Double-flange check valve

Abstract

The utility model discloses a double flange check valve relates to check valve technical field, including the valve cylinder, be equipped with overload subassembly and buffer subassembly in the valve cylinder, the overload subassembly includes the fixed cylinder, the fixed cylinder is fixed in the valve cylinder, be equipped with the first baffle in the fixed cylinder, and the buffer subassembly is equipped with the buffer subassembly in the fixed cylinder. A first mounting cylinder is arranged above the first baffle, a first moving column is arranged above the first mounting cylinder, and a threaded rod is arranged above the first moving column. By means of the overload assembly, when the instant pressure of backflow liquid is too large, the valve clack is extruded, then the backflow liquid pushes the first baffle, the liquid enters the first baffle, pressure is shared by the liquid and the valve clack, and the valve clack is protected; the backflow water firstly impacts the buffer plate, the buffer plate weakens the impact force of the backflow liquid by utilizing the reaction of the spring, and the valve clack is protected.

Description

Technical Field

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

[0002] A check valve refers to a valve whose closing member is a circular valve flap and which blocks the reverse flow of the medium by its own weight and the action of the medium pressure. It belongs to the category of automatic valves and is also called a non-return valve, a one-way valve, a reflux valve or an isolation valve. The movement mode of the valve flap is divided into a lifting type and a swing type. The lifting check valve is similar in structure to a globe valve, only lacking the valve stem that drives the valve flap. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). When the inlet pressure is greater than the sum of the valve flap weight and its flow resistance, the valve is opened. Conversely, when the medium flows back, the valve closes. The swing check valve has an obliquely arranged valve flap that can rotate around an axis, and its working principle is similar to that of the lifting check valve. Check valves are commonly used as bottom valves for pumping devices to prevent the backflow of water. When used in combination with a globe valve, it can play a role in safety isolation. The disadvantages are large resistance and poor sealing performance when closed.

[0003] In the existing check valve, the lower part and the upper part of the valve body are fixed by welding to install the internal components of the valve body. However, the welding solution has a complex production process. Once there is a false weld, it is difficult to detect and it is impossible to repair. Therefore, a check valve that is convenient to assemble and has good sealing performance is needed.

[0004] In the existing patent (publication number: CN219796218U), a double-flange check valve includes a valve body. The two ends in the length direction of the valve body are connected by a first flange and a second flange. The valve seat is installed in the movable cavity through the installation port. The valve flap is installed on the support ring, and the support ring is installed in the movable cavity through the installation port. At the same time, the support ring positions and fixes the valve seat. The valve cover is connected to the installation port by studs, and the seal between the valve cover and the installation port is achieved through a first sealing structure. The seal between the valve seat and the water inlet is achieved through a second sealing structure, which has the advantages of convenient installation and good sealing effect.

[0005] However, the above technical solution still has certain deficiencies. It does not have the function of protecting the valve flap. When the reflux liquid impacts the valve flap, it accelerates the damage of the valve flap. At the same time, when the pressure of the liquid reflux is too high, it squeezes the valve flap, aggravating the damage of the valve flap. Content of the Utility Model

[0006] Based on this, the purpose of the present utility model is to provide a double-flange check valve to solve the technical problem of the shortened service life of the valve flap due to the impact force in the above background.

[0007] To achieve the above object, the present utility model provides the following technical solutions: a double-flange check valve, including a valve barrel, an overload component and a buffer component are arranged inside the valve barrel, the overload component includes a fixed barrel, the fixed barrel is fixedly installed inside the valve barrel, a first baffle is arranged inside the fixed barrel, a first mounting barrel is arranged above the first baffle, a first moving column is arranged above the first mounting barrel, a threaded rod is arranged above the first moving column, a second baffle and a limiting ring are arranged on the outer wall of the threaded rod, a connecting column is arranged above the limiting ring, and the connecting column extends to the outer wall of the fixed barrel and is connected to a pressing plate.

[0008] As a preferred technical solution of the double-flange check valve of the present utility model, the first baffle is fixedly connected to the first mounting barrel, and both sides of the first baffle are slidably installed on the inner wall of the fixed barrel through sliders, and sliding grooves matching the sliders are opened on the inner wall of the fixed barrel.

[0009] As a preferred technical solution of the double-flange check valve of the present utility model, the first moving column is slidably installed inside the first mounting barrel, and the first moving column and the first mounting barrel are cross-connected, the second baffle is threadedly sleeved on the outer wall of the threaded rod, one end of the threaded rod is rotatably connected to the first moving column, and the other end of the threaded rod extends to the outer wall of the fixed barrel and is connected to a rotary handle.

[0010] As a preferred technical solution of the double-flange check valve of the present utility model, a spring is arranged between the second baffle and the first baffle, and both sides of the second baffle are slidably installed on the inner wall of the fixed barrel through sliders, the limiting ring is fixedly connected to the connecting column, and a spring is arranged between one side of the limiting ring and the inner wall of the fixed barrel.

[0011] As a preferred technical solution of the double-flange check valve of the present utility model, sawteeth are fixed on the inner wall of the limiting ring, sawteeth are fixed on the outer wall of the threaded rod, and the sawteeth on the outer wall of the threaded rod are engaged with the sawteeth on the inner wall of the limiting ring.

[0012] As a preferred technical solution of the double-flange check valve of the present utility model, the buffer component includes a second mounting barrel, a push rod is slidably installed inside the second mounting barrel, one end of the push rod is fixedly connected to a sealing disc, a third mounting barrel is arranged on one side of the sealing disc, a second moving column is slidably installed inside the third mounting barrel, and one end of the second moving column is connected to a buffer plate.

[0013] As a preferred technical solution of the double-flange check valve of the present utility model, a spring is arranged between one side of the second moving column and the inner wall of the third mounting barrel, a spring is arranged between the inner wall of the second mounting barrel and the push rod, and the second mounting barrel is fixedly installed on the inner wall of the valve barrel through a mounting bracket.

[0014] In summary, the present utility model mainly has the following beneficial effects:

[0015] Through the overload component provided in the utility model, when the instantaneous pressure of the reflux liquid is too high, the valve flap is squeezed, and then the reflux liquid pushes the first baffle. The liquid enters the inside of the first baffle and shares the pressure with the valve flap to protect the valve flap. The buffer component is provided. When the reflux liquid continuously impacts the valve flap, the reflux water first impacts the buffer plate, and the buffer plate uses the reaction of the spring to weaken the impact force of the reflux liquid and protect the valve flap. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the front view of the utility model;

[0017] Figure 2 is the internal structure diagram of the valve barrel of the utility model;

[0018] Figure 3 is the front sectional view of the utility model;

[0019] Figure 4 is the internal structure diagram of the fixed cylinder of the utility model;

[0020] Figure 5 is the front sectional view of the fixed cylinder of the utility model;

[0021] Figure 6 is the front sectional view of the third installation cylinder of the utility model.

[0022] In the figure: 1. Valve barrel; 2. Fixed cylinder; 210. First baffle; 220. First installation cylinder; 230. First moving column; 240. Threaded rod; 250. Second baffle; 260. Limiting ring; 270. Connecting column; 280. Pressing plate; 290. Rotating handle; 310. Second installation cylinder; 320. Installation frame; 330. Push rod; 340. Sealing disc; 350. Buffer plate; 360. Third installation cylinder; 370. Second moving column. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as limiting the present utility model.

[0024] Next, the embodiments of the present utility model will be described according to the overall structure of the present utility model.

[0025] Double-flange check valve, such as Figure 1-6As shown, it includes a valve cylinder 1, an overload component and a buffer component are provided inside the valve cylinder 1, and the overload component includes a fixed cylinder 2, the fixed cylinder 2 is fixedly installed inside the valve cylinder 1, a first baffle 210 is provided inside the fixed cylinder 2, a first mounting cylinder 220 is provided above the first baffle 210, a first movable column 230 is provided above the first mounting cylinder 220, a threaded rod 240 is provided above the first movable column 230, a second baffle 250 and a limiting ring 260 are provided on the outer wall of the threaded rod 240, a connecting column 270 is provided above the limiting ring 260, the connecting column 270 extends to the outer wall of the fixed cylinder 2 and is connected to the pressure plate 280, the first baffle 210 is fixedly connected to the first mounting cylinder 220, and the first baffle 210 is slidably installed on the inner wall of the fixed cylinder 2 on both sides by sliders, and the inner wall of the fixed cylinder 2 is provided with a sliding groove matching the slider. The movable column 230 is slidably installed inside the first mounting cylinder 220, and the first movable column 230 and the first mounting cylinder 220 are cross-connected. The second baffle 250 is threadedly sleeved on the outer wall of the threaded rod 240, and one end of the threaded rod 240 is rotatably connected to the first movable column 230. The other end of the threaded rod 240 extends to the outer wall of the fixed cylinder 2 and is connected to the turning handle 290. A spring is provided between the second baffle 250 and the first baffle 210, and both sides of the second baffle 250 are slidably installed on the inner wall of the fixed cylinder 2 through sliders. The limit ring 260 is fixedly connected to the connecting column 270, and a spring is provided between one side of the limit ring 260 and the inner wall of the fixed cylinder 2. The inner wall of the limit ring 260 is fixed with serrations, and the outer wall of the threaded rod 240 is fixed with serrations, and the serrations on the outer wall of the threaded rod 240 are engaged with the serrations on the inner wall of the limit ring 260.

[0026] When the instantaneous pressure of the backflowing water is too high, the water flow squeezes the first baffle 210 upward, and the spring between the first baffle 210 and the second baffle 250 is compressed, and the reaction force of the spring pushes the water flow downward. When the instantaneous pressure is too high, the water flow can be upward, reducing the pressure on the valve disc, extending the service life of the valve disc, pushing the pressure plate 280 downward, driving the connecting rod and the limit plate downward, so that the serrations on the inner wall of the limit plate are disengaged from the serrations on the outer wall of the threaded rod 240, and then rotating the handle 290 to drive the second baffle 250 downward or move downward, compressing or releasing the spring, thereby adjusting the pressure of the liquid returning into the fixed cylinder 2.

[0027] Please refer to Figure 2 、 Figure 3 and Figure 6, the buffer assembly includes a second mounting cylinder 310. A push rod 330 is slidably mounted inside the second mounting cylinder 310. One end of the push rod 330 is fixedly connected to a sealing disc 340. A third mounting cylinder 360 is provided on one side of the sealing disc 340. A second moving column 370 is slidably mounted inside the third mounting cylinder 360. One end of the second moving column 370 is connected to a buffer plate 350. A spring is provided between one side of the second moving column 370 and the inner wall of the third mounting cylinder 360. A spring is provided between the inner wall of the second mounting cylinder 310 and the push rod 330. And the second mounting cylinder 310 is fixedly mounted on the inner wall of the valve cylinder 1 through a mounting frame 320.

[0028] When the reflux water impacts the buffer plate 350, the buffer plate 350 moves to one side, pushing the second moving column 370 to move inward, squeezing the spring. Through the reaction force of the spring, the impact force of the water flow is weakened, preventing the reflux liquid from impacting the valve flap and causing damage to the valve flap.

[0029] During use, when the instantaneous pressure of the reflux water is too high, the water flow squeezes the first baffle 210 upward. Through the compression of the spring between the first baffle 210 and the second baffle 250, the reaction force of the spring pushes the water flow downward. When the instantaneous pressure is too high, the water flow can be made to move upward to relieve the pressure on the valve flap and extend the service life of the valve flap. Push the pressing plate 280 downward, driving the connecting rod and the limiting plate downward, so that the serrations on the inner wall of the limiting plate disengage from the serrations on the outer wall of the threaded rod 240. Then rotate the turning handle 290 to drive the second baffle 250 to move downward or upward, compressing or releasing the spring, thereby adjusting the pressure of the liquid reflux entering the fixed cylinder 2. When the reflux water impacts the buffer plate 350, the buffer plate 350 moves to one side, pushing the second moving column 370 to move inward, squeezing the spring. Through the reaction force of the spring, the impact force of the water flow is weakened, preventing the reflux liquid from impacting the valve flap and causing damage to the valve flap.

[0030] Although the embodiments of the present invention have been shown and described, the specific embodiments are only explanations of the present invention and are not limitations of the present invention. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions and variations without creative contributions to the embodiments according to needs, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. Double flange check valve, comprising a valve barrel (1), characterized in that: An overload component and a buffer component are arranged inside the valve barrel (1); The overload component includes a fixed barrel (2), the fixed barrel (2) is fixedly installed inside the valve barrel (1), a first baffle (210) is arranged inside the fixed barrel (2), a first installation barrel (220) is arranged above the first baffle (210), a first moving column (230) is arranged above the first installation barrel (220), a threaded rod (240) is arranged above the first moving column (230), a second baffle (250) and a limit ring (260) are arranged on the outer wall of the threaded rod (240), a connecting column (270) is arranged above the limit ring (260), and the connecting column (270) extends to the outer wall of the fixed barrel (2) and is connected to a pressing plate (280).

2. The double-flange check valve according to claim 1, characterized in that: The first baffle (210) is fixedly connected to the first installation barrel (220), and both sides of the first baffle (210) are slidably installed on the inner wall of the fixed barrel (2) through sliders, and sliding grooves matching the sliders are formed on the inner wall of the fixed barrel (2).

3. The double-flange check valve according to claim 1, wherein: The first moving column (230) is slidably installed inside the first installation barrel (220), and the first moving column (230) is cross-connected with the first installation barrel (220). The second baffle (250) is threadedly sleeved on the outer wall of the threaded rod (240). One end of the threaded rod (240) is rotatably connected to the first moving column (230), and the other end of the threaded rod (240) extends to the outer wall of the fixed barrel (2) and is connected to a turning handle (290).

4. The double-flange check valve according to claim 1, characterized in that: A spring is arranged between the second baffle (250) and the first baffle (210), and both sides of the second baffle (250) are slidably installed on the inner wall of the fixed barrel (2) through sliders. The limit ring (260) is fixedly connected to the connecting column (270), and a spring is arranged between one side of the limit ring (260) and the inner wall of the fixed barrel (2).

5. The double-flange check valve according to claim 1, characterized in that: Sawteeth are fixed on the inner wall of the limit ring (260), sawteeth are fixed on the outer wall of the threaded rod (240), and the sawteeth on the outer wall of the threaded rod (240) are engaged with the sawteeth on the inner wall of the limit ring (260).

6. The double-flange check valve according to claim 1, wherein: The buffer component includes a second installation barrel (310), a push rod (330) is slidably installed inside the second installation barrel (310), one end of the push rod (330) is fixedly connected to a sealing disc (340), a third installation barrel (360) is arranged on one side of the sealing disc (340), a second moving column (370) is slidably installed inside the third installation barrel (360), and one end of the second moving column (370) is connected to a buffer plate (350).

7. The double-flange check valve according to claim 6, wherein: A spring is arranged between one side of the second moving column (370) and the inner wall of the third installation barrel (360), a spring is arranged between the inner wall of the second installation barrel (310) and the push rod (330), and the second installation barrel (310) is fixedly installed on the inner wall of the valve barrel (1) through a mounting bracket (320).

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