CN203656251U - Ball valve - Google Patents
Ball valve Download PDFInfo
- Publication number
- CN203656251U CN203656251U CN201420012738.5U CN201420012738U CN203656251U CN 203656251 U CN203656251 U CN 203656251U CN 201420012738 U CN201420012738 U CN 201420012738U CN 203656251 U CN203656251 U CN 203656251U
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- CN
- China
- Prior art keywords
- valve seat
- sealing
- contiguous block
- ball
- spheroid
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Abstract
The utility model relates to a ball valve. The ball valve comprises a valve seat which is located between a ball and a valve body, wherein the valve seat is hermetically connected with the valve body by virtue of a sealing element, the valve seat is hermetically connected with the ball by virtue of a sealing material, the radial distance between the center of the sealing surface of the sealing material and the center of the ball is L1, an elastic element is arranged in the groove of the valve body, one end of the elastic element is pressed against the radial end face of the valve seal, a connecting block for blocking the sealing element is fixedly connected to one side, far away from the ball, of the valve seat, the radial distance between the contact surface of the valve body with the sealing element and the center of the ball is L2, and L2 is greater than L1, and therefore, when a middle chamber is pressurized, the pressure difference between the two sides of the valve seat is toward a direction far away from the ball; when the pressure difference is greater than the resilience force, the valve seat is enabled to keep away from the ball, and therefore, self-pressure relief of the middle chamber of the ball valve is realized.
Description
Technical field
The utility model relates to a kind of technical field of valve manufacturing, specifically relates to a kind of ball valve.
Background technique
Ball valve is reliable owing to having sealing, and feature simple in structure, easy to maintenance, becomes one of widely used valve.It is few that the relatively side-mounted ball valve of top-loading ball valve has outer leak source, and pipe stress is on its impact advantage such as less, and top-loading ball valve is widely used because can realize easily on-line maintenance simultaneously.In top-loading ball valve, DBB and DIB are two kinds of valve seat functional forms, and wherein, DBB valve seat also claims single piston effect valve seat, and each valve seat can be resisted the active force of a direction, can discharge lumen.In the time that cavity pressure in valve raises (by API6D regulation, being generally 1.1 ~ 1.33 times higher than nominal pressure), the anti-valve seat that pushes away of middle cavity pressure, makes valve seat disengaging spheroid, pressure is discharged, thereby avoided the lumen potential safety hazard of bringing of extremely boosting.
Patent documentation CN201487293U discloses hollow automatic pressure relief ball valve, comprise valve body 5, spheroid 1, valve seat 2, valve seat support 4, in the groove of valve seat 2 inserted valve seat support 4 one end, in the groove of valve seat support 4 the other ends, be embedded in the groove that spring 3 is placed on valve body 1 inwall, valve seat support 4 one end and spheroid 1 outer wall phase wedging of being embedded valve seat 2, be provided with sealing gasket 6 between valve seat support 4 tops and valve body 5.When fixing ball valve, carry out pretension valve seat 2 with spring 3, when central cavity pressure raises extremely, air pressure passes between spheroid 1 and valve seat 2, thereby promotes valve seat 2 Compress Springs 3, and the gap between spheroid 1 and valve seat 2 is increased and releasing pressure automatically.
In ball valve is produced, be related to cost factor, above-mentioned sealing gasket is often selected rubber-like O-ring seals, as long as O-ring seals is fixed on valve seat support 4, O-ring seals just can seal, when lumen pressure anomaly raises, thereby increasing, the gap between spheroid 1 and valve seat 2 realizes lumen from decompression function.But, under special operation condition, such as: in the situation of low leakage, ultralow temperature or special media, rubber-like O-ring seals can not meet the demands, now need to use the Sealing of other kind, as spring energy-storage seal ring is realized sealing, and because spring energy-storage seal ring can be realized " selfsealings ", be that its sealability raises along with the rising of pressure, and grow its working life, can reduce friction, can be applicable under harsher environment, so, used widely in various fields.Due to the structural characteristics of spring energy-storage seal ring, cannot on valve seat support, slot and make it fixing, as shown in Figure 1, conventionally spring energy-storage seal ring need be arranged on to the afterbody of valve seat support, when central cavity pressure raises extremely, the pressure difference that acts on valve seat support 3 both sides is pushed valve seat support 3 to spheroid 1 after overcoming the spring-back force of spring 4, make sealing between valve seat support 3 and spheroid 1, therefore, the above-mentioned ball valve that is provided with spring energy-storage seal ring, when central cavity pressure raises extremely, cannot realize lumen from decompression function, make ball valve have potential safety hazard.
Model utility content
For this reason, technical problem to be solved in the utility model is to use in prior art the ball valve of the Sealing of spring-like accumulation of energy ring structure cannot realize lumen from decompression function, by appropriate design valve seat construction, thereby provide a kind of ball valve of the Sealing realization sealing that uses spring-like accumulation of energy ring structure still to there is the function of lumen from pressure release.
For solving the problems of the technologies described above, a kind of ball valve of the present utility model, comprise the valve seat being positioned between spheroid and valve body, described valve seat and described valve body are tightly connected by Sealing, between described valve seat and described spheroid, be tightly connected by sealing material, radial distance between the center of described sealing material sealing surface and the centre of sphere of described spheroid is L1, in the groove of described valve body, be provided with elastic component, one end of described elastic component is pressed against on the radial end face of described valve seat, described valve seat away from described spheroid a side be fixedly connected with the contiguous block of keeping out described Sealing, the surface of contact of described valve body and described Sealing is L2 to the radial distance between the centre of sphere of described spheroid, L2 is greater than L1, and when lumen entrance pressure, the pressure difference that acts on described valve seat two ends makes described valve seat away from described spheroid after overcoming the spring-back force of described elastic component.
Described valve seat forms step, and the seal clearance forming between the axial end of described step and described valve body, for placing described Sealing, forms projection on described contiguous block, and described projection stretches in described seal clearance.
Described contiguous block is threadedly connected on the axial end of described valve seat, is provided with locking on the radial end face of described contiguous block and described valve seat, and described locking is fixedly connected on described valve seat.
Described locking is welded to connect on described valve seat.
Described contiguous block forms groove on the radial end face away from described Sealing, described locking the metal bar for the described groove of insertion.
Described contiguous block is bolted to connection on the radial end face of described valve seat.
Described contiguous block is L shaped, and its one end is stretched in described seal clearance.
Between described bolt and described contiguous block, be provided with lock washer.
Described elastic component is spring, and described spring is the one in cylindrical spring, wavy spring or belleville spring.
Described Sealing is spring energy-storage seal ring.
Technique scheme of the present utility model has the following advantages compared to existing technology,
1, in the utility model, between spheroid and valve body, be provided with valve seat, valve seat and valve body are tightly connected by Sealing; Between valve seat and spheroid, be tightly connected by sealing material, make ball valve in sealing state; And be fixedly connected with contiguous block at valve seat away from a side of spheroid, it is for when the lumen entrance pressure, and Sealing is resisted against on contiguous block; Because the radial distance between the center of sealing material sealing surface and the centre of sphere of spheroid is L1, the surface of contact of valve body and Sealing is L2 to the radial distance between the centre of sphere of spheroid, and L2 is greater than L1.In the time of lumen entrance pressure, act on the pressure difference of valve seat both sides towards the direction away from spheroid; In groove due to valve body, be provided with elastic component, one end of elastic component is pressed against on the radial end face of valve seat, therefore, and above-mentioned pressure difference compression elastic piece, after pressure difference is greater than the spring-back force of elastic component, make valve seat away from spheroid, thereby the lumen of realizing ball valve is from decompression function.
2, in the utility model, valve seat forms step, the seal clearance forming between the axial end of step and valve body is for placing Sealing, on contiguous block, form projection, projection stretches in seal clearance, to reduce the length of seal clearance, reduced the distance that Sealing moves with pressure medium, reduce the Sealing damage that Sealing causes because of mobile generation friction, extend the working life of Sealing, Sealing is spring energy-storage seal ring, and its sealability of spring energy-storage seal ring raises along with the rising of pressure, and is applicable under harsher environment.
3, in the utility model, contiguous block is threadedly connected on the axial end of valve seat, is provided with locking on the radial end face of contiguous block and valve seat, and locking is fixedly connected on valve seat, loosening to prevent contiguous block.
4,, in the utility model, contiguous block is bolted to connection on the radial end face of valve seat.Wherein, contiguous block is L shaped, and its one end is stretched in the seal clearance of Sealing, and the other end fits on the radial end face of valve seat.Between bolt and contiguous block, be provided with lock washer, in the time that bolton puts in place, the bending of lock washer one end is attached in a plane of bolt, and the other end bending is attached on the internal diameter of contiguous block, thereby prevents bolt looseness.
Accompanying drawing explanation
For content of the present utility model is more likely to be clearly understood, according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is the structural representation of the ball valve of prior art;
Fig. 2 is the structural representation of the utility model ball valve;
The stressed structural representation of valve seat when Fig. 3 is the ball valve lumen entrance pressure of Fig. 2;
Fig. 4 is locking structural representation that inserts contiguous block in the ball valve of Fig. 2;
Fig. 5 is the structural representation of the ball valve of the another kind of structure of the utility model;
In figure, reference character is expressed as: 1-spheroid, 2-valve body, 3-valve seat, 31-step, 4-sealing material, 5-Sealing, 6-contiguous block, 61-projection, locking of 7-, 8-spring, 9-bolt, 10-lock washer.
Embodiment
A kind of ball valve that Fig. 2 provides for the present embodiment, comprise the valve seat 3 being positioned between spheroid 1 and valve body 2, valve seat 3 is tightly connected by Sealing 5 with valve body 2, between valve seat 3 and spheroid 1, be tightly connected by sealing material 4, radial distance between the center of sealing material 4 sealing surfaces and the centre of sphere of spheroid 1 is L1, in the groove of valve body 2, be provided with elastic component 8, one end of elastic component 8 is pressed against on the radial end face of valve seat 3, be fixedly connected with the contiguous block 6 of keeping out Sealing 5 away from a side of spheroid 1 at valve seat 3, the surface of contact of valve body 2 and Sealing 5 is L2 to the radial distance between the centre of sphere of spheroid 1, L2 is greater than L1, and when lumen entrance pressure, the pressure difference that acts on valve seat 3 two ends makes valve seat 3 away from spheroid 1 after overcoming the spring-back force of elastic component 8, realize lumen from decompression function.
Technique scheme is core technology scheme of the present utility model, between spheroid 1 and valve body 2, is provided with valve seat 3, and valve seat 3 is tightly connected by Sealing 5 with valve body 2; Between valve seat 3 and spheroid 1, be tightly connected by sealing material 4, make ball valve in sealing state; And the contiguous block 6 that has been threaded on the axial plane at valve seat 3 away from spheroid 1, it is for when the lumen entrance pressure, and Sealing 5 is resisted against on contiguous block 6; Radial distance between the center of sealing material 4 sealing surfaces and the centre of sphere of spheroid 1 is L1, and the surface of contact of valve body 2 and Sealing 5 is L2 to the radial distance between the centre of sphere of spheroid 1, and L2 is greater than L1; As shown in Figure 3, the pressure difference that acts on valve seat 3 both sides in the time of lumen entrance pressure is towards the direction away from spheroid 1; In groove due to valve body 2, be provided with elastic component 8 again, one end of elastic component 8 is pressed against on the radial end face of valve seat 3, therefore, and above-mentioned pressure difference compression elastic piece 8, after pressure difference is greater than the spring-back force of elastic component 8, make valve seat 3 away from spheroid 1, thereby the lumen of realizing ball valve is from decompression function.
As concrete structure of the present utility model, the described Sealing 5 that the present embodiment is selected is spring energy-storage seal ring, the concrete structure of now placing described Sealing 5 is: valve seat 3 forms step 31, the seal clearance forming between the axial end of step 31 and valve body 2 is used for placing Sealing 5, on contiguous block 6, form projection 61, projection 61 stretches in seal clearance, to reduce the length of seal clearance, reduced the distance that Sealing 5 moves with pressure medium, reducing Sealing 5 produces the Sealing 5 that friction causes and damages because of mobile, extend the working life of Sealing 5, its sealability of spring energy-storage seal ring raises along with the rising of pressure, and be applicable under harsher environment.
In the utility model, contiguous block 6 is not unique with the fixed connection structure of valve body 3, and below in conjunction with Fig. 2, Fig. 4 illustrates two kinds of different linkage structures.As shown in Figure 2, contiguous block 6 is threadedly connected on the axial end of valve seat 3, loosening in order to prevent contiguous block 6, on the radial end face of contiguous block 6 and valve seat 3, is provided with locking 7, and locking 7 is fixedly connected on valve seat 3.
Above-mentioned locking 7 to be fixed on the mode that is fixedly connected with on valve seat 3 not unique, and the present embodiment provides a kind of concrete mode that is fixedly connected with, and locking 7 is welded to connect on valve seat 3.Certainly, contiguous block 6 is not unique with the mode that is fixedly connected with between locking 7 yet, and the present embodiment also provides a kind of concrete mode that is fixedly connected with, and contiguous block 6 forms groove on the radial end face away from Sealing 5, and locking 7 is inserted groove.The above-mentioned mode that is fixedly connected with, makes contiguous block 6 be fixed on simple in structure on valve seat 3.
Fig. 4 is the another kind of fixed connection structure of contiguous block 6 and valve seat 3, and contiguous block 6 is fixedly connected on the radial end face of valve seat 3 by bolt 9.Wherein, contiguous block 6 is L shaped, and its one end is stretched in the seal clearance of Sealing 5, and the other end fits on the radial end face of valve seat.Between bolt 9 and contiguous block 6, be provided with lock washer 10, when bolt 9 is fastening while putting in place, lock washer 10 one end bendings are attached in a plane of bolt 9, and the other end bending is attached on the internal diameter of contiguous block 6, thereby prevents that bolt 9 is loosening.Elastic component 8 of the present utility model can be spring, and spring is the one in cylindrical spring, wavy spring or belleville spring, and needing can be according to practical operation time selected.Due to the common practise that the structural type of spring is those skilled in the art, be not described in detail herein.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to mode of execution.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all mode of executions.And among the protection domain that the apparent variation of being extended out thus or variation are still created in the utility model.
Claims (10)
1. a ball valve, comprise the valve seat (3) being positioned between spheroid (1) and valve body (2), described valve seat (3) is tightly connected by Sealing (5) with described valve body (2), between described valve seat (3) and described spheroid (1), be tightly connected by sealing material (4), radial distance between the center of described sealing material (4) sealing surface and the centre of sphere of described spheroid (1) is L1, in the groove of described valve body (2), be provided with elastic component (8), one end of described elastic component (8) is pressed against on the radial end face of described valve seat (3), it is characterized in that:
Be fixedly connected with the contiguous block (6) of keeping out described Sealing (5) away from a side of described spheroid (1) at described valve seat (3), the surface of contact of described valve body (2) and described Sealing (5) is L2 to the radial distance between the centre of sphere of described spheroid (1), L2 is greater than L1, and when lumen entrance pressure, the pressure difference that acts on described valve seat (3) two ends makes described valve seat (3) away from described spheroid (1) after overcoming the spring-back force of described elastic component (8).
2. a kind of ball valve according to claim 1, it is characterized in that: described valve seat (3) forms step (31), the seal clearance forming between the axial end of described step (31) and described valve body (2) is used for placing described Sealing (5), on described contiguous block (6), form projection (61), described projection (61) stretches in described seal clearance.
3. a kind of ball valve according to claim 1 and 2, it is characterized in that: described contiguous block (6) is threadedly connected on the axial end of described valve seat (3), on the radial end face of described contiguous block (6) and described valve seat (3), be provided with locking (7), described locking (7) are fixedly connected on described valve seat (3).
4. a kind of ball valve according to claim 3, is characterized in that: described locking (7) are welded to connect on described valve seat (3).
5. a kind of ball valve according to claim 3, is characterized in that: described contiguous block (6) forms groove on the radial end face away from described Sealing (5), and described locking (7) insert described groove.
6. a kind of ball valve according to claim 1, is characterized in that: described contiguous block (6) is fixedly connected on the radial end face of described valve seat (3) by bolt (9).
7. a kind of ball valve according to claim 6, is characterized in that: described contiguous block (6) is for L shaped, and its one end is stretched in described seal clearance.
8. a kind of ball valve according to claim 6, is characterized in that: between described bolt (9) and described contiguous block (6), be provided with lock washer (10).
9. a kind of ball valve according to claim 1, is characterized in that: described elastic component (8) is spring, and described spring is the one in cylindrical spring, wavy spring or belleville spring.
10. a kind of ball valve according to claim 1, is characterized in that: described Sealing (5) is spring energy-storage seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420012738.5U CN203656251U (en) | 2014-01-09 | 2014-01-09 | Ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420012738.5U CN203656251U (en) | 2014-01-09 | 2014-01-09 | Ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203656251U true CN203656251U (en) | 2014-06-18 |
Family
ID=50922639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420012738.5U Expired - Fee Related CN203656251U (en) | 2014-01-09 | 2014-01-09 | Ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203656251U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587890A (en) * | 2016-02-29 | 2016-05-18 | 苏州纽威阀门股份有限公司 | Pressure relief device and ball valve with same |
-
2014
- 2014-01-09 CN CN201420012738.5U patent/CN203656251U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587890A (en) * | 2016-02-29 | 2016-05-18 | 苏州纽威阀门股份有限公司 | Pressure relief device and ball valve with same |
| CN105587890B (en) * | 2016-02-29 | 2019-04-09 | 苏州纽威阀门股份有限公司 | A kind of pressure relief device and the ball valve with the pressure relief device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20220109 |