Internal structure of sliding plate valve for high vacuum

Abstract

The utility model discloses an internal structure of a sliding plate valve for high vacuum, the sliding plate valve is provided with a runner and a sliding plate cavity which are mutually and vertically communicated, the sliding plate valve comprises a sliding plate assembly, two sealing rings and two pairs of valve seats, the sliding plate assembly is provided with an overflowing hole, the sliding plate assembly can operably slide in the sliding plate cavity, and the two sealing rings are arranged in the sliding plate cavity. The two sealing rings are installed on the side walls of the two sides of the sliding plate cavity respectively and make sealing contact with the two sides of the sliding plate assembly respectively. Each sealing ring is arranged around the flow channel, and the two auxiliary valve seats are arranged in the flow channel in a sliding mode. The double-insurance sealing effect is achieved, impurities are ingeniously prevented from entering the sealing face area in the opening process of the valve, the sealing face is effectively prevented from being scratched, and therefore the service life of the valve is prolonged, and the safety of the whole system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of slide valves, in particular to an internal structure of a slide valve for high vacuum. Background Art

[0002] Due to the special structure of the slide valve, it is currently widely used in the fields of petroleum, chemical industry, metallurgy, mining, etc., especially as a special valve for powder conveying, granular material conveying and other solid-liquid mixed material conveying.

[0003] However, when an ordinary slide valve is used in some complex high-vacuum working conditions, the results are not satisfactory, and problems such as slide wear and poor slide sealing are likely to occur, affecting the safety of the vacuum pipeline system and causing certain losses to customers. Summary of the Invention

[0004] Aiming at the above problems existing in the existing slide valve, the present invention aims to provide an internal structure of a slide valve for high vacuum.

[0005] The specific technical solutions are as follows:

[0006] An internal structure of a slide valve for high vacuum, the slide valve has a flow channel and a slide cavity that are perpendicularly connected to each other, including:

[0007] A slide assembly, the slide assembly has a flow-through hole, and the slide assembly can be operably slid in the slide cavity so that the flow-through hole is connected or disconnected from the flow channel;

[0008] Two sealing rings, the two sealing rings are respectively installed on the two side walls of the slide cavity and are respectively in sealing contact with the two sides of the slide assembly; and each sealing ring is arranged around the flow channel;

[0009] Two sub-valve seats, the two sub-valve seats are slidably arranged in the flow channel and are respectively located on the two sides of the slide assembly, and an elastic support assembly is arranged between each sub-valve seat and the flow channel, so that the sub-valve seat is in elastic sealing contact with the slide assembly through the elastic support assembly.

[0010] As a further improvement and optimization of this solution, the slide assembly includes:

[0011] Two sealing plates, the two sealing plates are arranged opposite to each other and are elastically connected by an elastic component;

[0012] A driving plate, one end of the driving plate is slidably installed between the two sealing plates;

[0013] At least one positioning bead, at least one positioning groove is provided on the opposite end faces of the two sealing plates, the positioning bead is installed on the driving plate and is positioned in the two positioning grooves.

[0014] As a further improvement and optimization of this solution, the elastic component includes a number of elastic members, and each elastic member includes:

[0015] A connecting screw, the tail of the connecting screw slides through the two sealing plates;

[0016] A connecting nut, the connecting nut is threadedly installed at the tail of the connecting screw, and compression springs are provided between the connecting nut and one of the sealing plates and between the head of the connecting screw and the other sealing plate, and both compression springs are sleeved outside the connecting screw.

[0017] As a further improvement and optimization of this solution, screw slots are provided on the mutually facing sides of the two sealing plates, and the two ends of the connecting screw are respectively located in the two screw slots.

[0018] As a further improvement and optimization of this solution, the driving plate has a number of sliding holes, and a number of the connecting screws respectively slide through a number of the sliding holes and respectively form a longitudinal sliding fit with the a number of the sliding holes.

[0019] As a further improvement and optimization of this solution, the bottoms of the two sealing plates are provided with a number of first rollers, and both sides are provided with a number of second rollers, and the axial directions of the a number of first rollers are arranged along the axial direction of the flow channel, and the a number of second rollers are in contact with the side walls of the slide plate cavity.

[0020] As a further improvement and optimization of this solution, an installation chute is provided in the flow channel along the radial direction, and the two sub-valve seats are slidably installed in the installation chute;

[0021] Each elastic support component includes:

[0022] A valve seat support ring, the valve seat support ring is slidably arranged in the installation chute;

[0023] A number of support springs, a number of the support springs are arranged between the valve seat support ring and the side wall of the installation chute.

[0024] As a further improvement and optimization of this solution, a first positioning ring groove is provided in a ring shape on the side of the valve seat support ring facing away from the sub-valve seat, a second positioning ring groove is provided in a ring shape on the side wall of the installation chute, and one end of a number of the support springs abuts against the bottom of the first positioning ring groove and the other end abuts against the bottom of the second positioning ring groove.

[0025] As a further improvement and optimization of this solution, a number of the support springs are arranged at equal intervals along the circumferential direction of the valve seat support ring.

[0026] The positive effects of the above technical solution compared with the prior art are:

[0027] (1) The present invention adopts a double sealing design combining an auxiliary valve seat and a main sealing ring to ensure excellent sealing performance of the valve in the closed state. The two auxiliary valve seats are respectively kept in close contact with the slide assembly through a precise elastic support assembly, which not only achieves a double insurance sealing effect, but also cleverly blocks impurities from entering the sealing surface area during the valve opening process, effectively preventing scratches on the sealing surface, thereby extending the service life of the valve and improving the safety of the overall system.

[0028] (2) In the process of closing the valve, the actuator of this embodiment accurately controls the driving plate to move downward, and the two sealing plates are linked to synchronously descend until they are limited by the bottom of the slide cavity. At this time, the flow hole and the flow channel are misaligned, and the two sealing plates tightly block the flow channel to effectively block the fluid. Subsequently, the actuator continues to apply force to push the driving plate further downward. This action not only pushes the positioning bead out of the positioning groove, but also causes the two sealing plates to expand to both sides, tightly fitting the sealing ring and the auxiliary valve seat, thereby achieving a tighter sealing effect and significantly improving the sealing performance of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the internal structure of a slide valve for high vacuum in the utility model;

[0030] Figure 2 This is a structural schematic diagram of a slide plate assembly for the internal structure of a high vacuum slide plate valve according to the utility model;

[0031] Figure 3 It is an AA cross-sectional view of a slide plate assembly of the internal structure of a slide plate valve for high vacuum of the utility model;

[0032] Figure 4 This is a BB cross-sectional view of a slide plate assembly of the internal structure of a slide plate valve for high vacuum according to the utility model;

[0033] Figure 5 This is a schematic structural diagram of an elastic component of the internal structure of a high vacuum slide valve of the utility model;

[0034] In the accompanying drawings: 1. slide valve; 3. sealing ring; 4. slide assembly; 5. elastic support assembly; 11. flow channel; 12. slide cavity; 13. mounting slide groove; 41. flow hole; 42. second roller; 43. sealing plate; 44. drive plate; 45. first roller; 46. positioning bead; 47. elastic member; 51. auxiliary valve seat; 52. valve seat support ring; 53. support spring; 431. screw groove; 432. positioning groove; 441. slide hole; 471. connecting screw; 472. connecting nut; 473. compression spring. DETAILED DESCRIPTION

[0035] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0036] In the description of the present utility model, it should be noted that terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation of the present utility model. In addition, terms such as "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0038] Figure 1 It is a schematic structural diagram of the internal structure of a slide valve for high vacuum of the present utility model. Figure 2 It is a schematic structural diagram of the slide plate assembly of the internal structure of a slide valve for high vacuum of the present utility model. Figure 3 It is a sectional view taken along line A-A of the slide plate assembly of the internal structure of a slide valve for high vacuum of the present utility model. Figure 4 It is a sectional view taken along line B-B of the slide plate assembly of the internal structure of a slide valve for high vacuum of the present utility model. Figure 5 It is a schematic structural diagram of the elastic member of the internal structure of a slide valve for high vacuum of the present utility model, as Figures 1-5As shown in the figure, the internal structure of a slide valve for high vacuum in a preferred embodiment is shown. The slide valve 1 has a flow channel 11 and a slide plate cavity 12 that are vertically connected to each other, and includes: a slide plate assembly 4, two sealing rings 3, and two auxiliary valve seats 51. The slide plate assembly 4 has a flow-through hole 41. The slide plate assembly 4 can be operably slid within the slide plate cavity 12 to connect or disconnect the flow-through hole 41 from the flow channel 11. The two sealing rings 3 are respectively installed on the two side walls of the slide plate cavity 12 and are respectively in sealing contact with the two sides of the slide plate assembly 4; and each sealing ring 3 is arranged around the flow channel 11. The two auxiliary valve seats 51 are slidably arranged within the flow channel 11 and are respectively located on the two sides of the slide plate assembly 4. An elastic support assembly 5 is provided between each auxiliary valve seat 51 and the flow channel 11, so that the auxiliary valve seat 51 is in elastic sealing contact with the slide plate assembly 4 through the elastic support assembly 5.

[0039] In this embodiment, the actuator is used to drive the slide plate assembly 4 to slide within the slide plate cavity 12. When the valve is opened, the flow channel 11 is connected to the flow-through hole 41. When the valve is closed, the flow channel 11 is misaligned with the filter hole, so that the slide plate assembly 4 blocks the flow channel 11.

[0040] In this embodiment, by adopting a double-sealing design combining the auxiliary valve seat 51 and the main sealing ring 3, the excellent sealing performance of the valve in the closed state is ensured. The two auxiliary valve seats 51 are each continuously pressed against the slide plate assembly 4 through precise elastic support assemblies 5, which not only achieves a double-insurance sealing effect, but also cleverly blocks impurities from entering the sealing surface area during the valve opening process, effectively preventing scratches on the sealing surface, thereby extending the service life of the valve and improving the safety of the overall system.

[0041] More preferably, the main sealing ring 3 is made of fluororubber material to better achieve sealing in high-vacuum working conditions. The auxiliary valve seat 51 is made of PTFE material, which has both good lubrication performance and good sealing performance. Whether the valve is opened or closed, it can better protect the sealing surface area of the slide plate.

[0042] Further, as a preferred embodiment, the slide plate assembly 4 includes two sealing plates 43, a driving plate 44, and at least one positioning bead 46. The two sealing plates 43 are arranged opposite to each other and are elastically connected through an elastic component. One end of the driving plate 44 is slidably installed between the two sealing plates 43. At least one positioning groove 432 is provided on the opposite end faces of the two sealing plates 43. The positioning bead 46 is installed on the driving plate 44 and is positioned within the two positioning grooves 432.

[0043] More preferably, the positioning groove 432 is an arc-shaped groove and matches the circumferential arc surface of the positioning bead 46.

[0044] During the process of closing the valve in this embodiment, the actuator precisely controls the driving plate 44 to move downward, driving the two sealing plates 43 to synchronously descend until they are limited by the bottom of the slide plate cavity 12. At this time, the flow-through holes 41 and the flow channel 11 are misaligned, and the two sealing plates 43 tightly block the flow channel 11, effectively blocking the fluid. Subsequently, the actuator continues to apply force to further press down the driving plate 44. This action not only pushes the positioning beads 46 out of the positioning grooves 432 but also causes the two sealing plates 43 to expand to both sides and closely fit against the sealing ring 3 and the secondary valve seat 51, thereby achieving a more rigorous sealing effect and significantly improving the sealing performance of the valve.

[0045] Further, as a preferred embodiment, the elastic component includes a plurality of elastic members 47. Each elastic member 47 includes a connecting screw 471 and a connecting nut 472. The tail of the connecting screw 471 slides through the two sealing plates 43, and the connecting nut 472 is threadedly installed at the tail of the connecting screw 471. Compression springs 473 are provided between the connecting nut 472 and one of the sealing plates 43 and between the head of the connecting screw 471 and the other sealing plate 43. Both compression springs 473 are sleeved outside the connecting screw 471.

[0046] Further, as a preferred embodiment, screw grooves 43 are provided on the mutually facing sides of the two sealing plates 43. The two ends of the connecting screw 471 are respectively located in the two screw grooves 43, and the elastic members 47 are exposed from the two sealing plates 43 to affect the smooth sliding of the slide plate assembly 4 in the slide plate cavity 12.

[0047] Further, as a preferred embodiment, to improve the installation stability of the driving plate 44, the driving plate 44 has a plurality of sliding holes 441. A plurality of connecting screws 471 respectively slide through the plurality of sliding holes 441 and form a longitudinal sliding fit with the plurality of sliding holes 441 respectively.

[0048] Further, as a preferred embodiment, the bottoms of the two sealing plates 43 are provided with a plurality of first rollers 45, and both sides are provided with a plurality of second rollers 42. The axial directions of the plurality of first rollers 45 are arranged along the axial direction of the flow channel 11, and the plurality of second rollers 42 are in contact with the side walls of the slide plate cavity 12.

[0049] In this embodiment, the bottoms of the two sealing plates 43 are provided with a plurality of first rollers 45, which reduce the friction between the sealing plates 43 and the bottom of the slide plate cavity 12 when the two sealing plates 43 expand to both sides. The bottoms of the two sealing plates 43 are provided with a plurality of second rollers 42, which reduce the friction between the sealing plates 43 and the side walls of the slide plate cavity 12 when the two sealing plates 43 slide downward in the slide plate cavity 12.

[0050] Further, as a preferred embodiment, mounting chutes 13 are provided in the flow channel 11 along the radial direction, and the two secondary valve seats 51 are slidably installed in the mounting chutes 13;

[0051] Each elastic support component 5 includes a valve seat support ring 52 and a plurality of support springs 53. The valve seat support ring 52 is slidably disposed in the installation chute 13, and the plurality of support springs 53 are disposed between the valve seat support ring 52 and the side wall of the installation chute 13.

[0052] Further, as a preferred embodiment, in order to improve the installation stability of the support spring 53, a first positioning ring groove is annularly provided on the side of the valve seat support ring 52 facing away from the auxiliary valve seat 51, and a second positioning ring groove is annularly provided on the side wall of the installation chute 13. One end of the plurality of support springs 53 abuts against the bottom of the first positioning ring groove, and the other end abuts against the bottom of the second positioning ring groove.

[0053] Further, as a preferred embodiment, the plurality of support springs 53 are arranged at equal intervals along the circumferential direction of the valve seat support ring 52, so that the valve seat support ring 52 has a uniform elastic support force on the auxiliary valve seat 51.

[0054] The above are only preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention. For those skilled in the art, it should be realized that the solutions obtained by equivalent replacement and obvious changes made by using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An internal structure of a slide valve for high vacuum, the slide valve having a flow channel and a slide cavity vertically connected to each other, characterized in that: include: A slide plate assembly, wherein the slide plate assembly has a flow hole, and the slide plate assembly can be operably slid in the slide plate cavity to connect or disconnect the flow hole with the flow channel; Two sealing rings, the two sealing rings are respectively installed on the side walls of the slide cavity and are respectively in sealing contact with the two sides of the slide assembly; and each of the sealing rings is arranged around the flow channel; Two auxiliary valve seats are slidably arranged in the flow channel and are respectively located on both sides of the slide assembly. An elastic support assembly is arranged between each auxiliary valve seat and the flow channel, and the auxiliary valve seat is elastically sealed in contact with the slide assembly through the elastic support assembly.

2. The internal structure of the slide valve for high vacuum according to claim 1, characterized in that: The skateboard assembly comprises: Two sealing plates, the two sealing plates are arranged opposite to each other and elastically connected through an elastic component; A driving plate, one end of which is slidably mounted between the two sealing plates; At least one positioning bead, the opposite end surfaces of the two sealing plates are each provided with at least one positioning groove, the positioning bead is installed on the driving plate and positioned in the two positioning grooves.

3. The internal structure of the slide valve for high vacuum according to claim 2, characterized in that: The elastic assembly includes a plurality of elastic components, each of which includes: A connecting screw, the tail of which slides through the two sealing plates; A connecting nut is threadedly mounted on the tail of the connecting screw, and compression springs are arranged between the connecting nut and one of the sealing plates and between the head of the connecting screw and the other sealing plate, and both compression springs are sleeved on the outside of the connecting screw.

4. The internal structure of the slide valve for high vacuum according to claim 3, characterized in that: The two sealing plates are each provided with a screw groove on one side facing away from each other, and the two ends of the connecting screw are respectively located in the two screw grooves.

5. The internal structure of the slide valve for high vacuum according to claim 3, characterized in that: The driving plate is provided with a plurality of sliding holes, and the plurality of connecting screws slide through the plurality of sliding holes respectively and form longitudinal sliding cooperation with the plurality of sliding holes respectively.

6. The internal structure of the slide valve for high vacuum according to claim 2, characterized in that: The bottom of the two sealing plates is provided with a plurality of first rollers, and the two sides are provided with a plurality of second rollers, and the axial directions of the plurality of first rollers are arranged along the axial direction of the flow channel, and the plurality of second rollers are in contact with the side wall of the slide plate cavity.

7. The internal structure of the sliding plate valve for high vacuum according to claim 1, characterized in that: A mounting groove is provided in the flow channel along the radial direction, and the two auxiliary valve seats are slidably mounted in the mounting groove; Each of the elastic support components comprises: A valve seat support ring, the valve seat support ring is slidably arranged in the installation slide groove; A plurality of support springs are arranged between the valve seat support ring and the side wall of the installation slide groove.

8. The internal structure of the sliding plate valve for high vacuum according to claim 7, characterized in that: A first positioning ring groove is arranged on one side of the valve seat support ring away from the auxiliary valve seat, a second positioning ring groove is arranged on the side wall of the mounting slide groove, one end of a plurality of the support springs abuts against the bottom of the first positioning ring groove, and the other end abuts against the bottom of the second positioning ring groove.

9. The internal structure of the slide valve for high vacuum according to claim 8, characterized in that: A plurality of the support springs are arranged at equal intervals along the circumference of the valve seat support ring.

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