Valve with non-return function

Abstract

The utility model discloses a valve with a non-return function, and belongs to the technical field of valves. The valve comprises a valve body; the valve disc is arranged on the inner side of the valve body, and the valve disc is used for ensuring the non-return effect of the valve body; the two ball valves are symmetrically arranged on the inner side of the valve body and used for controlling flowing of media on the two sides of the valve body, due to the fact that the two ball valves are adopted and used for controlling flowing of the media on the two sides of the interior of the valve body, the media can be prevented from flowing into the valve body by closing the two ball valves in the overhauling process, and the service life of the valve body is prolonged. Therefore, the problems that the valve needs to be detached for maintenance and a large amount of residual media in the pipeline need to be emptied during valve maintenance are effectively solved, and the technical effects that the valve maintenance steps are simplified, and medium waste is reduced are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, and more particularly to a valve with a check function. BACKGROUND

[0002] The valve with a check function is commonly known as a check valve, which is an automatic valve used to prevent fluid from flowing in the opposite direction in the pipeline. Its main function is to allow passage when the fluid flows in the forward direction, and to automatically close when the fluid flows in the reverse direction, thereby avoiding the occurrence of backflow.

[0003] In related technologies, the sealing effect of the check valve is not good. In order to improve the sealing effect of the valve, for example, the prior art with the publication number CN206708464U provides a check valve. The device increases the sealing effect of the reverse flow of the medium by cooperating the second matching boss with the second sealing boss, and prevents the medium from overflowing from the third connecting port by cooperating and connecting the valve body cover with the third connecting port, thereby increasing the sealing effect of the check valve.

[0004] Although the prior art in the above-mentioned technical solutions can increase the sealing effect of the reverse flow of the medium and prevent the medium from overflowing from the third connecting port by setting the second matching boss and the second sealing boss, and the valve body cover and the third connecting port, when the valve is overhauled, the medium input end needs to be closed, and then the valve needs to be disassembled for overhaul. The steps of the overhaul are complex, and after the medium input is stopped, a large amount of medium may remain in the pipeline, which needs to be emptied, resulting in a large amount of waste of medium.

[0005] In view of this, we propose a valve with a check function. CONTENT OF THE UTILITY MODEL

[0006] 1. Technical problem to be solved

[0007] The purpose of the present application is to provide a valve with a check function, which solves the technical problem that the valve needs to be disassembled for overhaul, and a large amount of medium remaining in the pipeline needs to be emptied, thereby simplifying the valve overhaul steps and reducing the waste of medium.

[0008] 2. Technical solution

[0009] The present application provides a valve with a check function, comprising:

[0010] a valve body;

[0011] a valve disc arranged on the inner side of the valve body, the valve disc being used to ensure the check effect of the valve body;

[0012] two ball valves symmetrically arranged on the inner side of the valve body, the two ball valves being used to control the flow of the medium on both sides of the valve body.

[0013] As an optional scheme of the technical scheme of the application file, the top of each of the two ball valves is provided with a rotary switch, and two through openings are formed in the two sides of the top of the valve body corresponding to the two rotary switches.

[0014] As an optional scheme of the technical scheme of the application file, a sealing ring is arranged between each of the two rotary switches and the corresponding through opening, and the two sealing rings are used to ensure the sealing effect of the inner side of the valve body.

[0015] As an optional scheme of the technical scheme of the application file, the valve disc is arranged rotatably on the inner side of the valve body, one side of the valve disc is fixedly provided with a threaded column, an installation rod is sleeved on the outer side of the threaded column, a nut is arranged on the outer side of the installation rod, and the inner side of the nut is threadedly arranged with the inner side of the threaded column.

[0016] As an optional scheme of the technical scheme of the application file, the two sides of the valve body are both provided with a connecting flange, the two connecting flanges are used to connect external pipelines, and a valve body cover is detachably arranged on the top of the valve body.

[0017] As an optional scheme of the technical scheme of the application file, a tapered opening is formed in the bottom of the valve body, and a sealing assembly is arranged on the inner side of the tapered opening, and the sealing assembly is used to seal the tapered opening.

[0018] As an optional scheme of the technical scheme of the application file, the sealing assembly comprises a sealing plug, the outer side of the sealing plug is matched with the inner side of the tapered opening, a bolt is fixedly arranged on the bottom of the sealing plug, a fixing frame is arranged on the outer side of the bolt, a threaded opening matched with the bolt is formed in the inner side of the fixing frame, and the top of the fixing frame is fixedly arranged with the bottom of the valve body.

[0019] 3. Beneficial effects

[0020] One or more technical schemes provided in the embodiments of the application have at least the following technical effects or advantages:

[0021] (1) In the application, two ball valves are adopted, the two ball valves control the flow of media on the two sides of the valve body, when overhauling, the two ball valves can be closed to prevent the media from flowing into the valve body, so that the problem that the valve needs to be disassembled for overhauling and a large amount of residual media in the pipeline needs to be emptied is effectively solved, thereby the technical effects of simplifying the valve overhauling steps and reducing the waste of media are achieved.

[0022] (2) In the application, a sealing assembly is arranged on the bottom of the valve body, when overhauling the valve body, the sealing plug is removed from the sealing of the tapered opening, the impurities and media accumulated in the valve body can flow out through the tapered opening, and the impurities accumulated in the valve body are prevented from affecting the use of the valve. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a valve with a check valve function disclosed in a preferred embodiment of this application;

[0024] Figure 2 This is a schematic cross-sectional view of a valve with a check valve function disclosed in a preferred embodiment of this application;

[0025] Figure 3 for Figure 2 Enlarged structural diagram of section A in the middle;

[0026] Figure 4 This is a cross-sectional structural diagram of a valve body in a valve with a check valve function disclosed in a preferred embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the structure of a sealing assembly in a valve with a check valve function, as disclosed in a preferred embodiment of this application.

[0028] Figure 6 This is a schematic diagram showing the contact position between the inner side of the valve body and the valve disc in a valve with a check valve function disclosed in a preferred embodiment of this application;

[0029] The following are the labels in the diagram: 1. Valve body; 11. Port; 12. Tapered port; 13. Connecting flange; 2. Valve disc; 21. Threaded post; 22. Nut; 23. Mounting rod; 3. Ball valve; 31. Rotary switch; 32. Sealing ring; 4. Sealing assembly; 41. Sealing plug; 42. Bolt; 43. Fixing bracket; 431. Threaded port; 5. Valve body cover. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the accompanying drawings.

[0031] Reference Figure 1 , Figure 2 and Figure 6 This application discloses a valve with a check valve function, including a valve body 1, a valve disc 2 disposed on the inner side of the valve body 1, the valve disc 2 being used to ensure the check valve effect of the valve body 1, and two ball valves 3 symmetrically disposed on the inner side of the valve body 1, the two ball valves 3 being used to control the flow of the medium on both sides of the valve body 1.

[0032] In use, external pipes are connected to both sides of the valve body 1. The contact surface between the valve body 1 and the valve disc 2 is set as an inclined surface to ensure that the valve disc 2 prevents the fluid from flowing backward in the pipe. When the valve body 1 needs to be repaired, the medium input end is closed, and then the two ball valves 3 are rotated to block the entry of the medium on both sides of the valve body 1. There is no need to disassemble the valve body 1 for repair, which simplifies the disassembly steps. Furthermore, by blocking the two sides of the valve body 1 through the two ball valves 3, there is no need to empty the medium in the pipes on both sides, which reduces the waste of the medium.

[0033] With reference to Figure 1 , Figure 2 and Figure 3 , the top of the ball valve 3 is provided with a rotating switch 31, and the top of the valve body 1 is provided with two through holes 11 corresponding to the two rotating switches 31, and the two rotating switches 31 are provided with a sealing ring 32 between the two rotating switches 31 and the corresponding through hole 11, and the two sealing rings 32 are used to ensure the sealing effect of the inside of the valve body 1, and the valve disc 2 is rotatably arranged inside the valve body 1, and the valve disc 2 is fixedly provided with a threaded column 21 on one side, and the threaded column 21 is sleeved with a mounting rod 23 on the outside, and the mounting rod 23 is provided with a nut 22 on the outside, and the nut 22 is threadedly arranged on the inside of the threaded column 21, and the two sides of the valve body 1 are provided with a connecting flange 13, and the two connecting flanges 13 are used to connect the external pipeline, and the top of the valve body 1 is detachably provided with a valve cover 5.

[0034] When the valve body 1 is overhauled, the two rotating switches 31 are rotated to rotate the two ball valves 3, so that the two rotating switches 31 prevent the medium on both sides from entering the inside of the valve body 1, and then the valve disc 2 inside the valve body 1 can be overhauled by opening the valve cover 5, wherein the two sealing rings 32 seal the two through holes 11, and the two connecting flanges 13 are used to connect the external pipeline;

[0035] When the valve disc 2 is replaced, the nut 22 can be rotated to move the nut 22 on the threaded column 21, the nut 22 is removed, the nut 22 is removed from the fixing of the mounting rod 23, and the valve disc 2 can be removed and replaced with a new valve disc 2.

[0036] With reference to Figure 1 , Figure 4 , Figure 5 and Figure 6 , the bottom of the valve body 1 is provided with a tapered hole 12, and the inside of the tapered hole 12 is provided with a sealing assembly 4, and the sealing assembly 4 is used to seal the tapered hole 12, and the sealing assembly 4 comprises a sealing plug 41, the outside of the sealing plug 41 matches the inside of the tapered hole 12, and the bottom of the sealing plug 41 is fixedly provided with a bolt 42, and the outside of the bolt 42 is provided with a fixing frame 43, and the inside of the fixing frame 43 is provided with a threaded hole 431 matched with the bolt 42, and the top of the fixing frame 43 is fixedly arranged with the bottom of the valve body 1.

[0037] During long-term use of the valve body 1, impurities can accumulate on the inner side of the valve body 1. During maintenance of the valve body 1, after the ball valves 3 on both sides are closed, the bolt 42 is rotated to move the bolt 42 in the inner side of the fixing frame 43, so that the sealing plug 41 is moved out of the inner side of the tapered port 12. At this time, the medium and impurities in the inner side of the valve body 1 can be moved out through the tapered port 12, preventing the accumulation of impurities in the inner side of the valve body 1 and affecting the normal use of the valve body 1. The surface of the valve body 1 and the valve disc 2 is a bevel surface, which can effectively prevent backflow and prevent impurities from accumulating on the inner wall of the valve body 1. The impurities are guided to the bottom of the valve body 1, facilitating the flow of the impurities out of the tapered port 12.

[0038] In summary, the valve with the backflow prevention function disclosed in the embodiments of the application can be used in the following manner. The valve body 1 is connected to external pipelines through the connecting flanges 13 on both sides, and the valve disc 2 is used to prevent the reverse flow of the fluid in the pipelines, achieving the backflow prevention function of the valve body 1.

[0039] During maintenance of the valve body 1, the two ball valves 3 are rotated by rotating the two rotating switches 31, so that the two rotating switches 31 prevent the medium on both sides from entering the inner side of the valve body 1. The bolt 42 is rotated to move the bolt 42 in the inner side of the fixing frame 43, so that the sealing plug 41 is moved out of the inner side of the tapered port 12. At this time, the medium and impurities in the inner side of the valve body 1 can be moved out through the tapered port 12, preventing the accumulation of impurities in the inner side of the valve body 1. Subsequently, the valve disc 2 inside the valve body 1 can be maintained by opening the valve cover 5, and the nut 22 can be moved on the threaded column 21 by rotating the nut 22. The nut 22 is removed to release the fixation of the mounting rod 23 by the nut 22, so that the valve disc 2 can be removed and replaced with a new valve disc 2.

Claims

1. A valve having a non-return function, characterized by: The utility model relates to a valve body (1) is provided with valve disc (2) and two ball valves (3), two ball valves (3) are used for controlling the flow of medium on both sides of valve body (1), and the valve disc (2) is used for ensuring the check effect of valve body (1). The utility model relates to a valve body (1) is provided with valve disc (2) and two ball valves (3), two ball valves (3) are used for controlling the flow of medium on both sides of valve body (1), and the valve disc (2) is used for ensuring the check effect of valve body (1). The utility model relates to a valve body (1) is provided with valve disc (2) and two ball valves (3), two ball valves (3) are used for controlling the flow of medium on both sides of valve body (1), and the valve disc (2) is used for ensuring the check effect of valve body (1). The utility model relates to a valve body (1) is provided with valve disc (2) and two ball valves (3), two ball valves (3) are used for controlling the flow of medium on both sides of valve body (1), and the valve disc (2) is used for ensuring the check effect of valve body (1).

2. The valve with non-return function according to claim 1, characterized in that: The utility model relates to a valve body (1) is provided with valve disc (2) and two ball valves (3), two ball valves (3) are used for controlling the flow of medium on both sides of valve body (1), and the valve disc (2) is used for ensuring the check effect of valve body (1).

3. The valve with non-return function according to claim 2, characterized in that: The utility model relates to a valve body (1) is provided with valve disc (2) and two ball valves (3), two ball valves (3) are used for controlling the flow of medium on both sides of valve body (1), and the valve disc (2) is used for ensuring the check effect of valve body (1).

4. The valve with non-return function according to claim 1, characterized in that: The utility model relates to a valve body (1) is provided with valve disc (2) and two ball valves (3), two ball valves (3) are used for controlling the flow of medium on both sides of valve body (1), and the valve disc (2) is used for ensuring the check effect of valve body (1).

5. The valve with non-return function according to claim 1, characterized in that: The utility model relates to a valve body (1) is provided with valve disc (2) and two ball valves (3), two ball valves (3) are used for controlling the flow of medium on both sides of valve body (1), and the valve disc (2) is used for ensuring the check effect of valve body (1).

6. The valve with non-return function according to claim 1, characterized in that: ​ 7. The valve with non-return function according to claim 6, characterized in that: ​

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