CN215673619U

CN215673619U - Stop valve

Info

Publication number: CN215673619U
Application number: CN202122055848.2U
Authority: CN
Inventors: 郭培生; 陈太东; 强美蓉; 郎基豪
Original assignee: Shanghai Yongtai Valve Co ltd
Current assignee: Shanghai Yongtai Valve Co ltd
Priority date: 2021-08-28
Filing date: 2021-08-28
Publication date: 2022-01-28
Anticipated expiration: 2031-08-28

Abstract

The application relates to a stop valve, including valve body and valve rod, the valve body is equipped with the valve gap, the valve rod passes the valve gap, the valve rod is located one end in the valve body is equipped with the valve clack, the valve rod cover is equipped with bowl, bowl is located the valve gap with between the valve clack, the interior concave surface orientation of bowl, the valve gap, bowl with be equipped with the elastic component between the valve clack, the elastic component forces bowl butt the valve gap, bowl with the valve rod reaches the valve gap forms annular closed cavity altogether. This application has the effect that leaks between the valve gap that reduces the stop valve and the valve rod.

Description

Stop valve

Technical Field

The application relates to the field of valves, in particular to a stop valve.

Background

The shut-off valve is also called a shut-off valve, and belongs to a forced sealing type valve, so when the valve is closed, pressure must be applied to the valve clack to force the sealing surface not to leak. The valve rod is lifted to drive the valve clack to move linearly along the central line of the valve seat to open and close the stop valve.

The valve rod in the stop valve runs through the valve body, and the valve rod seals with filler, sealing washer etc. usually, in the stop valve use, easily appears sealing not tight problem that appears leaking water between valve rod and the valve body.

SUMMERY OF THE UTILITY MODEL

In order to reduce the not tight condition that leaks appearing of sealed between valve rod and the valve body of stop valve, this application provides a stop valve.

The application provides a stop valve adopts following technical scheme:

the utility model provides a stop valve, includes valve body and valve rod, the valve body is equipped with the valve gap, the valve rod passes the valve gap, the valve rod is located one end in the valve body is equipped with the valve clack, the valve rod cover is equipped with the bowl, the bowl is located the valve gap with between the valve clack, the interior concave surface orientation of bowl the valve gap, the bowl with be equipped with the elastic component between the valve clack, the elastic component forces the bowl butt the valve gap, the bowl with the valve rod reaches the valve gap forms annular closed cavity altogether.

By adopting the technical scheme, the elastic piece forces the bowl-shaped piece to abut against the inner surface of the valve cover, so that the bowl-shaped piece, the valve cover and the valve rod form an annular closed cavity together, fluid in the valve body can only enter the closed cavity through a gap between the bowl-shaped piece and the inner surface of the valve cover and a gap between the bowl-shaped piece and the peripheral surface of the valve rod, the fluid can enter the closed cavity by overcoming large resistance, and the impact effect on a sealing structure between the valve rod and the valve cover is reduced after the fluid enters the closed cavity, so that the water leakage condition caused by untight sealing between the valve rod and the valve body is reduced; the pressure of the fluid at the closed end of the valve clack is usually higher, when the valve clack is driven by the valve rod to open, the pressure of the fluid flowing to the space between the valve rod and the valve cover is increased, and the valve clack and the valve cover are close to each other, so that the elastic piece is pressed, the elastic piece applies pressure to the valve cover, the pressure between the bowl-shaped piece and the valve cover is increased, and the fluid is more difficult to enter the closed cavity through a gap between the bowl-shaped piece and the valve cover.

Optionally, the inner side surface of the valve cover is provided with a first rubber layer.

Through adopting above-mentioned technical scheme, can improve the leakproofness between bowl form piece and the valve gap internal surface through setting up first rubber layer.

Optionally, the bowl-shaped part comprises a bowl-shaped part and a tubular part, the inner hole of the tubular part is communicated with the bowl-shaped part, and the tubular part is sleeved with the valve rod and connected with the valve rod.

Through adopting above-mentioned technical scheme, the bowl-shaped part is established through tubular portion and valve rod cover and is connected, makes and need pass through the route of longer gap form through getting into closed cavity between bowl-shaped part and the valve rod in the fluid in the valve body to be favorable to promoting the barrier effect of the gap between tubular portion and the valve rod to the process of fluid inflow closed cavity, the impact to the seal structure between valve rod and the valve gap is further reduced after the fluid gets into closed cavity.

Optionally, the tubular portion is located the bowl-shaped portion is kept away from one side of the valve cover, the elastic member is a compression spring, and one end of the compression spring is connected with the tubular portion in a sleeved mode.

By adopting the technical scheme, the compression spring is sleeved and connected with the tubular part, namely the compression spring is abutted against the bowl-shaped part; the space in the valve body is limited, so that the space for installing the spring between the bowl-shaped part and the valve clack is limited, and the outer convex surface of the bowl-shaped part is larger than the distance between the end surface of the tubular part and the valve clack, so that larger installation space can be provided for the spring.

Optionally, the elastic member is a rubber sleeve, and two ends of the rubber sleeve are respectively abutted to the bowl-shaped member and the valve flap.

Through adopting above-mentioned technical scheme, the both ends of rubber sleeve respectively with bowl form piece and valve clack butt, can play the sealed effect to the gap between valve rod and the bowl form piece to be favorable to further reducing the impact effect of fluid to the seal structure between valve rod and the valve gap.

Optionally, the diameter of the rubber sleeve gradually increases in a direction away from the bowl.

Through adopting above-mentioned technical scheme, the clearance between rubber sleeve and the valve rod is crescent along the direction of keeping away from the bowl form piece, makes the whole round platform column structure that is of rubber sleeve, is favorable to promoting the stability of the structure of rubber sleeve.

Optionally, the outer circumferential surface of the rubber sleeve is an arc-shaped convex surface.

Through adopting above-mentioned technical scheme, the outer peripheral face of rubber sleeve is established to the outer convex surface of arc, when the rubber sleeve pressurized, can make the perisporium of rubber sleeve tend to outwards bulge to warp to reduce the outside condition of bulging of rubber sleeve part and other part inwards sunken, thereby be favorable to making the rubber sleeve warp comparatively evenly.

Optionally, the rubber sleeve comprises a rubber main body and a spring steel rib, and the spring steel rib is wrapped inside the rubber main body.

Through adopting above-mentioned technical scheme, be favorable to promoting the intensity of rubber sleeve through setting up the spring reinforcing bar to and the elasticity of increase rubber sleeve, after the rubber subject is ageing, the spring reinforcing bar can make the rubber sleeve keep elasticity.

In summary, the present application includes at least one of the following beneficial technical effects:

the elastic piece forces the bowl-shaped piece to abut against the inner surface of the valve cover, so that the bowl-shaped piece, the valve cover and the valve rod form an annular closed cavity together, fluid in the valve body can only enter the closed cavity through a gap between the bowl-shaped piece and the inner surface of the valve cover and a gap between the bowl-shaped piece and the peripheral surface of the valve rod, the fluid needs to overcome large resistance and enters the closed cavity, and after the fluid enters the closed cavity, the impact effect on a sealing structure between the valve rod and the valve cover is reduced, so that the condition of water leakage caused by untight sealing between the valve rod and the valve body is reduced;

the elastic part is set as a rubber sleeve, and the two ends of the rubber sleeve are respectively abutted with the bowl-shaped part and the valve clack, so that a gap between the valve rod and the bowl-shaped part can be sealed, and the impact effect of fluid on a sealing structure between the valve rod and the valve cover is further reduced.

Drawings

FIG. 1 is a schematic structural view of example 1.

FIG. 2 is a schematic structural view of example 2.

Fig. 3 is a partial enlarged view at a in fig. 2.

Description of reference numerals: 1. a valve body; 2. a valve stem; 21. an external thread; 3. a valve cover; 31. a connecting member; 32. a first rubber layer; 4. sealing and filling; 5. a valve flap; 6. a hand wheel; 7. a nut; 8. a bowl-shaped member; 81. a bowl-shaped portion; 82. a tubular portion; 9. an elastic member; 91. a compression spring; 92. a rubber sleeve; 921. a rubber body; 922. a spring steel rib; 10. the chamber is closed.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a stop valve.

Example 1:

referring to fig. 1, the stop valve includes valve body 1 and valve rod 2, valve body 1 is equipped with valve gap 3, valve rod 2 passes valve gap 3, be equipped with sealing filler 4 between valve rod 2 and the valve gap 3, the one end that valve rod 2 is located valve body 1 is equipped with valve clack 5, the one end that valve rod 2 is located the valve gap 3 outside is equipped with hand wheel 6, and the one end that valve rod 2 is located the valve gap 3 outside is equipped with external screw thread 21, the outside an organic whole of valve gap 3 is provided with connecting element 31, connecting element 31 keeps away from one end threaded connection of valve gap 3 has nut 7 with the adaptation of external screw thread 21. The valve rod 2 and the nut 7 can rotate relatively spirally by rotating the hand wheel 6, so that the valve clack 5 is driven to lift to open and close the stop valve.

Referring to fig. 1, a bowl-shaped part 8 is sleeved on a valve rod 2, and the bowl-shaped part 8 is positioned between a valve cover 3 and a valve clack 5; the bowl-shaped part 8 comprises a bowl-shaped part 81 and a tubular part 82 which are of a bowl-shaped structure, the tubular part 82 is positioned on one side, far away from the valve cover 3, of the bowl-shaped part 81, the tubular part 82 in the inner cavity of the bowl-shaped part is communicated, the tubular part 82 is connected with the valve rod 2 in a sleeved mode, the tubular part 82 is in clearance fit with the valve rod 2, and the inner concave surface of the bowl-shaped part 81 faces towards the valve cover 3. An elastic part 9 is arranged between the bowl-shaped part 8 and the valve clack 5, the elastic part 9 forces the edge of the bowl-shaped part 8 to abut against the inner side surface of the valve cover 3, the inner side surface of the valve cover 3 is covered with a first rubber layer 32, and the bowl-shaped part 8, the valve rod 2 and the valve cover 3 form an annular closed chamber 10 together.

Referring to fig. 1, the elastic member 9 is a compression spring 91, the compression spring 91 is sleeved and connected with the valve rod 2, one end of the compression spring 91 is abutted against the valve cap 3, and the other end of the compression spring 91 is sleeved and connected with the tubular portion 82 of the bowl-shaped member 8 and abutted against the outer convex surface of the bowl-shaped portion 81.

The implementation principle of a stop valve of the embodiment of the application is as follows: the compression spring 91 forces the bowl 8 to abut against the inner surface of the valve cover 3, so that the bowl 8, the valve cover 3 and the valve rod 2 together form an annular closed chamber 10, fluid in the valve body 1 can only enter the closed chamber 10 through a gap between the bowl 8 and the inner side surface of the valve cover 3 and a gap between the bowl 8 and the peripheral surface of the valve rod 2, wherein, a sealing function is formed between the bowl-shaped part 8 and the first rubber layer 32 on the inner side surface of the valve cover 3, and the gap path formed by the matching of the bowl-shaped part 82 and the valve rod 2 is longer, so that the fluid in the valve body 1 needs to overcome larger resistance to enter the closed chamber 10, the impact of the fluid on the packing 4 between the stem 2 and the bonnet 3 is reduced after it has entered the above-mentioned closed chamber 10, thereby be favorable to reducing the condition that the sealing performance of the sealing filler 4 between valve gap 3 and the valve rod 2 weakens, and then reduce because of the not tight condition that appears leaking water of sealing between valve rod 2 and the valve body 1.

In addition, when the valve clack 5 is driven by the valve rod 2 to be close to the valve cover 3 to open the stop valve, the pressure of the fluid in the valve body 1 is increased, and at the moment, the compression spring 91 is compressed, so that the pressure between the bowl-shaped part 8 and the valve cover 3 is increased, and the fluid is more difficult to enter the closed chamber 10 through a gap between the bowl-shaped part 8 and the valve cover 3.

Example 2:

referring to fig. 2 and 3, the present embodiment is different from embodiment 1 in that: the elastic part 9 is a rubber sleeve 92, two ends of the rubber sleeve 92 are respectively abutted with the bowl-shaped part 8 and the valve clack 5, and the rubber sleeve 92 has a sealing effect on a gap between the valve rod 2 and the bowl-shaped part 8 besides the function of elastic extrusion of the bowl-shaped part 8.

Referring to fig. 3, the diameter of the rubber sleeve 92 gradually increases along a direction away from the bowl-shaped member 8, that is, the rubber sleeve 92 is integrally in a taper pipe structure, and the outer peripheral surface of the rubber sleeve 92 is an arc-shaped outer convex surface. When the valve rod 2 drives the valve clack 5 to be close to the valve cover 3 so as to open the stop valve, the rubber sleeve 92 is pressed to deform, the outer peripheral surface of the rubber is designed into an arc-shaped outer convex surface, so that all parts of the rubber sleeve 92 tend to protrude outwards and deform, the rubber sleeve 92 is not easy to partially sink inwards, and the rubber sleeve 92 deforms uniformly due to the fact that the part protrudes outwards.

Referring to fig. 3, the elastic sleeve includes a rubber body 921 and a spring steel rib 922, the rubber sleeve 92 includes a rubber body 921 and a spring steel rib 922, and the spring steel rib 922 is wrapped inside the rubber body 921. The spring steel ribs 922 can strengthen the structural strength of the rubber sleeve 92, and after the rubber body 921 ages, the spring steel ribs 922 can keep the rubber sleeve 92 elastic for a longer time.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a stop valve, includes valve body (1) and valve rod (2), valve body (1) is equipped with valve gap (3), valve rod (2) pass valve gap (3), valve rod (2) are located one end in valve body (1) is equipped with valve clack (5), its characterized in that: valve rod (2) cover is equipped with bowl (8), bowl (8) are located valve gap (3) with between valve clack (5), the interior concave surface orientation of bowl (8) valve gap (3), bowl (8) with be equipped with elastic component (9) between valve clack (5), elastic component (9) force bowl (8) butt valve gap (3), bowl (8) with valve rod (2) reach valve gap (3) are formed annular closed cavity (10) altogether.

2. A shut-off valve as claimed in claim 1, wherein: the inner side surface of the valve cover (3) is provided with a first rubber layer (32).

3. A shut-off valve as claimed in claim 1, wherein: bowl (8) are including bowl shape portion (81) and tubular portion (82) of bowl shape structure, the hole of tubular portion (82) with bowl shape portion (81) link up, tubular portion (82) with valve rod (2) cover is established and is connected.

4. A shut-off valve as claimed in claim 3, wherein: tubular portion (82) are located bowl shape portion (81) are kept away from valve gap (3) one side, elastic component (9) are compression spring (91), the one end of compression spring (91) with tubular portion (82) cover is established and is connected.

5. A shut-off valve as claimed in claim 1, wherein: the elastic piece (9) is a rubber sleeve (92), and two ends of the rubber sleeve (92) are respectively abutted against the bowl-shaped piece (8) and the valve clack (5).

6. A shut-off valve as claimed in claim 5, wherein: the diameter of the rubber sleeve (92) is gradually increased along the direction far away from the bowl-shaped piece (8).

7. A shut-off valve as claimed in claim 6, wherein: the peripheral surface of the rubber sleeve (92) is an arc-shaped convex surface.

8. A shut-off valve as claimed in claim 5, wherein: the rubber sleeve (92) comprises a rubber main body (921) and a spring steel rib (922), wherein the spring steel rib (922) is wrapped inside the rubber main body (921).