CN113280123A

CN113280123A - Composite sealing valve

Info

Publication number: CN113280123A
Application number: CN202110645501.5A
Authority: CN
Inventors: 邬冬梅; 张轶
Original assignee: Jiangxi Gangbei Fluid Automatic Control Technology Co ltd
Current assignee: Jiangxi Gangbei Fluid Automatic Control Technology Co ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2021-08-20
Anticipated expiration: 2041-06-10
Also published as: CN113280123B

Abstract

A compound sealing valve, comprising: the valve comprises a valve body, a valve body and a valve body, wherein a first fluid channel and a second fluid channel are arranged on the left side and the right side of the valve body; the valve seat is positioned in the partition hole; the first valve core comprises a sealing part and a connecting part, the sealing part can be inserted into the matching hole, and the connecting part is movably connected with the valve rod; the connecting part penetrates out of the top of the second valve core, and a first compression spring is arranged between the stepped surface and the second valve core; the support, support and valve body fixed connection, valve rod and support threaded connection. The composite sealing valve has double sealing functions, and has better sealing performance than a valve with only one seal, tighter sealing and longer service life.

Description

Composite sealing valve

Technical Field

The invention belongs to the technical field of valves, and particularly relates to a composite sealing valve.

Background

Valves are accessories for pipes used to open and close the pipes, control flow direction, regulate and control parameters of the transport medium (temperature, pressure and flow). It can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, slurries, oils, liquid metals, and radioactive media. The sealing performance of the valve is the capability of each sealing part of the valve to prevent medium leakage, and is the most important technical performance index of the valve. In the prior art, the valve is only provided with one seal, and is easily washed and corroded under the adjustment of severe working conditions, so that the valve has an internal leakage phenomenon, and the sealing performance of the valve is seriously influenced.

Disclosure of Invention

The invention aims to provide a composite sealing valve, which solves the problems in the background technology.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a compound sealing valve, comprising:

the valve comprises a valve body, a first fluid channel and a second fluid channel are arranged on the left side and the right side of the valve body, partition holes communicated with the first fluid channel and the second fluid channel are further formed in the valve body, and an intersection of the first fluid channel and the partition holes is positioned above an intersection of the second fluid channel and the partition holes;

the valve seat is positioned in the partition hole and positioned between the two intersections, the upper end of the valve seat is provided with a matching part, the matching part is provided with a matching hole, and a gap is reserved between the outer surface of the matching part and the partition hole;

the first valve core comprises a sealing part and a connecting part, the sealing part can be inserted into the matching hole, and after the sealing part is inserted into the matching hole, the whole or part of the outer surface of the sealing part is contacted with the side surface of the matching hole, a horizontal step surface is arranged on the outer side of the transition part of the sealing part and the connecting part, and the connecting part is movably connected with the valve rod;

the valve comprises a valve body, a first valve core, a second valve core and a connecting part, wherein a stepped hole is formed in the second valve core, the first valve core is arranged in the stepped hole, the whole or part of the side surface of the stepped hole is in contact with the outer surface of the matching part, the connecting part penetrates out of the top of the second valve core, the top of the second valve core is positioned between the valve rod and the stepped surface, the top surface of the second valve core is abutted against the bottom surface of the valve body, and a first compression spring is arranged between the stepped surface and the second valve core;

the support, support and valve body fixed connection, the valve rod stretches into in the support, and wears out from the top of support, valve rod and support threaded connection.

On the basis of the above scheme and as a preferable scheme of the above scheme, the inner surface and the outer surface of the top of the matching portion are both provided with conical surfaces, and the outer surface of the sealing portion and the side surface of the stepped hole are respectively provided with conical surfaces matched with the sealing portion.

On the basis of the above scheme and as a preferred scheme of the above scheme, the connecting portion is provided with a threaded hole, a screw rod is in threaded connection with the threaded hole, the bottom of the valve rod is provided with an insertion hole, the valve rod is provided with a waist-shaped hole, the waist-shaped hole penetrates through the insertion hole, the connecting portion is located in the insertion hole, two ends of the screw rod are located in the waist-shaped hole, the screw rod can move up and down in the waist-shaped hole after being connected with the first valve core, and the maximum compression amount of the first compression spring is larger than the maximum moving distance of the screw rod in the waist-shaped hole.

On the basis of the scheme, the preferable scheme of the scheme is that the valve rod comprises an upper valve rod and a lower valve rod, and the upper valve rod and the lower valve rod are connected through a compensator; go up the upper portion and the support threaded connection of valve rod, the lower part and the compensator fixed connection of going up the valve rod, valve rod and compensator swing joint down, it is equipped with second compression spring to go up between valve rod and the lower valve rod, second compression spring is located inside the compensator, the card is prevented changeing by the side fixedly connected with of compensator, prevent changeing card and support swing joint, just prevent changeing the card and only can reciprocate along the support.

On the basis of the scheme, as a preferable scheme of the scheme, the upper valve rod comprises a trapezoidal screw rod and a trapezoidal nut, the trapezoidal screw rod is in threaded connection with the trapezoidal nut, the trapezoidal nut extends out of the top end of the support, and the trapezoidal nut is rotatably connected with the support.

On the basis of the scheme, as a preferable scheme of the scheme, the lower end of the support is connected with a valve cover, filler is arranged in the valve cover, the valve rod penetrates through the filler, and the valve body, the valve seat and the valve cover are fixedly connected together through bolts.

On the basis of the above scheme and as a preferred scheme of the above scheme, a pressing sleeve is arranged in the partition hole, the bottom of the pressing sleeve is in mutual contact with the valve seat, and the top of the pressing sleeve is in mutual contact with the end face of the valve cover.

On the basis of the above scheme and as a preferable scheme of the above scheme, a positioning sleeve is arranged between the bracket and the valve cover, and the bolt penetrates through the positioning sleeve.

On the basis of the scheme and as a preferable scheme of the scheme, sealing gaskets are arranged between the valve cover and the valve body and between the valve seat and the valve body; the bottom of the filler is provided with a metal gasket, and the metal gasket is arranged between the filler and the valve cover.

On the basis of the scheme, and as a preferable scheme of the scheme, the top of the valve rod is connected with a hand wheel.

The invention has the following beneficial effects: the composite sealing valve has double sealing functions, and has better sealing performance than a valve with only one seal, tighter sealing and longer service life; a first compression spring is arranged between the first valve core and the second valve core, so that the valve has an automatic compensation sealing function; a second compression spring is arranged between the upper valve rod and the lower valve rod, when the valve is sealed, the upper valve rod and the lower valve rod can be always in a compression state, the lower valve rod can be ensured to always compress the two valve cores, and the sealing performance of the whole valve is better; the trapezoidal screw rod can be driven to rotate by rotating the trapezoidal nut, so that the threaded connection between the upper valve rod and the support is changed into the rotary connection, and the support is prevented from being abraded; the upper valve rod and the lower valve rod enable three-point contact between the valve rod and the trapezoidal nut, the filler and the valve seat to be converted into two-point contact between the lower valve rod and the filler and the valve seat, and distortion and deformation of the valve rod caused by uneven stress are avoided; the whole valve can be fixedly connected only by using the bolts, the valve is convenient to assemble, and the situation that fasteners are used for connection at multiple positions is avoided.

Drawings

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

Fig. 1 is a cross-sectional view of the present invention.

Fig. 2 is a cross-sectional view of the valve seat.

Fig. 3 is a cross-sectional view of the first valve spool.

Fig. 4 is a cross-sectional view of the second valve spool.

Fig. 5 is a cross-sectional view of a portion of the structure of the present invention.

Fig. 6 is a cross-sectional view of the valve stem.

The reference numbers are as follows:

1. a valve body; 101. a first fluid channel; 102. a second fluid passage; 103. a partition hole;

2. a valve seat; 201. a fitting portion; 202. a mating hole;

3. a first valve spool; 301. a sealing part; 302. a connecting portion; 303. a step surface; 304. a threaded hole;

4. a second valve core; 401. a stepped hole;

5. a valve stem; 501. a jack; 502. a kidney-shaped hole; 503. an upper valve stem; 5031. a trapezoidal screw rod; 5032. a trapezoidal nut; 504. a lower valve stem;

6. a first compression spring; 7. a support;

8. a conical surface; 9. a screw; 10. a compensator; 11. a second compression spring; 12. an anti-rotation clamp; 13. a valve cover; 14. a filler; 15. a bolt; 16. a compression sleeve; 17. a positioning sleeve; 18. a gasket; 19. a hand wheel; 20. a metal washer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 to 6, a compound sealing valve includes:

the valve comprises a valve body 1, wherein a first fluid channel 101 and a second fluid channel 102 are arranged on the left side and the right side of the valve body 1, a partition hole 103 communicated with the first fluid channel 101 and the second fluid channel 102 is further arranged in the valve body 1, and the intersection of the first fluid channel 101 and the partition hole 103 is positioned above the intersection of the second fluid channel 102 and the partition hole 103;

the valve seat 2 is positioned in the partition hole 103, the valve seat 2 is positioned between two intersections, a matching part 201 is arranged at the upper end of the valve seat 2, a matching hole 202 is arranged in the matching part 201, and a gap is reserved between the outer surface of the matching part 201 and the partition hole 103;

the first valve core 3, the first valve core 3 includes a sealing part 301 and a connecting part 302, the sealing part 301 can be inserted into the matching hole 202, and after the sealing part 301 is inserted into the matching hole 202, the whole or part of the outer surface of the sealing part 301 is contacted with the side surface of the matching hole 202, the outer side of the transition part of the sealing part 301 and the connecting part 302 is provided with a horizontal stepped surface 303, and the connecting part 302 is movably connected with the valve rod 5;

a second valve core 4, wherein a stepped hole 401 is formed in the second valve core 4, the first valve core 3 is arranged in the stepped hole 401, the whole or part of the side surface of the stepped hole 401 is in contact with the outer surface of the matching part 201, the connecting part 302 penetrates out from the top of the second valve core 4, the top of the second valve core 4 is positioned between the valve rod 5 and the stepped surface 303, the top surface of the second valve core 4 is in interference with the bottom surface of the valve body 1, and a first compression spring 6 is arranged between the stepped surface 303 and the second valve core 4;

the valve rod 5 extends into the support 7 and penetrates out of the top of the support 7, and the valve rod 5 is in threaded connection with the support 7.

When the double-sealing valve is used, the valve rod is rotated, is in threaded connection with the support, moves downwards and downwards presses the first valve core and the second valve core, so that the first valve core and the second valve core are respectively contacted with the inner surface and the outer surface of the valve seat, and double sealing is achieved; and a first compression spring is arranged between the first valve core and the second valve core, so that when the first valve core is worn or corroded, the first valve core can be automatically pressed downwards to force the first valve core to be always contacted with the valve seat, and the sealing effect is ensured. The composite sealing valve has double sealing functions, and has better sealing performance than a valve with only one seal, tighter sealing and longer service life; a first compression spring is arranged between the first valve core and the second valve core, so that the valve has an automatic compensation sealing function.

The inner and outer surfaces of the top of the matching part 201 are provided with tapered surfaces 8, and the outer surface of the sealing part 301 and the side surface of the stepped hole 401 are provided with tapered surfaces 8 matched with the tapered surfaces respectively. The first valve core and the second valve core are in mutual contact through the conical surfaces of the conical surfaces and the valve seat, so that the mutual contact area of the first valve core and the second valve core is increased, and the sealing effect is better.

The connecting portion 302 is provided with a threaded hole 304, a screw 9 is in threaded connection with the threaded hole 304, the bottom of the valve rod 5 is provided with an insertion hole 501, the valve rod 5 is provided with a kidney-shaped hole 502, the kidney-shaped hole 502 penetrates through the insertion hole 501, the connecting portion 302 is located in the insertion hole 501, two ends of the screw 9 are located in the kidney-shaped hole 502, the screw 9 can move up and down in the kidney-shaped hole 502 after the screw 9 is connected with the first valve element 3, and the maximum compression amount of the first compression spring 6 is larger than the maximum moving distance of the screw 9 in the kidney-shaped hole 502. When the valve rod is rotated, the valve rod moves downwards to firstly extrude the first valve core, so that the first valve core is firstly contacted with the valve seat; and when the first compression spring is compressed to the limit, the second valve core is forced to move downwards, so that the second valve core is contacted with the valve seat. Therefore, the first valve core and the second valve core are sequentially contacted with the valve seat to form two sealing structures.

The valve rod 5 comprises an upper valve rod 503 and a lower valve rod 504, and the upper valve rod 503 and the lower valve rod 504 are connected through a compensator 10; go up valve rod 503's upper portion and support 7 threaded connection, go up valve rod 503's lower part and compensator 10 fixed connection, lower valve rod 504 and compensator 10 swing joint, it is equipped with second compression spring 11 to go up between valve rod 503 and the lower valve rod 504, second compression spring 11 is located inside compensator 10, compensator 10's side fixedly connected with prevents changeing card 12, prevent changeing card 12 and support 7 swing joint, just prevent changeing card 12 and only can reciprocate along support 7.

One side of the lower valve rod, which is close to the upper valve rod, is provided with an annular clamping groove, a clamping ring is arranged in the clamping groove, the outer diameter of the clamping ring is larger than the diameter of the lower valve rod, a stepped hole is formed in the compensator, and the clamping ring is located in the stepped hole. So that the lower valve rod can be rotationally clamped in the compensator.

Go up and be equipped with second compression spring between valve rod and the lower valve rod, when sealed, can make all be in the state of compressing tightly between valve rod and the lower valve rod all the time, ensure that the lower valve rod can compress tightly two spools all the time, make the sealing performance of whole valve better.

The upper valve rod 503 comprises a trapezoidal screw rod 5031 and a trapezoidal nut 5032, the trapezoidal screw rod 5031 is in threaded connection with the trapezoidal nut 5032, the trapezoidal nut 5032 extends out from the top end of the bracket 7, and the trapezoidal nut 5032 is rotatably connected with the bracket 7. Through rotating the trapezoidal nut alright drive trapezoidal lead screw and rotate, make the threaded connection between upper valve rod and the support change into and rotate and be connected, avoided wearing and tearing support.

The lower end of the support 7 is connected with a valve cover 13, a packing 14 is arranged in the valve cover 13, the valve rod 5 penetrates through the middle of the packing 14, and the valve body 1, the valve seat 2 and the valve cover 13 are fixedly connected together through a bolt 15. The valve rod and the packing are contacted with each other, so that the friction force between the valve rod and the packing is increased, the stability of the valve rod is increased, and the valve rod is ensured not to lose efficacy easily. The upper valve rod and the lower valve rod enable three-point contact between the valve rod and the trapezoidal nut, the filler and the valve seat to be changed into two-point contact between the lower valve rod and the filler and the valve seat, and distortion and deformation of the valve rod caused by uneven stress are avoided.

A pressing sleeve 16 is arranged in the partition hole 103, the bottom of the pressing sleeve 16 is contacted with the valve seat 2, and the top of the pressing sleeve 16 is contacted with the end face of the valve cover 13. A positioning sleeve 17 is arranged between the bracket 7 and the valve cover 13, and the bolt 15 penetrates through the positioning sleeve 17. The compressing sleeve and the locating sleeve enable the valve to be fixedly connected with the whole valve only by using bolts, the valve is convenient to assemble, and the situation that fasteners are used for connection at multiple positions is avoided.

Sealing gaskets 18 are arranged between the valve cover 13 and the valve body 1 and between the valve seat 2 and the valve body 1, and can increase the sealing performance of the valve, so that liquid is not easy to leak. The bottom of the packing 14 is provided with a metal gasket 20, and the metal gasket 20 is arranged between the packing 14 and the valve cover 13.

The top of the valve rod 5 is connected with a hand wheel 19 which is convenient to rotate so as to open or close the valve.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A compound sealing valve, comprising:

the valve comprises a valve body (1), wherein a first fluid channel (101) and a second fluid channel (102) are arranged on the left side and the right side of the valve body (1), a partition hole (103) communicated with the first fluid channel (101) and the second fluid channel (102) is further formed in the valve body (1), and the intersection of the first fluid channel (101) and the partition hole (103) is positioned above the intersection of the second fluid channel (102) and the partition hole (103);

the valve seat (2) is positioned in the partition hole (103), the valve seat (2) is positioned between two intersections, a matching part (201) is arranged at the upper end of the valve seat (2), a matching hole (202) is arranged in the matching part (201), and a gap is reserved between the outer surface of the matching part (201) and the partition hole (103);

the first valve core (3), the first valve core (3) comprises a sealing part (301) and a connecting part (302), the sealing part (301) can be inserted into the matching hole (202), after the sealing part (301) is inserted into the matching hole (202), the whole or part of the outer surface of the sealing part (301) is in contact with the side surface of the matching hole (202), the outer side of the transition part of the sealing part (301) and the connecting part (302) is provided with a horizontal stepped surface (303), and the connecting part (302) is movably connected with the valve rod (5);

the valve body (1) is provided with a first valve core (4), a stepped hole (401) is formed in the second valve core (4), the first valve core (3) is arranged in the stepped hole (401), the whole or part of the side surface of the stepped hole (401) is in contact with the outer surface of the matching part (201), the connecting part (302) penetrates out of the top of the second valve core (4), the top of the second valve core (4) is located between the valve rod (5) and the stepped surface (303), the top surface of the second valve core (4) is in mutual interference with the bottom surface of the valve body (1), and a first compression spring (6) is arranged between the stepped surface (303) and the second valve core (4);

support (7), support (7) and valve body (1) fixed connection, valve rod (5) stretch into in support (7), and wear out from the top of support (7), valve rod (5) and support (7) threaded connection.

2. A compound sealing valve as defined in claim 1, wherein: the interior external surface at cooperation portion (201) top all is equipped with conical surface (8), the surface of sealing (301) and the side of shoulder hole (401) are equipped with rather than complex conical surface (8) respectively.

3. A compound sealing valve as defined in claim 1, wherein: the improved valve is characterized in that a threaded hole (304) is formed in the connecting portion (302), a screw rod (9) is connected to the threaded hole (304) in a threaded mode, an insertion hole (501) is formed in the bottom of the valve rod (5), a waist-shaped hole (502) is formed in the valve rod (5), the waist-shaped hole (502) penetrates through the insertion hole (501), the connecting portion (302) is located in the insertion hole (501), two ends of the screw rod (9) are located in the waist-shaped hole (502), the screw rod (9) can move up and down in the waist-shaped hole (502) after the screw rod (9) is connected with the first valve core (3), and the maximum compression amount of the first compression spring (6) is larger than the maximum moving distance of the screw rod (9) in the waist-shaped hole (502).

4. A compound sealing valve as defined in claim 1, wherein: the valve rod (5) comprises an upper valve rod (503) and a lower valve rod (504), and the upper valve rod (503) and the lower valve rod (504) are connected through a compensator (10); go up the upper portion and support (7) threaded connection of valve rod (503), go up the lower part and compensator (10) fixed connection of valve rod (503), lower valve rod (504) and compensator (10) swing joint, go up and be equipped with second compression spring (11) between valve rod (503) and lower valve rod (504), second compression spring (11) are located compensator (10) inside, side fixedly connected with of compensator (10) prevents changeing card (12), prevent changeing card (12) and support (7) swing joint, just it only can reciprocate along support (7) to prevent changeing card (12).

5. A compound sealing valve as defined in claim 4, wherein: the upper valve rod (503) comprises a trapezoidal screw rod (5031) and a trapezoidal nut (5032), the trapezoidal screw rod (5031) is in threaded connection with the trapezoidal nut (5032), the trapezoidal nut (5032) extends out from the top end of the bracket (7), and the trapezoidal nut (5032) is rotatably connected with the bracket (7).

6. A compound sealing valve as defined in claim 1, wherein: the lower end of the support (7) is connected with a valve cover (13), a filler (14) is arranged in the valve cover (13), the valve rod (5) penetrates through the middle of the filler (14), and the valve body (1), the valve seat (2) and the valve cover (13) are fixedly connected together through a bolt (15).

7. A compound sealing valve as defined in claim 6, wherein: a pressing sleeve (16) is arranged in the partition hole (103), the bottom of the pressing sleeve (16) is in mutual contact with the valve seat (2), and the top of the pressing sleeve (16) is in mutual contact with the end face of the valve cover (13).

8. A compound sealing valve as defined in claim 6, wherein: a positioning sleeve (17) is arranged between the support (7) and the valve cover (13), and the bolt (15) penetrates through the positioning sleeve (17).

9. A compound sealing valve as defined in claim 6, wherein: sealing gaskets (18) are arranged between the valve cover (13) and the valve body (1) and between the valve seat (2) and the valve body (1); the bottom of the packing (14) is provided with a metal gasket (20), and the metal gasket (20) is arranged between the packing (14) and the valve cover (13).

10. A compound sealing valve as defined in claim 1, wherein: the top of the valve rod (5) is connected with a hand wheel (19).