CN210118471U - Pressure balance type flip-chip bushing plug valve capable of adjusting sealing specific pressure on line - Google Patents
Pressure balance type flip-chip bushing plug valve capable of adjusting sealing specific pressure on line Download PDFInfo
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- CN210118471U CN210118471U CN201920922954.6U CN201920922954U CN210118471U CN 210118471 U CN210118471 U CN 210118471U CN 201920922954 U CN201920922954 U CN 201920922954U CN 210118471 U CN210118471 U CN 210118471U
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Abstract
The utility model discloses a pressure balance type inverted lining plug valve capable of adjusting sealing specific pressure on line, wherein the interior of the valve body is provided with a plug body with a small upper part and a big lower part, and the plug body and a connecting block are designed in a floating way, so that the plug body can be conveniently dismounted, assembled and debugged through the opening at the lower end of the valve body, and the maintenance is convenient; the floating of the plug body and the valve rod avoids the moment increase phenomenon caused by the non-concentricity of the plug body and the valve rod, and the sealing of the plug body is better realized; the sealing is carried out when the floating is carried out by the matching of the truncated cone shape at the upper end and the lower end of the valve body, the inclined wall of the plug body and the elastic lining, a medium is introduced into the upper grease storage cavity and the lower grease storage cavity through the one-way valve, the trend that the plug body moves towards the valve rod direction is kept by utilizing the pressure difference formed by the pressure of the medium at the different bottom areas of the upper end and the lower end of the plug body, the larger the force of the plug body moving towards the valve rod direction is along with the rising of the pressure of the medium in the pipeline, the specific; on the other hand, the adjusting screw is arranged to adjust the movable position of the plug body, so that the sealing specific pressure can be conveniently adjusted when the pressure is small.
Description
Technical Field
The utility model belongs to the technical field of the valve and specifically relates to a but pressure balance formula flip-chip bush plug valve of online adjustment sealing specific pressure is related to.
Background
The pressure balance type plug valve utilizes medium pressure to act on the upper end surface and the lower end surface of the plug, so that the plug valve is convenient to open and close. However, because the valve rod and the plug body are rigidly connected, if the valve rod and the plug body are not concentric in the using process, the moment is increased, the abrasion of parts in the opening and closing process is increased, and the overall sealing performance is influenced. Then the sealing specific pressure of the existing plug valve is inconvenient to adjust due to the limitation of the structure, or the specific pressure strength is not enough, so that the sealing performance of the plug valve under different pressures is influenced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a but the sealed balanced type flip-chip bush plug valve of specific pressure of on-line adjustment, through the sealed effect of structural improvement reinforcing plug valve, increase of service life.
The utility model provides a following technical scheme: a pressure balance type inverted lining plug valve capable of adjusting sealing specific pressure on line comprises a valve body, a plug body, a lower cover and a valve rod, wherein the plug body is rotatably arranged in a channel of the valve body, the lower end of the plug body is large, the upper end of the plug body is small, a through trapezoidal flow channel is arranged in the middle of the plug body, the plug body is connected with the valve rod at the upper end through a connecting block, the plug body is arranged in the valve body from an opening at the lower end of the valve body and is hermetically arranged in the valve body,
the upper end surface of the plug body is provided with a square groove, the connecting block is provided with a square lug matched with the square groove, and the plug body and the connecting block can swing back and forth and left and right through the matching of the square groove and the square lug;
the upper end and the lower end of the plug body are both in a round table shape, the valve body is provided with an inclined wall corresponding to the round table shape of the plug body, a circle of elastic bushings which are respectively matched and sealed with the upper end and the lower end of the plug body are arranged on the inclined wall, the upper end and the lower end of the plug body are respectively provided with a check valve which is communicated up and down, and the inlet of the check valve is arranged on one side of the flow passage; the upper end of the plug body, the valve body and the valve rod form an upper grease storage cavity, and the lower end of the plug body, the valve body and the lower cover form a lower grease storage cavity;
the lower cover is provided with an adjusting screw, and the adjusting screw adjusts the relative distance between the adjusting screw and the plug body when rotating.
As an improvement, the lower cover has the cylindricality body and sets up the boss in cylindricality body one end, and the boss imbeds the lower extreme opening of valve body and sets up first O type circle at the periphery and install sealedly, and the cylindricality body is installed on the valve body through the fastener and sets up the winding gasket at valve body lower extreme open-ended periphery and carry out the conflict and seal.
As an improvement, the valve rod penetrates through the upper part of the valve body and is provided with a second O-shaped ring for sealing; the valve rod penetrates out of the valve body, a pressing sleeve is installed on the periphery of the opening of the upper portion of the valve rod, and the pressing sleeve is arranged towards the opening of the upper portion of the valve body and is woven with graphite for sealing.
As an improvement, a grease injection mechanism is arranged on the valve rod and is communicated into the valve body 1 through a channel arranged on the valve rod.
As an improvement, the grease injection mechanism is arranged at the upper end of the valve rod and leads into the valve body 1 through a channel arranged axially in the valve rod.
As an improvement, the end part of the adjusting screw is provided with a top block, and the top block extends into the lower grease storage cavity and is abutted against the plug body; and a third O-shaped ring and a filler are arranged in a hole of the lower cover on the periphery of the top block for sealing.
As an improvement, the square groove and the square convex block which are matched with the plug body and the connecting block are arranged into inclined walls or edge chamfers to swing.
The utility model has the advantages that: through the design of the plug body with a small upper part and a large lower part and the floating design of the connecting block and the valve rod, the plug body can be conveniently disassembled, assembled and debugged through the lower end opening of the valve body, the plug body and the valve rod do not need to be integrally disassembled like the prior structure, and the maintenance is convenient; the floating of the plug body and the valve rod avoids the phenomenon of torque increase caused by the fact that the plug body and the valve rod are not concentric, and the sealing of the plug body is better realized; the sealing is carried out when the floating is carried out by the matching of the truncated cone shape at the upper end and the lower end of the valve body, the inclined wall of the plug body and the elastic lining, a medium is introduced into the upper grease storage cavity and the lower grease storage cavity through the one-way valve, the trend that the plug body moves towards the valve rod direction is kept by utilizing the pressure difference formed by the pressure of the medium at the different bottom areas of the upper end and the lower end of the plug body, the larger the force of the plug body moving towards the valve rod direction is along with the rising of the pressure of the medium in the pipeline, the specific; on the other hand, the adjusting screw is arranged to adjust the movable position of the plug body, so that the sealing specific pressure can be conveniently adjusted when the pressure is small.
Drawings
Fig. 1 is a schematic view of the cross-sectional structure of the plug valve of the present invention.
FIG. 2 is an enlarged view of the structure at M in FIG. 1;
fig. 3 is an enlarged schematic view of the structure at N in fig. 1.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
As shown in fig. 1, 2 and 3, a specific embodiment of the pressure balanced type flip-chip bushing plug valve with on-line adjustable sealing specific pressure according to the present invention is provided. The embodiment comprises a valve body 1, a plug body 2, a lower cover 3 and a valve rod 4, wherein the plug body 2 is rotatably arranged in a channel of the valve body 1, the lower end of the plug body 2 is large, the upper end of the plug body 2 is small, a through trapezoidal flow channel 21 is arranged in the middle of the plug body, the plug body 2 is connected with the valve rod 4 at the upper end through a connecting block 5, the plug body 2 is arranged in the valve body 1 from an opening at the lower end of the valve body 1 and is hermetically arranged in the valve body 1 through the,
the upper end surface of the plug body 2 is provided with a square groove 22, the connecting block 5 is provided with a square bump 51 matched with the square groove 22, and the plug body 2 and the connecting block 5 can swing back and forth and left and right through the matching of the square groove 22 and the square bump 51;
the upper end and the lower end of the plug body 2 are both in a round table shape, the valve body 1 and the round table shape of the plug body 2 are correspondingly provided with inclined walls, a circle of elastic bushings 6 which are respectively matched and sealed with the upper end and the lower end of the plug body 2 are arranged on the inclined walls, the upper end and the lower end of the plug body 2 are respectively provided with a check valve 7 which is communicated up and down, and the inlet of the check valve 7 is arranged on one side of a flow channel; the upper end of the plug body 2, the valve body 1 and the valve rod 4 form an upper grease storage cavity, and the lower end of the plug body 2, the valve body 1 and the lower cover 3 form a lower grease storage cavity;
the lower cover 3 is provided with an adjusting screw 8, and the adjusting screw 8 adjusts the relative distance with the plug body 2 when rotating.
The utility model discloses when using, valve rod 4 is worn out and is controlled rotatoryly through actuating mechanism from the upper end opening of valve body 1, and it is rotatory that the cooperation is installed to connecting block 5 and 4 accessible quad slit of valve rod and lug structure, and cock body 2 is packed into from the lower extreme opening of valve body 1, and lower extreme opening lid 3 seals up, and through 2 designs of cock body big end down, cock body 2 can be through the convenient dismouting debugging of 1 lower extreme opening of valve body, is convenient for maintain. The trapezoidal flow passage 21 of the plug body 2 is in parallel communication with or vertically closed off from the lateral flow passage of the valve body 1 when rotated 90 degrees. The medium in the runner gets into through check valve 7 of upper and lower extreme and stores up fat chamber and down, utilizes the pressure differential that medium pressure formed at the different basal areas of the lower extreme on the cock body to make cock body 2 keep the trend of moving to valve rod 4 direction, and along with the rising of pipeline medium pressure, the power that cock body 2 removed to valve rod 4 direction is big more, and automatic reinforcing specific pressure reaches the effect of self sealss. The cock body 2 dress is back in valve body 1, and the sloping wall size looks adaptation of upper and lower end round platform shape and valve body 1, and further sets up elastic bush 6 on the sloping wall, makes cock body 2 peripheral good when relative connecting block 5 floats seal, and the specific pressure is stable to the phenomenon that the moment that causes when the cock body 2 and valve rod 4 decentraction has been avoided in the floating of cock body and valve rod increases, better realization the cock body is sealed. And meanwhile, the adjusting screw 8 is further arranged and can be screwed out on the lower cover 3 to control the tightness of the plug body 2, so that the sealing specific pressure can be adjusted on line in a matching manner in pressure hours, and the plug valve can be flexibly controlled.
As a modified embodiment, the lower cover 3 has a cylindrical body 31 and a boss 32 provided at one end of the cylindrical body 31, the boss 32 is fitted into the lower end opening of the valve body 1 and a first O-ring 33 is provided at the periphery for installation and sealing, and the cylindrical body 31 is installed on the valve body 1 by a fastener and a wound gasket 34 is provided at the periphery of the lower end opening of the valve body 1 for interference sealing.
As shown in fig. 1 and 2, a specific boss 32 of the lower cover 3 is embedded into a lower end opening of the valve body 1 and is mounted and sealed through a first O-ring 33, so that a heavy sealing effect is achieved; and the binding face of the lower end of the cylindrical body 31 and the valve body 1 is provided with a winding gasket 34 for double-abutting sealing, so that the integral sealing effect of the lower cover 3 is improved.
As a modified specific embodiment, the valve rod 4 is arranged on the upper part of the valve body 1 in a penetrating way and is provided with a second O-shaped ring 41 for sealing; after the valve rod 4 penetrates through the valve body 1, a pressing sleeve 42 is installed on the periphery of the upper opening, and the pressing sleeve 42 is provided with woven graphite 43 facing the upper opening of the valve body 1 for sealing.
As shown in fig. 1 and 3, the second O-ring 41 arranged on the valve rod 4 performs sealing to achieve a heavy sealing effect; the upper opening part is provided with the pressure sleeve 42 and locked by a fastener, so that the valve rod 4 is stably installed, the pressure sleeve 42 is provided with the woven graphite 43 for sealing, double sealing is realized, and the integral sealing effect of the valve rod 4 is improved.
As a modified embodiment, a grease injection mechanism 9 is arranged on the valve rod 4, and the grease injection mechanism 9 is communicated into the valve body 1 through a channel arranged on the valve rod 4.
As shown in fig. 1, the grease injection mechanism 9 can be implemented by using the prior art, and when the sealing surfaces of the valve rod 4 and the valve body 1 fail due to mechanical damage, such as particle scratching, the grease injection mechanism 9 can inject sealing grease to realize emergency sealing of the valve rod 4 and the valve body 1, so as to avoid the overall damage of the components.
As a modified embodiment, the grease injection mechanism 9 is arranged at the upper end of the valve rod 4 and opens into the valve body 1 through a passage arranged axially in the valve rod 4.
As shown in fig. 1, the specific setting position of the grease injection mechanism 9 can be set at the upper end of the valve rod 4, and the channel is introduced into the valve body 1 along the axial direction of the valve rod 4, so that the whole structure is more convenient to process; compared with the structure that the grease injection mechanism 9 is arranged on the valve body 1, the structure is lower in manufacturing cost and more compact.
As a modified specific implementation mode, the end part of the adjusting screw 8 is provided with a top block 81, and the top block 81 extends into the lower grease storage cavity to abut against the plug body 2; the periphery of the top block 81 is sealed by a third O-ring 82 and a packing 83 disposed in the hole of the lower cover 3.
As shown in fig. 1 and 2, by the arrangement of the top block 81, the top block 81 can be made of a harder material and used for abutting against the plug body 2, so that the structural strength is enhanced; a third O-shaped ring 82 arranged on the top block 81 is used for sealing, so that a heavy sealing effect is achieved; the packing 83 is provided for sealing to achieve a double sealing effect, and the packing 83 is preferably a plastic sealing packing.
As a modified embodiment, the square groove 22 and the square projection 51 of the plug body 2 and the connecting block 5 are provided with inclined walls or edge chamfers for swinging.
The utility model discloses when using, the unsteady accessible square groove 22 of cock body 2 and connecting block 5 and square convex block 51 set up to skew wall or edge chamfer and realize, and its unsteady range is needn't be too big, can eliminate the condition that causes moment to increase when cock body 2 and valve rod 4 decentraction can, better realization the cock body is sealed.
Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides a but plug valve of pressure balance formula flip-chip bush of online adjustment sealing specific pressure, includes valve body (1), cock body (2), lower cover (3) and valve rod (4), cock body (2) are rotatable to be set up in the passageway of valve body (1), cock body (2) lower extreme is big, and the upper end is little, and the centre is equipped with trapezoidal runner (21) that runs through, cock body (2) are connected with valve rod (4) of upper end through a connecting block (5), cock body (2) are packed into and through lower cover (3) seal mounting in valve body (1) by the lower extreme opening of valve body (1), its characterized in that:
the upper end face of the plug body (2) is provided with a square groove (22), the connecting block (5) is provided with a square lug (51) matched with the square groove (22), and the plug body (2) and the connecting block (5) can swing back and forth and left and right through the matching of the square groove (22) and the square lug (51);
the upper end and the lower end of the plug body (2) are both in a truncated cone shape, the valve body (1) and the truncated cone shape of the plug body (2) are correspondingly provided with inclined walls, a circle of elastic bushings (6) which are respectively matched and sealed with the upper end and the lower end of the plug body (2) are arranged on the inclined walls, the upper end and the lower end of the plug body (2) are respectively provided with a one-way valve (7) which is communicated up and down, and the inlet of the one-way valve (7) is arranged on one side of a flow passage; the upper end of the plug body (2), the valve body (1) and the valve rod (4) form an upper grease storage cavity, and the lower end of the plug body (2), the valve body (1) and the lower cover (3) form a lower grease storage cavity;
and an adjusting screw (8) is arranged on the lower cover (3), and the adjusting screw (8) adjusts the relative distance with the plug body (2) when rotating.
2. The pressure balance type flip-chip bushing plug valve capable of adjusting the sealing specific pressure on line according to claim 1, is characterized in that: the lower cover (3) is provided with a cylindrical body (31) and a boss (32) arranged at one end of the cylindrical body (31), the boss (32) is embedded into a lower end opening of the valve body (1) and is provided with a first O-shaped ring (33) at the periphery for installation and sealing, the cylindrical body (31) is installed on the valve body (1) through a fastener, and a winding gasket (34) is arranged at the periphery of the lower end opening of the valve body (1) for interference and sealing.
3. The pressure balance type flip-chip bushing plug valve capable of adjusting the sealing specific pressure on line according to claim 1, is characterized in that: the valve rod (4) penetrates through the upper part of the valve body (1) and is provided with a second O-shaped ring (41) for sealing; the valve rod (4) penetrates out of the valve body (1) and then is provided with a pressing sleeve (42) at the periphery of an upper opening, and the pressing sleeve (42) is provided with woven graphite (43) facing the upper opening of the valve body (1) for sealing.
4. The pressure balance type flip-chip bushing plug valve capable of adjusting the sealing specific pressure on line according to claim 1, is characterized in that: be provided with on valve rod (4) and annotate fat mechanism (9), annotate fat mechanism (9) and let in valve body (1) through the passageway that sets up on valve rod (4).
5. The pressure balance type flip-chip bushing plug valve capable of adjusting the sealing specific pressure on line according to claim 4, wherein: the grease injection mechanism (9) is arranged at the upper end of the valve rod (4), and a channel axially arranged through the valve rod (4) is introduced into the valve body (1).
6. The pressure balanced flip-chip bushing plug valve capable of on-line adjustment of specific sealing pressure according to any one of claims 1 to 5, wherein: the end part of the adjusting screw (8) is provided with a top block (81), and the top block (81) extends into the lower grease storage cavity to be abutted against the plug body (2); and a third O-shaped ring (82) and a filler (83) are arranged in a hole of the lower cover (3) at the periphery of the top block (81) for sealing.
7. The pressure balanced flip-chip bushing plug valve capable of on-line adjustment of specific sealing pressure according to any one of claims 1 to 5, wherein: the square groove (22) and the square bump (51) which are matched with the plug body (2) and the connecting block (5) are arranged to be inclined walls or edge chamfers to swing.
8. The pressure balance type flip-chip bushing plug valve capable of adjusting the sealing specific pressure on line according to claim 6, wherein: the square groove (22) and the square bump (51) which are matched with the plug body (2) and the connecting block (5) are arranged to be inclined walls or edge chamfers to swing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920922954.6U CN210118471U (en) | 2019-06-19 | 2019-06-19 | Pressure balance type flip-chip bushing plug valve capable of adjusting sealing specific pressure on line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920922954.6U CN210118471U (en) | 2019-06-19 | 2019-06-19 | Pressure balance type flip-chip bushing plug valve capable of adjusting sealing specific pressure on line |
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| Publication Number | Publication Date |
|---|---|
| CN210118471U true CN210118471U (en) | 2020-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920922954.6U Active CN210118471U (en) | 2019-06-19 | 2019-06-19 | Pressure balance type flip-chip bushing plug valve capable of adjusting sealing specific pressure on line |
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| CN (1) | CN210118471U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113389911A (en) * | 2021-06-17 | 2021-09-14 | 浙江福瑞科流控机械有限公司 | High-pressure full-bore forged steel plug valve and working method thereof |
| CN114198521A (en) * | 2021-12-06 | 2022-03-18 | 浙江福瑞科流控机械有限公司 | Pilot self-operated double-blocking-discharge normally-installed bushing plug valve and working method thereof |
-
2019
- 2019-06-19 CN CN201920922954.6U patent/CN210118471U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113389911A (en) * | 2021-06-17 | 2021-09-14 | 浙江福瑞科流控机械有限公司 | High-pressure full-bore forged steel plug valve and working method thereof |
| CN114198521A (en) * | 2021-12-06 | 2022-03-18 | 浙江福瑞科流控机械有限公司 | Pilot self-operated double-blocking-discharge normally-installed bushing plug valve and working method thereof |
| CN114198521B (en) * | 2021-12-06 | 2024-02-06 | 浙江福瑞科流控机械有限公司 | Pilot-operated self-operated double-blocking discharge plug valve with positively-installed bushing and working method thereof |
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