Double-plate check valve

Abstract

The utility model discloses a double-plate check valve which comprises a mounting plate, the back face of the mounting plate is fixedly connected with an adaptive block, filter screens which are symmetrically distributed are arranged in the adaptive block in a sliding mode, one end of each filter screen is fixedly connected with a connecting block, the connecting block is exposed out of the adaptive block, and the outer wall of the connecting block is fixedly connected with a handle. According to the double-plate check valve, the filter screens which are symmetrically distributed are arranged in the adaptive block in the sliding mode, impurities in fluid can be filtered out through the filter screens, and therefore the situation that the joints of the valve plates and the mounting plate are directly blocked by the impurities is avoided, the filter screens can be taken out, and the valve plates can be taken out only by pulling the handle. The handle drives the pull rod to release the fixation with the clamping groove, the filter screen can be taken out through the handle in a sliding mode to be replaced and cleaned, a shaft rod and a limiting rod are arranged between the mounting plates, the limiting rod is sleeved with a torque spring, the torque spring can enable the valve plate to conduct torque reset to be in a closed state after the valve plate is folded, and therefore the backflow situation is avoided after fluid passes through the valve plate.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a double-plate check valve. Background Art

[0002] A check valve is a valve whose opening and closing parts are circular valve plates and which rely on their own weight and medium pressure to produce movement to block the backflow of the medium. A check valve generally uses an independent valve shaft, on which a single valve plate or two valve plates are set. In actual use, the medium enters the check valve through the pipeline and pushes the valve plate open.

[0003] The existing double-plate check valve lacks a certain filtering structure, which easily causes debris in the fluid to stand on the valve plate and the joint between the valve plate and the valve body, thereby reducing the opening and closing efficiency of the valve plate. Utility Model Content

[0004] The purpose of the utility model is to provide a double-plate check valve to solve the problem that the existing double-plate check valve proposed in the above background technology lacks a certain filtering structure, which easily causes debris in the fluid to stand on the valve plate and the connection seam between the valve plate and the valve body, thereby reducing the opening and closing efficiency of the valve plate.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-plate check valve, comprising a mounting plate, an adapter block is fixedly connected to the back side of the mounting plate, a symmetrically distributed filter screen is slidably arranged in the adapter block, one end of the filter screen is fixedly connected to a connecting block, the connecting block is exposed outside the adapter block, a handle is fixedly connected to the outer wall of the connecting block, a card slot is provided at the top and bottom of the connecting block, a shaft rod is fixedly connected to the center of the mounting plate, valve plates are rotatably arranged on both sides of the shaft rod, one end of the valve plate is fixedly connected to symmetrically distributed connecting pieces, and the connecting pieces are arranged in the shaft rod.

[0006] Furthermore, a limit rod is arranged at the center of the mounting plate, the connecting member is located between the shaft rod and the limit rod, a torque spring is sleeved on the limit rod, and one end of the torque spring is matched with the limit rod.

[0007] Furthermore, the back side of the mounting plate is fixedly connected with symmetrically distributed connecting blocks, and a pull rod is slidably provided on the connecting blocks, and the pull rod is adapted to the card slot.

[0008] Furthermore, a handle is fixedly connected to the top of the pull rod, a pressure plate is fixedly sleeved on the pull rod, and the pressure plate is located at the bottom of the connecting block.

[0009] Furthermore, a compression spring is provided between the pressure plate and the connecting block, and the compression spring is sleeved on the pull rod.

[0010] Compared with the prior art, the beneficial effects of the utility model are: the double-plate check valve is reasonable and has the following advantages:

[0011] (1) A symmetrically distributed filter screen is slidably arranged inside the adapter block. The filter screen can filter the debris in the fluid, thereby preventing the debris from directly blocking the connection between the valve plate and the mounting plate. The filter screen can be taken out by pulling the handle so that the handle drives the pull rod to release the fixation with the card slot, so that the filter screen can be slid out through the handle for replacement and cleaning. An axle rod and a limit rod are arranged between the mounting plates, and a torque spring is sleeved on the limit rod. The torque spring can make the valve plate return to a closed state after being folded in half, thereby preventing the fluid from flowing back after passing through. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a front view of the overall structure of the utility model;

[0013] Figure 2 This is a rear view of the overall structure of the utility model;

[0014] Figure 3 For this utility model Figure 1 A local enlarged schematic diagram of point A shown;

[0015] Figure 4 For this utility model Figure 2 A local enlarged schematic diagram of point B is shown.

[0016] In the figure: 1. Mounting plate; 2. Adapter block; 3. Valve plate; 301. Connector; 4. Filter; 401. Handle; 402. Slot; 5. Connecting block; 6. Handle; 601. Pull rod; 602. Compression spring; 603. Pressure plate; 7. Limit rod; 8. Torque spring. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-4 , a technical solution provided by the utility model:

[0019] Embodiment: A double-plate check valve comprises a mounting plate 1, an adapter block 2 is fixedly connected to the back of the mounting plate 1, a filter screen 4 is slidably arranged in the adapter block 2 and is symmetrically distributed, one end of the filter screen 4 is fixedly connected to a connecting block, the connecting block is exposed outside the adapter block 2, a handle 401 is fixedly connected to the outer wall of the connecting block, a card slot 402 is provided at the top and bottom of the connecting block, a shaft is fixedly connected to the center of the mounting plate 1, valve plates 3 are rotatably arranged on both sides of the shaft, one end of the valve plate 3 is fixedly connected to a symmetrically distributed connector 301, the connector 301 is arranged in the shaft, and a connector 401 is arranged in the center of the mounting plate 1. A limit rod 7 is provided, and a connecting member 301 is located between the shaft rod and the limit rod 7. A torque spring 8 is sleeved on the limit rod 7, and one end of the torque spring 8 is matched with the limit rod 7. The back of the mounting plate 1 is fixedly connected with a symmetrically distributed connecting block 5, and a pull rod 601 is slidably provided on the connecting block 5. The pull rod 601 is matched with the slot 402. A handle 6 is fixedly connected to the top of the pull rod 601, and a pressure plate 603 is sleeved and fixed on the pull rod 601. The pressure plate 603 is located at the bottom of the connecting block 5, and a compression spring 602 is provided between the pressure plate 603 and the connecting block 5, and the compression spring 602 is sleeved on the pull rod 601.

[0020] A symmetrically distributed filter screen 4 is slidingly arranged in the adapter block 2. The filter screen 4 can filter the debris in the fluid, thereby preventing the debris from directly blocking the connection between the valve plate 3 and the mounting plate 1. The filter screen 4 can be taken out by pulling the handle 6 so that the handle 6 drives the pull rod 601 to release the fixation with the card slot 402, so that the filter screen 4 can be slid and taken out through the handle 401 for replacement and cleaning. An axial rod and a limit rod 7 are arranged between the mounting plates 1, and a torque spring 8 is sleeved on the limit rod 7. The torque spring 8 can make the valve plate 3 reset to a closed state after being folded in half, thereby preventing the fluid from flowing back after passing through.

[0021] Working principle: When in use, first when the fluid enters the valve body from one side of the mounting plate 1, the valve plate 3 will be pushed open by the pressure of the fluid, allowing the fluid to pass through the valve body smoothly;

[0022] Secondly, when the fluid tries to flow back from the other side, the valve plate 3 will be automatically folded in half by the action of the torque spring 8 and tightly closed to prevent the backflow of the fluid;

[0023] Finally, the function of the filter 4 is to filter the debris in the fluid to prevent the debris from directly blocking the connection between the valve plate 3 and the mounting plate 1. The filter 4 is symmetrically distributed in the adapter block 2 and can be easily taken out for cleaning and replacement. Simply pull the handle 6 to release the pull rod 601 from the slot 402, and then slide the filter 4 out through the handle 401.

[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A double-plate check valve, comprising a mounting plate, characterized in that: An adapter block is fixedly connected to the back side of the mounting plate, and symmetrically distributed filters are slidably arranged in the adapter block, one end of the filter screen is fixedly connected to a connecting block, the connecting block is exposed outside the adapter block, a handle is fixedly connected to the outer wall of the connecting block, and slots are provided at the top and bottom of the connecting block, a shaft rod is fixedly connected to the center of the mounting plate, valve plates are rotatably arranged on both sides of the shaft rod, one end of the valve plate is fixedly connected to symmetrically distributed connecting pieces, and the connecting pieces are arranged in the shaft rod.

2. A double plate check valve according to claim 1, characterized in that: A limiting rod is arranged at the center of the mounting plate, the connecting member is located between the shaft rod and the limiting rod, a torque spring is sleeved on the limiting rod, and one end of the torque spring is matched with the limiting rod.

3. A double-plate check valve according to claim 1, characterized in that: The back side of the mounting plate is fixedly connected with symmetrically distributed connecting blocks, and the connecting blocks are slidably provided with pull rods, which are matched with the card slots.

4. A double-plate check valve according to claim 3, characterized in that: The top of the pull rod is fixedly connected with a handle, and a pressing plate is fixedly sleeved on the pull rod, and the pressing plate is located at the bottom of the connecting block.

5. A double-plate check valve according to claim 4, characterized in that: A compression spring is arranged between the pressure plate and the connecting block, and the compression spring is sleeved on the pull rod.

Images