CN216009571U

CN216009571U - Soft-sealing high-performance high-pressure needle valve

Info

Publication number: CN216009571U
Application number: CN202122318479.1U
Authority: CN
Inventors: 李海龙; 韩武林; 何赛; 李斌
Original assignee: Hydrosys Beijing Technology Co ltd
Current assignee: Hydrosys Beijing Technology Co ltd
Priority date: 2021-09-24
Filing date: 2021-09-24
Publication date: 2022-03-11
Anticipated expiration: 2031-09-24

Abstract

The utility model discloses a soft sealing high performance high pressure needle valve, including valve rod uide bushing, base, valve rod, upper portion and valve rod uide bushing upper portion threaded connection in the valve rod, valve rod top fixedly connected with handle, the valve rod lower part is equipped with bellied sealing platform, and sealing platform is located valve rod uide bushing air inlet top, is equipped with combination sealing member one between valve rod and the valve rod uide bushing, and the internal thread section lower extreme of a combination sealing member next-door neighbour valve rod uide bushing is equipped with the spring between combination sealing member one and the sealing platform, and the spring housing is established in the valve rod outside. The utility model has the characteristics of but accurate adjustment flow, can frequent switch, adjustable precision height, small, the latus rectum is little, the pressure-bearing is high, can improve service pressure, can increase valve body discharge capacity etc.

Description

Soft-sealing high-performance high-pressure needle valve

Technical Field

The utility model relates to a valve manufacturing technical field particularly, relates to a soft sealing high performance high pressure needle valve.

Background

The high-pressure needle valve is a valve capable of accurately adjusting the flow of fluid, and can be applied to various technical fields, such as aerospace, military industry, hydrogen filling stations, automobile manufacturing, scientific research, chemical engineering, petroleum and natural gas, electric power, metallurgy, building materials, paper pulp and paper making, food and beverage, pharmacy, other industries and the like. The valve plug of traditional high pressure needle valve is the metal cone, and the sealed of valve plug and disk seat between relies on the valve plug conical surface to closely cooperate with the disk seat and reaches. The soft sealing form of the high-pressure needle valve is blank in China, and the traditional high-pressure needle valve adopts metal sealing, so that the defects of less switching times, easiness in leakage and the like can be caused. Specifically, the domestic current high-pressure needle valve has the following defects: the valve rod and the valve seat of the needle valve are easy to wear, and metal chips falling off after being worn can pollute fluid; the valve rod is not suitable for frequent opening and closing, and is easy to leak; the switching moment is increased, and the adjustment is not accurate.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem among the correlation technique, the utility model provides a soft sealing high performance high pressure needle valve can overcome prior art's the aforesaid not enough.

In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows:

a soft sealing high-performance high-pressure needle valve comprises a valve rod guide sleeve, the lower part of the valve rod guide sleeve is embedded into a base, the inner cavity gas path of the valve rod guide sleeve is arranged between the gas inlet end and the gas outlet end of the base, the inner cavity of the valve rod guide sleeve is provided with a valve rod in a penetrating way, the middle upper part of the valve rod is in threaded connection with the upper part of the valve rod guide sleeve, the top of the valve rod is fixedly connected with a handle, the lower part of the valve rod is provided with a raised sealing platform which is positioned above the air inlet of the valve rod guide sleeve, the outer diameter of the sealing platform is larger than the inner diameter of an air inlet of the valve rod guide sleeve, a first combined sealing element is arranged between the valve rod and the valve rod guide sleeve, the first combined sealing element is close to the lower end of the inner threaded section of the valve rod guide sleeve, a spring is arranged between the first combined sealing element and the sealing platform, and the spring is sleeved on the outer side of the valve rod.

Preferably, the lower surfaces of the sealing platforms are perpendicular to the central axis of the valve rod.

Preferably, the upper end of the spring is provided with an upper spring seat, and the lower end of the spring is provided with a lower spring seat.

Preferably, the middle lower part of the valve rod guide sleeve is in threaded connection with the base.

Preferably, the middle upper part of the valve rod guide sleeve is in threaded connection with a guide lock nut.

Preferably, a second combined sealing element is arranged between the valve rod guide sleeve and the base, and the second combined sealing element is closely adjacent to the lower end of the external thread section of the valve rod guide sleeve.

Preferably, the air inlet of the valve rod guide sleeve is provided with a sealing ring, and the lower end of the valve rod movably penetrates through the sealing ring.

Preferably, a sealing ring sheath is arranged between the sealing ring and the side wall of the air inlet of the valve rod guide sleeve.

Preferably, a handle pin is arranged inside the handle, one end of the handle pin is fixedly connected with the top of the valve rod, and the other end of the handle pin is connected with the extension rod through a jackscrew.

Preferably, the right end of the base is an air inlet end, and the left end of the base is an air outlet end.

The utility model has the advantages that:

1. the utility model can fill the blank in the field of high pressure needle valve soft sealing in China;

2. the utility model can greatly reduce the cost of the high-pressure needle valve on the premise of ensuring the use function, and has good economy;

3. the utility model can ensure the high frequency switch times and good use performance of the needle valve under the high pressure environment, and can improve the quality and performance of the device or the system;

4. the utility model discloses in can guarantee longer life, can reduce the maintenance number of times, can improve the efficiency of the system of place.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a soft seal high performance high pressure needle valve according to an embodiment of the present invention;

in the figure: 1. a valve stem guide sleeve; 2. a base; 3. a valve stem; 4. a handle; 5. sealing the platform; 6. a first combined sealing element; 7. a spring; 8. a spring upper seat; 9. a spring lower seat; 10. a guiding lock nut; 11. a second combined sealing element; 12. a seal ring; 13. a sealing ring sheath; 14. a handle pin; 15. and (5) jacking the screw.

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 all belong to the protection scope of the present invention.

As shown in fig. 1, according to the embodiment of the utility model, the soft seal high-performance high-pressure needle valve comprises a valve rod guide sleeve 1, the lower part of the valve rod guide sleeve 1 is embedded into a base 2, an inner cavity gas circuit of the valve rod guide sleeve 1 is arranged between an air inlet end and an air outlet end of the base 2, a valve rod 3 is arranged in the inner cavity of the valve rod guide sleeve 1 in a penetrating way, the upper middle part of the valve rod 3 is in threaded connection with the upper part of the valve rod guide sleeve 1, a handle 4 is fixedly connected with the top of the valve rod 3, a raised sealing platform 5 is arranged on the lower part of the valve rod 3, the sealing platform 5 is positioned above an air inlet of the valve rod guide sleeve 1, the outer diameter of the sealing platform 5 is larger than the inner diameter of the air inlet of the valve rod guide sleeve 1, a combined sealing element 6 is arranged between the valve rod 3 and the valve rod guide sleeve 1, the combined sealing element 6 is close to the lower end of the inner thread section of the valve rod guide sleeve 1, a spring 7 is arranged between the combined sealing element 6 and the sealing platform 5, and the spring 7 is arranged outside the valve rod 3; the lower surfaces of the sealing platforms 5 are all vertical to the central axis of the valve rod 3; the upper end of the spring 7 is provided with an upper spring seat 8, and the lower end of the spring 7 is provided with a lower spring seat 9; the middle lower part of the valve rod guide sleeve 1 is in threaded connection with the base 2; the middle upper part of the valve rod guide sleeve 1 is in threaded connection with a guide lock nut 10; a second combined sealing element 11 is arranged between the valve rod guide sleeve 1 and the base 2, and the second combined sealing element 11 is close to the lower end of the external thread section of the valve rod guide sleeve 1; a sealing ring 12 is arranged at the air inlet of the valve rod guide sleeve 1, and the lower end of the valve rod 3 is movably arranged in the sealing ring 12 in a penetrating way; a sealing ring sheath 13 is arranged between the sealing ring 12 and the side wall of the air inlet of the valve rod guide sleeve 1; a handle pin 14 is arranged in the handle 4, one end of the handle pin 14 is fixedly connected with the top of the valve rod 3, and the other end of the handle pin 14 is connected with an extension rod through a jackscrew 15; the right end of the base 2 is an air inlet end, and the left end of the base 2 is an air outlet end.

For the convenience of understanding the above technical solutions of the present invention, the above technical solutions of the present invention are explained in detail through specific use modes below.

When in specific manufacture and use:

the valve rod 3 is slender, the upper end of the valve rod is fixedly connected to the handle 4, and the valve rod and the handle are prevented from rotating relatively through a handle pin 14; the middle part of the valve rod 3 is connected to the valve rod guide sleeve 1 through threads; the lower end of the valve rod 3 is provided with a convex surface of a sealing platform 5, when the handle 4 rotates, the handle 4 drives the valve rod 3 to move up and down under the guidance of the valve rod guide sleeve 1, and the sealing platform 5 and the sealing ring 12 are closely combined or separated to realize the sealing and opening between the sealing platform and the sealing ring, so that the blocking and the passing of fluid media are realized, and the throughput of the media can be adjusted; because the sealing is plane sealing, the sealing effect is good and the abrasion is small.

The valve rod guide sleeve 1 is connected to the base 2 through threads, and the outside of the valve rod guide sleeve is fastened through a guide lock nut 10.

In order to ensure the normal function of the needle valve in a high-pressure fluid environment, the action on fluid and the fluid tightness, a combined sealing member I6 is arranged between the valve rod 3 and the valve rod guide sleeve 1, and a sealing assembly II 11 is arranged between the valve rod guide sleeve 1 and the base 2.

A spring 7 is arranged between the upper end combined sealing piece I6 of the valve rod 3 and the convex surface of the lower end sealing platform 5, and an upper spring seat 8 and a lower spring seat 9 are arranged at the upper end and the lower end of the spring 7 so as to keep the stability of the spring 7; the spring 7 ensures that it maintains a certain pressure and contact against the composite seal 6, avoiding fluid leakage there.

In order to guarantee that the needle valve still keeps good function and the leakproofness to the fluid under the high pressure high frequency time switch condition, the utility model provides a needle valve has adopted unique soft seal structure, and the concrete expression does:

a sealing ring 12 contacted with the convex surface of the sealing platform 5 at the lower end of the valve rod 3 is a wear-resistant soft sealing ring prepared from a composite material;

in order to keep the good function of the soft sealing ring 12, a sealing ring sheath 13 is embedded in the valve rod guide sleeve 1, and then the sealing ring 12 is embedded in the sealing ring sheath 13, so that the sealing ring 12 is protected and shaped, and the sealing effect of the sealing ring 12 is ensured;

the soft sealing technology ensures that the problems of poor sealing, fluid leakage, switch function failure and the like caused by abrasion, plastic deformation and even metal chip shedding at the sealing part under the conditions of high pressure and frequent switch use are solved;

except adopting soft sealed effect of guaranteeing to seal, in the threaded connection design in the top, screw thread pitch designs littleer, and the diameter of valve rod 3 itself is little in addition, makes the utility model provides a needle valve is when the switch, and switch moment is little, adjust more accurately.

Through the test of the applicant, the needle valve of the utility model can realize 8 ten thousand switches under the gas medium, and the highest service pressure under the gas medium can reach 55 MPa.

To sum up, the utility model discloses a high-pressure needle valve of soft sealing technology preparation has: the flow can be finely adjusted, the valve can be frequently opened and closed, the adjustable precision is high, the size is small, the drift diameter is small, the pressure bearing is high, the service pressure can be improved, the discharge capacity of the valve body can be increased, and the like.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a soft sealing high performance high pressure needle valve, includes valve rod uide bushing (1), its characterized in that, valve rod uide bushing (1) lower part embedding base (2) in, valve rod uide bushing (1) inner chamber gas circuit in the inlet end of base (2) with give vent to anger between the end, valve rod (3) are worn to be equipped with by valve rod uide bushing (1) inner chamber, upper portion in valve rod (3) with valve rod uide bushing (1) upper portion threaded connection, valve rod (3) top fixedly connected with handle (4), valve rod (3) lower part is equipped with bellied sealed platform (5), sealed platform (5) are located above valve rod uide bushing (1) air inlet, sealed platform (5) external diameter is greater than valve rod uide bushing (1) air inlet internal diameter, valve rod (3) with be equipped with combined seal spare (6) between valve rod uide bushing (1), the first combined sealing element (6) is close to the lower end of the internal thread section of the valve rod guide sleeve (1), a spring (7) is arranged between the first combined sealing element (6) and the sealing platform (5), and the spring (7) is sleeved on the outer side of the valve rod (3).

2. The soft seal high performance high pressure needle valve according to claim 1, characterized in that the lower surface of the seal platform (5) is perpendicular to the central axis of the valve stem (3).

3. The soft sealing high-performance high-pressure needle valve as claimed in claim 1, wherein an upper spring seat (8) is arranged at the upper end of the spring (7), and a lower spring seat (9) is arranged at the lower end of the spring (7).

4. The soft seal high performance high pressure needle valve according to claim 1, characterized in that the lower middle part of the valve rod guide sleeve (1) is in threaded connection with the base (2).

5. The soft-sealing high-performance high-pressure needle valve as claimed in claim 4, wherein the middle upper part of the valve rod guide sleeve (1) is in threaded connection with the guide lock nut (10).

6. The soft-sealing high-performance high-pressure needle valve as claimed in claim 4, characterized in that a second combined sealing element (11) is arranged between the valve rod guide sleeve (1) and the base (2), and the second combined sealing element (11) is closely adjacent to the lower end of the external thread section of the valve rod guide sleeve (1).

7. The soft sealing high-performance high-pressure needle valve as claimed in claim 1, wherein a sealing ring (12) is arranged at an air inlet of the valve rod guide sleeve (1), and the lower end of the valve rod (3) is movably arranged in the sealing ring (12) in a penetrating manner.

8. The soft-sealing high-performance high-pressure needle valve as claimed in claim 7, wherein a sealing ring sheath (13) is arranged between the sealing ring (12) and the side wall of the air inlet of the valve rod guide sleeve (1).

9. The soft-sealing high-performance high-pressure needle valve as claimed in any one of claims 1 to 8, wherein a handle pin (14) is arranged inside the handle (4), one end of the handle pin (14) is fixedly connected with the top of the valve rod (3), and the other end of the handle pin (14) is connected with an extension rod through a jackscrew (15).

10. The soft-sealing high-performance high-pressure needle valve as claimed in claim 9, wherein the right end of the base (2) is an air inlet end, and the left end of the base (2) is an air outlet end.