Check valve capable of adjusting opening angle and using method

Abstract

The invention discloses a check valve with an adjustable opening angle and a using method, the check valve comprises a valve body, a valve cover and a valve clack, a corner part protruding downwards is formed at the bottom of the valve body, the corner part is provided with a plane directly facing the valve clack, and a sleeve with one end extending towards the valve clack and the other end located outside the valve body is arranged on the plane in a penetrating mode. A sleeve is arranged in the valve body, a sliding block is arranged in the sleeve in a sliding fit mode, one end of the sliding block extends out of the other end of the sleeve, an open groove is formed in the upper surface, located in the valve body, of the sleeve in the axial direction, fins extending out of the open groove are fixedly connected to the upper surface of the sliding block, and stopping rods extending outwards are fixedly connected to the two sides of the fins. Two swing rods are hinged to the portions, on the two sides of the open groove, of the sleeve through torsional springs, balancing weights are fixedly connected to the ends, away from the sleeve, of the two swing rods, and the free ends of the blocking rods are matched with the swing rods. The valve has the beneficial effects that swing of the swing rod is adjusted by adjusting movement of the sliding block, then the balancing weight is controlled to be close to the valve clack to jack up the valve clack, and therefore the opening angle of the valve clack is changed.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, and in particular to a check valve with adjustable opening angle and a use method thereof. Background Art

[0002] At present, there are many kinds of check valves at home and abroad. Check valves should be widely used in water supply and drainage. They have the characteristics of simple structure, easy maintenance, good sealing performance, etc. The main installation position of the check valve is on the system of horizontal drainage pipeline channel. It can also be installed at the outlet of the water pump. This installation method is used to prevent water hammer and backflow from causing damage to the water pump to a minimum. However, the check valve is difficult to be flushed open by water in the low-pressure water system pipeline, and the check valve is installed in the pipeline in an overall closed state. Generally, it is judged by manually listening to the sound of water flow to determine whether the valve is working, and the opening angle of the valve disc cannot be controlled.

[0003] At present, the research on check valves is focused on how to control slow closing and eliminate water hammer. For example, China Utility Model Patent Publication No. CN202252162U discloses a slow-closing rubber flap check valve, which includes a valve body 3 and a valve flap 2 located in the valve body 3, and also includes a slow-closing device. The rapid closing in the front stage prevents the water hammer caused by the backflow of the medium from damaging the water pump. In the latter stage, the needle valve is adjusted to extend the closing time of the valve flap, eliminate the generation of huge water hammer, and protect the entire pipeline system. However, there is no report on controlling the opening angle of the valve flap of the check valve. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing check valve only has a check function but no adjustment function, and for this purpose, a check valve with adjustable opening angle and a use method thereof are provided.

[0005] The technical solution of the present invention is: a check valve with adjustable opening angle and a method of use, comprising a valve body, a valve cover and a valve disc, a downwardly protruding corner portion being formed at the bottom of the valve body, the corner portion having a plane facing the valve disc, a sleeve with one end extending toward the valve disc and the other end being located outside the valve body, a slider being slidably fitted in the sleeve, one end of the slider extending from the other end of the sleeve, an open groove being axially provided on the upper surface of the sleeve located in the valve body, a fin extending out of the open groove being fixedly connected to the upper surface of the slider, blocking rods extending outwardly being fixedly connected on both sides of the fin, the sleeves on both sides of the open groove being hinged to two rocker arms through torsion springs, a counterweight being fixedly connected to one end of the two rocker arms away from the sleeve, and the free end of the blocking rod being matched with the rocker arm.

[0006] An improvement of the above solution is that the free end of the blocking rod has a hook-shaped portion that cooperates with the swing rod.

[0007] A further improvement of the above solution is that a handle is fixedly connected to one end of the sliding block.

[0008] A further improvement of the above solution is that the handle is drivingly connected to the cylinder.

[0009] One end of the sleeve in the above solution is closed.

[0010] In the above solution, the side of the counterweight block facing the valve disc is an arc surface.

[0011] In the above solution, the width of the counterweight block is equivalent to the width of the valve disc.

[0012] The method for using a check valve with an adjustable opening angle comprises the following steps: pushing a slider to move the valve disc toward a closed state, the slider driving a fin to move until a blocking rod contacts a rocker arm and pushes the rocker arm to swing around a sleeve, a counterweight contacting the middle of the valve disc and lifting the valve disc, and controlling the opening angle of the valve disc by controlling the distance the slider moves.

[0013] The beneficial effect of the present invention is to adjust the swing of the swing rod by adjusting the movement of the slider, thereby controlling the counterweight block to approach the valve disc and lift the valve disc, thereby changing the opening angle of the valve disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the present invention; Figure 2 yes Figure 1 Schematic diagram of the coordination between the middle casing, the swing rod and the fins; Figure 3 yes Figure 2 Side view of Figure 4 It is a schematic diagram of the use state of the present invention; In the figure, 1, valve body, 2, valve cover, 3, valve disc, 4, corner part, 41, plane, 5, sleeve, 6, slider, 7, fin, 8, barrier rod, 9, rocker arm, 10, counterweight. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0016] like Figure 1-3As shown, the present invention comprises a valve body 1, a valve cover 2 and a valve disc 3. The bottom of the valve body is provided with an adjustment mechanism for controlling the opening angle of the valve disc. The adjustment mechanism comprises a corner portion 4 protruding downward. The corner portion has a plane 41 facing the valve disc. The plane is penetrated by a sleeve 5 with one end extending toward the valve disc and the other end located outside the valve body. The sleeve and the valve body are sealed and matched. A slider 6 is slidably matched in the sleeve. The slider and the sleeve are dynamically sealed to prevent the fluid from flowing out from between the sleeve and the slider. One end of the slider extends from the other end of the sleeve. The upper surface of the sleeve located in the valve body is provided with an open groove along the axial direction. The upper surface of the slider is fixed with a fin 7 extending out of the open groove. Both sides of the fin are fixed with a blocking rod 8 extending outward. The sleeves on both sides of the open groove are hinged with two swing rods 9 through torsion springs. The ends of the two swing rods away from the sleeve are fixed with a counterweight 10. The free end of the blocking rod is matched with the swing rod. When not in use, the valve disc is closed, the counterweight block does not contact the valve disc, and the torsion of the torsion spring stabilizes the counterweight block. The projection area of ​​the counterweight block on the valve disc is located in the center of the valve disc. The counterweight block is set in this way to save the moving distance of the slider. Since the space at the bottom of the valve body is small, if the rocker arm and the counterweight block are not used, the slider directly contacts the valve disc to change the opening angle of the valve disc, and the operating space is insufficient, or the opening angle of the valve disc that can be changed is small. After adopting the above technical solution, the moving distance of the slider is shortened.

[0017] like Figure 1 , Figure 4 As shown, the method for using the check valve with adjustable opening angle includes the following steps: pushing the slider to move it toward the valve disc in the closed state, the slider drives the fin to move until the blocking rod contacts the swing rod and pushes the swing rod to swing around the sleeve, the counterweight contacts the middle of the valve disc and lifts the valve disc, and the opening angle of the valve disc is controlled by controlling the distance the slider moves. When the opening angle of the valve disc does not need to be changed, the slider moves out of the valve body, the blocking rod is separated from the swing rod, the torsion spring drives the counterweight back to the initial position, and the fin also has a limiting function to prevent the slider from detaching from the sleeve.

[0018] As a preferred example of the present invention, the free end of the blocking rod has a hook-shaped portion that cooperates with the rocker arm. When the hook-shaped portion cooperates with the rocker arm, the rocker arm can be stably pushed to swing in the direction of the valve disc. Compared with a linear blocking rod, the cooperation between the hook-shaped portion and the rocker arm is more stable and reliable.

[0019] As a preferred example of the present invention, a handle is fixedly connected to one end of the slider, and the handle is convenient for a person to manually operate and push the slider.

[0020] As a preferred example of the present invention, the handle is transmission-connected to the cylinder, specifically the handle is connected to the piston rod of the cylinder, and the cylinder is started to drive the handle to move, changing manual operation to automatic operation, making the operation more convenient.

[0021] As a preferred example of the present invention, one end of the sleeve is closed to prevent the slider from moving too close to the valve disc and the counterweight from rotating too much to cause separation from the valve disc.

[0022] As a preferred example of the present invention, the side of the counterweight block facing the valve disc is an arc surface to prevent the counterweight block from damaging the surface of the valve disc when contacting the valve disc.

[0023] As a preferred example of the present invention, the width of the counterweight block is equivalent to the width of the valve flap, which increases the contact area so that the force on the valve flap is uniform and the angle of the valve flap can be changed more flexibly.

Claims

1. A check valve with adjustable opening angle, comprising a valve body (1), a valve cover (2) and a valve disc (3), wherein: A downwardly protruding corner portion (4) is formed at the bottom of the valve body, and the corner portion has a plane (41) facing the valve disc. A sleeve (5) is passed through the plane, one end of which extends toward the valve disc and the other end is located outside the valve body. A slider (6) is slidably fitted in the sleeve, and one end of the slider extends from the other end of the sleeve. An upper surface of the sleeve located inside the valve body is provided with an open groove along the axial direction. A fin (7) extending out of the open groove is fixedly connected to the upper surface of the slider, and blocking rods (8) extending outward are fixedly connected on both sides of the fin. The sleeves on both sides of the open groove are hinged with two rocker arms (9) through torsion springs. A counterweight (10) is fixedly connected to one end of the two rocker arms away from the sleeves, and the free end of the blocking rod cooperates with the rocker arm.

2. A check valve with adjustable opening angle as claimed in claim 1, characterized in that: The free end of the blocking rod is provided with a hook-shaped portion matched with the swing rod.

3. A check valve with adjustable opening angle as claimed in claim 1, characterized in that: One end of the sliding block is fixedly connected with a handle.

4. A check valve with adjustable opening angle as claimed in claim 3, characterized in that: The handle is drivingly connected to the cylinder.

5. A check valve with adjustable opening angle as claimed in claim 1, characterized in that: One end of the sleeve is closed.

6. A check valve with adjustable opening angle as claimed in claim 1, characterized in that: The side of the counterweight block facing the valve disc is an arc surface.

7. A check valve with adjustable opening angle as claimed in claim 1, characterized in that: The width of the counterweight block is equivalent to the width of the valve disc.

8. The method for using the check valve with adjustable opening angle according to any one of claims 1 to 7, characterized in that: The following steps are involved: Push the slider to move it toward the closed valve disc. The slider drives the fin to move until the blocking rod contacts the rocker arm and pushes the rocker arm to swing around the sleeve. The counterweight contacts the middle of the valve disc and lifts the valve disc. The opening angle of the valve disc is controlled by controlling the distance the slider moves.

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