Micro-resistance check valve

Abstract

The present application provides a kind of micro-resistance check valve, it is related to valve technical field, the micro-resistance check valve includes: valve body, annular port is provided in valve body;Mounting seat, one end rotates in annular port, the front view shape of mounting seat is right trapezoid, so that the part of mounting seat is always below under the action of gravity;Valve clack assembly, it is installed in the other end of mounting seat, so that the liquid medium in valve body can only flow in one direction;Therefore the height of gravity center is not big when valve clack opens, so the resistance that liquid medium flows is smaller, and because mounting seat can rotate around annular port, so the heavier part of mounting seat is always at the bottom, so that valve clack is always in the same direction, so when the angle of check valve changes, it will not affect check effect.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically a low-resistance check valve. Background Technology

[0002] Check valves are a common type of valve in pipeline systems, mainly installed at the pump outlet, used to connect and disconnect fluid media in the pipeline system. Existing swing check valves mainly consist of a valve body, a valve seat, and a check valve disc. The valve seat has a valve seat sealing surface and is fixed inside the flow channel of the valve body.

[0003] Chinese patent CN109990124B discloses a check valve with a protective surface. The valve is characterized by a scraping assembly within its chamber, comprising a baffle block, a secondary chamber, a telescopic sleeve, a scraper, a compression spring, a connecting plate, and a push rod. The secondary chamber is hollow and positioned above the valve seat. The telescopic sleeve is vertically positioned within the secondary chamber and contains a hydraulic chamber. One end of the push rod is hinged to the middle of a rocker arm. The scraper is annular and parallel to the valve seat sealing surface within the secondary chamber. The connecting plate is a flat plate positioned horizontally, with one end fixedly connected to the upper end of the scraper and the other end fixedly connected to the upper end of the telescopic sleeve. A vertically mounted compression spring is positioned above the connecting plate. This compression spring pushes the scraper downwards into the chamber to scrape away the medium adhering to the valve seat sealing surface, thus preventing the medium from adhering to the valve seat sealing surface.

[0004] In the above scheme, the valve disc is controlled by a spring to close, thereby preventing the backflow of the fluid medium. However, using a spring will result in greater resistance during fluid medium transportation. If a spring is not used and the valve disc is reset by gravity, the installation angle of the check valve is fixed, and the check valve cannot be deflected after installation, otherwise it will not be able to prevent the liquid medium from flowing back. Summary of the Invention

[0005] The purpose of this invention is to provide a low-resistance check valve, which aims to solve the problem that the existing check valves have high resistance to fluid media, and that reducing the resistance requires limiting the installation angle of the check valve.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: the low-resistance check valve comprises:

[0007] The valve body has an annular opening inside.

[0008] The mounting base has one end that rotates into the annular opening. The front view of the mounting base is a right trapezoid, so that a part of the mounting base is always located at the bottom under the action of gravity.

[0009] The valve disc assembly is installed at the other end of the mounting base, thereby allowing the liquid medium inside the valve body to flow in only one direction.

[0010] A further technical solution of the present invention is that the mounting base includes a left port fitted onto the annular opening, and also includes a right port and a middle tube, with an included angle of °-° between the left port and the right port.

[0011] A further technical solution of the present invention is that the valve disc assembly includes a mounting shaft and two valve discs rotatably mounted on the mounting shaft, wherein the mounting shaft is installed inside the right port, and the length direction of the mounting shaft is the same as the diameter direction of the right port.

[0012] A further technical solution of the present invention is that the projection of the mounting shaft in the frontal view direction coincides with the right-angled side of the right-angled trapezoid of the frontal projection of the intermediate tube.

[0013] A further technical solution of the present invention is that the valve disc is semi-circular in shape.

[0014] A further technical solution of the present invention is that a limiting ring for limiting the maximum inward rotation angle of the valve disc is provided inside the right port, and a limiting block for limiting the maximum outward rotation angle of the valve disc is provided on the outer surface of the right port.

[0015] A further technical solution of the present invention is that the limiting ring is a rubber sealing ring.

[0016] A further technical solution of the present invention is that the valve body is formed by connecting a left valve body and a right valve body with bolts.

[0017] The beneficial effects of this invention are:

[0018] When this invention is used, the height change of the center of gravity when the valve disc opens is small, so the resistance encountered when the liquid medium flows is small. Also, since the mounting base can rotate around the annular opening, the heavier part of the mounting base is always located at the bottom, so that the valve disc is always in the same direction, and the check valve's check effect is not affected when the angle of the check valve changes. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of a specific embodiment of the present invention.

[0020] Figure 2 This is a cross-sectional view of a specific embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the valve disc assembly in a specific embodiment of the present invention.

[0022] Figure 4 This is a structural schematic diagram of the valve disc assembly from another perspective in a specific embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of the valve assembly when it is open, according to a specific embodiment of the present invention.

[0024] Figure 6 This is a front view of the mounting base in a specific embodiment of the present invention.

[0025] In the diagram: 1. Valve body; 11. Flange; 12. Annular port; 13. Bearing; 14. Mounting seat; 141. Left port; 142. Intermediate pipe; 143. Right port; 15. Valve disc assembly; 151. Mounting shaft; 152. Valve disc; 153. Limiting block; 154. Limiting ring. Detailed Implementation

[0026] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0027] Example 1:

[0028] like Figure 1 As shown, a low-resistance check valve includes a valve body 1, which is composed of a left valve body and a right valve body connected by bolts. A flow channel is provided inside the valve body 1, and flanges 11 are installed at both ends of the flow channel. The valve body 1 is horizontally installed into the pipeline through the flanges 11.

[0029] like Figure 2 and 6 As shown, an annular opening 12 is provided inside the valve body 1. A bearing 13 is fitted on the annular opening 12. A mounting seat 14 is fitted on the outer ring of the bearing 13. Therefore, the mounting seat 14 can rotate relative to the annular opening 12. The mounting seat 14 includes a left port 141 fitted on the annular opening 12, a right port 143, and a middle tube 142. The left port 141 and the right port 143 are not parallel and have an included angle of 15°-40°. Therefore, the front view shape of the middle tube 142 is a right trapezoid. That is, the center of gravity of the mounting seat 14 is not on the axis of the annular opening 12. Therefore, the longer part of the middle tube 142 will always be at the bottom under the action of gravity.

[0030] like Figure 3 and 5 As shown, a mounting shaft 151 with the same diameter direction is installed inside the right port 143, and the projection of the mounting shaft 151 in the frontal view direction coincides with the right-angled side of the right trapezoid of the frontal projection of the intermediate pipe 142. Therefore, the projection of the mounting shaft 151 on the plane where the flange 11 is located always remains vertical. Two semi-circular valve discs 152 are hinged on the mounting shaft 151. The valve discs 152 can rotate outward of the right port 143, so that the liquid medium can pass through the right port 143. Since the valve discs 152 open outward, the height change of the center of gravity when the valve discs 152 are open is not large, so the resistance encountered by the liquid medium when flowing is small.

[0031] like Figure 3 and 4 As shown, the right port 143 is provided with a limiting ring 154 to limit the maximum inward rotation angle of the valve disc 152, so that when the valve disc 152 rotates inward to the maximum angle, it is parallel to the end face of the right port 143. The outer surface of the right port 143 is provided with a limiting block 153 to limit the maximum outward rotation angle of the valve disc 152, so that the rotation path angle of the valve disc 152 is less than 80°.

[0032] The limiting ring 154 is a rubber sealing ring, which provides a good sealing effect when the valve disc 152 is in contact with the limiting ring 154.

Claims

1. A low-resistance check valve, characterized in that, include: Valve body (1), with an annular opening (12) inside the valve body (1); Mounting base (14), one end of which rotates at the annular opening (12), the front view shape of mounting base (14) is a right trapezoid, so that a part of mounting base (14) is always located at the bottom under the action of gravity; The valve disc assembly (15) is installed at the other end of the mounting base (14), so that the liquid medium in the valve body (1) can only flow in one direction; The mounting base (14) includes a left port (141) fitted onto the annular opening (12), a right port (143) and a middle tube (142). There is an included angle of 15°-40° between the left port (141) and the right port (143). The valve assembly (15) includes a mounting shaft (151) and two valve discs (152) rotatably mounted on the mounting shaft (151). The mounting shaft (151) is installed inside the right port (143), and the length direction of the mounting shaft (151) is the same as the diameter direction of the right port (143).

2. The low-resistance check valve according to claim 1, characterized in that, The projection of the mounting shaft (151) in the frontal view direction coincides with the right-angled side of the right-angled trapezoid of the frontal projection of the intermediate tube (142).

3. The low-resistance check valve according to claim 2, characterized in that, The valve disc (152) is semi-circular in shape.

4. The low-resistance check valve according to claim 3, characterized in that, The right port (143) is provided with a limiting ring (154) for limiting the maximum inward rotation angle of the valve disc (152), and a limiting block (153) is provided on the outer surface of the right port (143) for limiting the maximum outward rotation angle of the valve disc (152).

5. The low-resistance check valve according to claim 4, characterized in that, The limiting ring (154) is a rubber sealing ring.

6. The low-resistance check valve according to any one of claims 1-5, characterized in that, The valve body (1) is composed of a left valve body and a right valve body connected by bolts.

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