A corrosion-resistant, low-flow-resistance externally controlled sealed check valve

Abstract

This utility model relates to the field of valve technology, and in particular to a corrosion-resistant, low-flow-resistance, externally controlled, sealed check valve. A first bevel gear is fixedly connected to the end of the handle, and the first bevel gear meshes with a second bevel gear. A threaded rod is fixedly connected to the end of the output shaft of the second bevel gear. Both ends of the threaded rod are rotatably connected to a fixed block via bearings. The outer wall of the threaded rod is threadedly connected to a bent plate, and the left side of the bent plate is fixedly connected to a movable block. This corrosion-resistant, low-flow-resistance, externally controlled, sealed check valve, through the cooperation of the handle and the fixing mechanism, allows the operator to first pull down the handle, causing the vertical rod to move out of the groove on the valve body. When the slot on the left side of the vertical rod aligns with the locking block, the operator rotates the bolt, causing the locking block to abut against the inner wall of the slot on the left side of the vertical rod, thereby locking the vertical rod. This eliminates the need for the operator to constantly hold the handle when turning the handle, making it easier for the operator to adjust the water flow inside the valve body.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a corrosion-resistant, low-flow-resistance externally controlled sealing 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 the backflow of the medium. 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 mode is divided into lifting type and swing type.

[0003] For example, a low-flow check valve with announcement number "CN218408658U" uses a rotating shaft that drives a rod to rotate via a driving and driven bevel gear. This causes the threaded rod to move the cylinder, changing the gap between the movable block and the inner wall of the valve body, thus controlling the water flow inside the valve body. Furthermore, when the outer wall of the movable block is in contact with the valve body, it isolates the interior of the valve body, effectively stopping the water flow. This design avoids water waste and enhances the check valve's functionality. However, this low-flow check valve requires the operator to continuously press the handle while rotating the knob to disengage the clamp from the limiting gear. When the knob reaches a certain position, the operator's hand may get stuck, requiring them to release the handle and press it again, making adjustment inconvenient. Summary of the Invention

[0004] The purpose of this utility model is to solve the problem that when the knob is turned, the operator needs to keep pressing the handle to move the clamping block out of the limiting gear. When the knob is turned to a certain position, the operator's hand is easily stuck. The operator needs to release the handle and press it again, which is inconvenient for the operator to adjust. Therefore, a corrosion-resistant, low flow resistance external control sealing check valve is proposed.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A corrosion-resistant, low-flow-resistance externally controlled sealed check valve is designed, comprising a valve body and a handle. The inner wall of the valve body is rotatably connected to the handle via a sealed bearing. A fixing mechanism is provided on the left side of the handle. A first bevel gear is fixedly connected to the end of the handle. The first bevel gear meshes with a second bevel gear. A threaded rod is fixedly connected to the end of the output shaft of the second bevel gear. Both ends of the threaded rod are rotatably connected to a fixed block via bearings. The outer wall of the threaded rod is threadedly connected to a bent plate. The left side of the bent plate is fixedly connected to a movable block.

[0007] Preferably, sliding seats are fixedly connected to both sides of the bent plate, and the outer wall of the sliding seat is slidably connected to the valve body.

[0008] Preferably, the fixing mechanism includes a turntable, the inner wall of the turntable is fixedly connected to the outer wall of the handle, the inner wall of the handle is slidably connected to the vertical rod, the lower end of the vertical rod is fixedly connected to a handle, the outer wall of the vertical rod is sleeved with a second spring, the two ends of the second spring are fixedly connected to the vertical rod and the turntable respectively, a vertical plate is fixedly connected to the upper left side of the turntable, the vertical plate is threadedly connected to a bolt, and the end of the bolt is rotatably connected to a locking block through a bearing.

[0009] Preferably, the upper part of the vertical rod abuts against the valve housing, and the outer walls of the fixing block and the fixing plate are both fixedly connected to the valve housing.

[0010] Preferably, a sealing gasket is fixedly connected to the outer wall of the movable block, and the inner wall of the fixed plate is slidably connected to the slide rod.

[0011] Preferably, a first spring is sleeved on the outer wall of the slide rod, and the two ends of the first spring are fixedly connected to the check valve and the fixing plate, respectively, and the left side of the check valve abuts against the valve body.

[0012] The present invention proposes a corrosion-resistant, low-flow-resistance externally controlled sealing check valve, which has the following advantages: through the cooperation of the handle and the fixing mechanism, the operator first pulls the handle down, causing the vertical rod to move out of the groove on the valve body. When the slot on the left side of the vertical rod aligns with the locking block, the operator rotates the bolt to make the locking block abut against the inner wall of the slot on the left side of the vertical rod, thereby locking the vertical rod. This eliminates the need for the operator to hold the handle continuously when rotating the handle, making it easier for the operator to adjust the water flow inside the valve body. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 for Figure 1 A front sectional view;

[0015] Figure 3 for Figure 2 A magnified view of part A in the diagram;

[0016] Figure 4 for Figure 3 A partial front sectional view of the centrally fixed mechanism;

[0017] Figure 5 for Figure 2 A magnified view of part B in the diagram;

[0018] Figure 6 for Figure 1 A magnified view of part C in the diagram.

[0019] In the diagram: 1. Valve housing; 2. Fixing mechanism; 201. Handle; 202. Vertical rod; 203. Second spring; 204. Bolt; 205. Vertical plate; 206. Locking block; 207. Turntable; 3. Rotary handle; 4. First bevel gear; 5. Second bevel gear; 6. Threaded rod; 7. Fixing block; 8. Bent plate; 9. Sliding seat; 10. Sliding rod; 11. First spring; 12. Check valve; 13. Fixing plate; 14. Moving block; 15. Sealing gasket. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] See attached document Figure 1-6 In this embodiment, a corrosion-resistant, low-flow-resistance externally controlled sealing check valve includes a valve body 1 and a handle 3. The inner wall of the valve body 1 is rotatably connected to the handle 3 via a sealing bearing. A fixing mechanism 2 is provided on the left side of the handle 3. A first bevel gear 4 is fixedly connected to the end of the handle 3. The first bevel gear 4 meshes with a second bevel gear 5. A threaded rod 6 is fixedly connected to the end of the output shaft of the second bevel gear 5. Both ends of the threaded rod 6 are rotatably connected to a fixing block 7 via bearings. The outer wall of the threaded rod 6 is threadedly connected to a bent plate 8. The left side of the bent plate 8 is fixedly connected to a movable block 14.

[0022] Both sides of the curved plate 8 are fixedly connected to sliding seats 9. The outer wall of the sliding seat 9 is slidably connected to the valve shell 1. The upper part of the vertical rod 202 is pressed against the valve shell 1. The outer walls of the fixed block 7 and the fixed plate 13 are fixedly connected to the valve shell 1. The outer wall of the movable block 14 is fixedly connected to a sealing gasket 15, which can play a sealing role. The inner wall of the fixed plate 13 is slidably connected to the slide rod 10. The outer wall of the slide rod 10 is sleeved with a first spring 11. The spring force coefficient of the first spring 11 and the second spring 203 can be selected according to actual needs to meet the working requirements. The two ends of the first spring 11 are fixedly connected to the check valve 12 and the fixed plate 13 respectively. The left side of the check valve 12 is pressed against the valve shell 1.

[0023] The fixing mechanism 2 includes a turntable 207, the inner wall of the turntable 207 is fixedly connected to the outer wall of the handle 3, the inner wall of the handle 201 is slidably connected to the vertical rod 202, the lower end of the vertical rod 202 is fixedly connected to the handle 201, the outer wall of the vertical rod 202 is sleeved with a second spring 203, the two ends of the second spring 203 are fixedly connected to the vertical rod 202 and the turntable 207 respectively, and a vertical plate 205 is fixedly connected to the upper left side of the turntable 207. The vertical plate 205 is threadedly connected to the bolt 204, and the end of the bolt 204 is rotatably connected to a locking block 206 through a bearing.

[0024] Working principle:

[0025] When using corrosion-resistant, low-flow-resistance externally controlled sealed check valves:

[0026] The valve body 1 is connected to the corresponding pipes via flanges on both sides. When water flows into the valve body 1 from the left (the inner and outer walls of the valve body 1 can be coated with epoxy resin for corrosion protection), it impacts the check valve 12, causing the check valve 12 to move the slide rod 10 to the right along the inner wall of the fixed plate 13, allowing water to enter the valve body 1. When the water flow stops, the slide rod 10 can be reset under the action of the first spring 11, so that the check valve 12 can return to its initial position, preventing water from flowing back into the valve body 1.

[0027] When it is necessary to control the water flow rate into the valve housing 1, the operator first pulls down the handle 201, causing the vertical rod 202 to move out of the groove on the valve housing 1. When the slot on the left side of the vertical rod 202 aligns with the locking block 206, the operator rotates the bolt 204, causing the locking block 206 to abut against the inner wall of the slot on the left side of the vertical rod 202, thereby locking the vertical rod 202. This eliminates the need for the operator to continuously pull the handle 201 when turning the knob 3, making it easier for the operator to adjust the water flow rate inside the valve housing 1.

[0028] When the vertical rod 202 is locked, the operator turns the handle 3 to drive the first bevel gear 4 to rotate, which in turn drives the second bevel gear 5 to rotate. The rotation of the second bevel gear 5 drives the threaded rod 6 to rotate, which in turn drives the bent plate 206 to move. At the same time, it drives the sliding seat 9 to slide along the inner wall of the valve body 1, and changes the gap between the movable block 14 and the valve body 1, thereby controlling the water flow. In addition, when the outer wall of the movable block 14 is completely in contact with the inner wall of the valve body 1, the sealing gasket 15 can play a sealing role, thereby achieving the function of isolating the inside of the valve body 1. After each adjustment of the water flow, the vertical rod 202 is always aligned with the groove below the valve body 1, and the water flow can be adjusted within a certain range. After the water flow is adjusted, the operator turns the bolt 204 to move the locking block 206 out of the slot on the left side of the vertical rod 202. The vertical rod 202 is reset under the action of the second spring 203, so that the vertical rod 202 enters the groove below the valve body 1, thereby restricting the rotation of the handle 3.

[0029] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A corrosion-resistant, low-flow-resistance externally controlled sealed check valve, comprising a valve body (1) and a handle (3), wherein the inner wall of the valve body (1) is rotatably connected to the handle (3) via a sealed bearing, characterized in that: The throttle (3) is provided with a fixing mechanism (2) on the left side. The end of the throttle (3) is fixedly connected to a first bevel gear (4). The first bevel gear (4) meshes with a second bevel gear (5). The output shaft end of the second bevel gear (5) is fixedly connected to a threaded rod (6). Both ends of the threaded rod (6) are rotatably connected to the fixing block (7) through bearings. The outer wall of the threaded rod (6) is threadedly connected to the bending plate (8). The left side of the bending plate (8) is fixedly connected to the movable block (14).

2. The corrosion-resistant, low-flow-resistance externally controlled sealing check valve according to claim 1, characterized in that: Both sides of the bent plate (8) are fixedly connected to sliding seats (9), and the outer wall of the sliding seat (9) is slidably connected to the valve body (1).

3. The corrosion-resistant, low-flow-resistance externally controlled sealing check valve according to claim 1, characterized in that: The fixing mechanism (2) includes a turntable (207) and a handle (201). The inner wall of the turntable (207) is fixedly connected to the outer wall of the handle (3). The inner wall of the handle (201) is slidably connected to the vertical rod (202). The lower end of the vertical rod (202) is fixedly connected to the handle (201). The outer wall of the vertical rod (202) is sleeved with a second spring (203). The two ends of the second spring (203) are fixedly connected to the vertical rod (202) and the turntable (207) respectively. A vertical plate (205) is fixedly connected to the upper left side of the turntable (207). The vertical plate (205) is threadedly connected to a bolt (204). The end of the bolt (204) is rotatably connected to a locking block (206) through a bearing.

4. The corrosion-resistant, low-flow-resistance externally controlled sealing check valve according to claim 3, characterized in that: The upper part of the vertical rod (202) abuts against the valve shell (1), and the outer walls of the fixing block (7) and the fixing plate (13) are fixedly connected to the valve shell (1).

5. The corrosion-resistant, low-flow-resistance externally controlled sealing check valve according to claim 4, characterized in that: The outer wall of the movable block (14) is fixedly connected to a sealing gasket (15), and the inner wall of the fixed plate (13) is slidably connected to the slide rod (10).

6. The corrosion-resistant, low-flow-resistance externally controlled sealed check valve according to claim 5, characterized in that: The outer wall of the slide bar (10) is fitted with a first spring (11), and the two ends of the first spring (11) are fixedly connected to the check valve (12) and the fixing plate (13) respectively. The left side of the check valve (12) is pressed against the valve body (1).

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