Transmission valve and vacuum system

Abstract

The utility model belongs to the technical field of valves, and discloses a transfer valve and a vacuum system, and the transfer valve comprises a valve body, a valve cover, a first sealing piece, a valve plate, a driving piece and a second sealing piece. The gap between the valve body and the valve cover is sealed through the first sealing piece, and the sealing performance of the transmission valve can be improved. And the gap between the shell and the valve cover is sealed through the second sealing piece, the sealing performance of the transmission valve can be further improved, and then the using requirement of a vacuum system is met. Comprising the transmission valve is not prone to leakage, and the working performance is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially, relates to a kind of transmission valve and vacuum system. BACKGROUND

[0002] Transmission valve (also called control valve) is a kind of valve for controlling medium flow, it can adjust the pressure, flow, temperature or liquid level of medium. Among them, the transmission valve used in vacuum system also needs to ensure the sealing and partition of the air pressure between its adjacent two sides, that is, the sealing requirement of the transmission valve used in vacuum system is higher. However, the connecting portion of the existing transmission valve generally adopts the way of close sealing, specifically, the connecting portion of two components is correspondingly pasted tightly, and then is connected into an integrated whole by connecting structure, so that the sealing of transmission valve is poor, and cannot meet the use demand of vacuum system.

[0003] Therefore, the above problems need to be solved. INVENTION CONTENTS

[0004] The utility model aims at providing a kind of transmission valve and vacuum system, to improve the sealing of transmission valve, to meet the use demand of vacuum system.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A kind of transmission valve, comprising:

[0007] Valve body and valve cover, the valve cover is used to close the valve body, the valve body is provided with valve seat in;

[0008] First sealing element, it is set between the valve body and the valve cover, to seal the gap between the two;

[0009] Valve plate, slidingly set in the valve body, and have the closing state of plugging the valve seat and the opening state of opening the valve seat;

[0010] Driving element, including the housing set on the valve cover, the housing is provided with the movement portion capable of sliding and extending the housing;

[0011] The movement portion is connected with the valve plate, to drive the valve plate sliding to switch the valve plate between the closing state and the opening state;

[0012] Second sealing element, it is set between the housing and the valve cover, to seal the gap between the two.

[0013] As preferably, the transmission valve further includes the sealing bellows set on the movement portion, and the two ends of the sealing bellows are connected to the housing and the valve plate respectively.

[0014] Preferably, the valve body is provided with a mounting groove, the valve cover is provided with a matching piece, the first sealing piece is a silver wire embedded in the mounting groove, and the matching piece can be embedded in the mounting groove and abut against the silver wire.

[0015] Preferably, the second sealing piece is an oxygen-free copper sealing ring.

[0016] Preferably, the transmission valve comprises a connecting assembly arranged between the shell and the valve cover, the connecting assembly is configured to press the oxygen-free copper sealing ring between the shell and the valve cover, and deform the oxygen-free copper sealing ring to fill the gap between the shell and the valve cover.

[0017] Preferably, the connecting assembly comprises a knife flange arranged on the shell and a plurality of connecting bolts distributed around the circumferential side of the knife flange and used for fixing the knife flange to the valve cover.

[0018] Preferably, the driving pieces are provided in two, and the two movement parts are respectively connected to the two ends of the same side of the valve plate.

[0019] Preferably, the transmission valve further comprises a control piece, both the driving pieces are electrically connected to the control piece, and the control piece is configured to control the synchronous operation of the two driving pieces.

[0020] Preferably, both the driving pieces are air cylinders, the two air cylinders are connected to the same air path, the control piece is an electromagnetic valve, and the electromagnetic valve is arranged on the air path and used for controlling the opening and closing of the air path.

[0021] A vacuum system comprising a pipeline and the transmission valve described above, and the transmission valve is used for controlling the opening and closing of the pipeline.

[0022] The beneficial effects of the utility model are as follows:

[0023] 1. The gap between the valve body and the valve cover is sealed by the first sealing piece, which can improve the sealing performance of the transmission valve.

[0024] 2. The gap between the shell and the valve cover is sealed by the second sealing piece, which can further improve the sealing performance of the transmission valve, thereby meeting the use requirements of the vacuum system.

[0025] 3. The vacuum system comprising the transmission valve is not prone to leakage and has better working performance. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the explosion view of the transmission valve provided by the utility model;

[0027] Figure 2 is a front view of the transmission valve provided by the utility model;

[0028] Figure 3 is Figure 1 the enlarged view of A in the middle;

[0029] Figure 4 is Figure 2 the sectional view of B-B in the middle;

[0030] Figure 5 is Figure 4 the enlarged view of C in the middle.

[0031] In the figure:

[0032] 1, valve body; 11, valve seat; 12, mounting groove; 2, valve cover; 21, fitting; 3, first sealing element; 4, valve plate; 5, driving element; 51, housing; 52, moving part; 6, second sealing element; 7, control element; 8, sealing bellows; 9, connecting assembly; 91, knife flange; 92, connecting bolt. DETAILED DESCRIPTION

[0033] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described accompanying drawings.

[0034] In this application, the terms "comprise", "comprising", "including", "including", "including" or any other variant thereof are intended to cover non-exclusive inclusions, so that processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed, or include elements inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the statement "comprising a" does not exclude the existence of another identical element in the process, method, article or device including the element.

[0035] In this application, the term "and / or" is a description of the association relationship between the associated objects, which means that there can be three kinds of relationships. For example, a centrifugal vortex magnetic force pump and / or a centrifugal vortex magnetic force pump can mean that there is only one centrifugal vortex magnetic force pump, there is a centrifugal vortex magnetic force pump and a centrifugal vortex magnetic force pump, and there is only one centrifugal vortex magnetic force pump. In addition, the character " / " in this application generally represents that the front and rear associated objects are a "and / or" relationship.

[0036] In this application, the terms "connect", "couple", "coupled", "mount", "mounting" can be direct connection, coupling or mounting, or indirect connection, coupling or mounting. Among them, direct connection refers to the connection of two parts or components without the need for an intermediate part, and indirect connection refers to the connection of two parts or components through at least one intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0037] In this application, those of ordinary skill in the art will understand that the relative terms used in connection with quantities or conditions (for example, "about", "approximately", "substantially" and the like) include the values described and have the meaning indicated by the context. For example, the relative terms at least include the degree of error related to the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. related to a specific value. Such terms should also be considered to disclose the range defined by the absolute values of the two endpoints. The relative terms can refer to the addition or subtraction of a certain percentage (for example, 1%, 5%, 10% or more) of the indicated value. The numerical value without the relative term should also be disclosed as a specific value with a tolerance. In addition, "substantially" when expressing the relative angular positional relationship (for example, substantially parallel, substantially perpendicular), can refer to the addition or subtraction of a certain degree (for example, 1 degree, 5 degrees, 10 degrees or more) based on the indicated angle.

[0038] In this application, those of ordinary skill in the art will understand that the functions performed by the components can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by the parts can also be performed by one part, one component, or multiple parts in combination.

[0039] In this application, the terms "upper", "lower", "left", "right", "front", "back" and the like are described in the orientation and positional relationship shown in the drawings, and should not be understood as limiting the embodiments of the present application. In addition, it should also be understood in the context that when referring to one element connected to another element "on" or "under", it can not only be directly connected to another element "on" or "under", but also indirectly connected to another element "on" or "under" through an intermediate element. It should also be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like not only represent the positive direction, but also can be understood as the side direction. For example, the lower side can include the directly below, the left below, the right below, the front below and the back below, etc.

[0040] Please refer to Figures 1 to 5 The embodiment provides a transmission valve capable of being applied to a vacuum system, which comprises a valve body 1, a valve cover 2, a first sealing element 3, a valve plate 4, a driving element 5 and a second sealing element 6.

[0041] Specifically, the bonnet 2 is used to close the valve body 1, and the valve body 1 is provided with a valve seat 11. The first sealing member 3 is arranged between the valve body 1 and the bonnet 2 to seal the gap therebetween. The valve plate 4 is slidingly arranged in the valve body 1 and has a closed state of blocking the valve seat 11 and an open state of opening the valve seat 11. The driving member 5 includes a housing 51 arranged on the bonnet 2, and the housing 51 is provided with a moving part 52 capable of sliding and extending out of the housing 51. The moving part 52 is connected to the valve plate 4 to drive the valve plate 4 to slide and switch between the closed state and the open state. The second sealing member 6 is arranged between the housing 51 and the bonnet 2 to seal the gap therebetween.

[0042] In this way, the gap between the valve body 1 and the bonnet 2 is sealed by the first sealing member 3, which can improve the sealing performance of the transmission valve. Similarly, the gap between the housing 51 and the valve body 1 is sealed by the second sealing member 6, which can further improve the sealing performance of the transmission valve and meet the use requirements of the vacuum system.

[0043] Generally speaking, if the size of the valve plate 4 is large, the single-point driving is easy to cause stress concentration of the valve plate 4, and the valve plate 4 is prone to deformation after long-term use, which affects the sealing performance of the transmission valve. Therefore, in this embodiment, two driving members 5 are arranged, and the two moving parts 52 are connected to the two ends of the same side of the valve plate 4, respectively, so that the valve plate 4 is driven to move by the two moving parts 52 driving the two ends of the same side of the valve plate 4, respectively, which can reduce or even avoid the deformation of the valve plate 4 caused by stress concentration, thereby helping to ensure the sealing performance of the transmission valve.

[0044] It is worth noting that if the two driving members 5 are controlled separately, it is not easy to ensure the consistency of the movement of the valve rod, and the valve plate 4 is prone to jam during movement. Therefore, to solve this problem, the transmission valve further includes a control member 7, and the two driving members 5 are electrically connected to the control member 7, and the control member 7 is configured to control the two driving members 5 to work synchronously. In this way, the two driving members 5 are controlled to work synchronously by the control member 7, so that the valve plate 4 is more evenly stressed and is not easy to jam, and the work is more stable.

[0045] In the embodiment, the two driving members 5 are identical in structure, and both are air cylinders. The two air cylinders are supplied with air through the same air path. The control member 7 is an electromagnetic valve arranged on the air path and used to control the opening and closing of the air path. It can be understood that the use of one electromagnetic valve to control two air cylinders can simplify the design of the entire pneumatic control system, reduce the workload of wiring and connection, and make the control system more concise and easy to maintain. It should be noted that the use of one electromagnetic valve to control two air cylinders requires that the air pressures required by the two air cylinders be the same. If the air pressures required by the two air cylinders are different, the pressure of one of the air cylinders may change because the air source resource is evenly distributed to the two air cylinders, which may not meet the different air pressure requirements of the two air cylinders.

[0046] In other embodiments, traditional mechanical structures such as gear racks can also be used to simultaneously drive the movement of the two point positions of the valve plate 4.

[0047] To further improve the sealing performance of the transmission valve, the transmission valve further comprises a sealing bellows 8 sleeved on the movement part 52, and the two ends of the sealing bellows 8 are connected to the housing 51 and the valve plate 4, respectively. It can be understood that the sealing bellows 8 can be elastically deformed with the movement of the movement part 52, so that it is always wrapped around the outer periphery of the movement part 52, thereby avoiding leakage between the movement part 52 and the housing 51.

[0048] If the vacuum system is used to transport high-temperature medium, the transmission valve will be in a high-temperature environment for a long time. Correspondingly, the first sealing member 3 and the second sealing member 6 mentioned in the foregoing need to have high-temperature resistance. Therefore, in the embodiment, the valve body 1 is provided with a mounting groove 12, the valve cover 2 is provided with a matching member 21, and the first sealing member 3 is a silver wire embedded in the mounting groove 12. The matching member 21 can be embedded in the mounting groove 12 and abut against the silver wire. It can be understood that the silver wire has certain high-temperature resistance and can be used in a high-temperature environment. In addition, the silver wire exhibits good sealing performance in an ultra-high vacuum environment and is more suitable for use in a vacuum system. It can also be understood that the embedding of the matching member 21 in the mounting groove 12 can make the valve cover 2 and the valve body 1 fit more tightly, and the abutment of the matching member 21 against the silver wire can also increase the deformation amount of the silver wire, thereby improving the sealing performance. In addition, the mounting groove 12 can also prevent the silver wire from sliding during installation, thereby ensuring the installation quality. Of course, in other embodiments, the second sealing member 6 can also be made of other high-temperature resistant materials, such as fluorine rubber, silicone rubber, ceramic, graphite, etc., without limitation.

[0049] In particular, the second sealing member 6 is a copper sealing ring. It can be understood that the copper sealing ring has a high thermal conductivity and a low thermal expansion coefficient, and can quickly conduct heat, and is suitable for sealing under high temperature and high pressure. It can also be understood that the copper sealing ring has excellent sealing performance, which can effectively prevent the leakage of fluids such as gas, liquid and steam, and is particularly suitable for harsh working conditions such as high temperature and high pressure. Of course, in other embodiments, the second sealing member 6 can also be made of other high-temperature-resistant materials, such as fluorine rubber, silicon rubber ceramic, graphite, etc., without limitation.

[0050] Further, the transmission valve includes a connecting assembly 9 arranged between the housing 51 and the valve cover 2, and the connecting assembly 9 is configured to press the copper sealing ring between the housing 51 and the valve cover 2, and to deform the copper sealing ring to fill the gap between the housing 51 and the valve cover 2. It can be understood that the copper sealing ring is deformed by the connecting assembly 9, that is, the excellent plasticity of the copper sealing ring is utilized to make it more fit the sealed parts of the housing 51 and the valve cover 2, so that a better sealing effect can be achieved.

[0051] Specifically, the connecting assembly 9 includes a knife flange 91 and a plurality of connecting bolts 92, the knife flange 91 is arranged on the housing 51, and the plurality of connecting bolts 92 are distributed around the circumferential side of the knife flange 91 and are used to fix the knife flange 91 on the valve cover 2. It can be understood that the copper sealing ring is installed by the knife flange 91, which is simple to operate and suitable for mass production and application.

[0052] Notably, the transmission valve provided in the embodiment selects high-temperature-resistant materials and a reasonable sealing structure design, the two cylinders and the valve cover 2 are sealed by copper, and the valve cover 2 and the valve body 1 are sealed by silver wire. These materials have excellent stability and heat resistance in high-temperature environments. In addition, the moving part 52 of the cylinder with the sealing corrugated pipe 8 penetrates into the valve body 1 through the hole on the valve cover 2, and the housing 51 is fixed by the connecting bolts 92, which ensures the tightness of the structure. The valve plate 4 is driven by the right cylinder and is pressed against the profile of the valve seat 11 to achieve effective sealing. The sealing ring on the valve plate 4 is made of high-temperature-resistant material, which can ensure good sealing at a high temperature of 200°C and prevent leakage. The high-temperature stability of the material and the optimization of the sealing design make the transmission valve able to withstand a high temperature of 200°C in a high-vacuum sealing environment without failure.

[0053] The embodiment further provides a vacuum system including a pipeline and the transmission valve described above, and the transmission valve is used to control the opening and closing of the pipeline. It can be understood that the vacuum system including the transmission valve described above is less likely to leak and has better working performance.

[0054] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claims.

Claims

1. A transfer valve characterized by, The transmission valve comprises: a valve body (1) and a valve cover (2) for closing the valve body (1), the valve body (1) is provided with a valve seat (11) therein; a first sealing member (3) arranged between the valve body (1) and the valve cover (2) to seal the gap therebetween; a valve plate (4) slidingly arranged in the valve body (1) and having a closed state for blocking the valve seat (11) and an open state for opening the valve seat (11); a driving member (5) comprising a housing (51) arranged on the valve cover (2), the housing (51) is provided with a moving part (52) capable of sliding and extending out of the housing (51); the moving part (52) is connected to the valve plate (4) to drive the valve plate (4) to slide and switch between the closed state and the open state; a second sealing member (6) arranged between the housing (51) and the valve cover (2) to seal the gap therebetween.

2. A transfer valve according to claim 1, wherein The transmission valve further comprises a sealing bellows (8) sleeved on the moving part (52), both ends of the sealing bellows (8) are connected to the housing (51) and the valve plate (4) respectively.

3. A transfer valve according to claim 1, wherein The valve body (1) is provided with a mounting groove (12), the valve cover (2) is provided with a matching member (21), the first sealing member (3) is a silver wire embedded in the mounting groove (12), and the matching member (21) can be embedded in the mounting groove (12) and abut against the silver wire.

4. A transfer valve according to claim 1, wherein The second sealing member (6) is an oxygen-free copper sealing ring.

5. A delivery valve according to claim 4, wherein The transmission valve comprises a connecting assembly (9) arranged between the housing (51) and the valve cover (2), the connecting assembly (9) is configured to press the oxygen-free copper sealing ring between the housing (51) and the valve cover (2), and make the oxygen-free copper sealing ring deform to fill the gap between the housing (51) and the valve cover (2).

6. A delivery valve according to claim 5, wherein The connecting assembly (9) comprises a knife flange (91) and a plurality of connecting bolts (92), the knife flange (91) is arranged on the housing (51), and the plurality of connecting bolts (92) are distributed around the circumferential side of the knife flange (91) and used for fixing the knife flange (91) on the valve cover (2).

7. A delivery valve according to claim 1 wherein, The driving member (5) is provided with two, and the two moving parts (52) are respectively connected to the two ends of the same side of the valve plate (4).

8. A delivery valve according to claim 7, wherein, The transmission valve further comprises a control member (7), both the driving members (5) are electrically connected to the control member (7), and the control member (7) is configured to control the synchronous operation of the two driving members (5).

9. A delivery valve according to claim 8, wherein, Both the driving members (5) are air cylinders, both the air cylinders intake air through the same air path, the control member (7) is an electromagnetic valve, and the electromagnetic valve is arranged on the air path and used for controlling the opening and closing of the air path.

10. A vacuum system, characterized by The transmission valve comprises a pipeline and the transmission valve according to any one of claims 1-9, and the transmission valve is used for controlling the opening and closing of the pipeline.

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