A double-layer sealing lifting structure check valve

Abstract

The utility model relates to the technical field of valves, and provides a double-layer sealed lifting structure check valve with fast ice clearing and easy use, comprising a valve body and a closing block fitted in the inner cavity of the valve body, a lifting rod with a top outer wall slidingly connected to the inner cavity of the valve body is provided on the top of the closing block, a return spring is provided between the top of the lifting rod and the inner cavity of the valve body, an impact tube is penetrated and provided at the corresponding position of the closing block at the bottom of the valve body, and when the closing block is frozen, the impact tube is pulled to impact the closing block to shatter the frozen layer.

Description

Technical Field

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

[0002] A check valve is a valve whose opening and closing part is a circular disc and which blocks the backflow of the medium by its own weight and the pressure of the medium. The function of this type of valve is to allow the medium to flow in one direction only and prevent it from flowing in the opposite direction. Under the pressure of the fluid flowing in one direction, the disc opens; when the fluid flows in the opposite direction, the fluid pressure and the self-overlapping disc of the disc act on the valve seat, thereby cutting off the flow. It is widely used in water supply and drainage systems, high-rise construction pipelines and other places.

[0003] Although the above-mentioned prior art can solve the corresponding technical problems, it still has certain defects: when the existing check valve is used in a place with low temperature, if the check valve has not been opened to pass water for a long time, it is easy to cause the residual water between the edge of the check valve seal and the inner wall of the valve body to freeze, and then the check valve is firmly adhered to the valve body through condensed ice. When the check valve is opened and closed by water, it is difficult to prop open the check valve by the water flow pressure, which can easily cause the water flow through the pipeline to be blocked and needs to be disassembled for ice clearing, which is very inconvenient to use. Utility Model Content

[0004] The utility model aims to provide a double-layer sealing lifting structure check valve which is fast in ice clearing and convenient in use in view of the defects and shortcomings of the prior art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a double-layer sealed lifting structure check valve, including a valve body and a closing block fitted in the inner cavity of the valve body, a lifting rod with a top outer wall slidingly connected to the inner cavity of the valve body is provided on the top of the closing block, a return spring is provided between the top of the lifting rod and the inner cavity of the valve body, an impact tube is penetrated at the corresponding position of the closing block at the bottom of the valve body, when the closing block is frozen, the impact tube is pulled to impact the closing block to shatter the frozen layer.

[0006] A further improvement is that the impact tube includes a closed sliding tube that penetrates the bottom of the valve body and is located at a corresponding position of the closing block, and an upper punch block is arranged in the closed sliding tube. A limit block is provided on the inner wall of the closed sliding tube, and a compression spring is provided between the limit block and the upper punch block. A pull rod extending out of the closed sliding tube is also provided at the bottom of the upper punch block.

[0007] A further improvement is that the inner wall of the closed sliding tube is also provided with a plurality of sealing rings.

[0008] A further improvement is that a transverse handle is also provided at the bottom end of the pull rod.

[0009] A further improvement is that the upper punch block includes an impact block slidably arranged in the closed tube and a sliding cylinder arranged at the bottom of the impact block, the bottom of the sliding cylinder is provided with a limiting plate, and the bottom surface of the limiting plate is fixedly connected to the top end of the pull rod.

[0010] A further improvement is that an inertia plate is slidably arranged on the inner wall of the sliding cylinder.

[0011] A further improvement is that a plurality of convex balls are arranged on the top of the inertia plate.

[0012] After adopting the above technical scheme, the beneficial effect of the utility model is as follows: when the utility model is in use, if the closing block produces frozen ice and affects the opening and closing of the closing block, the pull rod of the impact tube can be pulled, so that the pull rod pulls the upper punch block down along the closed sliding tube and squeezes the compression spring, and then releases it to allow the elastic force of the compression spring to push the upper punch block to impact the closing block, so that the ice layer of the closing block is impacted and breaks and loosens with the shaking caused by the impact, thereby quickly destroying the condensed ice without disassembling the valve, thereby ensuring smooth water flow, fewer cleaning steps, and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 It is a structural schematic diagram of the front cross section of the check valve of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the impact tube of the utility model in front view;

[0016] Figure 3 It is a structural schematic diagram of the front cross section of the upper punch block of the utility model. DETAILED DESCRIPTION

[0017] The utility model is now further described in conjunction with the accompanying drawings and specific embodiments.

[0018] See also Figure 1-3As shown, the technical solution adopted in this specific embodiment is: a double-layer sealing lifting structure check valve, including a valve body 1 and a closing block 2 fitted in the inner cavity of the valve body 1, a lifting rod 4 with a top outer wall and a sliding connection between the inner cavity of the valve body 1 is provided on the top of the closing block 2, a return spring 3 is provided between the top of the lifting rod 4 and the inner cavity of the valve body 1, an impact tube 5 is penetrated at the corresponding position of the bottom of the valve body 1 at the closing block 2, and the impact tube 5 includes a closed sliding tube 51 penetrated and arranged at the corresponding position of the bottom of the valve body 1 at the closing block 2 and an upper punch block arranged in the closed sliding tube 51 54, the upper punch block 54 includes an impact block 32 slidably arranged in the closed tube 51 and a sliding tube 31 arranged at the bottom of the impact block 32, a limit plate 34 is arranged at the bottom of the sliding tube 31, and the bottom surface of the limit plate 34 is fixedly connected to the top of the pull rod 55, the inner wall of the closed sliding tube 51 is provided with a limit block 52, a compression spring 53 is arranged between the limit block 52 and the upper punch block 54, and a pull rod 55 extending out of the closed sliding tube 51 is also arranged at the bottom of the upper punch block 54. When the closed block 2 is frozen, the impact tube 5 is pulled to impact the closed block 2 to shatter the frozen layer. When in use, The valve body 1 is connected to the external pipe, and water is input through the external pipe to make the water pressure push up the closing block 2, so that the closing block 2 is pushed up and the lifting rod 4 is driven to squeeze the reset spring 3, so that a gap is generated between the closing block 2 and the valve body 1 to allow water to pass through. After the water flows through, the water pressure disappears, and the elastic force of the reset spring 3 squeezes the lifting rod 4, so that the closing block 2 re-closes the valve body 1 to prevent water from flowing back. When used in cold areas, if condensation occurs between the closing block 2 and the valve body 1 due to frozen water, the water pressure cannot push open the closing block 2, and the lifting rod 4 can be pulled. The pull rod 55 of the impact tube 5 drives the upper punch 54 to move downward along the closed sliding tube 51 to the limit block 52, and compresses the compression spring 53, so that the compression spring 53 generates elastic force, and then releases it, so that the elastic force of the compression spring 53 pushes the upper punch 54 back, so that the impact block 32 of the upper punch 54 moves upward quickly, and then hits the closed block 2, so that the ice layer of the closed block 2 is impacted and breaks and loosens with the shaking caused by the impact, so that the condensed ice can be quickly destroyed without disassembling the valve, thereby ensuring smooth water flow, fewer cleaning steps, and easy use;

[0019] The inner wall of the closed sliding tube 51 is also provided with a plurality of sealing rings 57. In this embodiment, only one sealing ring is provided, which is conducive to pressing the upper punch block 54 downward by water pressure to squeeze the sealing ring 57 when the water flows, thereby improving the sealing effect and preventing the valve from leaking.

[0020] The bottom end of the pull rod 55 is also provided with a transverse handle 56, which is conducive to making the pull-down more convenient and labor-saving;

[0021] An inertia plate 33 is slidably disposed on the inner wall of the sliding cylinder 31, which is conducive to the inertia plate 33 moving up and hitting the impact block 32 by inertia after the impact block 32 hits and stops, thereby causing the impact block 32 to generate a secondary shake, thereby enhancing the effect of clearing condensed ice;

[0022] The top of the inertia plate 33 is provided with a plurality of convex balls 35. In this embodiment, two convex balls 35 are provided, which is beneficial to increasing the impact force generated after the inertia plate 33 punches upward and makes the impact force more concentrated, thereby generating a stronger and more concentrated shaking.

[0023] Working principle of the utility model: When the utility model is used, the valve body 1 is connected to the external pipeline, and water flow is input through the external pipeline to make the water flow pressure push up the closing block 2, thereby pushing up the closing block 2 and synchronously driving the lifting rod 4 to squeeze the reset spring 3, thereby creating a gap between the closing block 2 and the valve body 1 to allow water to pass through. After the water flows through, the water pressure disappears, and the elastic force of the reset spring 3 squeezes the lifting rod 4, so that the closing block 2 re-closes the valve body 1 to prevent water from flowing back. When used in cold areas, if condensation occurs between the closing block 2 and the valve body 1 due to frozen water, the water pressure cannot push open the sealing block. The closing block 2 can be closed by pulling the pull rod 55 of the impact tube 5, thereby making the pull rod 55 drive the upper punch block 54 to move downward along the closed sliding tube 51 to the limit block 52, and squeeze the compression spring 53, so that the compression spring 53 generates elastic force, and then releases it, so that the elastic force of the compression spring 53 can push the upper punch block 54 back, so that the impact block 32 of the upper punch block 54 moves upward quickly, and then hits the closing block 2, thereby making the ice layer of the closing block 2 impacted and broken and loosened by the shaking generated by the impact, thereby quickly destroying the condensed ice without disassembling the valve, thereby ensuring smooth water flow, fewer cleaning steps, and easy use.

[0024] The utility model is intended to protect the structure of the product. The model of each component is not the content of the utility model, and it is also a known technology. Any component on the market that can achieve the above functions of the utility model can be used as a choice. Therefore, the model and other parameters of the component are not described in detail in this utility model. The contribution of this utility model lies in the scientific combination of various components.

[0025] The above shows and describes the basic principle and main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents. Anything not described in detail in the utility model is a well-known technology for those skilled in the art.

Claims

1. A double-layer sealing lifting structure check valve, comprising a valve body (1) and a closing block (2) arranged in close contact with the inner cavity of the valve body (1), a lifting rod (4) having a top outer wall slidably connected to the inner cavity of the valve body (1) is arranged on the top of the closing block (2), and a return spring (3) is arranged between the top end of the lifting rod (4) and the inner cavity of the valve body (1), characterized in that: An impact tube (5) is provided through the bottom of the valve body (1) at a position corresponding to the closing block (2). When the closing block (2) freezes, the impact tube (5) is pulled to impact the closing block (2) to break the frozen layer.

2. A double-layer sealing lifting structure check valve according to claim 1, characterized in that: The impact tube (5) comprises a closed sliding tube (51) penetrating the bottom of the valve body (1) at a corresponding position of the closed block (2) and an upper punch block (54) arranged in the closed sliding tube (51); a limit block (52) is arranged on the inner wall of the closed sliding tube (51); a compression spring (53) is arranged between the limit block (52) and the upper punch block (54); and a pull rod (55) extending out of the closed sliding tube (51) is also arranged at the bottom of the upper punch block (54).

3. A double-layer sealing lifting structure check valve according to claim 2, characterized in that: The inner wall of the closed sliding tube (51) is also provided with a plurality of sealing rings (57).

4. A double-layer sealing lifting structure check valve according to claim 2, characterized in that: The bottom end of the pull rod (55) is also provided with a transverse handle (56).

5. The double-layer sealing lifting structure check valve according to claim 2, characterized in that: The upper punch block (54) comprises an impact block (32) slidably arranged in a closed sliding tube (51) and a sliding cylinder (31) arranged at the bottom of the impact block (32). A limiting plate (34) is provided at the bottom of the sliding cylinder (31). The bottom surface of the limiting plate (34) is fixedly connected to the top end of the pull rod (55).

6. A double-layer sealing lifting structure check valve according to claim 5, characterized in that: An inertia plate (33) is slidably disposed on the inner wall of the sliding cylinder (31).

7. A double-layer sealing lifting structure check valve according to claim 6, characterized in that: A plurality of convex balls (35) are provided on the top of the inertia plate (33).

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