the first projection (51), the end of the second projection (61) is tapered, and the groove wall of the second groove (21) has a second inclined surface (211) which cooperates with the tapered end of the second projection (61).

5. A pneumatic stop valve according to claim 4, characterized in that the first sealing element (5) is provided with a first annular protrusion (52) on the outer peripheral surface thereof, the second sealing element (6) is provided with a second annular protrusion (62) on the outer peripheral surface thereof, and the two ends of the spring (7) are respectively pressed against the first annular protrusion (52) and the second annular protrusion (62).

6. A pneumatic stop valve according to claim 5, characterised in that both ends of the spring (7) are provided with a gasket (8), and both ends of the spring (7) are respectively pressed against the side parts of the first annular projection (52) and the second annular projection (62) through the gaskets (8).

7. The pneumatic stop valve according to claim 6, wherein a first mounting groove (53) is formed in the inner side surface of the first sealing member (5) along the circumferential direction of the first sealing member, a second mounting groove (63) is formed in the inner side surface of the second sealing member (6) along the circumferential direction of the second sealing member, a first sealing ring (9) is embedded in the first mounting groove (53), and a second sealing ring (10) is embedded in the second mounting groove (63).

8. The pneumatic stop valve according to any one of claims 1 to 7, wherein an inner chamber (22) is formed by surrounding the valve seat (2) and the base (42), the first sealing element (5), the second sealing element (6) and the spring (7) are all located in the inner chamber (22), and the valve seat (2) is provided with an air hole (221) for communicating the inner chamber (22) with the outside.