Balanced cage type regulating valve

Abstract

The utility model provides a balance cage type regulating valve, and relates to the technical field of balance cage type regulating valves, the balance cage type regulating valve comprises a regulating valve body, a sealing structure is arranged on the regulating valve body, the sealing structure is mainly composed of two sealing rings, the two sealing rings are arranged at the two ends of a valve body of the regulating valve body respectively, and the two sealing rings are arranged on the regulating valve body. The two sides of the sealing ring are fixedly connected with connecting rings correspondingly, the connecting rings are matched with the inner diameters of the two ends of a valve body of the adjusting valve body, the two sides of the sealing ring are fixedly connected with a plurality of connecting rods correspondingly, and a plurality of connecting grooves are formed in the two ends of the valve body of the adjusting valve body correspondingly. The balance cage type regulating valve solves the problems that when an existing balance cage type regulating valve is connected with a pipeline, flange plates are usually used for connection, in order to guarantee sealing performance, a gasket is placed between the two flange plates, and the gasket and the flange plates are connected through sealant, so that the sealing performance is affected. And when the sealing performance of the sealing ring is reduced, the sealing ring is inconvenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of balanced cage type regulating valves, in particular to a balanced cage type regulating valve. Background Art

[0002] Cage type control valve is a pressure balanced control valve. The valve internals adopt a sleeve-guided pilot valve core. It mainly uses the pressure of the fluid to achieve rapid action of the valve core with small operating force. In addition, the sealing type adopts a single-seat seal, and the flow characteristic curve has high accuracy, which meets the IEC534-1 standard. The control valve has good dynamic stability, low noise, and anti-cavitation. It is suitable for controlling high-pressure differential fluids of various temperatures. It is equipped with a multi-spring diaphragm actuator or an electric actuator. It has a compact structure and a large output force.

[0003] When using the current balanced cage control valve, the staff often finds that the current balanced cage control valve is usually connected to the pipeline using a flange. In order to ensure the sealing, a gasket is placed between the two flanges and the gasket is connected to the flange using sealant, which can easily lead to the inconvenience of replacing the sealing ring when the sealing performance of the sealing ring is reduced. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a balanced cage type regulating valve.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a balanced cage-type regulating valve, including a regulating valve body, a sealing structure is arranged on the regulating valve body, and the sealing structure is mainly composed of two sealing rings, which are respectively arranged at the two ends of the valve body of the regulating valve body, and connecting rings are fixedly connected on both sides of the sealing rings, and the connecting rings are adapted to the inner diameters of the two ends of the valve body of the regulating valve body.

[0006] The effect achieved by the above components is: when installing the sealing ring, the two connecting rings can be respectively inserted into the pipe to be connected and the valve body, and the sealing ring can be squeezed so that the sealing ring is firmly squeezed between the pipe and the valve body to enhance the sealing performance and facilitate replacement, thereby avoiding the current balanced cage-type regulating valve, which is usually connected to the pipe using a flange connection. In order to ensure the sealing performance, a gasket is placed between the two flanges and the gasket is connected to the flange using sealant, which easily leads to the inconvenience of replacing the sealing ring when the sealing performance of the sealing ring is reduced.

[0007] Preferably, a plurality of connecting rods are fixedly connected to both sides of the sealing ring, and a plurality of connecting grooves are respectively provided at both ends of the valve body of the regulating valve body, and the connecting rods are adapted to the connecting grooves in size.

[0008] The effect achieved by the above components is that the connection of the sealing ring can be made more stable by respectively inserting the plurality of connecting rods into the corresponding connecting grooves.

[0009] Preferably, the sealing ring is provided with four circular grooves, a telescopic rod is provided in the circular groove, and two ends of the telescopic rod are respectively fixedly connected to the inner walls at two ends of the circular groove.

[0010] The effect achieved by the above components is: after the sealing ring is installed, the telescopic rod can be stretched so that the two ends of the telescopic rod squeeze the two sides of the sealing ring, tightly pressing the sealing ring against the connected pipe, making the connection between the sealing ring and the regulating valve body more stable and further enhancing the sealing performance.

[0011] Preferably, a spring is sleeved on the telescopic rod, and two ends of the spring are respectively fixedly connected to the inner walls at both ends of the circular groove.

[0012] The effect achieved by the above components is that when the pipeline and the valve body squeeze the sealing ring, the spring is in a contracted state, so the rebound elastic force of the spring acts on the sealing ring, further strengthening the tightness of the connection.

[0013] Preferably, a lubrication structure is provided on the regulating valve body, and the lubrication structure is mainly composed of a plurality of balls, and the plurality of balls are rotatably connected to the regulating valve body respectively.

[0014] The effect achieved by the above components is that a plurality of balls are in contact with the valve stem on the regulating valve body, which can reduce the friction between the valve stem and the valve cover, thereby reducing the wear on the valve stem.

[0015] Preferably, an annular groove is provided on the regulating valve body, a connecting pipe is fixedly connected to the regulating valve body, and the connecting pipe is in communication with the annular groove.

[0016] The effect achieved by the above components is that lubricant can be injected into the ring groove through the connecting pipe, and when the ball rolls, the lubricant will contact the valve stem through the ball, thereby enhancing the protection effect on the valve stem.

[0017] Preferably, an airbag is fixedly connected to the connecting tube, and the connecting tube is in communication with the airbag.

[0018] The effect achieved by the above components is that the lubricant can be stored in the airbag, and when the lubricant needs to be injected, it is only necessary to squeeze the airbag, making the operation more convenient.

[0019] Preferably, a liquid injection tube is fixedly connected to the airbag, a liquid injection port is provided on the liquid injection tube, and a rubber plug is clamped on the liquid injection port.

[0020] The effect achieved by the above components is that the rubber plug can be removed, and liquid can be injected into the airbag through the injection port. After the injection is completed, the rubber plug is stuck into the injection port to prevent the lubricant from flowing out.

[0021] Compared with the prior art, the advantages and positive effects of the utility model are that, in the utility model, by setting a sealing structure, when installing the sealing ring, the two connecting rings can be respectively inserted into the pipeline and the valve body to be connected, and the sealing ring can be squeezed so that the sealing ring is firmly squeezed between the pipeline and the valve body to enhance the sealing performance and facilitate replacement. The connection of the sealing ring can be made more stable by inserting a plurality of connecting rods into the corresponding connecting grooves. After the sealing ring is installed, the telescopic rod can be stretched so that the two ends of the telescopic rod squeeze the two sides of the sealing ring, and the sealing ring is tightly pressed against the connected pipeline, so that the connection between the sealing ring and the regulating valve body is more stable, and the sealing performance is further enhanced. When the pipeline and the valve body squeeze the sealing ring, the spring is in a contracted state, so the rebound elastic force of the spring acts on the sealing ring, further enhancing the tightness of the connection, thereby avoiding the current balanced cage regulating valve. When connected to the pipeline, a flange connection is usually used. In order to ensure the sealing performance, a gasket is placed between the two flanges and the gasket is connected to the flange using sealant, which easily leads to the situation that it is inconvenient to replace the sealing ring when the sealing performance of the sealing ring is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional structural schematic diagram of a balanced cage-type regulating valve is proposed for the utility model;

[0023] Figure 2 A partial schematic diagram of a sealing structure of a balanced cage-type regulating valve proposed by the utility model;

[0024] Figure 3 Another partial schematic diagram of a sealing structure of a balanced cage-type regulating valve proposed by the utility model;

[0025] Figure 4 The utility model provides a partial schematic diagram of a lubrication structure of a balanced cage-type regulating valve.

[0026] Legend: 1. Control valve body; 2. Sealing structure; 21. Sealing ring; 22. Connecting ring; 23. Connecting rod; 24. Connecting groove; 25. Circular groove; 26. Telescopic rod; 27. Spring; 3. Lubricating structure; 31. Ball; 32. Ring groove; 33. Connecting pipe; 34. Air bag; 35. Liquid injection pipe; 36. Liquid injection port; 37. Rubber plug. DETAILED DESCRIPTION

[0027] Embodiment 1, as Figure 1 As shown, a balanced cage-type regulating valve includes a regulating valve body 1.

[0028] Reference Figure 2 and Figure 3 , a sealing structure 2 is provided on the regulating valve body 1, and the sealing structure 2 is mainly composed of two sealing rings 21. The two sealing rings 21 are respectively arranged at the two ends of the valve body of the regulating valve body 1, and connecting rings 22 are fixedly connected on both sides of the sealing ring 21. The connecting rings 22 are adapted to the inner diameters of the two ends of the valve body of the regulating valve body 1. When installing the sealing ring 21, the two connecting rings 22 can be respectively inserted into the pipeline and the valve body to be connected, and the sealing ring 21 can be squeezed so that the sealing ring 21 is firmly squeezed between the pipeline and the valve body to enhance the sealing performance and facilitate replacement, thereby avoiding the current balanced cage regulating valve when connected to the pipeline. When the flange is connected, a gasket is placed between the two flanges and the gasket is connected to the flange using a sealant to ensure the sealing performance, which easily leads to the situation that when the sealing performance of the sealing ring 21 is reduced, it is inconvenient to replace the sealing ring 21. A number of connecting rods 23 are fixedly connected on both sides of the sealing ring 21. The regulating valve body A plurality of connecting grooves 24 are respectively provided at both ends of the valve body of the valve body 1, and the connecting rods 23 are matched with the connecting grooves 24 in size. The plurality of connecting rods 23 are respectively inserted into the corresponding connecting grooves 24, so that the connection of the sealing ring 21 can be more stable. Four circular grooves 25 are provided on the sealing ring 21, and a telescopic rod 26 is arranged in the circular groove 25. The two ends of the telescopic rod 26 are respectively fixedly connected with the inner walls at both ends of the circular groove 25. After the sealing ring 21 is installed, the telescopic rod 26 can be stretched so that the two ends of the telescopic rod 26 squeeze the two sides of the sealing ring 21, and the sealing ring 21 is tightly pressed against the connected pipe, so that the connection between the sealing ring 21 and the regulating valve body 1 is more stable, and the sealing performance is further enhanced. A spring 27 is sleeved on the telescopic rod 26, and the two ends of the spring 27 are respectively fixedly connected with the inner walls at both ends of the circular groove 25. When the pipeline and the valve body squeeze the sealing ring 21, the spring 27 is in a contracted state, so the rebound elastic force of the spring 27 acts on the sealing ring 21, further enhancing the tightness of the connection.

[0029] Reference Figure 4The regulating valve body 1 is provided with a lubrication structure 3, which is mainly composed of a plurality of balls 31, which are rotatably connected to the regulating valve body 1, and the plurality of balls 31 are in contact with the valve stem on the regulating valve body 1, which can reduce the friction between the valve stem and the valve cover, thereby reducing the wear on the valve stem. The regulating valve body 1 is provided with an annular groove 32, and a connecting pipe 33 is fixedly connected to the regulating valve body 1. The connecting pipe 33 is connected to the annular groove 32, and lubricant can be injected into the annular groove 32 through the connecting pipe 33. When the balls 31 roll, the lubricant will pass through the balls 31 and the valve stem. The airbag 34 is in contact with the valve stem, thereby enhancing the protection effect of the valve stem. The connecting tube 33 is fixedly connected to an airbag 34, and the connecting tube 33 is communicated with the airbag 34. The lubricant can be stored in the airbag 34. When the lubricant needs to be injected, just pinch the airbag 34, which makes the operation more convenient. The airbag 34 is fixedly connected to an injection tube 35, and the injection tube 35 is provided with an injection port 36. The injection port 36 is clamped with a rubber plug 37. The rubber plug 37 can be removed, and liquid is injected into the airbag 34 through the injection port 36. After the injection is completed, the rubber plug 37 is clamped into the injection port 36 to prevent the lubricant from flowing out.

[0030] Working principle: when installing the sealing ring 21, the two connecting rings 22 can be respectively inserted into the pipe and the valve body to be connected, and the sealing ring 21 can be squeezed so that the sealing ring 21 is firmly squeezed between the pipe and the valve body to enhance the sealing performance and facilitate replacement, thereby avoiding the current balanced cage regulating valve. When connecting to the pipeline, a flange connection is usually used. In order to ensure the sealing performance, a gasket is placed between the two flanges and the gasket is connected to the flange using a sealant. This easily leads to the situation that when the sealing performance of the sealing ring 21 is reduced, it is inconvenient to replace the sealing ring 21. Several connecting rods 23 are respectively inserted into the corresponding connecting grooves 24, which can make the connection of the sealing ring 21 more stable. After the sealing ring 21 is installed, the telescopic rod 26 can be stretched so that the two ends of the telescopic rod 26 squeeze the two sides of the sealing ring 21, and the sealing ring 21 is tightly pressed against the connected pipe to make the seal. The connection between the ring 21 and the regulating valve body 1 is more stable, and the sealing is further enhanced. When the pipeline and the valve body squeeze the sealing ring 21, the spring 27 is in a contracted state, so the rebound elastic force of the spring 27 acts on the sealing ring 21, further enhancing the tightness of the connection. A number of balls 31 are in contact with the valve stem on the regulating valve body 1, which can reduce the friction between the valve stem and the valve cover, thereby reducing the wear on the valve stem. Lubricant can be injected into the annular groove 32 through the connecting pipe 33. When the ball 31 rolls, the lubricant will contact the valve stem through the ball 31, thereby enhancing the protection effect of the valve stem. The lubricant can be stored in the air bag 34. When the lubricant needs to be injected, it only needs to pinch the air bag 34, making the operation more convenient. The rubber plug 37 can be removed and liquid can be injected into the air bag 34 through the injection port 36. After the injection is completed, the rubber plug 37 is stuck into the injection port 36 to prevent the lubricant from flowing out.

[0031] The above is only a preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model. In the description of the utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood by specific circumstances.

Claims

1. A balanced cage type regulating valve, comprising a regulating valve body (1), characterized in that: The regulating valve body (1) is provided with a sealing structure (2), the sealing structure (2) mainly consisting of two sealing rings (21), the two sealing rings (21) being respectively provided at the two ends of the valve body of the regulating valve body (1), the two sides of the sealing ring (21) being respectively fixedly connected with connecting rings (22), the connecting rings (22) being adapted to the inner diameters of the two ends of the valve body of the regulating valve body (1).

2. The balanced cage regulating valve according to claim 1, characterized in that: A plurality of connecting rods (23) are fixedly connected to both sides of the sealing ring (21), and a plurality of connecting grooves (24) are respectively provided at both ends of the valve body of the regulating valve body (1), and the connecting rods (23) and the connecting grooves (24) are matched in size.

3. The balanced cage regulating valve according to claim 2, characterized in that: The sealing ring (21) is provided with four circular grooves (25), a telescopic rod (26) is arranged in the circular groove (25), and two ends of the telescopic rod (26) are respectively fixedly connected to the inner walls at two ends of the circular groove (25).

4. The balanced cage regulating valve according to claim 3, characterized in that: A spring (27) is sleeved on the telescopic rod (26), and two ends of the spring (27) are respectively fixedly connected to the inner walls at both ends of the circular groove (25).

5. The balanced cage regulating valve according to claim 4, characterized in that: The regulating valve body (1) is provided with a lubrication structure (3), which is mainly composed of a plurality of balls (31), and the plurality of balls (31) are rotatably connected to the regulating valve body (1).

6. The balanced cage type regulating valve according to claim 5, characterized in that: The regulating valve body (1) is provided with an annular groove (32), and a connecting pipe (33) is fixedly connected to the regulating valve body (1), and the connecting pipe (33) is in communication with the annular groove (32).

7. The balanced cage regulating valve according to claim 6, characterized in that: An air bag (34) is fixedly connected to the connecting pipe (33), and the connecting pipe (33) is in communication with the air bag (34).

8. The balanced cage type regulating valve according to claim 7, characterized in that: The air bag (34) is fixedly connected with a liquid injection tube (35), the liquid injection tube (35) is provided with a liquid injection port (36), and a rubber plug (37) is clamped on the liquid injection port (36).

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