Impact-resistant check valve

Abstract

The utility model discloses an impact-resistant check valve which comprises a valve body which is a right-angle check valve, a mounting opening is formed in the top side of the valve body, a water inlet end and a water outlet end are arranged at the side end and the lower end of the valve body, and a sealing edge is arranged at the water outlet end; the end cover is arranged at the upper end of the valve body and connected with the mounting opening through a bolt, the lower end of the end cover is provided with a bulge extending into the inner side of the valve body, and the inner side of the end cover is provided with a thread groove; the driving valve rod is vertically arranged and is provided with an upper section and a lower section; the check valve core can be matched with the sealing edge of the valve body, is close to or far away from the sealing edge when being driven by the driving valve rod, and enables the check valve to be in an opening and closing state; the impact-resistant part is arranged outside the driving valve rod, and the upper end of the impact-resistant part is connected with the lower end of the protrusion of the end cover. The lower end of the impact-resistant piece is installed on the check valve element through a framework. The check valve is improved based on an existing right-angle check valve, and the impact resistance of the valve is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of check valves, and specifically relates to a shock-resistant check valve. Background Art

[0002] A check valve refers to a valve whose closing member is a circular valve flap and which uses its own weight and the pressure of the medium to act to block the reverse flow of the medium. It belongs to the category of automatic valves and is also called a non-return valve, a one-way valve, a reflux valve or an isolation valve. The movement mode of the valve flap is divided into a lifting type and a swing type. The lifting check valve is similar in structure to a globe valve, only lacking a valve stem for driving the valve flap. The medium flows in from the inlet end and out from the outlet end. When the inlet pressure is greater than the sum of the valve flap weight and its flow resistance, the valve is opened. Conversely, when the medium flows backward, the valve closes.

[0003] However, the existing check valves are not equipped with a shock-resistant buffer structure. That is, when high-pressure and high-speed fluids pass through a suddenly closed valve, a strong water hammer effect will be generated, which will cause the valve body and the valve core to bear a large impact force, resulting in their damage. Based on this, the utility model proposes a shock-resistant check valve. This kind of check valve is improved based on the existing angle check valve, and can use the provided shock-resistant parts to carry out shock-resistant buffering for the valve cavity. The shock-resistant parts can move with the driving valve stem and are in an extended state (the valve is closed and stops the reverse flow) or a contracted state (the valve is opened). When the valve is in the closed state, the shock-resistant parts can be extended by using a metal mesh cover, and the water impact force is offset through a buffer ring, further ensuring the shock resistance of the valve. In addition, since the impact resistance at the connection between the valve core and the driving valve stem is poor, an impact protection can be achieved through a skeleton. Content of the Utility Model

[0004] The purpose of the utility model is to provide a shock-resistant check valve to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A shock-resistant check valve, comprising:

[0006] A valve body, which is a right-angle check valve, has an installation opening on its top side, has a water inlet end and a water outlet end on its side end and lower end, and has a sealing edge on the water outlet end;

[0007] An end cover, which is arranged on the upper end of the valve body and is connected to the installation opening by bolts, has a protrusion extending into the inner side of the valve body at its lower end, and has a threaded groove on its inner side;

[0008] A driving valve stem, which is arranged vertically and has two upper and lower sections. The upper section of the driving valve stem is a screw rod and has a handle at its top. The lower section of the driving valve stem is a support rod and its upper end is connected to the screw rod through a joint. The lower end of the lower section of the driving valve stem is connected to a check valve core through a joint;

[0009] The check valve core can cooperate with the sealing edge of the valve body, and when the valve stem is driven, it moves closer to or farther from the sealing edge, and the check valve is in an open or closed state;

[0010] The impact-resistant part is arranged outside the driving valve stem, and the upper end of the impact-resistant part is connected to the raised lower end of the end cover. The lower end of the impact-resistant part is installed on the check valve core through a frame.

[0011] Preferably, the frame is arranged outside the joint at the lower end of the driving valve stem, and the frame is a metal frame with good impact resistance.

[0012] Preferably, the cross-section of the impact-resistant member is in a cone shape with a larger upper end and a smaller lower end, and the impact-resistant member is a metal mesh cover, which is formed by connecting a plurality of retractable structures up and down.

[0013] Preferably, each of the retractable structures is provided with a lip on the outside, and a buffer ring for buffering water flow is connected to the outside of the lip via a spring.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The check valve of the utility model is improved on the existing right-angle check valve, and can use the impact-resistant parts to perform impact-resistant buffering on the valve cavity. The impact-resistant parts can move with the driving valve stem and be in an extended (valve closed check) or contracted state (valve opened). When the valve is closed, the impact-resistant parts can use the metal mesh cover to extend and use the buffer ring to reduce the water impact force, thereby further ensuring the impact resistance of the valve. In addition, since the impact resistance of the connection between the valve core and the driving valve stem is poor, the skeleton can provide impact protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the check valve core and the impact-resistant member in the embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure of the buffer ring in the embodiment of the utility model.

[0019] In the figure: 1. valve body; 2. end cover; 3. driving valve stem; 4. check valve core; 5. impact-resistant part; 501. lip; 502. buffer ring; 6. protrusion; 7. frame; 8. joint; 9. sealing edge. DETAILED DESCRIPTION

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. 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 protection scope of the present invention.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. 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 therefore should not be construed as a limitation to the present invention.

[0022] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", 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 elements. 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.

[0023] Please refer to Figures 1 - 3 , the present invention provides a technical solution: an impact-resistant check valve, including:

[0024] The valve body 1 is a right-angle check valve, with an installation opening provided on its top side, a water inlet end and a water outlet end provided on its side end and lower end, and a sealing edge 9 provided on the water outlet end;

[0025] The end cover 2 is arranged on the upper end of the valve body 1 and is connected to the installation opening by bolts. A protrusion 6 extending into the inner side of the valve body 1 is provided at its lower end, and a threaded groove is provided on its inner side;

[0026] The driving valve stem 3 is vertically arranged and has two upper and lower sections. The upper section of the driving valve stem 3 is a screw rod and a handle is provided at its top. The lower section of the driving valve stem 3 is a support rod and its upper end is connected to the screw rod through a joint 8. The lower end of the lower section of the driving valve stem 3 is connected to the check valve core 4 through a joint 8;

[0027] The check valve core 4 can cooperate with the sealing edge 9 of the valve body 1, and approach and move away from the sealing edge 9 when driven by the driving valve stem 3, so that the check valve is in an open and closed state;

[0028] The impact-resistant member 5 is arranged outside the driving valve stem 3, and the upper end of the impact-resistant member 5 is connected to the lower end of the protrusion 6 of the end cover 2. The lower end of the impact-resistant member 5 is installed on the check valve core 4 through a frame 7.

[0029] In this embodiment, the frame 7 is arranged outside the joint 8 at the lower end of the driving valve stem 3, and the frame 7 is a metal frame 7 with good impact resistance.

[0030] In this embodiment, the cross section of the impact-resistant member 5 is in a cone shape with a larger upper end and a smaller lower end. The impact-resistant member 5 is a metal mesh cover, and the metal mesh cover is formed by connecting a plurality of retractable structures up and down.

[0031] In this embodiment, a lip 501 is provided on the outer side of each retractable structure, and a buffer ring 502 for buffering water flow is connected to the outer side of the lip 501 via a spring.

[0032] Working principle: The above-mentioned check valve is improved based on the existing right-angle check valve, and can use the impact-resistant part 5 to provide impact-resistant buffering for the valve cavity. The impact-resistant part 5 can move with the driving valve stem 3 and be in an extended (valve closed check) or contracted state (valve open). When the valve is closed, the impact-resistant part 5 can use the metal mesh cover to extend and use the buffer ring 502 to reduce the water impact force, thereby further ensuring the impact resistance of the valve. In addition, since the impact resistance of the connection between the valve core and the driving valve stem 3 is poor, the skeleton 7 can provide impact protection.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An impact-resistant check valve, characterized in that, Comprising: A valve body (1), which is a right-angle check valve, has an installation opening on its top side, has a water inlet end and a water outlet end on its side end and lower end respectively, and has a sealing edge (9) on the water outlet end; An end cover (2), which is arranged at the upper end of the valve body (1) and is connected to the installation opening by bolts, has a protrusion (6) extending into the inner side of the valve body (1) at its lower end, and has a threaded groove on its inner side; A driving valve rod (3), which is arranged vertically and has two upper and lower sections. The upper section of the driving valve rod (3) is a screw rod and has a handle at its top. The lower section of the driving valve rod (3) is a support rod and its upper end is connected to the screw rod through a joint (8). The lower end of the lower section of the driving valve rod (3) is connected to a check valve core (4) through a joint (8); The check valve core (4) can cooperate with the sealing edge (9) of the valve body (1), and approaches and moves away from the sealing edge (9) relative to the sealing edge (9) when driven by the driving valve rod (3), and makes the check valve in an open and closed state; An impact-resistant member (5), which is arranged outside the driving valve rod (3). The upper end of the impact-resistant member (5) is connected to the lower end of the protrusion (6) of the end cover (2). The lower end of the impact-resistant member (5) is installed on the check valve core (4) through a skeleton (7).

2. The shock-resistant check valve according to claim 1, characterized in that: The skeleton (7) is arranged outside the joint (8) at the lower end of the driving valve rod (3), and the skeleton (7) is a metal skeleton (7) with good impact resistance.

3. A shock-resistant check valve according to claim 1, characterized in that: The cross-section of the impact-resistant member (5) is arranged in a conical shape with a large upper end and a small lower end. The impact-resistant member (5) is a metal mesh cover, and the metal mesh cover is formed by connecting a plurality of telescopic structures up and down.

4. A shock-resistant check valve according to claim 3, characterized in that: A lip (501) is arranged on the outer side of each telescopic structure, and a buffer ring (502) for buffering water flow is connected to the outer side of the lip (501) through a spring.

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