Piston type balance valve structure

Abstract

The utility model discloses a piston type balance valve structure which comprises a valve body, a piston assembly is arranged on the surface of the valve body, the piston assembly comprises a rotating handle, a lead screw is fixedly connected to the bottom of the rotating handle in a sleeved mode, a valve rod is connected to the surface of the lead screw in a threaded and sleeved mode, and an adjusting piece is arranged at the bottom of the valve rod. A piston is arranged on the surface of each adjusting piece in a sleeved mode, and the adjusting pieces are arranged in an inner cavity of the rotating handle and an inner cavity of the lead screw respectively. According to the piston type balance valve structure, the problems that a sealing piece is prone to deformation due to long-time washing by liquid, an elastic supporting piece is prone to generating dirt due to long-time corrosion, the generated dirt can affect elasticity reduction, and the sealing effect is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of balancing valves, in particular to a piston type balancing valve structure. Background Art

[0002] A balancing valve is a valve with a special function. The valve itself is not special; it differs only in its function and location. In some industries, due to the large pressure or flow differences between different parts of a pipeline or container, a valve is installed between the corresponding pipelines or containers to reduce or balance the difference. This valve is used to adjust the relative pressure balance on both sides, or to achieve flow balance by diverting the flow. This valve is called a balancing valve.

[0003] A search of patent number CN202320415661.5 reveals a balancing valve, specifically relating to the field of valve technology, comprising a valve body, one end of which is provided with a liquid inlet, the other end of which is provided with a liquid outlet, and an inclined valve disc disposed within the inner cavity of the valve body, the circumference of which is fixedly connected to the inner wall of the valve body. This application utilizes the coordination of the valve disc, seal, annular groove, elastic support, and valve plug to seal the valve body. This prevents liquid from being discharged, increasing the liquid pressure within the valve body at the liquid inlet end. At this time, the liquid in the inner cavity of the annular groove squeezes the sidewall of the annular groove away from the valve disc, thereby tightly fitting the inner wall of the seal to the outer surface of the valve plug, thereby increasing the fit between the seal and the valve plug. This minimizes the friction between the valve plug and the tension block that occurs when adjusting the position of the valve plug in existing balancing valve structures. After long-term friction, a gap will form at the connection between the valve plug and the tension block due to wear, affecting the sealing performance of the tension block.

[0004] The above patent number CN202320415661.5 increases the fit between the seal and the valve plug and improves the sealing performance by tightly fitting the inner wall of the seal and the outer surface of the valve plug. However, since the elastic support and the seal are open and closed, and the liquid entering the valve body is relatively complex, such as liquid with impurities, the seal is easily deformed due to long-term liquid flushing during use. Secondly, the elastic support is prone to long-term corrosion and dirt, and the dirt produced will affect the elasticity and thus affect the sealing effect. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a piston-type balancing valve structure, which solves the problem that the seal is easily deformed due to long-term liquid flushing, and secondly, the elastic support is easily corroded and produces dirt due to long-term corrosion. The dirt produced will affect the elasticity and thus affect the sealing effect.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a piston-type balancing valve structure, including a valve body, a piston assembly is provided on the surface of the valve body.

[0007] The piston assembly includes a rotating handle, and a screw is fixedly sleeved on the bottom of the rotating handle, a valve stem is threadedly sleeved on the surface of the screw, and an adjusting piece is provided at the bottom of the valve stem, and a piston is sleeved on the surface of the adjusting piece, and the inner cavities of the rotating handle and the screw are both provided with adjusting pieces.

[0008] The adjusting part includes a mounting seat and a base, and the top of the base is rotatably sleeved with a hexagon socket bolt, the top of the hexagon socket bolt is rotatably sleeved on the surface of the mounting seat, and are flush with each other, the surface of the hexagon socket bolt is fixedly sleeved with a micro turbine, and the surface of the mounting seat is symmetrically rotatably sleeved with a micro worm, one end of the micro worm is threadedly sleeved with a sleeve, one end of the sleeve is fixedly connected to a spring, and the surface of the sleeve is slidably sleeved with a limit bar through a slide groove.

[0009] Preferably, the base and the mounting seat are fixedly connected to each other and fixedly sleeved in the inner cavity of the piston.

[0010] Preferably, one end of the spring is fixedly connected to the inner wall of the piston, and one end of the limit strip is fixedly connected to the surface of the mounting seat.

[0011] Preferably, the rotary handle is rotatably sleeved on the surface of the valve body, and the valve stem is slidably sleeved in the inner cavity of the valve body.

[0012] Preferably, a valve seat is provided on the inner wall of the valve body and is pressed and fitted with the piston.

[0013] Preferably, the surface of the valve body is symmetrically connected with a test hole, and the port of the test hole is provided with a sealing sleeve.

[0014] The utility model provides a piston-type balancing valve structure. Compared with the existing technology, it has the following beneficial effects:

[0015] 1. The piston-type balancing valve structure has a mounting seat fixedly connected to the bottom of the valve stem, so the hexagon socket bolt is located in the inner cavity of the valve stem, and the mounting seat sleeve is arranged in the inner cavity of the piston and is sealed with the piston. Therefore, the adjusting part is wrapped inside and will not come into contact with the fluid medium, avoiding deformation caused by erosion due to fluid contact and will not generate dirt, thereby affecting its adjustment.

[0016] 2. The piston-type balancing valve structure can directly insert the external hexagonal handle into the hexagonal bolt through the provided adjustment piece, so that the micro-turbine and the micro-worm are engaged and rotated, thereby causing the sleeve to expand and contract, and the piston is squeezed by the spring, which can be adjusted to achieve a tight seal between the piston and the valve seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the piston assembly of the utility model structure;

[0020] Figure 4 This is a partial schematic diagram of the piston assembly of the utility model structure;

[0021] Figure 5 This is a schematic diagram of the structural adjustment member of the utility model;

[0022] Figure 6 This is a schematic diagram of the installation of the structural adjustment member and the piston of the utility model.

[0023] In the figure: 1. Valve body; 2. Piston assembly; 21. Rotating handle; 22. Screw; 23. Valve stem; 24. Piston; 25. Adjusting part; 251. Mounting seat; 252. Base; 253. Hexagon socket bolt; 254. Micro turbine; 255. Micro worm; 256. Sleeve; 257. Spring; 258. Slide; 259. Limit strip; 3. Test hole; 4. Sealing sleeve; 5. Valve seat. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-2 The utility model provides a technical solution: a piston-type balancing valve structure, including a valve body 1, a piston assembly 2 is provided on the surface of the valve body 1, a valve seat 5 is provided on the inner wall of the valve body 1, and a test hole 3 is symmetrically connected to the surface of the valve body 1, and a sealing sleeve 4 is provided at the port of the test hole 3, wherein the sealing sleeve 4 is opened and the plug angle of the external detector is inserted into the inner cavity of the test hole 3 for detection.

[0026] See also Figure 3-4The piston assembly 2 includes a rotary handle 21, which is rotatably sleeved on the surface of the valve body 1, and a screw rod 22 is fixedly sleeved on the bottom of the rotary handle 21, and a valve stem 23 is threadedly sleeved on the surface of the screw rod 22, and the valve stem 23 is diamond-shaped, which is convenient for the screw rod 22 to drive the valve stem 23 to slide on the inner wall of the valve body 1. The valve stem 23 is slidably sleeved in the inner cavity of the valve body 1, and an adjusting member 25 is provided at the bottom of the valve stem 23, and a piston 24 is sleeved on the surface of the adjusting member 25. The piston 24 will squeeze and fit with the valve seat 5 to form a sealing effect, and the inner cavities of the rotary handle 21 and the screw rod 22 are both provided with adjusting members 25, and the provided adjusting member 25 can expand the piston 24, so that the piston 24 is more tightly secured when in contact with the valve seat 5.

[0027] See also Figure 5-6 The adjusting member 25 includes a mounting seat 251 and a base 252. The base 252 and the mounting seat 251 are fixedly connected to each other and fixedly sleeved in the inner cavity of the piston 24. The top of the base 252 is rotatably sleeved with a hexagon socket bolt 253. The top of the hexagon socket bolt 253 is rotatably sleeved on the surface of the mounting seat 251 and is flush with each other. The surface of the hexagon socket bolt 253 is fixedly sleeved with a micro turbine 254, and the surface of the mounting seat 251 is symmetrically rotatably sleeved with a micro worm 255. One end of the micro worm 255 is threadedly sleeved with a sleeve 256. One end of the sleeve 256 is fixedly connected to a spring 257. One end of the spring 257 is fixedly connected to the piston 24, and the surface of the sleeve 256 is slidably sleeved with a limit strip 259 through a slide groove 258, and one end of the limit strip 259 is fixedly connected to the surface of the mounting seat 251. In addition, through the provided adjustment member 25, the external hexagonal handle can be directly inserted and clamped on the hexagonal bolt 253, so that the micro turbine 254 and the micro worm 255 are engaged and rotated, thereby causing the sleeve 256 to expand and contract, and the spring 257 is used to squeeze the piston 24, which can be adjusted so that the piston 24 can achieve an extrusion seal when it is in contact with the valve seat 5, thereby achieving a better sealing effect. The adjustment method can also avoid the problem of gaps in the seal due to long-term wear.

[0028] In addition, since the mounting seat 251 is fixedly connected to the bottom of the valve stem 23, the hexagon socket bolt 253 will be located in the inner cavity of the valve stem 23, and the mounting seat 251 is sleeved in the inner cavity of the piston 24 and is sealed with the piston 24. Therefore, the adjusting member 25 is wrapped inside and will not come into contact with the fluid medium, avoiding deformation caused by erosion due to fluid contact and will not produce dirt, thereby affecting its adjustment.

[0029] During operation, first connect the two ends of the valve body 1 with the required pipes and allow the fluid medium to flow. Then, rotate the rotary handle 21 so that the rotary handle 21 drives the screw rod 22 to rotate on the surface of the valve body 1, thereby driving the diamond-shaped valve stem 23 to slide in the inner wall of the valve body 1, thereby opening and closing the piston 24 and the valve seat 5, thereby changing the flow rate of the fluid medium, and reducing the pressure difference or flow difference between the pipes. Then, insert the hexagonal wrench into the hexagonal bolt 253 through the screw rod 22 and the rotary handle 21, and rotate the hexagonal bolt 253 to make the hexagonal bolt The bolt 253 rotates on the mounting seat 251 and the base 252, causing the micro turbine 254 to engage and rotate with the micro worm 255, so that the threaded end of the micro worm 255 drives the sleeve 256 to slide on the limit bar 259, so that the sleeve 256 extends and squeezes the spring 257, and the spring 257 retracts after being squeezed and squeezes the inner cavity of the piston 24, so that the piston 24 expands outward, so that the piston 24 realizes an extrusion seal when it fits with the valve seat 5, thereby achieving a better sealing effect. The adjustment method can also avoid the problem of gaps in the seal due to long-term wear.

[0030] At the same time, the contents not described in detail in this specification belong to the existing technology well known to those skilled in the art.

Claims

1. A piston type balancing valve structure, comprising a valve body (1), characterized in that: A piston assembly (2) is provided on the surface of the valve body (1); The piston assembly (2) comprises a rotating handle (21), and a screw rod (22) is fixedly sleeved on the bottom of the rotating handle (21), a valve stem (23) is threadedly sleeved on the surface of the screw rod (22), and an adjusting member (25) is provided at the bottom of the valve stem (23), and a piston (24) is sleeved on the surface of the adjusting member (25), and the inner cavities of the rotating handle (21) and the screw rod (22) are both provided with adjusting members (25); The adjusting member (25) comprises a mounting seat (251) and a base (252), and the top of the base (252) is rotatably sleeved with a hexagon socket bolt (253), the top of the hexagon socket bolt (253) is rotatably sleeved on the surface of the mounting seat (251), and the top ends of the hexagon socket bolts (253) are rotatably sleeved on the surface of the mounting seat (251) and are flush with each other, the surface of the hexagon socket bolts (253) is fixedly sleeved with a micro turbine (254), and the surface of the mounting seat (251) is symmetrically rotatably sleeved with a micro worm (255), one end of the micro worm (255) is threadedly sleeved with a sleeve (256), one end of the sleeve (256) is fixedly connected with a spring (257), and the surface of the sleeve (256) is slidably sleeved with a limit bar (259) through a sliding groove (258).

2. A piston type balancing valve structure according to claim 1, characterized in that: The base (252) and the mounting seat (251) are fixedly connected to each other and are fixedly sleeved in the inner cavity of the piston (24).

3. The piston type balancing valve structure according to claim 1, characterized in that: One end of the spring (257) is fixedly connected to the inner wall of the piston (24), and one end of the limiting strip (259) is fixedly connected to the surface of the mounting seat (251).

4. The piston type balancing valve structure according to claim 1, characterized in that: The rotary handle (21) is rotatably sleeved on the surface of the valve body (1), and the valve stem (23) is slidably sleeved in the inner cavity of the valve body (1).

5. The piston type balancing valve structure according to claim 1, characterized in that: The inner wall of the valve body (1) is provided with a valve seat (5), which is pressed and fitted with the piston (24).

6. The piston type balancing valve structure according to claim 1, characterized in that: The surface of the valve body (1) is symmetrically connected with a test hole (3), and the port of the test hole (3) is provided with a sealing sleeve (4).

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