CN219198246U

CN219198246U - Safety valve

Info

Publication number: CN219198246U
Application number: CN202320299293.2U
Authority: CN
Inventors: 金根喜
Original assignee: Taizhou Meiyadi Fluid Intelligent Control Co ltd
Current assignee: Zhejiang Meiyadi Fluid Intelligent Control Co ltd
Priority date: 2023-02-23
Filing date: 2023-02-23
Publication date: 2023-06-16
Anticipated expiration: 2033-02-23

Abstract

The utility model provides a safety valve, and belongs to the technical field of valve manufacturing. It has solved the not good scheduling problem of current relief valve suitability. The safety valve comprises a valve body and a valve rod, wherein the valve body axially penetrates through the valve body, a discharge hole communicated with the connection hole is formed in the side portion of the valve body, a section of connection section which is an internal thread is formed in the top portion of the connection hole, a lock cap is connected to the connection section in a threaded mode, the outer wall of the inner end of the valve rod is a conical surface I, a blocking shoulder is arranged on the inner wall of the connection hole, the valve rod is provided with a convex ring which protrudes outwards in the radial direction, the top surface of the convex ring is a conical surface II, when the conical surface II abuts against the lock cap, the connection hole is communicated with the discharge hole, a sealing ring I is embedded in the valve rod, an explosion-proof hole communicated with the connection hole is formed in the side portion of the valve body, the blocking shoulder is located between the inner end of the discharge hole and the inner end of the explosion-proof hole, the inner end of the explosion-proof hole is lower than the inner end of the discharge hole, and an explosion-proof structure for discharging overpressure medium in the connection hole is arranged in the explosion-proof hole. The utility model has the advantages of good sealing performance, good applicability and the like.

Description

Safety valve

Technical Field

The utility model belongs to the technical field of valve manufacturing, and particularly relates to a safety valve.

Background

When the safety valve is applied to a pipeline, when the pressure of the medium in the equipment or the pipeline exceeds a preset value, the medium can be discharged to the outside, so that the pipeline or the equipment is prevented from being damaged, and the potential safety hazard is reduced.

For example, chinese patent literature discloses a relief valve and relief valve assembly [ application number: 202022498513.3; authorized bulletin number: CN213685427U ], the relief valve includes valve body and valve seat connected along the axial direction, the valve body has first mounting hole along the axial direction, the valve seat has second mounting hole along the axial direction, the first mounting hole and second mounting hole are connected to define the sliding cavity, the sidewall of the sliding cavity has liquid outlet through hole, and the sliding cavity has sealing stop block; the valve core is hermetically slipped in the sliding cavity, a liquid passing hole is formed in the valve core, and the liquid passing hole, the first mounting hole and the second mounting hole are communicated to define a liquid passing channel; the elastic piece is arranged in the sliding cavity in a compression mode and is positioned on one side, facing away from the sealing stop block, of the valve core, the valve core can be arranged in the sliding cavity in a sliding mode, and cuts off a liquid passing channel and a liquid outlet through hole when the valve core slides to be in sealing butt against the sealing stop block, and the first cross section area, located on one side, facing the sealing stop block, of the valve core on the liquid passing channel is larger than the second cross section area, facing away from the sealing stop block, of the valve core.

The safety valve can enable the medium to pass through the liquid passing channel under the closed state of the valve core, is favorable for reducing the pressure difference of the medium at two sides of the valve core, further reduces the requirement on the elastic piece, reduces the assembly difficulty, but has a complex structure and cannot be applied to pipelines requiring a normally open state.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a safety valve with simple structure, good sealing performance and good applicability.

The aim of the utility model can be achieved by the following technical scheme: the utility model provides a safety valve, includes valve body and valve rod, the valve body axial run through have the connecting hole, the valve body lateral part have the discharge port that communicates in the connecting hole, its characterized in that, the top department of connecting hole have one section for the internal screw thread link, link threaded connection have the locking cap, the inner of valve rod stretch into the connecting hole and the inner outer wall of valve rod be conical surface one, the inner wall of connecting hole has radial inwards protruding and supplies the fender shoulder that conical surface was contradicted, the outer end axial of valve rod wears out the locking cap, the valve rod has radial outwards protruding and with link threaded connection's bulge loop, bulge loop is conical surface two towards the top surface of locking cap, connecting hole and discharge port be linked together when conical surface two are contradicted in the locking cap, sealing washer one is located between the inner of bulge loop and valve rod and sealing washer one and is sealed in the inner wall of connecting hole, the valve body lateral part have the explosion-proof hole that communicates in the connecting hole, the fender shoulder be located between the inner of discharge port and the inner of explosion-proof hole, the inner of explosion-proof hole is less than the inner of discharge port is equipped with the explosion-proof medium structure that will be exploded in the connecting hole.

In the safety valve, the explosion-proof structure comprises the gasket and the plug, the plug is in threaded connection with the explosion-proof hole, the inner wall of the explosion-proof hole is provided with the step, the gasket is located between the plug and the step of the explosion-proof hole and is abutted by the inner end of the plug, the inner end of the plug is provided with the axial blind hole, and the plug extends out of the outer wall of the valve body to form the through hole communicated with the blind hole.

As another aspect, in the above-mentioned safety valve, the explosion-proof structure includes a check valve element provided in the explosion-proof hole. The unidirectional valve core is of an existing structure, and is not described in detail herein, the unidirectional valve core is kept in a sealing state at ordinary times, when the medium in the connecting hole is overpressured, the overpressure medium impacts the unidirectional valve core, the unidirectional valve core is opened to discharge the medium, the pipelines and parts on the pipelines are prevented from being damaged, and when the medium in the connecting hole is restored to normal pressure, the unidirectional valve core is kept in a sealing state again.

In the above safety valve, the valve rod is embedded with a second sealing ring sealed on the lock cap, and the number of the first sealing ring is at least two.

In the safety valve, the side part of the valve body is provided with a pressure measuring hole communicated with the connecting hole, the inner end of the pressure measuring hole is lower than the stop shoulder, and the pressure measuring hole is connected with a pressure measuring joint.

In the above safety valve, the discharge hole is screwed with a pipe joint.

Compared with the prior art, the safety valve has the advantages of simple structure, good sealing performance, long service life and good applicability.

Drawings

Fig. 1 is a perspective view of the safety valve.

Fig. 2 is a top view of the structure of the safety valve.

Fig. 3 is a cross-sectional view of the structure of section A-A in fig. 2.

Fig. 4 is a structural cross-sectional view of section B-B of fig. 2.

Fig. 5 is a structural cross-sectional view of section C-C of fig. 2.

In the figure, 1, a valve body; 2. a valve stem; 3. a connection hole; 4. a discharge hole; 5. a connection section; 6. a locking cap; 7. a conical surface I; 8. a shoulder; 9. a convex ring; 10. a conical surface II; 11. a first sealing ring; 12. explosion-proof holes; 13. a gasket; 14. a plug; 141. a blind hole; 142. a through hole; 15. a second sealing ring; 16. a pressure measuring hole; 17. a pressure measuring joint; 18. a pipe joint.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, this safety valve includes valve body 1 and valve rod 2, valve body 1 axial runs through has connecting hole 3, valve body 1 lateral part has the discharge port 4 that communicates in connecting hole 3, the top department of connecting hole 3 has one section to be internal screw thread link 5, link 5 threaded connection has locking cap 6, the inner of valve rod 2 stretches into connecting hole 3 and the inner outer wall of valve rod 2 is conical surface one 7, the inner wall of connecting hole 3 has radial inwards protruding and supplies the fender shoulder 8 that conical surface one 7 contradicts, the outer end axial of valve rod 2 wears out locking cap 6, the outer end of valve rod 2 has the interior hexagonal hole of axial concave, interior hexagonal hole supplies the socket wrench grafting, be convenient for rotate valve rod 2. The valve rod 2 has radial evagination and with link 5 threaded connection's bulge loop 9, bulge loop 9 is conical surface two 10 towards the top surface of locking cap 6, when conical surface two 10 conflict in locking cap 6, connecting hole 3 and discharge port 4 are linked together, valve rod 2 inlays and is equipped with sealing washer one 11, sealing washer one 11 is located between bulge loop 9 and the inner of valve rod 2 and sealing washer one 11 seals in the inner wall of connecting hole 3, valve body 1 lateral part has explosion-proof hole 12 that communicates in connecting hole 3, keep off shoulder 8 and be located between the inner of discharge port 4 and the inner of explosion-proof hole 12, the inner of explosion-proof hole 12 is less than the inner of discharge port 4, be equipped with the explosion-proof structure with the interior superpressure medium of connecting hole 3 discharge in the explosion-proof hole 12.

The safety valve does not need a valve core and an elastic piece, and simplifies the structure. When the anti-explosion valve is used, when the conical surface I7 at the inner end of the valve rod 2 is abutted against the stop shoulder 8, the sealing of the conical surface is realized, the sealing is in a normally closed state, the connecting hole 3 is communicated with the anti-explosion hole 12, the discharging hole 4 is not communicated with the connecting hole 3, and when the pressure of medium in the connecting hole 3 exceeds the set limit pressure, the anti-explosion structure discharges the overpressure medium in the connecting hole 3 from the anti-explosion hole 12, so that a pipeline and parts on the pipeline are prevented from being damaged, and the use safety is ensured; when the valve rod 2 is rotated, when the conical surface II 10 of the convex ring 9 is abutted against the lock cap 6, conical surface sealing is realized, the valve is in a normally open state, the connecting hole 3 is communicated with the discharge hole 4, the connecting hole 3 is communicated with the explosion-proof hole 12, and when the pressure of medium in the connecting hole 3 exceeds the set limit pressure, the explosion-proof structure discharges the overpressure medium in the connecting hole 3 from the explosion-proof hole 12, so that a pipeline and parts on the pipeline are prevented from being damaged, and the use safety is ensured; the safety valve is suitable for a normally open or normally closed pipeline, has good applicability, and in the use process, the conical surface I7 and the conical surface II 10 realize conical surface sealing, and the sealing ring I11 is matched, so that the sealing performance is ensured, and the medium cannot leak from the valve rod 2 and the connecting hole 3.

Further, in this embodiment, the explosion-proof structure includes a spacer 13 and a plug 14, the plug 14 is in threaded connection with the explosion-proof hole 12, the inner wall of the explosion-proof hole 12 has steps, the spacer 13 is located between the steps of the plug 14 and the explosion-proof hole 12, the spacer 13 is abutted by the inner end of the plug 14, an axial blind hole 141 is formed in the inner end of the plug 14, and a through hole 142 communicated with the blind hole 141 is formed in the outer wall of the plug 14 extending out of the valve body 1. The maximum pressure born by the gasket 13 is a set limit pressure value, when the medium pressure in the connecting hole 3 exceeds the set limit pressure, the gasket 13 is broken, and the medium in the connecting hole 3 flows into the blind hole 141 and is discharged from the through hole 142, so that the damage of a pipeline and parts on the pipeline is avoided.

The valve rod 2 is embedded with the sealing ring II 15 sealed in the lock cap 6, the number of the sealing rings I11 is two, the sealing ring II 15 ensures the tightness between the valve rod 2 and the lock cap 6, the sealing ring I11 forms multiple seals, and the tightness between the valve rod 2 and the connecting hole 3 is good. The lateral part of the valve body 1 is provided with a pressure measuring hole 16 communicated with the connecting hole 3, the inner end of the pressure measuring hole 16 is lower than the stop shoulder 8, the pressure measuring hole 16 is connected with a pressure measuring joint 17, the pressure measuring joint 17 is connected with a pressure gauge, the medium pressure in the connecting hole 3 can be visually displayed, and the regulation and control are convenient. The pipe joint 18 is connected with the discharge hole 4 in a threaded manner, so that the connection is convenient, and the practicability is good.

What is not described in detail in this specification is prior art known to those skilled in the art. The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The safety valve comprises a valve body (1) and a valve rod (2), wherein the valve body (1) axially penetrates through the valve body (1) and is provided with a connecting hole (3), the side part of the valve body (1) is provided with a discharge hole (4) communicated with the connecting hole (3), the safety valve is characterized in that the top part of the connecting hole (3) is provided with a connecting section (5) with internal threads, the connecting section (5) is in threaded connection with a locking cap (6), the inner end of the valve rod (2) stretches into the connecting hole (3) and the outer wall of the inner end of the valve rod (2) is provided with a conical surface I (7), the inner wall of the connecting hole (3) is provided with a stop shoulder (8) protruding inwards in a radial direction and for the conical surface I (7) to collide, the outer end of the valve rod (2) axially penetrates out of the locking cap (6), the valve rod (2) is provided with a convex ring (9) protruding outwards in a radial direction and connected with the connecting section (5), the top surface of the convex ring (9) faces the locking cap (6) to be a conical surface II (10), when the conical surface II (10) is in contact with the locking cap (6), the connecting hole (3) and the inner end of the valve rod (2) is provided with the first sealing ring (11) and the inner end of the valve rod (2) is provided with a sealing ring (11), the side of the valve body (1) is provided with an explosion-proof hole (12) communicated with the connecting hole (3), the blocking shoulder (8) is positioned between the inner end of the discharge hole (4) and the inner end of the explosion-proof hole (12), the inner end of the explosion-proof hole (12) is lower than the inner end of the discharge hole (4), and the explosion-proof hole (12) is internally provided with an explosion-proof structure for discharging overpressure medium in the connecting hole (3).

2. The safety valve according to claim 1, wherein the explosion-proof structure comprises a gasket (13) and a plug (14), the plug (14) is in threaded connection with the explosion-proof hole (12), the inner wall of the explosion-proof hole (12) is provided with steps, the gasket (13) is located between the plug (14) and the steps of the explosion-proof hole (12) and is abutted against the inner end of the plug (14), an axial blind hole (141) is formed in the inner end of the plug (14), and a through hole (142) communicated with the blind hole (141) is formed in the outer wall of the plug (14) extending out of the valve body (1).

3. A safety valve according to claim 1, wherein the explosion-proof structure comprises a one-way valve element provided in the explosion-proof hole (12).

4. A safety valve according to claim 1, 2 or 3, wherein the valve rod (2) is embedded with two sealing rings (15) sealed to the locking cap (6), and the number of the first sealing rings (11) is at least two.

5. The safety valve according to claim 4, wherein the side part of the valve body (1) is provided with a pressure measuring hole (16) communicated with the connecting hole (3), the inner end of the pressure measuring hole (16) is lower than the shoulder (8), and the pressure measuring hole (16) is connected with a pressure measuring joint (17).

6. A safety valve according to claim 5, characterized in that the outlet opening (4) is screwed with a pipe connection (18).