Start type check valve convenient to overhaul

Abstract

The utility model discloses a start-type check valve convenient to overhaul, and relates to the field of check valve devices. The starting type check valve convenient to overhaul comprises a check valve unit, the check valve unit comprises a check valve body and a valve deck arranged at the top of the check valve body, the check valve unit further comprises a vertical rod and a bottom plate which are arranged at the top of the valve deck, the vertical rod is used for moving the bottom plate, and the bottom plate is used for releasing pressure in the check valve body. An N-shaped rod for fixing the vertical rod penetrates through the top of the vertical rod; a transverse rod is arranged in the check valve body and used for limiting water flow of a water return opening in the check valve body. According to the start-type check valve convenient to overhaul, the vertical rod and the screw rod are arranged at the top of the valve cover, pressure in the check valve body can be released from the position between the screw hole in the valve cover and the vertical rod, the valve cover can be detached conveniently, meanwhile, the cross rod is arranged to block the water return opening, and the situation that fluid flows back and overflows is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of check valves, in particular to a lift-type check valve which is easy to repair. Background Art

[0002] A swing check valve, also known as a non-return valve, is an automatic valve used to prevent the backflow of media in a one-way flow pipeline. It relies on the pressure of the media flowing in the pipeline to open or close the valve. Swing check valves can be divided into three types: single-flap, double-flap and multi-flap. It is one of the more commonly used valves. A swing check valve only allows the media to flow in one direction, which can effectively prevent the backflow of the media to prevent accidents such as water leakage.

[0003] At present, there is a problem that the internal pressure of the swing check valve is relatively high, which will cause the tightness between the valve cover and the valve body to be strong, making it difficult to remove the valve cover, and the fluid in the pipeline is easy to flow back when inspecting the parts inside the valve;

[0004] The reason for this problem is that the swing check valve needs to be regularly inspected and maintained when in use. Since the current swing check valve forms a closed space with the fluid inside when in use, the pressure inside the swing check valve is relatively high. Therefore, when removing the valve cover, the tightness between the valve cover and the valve body is relatively strong, which makes it difficult to remove the valve cover. Secondly, when inspecting the parts inside the check valve, the fluid in the pipeline is easy to flow back from the return water port in the check valve, which can easily wash away some of the loosened parts. In view of the shortcomings of the existing technology, we propose a swing check valve that is easy to inspect to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a swing check valve that is easy to maintain, which solves the problem that the pressure inside the current swing check valve is relatively high, which leads to a strong tightness between the valve cover and the valve body, making it difficult to remove the valve cover, and the fluid in the pipeline is easy to flow back when the parts inside the valve are maintained.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a lift-type check valve that is easy to repair, including a check valve unit, the check valve unit includes a check valve body and a valve cover arranged on the top of the check valve body, and the check valve unit also includes a pressure reducing unit and a limiting unit;

[0007] The decompression unit includes a vertical rod and a bottom plate arranged on the top of the valve cover, the vertical rod is used to move the bottom plate, the bottom plate is used to release the pressure inside the check valve body, and an N-shaped rod penetrates the top of the vertical rod, and the N-shaped rod is used to fix the vertical rod;

[0008] The limiting unit comprises a cross bar arranged inside the check valve body, and the cross bar is used to limit the water flow of the water return port inside the check valve body.

[0009] Preferably, a screw hole is formed on the top of the valve cover, a screw rod is fixedly connected to the bottom of the vertical rod, and the screw rod is threadedly connected to the inside of the screw hole.

[0010] Preferably, the bottom plate is fixedly connected to the bottom of the screw rod, the bottom plate is installed on the bottom of the valve cover, and the bottom plate is used to limit the screw hole.

[0011] Preferably, a rubber ring is fixedly connected to the top of the bottom plate, and the rubber ring is arranged between the bottom plate and the valve cover, and the rubber ring is used to increase the tightness between the bottom plate and the valve cover.

[0012] Preferably, the cross bar is inserted into the inside of the check valve body, and a bushing is fixedly connected to the outer peripheral wall of the cross bar, and the bushing is used to increase the tightness of the cross bar.

[0013] Preferably, the N-shaped rod is inserted into the top of the valve cover, and a spring is sleeved on the outer peripheral wall of the N-shaped rod, and the spring is fixedly connected between the N-shaped rod and the vertical rod.

[0014] Preferably, a clamping plate is fixedly connected inside the check valve body, a rocker arm is threadedly fixed to the top of the clamping plate, a valve flap is fixedly connected to the bottom side of the rocker arm, and the valve flap is arranged inside the check valve body.

[0015] The utility model discloses a lift-type check valve which is easy to maintain, and has the following beneficial effects: the lift-type check valve which is easy to maintain, by arranging a vertical rod, a screw rod and a bottom plate on the top of a valve cover on a check valve body, by rotating the vertical rod and the screw rod, the pressure in the check valve body can be released from between the screw hole on the valve cover and the vertical rod, the pressure in the check valve body can be reduced, and the valve cover can be easily disassembled; at the same time, by arranging a cross rod, the water return port in the check valve body can be blocked by plugging the cross rod, thereby avoiding the situation that the fluid flows back from the water return port and overflows from the check valve body during maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the main body of the check valve of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the valve cover of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the bottom plate of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the bushing of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the N-shaped rod of the utility model.

[0021] In the figure: 1. check valve body; 2. valve cover; 201. screw hole; 3. vertical rod; 301. screw rod; 302. bottom plate; 303. rubber ring; 304. N-shaped rod; 305. spring; 4. clamping plate; 401. valve disc; 402. rocker arm; 5. cross bar; 501. bushing. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The embodiment of the present application solves the problem that the pressure inside the swing check valve is relatively high, which causes the tightness between the valve cover and the valve body to be strong, making it difficult to remove the valve cover, and the fluid in the pipeline is prone to backflow when inspecting the parts inside the valve.

[0024] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] The utility model embodiment discloses a lift-type check valve which is easy to repair.

[0026] According to the attached Figure 1-5 As shown, a lift-type check valve that is easy to repair includes a check valve unit, the check valve unit includes a check valve body 1 and a valve cover 2 arranged on the top of the check valve body 1, and the check valve unit also includes a pressure reducing unit and a limiting unit;

[0027] The pressure reducing unit comprises a vertical rod 3 and a bottom plate 302 arranged on the top of the valve cover 2. The vertical rod 3 is used to move the bottom plate 302. The bottom plate 302 is used to release the pressure inside the check valve body 1. An N-shaped rod 304 runs through the top of the vertical rod 3. The N-shaped rod 304 is used to further fix the vertical rod 3 to prevent the vertical rod 3 from rotating at will.

[0028] The limiting unit includes a cross bar 5 arranged inside the check valve body 1 , and the cross bar 5 is used to limit the water flow of the water return port inside the check valve body 1 .

[0029] A screw hole 201 is provided on the top of the valve cover 2, and a screw rod 301 is fixedly connected to the bottom of the vertical rod 3. The screw rod 301 is threadedly connected to the inside of the screw hole 201. By rotating the vertical rod 3 downward, the screw rod 301 will be driven to rotate downward inside the screw hole 201 until the screw rod 301 rotates out of the screw hole 201. At this time, a gap will appear between the vertical rod 3 and the screw hole 201, and the pressure in the check valve body 1 will be released from the gap, thereby avoiding the situation where the pressure in the check valve body 1 is too high, which will cause the valve cover 2 to be tightly adsorbed on the top of the check valve body 1, making it inconvenient to disassemble.

[0030] The bottom plate 302 is fixedly connected to the bottom of the screw rod 301 . The bottom plate 302 is installed at the bottom of the valve cover 2 . The bottom plate 302 is used to define the screw hole 201 .

[0031] A rubber ring 303 is fixedly connected to the top of the bottom plate 302. The rubber ring 303 is arranged between the bottom plate 302 and the valve cover 2. The rubber ring 303 is used to increase the tightness of the bottom plate 302 and the valve cover 2. By rotating the vertical rod 3 and the screw rod 301 upward, the bottom plate 302 and the rubber ring 303 will be driven to move upward until the bottom plate 302 is pressed against the bottom of the valve cover 2. At this time, the bottom plate 302 will limit and block the screw hole 201, so that the check valve body 1 is sealed, thereby preventing the water inside the check valve body 1 from overflowing through the screw hole 201.

[0032] The cross bar 5 is inserted into the inside of the check valve body 1, and the outer peripheral wall of the cross bar 5 is fixedly connected with a bushing 501. The bushing 501 is used to increase the tightness of the cross bar 5. When inspecting the components inside the check valve body 1, the tool cross bar 5 is inserted into the return water port of the check valve body 1 to avoid water backflow.

[0033] The N-shaped rod 304 is inserted into the top of the valve cover 2, and the outer peripheral wall of the N-shaped rod 304 is sleeved with a spring 305. The spring 305 is fixedly connected between the N-shaped rod 304 and the vertical rod 3. By pulling the N-shaped rod 304 upward to make it slide out of the top of the valve cover 2, the vertical rod 3 can be rotated at this time, and the pulling force of the spring 305 can reset the N-shaped rod 304, and the N-shaped rod 304 will be inserted into the top of the valve cover 2 to fix the vertical rod 3.

[0034] The inside of the check valve body 1 is fixedly connected to a card plate 4, the top of the card plate 4 is threadedly fixed with a rocker arm 402, the bottom side of the rocker arm 402 is fixedly connected to a valve flap 401, and the valve flap 401 is arranged inside the check valve body 1. When the fluid flows in from the inlet of the check valve body 1 (from left to right), the valve inlet pressure is higher than the outlet pressure. At this time, the valve flap 401 is pushed away from the valve seat at the inlet of the check valve body 1, so that the valve is in an open state; when the pressure difference on both sides of the valve flap 401 is reduced to a certain level, the valve flap 401 will fall again and return to a closed state.

[0035] When the utility model is in use, first close the valve at the upstream of the check valve body 1, and then rotate the vertical rod 3 downward, the vertical rod 3 will drive the screw 301 to rotate downward inside the screw hole 201, until the screw 301 rotates out of the screw hole 201, the pressure in the check valve body 1 will be released from the hole between the vertical rod 3 and the screw hole 201, at this time the valve cover 2 can be removed, and then the tool cross bar 5 is inserted and blocked at the return water port in the check valve body 1, at this time the valve disc 401 and the rocker arm 402 and other components can be inspected and repaired in turn.

[0036] In summary, compared with the prior art, the present invention has the following beneficial effects: by arranging the vertical rod 3, the screw 301 and the bottom plate 302 on the top of the valve cover 2 on the check valve body 1, by rotating the vertical rod 3 and the screw 301, the pressure in the check valve body 1 can be released from between the screw hole 201 on the valve cover 2 and the vertical rod 3, thereby reducing the pressure in the check valve body 1 and facilitating the disassembly of the valve cover 2; at the same time, by arranging the cross rod 5, the return water port in the check valve body 1 can be blocked by plugging the cross rod 5, thereby avoiding the situation in which the fluid flows back from the return water port and overflows the check valve body 1 during maintenance.

[0037] The above shows and describes the basic principle and main features of the utility model and the 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 claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A lift-type check valve that is easy to repair, comprising a check valve unit, the check valve unit comprising a check valve body (1) and a valve cover (2) arranged on the top of the check valve body (1), characterized in that: The check valve unit also includes a pressure reducing unit and a limiting unit; The pressure reducing unit comprises a vertical rod (3) and a bottom plate (302) arranged on the top of the valve cover (2); the vertical rod (3) is used to move the bottom plate (302); the bottom plate (302) is used to release the pressure inside the check valve body (1); an N-shaped rod (304) penetrates the top of the vertical rod (3); the N-shaped rod (304) is used to fix the vertical rod (3); The limiting unit comprises a cross bar (5) arranged inside the check valve body (1), and the cross bar (5) is used to limit the water flow of the water return port inside the check valve body (1).

2. The easy-to-maintain check valve according to claim 1 is characterized in that: The top of the valve cover (2) is provided with a screw hole (201), the bottom of the vertical rod (3) is fixedly connected with a screw rod (301), and the screw rod (301) is threadedly connected inside the screw hole (201).

3. The easy-to-maintain lift check valve according to claim 1 is characterized in that: The bottom plate (302) is fixedly connected to the bottom of the screw rod (301), the bottom plate (302) is installed at the bottom of the valve cover (2), and the bottom plate (302) is used to limit the screw hole (201).

4. The easy-to-maintain lift check valve according to claim 1 is characterized in that: A rubber ring (303) is fixedly connected to the top of the bottom plate (302). The rubber ring (303) is arranged between the bottom plate (302) and the valve cover (2). The rubber ring (303) is used to increase the tightness between the bottom plate (302) and the valve cover (2).

5. The easy-to-maintain lift check valve according to claim 1 is characterized in that: The cross bar (5) is inserted into the inside of the check valve body (1), and a bushing (501) is fixedly connected to the outer peripheral wall of the cross bar (5), and the bushing (501) is used to increase the tightness of the cross bar (5).

6. The easy-to-maintain lift check valve according to claim 1, characterized in that: The N-shaped rod (304) is inserted into the top of the valve cover (2), the outer peripheral wall of the N-shaped rod (304) is sleeved with a spring (305), and the spring (305) is fixedly connected between the N-shaped rod (304) and the vertical rod (3).

7. The easy-to-maintain lift check valve according to claim 6, characterized in that: The inside of the check valve body (1) is fixedly connected to a clamping plate (4), the top of the clamping plate (4) is threadedly fixed with a rocker arm (402), the bottom side of the rocker arm (402) is fixedly connected to a valve flap (401), and the valve flap (401) is arranged inside the check valve body (1).

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