quick check valve

Abstract

This quick-acting check valve has two ends of its body for connecting to the feed pipe. One end of the valve body contains a guide rod, on which a left and right valve disc are fitted. The back of each valve disc has a connecting part. A screw is located inside the valve body, with one end extending out of the valve body. The screw inside the valve body is divided into upper and lower sections. The upper section has clockwise threads, and the lower section has counterclockwise threads. A sleeve is fitted on the upper section, and another sleeve is fitted on the lower section. One sleeve is movably connected to one end of a connecting rod, and the other end of this connecting rod is movably connected to the connecting part on the back of the right valve disc, driving the right valve disc to open and close. The other sleeve is movably connected to one end of another connecting rod, and the other end of this connecting rod is movably connected to the connecting part on the back of the left valve disc, driving the left valve disc to open and close. The left and right valve discs are used to open and close one end of the valve body. Advantages include: good sealing due to the connecting rod, rapid response, and improved sealing due to the beveled design.

Description

Technical Field

[0001] This invention patent relates to a quick check valve. Background Technology

[0002] A check valve is a type of valve whose opening and closing element is a circular valve disc that relies on its own weight and the pressure of the medium to prevent backflow. It belongs to the category of automatic valves and is also known as a non-return valve, one-way valve, reflux valve, or isolation valve. The valve disc movement is divided into lift type and swing type. The lift type check valve is structurally similar to a gate valve, except that it lacks a valve stem to drive the valve disc. The medium flows in from the inlet end (bottom) and flows out from the outlet end (top). Existing check valves have sealing problems and are structurally complex, with poor front-end sealing. Summary of the Invention

[0003] The purpose of this invention is to solve the existing technical problems by proposing a fast check valve.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a quick check valve, comprising a valve body, a screw, a connecting rod, a guide rod, a left valve disc, and a right valve disc. Both ends of the valve body are used to connect to a feed pipe. A guide rod is provided inside one end of the valve body, and the left and right valve discs are sleeved on the guide rod. Connecting portions are provided on the back sides of the left and right valve discs. A screw is provided inside the valve body, with one end extending out of the valve body. The screw inside the valve body is divided into upper and lower parts. The upper part has clockwise threads, and the lower part has counterclockwise threads. A sleeve is sleeved on the upper part, and another sleeve is sleeved on the lower part. One sleeve is movably connected to one end of a connecting rod, and the other end of the connecting rod is movably connected to the connecting portion on the back side of the right valve disc, driving the right valve disc to open and close. The other sleeve is movably connected to one end of another connecting rod, and the other end of the connecting rod is movably connected to the connecting portion on the back side of the left valve disc, driving the left valve disc to open and close. The left and right valve discs are used to open and close one end of the valve body.

[0005] Furthermore, the inner walls of one sleeve and the other sleeve are threaded to engage with the threads on the corresponding screw.

[0006] Furthermore, the opposing surfaces of the left and right valve discs are fitted onto the guide rod.

[0007] Furthermore, two first sleeves are provided on the opposite surface of the left valve disc, and two second sleeves are provided on the opposite surface of the right valve disc, with the first and second sleeves movably sleeved on the guide rod and staggered.

[0008] Furthermore, the guide rod is fixedly installed inside the valve body, while the screw is rotatably installed inside the valve body, with the upper end of the screw providing a movable seal to the upper end of the valve body.

[0009] Furthermore, a sealing plate is provided at one end of the valve body, and two hollowed-out holes are formed on the sealing plate. The two hollowed-out holes correspond to the left and right valve discs and are smaller than the outer edges of the left and right valve discs.

[0010] Furthermore, rubber sealing rings are provided on the two hollowed-out surfaces that fit together on the left and right sides of the valve disc.

[0011] Furthermore, the connecting rod has ball heads at both ends, which fit into the corresponding sleeves and connecting parts respectively.

[0012] Furthermore, the left and right sides of the sealing plate are outward-facing slopes, with hollowed-out sections formed on the slopes.

[0013] Furthermore, the back of the two sleeves is provided with round holes, through which a positioning pin set in the valve body passes to limit the two sleeves and prevent rotation.

[0014] The beneficial effects of this invention are: the connecting rod provides good sealing and a rapid response, and the inclined surface provides even better sealing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure.

[0016] Figure 2 This is a schematic diagram of the left and right valve discs.

[0017] Figure 3 This is a cross-sectional view of the left and right valve discs in the closed state.

[0018] Figure 4 This is a cross-sectional view of the left and right valve discs in their open states.

[0019] Figure 5 This is a schematic diagram of two structures of the sleeve. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Example 1 combined with appendix Figure 1-5A quick-acting check valve includes a valve body 1, a screw 2, a connecting rod 3, a guide rod 4, a left valve disc 5, and a right valve disc 6. Both ends of the valve body 1 are used to connect to a feed pipe. A guide rod 4 is located inside one end of the valve body, on which the left and right valve discs are fitted. Connecting parts 5 are located on the back of the left and right valve discs. A screw 2 is located inside the valve body, with one end extending out of the valve body. The screw inside the valve body is divided into upper and lower parts. The upper part has clockwise threads, and the lower part has counterclockwise threads. A sleeve 7 is fitted on the upper part, and another sleeve 8 is fitted on the lower part. One sleeve is movably connected to one end of a connecting rod, and the other end of the connecting rod is movably connected to the connecting part on the back of the right valve disc, driving the right valve disc to open and close. The other sleeve is movably connected to one end of another connecting rod, and the other end of the connecting rod is movably connected to the connecting part on the back of the left valve disc, driving the left valve disc to open and close. The left and right valve discs are used to open and close one end of the valve body. The structure is simple, with the upper end of the screw and the valve body providing a fixed and movable seal. The screw does not rise, improving sealing performance. The connecting rod drives the left and right valve discs to achieve better sealing.

[0022] The quick check valve has threads on the inner walls of one sleeve and the other sleeve, which mate with the threads on the corresponding screw.

[0023] The quick check valve has its left and right valve discs mounted on the guide rod.

[0024] The quick check valve has two first sleeves 9 arranged vertically on the opposite side of the left valve disc and two second sleeves 10 arranged vertically on the opposite side of the right valve disc. The first and second sleeves are movably sleeved on the guide rod and staggered.

[0025] The quick-return valve has a guide rod fixedly mounted inside the valve body, and a screw rotatably mounted inside the valve body, with the upper end of the screw providing a movable seal to the upper end of the valve body. A rotating head 17 is located at the upper end of the screw.

[0026] The quick-acting check valve has a sealing plate 11 at one end of the valve body. Two perforations 12 are formed on the sealing plate, positioned to the left and right of the valve disc, respectively. These perforations are smaller than the outer edges of the left and right valve discs, thus improving sealing performance.

[0027] The quick-acting check valve features rubber sealing rings 13 on the two perforated surfaces of the left and right valve discs, further enhancing sealing performance.

[0028] The quick-acting check valve features ball-shaped ends on the connecting rod, which fit into corresponding sleeves and connectors. This design increases the range of motion of the connecting rod and prevents jamming.

[0029] The quick-acting check valve features outward-facing bevels on both sides of the sealing plate, with perforations formed on these bevels. These bevels ensure a closer fit with the left and right valve discs driven by the connecting rod.

[0030] The quick-acting check valve has two sleeves with round holes 14 on their backs. A positioning pin 15, located within the valve body, passes through these holes to limit rotation of the two sleeves. This further positions the sleeves to prevent slight rotation.

[0031] The quick-release check valve features a tenon-and-mortise structure 16 at the opposite ends of the two sleeves, allowing for vertical insertion and connection. This allows for closer proximity to the centerline, resulting in more complete opening and closing of the left and right valve discs.

[0032] A quick check valve with a rotating head 17 at the upper end of the screw.

[0033] A quick check valve uses a screw to bring two sleeves together or separate them, allowing the left and right valve discs to be closed and opened respectively.

[0034] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A quick-return check valve, comprising a valve body, a screw, a connecting rod, a guide rod, a left valve disc, and a right valve disc, characterized in that: The valve body has two ends for connecting to the material pipe. One end of the valve body has a guide rod, on which a left valve disc and a right valve disc are fitted. The back of the left and right valve discs has a connecting part. The valve body has a screw, one end of which extends out of the valve body. The screw inside the valve body is divided into upper and lower parts. The upper part has a clockwise thread, and the lower part has a counterclockwise thread. The upper part is fitted with a sleeve, and the lower part is fitted with another sleeve. One sleeve is movably connected to one end of a connecting rod, and the other end of the connecting rod is movably connected to the connecting part on the back of the right valve disc to drive the right valve disc to open and close. The other sleeve is movably connected to one end of another connecting rod, and the other end of the connecting rod is movably connected to the connecting part on the back of the left valve disc to drive the left valve disc to open and close. The left and right valve discs are used to open and close one end of the valve body.

2. The quick check valve according to claim 1, characterized in that: The inner walls of one sleeve and the other sleeve are threaded to engage with the threads on the corresponding screw.

3. The quick-check valve of claim 1, wherein: The opposing surfaces of the left and right valve discs are fitted onto the guide rod.

4. The quick-check valve of claim 3, wherein: The left valve disc has two vertically distributed first sleeves on its opposite surface, and the right valve disc has two vertically distributed second sleeves on its opposite surface. The first and second sleeves are movably sleeved on the guide rod and staggered.

5. The quick-check valve of claim 4, wherein: The guide rod is fixedly installed in the valve body, while the screw is rotatably installed in the valve body, with the upper end of the screw providing a movable seal to the upper end of the valve body.

6. The quick-check valve of claim 5, wherein: A sealing plate is provided at one end of the valve body. Two hollowed-out holes are formed on the sealing plate, which correspond to the left and right valve discs and are smaller than the outer edges of the left and right valve discs.

7. The quick-check valve of claim 6, wherein: Rubber sealing rings are provided on the two hollowed-out surfaces that fit together on the left and right sides of the valve disc.

8. The quick check valve according to claim 1, characterized in that: The connecting rod has ball heads at both ends, which fit into the corresponding sleeves and connecting parts respectively.

9. The quick-check valve of claim 1, wherein: The sealing plate has outward-facing sloping surfaces on both the left and right sides, with hollowed-out areas formed on the sloping surfaces.

10. The quick-check valve of claim 1, wherein: The back of each of the two sleeves has a round hole, through which a positioning pin located inside the valve body passes to limit the movement of the two sleeves and prevent rotation.

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