Novel vacuum valve

Abstract

The utility model relates to pneumatic control valve technical field especially is involved in a kind of novel vacuum valve, including valve body, drive disc, valve plate, valve plate seat and valve port are equipped in valve body, drive disc is located in the upper portion of valve body, valve plate seat is located in the middle portion of valve body, valve port is located in the lower portion of valve body, one end of valve plate is connected drive disc, and its other end is between valve plate seat and valve port, when drive disc moves back and forth, the other end of valve plate can be moved back and forth between valve plate seat and valve port is driven;Drive disc is located in end cap, valve plate, valve plate seat and valve port are all located in shell, end cap and shell are detachably connected to constitute valve body.The utility model provides a kind of novel vacuum valve, without using rubber diaphragm, improve the service life of vacuum valve.

Description

TECHNICAL FIELD

[0001] The utility model relates to pneumatic valve technical field especially is related to a novel vacuum valve. BACKGROUND

[0002] The vacuum valve on market currently all have drive cavity and valve port generally, be equipped with rubber diaphragm in drive cavity, rubber diaphragm connects valve plate, and the rubber diaphragm is displaced by the deformation caused by the change of drive cavity pressure, thereby driving valve plate to approach or away from valve port, and then achieving the purpose of closing or opening valve. Rubber diaphragm is always deformed and worn, which affects the service life and needs to be replaced frequently. Therefore, the technical personnel in the field actively research and develop to create a kind of pneumatic vacuum valve without setting rubber diaphragm. SUMMARY

[0003] The utility model to solve the technical problem provides a kind of novel vacuum valve, without using rubber diaphragm, improve the service life of vacuum valve.

[0004] The utility model provides a kind of novel vacuum valve, including valve body, the drive disc, valve plate, valve plate seat and valve port are equipped in the valve body, the drive disc is located in the upper portion of valve body, the valve plate seat is located in the middle portion of valve body, the valve port is located in the lower portion of valve body, one end of the valve plate is connected with drive disc, and its other end is located between valve plate seat and valve port, when the drive disc moves back and forth, the other end of valve plate can be moved back and forth between valve plate seat and valve port.

[0005] The drive disc is located in end cap, the valve plate, the valve plate seat and the valve port are all located in the shell, and the end cap and the shell are detachably connected to form the valve body.

[0006] In some embodiments, the inner side wall of the end cap is sealed and connected with the drive disc by a sealing element.

[0007] In some embodiments, a circular inner cylinder is arranged in the end cap, the inner cylinder is sealed and connected with the end cap by a sealing element, and the inner side wall of the inner cylinder is sealed and connected with the drive disc by a sealing element.

[0008] In some embodiments, the sealing element is a sealing ring.

[0009] In some embodiments, a spring is arranged between the drive disc and the end cap.

[0010] In some embodiments, the middle portion of the drive disc is convex to the end cap.

[0011] In some embodiments, the middle portion of the inner top wall of the end cap is convex to the drive disc.

[0012] In some embodiments, a first gas interface for connecting a vacuum source is arranged in the middle of the top wall of the end cover.

[0013] In some embodiments, a second gas interface is arranged on the shell.

[0014] In some embodiments, the inner cylinder is arranged between the top wall of the end cover and the valve plate seat, and the cylinder wall of the inner cylinder is perpendicular to the valve plate seat.

[0015] The utility model discloses the beneficial effects are:

[0016] The utility model discloses the valve body is provided with driving disc, valve plate and so on, and driving disc is under the action of vacuum suction, and the valve plate is moved to open the vacuum valve, need not use rubber diaphragm, improves the service life of vacuum valve. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structure diagram of the embodiment 1 of the utility model Figure One (Closed valve state);

[0018] Figure 2 It is the structure diagram of the embodiment 1 of the utility model Figure Two (Open valve state);

[0019] Figure 3 It is the structure diagram of the embodiment 2 of the utility model Figure One (Closed valve state);

[0020] Figure 4 It is the structure diagram of the embodiment 2 of the utility model Figure Two (Open valve state);

[0021] In the drawing:

[0022] Valve plate 1, driving disc 2, recess 21, valve plate seat 3, valve port 4, end cover 5, shell 6, first sealing ring 7, first gas interface 51, second gas interface 52, spring 8, inner cylinder 9, second sealing ring 10. DETAILED DESCRIPTION

[0023] The technical scheme of the utility model will be described clearly and completely below in conjunction with the drawings, and obviously, the described embodiments are a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0024] Embodiment 1:

[0025] This invention addresses the problem in the market where vacuum valves rely on the deformation of the rubber diaphragm under external force to drive the valve plate movement, resulting in excessive wear of the rubber diaphragm and necessitating frequent replacement of the rubber diaphragm.

[0026] Specifically, such as Figures 1-2 As shown, a novel vacuum valve includes a valve body, which contains a drive disc 2, a valve plate 1, a valve plate seat 3, and a valve port 4. The drive disc is located at the upper part of the valve body, the valve plate seat is located at the middle part of the valve body, and the valve port is located at the lower part of the valve body. One end of the valve plate is connected to the drive disc, and the other end is located between the valve plate seat and the valve port. When the drive disc moves back and forth, it can drive the other end of the valve plate to move back and forth between the valve plate seat and the valve port. The valve body is composed of an end cover 5 and a housing 6. The drive disc is located inside the end cover and can only move along the inner side wall of the end cover. The valve plate, valve plate seat, and valve port are all located inside the housing.

[0027] Under normal conditions, the drive disc is close to the valve plate seat, the valve head of the valve plate is pressed against the valve port, and the valve is in the closed state; the top wall of the end cover is provided with a first gas interface 51 for connecting to a vacuum source. After the first gas interface is connected to the vacuum source, the drive disc moves upward under the vacuum suction force, and at the same time drives the valve plate to move from the valve port to the valve plate seat, thus opening the valve.

[0028] To enable the drive disk to move under vacuum, the inner wall of the end cap must be tightly connected to the drive disk, meaning there must be no airflow between the top and bottom of the drive disk inside the end cap. Therefore, a first sealing ring 7 is provided on the outer peripheral wall of the drive disk. When the drive disk moves upward, it presses the first sealing ring against the inner wall of the end cap. The sealing ring is generally made of rubber, and the slight deformation of the rubber can improve the tightness of the contact point, achieving a sealing effect. Considering the sealing effect, multiple first sealing rings can be provided on the outer peripheral wall of the drive disk. These multiple first sealing rings are spaced apart along the length of the outer peripheral wall (the direction of this length is the direction of the drive disk's displacement). In this embodiment, it is preferable to provide two first sealing rings, which are respectively spaced apart above and below the outer peripheral wall of the drive disk.

[0029] Specifically, the first sealing ring is fitted on the outer peripheral wall of the drive disk, and the outer peripheral wall of the drive disk has a groove 21. The first sealing ring is fitted on the groove on the outer peripheral wall of the drive disk. Half of the first sealing ring is embedded in the groove, and half protrudes out of the groove so as to press against the inner side wall of the end cap and can move along its surface.

[0030] The end cap, drive disc, and sealing ring form a sealed cavity. A second gas interface 52 is provided between the drive disc and the valve plate seat. When the first gas interface on the end cap is connected to vacuum suction, the drive disc can move along the inner wall of the end cap under the action of vacuum suction.

[0031] A spring 8 is arranged between the driving disc and the end cover, and the spring is selected to have sufficient free length and sufficient compression amount; the driving disc is lifted under the action of the vacuum suction force and simultaneously presses the spring, until the spring is maximally compressed; when the vacuum suction force of the first gas interface disappears, the compression force of the spring acts on the driving disc, and the great compression force of the spring will promote the driving disc to move towards the valve seat, the driving disc drives the valve plate to move towards the valve port, and the vacuum valve is closed; when closed, the spring is in a semi-compressed state; in this embodiment, the selection of the spring changes the original vacuum suction of the first gas interface and the second gas interface in turn to simple vacuum suction of only the first gas interface, so as to realize the opening and closing of the valve; this embodiment also has the actuation of opening and closing the vacuum valve, but the overall vacuum gas supply measure can be reduced by half.

[0032] In order to realize the miniaturization of the vacuum valve, in the design, the middle part of the driving disc is protruded towards the end cover, and the valve seat is designed to match the shape of the driving disc; in the limited space, the displacement stroke of the driving disc, i.e. the displacement stroke of the valve plate, is lengthened, so compared with other vacuum valves needing the same displacement stroke, the volume of the end cover can be reduced, and the purpose of reducing the overall volume of the vacuum valve is achieved; in further optimization, the middle part of the inner top wall of the end cover is designed to protrude towards the driving disc, and from the outside, the top part of the end cover is recessed in the middle part, and the first gas interface is arranged at the recessed center, so the length of the end cover (the length is in the direction of the displacement of the driving disc) can be further reduced, and the volume of the vacuum valve can be further reduced.

[0033] In this example, it needs to be explained that when the end cover is demolded from the mold, due to technical reasons, the inner side wall of the end cover is not perpendicular to the inner top wall, but is outwardly inclined to form an obtuse angle, so if the sealing ring is not arranged, the gap between the driving disc and the inner side wall of the end cover will gradually become smaller in the lifting process of the driving disc, the extrusion between the driving disc and the inner side wall of the end cover will become tighter and tighter, until the driving disc cannot be lifted, resulting in failure to open the valve, so the arrangement of the sealing ring not only can realize the sealed connection between the driving disc and the inner side wall of the end cover, but also the slight deformation of the rubber can better adapt to the size change of the gap between the driving disc and the inner side wall of the end cover, and the valve can be smoothly opened.

[0034] In this embodiment, the driving disc can be a rubber disc or a metal disc.

[0035] In this embodiment, the end cover can be made of plastic material or metal material.

[0036] In this embodiment, in order to tightly fit the valve head of the valve plate with the valve port, the valve head is coated with a layer of rubber, and the rubber coating type can adopt full rubber coating of the valve plate body or partial rubber coating of the rubber-embedded part at the joint with the valve port, so the slight deformation of the rubber can improve the tightness of the contact point.

[0037] The working process of this embodiment is as follows:

[0038] Under normal conditions, the drive disc is close to the valve plate seat, the valve head of the valve plate is pressed against the valve port, the valve is in the closed state, and the spring is in a semi-compressed state.

[0039] Open the valve: Connect the first gas port in the middle of the top of the end cap to the vacuum source. The drive plate moves upward under the vacuum suction force, and at the same time, it moves the valve plate from the valve port to the valve plate seat to open the valve.

[0040] Closing the valve: Disconnect the vacuum source from the first gas interface. The huge compressive force of the spring acts on the drive plate. The huge spring compressive force will cause the drive plate to move towards the valve plate seat. The drive plate drives the valve plate to move towards the valve port, closing the vacuum valve.

[0041] Example 2:

[0042] like Figures 3-4 As shown, a novel vacuum valve has a structure that is basically the same as that of Embodiment 1, except that: an inner cylinder 9 is provided inside the end cap, which is closely attached to the inner side wall. The cross-section of the inner cylinder is a circle that is adapted to the shape of the end cap. The inner cylinder is located between the inner top wall of the end cap and the valve plate seat, and the cylinder wall of the inner cylinder is perpendicular to the inner top wall / valve plate seat. The inner cylinder and the end cap are sealed and connected by a second sealing ring 10, and the inner side wall of the inner cylinder is sealed and connected to the drive disc by a first sealing ring 7.

[0043] An inner cylinder perpendicular to the inner top wall of the end cap can eliminate the outward tilting of the inner sidewall caused by demolding. The gap between the drive disc and the inner sidewall of the inner cylinder is of uniform size, and the drive disc moves more smoothly in the inner cylinder.

[0044] The working process of this embodiment is basically the same as that of Embodiment 1, and will not be described again here.

[0045] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of the utility model, it is necessary to explain, unless there is definite stipulation and limitation, the term "installation", "linkage", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication inside two elements.For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.In addition, the technical features involved in the different embodiments of the utility model described below can be combined as long as they do not conflict with each other.

[0047] It should be emphasized that: the above is only the preferred embodiment of the utility model, and does not limit the utility model in any form, and any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model still belongs to the scope of the technical scheme of the utility model.

Claims

1. A new type of vacuum valve, characterized in that, The valve body is provided with a driving disc, a valve plate, a valve plate seat and a valve port, the driving disc is arranged at the upper part of the valve body, the valve plate seat is arranged at the middle part of the valve body, the valve port is arranged at the lower part of the valve body, one end of the valve plate is connected with the driving disc, and the other end of the valve plate is located between the valve plate seat and the valve port, when the driving disc moves back and forth, the other end of the valve plate can move back and forth between the valve plate seat and the valve port. The driving disc is arranged in an end cover, the valve plate, the valve plate seat and the valve port are arranged in a shell, and the end cover and the shell are detachably connected to form the valve body.

2. The new vacuum valve according to claim 1, characterized in that The inner side wall of the end cover is sealingly connected with the driving disc through a sealing element.

3. The new vacuum valve according to claim 1, characterized in that, A circular inner cylinder is arranged in the end cover, the inner cylinder is sealingly connected with the end cover through a sealing element, and the inner side wall of the inner cylinder is sealingly connected with the driving disc through a sealing element.

4. The new vacuum valve according to claim 2 or 3, characterized in that The sealing element is a sealing ring.

5. The novel vacuum valve according to claim 1, characterized in that A spring is arranged between the driving disc and the end cover.

6. The novel vacuum valve according to claim 1, characterized in that The middle part of the driving disc is protruded towards the end cover.

7. The novel vacuum valve according to claim 1, characterized in that The middle part of the inner top wall of the end cover is protruded towards the driving disc.

8. The novel vacuum valve according to claim 1, characterized in that A first gas interface connected with a vacuum source is arranged in the middle part of the top wall of the end cover.

9. The novel vacuum valve according to claim 7, characterized in that A second gas interface is arranged on the shell.

10. The novel vacuum valve as claimed in claim 3, wherein, The inner cylinder is arranged between the top wall of the end cover and the valve plate seat, and the cylinder wall of the inner cylinder is perpendicular to the valve plate seat.

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