Swing mute check valve

Abstract

A swing mute check valve comprises a check valve body (101), a check valve seat (102) and a check valve clack (103), a valve seat mounting groove is formed in the inner wall of the side, close to the inlet end, of the check valve body (101), the check valve seat (102) is mounted in the valve seat mounting groove, and the check valve clack (103) is movably mounted on the inner wall of the check valve body (101) through a rocker arm (104); the utility model has the advantages that the collision noise is low when the valve clack is opened, the service life of the valve is prolonged, the valve seat is detachably mounted, and the maintenance is convenient when the sealing is not tight.

Description

Technical Field

[0001] The utility model relates to the field of valve equipment, and particularly relates to a swing check valve with silent function. Background Art

[0002] At present, a check valve is a valve that automatically opens and closes depending on the flow of the medium itself, and is often used to prevent the backflow of the medium. When the valve disc of the existing swing check valve is opened during use, the end of the valve disc impacts on the valve body, resulting in a relatively large impact sound, which affects the service life of the valve body. There is a lack of a check valve with a valve disc opening buffer function. Content of the Utility Model

[0003] The purpose of the utility model is to provide a swing check valve with silent function to address the above deficiencies.

[0004] The utility model includes a check valve body, a check valve seat, and a check valve disc. A valve seat installation groove is formed on the inner wall of one side of the check valve body near the inlet end. The check valve seat is installed in the valve seat installation groove. The check valve disc is movably installed on the inner wall of the check valve body through a rocker arm. A limiting protrusion is provided on the upper inner wall of the check valve body. An elastic buffer sheet is provided on the rocker arm, and the elastic buffer sheet is installed on the rocker arm through a set of springs. The check valve disc rotates and opens under the impact of the fluid medium, and the elastic buffer sheet abuts against the limiting protrusion.

[0005] Internal threads are provided on the inner wall of the valve seat installation groove, and external threads are provided on the outer wall of the check valve seat. The check valve seat is threadedly installed in the valve seat installation groove.

[0006] The check valve seat is annular, and a pair of knob grooves are provided on the inner wall of the check valve seat.

[0007] A rocker arm installation seat is provided on the upper inner wall of the check valve body. An ear seat is provided on the rocker arm installation seat, and the rocker arm is movably installed on the ear seat through a pin shaft.

[0008] The ear seat is detachably installed on the rocker arm installation seat through bolts.

[0009] The bottom of the limiting protrusion is beveled.

[0010] Flange plates are respectively provided at the inlet end and the outlet end of the check valve body, and annular sealing beveled openings are provided on the flange plates.

[0011] A valve disc installation hole is formed on the rocker arm. A positioning protrusion is provided in the middle of the check valve disc, and a threaded hole is formed on the positioning protrusion. The positioning protrusion is located in the valve disc installation hole, and a locking screw is screwed into the threaded hole. The check valve disc is pressed against the rocker arm through the nut of the locking screw.

[0012] A valve cover is provided at the top of the check valve body.

[0013] The advantages of the present utility model are as follows: When the valve flap opens, the collision noise is small, which prolongs the service life of the valve. The valve seat is installed in a detachable manner, making it convenient for maintenance when there is a problem with airtightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram when the valve flap of the present utility model opens.

[0015] Figure 2 It is the present utility model Figure 1 of the partial enlarged structural schematic diagram.

[0016] Figure 3 It is a schematic structural diagram when the valve flap of the present utility model closes. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0019] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0020] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of the invention is usually placed during use. It is only for the convenience of describing the present invention 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, and thus should not be construed as a limitation of the present invention. In addition, in the description of the present invention, if terms such as "first", "second", etc. are used only for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0021] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set" and "connected" 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 components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] As shown in the attached drawings, the utility model includes a check valve body 101, a check valve seat 102, and a check valve flap 103. A valve seat installation groove is provided on the inner wall of one side of the check valve body 101 near the inlet end. The check valve seat 102 is installed in the valve seat installation groove. The check valve flap 103 is movably installed on the inner wall of the check valve body 101 through a rocker arm 104. A limit protrusion 105 is provided on the upper inner wall of the check valve body 101. An elastic buffer piece 106 is provided on the rocker arm 104. The elastic buffer piece 106 is installed on the rocker arm 104 through a group of springs 107. The check valve flap 103 rotates and opens under the impact of the fluid medium, and the elastic buffer piece 106 abuts against the limit protrusion 105.

[0023] Internal threads are provided on the inner wall of the valve seat installation groove, and external threads are provided on the outer wall of the check valve seat 102. The check valve seat 102 is threadedly installed in the valve seat installation groove.

[0024] The check valve seat 102 is annular, and a pair of knob grooves 108 are provided on the inner wall of the check valve seat 102.

[0025] A rocker arm mounting seat is provided on the upper inner wall of the check valve body 101. An ear seat is provided on the rocker arm mounting seat. The rocker arm 104 is movably installed on the ear seat through a pin shaft.

[0026] The ear seat is detachably installed on the rocker arm mounting seat through bolts.

[0027] The bottom of the limit protrusion 105 is beveled.

[0028] Flange plates are respectively provided at the inlet end and the outlet end of the check valve body 101, and annular sealing beveled openings 109 are provided on the flange plates.

[0029] A valve flap installation hole is provided on the rocker arm 104. A positioning protrusion 110 is provided in the middle of the check valve flap 103. A threaded hole is provided on the positioning protrusion 110. The positioning protrusion 110 is located in the valve flap installation hole. A locking screw is screwed into the threaded hole, and the check valve flap 103 is pressed tightly on the rocker arm 104 through the nut of the locking screw.

[0030] A valve cover is provided at the top of the check valve body 101.

[0031] Embodiment 1: When the fluid medium flows from the inlet end of the check valve body 101 to the outlet end, under the impact of the fluid medium, the check valve flap 103 rotates around the pin shaft and opens upward. When the fluid medium flows from the outlet end of the check valve body 101 to the inlet end, the check valve flap 103 closes under the action of gravity and forms a seal with the end face of the check valve seat 102 to prevent the fluid medium from flowing back. When the check valve flap 103 opens, the elastic buffer piece 106 contacts the bottom inclined surface of the limit protrusion 105, and the collision noise is reduced under the elastic force of the spring 107. When installing the check valve seat 102, a special tool is inserted into the check valve seat 102. The special tool is provided with a knob protrusion that matches the knob groove 108, and the knob protrusion drives the check valve seat 102 to rotate and is screwed into the valve seat installation groove. When connecting the check valve body 101 to the pipeline, a ring groove that matches the annular sealing bevel 109 is provided at the pipeline opening to form a wedge-shaped sealing surface, and then it is connected by a flange to make the sealing performance better.

Claims

1. A swing silent check valve, characterized in that The invention comprises a check valve body (101), a check valve seat (102) and a check valve flap (103); a valve seat installation groove is formed on the inner wall of the check valve body (101) close to the inlet end; the check valve seat (102) is installed in the valve seat installation groove; the check valve flap (103) is movably installed on the inner wall of the check valve body (101) via a rocker arm (104); a limiting protrusion (105) is provided on the upper inner wall of the check valve body (101); an elastic buffer sheet (106) is provided on the rocker arm (104); the elastic buffer sheet (106) is installed on the rocker arm (104) via a group of springs (107); the check valve flap (103) rotates to open under the impact of a fluid medium, and the elastic buffer sheet (106) abuts against the limiting protrusion (105).

2. A swing silent check valve according to claim 1, characterized in that: An internal thread is arranged on the inner wall of the valve seat installation groove, an external thread is arranged on the outer wall of the check valve seat (102), and the check valve seat (102) is threadedly installed in the valve seat installation groove.

3. A swing silent check valve according to claim 2, characterized in that: The check valve seat (102) is annular, and a pair of knob grooves (108) are provided on the inner wall of the check valve seat (102).

4. The silent swing check valve according to claim 1, characterized in that: A rocker arm mounting seat is arranged on the inner wall of the upper part of the check valve body (101), an ear seat is arranged on the rocker arm mounting seat, and the rocker arm (104) is movably mounted on the ear seat through a pin shaft.

5. The swing silent check valve according to claim 4, characterized in that: The ear seat is detachably mounted on the rocker arm mounting seat by means of bolts.

6. The silent swing check valve according to claim 1, characterized in that: The bottom of the limiting protrusion (105) is an inclined surface.

7. The silent swing check valve according to claim 1, characterized in that: The inlet end and the outlet end of the check valve body (101) are respectively provided with flanges, and the flanges are provided with an annular sealing bevel (109).

8. The silent swing check valve according to claim 1, characterized in that: A valve disc mounting hole is formed on the rocker arm (104), a positioning protrusion (110) is provided in the middle of the check valve disc (103), a threaded hole is formed on the positioning protrusion (110), the positioning protrusion (110) is located in the valve disc mounting hole, a locking screw is screwed into the threaded hole, and the check valve disc (103) is pressed onto the rocker arm (104) through the nut of the locking screw.

9. The silent swing check valve according to claim 1, characterized in that: A valve cover is arranged on the top of the check valve body (101).

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