Valve with anti-backflow structure

Abstract

The utility model discloses a valve with anti -backflow structure, including valve seat, the valve seat top fixed installation has upper valve body, and the inside of upper valve body is provided with manual valve plate mechanism, the inside of valve seat liquid inlet channel is installed with filter screen, and the inside of valve seat liquid outlet channel is provided with anti -backflow mechanism, the anti -backflow mechanism includes with the fixed box of valve seat matching, and the fixed box one side is provided with liquid inlet, and the other side is provided with liquid outlet, the inside of fixed box is provided with mounting block, and mounting block one side is installed with the sealing plug of liquid inlet cooperation uses, the other side of mounting block is connected with the fixed plate of fixed box inside through the spring of symmetrical setting. This valve with anti -backflow structure, the device is to solve the problem that the existing valve only plays the role of water flow, cannot prevent water backflow, through in valve seat top fixed installation has upper valve body, the inside of valve seat liquid inlet channel is installed with filter screen, and the inside of valve seat liquid outlet channel is provided with anti -backflow mechanism.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a valve with an anti-backflow structure. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control the parameters (temperature, pressure, and flow rate) of the transported medium. Based on their function, they can be classified as shut-off valves, check valves, regulating valves, etc.

[0003] A search revealed that existing technology, such as CN216009688U, describes a valve with a filtering function. This valve includes a valve body with an inlet pipe and an outlet pipe connected to its left and right sides. The inlet and outlet pipes are respectively equipped with an inlet flange and an outlet flange. The inner walls of the inlet and outlet flanges are respectively provided with a first mounting ring and a second mounting ring of identical structure. The first and second mounting rings are respectively equipped with a first mounting frame and a second mounting frame of identical installation method. A coarse filter screen is installed on the first mounting frame, and a fine filter screen is installed on the second mounting frame. Connecting bolts connect the inlet flange, the first mounting ring, and the first mounting frame. After prolonged use, workers can directly disassemble the connecting bolts to further separate the first mounting frame from the first mounting ring and the second mounting frame from the second mounting ring, thus enabling the removal of the coarse and fine filter screens for easy cleaning.

[0004] In summary, existing valves facilitate the cleaning of coarse and fine filter screens by staff, but they only serve to stop water flow and cannot prevent backflow. Therefore, a valve with an anti-backflow structure is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a valve with an anti-backflow structure to solve the problem mentioned in the background art that existing valves only serve to stop water flow and cannot prevent backflow.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a valve with an anti-backflow structure, including a valve seat, an upper valve body fixedly installed on the top of the valve seat, and a manual valve plate mechanism provided inside the upper valve body. A filter screen is installed inside the liquid inlet channel of the valve seat, and an anti-backflow mechanism is provided inside the liquid outlet channel of the valve seat. The anti-backflow mechanism includes a fixed box that matches the valve seat, with an inlet on one side of the fixed box and an outlet on the other side. An installation block is provided inside the fixed box, and a sealing plug that cooperates with the liquid inlet is installed on one side of the installation block. The other side of the installation block is connected to a fixed plate provided inside the fixed box through symmetrically arranged springs.

[0007] Preferably, the manual valve plate mechanism includes a handwheel, which can drive a screw mechanism installed inside the upper valve body to rotate. The screw mechanism is connected to a drive block, and the drive block is connected to a valve plate that is slidably installed inside the upper valve body through symmetrically arranged connecting rods.

[0008] The above technical solution facilitates the opening and closing of the valve.

[0009] Preferably, the valve seat has a sealing groove inside that cooperates with the valve plate.

[0010] The above technical solutions improve the sealing performance during closure.

[0011] Preferably, the valve seat has an impurity inlet on one side of the filter screen, and the impurity inlet is connected to the inside of the impurity collection box.

[0012] The above technical solution facilitates the collection of impurities.

[0013] Preferably, the bottom of the collection box is provided with an impurity outlet, and a matching sealing cap is installed on the impurity outlet.

[0014] The above technical solution facilitates the removal of impurities.

[0015] Preferably, the mounting block is connected to the slider by symmetrically arranged positioning rods on both sides, and the slider slides in the groove opened in the fixed box.

[0016] The above technical solutions improve stability during movement.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This valve with an anti-backflow structure solves the problem that existing valves only serve to stop water flow and cannot prevent backflow. It features an upper valve body fixedly installed on the top of the valve seat, with a manual valve plate mechanism inside. A filter screen is installed inside the valve seat's inlet channel, and an anti-backflow mechanism is installed inside the valve seat's outlet channel. The anti-backflow mechanism includes a fixed box that matches the valve seat, with an inlet on one side and an outlet on the other. An installation block is installed inside the fixed box, with a sealing plug on one side that works with the inlet. The other side of the installation block is connected to a fixed plate inside the fixed box via symmetrically arranged springs. Under the action of the springs, the sealing plug seals the inlet of the fixed box, thus preventing backflow. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall front cross-sectional structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the manual valve plate mechanism of this utility model;

[0020] Figure 3 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0021] Figure 4 This utility model Figure 1 Enlarged structural diagram at point B.

[0022] In the diagram: 1. Valve seat; 101. Sealing bottom groove; 102. Impurity inlet; 103. Impurity collection box; 104. Impurity outlet; 2. Upper valve body; 3. Manual valve plate mechanism; 301. Handwheel; 302. Screw mechanism; 303. Drive block; 304. Connecting rod; 305. Valve plate; 4. Filter screen; 5. Anti-backflow mechanism; 501. Fixing box; 502. Mounting block; 5021. Positioning rod; 5022. Slider; 503. Sealing plug; 504. Spring; 505. Fixing plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 This utility model provides a technical solution: a valve with an anti-backflow structure, wherein an upper valve body 2 is fixedly installed on the top of the valve seat 1, and a manual valve plate mechanism 3 is provided inside the upper valve body 2, a filter screen 4 is installed inside the liquid inlet channel of the valve seat 1, and an anti-backflow mechanism 5 is provided inside the liquid outlet channel of the valve seat 1.

[0025] Specifically, the manual valve plate mechanism 3 includes a handwheel 301, which can drive the screw mechanism 302 inside the upper valve body 2 to rotate. The screw mechanism 302 is connected to the drive block 303, and the drive block 303 is connected to the valve plate 305 that is slidably disposed inside the upper valve body 2 through symmetrically arranged connecting rods 304.

[0026] To further explain, the valve seat 1 has a sealing groove 101 inside that works with the valve plate 305. By setting the sealing groove 101, the sealing performance of the valve plate 305 when it is closed can be improved.

[0027] When the valve plate 305 needs to be closed, the handwheel 301 is rotated. Under the action of the handwheel 301, the screw mechanism 302 rotates, thereby driving the drive block 303 to move. The drive block 303 drives the valve plate 305 to move through the connecting rod 304, thereby driving the valve plate 305 to move down and cooperate with the sealing bottom groove 101 to close the valve.

[0028] Specifically, valve seat 1 is provided with impurity inlet 102 on one side of filter screen 4, and impurity inlet 102 is connected to the inside of impurity collection box 103. Impurity outlet 104 is provided at the bottom of impurity collection box 103, and a matching sealing cover is installed on impurity outlet 104. Impurities filtered out by filter screen 4 enter the inside of impurity collection box 103 for collection and storage under the action of gravity through impurity inlet 102.

[0029] Specifically, the anti-backflow mechanism 5 includes a fixed box 501 that matches the valve seat 1. The fixed box 501 has an inlet on one side and an outlet on the other side. The fixed box 501 is equipped with an installation block 502. A sealing plug 503 that works with the inlet is installed on one side of the installation block 502. The other side of the installation block 502 is connected to the fixed plate 505 inside the fixed box 501 through symmetrically arranged springs 504.

[0030] In a further embodiment, the mounting block 502 is connected to the slider 5022 by symmetrically arranged positioning rods 5021 on both sides, and the slider 5022 slides in the groove opened in the fixed box 501. The above arrangement can limit the movement direction of the mounting block 502.

[0031] When liquid enters the valve seat 1 through the inlet channel, the sealing plug 503 moves the mounting block 502 under the action of liquid pressure. At this time, the spring 504 is in a compressed state, and the liquid flows through the gap between the sealing plug 503 and the inlet of the fixed box 501. Under normal conditions, the sealing plug 503 seals the inlet of the fixed box 501 under the action of the spring 504, thereby preventing liquid backflow. At the same time, when liquid backflow occurs, the sealing plug 503 contacts the inlet of the fixed box 501 more tightly under the action of the backflowing liquid.

[0032] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A valve with an anti-backflow structure, comprising a valve seat (1), characterized in that: The valve seat (1) is fixedly mounted with an upper valve body (2), and the upper valve body (2) is provided with a manual valve plate mechanism (3). The valve seat (1) is provided with a filter screen (4) inside the liquid inlet channel, and the valve seat (1) is provided with an anti-backflow mechanism (5) inside the liquid outlet channel. The anti-backflow mechanism (5) includes a fixed box (501) that matches the valve seat (1). The fixed box (501) has an inlet on one side and an outlet on the other side. The fixed box (501) is provided with an installation block (502) inside, and a sealing plug (503) that works with the liquid inlet is installed on one side of the installation block (502). The other side of the installation block (502) is connected to the fixed plate (505) inside the fixed box (501) through symmetrically arranged springs (504).

2. A valve with an anti-backflow structure according to claim 1, characterized in that: The manual valve plate mechanism (3) includes a handwheel (301), and the handwheel (301) can drive the screw mechanism (302) inside the upper valve body (2) to rotate. The screw mechanism (302) is connected to the drive block (303), and the drive block (303) is connected to the valve plate (305) that is slidably arranged inside the upper valve body (2) through the symmetrically arranged connecting rods (304).

3. A valve with an anti-backflow structure according to claim 1, characterized in that: The valve seat (1) has a sealing groove (101) inside that is used in conjunction with the valve plate (305).

4. A valve with an anti-backflow structure according to claim 1, characterized in that: The valve seat (1) is located on one side of the filter screen (4) and has an impurity inlet (102), which is connected to the inside of the impurity collection box (103).

5. A valve with an anti-backflow structure according to claim 4, characterized in that: The bottom of the collection box (103) is provided with an impurity outlet (104), and a matching sealing cover is installed on the impurity outlet (104).

6. A valve with an anti-backflow structure according to claim 1, characterized in that: The mounting block (502) is connected to the slider (5022) by symmetrically arranged positioning rods (5021) on both sides, and the slider (5022) slides in the groove opened in the fixed box (501).

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