阅读说明：本技术 一种dbb、dib功能互换的球阀 (Ball valve with DBB and DIB functions exchanged ) 是由 吴程杰 孙曾兴 张慧乐 焦伦龄 何永泉 于 2020-04-30 设计创作，主要内容包括：本发明公开了一种DBB、DIB功能互换的球阀,包括阀体、球体,阀体位于球体相对的两侧分别设有上游安装槽与下游安装槽,上游安装槽内设有上游阀座、下游安装槽内设有下游阀座,上游安装槽与上游阀座之间形成一用于驱动上游阀座朝向球体移动的上游密闭驱动腔,上游密闭驱动腔与中腔之间连接有第一传输管道,第一传输管道上设有第一截止阀与第一泄放阀；下游安装槽与下游阀座之间形成一用于驱动下游阀座朝向球体移动的下游密闭驱动腔,下游密闭驱动腔与中腔之间连接有第二传输管道,第二传输管道上设有第二截止阀与第二泄放阀。本发明具有以下优点和效果：本发明具有DBB阀门与DIB阀门的各自优点,从而用于满足实际工况中的使用需求。(The invention discloses a ball valve with DBB and DIB functions exchanged, which comprises a valve body and a ball body, wherein the valve body is provided with an upstream installation groove and a downstream installation groove at two opposite sides of the ball body respectively; a downstream closed driving cavity used for driving the downstream valve seat to move towards the ball body is formed between the downstream mounting groove and the downstream valve seat, a second transmission pipeline is connected between the downstream closed driving cavity and the middle cavity, and a second stop valve and a second relief valve are arranged on the second transmission pipeline. The invention has the following advantages and effects: the invention has the advantages of the DBB valve and the DIB valve, thereby meeting the use requirements in actual working conditions.)

1. The utility model provides a ball valve that DBB, DIB function exchanged, includes valve body (1) and sets up in the runner of valve body (1), install on valve body (1) and wear to establish into inside valve rod (2) of valve body (1), valve rod (2) are located the inside one end of valve body (1) and are equipped with spheroid (3), it is equipped with upstream mounting groove (4) and low reaches mounting groove (5) respectively to be located spheroid (3) relative both sides in valve body (1), be equipped with in upstream mounting groove (4) upstream disk seat (6) of cooperation spheroid (3), be equipped with in low reaches mounting groove (5) downstream disk seat (7) of cooperation spheroid (3), upstream disk seat (6) and low reaches disk seat (7) separate the runner into and are located middle chamber (8) between upstream disk seat (6) and low reaches disk seat (7) between the two, are located upstream disk seat (6) and low reaches chamber (9) that middle chamber (8) one side is dorsad and be located low reaches disk seat (7) one side of low reaches chamber ( (10) The method is characterized in that: the upstream valve seat (6) is arranged in the upstream mounting groove (4) in a reciprocating sealing sliding manner towards the ball body (3), an upstream sealed driving cavity (11) used for driving the upstream valve seat (6) to move towards the ball body (3) is formed between the upstream mounting groove (4) and the upstream valve seat (6), a first transmission pipeline (12) is connected between the upstream sealed driving cavity (11) and the middle cavity (8), and a first stop valve (13) and a first discharge valve (14) are arranged on the first transmission pipeline (12); the downstream valve seat (7) is arranged in the downstream mounting groove (5) towards the sphere (3) in a reciprocating sealing sliding mode, a downstream sealed driving cavity (15) used for driving the downstream valve seat (7) to move towards the sphere (3) is formed between the downstream mounting groove (5) and the downstream valve seat (7), a second transmission pipeline (16) is connected between the downstream sealed driving cavity (15) and the middle cavity (8), and a second stop valve (17) and a second discharge valve (18) are arranged on the second transmission pipeline (16).

2. The ball valve with DBB and DIB functions interchanged according to claim 1, wherein: a first spring (19) for driving the upstream valve seat (6) to move towards the ball body (3) is arranged between the upstream valve seat (6) and the upstream mounting groove (4), and a second spring (20) for driving the downstream valve seat (7) to move towards the ball body (3) is arranged between the downstream valve seat (7) and the downstream mounting groove (5).

3. The ball valve with DBB and DIB functions interchanged according to claim 2, wherein: the first spring (19) is positioned between the upstream closed driving cavity (11) and the middle cavity (8), and the second spring (20) is positioned between the downstream closed driving cavity (15) and the middle cavity (8).

4. The ball valve with DBB and DIB functions interchanged according to claim 1, wherein: the sealing device is characterized in that a first left sealing ring (21) is arranged between the upstream valve seat (6) and the upstream mounting groove (4) and between the upstream cavity (9) and the upstream sealed driving cavity (11), and a first right sealing ring (22) is arranged between the upstream valve seat (6) and the upstream mounting groove (4) and between the middle cavity (8) and the upstream sealed driving cavity (11).

5. The ball valve with DBB and DIB functions interchanged according to claim 1, wherein: and a second right sealing ring (23) is arranged between the downstream valve seat (7) and the downstream mounting groove (5) and between the downstream cavity (10) and the downstream sealed driving cavity (15), and a second left sealing ring (24) is arranged between the downstream valve seat (7) and the downstream mounting groove (5) and between the middle cavity (8) and the downstream sealed driving cavity (15).

6. The ball valve with DBB and DIB functions interchanged according to claim 1, wherein: the first discharge valve (14) is arranged at a position, between the upstream closed driving cavity (11) and the first stop valve (13), of the first transmission pipeline (12), and the second discharge valve (18) is arranged at a position, between the downstream closed driving cavity (15) and the second stop valve (17), of the second transmission pipeline (16).

7. The ball valve with DBB and DIB functions interchanged according to claim 6, wherein: the first transmission pipeline (12) is positioned between the first stop valve (13) and the middle cavity (8) and communicated with the second transmission pipeline (16) positioned between the second stop valve (17) and the middle cavity (8).

8. The ball valve with DBB and DIB functions interchanged according to claim 1, wherein: and the upstream valve seat (6) and the downstream valve seat (7) are respectively provided with a main sealing ring (25) which is matched with the ball body (3) to form sealing.

Technical Field

The invention relates to a valve, in particular to a ball valve with DBB and DIB functions interchangeable.

Background

In oil refining, chemical industry, in order to guarantee that the raw materials is not leaked, put in the volume accurate, require very high to the sealing performance of valve, in order to prevent that valve seal function from becoming invalid, often need have multiple guarantee, guarantee under the condition that a sealed became invalid, reserve sealed also can play sealed effect, and the failure of valve seal function mostly takes place to damage for the disk seat. Therefore, at the beginning of the construction of the pipeline, it is necessary to specify the medium used in the pipeline, and different media require different valves for safety reasons.

In order to prevent the emergency situation of valve seat damage in the market, most of DBB valves are adopted to operate simultaneously, and when one valve fails, the other valve can be sealed continuously. There are also DIB valves that work continuously to seal the downstream seat when the upstream seat fails. However, when a plurality of DBB valves are used, extra cost is generated, which causes waste. And if adopt the DIB valve, because DIB valve intermediate chamber pressure can't be released, have the danger that a lot of mediums that are heated and easily expand are detained in the intermediate chamber and can take place the accident. Aiming at the defects existing in the prior valve, the invention is inoculated.

Disclosure of Invention

The invention aims to provide a ball valve with DBB and DIB functions interchanged, which has the advantages of a DBB valve and a DIB valve respectively, so that the ball valve can meet the use requirements in actual working conditions.

The technical purpose of the invention is realized by the following technical scheme: a ball valve with DBB and DIB functions exchanged comprises a valve body and a flow channel arranged on the valve body, wherein a valve rod penetrating into the valve body is installed on the valve body, a ball body is arranged at one end, located inside the valve body, of the valve rod, an upstream installation groove and a downstream installation groove are respectively arranged on two opposite sides of the ball body in the valve body, an upstream valve seat matched with the ball body is arranged in the upstream installation groove, a downstream valve seat matched with the ball body is arranged in the downstream installation groove, the flow channel is divided into a middle cavity located between the upstream valve seat and the downstream valve seat by the upstream valve seat and the downstream valve seat, an upstream cavity located on one side, back to the middle cavity, of the upstream valve seat and a downstream cavity located on one side, back to the middle cavity, of the downstream valve seat, the upstream valve seat is arranged in the upstream installation groove in a reciprocating sealing sliding mode, a first transmission pipeline is connected between the upstream closed driving cavity and the middle cavity, and a first stop valve and a first discharge valve are arranged on the first transmission pipeline; the downstream valve seat is arranged in the downstream mounting groove in a reciprocating sealing sliding mode towards the ball body, a downstream sealing driving cavity used for driving the downstream valve seat to move towards the ball body is formed between the downstream mounting groove and the downstream valve seat, a second transmission pipeline is connected between the downstream sealing driving cavity and the middle cavity, and a second stop valve and a second discharge valve are arranged on the second transmission pipeline.

By adopting the technical scheme, the valve can be used as a DBB valve to work in a conventional way and is sealed in a one-way by an upstream valve seat; in an emergency situation, for example, when the upstream valve seat fails, the second stop valve is opened, the downstream valve seat is changed into a DIB valve seat, bidirectional sealing can be achieved, and emergency sealing is completed. The valve can also be used as a DIB valve in a conventional way, and under special conditions, such as abnormal pressure of the middle cavity, the DIB valve seat is changed into a DBB valve seat in an emergency, so that the pressure relief of the middle cavity is realized, and the dangerous case is relieved. This application can regard as single DBB valve to use and be used for realizing double sealing, when one side disk seat takes place to leak, can let another disk seat realize promptly sealed, can practice thrift the cost of another valve like this. When the valve is used as a DBB valve, the two valve seats can intercept media in the same direction, double insurance is achieved, and the safety factor of a pipeline is improved. When the valve is used as a DIB valve, when the pressure of the middle cavity rises and cannot be automatically released, the pressure accumulated in the middle cavity can be released through the first release valve or the second release valve, and the risk can be quickly relieved. This application has the multifunctionality, and pipeline and technology can be changed at any time, and the valve can carry out the function conversion rapidly.

Further setting the following steps: and a first spring for driving the upstream valve seat to move towards the ball body is arranged between the upstream valve seat and the upstream mounting groove, and a second spring for driving the downstream valve seat to move towards the ball body is arranged between the downstream valve seat and the downstream mounting groove.

Through adopting above-mentioned technical scheme, the setting up of first spring and second spring can be better drive upstream valve seat and low reaches valve seat towards the spheroid removal for promote the precision of valve and reach better sealed effect.

Further setting the following steps: the first spring is positioned between the upstream closed driving cavity and the middle cavity, and the second spring is positioned between the downstream closed driving cavity and the middle cavity.

Through adopting above-mentioned technical scheme, this kind of setting makes the first spring and the second spring that exist can not receive the airtight drive chamber of upper reaches and the airtight drive chamber's of low reaches influence, ensures the stability of valve operation.

Further setting the following steps: the position between the upstream valve seat and the upstream mounting groove, which is located between the upstream cavity and the upstream sealed driving cavity, is provided with a first left sealing ring, and the position between the upstream valve seat and the upstream mounting groove, which is located between the middle cavity and the upstream sealed driving cavity, is provided with a first right sealing ring.

Through adopting above-mentioned technical scheme, the leakproofness in the airtight drive chamber of upper reaches is guaranteed in the cooperation of first left sealing washer and first right sealing washer for the airtight drive chamber of upper reaches can realize stable drive to the upper reaches disk seat.

Further setting the following steps: and a second right sealing ring is arranged at a position between the downstream valve seat and the downstream mounting groove and between the downstream cavity and the downstream sealed driving cavity, and a second left sealing ring is arranged at a position between the downstream valve seat and the downstream mounting groove and between the middle cavity and the downstream sealed driving cavity.

Through adopting above-mentioned technical scheme, the leakproofness in the airtight drive chamber of low reaches is guaranteed in the cooperation of second left sealing washer and second right sealing washer for the airtight drive chamber of low reaches can realize stable drive to the low reaches disk seat.

Further setting the following steps: the first relief valve is arranged at a position, between the upstream closed driving cavity and the first stop valve, of the first transmission pipeline, and the second relief valve is arranged at a position, between the downstream closed driving cavity and the second stop valve, of the second transmission pipeline.

Through adopting above-mentioned technical scheme, this kind of setting makes first bleeder valve and second bleeder valve can realize independent control and do not receive first stop valve and second stop valve influence to the airtight drive chamber of upper reaches and the airtight drive chamber of low reaches, makes the operation more convenient.

Further setting the following steps: the first transmission pipeline is positioned between the first stop valve and the middle cavity and communicated with the second transmission pipeline positioned between the second stop valve and the middle cavity.

By adopting the technical scheme, the communication between the upstream closed driving cavity and the downstream closed driving cavity is better realized by the communicated arrangement, so that the operation is more convenient and faster, and better control can be realized in the flowing direction.

Further setting the following steps: and the upstream valve seat and the downstream valve seat are respectively provided with a main sealing ring matched with the ball body to form sealing.

Through adopting above-mentioned technical scheme, soft seal is realized to setting up of main seal circle to reach better sealed effect.

In conclusion, the invention has the following beneficial effects: the invention has the advantages of the DBB valve and the DIB valve, thereby meeting the use requirements in actual working conditions.

Drawings

FIG. 1 is a sectional view of the embodiment;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is an enlarged view of a portion B in fig. 1.

In the figure: 1. a valve body; 2. a valve stem; 3. a sphere; 4. an upstream mounting groove; 5. a downstream mounting groove; 6. an upstream valve seat; 7. a downstream valve seat; 8. a middle cavity; 9. an upstream chamber; 10. a downstream chamber; 11. an upstream enclosed drive chamber; 12. a first transfer conduit; 13. a first shut-off valve; 14. a first bleed valve; 15. a downstream enclosed drive chamber; 16. a second transport pipe; 17. a second stop valve; 18. a second bleed valve; 19. a first spring; 20. a second spring; 21. a first left seal ring; 22. a first right seal ring; 23. a second right seal ring; 24. a second left seal ring; 25. and a main sealing ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 to 3, a ball valve that DBB, DIB function exchanged, include valve body 1 and set up in the runner of valve body 1, install on the valve body 1 and wear to establish into the inside valve rod 2 of valve body 1, spheroid 3 is installed to the inside one end that valve rod 2 is located valve body 1, be located the relative both sides of spheroid 3 in the valve body 1 and seted up upstream mounting groove 4 and low reaches mounting groove 5 respectively, be equipped with the upstream disk seat 6 of cooperation spheroid 3 in the upstream mounting groove 4, be equipped with the downstream disk seat 7 of cooperation spheroid 3 in the low reaches mounting groove 5. The upstream valve seat 6 and the downstream valve seat 7 are both fixedly provided with a main sealing ring 25 which is matched with the ball body 3 to form sealing; the upstream and downstream valve seats 6, 7 divide the flow path into a middle chamber 8 between the upstream and downstream valve seats 6, 7, an upstream chamber 9 on the side of the upstream valve seat 6 facing away from the middle chamber 8, and a downstream chamber 10 on the side of the downstream valve seat 7 facing away from the middle chamber 8.

The upstream valve seat 6 is arranged in the upstream mounting groove 4 in a reciprocating sealing sliding manner towards the ball 3, and an upstream sealing driving cavity 11 for driving the upstream valve seat 6 to move towards the ball 3 is formed between the upstream mounting groove 4 and the upstream valve seat 6. A first left sealing ring 21 is arranged between the upstream valve seat 6 and the upstream mounting groove 4 and between the upstream cavity 9 and the upstream closed driving cavity 11; a first right sealing ring 22 is arranged between the upstream valve seat 6 and the upstream mounting groove 4 and between the middle cavity 8 and the upstream sealed driving cavity 11. A first spring 19 for driving the upstream valve seat 6 to move towards the ball 3 is arranged between the upstream valve seat 6 and the upstream mounting groove 4, and the first spring 19 is positioned between the upstream sealing driving cavity 11 and the middle cavity 8.

The downstream valve seat 7 is arranged on the downstream mounting groove 5 in a reciprocating sealing sliding manner towards the ball 3, and a downstream sealed driving cavity 15 for driving the downstream valve seat 7 to move towards the ball 3 is formed between the downstream mounting groove 5 and the downstream valve seat 7. A second right sealing ring 23 is arranged between the downstream valve seat 7 and the downstream mounting groove 5 and between the downstream cavity 10 and the downstream closed driving cavity 15; a second left sealing ring 24 is arranged between the downstream valve seat 7 and the downstream mounting groove 5 and between the middle cavity 8 and the downstream closed driving cavity 15. A second spring 20 for driving the downstream valve seat 7 to move towards the ball 3 is arranged between the downstream valve seat 7 and the downstream mounting groove 5, and the second spring 20 is positioned between the downstream closed driving cavity 15 and the middle cavity 8.

A first transmission pipeline 12 positioned on the outer side of the valve body 1 is fixedly connected between the upstream closed driving cavity 11 and the middle cavity 8, and a first stop valve 13 positioned on the outer side of the valve body 1 is installed on the first transmission pipeline 12; a second transmission pipeline 16 outside the valve body 1 is fixedly connected between the downstream closed driving cavity 15 and the middle cavity 8, and a second stop valve 17 outside the valve body 1 is installed on the second transmission pipeline 16. A first bleed valve 14 located outside the valve body 1 is mounted to the first transfer duct 12 at a position between the upstream sealed drive chamber 11 and the first shut-off valve 13. A second bleed valve 18 located outside the valve body 1 is mounted to the second transfer duct 16 at a position between the downstream sealed drive chamber 15 and the second shut-off valve 17. The position of the first transfer duct 12 between the first shut-off valve 13 and the central chamber 8 communicates with the position of the second transfer duct 16 between the second shut-off valve 17 and the central chamber 8.

When the pipeline is working normally and the valve is set to DBB valve:

the shut-off valve and the bleed valve are in a closed position, and when pressure enters the valve from the upstream chamber 9, the back pressure on the side of the downstream valve seat 7 adjacent to the downstream chamber 10 is greater than the front pressure on the side of the downstream valve seat 7 adjacent to the central chamber 8, and the pressure pushes the downstream valve seat 7 against the ball 3 to effect a seal. When the pressure exists in the middle cavity 8, the pressure of the middle cavity 8 is sealed by the pre-tightening force provided by the second spring 20, and when the pressure reaches the pressure relief pressure set by the valve, the pressure pushes the downstream valve seat 7 to compress the second spring 20, so that the downstream valve seat 7 is separated from the surface of the ball body 3, and the pressure relief is realized.

An emergency situation is encountered (i) such as a failure of the upstream valve seat 6. When pressure enters the middle chamber 8, the pressure will push the downstream valve seat 74 to compress the second spring 20, unseating the downstream valve seat 7 from the ball 3, and sealing cannot be achieved. At this time, the second stop valve 17 can be opened, the pressure of the middle chamber 8 enters the downstream closed driving chamber 15 through the second transmission pipeline 16, under the pressure action of the downstream closed driving chamber 15, the back pressure of one side of the downstream valve seat 7 close to the downstream chamber 10 is greater than the front part of one side of the downstream valve seat 7 close to the middle chamber 8, and the pressure pushes the downstream valve seat 7 to close towards the ball 3, so that the downstream valve is tightly attached to the ball 3 to realize emergency sealing.

When an emergency happens, the middle cavity 8 has trapped media, pressure can be relieved through the upstream or downstream valve seat 7, but the upstream or downstream of the connecting pipeline of the connecting valve fails, so that the pressure cannot be relieved into the connecting pipeline, and at the moment, the stop valve at the position opposite to the position where the pressure is required to be relieved is opened, so that the pressure relief function of the valve seat in the corresponding connecting pipeline direction can be closed; or the upstream and downstream connecting pipelines can not be decompressed, and the pressure of the middle cavity 8 can be released only by opening the stop valve and the pressure release valve in any direction at the same time.

When the pipeline is in a normal working state and the valve is set as a DIB valve:

the bleed valve is in a closed position and the shut-off valve is in an open position. When pressure enters the valve from the connecting pipe, the pressure on the back of the side of the downstream valve seat 7 close to the downstream cavity 10 is greater than the pressure on the front of the side of the downstream valve seat 7 close to the middle cavity 8, and the pressure pushes the downstream valve seat 7 to be tightly attached to the ball 3 to realize sealing. When pressure exists in the middle cavity 8, the pressure of the middle cavity 8 enters the downstream closed driving cavity 15 through the second pipeline, the pressure of the back of the downstream valve seat 7 is larger than that of the front of the downstream valve seat 7, and the pressure of the downstream closed driving cavity 15 pushes the downstream valve seat 7 to approach the ball 3, so that the downstream valve seat 7 is close to the ball 3 to realize bidirectional sealing.

When the medium trapped by the middle cavity 8 is heated and expanded in an emergency situation, and the failure pressure of the valve with the automatic relief valve is abnormally increased, under the condition that emergency relief is allowed by pipelines on one side or two sides, the corresponding stop valve is closed to block the pressure connection between the middle cavity 8 and the back of the valve seat, and meanwhile, the corresponding position relief valve is opened, the pressure accumulated on the back of the relief valve seat is released, and the pressure of the middle cavity 8 can push the valve seat to realize pressure relief. When the two sides do not allow the relief, the relief valve can be directly opened to relieve the pressure in the middle relief cavity 8, and when the relief valve is closed again in an emergency, the valve returns to the initial DIB valve state.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.