Double-valve-clack check valve

Abstract

The utility model discloses a double-valve-clack check valve, relates to the technical field of check valves, and aims to solve the technical problem that when a valve clack in an existing double-valve-clack check valve is not reset thoroughly, personnel cannot easily find and replace the valve clack in time, the double-valve-clack check valve comprises a valve sleeve, and a check ring is arranged on the inner wall of the valve sleeve. An elastic rotating structure is arranged at the position, above the check ring, of the center of the interior of the valve sleeve, two sets of symmetrical valve clack bodies are movably arranged on the elastic rotating structure, positioning sleeves are arranged at the positions, below the check ring, of the two sides of the valve sleeve, positioning notches are formed in one sides of the positioning sleeves, and detection rods are rotationally arranged at the centers of the positioning sleeves. The detection rod comprises a main rod, a pointing rod and a contact rod, the main rod, the pointing rod and the contact rod are in a Z shape, the pointing rod is arranged at the outer side end, penetrating to the valve sleeve, of the main rod, the contact rod is arranged at the inner side end, penetrating to the valve sleeve, of the main rod, and the pointing rod is located in the positioning notch. The valve clack resetting device has the advantage of detecting the resetting effect of the valve clack.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, and more specifically to a double-valve disc check valve. Background Art

[0002] A check valve is a valve whose opening and closing part is a circular disc and which relies on its own weight and medium pressure to produce movement to block the backflow of the medium. It is an automatic valve and is also called a non-return valve, one-way valve, reflux valve or isolation valve. A double-disc check valve is a common type of check valve.

[0003] The existing double-valve flap check valve achieves effective resetting through the cooperation of the spring, but the elasticity of the spring will weaken during long-term use. If the elasticity of the spring weakens to a certain extent, the valve flap is prone to incomplete resetting. When this happens, it is difficult for personnel to discover and repair or replace it in time, which can easily cause use failures. In view of this, we propose a double-valve flap check valve. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art, meet practical needs, and provide a double-valve flap check valve to solve the technical problem that when the valve flap in the current double-valve flap check valve is not completely reset, personnel cannot promptly discover and replace it.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a double-valve disc check valve, comprising a valve sleeve, a retaining ring is arranged on the inner wall of the valve sleeve, an elastic rotating structure is arranged at the center above the retaining ring inside the valve sleeve, two groups of symmetrical valve disc bodies are movably arranged on the elastic rotating structure, positioning sleeves are arranged on both sides of the valve sleeve below the retaining ring, a positioning notch is opened on one side of the positioning sleeve, a detection rod is rotatably arranged at the center of the positioning sleeve, the detection rod comprises a main rod, a pointing rod and a contact rod, the main rod, the pointing rod and the contact rod are Z-shaped, the pointing rod is arranged at the outer end of the main rod penetrating the valve sleeve, the contact rod is arranged at the inner end of the main rod penetrating the valve sleeve, and the pointing rod is located in the positioning notch;

[0006] The contact rod is arranged at 45° to the valve flap body, and one end of the contact rod contacts the bottom of the valve flap body. The positioning notch stroke matches the 45° rotation stroke of the pointing rod. A guide plate is arranged on the side of the contact rod facing away from the valve flap body.

[0007] The utility model adopts the designed detection rod and positioning sleeve structure. When the two groups of valve disc bodies are closed, the pointing rod of the detection rod will be tightly attached to one side of the positioning notch of the positioning sleeve, which means that the valve disc body is in a completely reset state. When the spring elasticity is reduced and cannot drive the valve disc body to completely reset and close, the pointing rod of the detection rod will be in a separated state from one side of the positioning notch of the positioning sleeve. Therefore, personnel can accurately judge the reset of the valve disc body by the position of the pointing rod of the detection rod. When the valve disc body cannot be reset and closed in time, personnel can find it in time and repair or replace it, and locate it. The positioning notch stroke of the sleeve matches the 45° rotation stroke of the pointing rod, and the contact rod of the detection rod is set at a 45° angle to the valve disc body, and a guide plate is set on the contact rod. Therefore, when the valve disc body is opened, under the action of the fluid, the guide plate can drive the detection rod to rotate 45°. At this time, the guide plate and the fluid are horizontal. At this time, the pointing rod will move to the other side of the positioning notch, and the valve disc body can be detected in the open state. Only when the valve disc body is completely reset and closed, the pointing rod will be tightly attached to the initial side of the positioning notch, so as to better detect the opening and reset states of the valve disc body.

[0008] Preferably, a sealing ring is arranged around the bottom of the valve disc body, and a sealing groove symmetrical to the sealing ring is opened on the top of the retaining ring.

[0009] Preferably, the elastic rotation structure comprises a first shaft and a second shaft, the first shaft is arranged in the valve sleeve, both ends of the first shaft are rotatably arranged with mounting sleeves, and the mounting sleeves are connected to the corresponding valve disc body.

[0010] Preferably, the second shaft is arranged in the valve sleeve, and the second shaft is located above the first shaft, a spring is arranged on the first shaft, and one end of the spring is connected to the second shaft, and the other end of the spring is connected to the valve disc body.

[0011] Preferably, a sleeve is arranged on the guide plate, and the sleeve is sleeved on the contact rod, and support rods are connected between the two sides of the guide plate and the contact rod.

[0012] Preferably, a ball is movably arranged at one end of the contact rod.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model adopts the designed detection rod and positioning sleeve structure. When the two groups of valve disc bodies are closed, the pointing rod of the detection rod will be close to the one side of the positioning notch of the positioning sleeve, indicating that the valve disc body is in a completely reset state. When the spring elasticity is reduced and cannot drive the valve disc body to completely reset and close, the pointing rod of the detection rod will be in a separated state from the one side of the positioning notch of the positioning sleeve. Therefore, personnel can accurately judge the reset status of the valve disc body by the position of the pointing rod of the detection rod. When the valve disc body cannot be reset and closed in time, personnel can find it in time and repair or replace it, which solves the technical problem that when the valve disc in the current double-valve disc check valve is not completely reset, it is difficult for personnel to find and replace it in time. Therefore, the utility model has the advantage of detecting the reset effect of the valve disc.

[0015] 2. In the utility model, the positioning notch stroke of the positioning sleeve matches the 45° rotation stroke of the pointing rod, and the contact rod of the detection rod is set at a 45° angle to the valve disc body, and a guide plate is set on the contact rod. Therefore, when the valve disc body is opened, under the action of the fluid, the guide plate can drive the detection rod to rotate 45°. At this time, the guide plate and the fluid are horizontal. At this time, the pointing rod will move to the other side of the positioning notch, and the valve disc body can be detected in the open state. Only when the valve disc body is completely reset and closed, the pointing rod will be tightly attached to the initial side of the positioning notch, so as to better detect the opening and reset states of the valve disc body. 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 first overall cross-sectional structure of the utility model;

[0018] Figure 3 It is a second overall cross-sectional structural schematic diagram of the utility model;

[0019] Figure 4 This is a schematic diagram of the detection rod structure of the utility model.

[0020] Description of the numbers in the figure:

[0021] 1. Valve sleeve; 2. retaining ring; 201. sealing groove; 3. elastic rotating structure; 301. first shaft rod; 302. mounting sleeve; 303. second shaft rod; 304. spring; 4. valve disc body; 401. sealing ring; 5. detection rod; 501. main rod; 502. pointing rod; 503. contact rod; 504. ball; 505. guide plate; 506. sleeve; 507. support rod; 6. positioning sleeve; 601. positioning notch. DETAILED DESCRIPTION

[0022] like Figures 1 to 4 As shown, the utility model relates to a double-valve disc check valve, comprising a valve sleeve 1, a retaining ring 2 is arranged on the inner wall of the valve sleeve 1, an elastic rotating structure 3 is arranged at the center above the retaining ring 2 inside the valve sleeve 1, two groups of symmetrical valve disc bodies 4 are movably arranged on the elastic rotating structure 3, positioning sleeves 6 are arranged on both sides of the valve sleeve 1 below the retaining ring 2, a positioning notch 601 is opened on one side of the positioning sleeve 6, a detection rod 5 is rotatably arranged at the center of the positioning sleeve 6, and the detection rod 5 includes a main rod 501, a pointing rod 502 and The contact rod 503, the main rod 501, the pointing rod 502 and the contact rod 503 are in a Z shape. The pointing rod 502 is arranged at the outer end of the main rod 501 that penetrates the valve sleeve 1, and the contact rod 503 is arranged at the inner end of the main rod 501 that penetrates the valve sleeve 1. The pointing rod 502 is located in the positioning notch 601. When the fluid pressure at the water inlet of the valve sleeve 1 increases, the two sets of valve disc bodies 4 will rotate to form a folded state. At this time, the retaining ring 2 is in a naked state, and the fluid can pass normally. When the fluid pressure at the water inlet of the valve sleeve 1 increases, the retaining ring 2 is in a naked state, and the fluid can pass normally. When the force decreases, under the action of the elastic rotating structure 3, the two groups of valve disc bodies 4 will be driven to reset, and the retaining ring 2 will be completely blocked and closed to achieve the flow interruption effect. Moreover, when the valve disc body 4 is acted upon by the fluid at the water outlet, the valve disc body 4 will be pushed toward the retaining ring 2, so that the valve disc body 4 will close the retaining ring 2, thereby also achieving the effect of preventing backflow. In this process, when the two groups of valve disc bodies 4 are closed, the pointing rod 502 of the detection rod 5 will be tightly attached to the side of the positioning notch 601 of the positioning sleeve 6, which indicates that the valve disc body 4 is in a fully reset state. When the elasticity of the spring 304 is reduced and the valve disc body 4 cannot be fully reset and closed, the pointing rod 502 of the detection rod 5 will be separated from the side of the positioning notch 601 of the positioning sleeve 6. Therefore, personnel can accurately judge the reset of the valve disc body 4 by the position of the pointing rod 502 of the detection rod 5. When the spring 304 cannot drive the valve disc body 4 to reset and close in time, personnel can find it in time and repair or replace it.

[0023] Specifically, a sealing ring 401 is arranged around the bottom of the valve flap body 4, and a sealing groove 201 symmetrical to the sealing ring 401 is opened on the top of the retaining ring 2. When the valve flap body 4 is closed, the sealing ring 401 is embedded in the sealing groove 201 to ensure the sealing effect of the valve flap body 4 on the retaining ring 2.

[0024] Furthermore, the elastic rotation structure 3 includes a first shaft rod 301 and a second shaft rod 303. The first shaft rod 301 is arranged in the valve sleeve 1. Both ends of the first shaft rod 301 are rotatably arranged with mounting sleeves 302, and the mounting sleeves 302 are connected to the corresponding valve flap body 4. With the cooperation of the first shaft rod 301 and the mounting sleeve 302, the valve flap body 4 can rotate.

[0025] Furthermore, the second shaft rod 303 is arranged in the valve sleeve 1, and the second shaft rod 303 is located above the first shaft rod 301. A spring 304 is arranged on the first shaft rod 301, and one end of the spring 304 is connected to the second shaft rod 303, and the other end of the spring 304 is connected to the valve flap body 4. With the cooperation of the second shaft rod 303, one end of the spring 304 will apply a thrust to the valve flap body 4 to make it fit on the retaining ring 2 for sealing. When the valve flap body 4 is subjected to the water inlet pressure, the valve flap body 4 will rotate. When the water inlet pressure is reduced to a certain level, the spring 304 will drive the valve flap body 4 to reset, thereby sealing the retaining ring 2.

[0026] In an embodiment of the present utility model, the contact rod 503 is arranged at 45° to the valve flap body 4, and one end of the contact rod 503 contacts the bottom of the valve flap body 4, the stroke of the positioning slot 601 matches the stroke of the pointing rod 502 rotating 45°, and a guide plate 505 is arranged on the side of the contact rod 503 facing away from the valve flap body 4. Therefore, when the valve flap body 4 is opened, under the action of the fluid, the guide plate 505 can drive the detection rod 5 to rotate 45°. At this time, the guide plate 505 is horizontal with the fluid, and the pointing rod 502 will move to the other side of the positioning slot 601, so that the valve flap body 4 can be detected in the open state, and only when the valve flap body 4 is completely reset and closed, the pointing rod 502 will be tightly attached to the initial side of the positioning slot 601, so that the opening and reset states of the valve flap body 4 can be better detected.

[0027] Specifically, a sleeve 506 is arranged on the guide plate 505, and the sleeve 506 is sleeved on the contact rod 503. Support rods 507 are connected between the two sides of the guide plate 505 and the contact rod 503. After the sleeve 506 on the guide plate 505 is sleeved on the contact rod 503, bolts are screwed in to fix it, and then the support rods 507 are used to support and fix the guide plate 505.

[0028] Furthermore, a ball 504 is movably arranged at one end of the contact rod 503, and the contact rod 503 contacts the valve flap body 4 through the ball 504 to reduce the friction between the two. When the valve flap body 4 is closed, the contact rod 503 can be pushed to rotate more smoothly.

[0029] Working principle: This embodiment provides a double-valve flap check valve. When in use, first, when the fluid pressure at the water inlet of the valve sleeve 1 increases, the two sets of valve flap bodies 4 will rotate to form a folded state. At this time, the retaining ring 2 is in an exposed state, and the fluid can pass normally. When the fluid pressure at the water inlet of the valve sleeve 1 decreases, the two sets of valve flap bodies 4 will be driven to reset under the action of the elastic rotating structure 3, and the retaining ring 2 will be completely blocked and closed to achieve the flow interruption effect. Moreover, when the valve flap body 4 is acted upon by the fluid at the water outlet, the valve flap body 4 will also be pushed toward the retaining ring 2, so that the valve flap body 4 will close the retaining ring 2, thereby also achieving the effect of preventing backflow;

[0030] Secondly, during this process, when the two groups of valve flap bodies 4 are closed, the pointing rod 502 of the detection rod 5 will be tightly attached to one side of the positioning notch 601 of the positioning sleeve 6, which means that the valve flap body 4 is in a fully reset state. When the elasticity of the spring 304 is reduced and cannot drive the valve flap body 4 to fully reset and close, the pointing rod 502 of the detection rod 5 will be separated from one side of the positioning notch 601 of the positioning sleeve 6. Therefore, personnel can accurately judge the reset of the valve flap body 4 by the position of the pointing rod 502 of the detection rod 5. When the spring 304 cannot drive the valve flap body 4 to reset and close in time, personnel can find it in time and repair or replace it.

[0031] Finally, when the valve flap body 4 is opened, under the action of the fluid, the guide plate 505 can drive the detection rod 5 to rotate 45°. At this time, the guide plate 505 is horizontal with the fluid. At this time, the pointing rod 502 will move to the other side of the positioning slot 601, and the valve flap body 4 can be detected to be in an open state. Moreover, only when the valve flap body 4 is completely reset and closed, the pointing rod 502 will be tightly attached to the initial side of the positioning slot 601, so as to better detect the opening and reset states of the valve flap body 4.

[0032] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A double disc check valve, characterized in that: The invention comprises a valve sleeve (1), wherein a retaining ring (2) is arranged on the inner wall of the valve sleeve (1), an elastic rotating structure (3) is arranged in the center above the retaining ring (2) inside the valve sleeve (1), two groups of symmetrical valve disc bodies (4) are movably arranged on the elastic rotating structure (3), positioning sleeves (6) are arranged on both sides of the valve sleeve (1) below the retaining ring (2), a positioning notch (601) is provided on one side of the positioning sleeve (6), and a detection member (6) is rotatably arranged at the center of the positioning sleeve (6) A detection rod (5), the detection rod (5) comprising a main rod (501), a pointing rod (502) and a contact rod (503), the main rod (501), the pointing rod (502) and the contact rod (503) being in a Z shape, the pointing rod (502) being arranged at the outer end of the main rod (501) penetrating the valve sleeve (1), the contact rod (503) being arranged at the inner end of the main rod (501) penetrating the valve sleeve (1), and the pointing rod (502) being located in a positioning notch (601); The contact rod (503) is arranged at 45° to the valve flap body (4), and one end of the contact rod (503) contacts the bottom of the valve flap body (4). The stroke of the positioning notch (601) matches the stroke of the pointing rod (502) rotating 45°. A guide plate (505) is arranged on the side of the contact rod (503) facing away from the valve flap body (4).

2. A double-valve check valve according to claim 1, characterized in that: A sealing ring (401) is arranged around the bottom of the valve disc body (4), and a sealing groove (201) symmetrical to the sealing ring (401) is formed on the top of the retaining ring (2).

3. A double-valve check valve according to claim 1, characterized in that: The elastic rotating structure (3) comprises a first shaft (301) and a second shaft (303), wherein the first shaft (301) is arranged in the valve sleeve (1), and mounting sleeves (302) are rotatably arranged at both ends of the first shaft (301), and the mounting sleeves (302) are connected to the corresponding valve disc body (4).

4. A double-valve check valve according to claim 3, characterized in that: The second shaft (303) is arranged in the valve sleeve (1), and the second shaft (303) is located above the first shaft (301). A spring (304) is arranged on the first shaft (301), and one end of the spring (304) is connected to the second shaft (303), and the other end of the spring (304) is connected to the valve disc body (4).

5. A double-valve check valve according to claim 1, characterized in that: A sleeve (506) is arranged on the guide plate (505), and the sleeve (506) is sleeved on the contact rod (503). Support rods (507) are connected between the two sides of the guide plate (505) and the contact rod (503).

6. A double-valve check valve according to claim 1, characterized in that: A ball (504) is movably arranged at one end of the contact rod (503).

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