阅读说明：本技术 活接球阀 (Loose joint ball valve ) 是由 郑志勇 李德松 郑桂凤 翁维平 徐正家 周兴良 于 2021-07-02 设计创作，主要内容包括：本发明提供了活接球阀,属于阀门技术领域。它解决了安全性不高、连接易松动造成密封失效的问题。它包括出水接头以及沿轴向贯穿设置有流道的阀体,流道包括内径依次变小的第一部分、第二部分与第三部分,第二部分内设有从第一部分放入的球芯与密封件,第二部分内壁与第三部分内壁之间连接有环形抵靠面,密封件设于球芯与环形抵靠面之间形成密封,出水接头依次经第一部分与第二部分放入至第三部分内,第三部分远离第二部分的口部处设有环形挡肩,密封件将第三部分靠近第二部分的口部部分遮挡,出水接头包括沿轴向限位于密封件与环形挡肩之间的密封段以及从环形挡肩中心处穿出的外接段。它具有安全性高、连接牢固、密封可靠等优点。(The invention provides a loose joint ball valve, and belongs to the technical field of valves. The problem of sealing failure caused by low safety and easy looseness of connection is solved. It includes the water outlet connector and runs through the valve body that is provided with the runner along the axial, the runner includes the internal diameter first part that diminishes in proper order, second part and third part, be equipped with ball core and the sealing member of putting into from the first part in the second part, be connected with the annular between second part inner wall and the third part inner wall and support the face, the sealing member is located ball core and annular and is supported and support and form sealedly between the face, the water outlet connector is put into to the third part through first part and second part in proper order, the oral area department that the second part was kept away from to the third part is equipped with the annular and keeps off the shoulder, the sealing member shelters from the oral area part that the third part is close to the second part, the water outlet connector includes that the axial is spacing in sealing section between sealing member and annular fender shoulder and the external section of wearing out from annular fender shoulder center. The novel connecting device has the advantages of high safety, firm connection, reliable sealing and the like.)

1. A loose joint ball valve comprises a water outlet joint (9) and a valve body (1) which is axially provided with a flow passage (1a) in a penetrating manner, wherein the flow passage (1a) comprises a first part (1a1), a second part (1a2) and a third part (1a3) of which the inner diameter is sequentially reduced, a ball core (2) and a sealing element (5) which are put into the second part (1a1) are arranged in the second part (1a2), an annular abutting surface (1c) is connected between the inner wall of the second part (1a2) and the inner wall of the third part (1a3), the sealing element (5) is arranged between the ball core (2) and the annular abutting surface (1c) to form sealing, and the loose joint ball valve is characterized in that the water outlet joint (9) is sequentially put into the third part (1a3) through the first part (1a1) and the second part (1a2), and an annular retaining shoulder (31) is arranged at the position, far away from the second part (1a2), of the third part (1a3), the sealing element (5) partially shields the third part (1a3) close to the mouth of the second part (1a2), and the water outlet joint (9) comprises a sealing section (9a) limited between the sealing element (5) and the annular retaining shoulder (1a31) along the axial direction and a circumscribed section (9b) penetrating out of the center of the annular retaining shoulder (1a 31).

2. The ball valve according to claim 1, characterized in that the distance between the sealing element (5) and the annular blocking shoulder (1a31) is slightly larger than the length of the sealing section (9a), and the periphery of the sealing section (9a) is provided with a sealing ring III (10).

3. The loose joint ball valve according to claim 1 or 2, characterized in that the sealing element (5) comprises a first sealing ring (5a) and a gasket (5b), the gasket (5b) abuts against the annular abutting surface (1c), the first sealing ring (5a) abuts against the ball core (2) and the gasket (5b) respectively to form a seal, and the inner diameter of the gasket (5b) is smaller than the outer diameter of the sealing section (9 a).

4. A loose joint ball valve according to claim 3, characterized in that said gasket (5b) is made of a metal material, and a hard seal is formed between the gasket (5b) and the annular abutment surface (1 c).

5. The ball-and-socket joint according to claim 1 or 2, wherein the sealing element (5) comprises an annular sealing seat which abuts against the annular abutment surface (1c) and against which the core (2) forms a seal, the inner diameter of the annular sealing seat being smaller than the outer diameter of the sealing segment (9 a).

6. The ball valve according to claim 1 or 2, characterized in that the connection between the outer wall of the sealing section (9a) and the outer wall of the external section (9b) forms a step (9c) which can be matched with the annular retaining shoulder (1a 31).

7. The ball-and-socket joint valve according to claim 6, wherein the outer periphery of the circumscribed section (9b) is provided with a plurality of convex rings (9b1) along the axial direction.

Technical Field

The invention belongs to the technical field of valves, and relates to a ball valve, in particular to a loose joint ball valve.

Background

The ball valve is mainly used for cutting off, distributing and changing the flowing direction of a medium, and is widely applied to industries such as petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal administration, steel and the like. The ball valve is communicated or cut off by means of the ball core arranged inside, the communicating hole is arranged on the ball core in a penetrating mode, and sealing rings are arranged at the hole openings at the two ends of the communicating hole of the ball core respectively to guarantee sealing.

Traditional ball valve directly utilizes both ends and pipe connection, receives environmental restriction easily and leads to connecting inconveniently when actual operation, leads to the ball valve can't directly be connected with the pipe fitting because of the material is different moreover. Therefore, a ball valve with a loose joint function appears in the market, a common loose joint mode at present is to abut a joint against one end part of a valve body, then a nut is sleeved on the joint and then directly connected with the end part of the valve body in a threaded manner, the joint is pressed at one end part of the valve body by the nut so that the joint and the valve body cannot be separated, meanwhile, the joint and the valve body can rotate relatively due to the fact that the joint and the valve body are not directly fixed, and sealing is achieved by arranging a sealing gasket between one end part of the valve body and one end face of the joint, for example, the high-sealing single loose joint ball valve disclosed by application number 201420801819.3.

However, such a ball-cock valve also has significant disadvantages: although the nuts are all in a screwing state after connection is completed so as to ensure sealing, in the actual use process, threads at the nuts are inevitably loosened due to pipeline vibration or torsion and the like, so that sealing failure is caused, if the nuts are screwed tightly by using a tool, the rotational resistance of the water outlet joint is large, and the water outlet joint is difficult to rotate in a matching manner when the pipe fitting is twisted; in addition, the nut is exposed outside, and other people can destroy the connection only by unscrewing the nut, so that the safety is not high.

Disclosure of Invention

The invention aims to solve the problems in the prior art, provides a loose joint ball valve and solves the problems of low safety and sealing failure caused by easy looseness of connection.

The purpose of the invention can be realized by the following technical scheme:

loose joint ball valve, including water connectors and along the axial run through the valve body that is provided with the runner, the runner include the internal diameter first portion, second portion and the third portion that diminish in proper order, be equipped with ball core and the sealing member of putting into from the first portion in the second portion, be connected with the annular between second portion inner wall and the third portion inner wall and lean on the face, the sealing member is located ball core and annular and is leaned on and form sealedly between the face, a serial communication port, water connectors put into to the third portion through first portion and second portion in proper order, the oral area department that the second portion was kept away from to the third portion is equipped with the annular and keeps off the shoulder, the sealing member shelters from the oral area part that the third portion is close to the second portion, water connectors includes along the axial spacing seal segment between sealing member and annular fender shoulder and keep off the external section that the shoulder center was worn out from to the annular.

During the assembly, put into the third part from the port department of first part earlier and wear out to the external section of water joint from annular fender shoulder center in the third part, then install sealing member and ball core in proper order in the second part, the sealing member supports against with ball core and annular respectively and leans on the face and forms sealedly. After the assembly is completed, the water outlet connector can rotate 360 degrees relative to the valve body, so that the active connection between the pipe fitting connected with the water outlet connector and the valve body is realized, and the loosening or leakage caused by the fact that the pipe fitting is twisted when the water outlet connector is limited by space or used is avoided. The sealing section of the water outlet joint is axially limited between the sealing element and the annular retaining shoulder, and the water outlet joint cannot be separated from the valve body.

According to the loose joint ball valve, the sealing element for realizing sealing is utilized to shield the part, close to the opening part of the second part, of the third part, meanwhile, the sealing element is limited by the ball core, and other structures outside the external connection section are all positioned in the valve body, so that the loose joint ball valve is better in integrity, higher in safety and not easy to damage; and the cooperation between water connectors and the valve body is also more firm for the connection of pipe fitting also becomes more firm, can not appear because of the nut is not hard up to cause to connect to drop or sealed the inefficacy.

In the loose joint ball valve, the distance between the sealing element and the annular blocking shoulder is slightly larger than the length of the sealing section, and a third sealing ring is arranged on the periphery of the sealing section.

The distance between the sealing element and the annular blocking shoulder is slightly larger than the length of the sealing section, so that the water outlet connector can axially move in a small range to ensure that the water outlet connector is more flexible when rotating relative to the valve body. And the periphery of the sealing section is provided with a third sealing ring, so that the sealing can be realized between the water outlet joint and the water outlet joint no matter how the water outlet joint moves.

In the above-mentioned loose joint ball valve, the sealing member includes a first sealing ring and a gasket, the gasket abuts against the annular abutting surface, the first sealing ring abuts against the ball core and the gasket respectively to form a seal, and the inner diameter of the gasket is smaller than the outer diameter of the sealing section.

After the water outlet joint is placed into the third part, a gasket and a first sealing ring are sequentially placed, and finally the ball core abuts against the first sealing ring to enable the gasket to be pressed on an annular abutting surface, and the first sealing ring abuts against the ball core and the gasket respectively to ensure normal sealing; and the inner diameter of the gasket is smaller than the outer diameter of the sealing section, so that the gasket is partially covered on the mouth part of the third part close to the second part, and the gasket is matched with the annular retaining shoulder to axially limit the sealing section.

In the above-mentioned loose joint ball valve, the gasket is made of metal material, and a hard seal is formed between the gasket and the annular abutting surface.

The gasket is made of metal materials, has higher hardness, is not easy to be damaged by continuous impact when the water outlet joint moves, and has firmer structure. Meanwhile, the valve body is made of metal materials, and hard sealing can be formed between the gasket and the annular abutting surface, so that the sealing effect of the loose joint ball valve is further improved.

In the loose joint ball valve, as another technical scheme, the sealing element comprises an annular sealing seat, the annular sealing seat is abutted against the annular abutting surface, the ball core is abutted against the annular sealing seat to form sealing, and the inner diameter of the annular sealing seat is smaller than the outer diameter of the sealing section.

In the loose joint ball valve, the outer wall of the sealing section and the outer wall of the external section are connected to form a step which can be matched with the annular retaining shoulder.

In the above-mentioned loose joint ball valve, the periphery of the external section is provided with a plurality of convex rings along the axial direction.

Compared with the prior art, this loose joint ball valve utilizes and realizes that sealed sealing member partially shelters from the oral area that the third part is close to the second portion, and the sealing member utilizes the ball core to carry on spacingly again simultaneously, and all the other structures except that the external section of water swivel all are located the valve body, therefore the wholeness is better, the security is higher, indestructible. And the cooperation between water connectors and the valve body is also more firm for the connection of pipe fitting also becomes more firm, can not appear because of the nut is not hard up to cause to connect to drop or sealed the inefficacy.

Drawings

FIG. 1 is a schematic view of the present articulated ball valve.

Fig. 2 is a cross-sectional view of the first embodiment of the ball valve.

Fig. 3 is an enlarged view of the collar and the sealing ring of fig. 2.

FIG. 4 is a cross-sectional view of the valve body of the present articulating ball valve.

In the figure, 1, a valve body; 1a, a flow channel; 1a1, first part; 1a2, second part; 1a3, third part; 1a31, annular shoulder; 1b, a boss; 1c, an annular abutting surface; 1d, annular abdicating grooves; 2. a ball core; 2a, water through holes; 3. a valve stem; 4. a handle; 5. a seal member; 5a, a first sealing ring; 5b, a gasket; 6. a second sealing ring; 7. a collar; 7a, a notch; 7b, a clamping flap; 8. an abutting sheet; 8a, a convex ring; 9. a water outlet joint; 9a, a sealing section; 9b, an external connection section; 9b1, convex ring; 9c, a step; 10. and a third sealing ring.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1, 2 and 4, the ball valve includes a valve body 1 with a flow passage 1a arranged along an axial direction in a penetrating manner, the flow passage 1a includes a first portion 1a1, a second portion 1a2 and a third portion 1a3, the inner diameter of the first portion 1a1 is reduced in sequence, a ball core 2 and a sealing member 5 are arranged in the second portion 1a2, a water passing hole 2a is arranged in the ball core 2 along the flow direction of the flow passage 1a in a penetrating manner, an annular abutting surface 1c is connected between the inner wall of the second portion 1a2 and the inner wall of the third portion 1a3, the sealing member 5 is arranged between the ball core 2 and the annular abutting surface 1c to form a seal, and particularly, the sealing member 5 is arranged at an end opening of the water passing hole 2 a. The lateral part of the valve body 1 is provided with a boss 1b, a valve rod 3 which is vertically arranged relative to the flow passage 1a is arranged in the boss 1b in a penetrating way, the lower end of the valve rod 3 is connected with the ball core 2, and the upper end of the valve rod 3 extends out of the valve body 1 and is connected with a handle 4. Furthermore, a second sealing ring 6 is further arranged in the second part 1a2, the second sealing ring 6 is positioned at the orifice at the other end of the water through hole 2a, a clamping ring 7 is arranged in the first part 1a1, and the clamping ring 7 abuts against the second sealing ring 6 to form sealing.

Further, as shown in fig. 2 and 3, an annular relief groove 1d is formed at the joint of the first part 1a1 and the second part 1a2, the outer diameter of the collar 7 gradually decreases along the insertion direction, a plurality of notches 7a are formed on the larger outer diameter side of the collar 7, the notches 7a are distributed along the circumferential direction of the collar 7, resilient locking flaps 7b are formed on the collar 7 between two adjacent notches 7a, and the locking flaps 7b are locked in the annular relief groove 1 d. The port part of the smaller outer diameter side of the clamping ring 7 is fixedly connected with a propping piece 8, and the second sealing ring 6 is propped against the ball core 2 and the propping piece 8 respectively to form sealing. In the present embodiment, the side of the abutting sheet 8 facing the second sealing ring 6 is provided with a convex ring 8a, and the convex ring 8a is embedded into the inner side of the second sealing ring 6 and forms a seal with the contact. The outer diameter of the convex ring 8a is gradually reduced from the direction of the second sealing ring 6. The clamping ring 7 and the abutting sheet 8 are of an integrated structure and are formed by cutting and folding a stainless steel sheet.

Further, as shown in fig. 1, fig. 2 and fig. 4, the loose joint ball valve further includes a water outlet joint 9, the water outlet joint 9 is sequentially placed into the third portion 1a3 through the first portion 1a1 and the second portion 1a2, an annular retaining shoulder 1a31 is disposed at a mouth portion of the third portion 1a3 away from the second portion 1a2, one end of the water outlet joint 9 protrudes out from a center of the annular retaining shoulder 1a31, the sealing member 5 partially shields the mouth portion of the third portion 1a3 close to the second portion 1a2, the water outlet joint 9 includes a sealing section 9a axially limited between the sealing member 5 and the annular retaining shoulder 1a31 and an external section 9b protruding out from a center of the annular retaining shoulder 1a31, a distance between the sealing member 5 and the annular retaining shoulder 1a31 is slightly greater than a length of the sealing section 9a, and a sealing ring three 10 is disposed on an outer periphery of the sealing section 9 a. The outer wall of the sealing section 9a and the outer wall of the external section 9b are connected to form a step 9c which can be matched with the annular retaining shoulder 1a31, and the periphery of the external section 9b is provided with a plurality of convex rings 9b1 along the axial direction.

Specifically, as shown in fig. 2, the sealing element 5 includes a sealing ring-5 aa and a gasket 5b, the gasket 5b abuts against the annular abutting surface 1c, the sealing ring-5 aa abuts against the core 2 and the gasket 5b respectively to form a seal, and the inner diameter of the gasket 5b is smaller than the outer diameter of the sealing section 9 a. In the present embodiment, the gasket 5b is made of a metal material, and a hard seal is formed between the gasket 5b and the annular abutting surface 1 c.

Specifically, during assembly, the water outlet joint 9, the gasket 5b, the first seal ring 5a, the ball core 2 and the second seal ring 6 are sequentially placed into the flow channel 1a from the opening of the first part 1a1, wherein the water outlet joint 9 is placed into the third part 1a3 to enable one end of the water outlet joint to penetrate out of the valve body 1 from the center of the annular retaining shoulder 1a31, the gasket 5b abuts against the abutting surface 1c, one side of the ball core 2 presses the first seal ring 5a against the gasket 5b, and the second seal ring 6 abuts against the other side of the ball core 2. And finally, the clamping ring 7 is plugged into the flow channel 1a, each clamping flap 7b on the larger outer diameter side of the clamping ring 7 is firstly extruded and retracted inwards on the inner wall of the flow channel 1a, so that the clamping ring 7 can enter the flow channel 1a, until each clamping flap 7b is reset outwards under the action of self elasticity and clamped into the annular abdicating groove 1d, the clamping ring 7 is fixed in the flow channel 1a, and meanwhile, the abutting piece 8 connected to the clamping ring 7 abuts against the second sealing ring 6 to form sealing. After the assembly is completed, the water outlet joint 9 can rotate 360 degrees around the axis of the water outlet joint relative to the valve body 1, so that the active connection between the pipe connected with the water outlet joint 9 and the valve body 1 is realized, and the loosening or leakage caused by the torsion and the like when the water outlet joint is limited by space or used is avoided.

Example two

The structure and principle of this embodiment are basically the same as those of the first embodiment, except that: in this embodiment, the sealing member 5 includes an annular sealing seat, the annular sealing seat abuts against the annular abutting surface 1c, the ball core 2 abuts against the annular sealing seat to form a seal, and the inner diameter of the annular sealing seat is smaller than the outer diameter of the sealing section 9 a.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.