CN214534687U

CN214534687U - Lever safety valve

Info

Publication number: CN214534687U
Application number: CN202120411002.5U
Authority: CN
Inventors: 廖阳军
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-18
Filing date: 2021-02-18
Publication date: 2021-10-29
Anticipated expiration: 2031-02-18

Abstract

The utility model relates to a lever safety valve, which comprises a valve body, a valve core, a support rod, a stop rod, a lever, a guide component and a heavy hammer; the valve core is provided with an ejection part; the supporting rod and the blocking rod are respectively positioned at two opposite sides of the valve core; the lever is hinged on the supporting rod, longitudinally moves in the blocking rod and is abutted against the ejection part; the guide assembly comprises a return spring and a guide rod, two ends of the return spring are respectively connected with the lever and the valve body, and the guide rod is arranged on the lever; the weight is arranged at one end of the lever far away from the valve core. The lever safety valve enables the valve core to have pressing force after the lever is abutted to the valve core through the weight of the heavy hammer on the lever, and adjusts the working pressure of the safety valve through adjusting the position of the heavy hammer.

Description

Lever safety valve

Technical Field

The utility model relates to a relief valve technical field especially relates to a lever relief valve.

Background

The safety valve is a special valve, wherein the opening and closing part is in a normally closed state under the action of external force, and when the pressure of a medium in equipment or a pipeline rises to exceed a specified value, the medium is discharged to the outside of the system to prevent the pressure of the medium in the pipeline or the equipment from exceeding the specified value. The safety valve is mainly used for boiler, pressure container and pipeline, and its control pressure is not greater than specified value, so that it can play important role in protecting personal safety and equipment operation.

The lever-type safety valve is one of safety valves, and is a safety valve with a valve seat closed by transmitting the acting force of a lever and a heavy hammer to a valve clack, and the principle is as follows: the pressure medium is under the valve clack, when the medium pressure exceeds the specified value, the valve clack is jacked up and discharged to the outside, the weight and the position of the heavy hammer are changed, namely the pressing force on the valve clack is changed, and the working pressure of the safety valve can be adjusted. The lever-type safety valve has the advantages of simple structure, easy and accurate adjustment, no obvious increase of the applied load along with the rise of the valve clack, and no influence of high temperature on the action and performance; but its disadvantages are also evident: the valve clack is easy to deflect when returning to the seat, so that the valve clack is easy to leak after being opened, and the recovery of production is influenced.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a lever safety valve to solve the above conventional problems, in which the valve flap is not easily deflected when returning to the seat, and is easily closed and tightly maintained after opening, so that the pressure relief threshold of the safety valve is maintained in a relatively stable state.

In order to realize the utility model discloses a purpose, the utility model discloses a following technical scheme:

a lever safety valve comprises a valve body, a valve core, a supporting rod, a blocking rod, a lever, a guide assembly and a heavy hammer, wherein the valve core, the supporting rod, the blocking rod, the lever, the guide assembly and the heavy hammer are arranged on the valve body; the valve core is provided with an ejection part which protrudes outwards from the top of the valve body; the supporting rod and the blocking rod are respectively positioned at two opposite sides of the valve core; the lever is hinged on the supporting rod, longitudinally moves in the blocking rod and is abutted against the ejection part; the guide assembly comprises a return spring and a guide rod sleeved in the return spring, two ends of the return spring are respectively connected with the lever and the valve body, and the guide rod is arranged on the lever; the weight is arranged at one end of the lever, which is far away from the valve core.

The lever safety valve is provided with the valve body, the valve core, the supporting rod, the blocking rod, the lever, the guide assembly and the heavy hammer, the weight of the heavy hammer on the lever enables the valve core to have pressing force after the lever is abutted to the valve core, the working pressure of the safety valve is adjusted by adjusting the position of the heavy hammer, and after the safety valve is opened, the valve core is not prone to deflection when returning to a seat due to the action of the guide assembly and keeps tight, so that the pressure relief threshold value of the safety valve is kept in a stable state.

In one embodiment, the valve body has a through hole therein that mates with the guide rod.

In one embodiment, the number of the guide assemblies is two, and each guide assembly is respectively positioned at two opposite sides of the valve core.

In one embodiment, the ejecting part is provided with a conical surface, and the lever is provided with a groove matched with the conical surface.

In one embodiment, a plurality of clamping grooves are formed in one end of the lever, and the clamping grooves are transversely and uniformly distributed.

In one embodiment, the weight is provided with an adjusting sleeve sleeved on the lever, the adjusting sleeve is provided with a positioning rod, and the positioning rod penetrates through the adjusting sleeve and abuts against the clamping groove.

In one embodiment, the weight is further provided with a mounting rod connected with the adjusting sleeve, and the mounting rod is in threaded connection with the weight.

In one embodiment, the valve body comprises a valve seat, a valve cover arranged on the valve seat, an air inlet pipe and an air outlet pipe; the air inlet pipe protrudes outwards from the valve seat; the exhaust pipe and the air inlet pipe are vertically arranged.

In one embodiment, the inlet pipe is fitted with a sealing sleeve on an outward projection of the valve seat.

In one embodiment, the sealing sleeve has an outer diameter greater than an outer diameter of the air inlet tube.

Drawings

Fig. 1 is a schematic structural view of a lever safety valve of the present invention;

fig. 2 is an enlarged view of a point a shown in fig. 1.

Reference is made to the accompanying drawings in which:

10. a valve body; 11. a valve seat; 12. a valve housing; 13. an air inlet pipe; 130. sealing sleeves; 14. an exhaust pipe; 20. A valve core; 21. a push-out part; 30. a support bar; 40. a blocking lever; 50. a lever; 51. a clamping groove; 60. A guide assembly; 61. a return spring; 62. a guide bar; 70. a weight; 71. an adjusting sleeve; 72. positioning a rod; 73. and (5) installing a rod.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 and 2, a safety valve 50 according to a preferred embodiment of the present invention is used for releasing medium pressure in equipment or a pipeline when the medium pressure exceeds a predetermined value, and specifically, the safety valve 50 includes a valve body 10, a valve core 20 mounted on the valve body 10, a support rod 30, a stop rod 40, a lever 50 connected to the support rod 30, a guide assembly 60 connected to the lever 50, and a weight 70; the valve core 20 is provided with an ejecting part 21 protruding outwards from the top of the valve body 10; the support rod 30 and the blocking rod 40 are respectively positioned at two opposite sides of the valve core 20; the lever 50 is hinged on the support rod 30, longitudinally moves in the blocking rod 40 and is abutted with the ejection part 21; the guide assembly 60 comprises a return spring 61 and a guide rod 62 sleeved in the return spring 61, two ends of the return spring 61 are respectively connected with the lever 50 and the valve body 10, and the guide rod 62 is installed on the lever 50; the weight 70 is mounted on an end of the lever 50 away from the valve core 20.

The lever 50 safety valve is provided with the valve body 10, the valve core 20, the support rod 30, the blocking rod 40, the lever 50, the guide assembly 60 and the weight 70, the weight of the weight 70 on the lever 50 is used for enabling the valve core 20 to have pressing force after the lever 50 is abutted to the valve core 20, the position of the weight 70 is adjusted for adjusting the working pressure of the safety valve, and after the safety valve is opened, the valve core 20 is not easy to deflect when returning to the seat due to the action of the guide assembly 60 and keeps tight, so that the pressure relief threshold value of the safety valve is kept in a relatively stable state.

The valve body 10 comprises a valve seat 11, a valve cover 12 arranged on the valve seat 11, an air inlet pipe 13 and an air outlet pipe 14; the air inlet pipe 13 protrudes outwards from the valve seat 11; the exhaust pipe 14 is perpendicular to the intake pipe 13. The valve seat 11 is used for being installed on equipment or a pipeline, the valve cover 12 is covered on the valve core 20, when the pressure in the equipment exceeds a set value, the valve core 20 jumps to enable the lever 50 to slide in the blocking rod 40, and the air inlet pipe 13 is communicated with the air outlet pipe 14, so that high-pressure air is discharged outwards through the air outlet pipe 14. In one embodiment, the intake pipe 13 is fitted with a sealing sleeve 130 on an outward projection of the valve seat 11, the sealing sleeve 130 having an outer diameter greater than that of the intake pipe 13. The protruding part of the air inlet pipe 13 is inserted into the pipeline of the equipment, so that the sealing performance of the safety valve is better, and the sealing performance of the safety valve is optimal through the sealing sleeve 130.

The valve body 10 has a through hole matching the guide rod 62.

The number of the guide assemblies 60 is two, and each guide assembly 60 is respectively positioned at two opposite sides of the valve core 20. In one embodiment, the ejecting portion 21 has a conical surface, and the lever 50 has a groove matching the conical surface.

One end of the lever 50 is provided with a plurality of clamping grooves 51, and the clamping grooves 51 are transversely and uniformly distributed.

The weight 70 is provided with an adjusting sleeve 71 sleeved on the lever 50, the adjusting sleeve 71 is provided with a positioning rod 72, and the positioning rod 72 penetrates through the adjusting sleeve 71 and abuts against the clamping groove 51. In one embodiment, the weight 70 is further provided with a mounting rod 73 connected with the adjusting sleeve 71, and the mounting rod 73 is in threaded connection with the weight 70.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A lever safety valve is characterized by comprising a valve body, a valve core, a supporting rod, a blocking rod, a lever, a guide assembly and a heavy hammer, wherein the valve core is arranged on the valve body; the valve core is provided with an ejection part which protrudes outwards from the top of the valve body; the supporting rod and the blocking rod are respectively positioned at two opposite sides of the valve core; the lever is hinged on the supporting rod, longitudinally moves in the blocking rod and is abutted against the ejection part; the guide assembly comprises a return spring and a guide rod sleeved in the return spring, two ends of the return spring are respectively connected with the lever and the valve body, and the guide rod is arranged on the lever; the weight is arranged at one end of the lever, which is far away from the valve core.

2. A lever relief valve as set forth in claim 1 wherein said valve body has a through bore therethrough mating with said pilot stem.

3. The lever relief valve of claim 1, wherein the number of the pilot assemblies is two, each located on opposite sides of the spool.

4. The lever relief valve of claim 1, wherein the raised portion has a tapered surface thereon, and the lever has a groove thereon that mates with the tapered surface.

5. The lever safety valve of claim 1, wherein the lever has a plurality of catching grooves formed in one end thereof, and the catching grooves are uniformly distributed in a lateral direction.

6. The lever safety valve of claim 5, wherein the weight is provided with an adjusting sleeve sleeved on the lever, the adjusting sleeve is provided with a positioning rod, and the positioning rod is inserted into the adjusting sleeve and abuts against the clamping groove.

7. The lever-type safety valve as claimed in claim 6, wherein the weight is further provided with a mounting rod connected with the adjusting sleeve, and the mounting rod is in threaded connection with the weight.

8. The lever-type safety valve of claim 1, wherein the valve body includes a valve seat, a valve cover mounted on the valve seat, an intake pipe, and an exhaust pipe; the air inlet pipe protrudes outwards from the valve seat; the exhaust pipe and the air inlet pipe are vertically arranged.

9. The lever-type safety valve of claim 8, wherein said intake tube is fitted with a sealing sleeve on an outward projection of said valve seat.

10. The lever relief valve of claim 9, wherein the sealing boot has an outer diameter greater than an outer diameter of the intake tube.