CN215635197U

CN215635197U - Cutting ferrule formula relief valve

Info

Publication number: CN215635197U
Application number: CN202122367315.8U
Authority: CN
Inventors: 何剑
Original assignee: Universal Valve Co ltd
Current assignee: Universal Valve Co ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2022-01-25
Anticipated expiration: 2031-09-27

Abstract

The utility model discloses a ferrule type safety valve, which is characterized in that a valve seat comprises an upper valve seat, an elastic sealing ring and a lower valve seat which are coaxially arranged in sequence along the axis of a valve rod, the diameter of an inner hole of the upper valve seat, through which a sealing rod passes, is the same as that of the sealing rod, the inner diameter of the elastic sealing ring is matched with that of the sealing rod, the diameter of the inner hole of the lower valve seat is smaller than that of the sealing rod, the upper valve seat is in threaded connection with a valve body, the elastic sealing ring and the lower valve seat are limited on the valve body, a medium cannot flow through the valve body through the attachment of the elastic sealing ring and the peripheral wall of the sealing rod and the attachment of the end face of the lower valve seat and the end face of the sealing rod, and the problem that the sealing performance between the valve rod and the valve seat is reduced due to the corrosion of the medium between the end face of the valve rod and the end face of the valve seat in the prior art is solved.

Description

Cutting ferrule formula relief valve

Technical Field

The utility model relates to the field of safety valves, in particular to a ferrule type safety 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.

Safety valve structures mainly fall into two categories: lever type and spring type. The spring indicates that the valve clack or valve rod and the sealed effort that leans on the spring of disk seat, this kind of sealed mode is closely laminated two terminal surfaces and forms hard seal, but there is the defect, two terminal surfaces of laminating mutually can make two terminal surfaces appear damaging through medium corrosion or erode, thereby cause the gap to appear between two terminal surfaces, the leakproofness descends when the close condition of relief valve, the condition of leaking appears, pipeline transport medium's pressure produces undulantly, when pipeline internal pressure appears unusually, the valve plate or valve rod are by the required pressure requirement that the medium pushed up from the disk seat and are uprised, the relief valve can't open in time, pipeline security is low.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a ferrule type safety valve with good sealing performance and high safety.

In order to achieve the purpose, the utility model provides the following technical scheme: a ferrule type safety valve comprises a valve body, a valve seat positioned in the valve body, a valve cover positioned on the valve body, an adjusting screw inserted on the valve cover, an ejector rod positioned in the valve cover and abutted against the adjusting screw, a valve rod coaxial with the ejector rod and with one end inserted in the ejector rod, a spring seat integrated with the valve rod, and a spring limited between the ejector rod and the spring seat and sleeved outside the valve rod, wherein the valve rod comprises a sealing rod penetrating through the spring seat and facing the valve seat, the valve seat comprises an upper valve seat, an elastic sealing ring and a lower valve seat which are sequentially and coaxially arranged along the axis of the valve rod, the diameter of an inner hole through which the sealing rod penetrates by the upper valve seat is the same as that of the sealing rod, the inner diameter of the elastic sealing ring is matched with that of the sealing rod, the diameter of the inner hole of the lower valve seat is smaller than that of the sealing rod, the upper valve seat is in threaded connection with the valve body and limits the elastic sealing ring and the lower valve seat on the valve body, the medium cannot flow through the valve body through the attachment of the elastic sealing ring and the peripheral wall of the sealing rod and the attachment of the end face of the lower valve seat and the end face of the sealing rod.

As a further improvement of the utility model, the valve body comprises an upper valve body and a lower valve body which are communicated with each other and fixedly connected together, the valve cover is connected with the upper valve body, the spring seat and the valve rod are all positioned in the upper valve body, and the upper valve seat, the elastic sealing ring and the lower valve seat are all positioned in the lower valve body.

As a further improvement of the utility model, a sealing member is arranged between the upper valve body and the lower valve body.

As a further improvement of the utility model, a straight groove which is coaxially arranged with an inner hole and communicated with the inner hole is formed in the upper valve seat from the end surface of the upper valve seat facing the spring seat to the inside of the upper valve seat.

As a further improvement of the utility model, the outer wall of the lower valve seat is provided with a limit groove for locally accommodating the elastic sealing ring.

As a further improvement of the utility model, an O-shaped sealing ring is arranged between the ejector rod and the valve cover.

As a further development of the utility model, the end edges of the sealing bars are rounded.

As a further improvement of the utility model, the ejector rod is provided with a positioning groove for the end part of the adjusting screw to extend into.

The utility model has the beneficial effects that: the valve seat is divided into an upper valve seat, an elastic sealing ring and a lower valve seat which are sequentially arranged in the valve body, the upper valve seat is in threaded connection with the valve body, the elastic sealing ring and the lower valve seat are limited between the upper valve seat and the valve body, the end part of the sealing rod sequentially penetrates through the upper valve seat and the elastic sealing ring and is attached to the end surface of the lower valve seat to form hard seal, the outer wall of the sealing rod is attached to the elastic sealing ring to form soft seal, compared with the design that the hard seal is formed by only attaching the end surface of the sealing rod to the end surface of the valve seat in the prior art, the soft seal is formed by attaching the elastic sealing ring to the outer wall of the sealing rod, and the valve seat structure with double soft and hard seals ensures the stability of the sealing performance and indirectly improves the safety of the valve seat in use.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

fig. 3 is a top view of the upper valve seat of the present invention.

Reference numerals: 1. a valve body; 2. a valve seat; 3. a valve cover; 4. an adjusting screw; 5. a top rod; 6. a valve stem; 7. a spring seat; 8. a spring; 9. a sealing rod; 10. an upper valve seat; 11. an elastic sealing ring; 12. a lower valve seat; 13. an upper valve body; 14. a lower valve body; 15. a seal member; 16. a straight slot; 17. a limiting groove; 18. an O-shaped sealing ring; 19. and (6) positioning a groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals.

Referring to fig. 1 to 3, the ferrule type safety valve of the present embodiment includes a valve body 1, a valve seat 2 located in the valve body 1, a valve cover 3 located on the valve body 1, an adjusting screw 4 inserted into the valve cover 3, a push rod 5 located in the valve cover 3 and contacting against the adjusting screw 4, a valve rod 6 coaxial with the push rod 5 and having one end inserted into the push rod 5, a spring seat 7 integrally formed with the valve rod 6, and a spring 8 limited between the push rod 5 and the spring seat 7 and sleeved outside the valve rod 6, where the valve rod 6 includes a sealing rod 9 penetrating through the spring seat 7 and facing the valve seat 2;

based on the prior art, the valve seat 2 comprises an upper valve seat 10, an elastic sealing ring 11 and a lower valve seat 12 which are coaxially arranged in sequence along the axis of the valve rod 6, the diameter of an inner hole of the upper valve seat 10 is the same as that of the sealing rod 9, a straight groove 16 which is coaxially arranged with the inner hole of the sealing rod is formed in the end face of the upper valve seat 10 facing the spring seat 7, the straight groove is communicated with the inner hole of the sealing rod, the upper valve seat 10 is provided with external threads, the height of the straight groove 16 is smaller than that of the inner hole of the upper valve seat 10, the inner diameter of the elastic sealing ring 11 is matched with that of the sealing rod 9, the diameter of the inner hole of the lower valve seat 12 is smaller than that of the sealing rod 9, the valve body 1 comprises an upper valve body 13 and a lower valve body 14 which are communicated with each other and fixedly connected together, the upper valve body 13 and the lower valve body 14 can be connected together in a threaded manner, and the lower valve body 14 is provided with internal threads matched with the external threads of the upper valve seat 10;

in the assembling process, a lower valve seat 12 and an elastic sealing ring 11 are sequentially arranged in a lower valve body 14, then a linear screwdriver is inserted into a linear groove 16 to screw an upper valve seat 10 into the lower valve body 14 and press the elastic sealing ring 11 tightly, the lower valve seat 12 and the elastic sealing ring 11 are both limited between the lower valve body 14 and the upper valve seat 10, a flow passage of the lower valve body 14, an inner hole of the lower valve seat 12, an inner hole of the elastic sealing ring 11 and an inner hole of the upper valve seat 10 are sequentially communicated, the outer diameter of the lower valve seat 12 and the outer diameter of the elastic sealing ring 11 are both matched with the inner diameter of a cavity in which the lower valve seat 12 and the elastic sealing ring 11 are arranged, the upper valve seat 10 generates extrusion force on the elastic sealing ring 11 to force the elastic sealing ring 11 to deform, the inner wall of the elastic sealing ring 11 moves towards the center, then the lower valve body 14 and the upper valve body 13 are connected together in a threaded manner, a valve rod 6 is arranged in the upper valve body 13 to enable the end part of a sealing rod 9 to sequentially penetrate through the upper valve seat 10 and the elastic sealing ring 11 and be attached to the end surface of the lower valve seat 12, the outer wall of the sealing rod 9 is attached to the inner wall of the elastic sealing ring 11, the spring 8 is continuously sleeved on the valve rod 6, one end of the spring 8 is abutted against the spring seat 7, the sealing rod 9 and the spring 8 are respectively positioned on two sides of the spring seat 7, then the ejector rod 5 provided with the rod groove is sleeved outside one end of the valve rod 6, the ejector rod 5 is abutted against the other end of the spring 8, and finally the valve cover 3 screwed with the adjusting screw 4 is sleeved outside the ejector rod 5 and is in threaded connection with the upper valve body 13;

compared with the prior art that the end face of the sealing rod 9 is only attached to the end face of the valve seat 2 to form hard sealing, the design that the elastic sealing ring 11 is attached to the outer wall of the sealing rod 9 to form soft sealing is additionally arranged, the structure of the valve seat 2 with soft and hard double sealing ensures the stability of sealing performance, and the safety of the utility model in use is indirectly improved; compared with the split design of the prior art, which splits the valve body 1 into the upper valve body 13 and the lower valve body 14, the split design of the prior art can not only reduce the processing difficulty, but also facilitate the splitting, the maintenance and the replacement of damaged parts;

further preferably, referring to fig. 1, a sealing member 15 is arranged between the upper valve body 13 and the lower valve body 14, the sealing member 15 can be a sealing ring and is sleeved outside the lower valve body 14, and by adopting the design, after the upper valve body 13 and the lower valve body 14 are connected to each other in place, the upper valve body 13 and the lower valve body 14 are sealed with the sealing member 15, so that the sealing performance between the upper valve body 13 and the lower valve body 14 is improved.

As an improved specific embodiment, referring to fig. 2, a part of the outer wall of the lower valve seat 12 is turned on and forms an annular limiting groove 17 coaxially arranged with the outer wall, the height of the limiting groove 17 is less than the thickness of the elastic sealing ring 11, the elastic sealing ring 11 is sleeved outside the inner wall of the limiting groove 17 and is attached to the bottom of the limiting groove 17, the outer wall of the elastic sealing ring 11 is attached to the inner wall of the lower valve body 14, the elastic sealing ring 11 is extruded by the upper valve seat 10 and is deformed, the gap between the upper valve seat 10 and the lower valve seat 12 of the elastic sealing ring 11 protrudes towards the center of the circle of the elastic sealing ring 11 so as to be subsequently attached to the outer wall of the sealing rod 9, compared with the design that the elastic sealing ring 11 is directly attached to the end face of the lower valve seat 12, the design can provide a limit for the elastic sealing ring 11, and avoid the situation that the elastic sealing ring 11 moves relative to the lower valve seat 12 to cause eccentricity, the outer wall of the sealing rod 9 is fully attached to the elastic sealing ring 11, and the sealing performance is indirectly improved.

As an improved specific embodiment, referring to fig. 1, a sealing groove is formed on the outer wall of the ejector rod 5, an elastic O-ring 18 is installed in the sealing groove, and when the ejector rod 5 is located in the valve cover 3, the O-ring 18 is attached to the inner wall of the valve cover 3 to form a soft seal, so that the design can effectively prevent the leakage of the medium between the adjusting screw 4 and the valve cover 3.

As an improved specific embodiment, referring to fig. 2, the end edge of the sealing rod 9 is rounded, so that compared with the design that the end edge of the sealing rod 9 is angular, the design can reduce the abrasion of the elastic sealing ring 11 when the sealing rod 9 penetrates into the elastic sealing ring 11 and facilitate the rapid insertion of the sealing rod 9 into the elastic sealing ring 11.

As an improved specific embodiment, as shown in fig. 1, if the end of the adjusting screw 4 abuts against the end face of the ejector rod 5, when a medium enters the valve body 1 and exerts a radial force on the valve rod 6, the valve rod 6 drives the ejector rod 5 to shift relative to the axis of the valve cover 3, which not only affects whether the subsequent sealing rod 9 can be inserted back into the valve seat 2, but also affects the sealing performance between the valve cover 3 and the O-shaped sealing ring 18, in order to solve the problem, the ejector rod 5 is provided with a positioning groove 19 for the end of the adjusting screw 4 to extend into, so that the ejector rod 5 is always arranged coaxially with the adjusting screw 4, the outer wall of the O-shaped sealing ring 18 is fully attached to the inner wall of the valve cover 3, and simultaneously, the valve rod 6 is always arranged coaxially with the valve seat 2, and the subsequent sealing rod 9 is beneficial to be inserted into the valve seat 2 again.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims

1. The utility model provides a cutting ferrule formula relief valve, includes valve body (1), be located disk seat (2) in valve body (1), be located valve gap (3) on valve body (1), alternate adjusting screw (4) on valve gap (3), be located valve gap (3) and push up ejector pin (5) that touches with adjusting screw (4), with coaxial and one end of ejector pin (5) alternate in valve rod (6) in ejector pin (5), with valve rod (6) integrated into one piece's spring holder (7) and spacing between ejector pin (5) and spring holder (7) and overlap spring (8) outside locating valve rod (6), valve rod (6) including passing spring holder (7) and towards seal rod (9) of disk seat (2), its characterized in that: disk seat (2) include along valve rod (6) place axis coaxial setting's last disk seat (10), elastic seal circle (11) and lower disk seat (12) in proper order, it is the same with the diameter of sealing rod (9) to go up the hole diameter that disk seat (10) supplied sealing rod (9) to pass, the internal diameter of elastic seal circle (11) and the diameter looks adaptation of sealing rod (9), the hole diameter of lower disk seat (12) is less than the diameter of sealing rod (9), go up disk seat (10) and valve body (1) threaded connection and with elastic seal circle (11) and lower disk seat (12) spacing on valve body (1), through the perisporium laminating of elastic seal circle (11) and sealing rod (9) and through the terminal surface laminating of lower disk seat (12) and sealing rod (9) all make the medium can't flow through valve body (1).

2. The ferrule type safety valve of claim 1, wherein: the valve body (1) is including last valve body (13) and lower valve body (14) that communicate each other and fixed connection together, valve gap (3) are connected with last valve body (13), spring (8), spring holder (7) and valve rod (6) all are located last valve body (13), go up disk seat (10), elastic seal (11) and disk seat (12) all are located lower valve body (14).

3. The ferrule type safety valve according to claim 2, wherein: and a sealing element (15) is arranged between the upper valve body (13) and the lower valve body (14).

4. A ferrule type safety valve according to claim 1, 2 or 3, wherein: the upper valve seat (10) is provided with a straight groove (16) which is coaxially arranged with the inner hole of the upper valve seat and is communicated with the inner hole of the upper valve seat from the end surface of the upper valve seat facing the spring seat (7) to the inside of the upper valve seat.

5. A ferrule type safety valve according to claim 1, 2 or 3, wherein: and the outer wall of the lower valve seat (12) is provided with a limit groove (17) for locally accommodating the elastic sealing ring (11).

6. A ferrule type safety valve according to claim 1, 2 or 3, wherein: an O-shaped sealing ring (18) is arranged between the ejector rod (5) and the valve cover (3).

7. A ferrule type safety valve according to claim 1, 2 or 3, wherein: the end edge of the sealing rod (9) is rounded.

8. A ferrule type safety valve according to claim 1, 2 or 3, wherein: the ejector rod (5) is provided with a positioning groove (19) for the end part of the adjusting screw (4) to extend into.