An adjustable check valve

Abstract

This utility model relates to the field of check valve technology. This application discloses an adjustable check valve, including a check valve body, a check port fixed inside the check valve body, a valve body on one side of the check port, a first fixing plate fixed inside the check valve body near one end of the valve body, a second fixing plate between the first fixing plate and the valve body, and the second fixing plate fixedly connected to the check valve body. This utility model sets a first limiting plate at the rear end of the valve body, and drives a control gear to rotate by a control knob, so that the control gear drives a connecting plate to move, thereby allowing the connecting plate to control the first limiting plate to adjust the rebound distance of the valve body. This also reduces the impact pressure of water flow on the spring, and solves the problem that when the water flow is large, the distance between the valve and the check port is too far to rebound and seal the check port in time, and the spring is constantly subjected to water pressure, which easily reduces the spring's rebound force.

Description

Technical Field

[0001] This utility model application relates to the field of check valve technology, specifically an adjustable check valve. Background Technology

[0002] A check valve is an automatically opening and closing valve used to control the unidirectional flow of fluid and prevent backflow. Its working principle relies on the fluid pressure difference: when the inlet pressure is higher than the outlet pressure, the valve opens; when the pressure reverses, the valve disc automatically closes under gravity, spring force, or the reverse action of the medium, blocking the backflow. Common types include swing, lift, butterfly, and ball check valves. They are suitable for media such as water, steam, and oil. They are characterized by their simple structure and lack of external operation, and are widely used in water supply and drainage, petroleum, chemical, and power systems to protect pipeline equipment from backflow damage and ensure process safety and efficiency. Selection must consider the characteristics of the medium, installation direction, and pressure conditions.

[0003] Traditional check valves often cannot control the flow of water. When the water flow is large, the valve is far from the check port and often cannot rebound in time to seal the check port. At the same time, when the water flow is large, the spring is constantly subjected to water pressure, which can reduce the spring's rebound force and thus reduce the check valve's check-back effect. Summary of the Invention

[0004] To address the issues that when the water flow is high, the valve is too far from the check valve to promptly rebound and seal the check valve, and the spring is constantly subjected to water pressure, which can reduce the spring's rebound force, this invention provides an adjustable check valve to solve the aforementioned problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An adjustable check valve includes a check valve body, a check port fixed inside the check valve body, a valve body on one side of the check port, a first fixing plate fixed inside the check valve body near one end of the valve body, a second fixing plate between the first fixing plate and the valve body, the second fixing plate being fixedly connected to the check valve body, two sliding rods symmetrically fixed on the side of the check port near the first fixing plate, each sliding rod having its end away from the check port passing through the second fixing plate and being fixedly connected to the first fixing plate, the valve body being slidably connected to the sliding rods, a spring sleeved between the valve body and the second fixing plate, a control gear rotatably connected inside the first fixing plate, a connecting rod fixed to the top surface of the control gear, the connecting rod extending above the check valve body, a control knob fixed to the top surface of the connecting rod, a connecting plate slidably connected inside the first fixing plate, the connecting plate meshing with the control gear, and a fixing device provided on the top surface of the check valve body near the control knob.

[0006] Furthermore, the fixing device includes a clamping plate, and two clamping plates are symmetrically arranged on both sides of the control knob. The bottom end of each clamping plate is fixedly connected to the body of the check valve. A clamping tube is inserted inside the control knob and the clamping plate, and a slot matching the shape of the clamping tube is opened inside the control knob and the clamping plate.

[0007] Furthermore, a first limiting plate is fixed to one end of the connecting plate near the valve body, and a second limiting plate is fixed to the other end of the connecting plate away from the first limiting plate.

[0008] Furthermore, a limiting gear is rotatably provided inside the second fixed plate, and the limiting gear meshes with the connecting plate.

[0009] Furthermore, a rubber pad is provided at one end of the first limiting plate near the valve body, and another rubber pad is provided at one end of the valve body near the check port.

[0010] Furthermore, the outer side of the control knob is provided with anti-slip stripes, and the slots inside the control knob are arranged in a cross pattern.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. In this utility model, by setting a first limiting plate at the rear end of the valve body, and by driving the control gear to rotate through the control knob, the control gear drives the connecting plate to move, thereby allowing the connecting plate to control the first limiting plate to adjust the rebound distance of the valve body. This also reduces the impact pressure of water flow on the spring, and solves the problem that when the water flow is large, the distance between the valve and the check port is too far to rebound and seal the check port in time, and at the same time, the spring is continuously subjected to water pressure, which easily reduces the spring's rebound force.

[0012] 2. In this utility model, by symmetrically setting a retaining plate on the top surface of the check valve body and inserting a retaining tube inside the control knob, the control knob is fixedly connected to the retaining plate through the retaining tube. This prevents the first limiting plate from moving due to the valve body hitting the first limiting plate when the valve body is released from the first limiting plate, thus avoiding affecting the positioning effect of the first limiting plate on the valve body. At the same time, the anti-slip stripes on the control knob improve the convenience of the operator in using the control knob. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1This is a schematic diagram of the front-end structure according to an embodiment of this application; Figure 2 yes Figure 1 The diagram shown is a three-dimensional representation of the front-end structure after opening in the embodiment shown. Figure 3 yes Figure 1 The diagram shown is a three-dimensional representation of the rear-end structure after opening in the embodiment shown. Figure 4 yes Figure 1 The illustrated embodiment shows a cross-sectional view of the rear structure after opening.

[0015] The meanings of the reference numerals in the figure are as follows: 1. Check valve body; 2. Check port; 3. Valve body; 4. First fixing plate; 5. Second fixing plate; 6. Sliding rod; 7. Spring; 8. First limiting plate; 9. Connecting plate; 10. Second limiting plate; 11. Control gear; 12. Connecting rod; 13. Control knob; 14. Clamping plate; 15. Clamping tube; 16. Limiting gear. Detailed Implementation

[0016] To make the purpose, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4An adjustable check valve includes a check valve body 1, a check port 2 fixed inside the check valve body 1, a valve body 3 disposed on one side of the check port 2, a first fixing plate 4 fixed inside the check valve body 1 near the valve body 3, a second fixing plate 5 disposed between the first fixing plate 4 and the valve body 3, the second fixing plate 5 being fixedly connected to the check valve body 1, and two sliding rods 6 symmetrically fixed on the side of the check port 2 near the first fixing plate 4, each sliding rod 6 having its end away from the check port 2 passing through the second fixing plate 5 and being fixedly connected to the first fixing plate 4. A spring 7 is sleeved between the valve body 3 and the second fixed plate 5, and a control gear 11 is rotatably connected inside the first fixed plate 4. A connecting rod 12 is fixed on the top surface of the control gear 11 and extends above the check valve body 1. A control knob 13 is fixed on the top surface of the connecting rod 12. A connecting plate 9 is slidably connected inside the first fixed plate 4 and meshes with the control gear 11. A fixing device is provided at the end of the top surface of the check valve body 1 near the control knob 13, so that the first limiting plate 8 limits the movement position of the valve body 3.

[0018] Specifically, a first limiting plate 8 is fixed to one end of the connecting plate 9 near the valve body 3, and a second limiting plate 10 is fixed to the other end of the connecting plate 9 away from the first limiting plate 8. A limiting gear 16 is rotatably provided inside the second fixing plate 5, and the limiting gear 16 meshes with the connecting plate 9. A rubber pad is provided at one end of the first limiting plate 8 near the valve body 3, and another rubber pad is provided at one end of the valve body 3 near the check port 2 to reduce the impact force of the valve body 3 on the first limiting plate 8.

[0019] As an optimization solution, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the fixing device includes a clamping plate 14. Two clamping plates 14 are symmetrically arranged on both sides of the control knob 13. The bottom end of each clamping plate 14 is fixedly connected to the check valve body 1. A clamping tube 15 is inserted into the control knob 13 and the clamping plate 14. The control knob 13 and the clamping plate 14 have slots that match the shape of the clamping tube 15, so that the control knob 13 is fixedly connected to the clamping plate 14 through the clamping tube 15.

[0020] Specifically, the outer side of the control knob 13 is provided with anti-slip stripes, and the slots inside the control knob 13 are arranged in a cross pattern to improve the ease of operation for staff.

[0021] Working principle: By rotating the control knob 13, the connecting rod 12 rotates, which in turn drives the control gear 11 to rotate. Simultaneously, the control gear 11 meshes with the connecting plate 9, causing the connecting plate 9 to move. The connecting plate 9, in turn, moves the first limiting plate 8, thus adjusting the first limiting plate 8 and the valve body 3 to a suitable position. When water flows through the check port 2, the water flow pushes the valve body 3 closer to the first limiting plate 8. At this point, the first limiting plate 8 supports the valve body 3, facilitating control of the water flow rate. This also reduces the pressure of the valve body 3 on the spring 7. When the water flow stops, the spring 7 rebounds, causing the valve body 3 to disengage from the check port 2, preventing water from flowing back through the check port 2. At the same time, when the operator rotates the control knob 13 until the first limit plate 8 is in contact with the valve body 3, the water flow cannot pass through the check port 2, giving the check valve body 1 a sealing effect. After the operator has adjusted the control knob 13, the clamp tube 15 is aligned with the clamp plate 14 and inserted, and the clamp tube 15 passes through the control knob 13, so that the control knob 13 is fixedly connected to the clamp plate 14 through the clamp tube 15.

[0022] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalent elements of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0023] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An adjustable check valve comprising a check valve body (1), characterized in that: The check valve body (1) has a check port (2) fixed inside. A valve body (3) is provided on one side of the check port (2). A first fixing plate (4) is fixed inside the check valve body (1) near the valve body (3). A second fixing plate (5) is provided between the first fixing plate (4) and the valve body (3). The second fixing plate (5) is fixedly connected to the check valve body (1). Two sliding rods (6) are symmetrically fixed on the side of the check port (2) near the first fixing plate (4). The end of each sliding rod (6) away from the check port (2) passes through the second fixing plate (5) and is fixedly connected to the first fixing plate (4). The main body (3) is slidably connected to the sliding rod (6). A spring (7) is sleeved between the valve body (3) and the second fixing plate (5). A control gear (11) is rotatably connected inside the first fixing plate (4). A connecting rod (12) is fixed on the top surface of the control gear (11). The connecting rod (12) extends to the top of the check valve body (1). A control knob (13) is fixed on the top surface of the connecting rod (12). A connecting plate (9) is slidably connected inside the first fixing plate (4). The connecting plate (9) meshes with the control gear (11). A fixing device is provided at the end of the top surface of the check valve body (1) near the control knob (13).

2. An adjustable check valve according to claim 1, wherein: The fixing device includes a clamping plate (14). Two clamping plates (14) are symmetrically arranged on both sides of the control knob (13). The bottom end of each clamping plate (14) is fixedly connected to the body of the check valve (1). A clamping tube (15) is inserted inside the control knob (13) and the clamping plate (14). A slot matching the shape of the clamping tube (15) is opened inside the control knob (13) and the clamping plate (14).

3. An adjustable check valve according to claim 1, wherein: The connecting plate (9) is fixed with a first limiting plate (8) at one end near the valve body (3), and a second limiting plate (10) is fixed at the other end of the connecting plate (9) away from the first limiting plate (8).

4. An adjustable check valve according to claim 1, wherein: The second fixing plate (5) is rotatably provided with a limiting gear (16), which meshes with the connecting plate (9).

5. An adjustable check valve according to claim 3, wherein: The first limiting plate (8) is provided with a rubber pad at one end near the valve body (3), and the valve body (3) is provided with another rubber pad at one end near the check port (2).

6. An adjustable check valve according to claim 2, wherein: The outer side of the control knob (13) is provided with anti-slip stripes, and the slots inside the control knob (13) are arranged in a cross pattern.

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