CN212775773U

CN212775773U - Pressure regulating safety valve

Info

Publication number: CN212775773U
Application number: CN202020950353.9U
Authority: CN
Inventors: 姚晓峰; 左超杰
Original assignee: Suzhou Yuanshang Precision Machinery Co ltd
Current assignee: Suzhou Yuanshang Precision Machinery Co ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-03-23
Anticipated expiration: 2030-05-29

Abstract

The utility model discloses a pressure regulating relief valve, which comprises a valve core, elastic component and valve barrel, the case is acceptd in the valve barrel, the valve barrel is equipped with oil inlet and oil-out, the pressure regulating relief valve still includes pressure regulating bolt and coupling nut, the pressure regulating bolt passes through the screw thread and is connected with coupling nut, the elastic component both ends are contradicted with case and pressure regulating bolt respectively, the case is equipped with the bearing surface, the cross-section of bearing surface is the slash, the valve barrel is equipped with conflict portion, the elastic component makes the bearing surface contradict with conflict portion and makes oil inlet and oil-out disconnection, pressure regulating bolt relative coupling nut rotates and then compresses tightly or transfers the jump pressure of pine elastic component and then adjustment relief valve, and the.

Description

Pressure regulating safety valve

Technical Field

The utility model relates to a relief valve especially relates to a pressure regulating relief valve.

Background

The safety valve is generally installed on equipment or pipelines of a closed system to protect the safety of the system. When the pressure or the temperature in the equipment or the pipeline exceeds the set pressure of the safety valve, the pressure relief or the temperature reduction is automatically started, the pressure (temperature) of a medium in the equipment or the pipeline is ensured to be below the set pressure (temperature), the equipment and the pipeline are protected to normally work, accidents are prevented, and the loss is reduced.

The safety valve of the power station generally requires that the recoil pressure difference (the pressure difference between the full-open of the take-off stroke of the safety valve and the recoil of the sealing surface of the safety valve to form a seal) is less than 10 percent (see the safety specification of a boiler). In order to avoid frequent tripping and misoperation of the safety valve under the fluctuation working condition caused by too small recoil pressure difference, the setting pressure is generally not lower than 1.03 times of the working pressure. The discharge amount and the discharge reaction force of the safety valve were calculated based on 1.03 times.

In the prior art, if the pressure of the safety valve is regulated, an assembler rotates a force application rod or a movable wrench to contract and enlarge a spring, so that the valve jump pressure is regulated. The method occupies a large space and wastes time and labor when being implemented; under the condition of high setting pressure, the valve clack in the valve body rotates along with the valve body to strain a sealing surface; during pressure regulation, the spring can generate torsion force and even twist, so that the valve sealing force is deflected to cause valve leakage.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a pressure regulating safety valve which is not damaged during the pressure regulation and is simple in operation.

The purpose of the utility model is realized by adopting the following technical scheme:

the utility model provides a pressure regulating relief valve, includes case, elastic component and valve barrel, the case accept in the valve barrel, the valve barrel is equipped with oil inlet and oil-out, the pressure regulating relief valve still includes pressure regulating bolt and coupling nut, coupling nut install in the valve barrel is terminal, the pressure regulating bolt pass through the screw thread with coupling nut connects, the elastic component both ends respectively with the case reaches the pressure regulating bolt is contradicted, the case is equipped with the bearing surface, the cross-section of bearing surface is the slash, the valve barrel is equipped with conflict portion, the elastic component makes the bearing surface with conflict portion makes the oil inlet with the oil-out disconnection, the pressure regulating bolt is relative the valve barrel removes and then compresses tightly or transfers the pine the elastic component and then adjusts the jump pressure of relief valve.

Further, the pressure bearing surface is a circular truncated cone side surface.

Furthermore, the valve core further comprises a head part and a neck part, the neck part is located between the head part and the pressure bearing surface, an oil inlet cavity is formed between the neck part and the inner wall of the valve sleeve, and the oil inlet cavity is communicated with the oil inlet.

Furthermore, an oil inlet channel is formed between the oil inlet and the oil inlet cavity, and the oil inlet channel is linear and forms an included angle with the horizontal plane.

Further, the valve core further comprises an installation part and a step surface, the step surface is formed between the installation part and the pressure bearing surface, and the elastic piece is sleeved on the installation part and abutted against the step surface.

Further, the elastic member is a spring.

Further, the pressure regulating bolt is provided with a limiting step, the limiting step is abutted to the end part of the connecting nut, and the pressure regulating bolt is prevented from being separated from the connecting nut.

Further, the pressure regulating bolt is provided with a sealing groove, the pressure regulating safety valve comprises a sealing ring, and the sealing ring is arranged in the sealing groove to enable the pressure regulating bolt and the valve sleeve to be sealed.

Compared with the prior art, the utility model discloses the pressure regulating relief valve still includes pressure regulating bolt and coupling nut, coupling nut installs in the valve barrel terminal, the pressure regulating bolt passes through the screw thread and is connected with coupling nut, the elastic component both ends are contradicted with case and pressure regulating bolt respectively, the case is equipped with the bearing surface, the cross-section of bearing surface is the slash, the valve barrel is equipped with conflict portion, the elastic component makes the bearing surface contradict with conflict portion and makes oil inlet and oil-out disconnection, the relative valve barrel of pressure regulating bolt removes and then compresses tightly or transfers the jump pressure of pine elastic component and then adjustment relief valve, and the operation is simple, damage free relief valve.

Drawings

FIG. 1 is a perspective view of the pressure regulating safety valve of the present invention;

FIG. 2 is a cross-sectional view of the pressure regulating safety valve of FIG. 1;

FIG. 3 is a perspective view of a valve cartridge of the pressure regulating relief valve of FIG. 1;

FIG. 4 is a perspective view of a gasket of the pressure regulating relief valve of FIG. 1;

FIG. 5 is a perspective view of the valve housing of the pressure regulating safety valve of FIG. 1;

fig. 6 is a perspective view of a pressure regulating bolt of the pressure regulating safety valve of fig. 1.

In the figure: 10. a valve core; 11. a head portion; 12. a neck portion; 13. a pressure bearing face; 14. an installation part; 15. a step surface; 20. a gasket; 21. a housing portion; 22. an extension portion; 23. an edge; 30. an elastic member; 40. a valve housing; 41. an oil inlet; 42. an oil outlet; 43. a contact part; 44. an accommodating cavity; 45. a sealing wall; 46. a connecting wall; 50. a pressure regulating bolt; 51. a sealing groove; 52. a limiting step; 60. a connecting nut; 70. a locknut; 80. and (5) sealing rings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when a structure is referred to as being "secured to" another structure, it can be directly on the other structure or intervening structures may also be present, secured by the intervening structures. When a structure is referred to as being "connected" to another structure, it can be directly connected to the other structure or intervening structures may also be present. When a structure is referred to as being "disposed on" another structure, it can be directly on the other structure or intervening structures may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

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. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 6, in order to illustrate an embodiment of the pressure regulating safety valve of the present invention, the pressure regulating safety valve includes a valve core 10, a gasket 20, an elastic member 30, a valve sleeve 40, a pressure regulating bolt 50, a coupling nut 60, a lock nut 70, and a sealing ring 80.

The valve cartridge 10 includes a head portion 11, a neck portion 12, a pressure receiving face 13, and a mounting portion 14. A step face 15 is formed between the pressure receiving face 13 and the mounting portion 14. Neck 12 is located between head 11 and pressure bearing face 13. The pressure bearing surface 13 is a circular truncated cone side surface. The pressure bearing face 13 is diagonal in cross section.

The gasket 20 includes a sleeve portion 21, an extending portion 22 and a rim 23. The sleeve portion 21, the extending portion 22 and the edge 23 are integrally formed. The extending portion 22 is located between the engaging portion 21 and the edge 23. The extension 22 is recessed inwardly to form a groove.

The elastic member 30 is a spring.

The valve housing 40 is provided with an oil inlet 41, an oil outlet 42, an interference portion 43, a housing chamber 44, a sealing wall 45, and a connecting wall 46. An oil inlet passage is formed between the oil inlet 41 and the interior of the valve housing 40. The oil inlet channel is in a linear shape and forms an included angle with the horizontal plane. The number of the oil inlets 41 is multiple, and the multiple oil inlets 41 are uniformly distributed at the end of the valve sleeve 40. The number of the oil outlets 42 is plural, and the plural oil outlets 42 are uniformly distributed on the side portion of the valve housing 40. The interference portion 43 is located between the oil inlet 41 and the oil outlet 42. The abutting portion 43 is at a right angle, and the abutting portion 43 is in line contact with the pressure receiving face 13. The connecting wall 46 is internally threaded.

The pressure adjusting bolt 50 is provided with a seal groove 51, a limit step 52 and an external thread.

The locknut 70 is provided with external threads and internal threads.

When the pressure regulating safety valve is assembled, the gasket 20 is sleeved on the mounting part 14 of the valve core 10, the valve core 10 is accommodated in the valve sleeve 40, and the external thread of the locknut 70 is matched with the internal thread of the valve sleeve 40 so that the locknut 70 is fixed on the end part of the valve sleeve 40. The seal ring 80 is fitted over the pressure adjusting bolt 50. One end of the elastic member 30 is received in the pressure adjusting bolt 50. The pressure adjusting bolt 50 and the elastic member 30 are installed into the locknut 70 and the valve housing 40. At this time, the external thread of the pressure-regulating bolt 50 is engaged with the internal thread of the locknut 70, so that the pressure-regulating bolt 50 can rotate relative to the locknut 70 and move in the valve housing 40. The other end of the elastic element 30 is abutted with the valve core 10 to provide the tripping pressure for the safety valve. The coupling nut 60 is attached to the end of the pressure adjusting bolt 50 to fasten the pressure adjusting bolt 50.

In the initial state, the abutting portion 43 abuts against the pressure bearing face 13, and the oil inlet 41 is disconnected from the oil outlet 42. When the oil inlet 41 enters oil, the pressure in the oil inlet cavity is increased, and thrust is generated on the pressure bearing surface 13. At this time, the valve body 10 receives both the thrust of the pressure receiving surface 13 and the elastic force of the elastic member 30. When the thrust of the pressure-bearing surface 13 reaches the jump pressure (greater than the elastic force of the elastic element 30), the valve core 10 moves to the right, the abutting part 43 is separated from the pressure-bearing surface 13, the oil inlet 41 is communicated with the oil outlet 42, oil flows in from the oil inlet 41, impacts the extension part 22 of the gasket 20, so that the gasket 20 drives the valve core 10 to move backwards continuously, the flow cross-sectional area of the oil is increased, and the oil flows out from the oil outlet 42 rapidly. When the system pressure falls back, because the valve core 10 has double guide functions, the sealing line deviation when the valve core 10 is closed is reduced, and when oil flows reversely, leakage can be effectively prevented.

When the take-off pressure of the safety valve needs to be adjusted, the connecting nut 60 is rotated, so that the pressure adjusting bolt 50 can be rotated. The pressure regulating bolt 50 is rotated to move the pressure regulating bolt 50 relative to the valve housing 40 to compress or release the resilient member 30 to adjust the take-off pressure of the safety valve.

When the valve is suddenly opened in the adjusting process, the elastic force of the elastic part 30 can make the pressure regulating bolt 50 move backwards, and at the moment, the limiting step 52 of the pressure regulating bolt 50 can be abutted against the locknut 70, so that the pressure regulating bolt 50 is prevented from being separated from the safety valve to cause an accident.

The above examples only represent some embodiments of the present invention, and the description thereof is more 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 concept of the present invention, several modifications and improvements can be made, all according to the equivalent modifications and evolutions of the present invention, which are made to the above embodiments by the essential technology, and all belong to the protection scope of the present invention.

Claims

1. The utility model provides a pressure regulating relief valve, includes case, elastic component and valve barrel, the case accept in the valve barrel, the valve barrel is equipped with oil inlet and oil-out, its characterized in that: the pressure regulating safety valve further comprises a pressure regulating bolt and a connecting nut, the pressure regulating bolt is connected with the connecting nut through threads, two ends of the elastic part are respectively in contact with the valve core and the pressure regulating bolt, the valve core is provided with a bearing surface, the cross section of the bearing surface is oblique lines, the valve sleeve is provided with a contact part, the elastic part enables the bearing surface to be in contact with the contact part to enable the oil inlet to be disconnected with the oil outlet, the pressure regulating bolt is relative, the valve sleeve moves and then compresses or is loosened through compression of the valve sleeve, and the elastic part further adjusts the take-off pressure of the safety valve.

2. The pressure-regulating safety valve of claim 1, wherein: the pressure bearing surface is a circular truncated cone side surface.

3. The pressure-regulating safety valve of claim 1, wherein: the valve core further comprises a head portion and a neck portion, the neck portion is located between the head portion and the pressure bearing face, an oil inlet cavity is formed between the neck portion and the inner wall of the valve sleeve, and the oil inlet cavity is communicated with the oil inlet.

4. The pressure-regulating safety valve of claim 3, wherein: an oil inlet channel is formed between the oil inlet and the oil inlet cavity, and the oil inlet channel is linear and forms an included angle with the horizontal plane.

5. The pressure-regulating safety valve of claim 1, wherein: the valve core further comprises an installation part and a step surface, the step surface is formed between the installation part and the pressure bearing surface, and the elastic piece is sleeved on the installation part and abutted against the step surface.

6. The pressure-regulating safety valve of claim 1, wherein: the elastic piece is a spring.

7. The pressure-regulating safety valve of claim 1, wherein: the pressure regulating bolt is provided with a limiting step, and the limiting step is abutted against the end part of the connecting nut to prevent the pressure regulating bolt from being separated from the connecting nut.

8. The pressure-regulating safety valve of claim 1, wherein: the pressure regulating bolt is provided with a sealing groove, the pressure regulating safety valve comprises a sealing ring, and the sealing ring is arranged in the sealing groove to seal the pressure regulating bolt and the valve sleeve.