Low-noise pneumatic adjusting valve

Abstract

The utility model relates to the technical field of adjusting valves, and discloses a low-noise pneumatic adjusting valve which comprises a pneumatic actuator, an air inlet pipe is fixedly communicated with the upper portion of the pneumatic actuator, filter cotton is arranged in the air inlet pipe, and a fixing frame is fixedly connected with the lower portion of the pneumatic actuator. The lower portion of the fixing frame is fixedly connected with a valve body, the power output end of the pneumatic actuator is fixedly connected with the head end of a valve rod through a shaft sleeve, the valve rod penetrates through the interior of the fixing frame and is arranged in the valve body, the tail end of the valve rod is fixedly connected with a valve element, and the upper side of the interior of the valve body is provided with sealing packing with sealing performance. According to the utility model, dust can be filtered and the noise of compressed air transmission can be reduced through the arrangement of the filter cotton when air enters the valve body through the air inlet pipe, and the sealing filler can be kept in an expansion state all the time when the pressing block extrudes the sealing filler through the arrangement of the pressing plate, so that dust is prevented from being brought in when the valve rod moves vertically, and the sealing performance in the valve body is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of regulating valves, in particular to a low-noise pneumatic regulating valve. Background Art

[0002] A regulating valve, also known as a control valve, is a final control element in the field of industrial automation process control that receives control signals output by a regulating control unit and uses power operation to change process parameters such as medium flow, pressure, temperature, and liquid level. It is generally composed of an actuator and a valve. According to the stroke characteristics, regulating valves can be divided into straight-stroke and angular-stroke valves; according to their functions and characteristics, they can be divided into three types: linear characteristics, equal percentage characteristics, and parabolic characteristics. Regulating valves are suitable for air, water, steam, various corrosive media, mud, oil, and other media. Regulating valves are the most widely used type of final control element and play a very important role in the automatic control of modern factories.

[0003] The existing pneumatic control valve actuator uses compressed air as a power source. The movement of the piston drives the crank arm to rotate 90 degrees to achieve the purpose of automatically opening and closing the valve. The piston movement will generate a lot of noise, and the interior of the valve body is a valve stem that drives the valve core to regulate the flow inside the valve body. The hole opened where the valve core blocks is relatively small. The liquid flowing inside the valve body is likely to cause blockage in the hole, so the fluid needs to be filtered to avoid blockage. Therefore, technical personnel in this field provide a low-noise pneumatic control valve to solve the problems raised in the above background technology. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a low-noise pneumatic regulating valve, which aims to improve the problem that the prior art cannot collect the debris, resulting in the debris floating everywhere.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a low-noise pneumatic regulating valve, comprising a pneumatic actuator, the upper part of the pneumatic actuator is fixedly connected to an air intake pipe, the interior of the air intake pipe is provided with filter cotton, the lower part of the pneumatic actuator is fixedly connected to a fixing frame, the lower part of the fixing frame is fixedly connected to a valve body, the power output end of the pneumatic actuator is fixedly connected to the head end of the valve stem through a shaft sleeve, the valve stem passes through the interior of the fixing frame and is arranged inside the valve body, the end of the valve stem is fixedly connected to a valve core, a sealing packing is provided on the upper side of the interior of the valve body, a pressure block is provided on the upper part of the pressure block, a pressure plate is provided on the upper part of the pressure block, a fixing bolt is provided inside the pressure plate and fixedly matched with the valve body, the external thread of the fixing bolt is connected to an adjusting nut, the external part of the valve body is fixedly connected to a connecting block, and a mounting assembly is provided inside the connecting block.

[0006] Furthermore, the installation assembly includes a frame, which is arranged inside the connecting block, the inside of the frame is fixedly connected to a connecting frame, the inside of the connecting frame is provided with a filter net, the inner bottom of the frame is fixedly connected to a spring, the outside of the spring is fixedly connected to a protrusion, and the upper and lower sides of the inside of the connecting block are provided with card slots.

[0007] Furthermore, stoppers are fixedly connected to the upper and lower sides of the interior of the connection block, and the stoppers are arranged on the inner side of the connection frame.

[0008] Furthermore, the protrusion is slidably connected inside the slot.

[0009] Furthermore, the pressing block is slidably connected to the upper part of the sealing filler.

[0010] Furthermore, a pull rod is fixedly connected to the outside of the frame.

[0011] Furthermore, the valve stem is slidably connected to the interior of the valve body.

[0012] Furthermore, the filter screen is slidably connected inside the connecting block.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the utility model, through the cooperation among the pneumatic actuator, filter cotton, valve body, valve stem, sealing packing, pressure block, fixing bolts and nuts, the filter cotton can filter dust and reduce the noise of compressed air transmission when air is taken in through the air intake pipe. The setting of the pressure plate can keep the sealing packing in an expanded state at all times when the pressure block squeezes the sealing packing to prevent the valve stem from bringing in dust when it moves vertically, thereby ensuring the sealing inside the valve body.

[0015] 2. In the utility model, by cooperating among structures such as the frame, the connecting frame, the connecting block, the protrusion, the spring, the slot, the stopper and the pull rod, it is possible to avoid clogging inside the valve body. The frame is slidably embedded inside the connecting block and can be disassembled. After disassembly, the filter screen inside the frame can be cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of a low-noise pneumatic regulating valve proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of a low-noise pneumatic regulating valve proposed by the utility model;

[0018] Figure 3 A schematic diagram of the structure of a low-noise pneumatic regulating valve proposed by the utility model;

[0019] Figure 4The utility model provides a schematic diagram of the structure of a connecting block of a low-noise pneumatic regulating valve.

[0020] Legend:

[0021] 1. Inlet pipe; 2. Pneumatic actuator; 3. Bushing; 4. Connecting frame; 5. Connecting block; 6. Valve body; 7. Filter cotton; 8. Valve stem; 9. Valve core; 10. Fixing frame; 11. Sealing packing; 12. Pressure block; 13. Fixing bolt; 14. Pressure plate; 15. Nut; 16. Frame; 17. Slot; 18. Bump; 19. Spring; 20. Filter; 21. Pull rod; 22. Stop block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Reference Figure 1 , Figure 2 and Figure 3 , an embodiment provided by the utility model:

[0024] A low-noise pneumatic regulating valve comprises a pneumatic actuator 2, the upper part of the pneumatic actuator 2 is fixedly connected with an air inlet pipe 1, a filter cotton 7 is arranged inside the air inlet pipe 1, the lower part of the pneumatic actuator 2 is fixedly connected with a fixing frame 10, the lower part of the fixing frame 10 is fixedly connected with a valve body 6, the power output end of the pneumatic actuator 2 is fixedly connected with the head end of a valve stem 8 through a shaft sleeve 3, the valve stem 8 penetrates the interior of the fixing frame 10 and is arranged inside the valve body 6, the end of the valve stem 8 is fixedly connected with a valve core 9, a sealing packing 11 is arranged on the upper side of the interior of the valve body 6, a pressing block 12 is arranged on the upper part of the valve body 6, a pressing plate 14 is arranged on the upper part of the pressing block 12, a fixing bolt 13 is arranged inside the pressing plate 14 and fixedly matched with the valve body 6, the external thread of the fixing bolt 13 is connected with an adjusting nut 15, the external part of the valve body 6 is fixedly connected with a connecting block 5, and a mounting assembly is arranged inside the connecting block 5;

[0025] When it is necessary to open the medium channel, the pneumatic actuator 2 is used to drive the valve core 9 to move upward and separate from the valve seat, thereby opening the medium channel. Conversely, when closing the medium channel, the pneumatic actuator 2 can be closed. Due to its own gravity, the valve core 9 will be against the valve seat, thereby closing the medium channel. When air is taken in through the intake pipe 1, the setting of the filter cotton 7 can filter dust and reduce the noise of compressed air transmission. The adjusting nut 15 is threadedly connected with the fixing bolt 13 and drives the pressure plate 14 to move toward the pressure block 12, so that when the pressure block 12 squeezes the sealing packing 11, the sealing packing 11 can be kept in an expanded state at all times to prevent the valve stem 8 from bringing in dust when moving vertically, thereby ensuring the sealing inside the valve body 6.

[0026] Reference Figure 1 and Figure 4 The mounting assembly includes a frame 16, which is arranged inside the connecting block 5, the connecting frame 4 is fixedly connected inside the frame 16, the filter screen 20 is arranged inside the connecting frame 4, the inner bottom of the frame 16 is fixedly connected to a spring 19, the outer side of the spring 19 is fixedly connected to a protrusion 18, and the upper and lower sides of the inner side of the connecting block 5 are provided with a card slot 17;

[0027] When water flows into the valve body 6, the filter screen 20 can filter impurities in the fluid entering the valve body 6 to avoid blockage inside the valve body 6. When the frame 16 slides into the interior of the connecting block 5, the strong spring 19 welded inside the circular hole opened at the top and bottom ends of the frame 16 drives the protrusion 18 to engage with the inside of the slot 17 opened on the inner wall of the connecting block 5 to fix the frame 16.

[0028] The upper and lower sides of the connection block 5 are fixedly connected with stoppers 22, which are arranged on the inner side of the connection frame 4. The protrusion 18 is slidably connected to the inside of the card slot 17. The pressure block 12 is slidably connected to the upper part of the sealing packing 11. The outside of the frame 16 is fixedly connected with a pull rod 21. The valve stem 8 is slidably connected to the inside of the valve body 6. The filter screen 20 is slidably connected to the inside of the connection block 5.

[0029] The block 22 is provided to protect the frame 16 and play a certain fixing role. The frame 16 can be fixed by sliding the protrusion 18 inside the slot 17. The pressure block 12 slides on the upper part of the sealing packing 11, so that the sealing packing 11 can be kept in an expanded state at all times when the pressure block 12 squeezes the sealing packing 11 to prevent the valve stem 8 from bringing in dust when it moves vertically, thereby ensuring the sealing inside the valve body 6. The frame 16 can be taken out from the inside of the connecting block 5 by pulling the pull rod 21, and the frame 16 can be disassembled. The medium channel can be opened and closed by sliding the valve stem 8 inside the valve body 6. The filter screen 20 can slide inside the connecting block 5, so that the filter screen 20 inside the disassembled frame 16 can be cleaned.

[0030] Working principle: When using the device, when it is necessary to open the medium channel, the pneumatic actuator 2 drives the valve core 9 to move upward and separate from the valve seat, thereby opening the medium channel. Conversely, when closing the medium channel, the pneumatic actuator 2 can be closed, and the valve core 9 will be against the valve seat due to its own gravity, thereby closing the medium channel. When air is taken in through the air intake pipe 1, the setting of the filter cotton 7 can filter dust and reduce the noise of compressed air transmission. The setting of the pressure plate 14 allows the sealing packing 11 to remain in an expanded state when the pressure block 12 squeezes the sealing packing 11, preventing the valve stem 8 from bringing in dust when it moves vertically, thereby ensuring the sealing inside the valve body 6. It is vertically embedded in the connecting block 5. There is a frame 16, a connecting frame 4 is arranged inside the frame 16, a filter screen 20 is arranged inside the connecting frame 4, and impurities in the fluid entering the valve body 6 are filtered through the filter screen 20 to avoid blockage inside the valve body 6. When the frame 16 slides to the inside of the connecting block 5, the strong spring 19 welded inside the circular hole that can be opened at the top and bottom ends of the frame 16 drives the protrusion 18 to engage in the inside of the card groove 17 opened on the inner surface wall of the connecting block 5 to fix the frame 16. The frame 16 can be taken out from the inside of the connecting block 5 by pulling the pull rod 21, and the frame 16 can be disassembled. After disassembly, the frame 16 can be cleaned for the filter screen 20 inside.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-noise pneumatic regulating valve, comprising a pneumatic actuator (2), characterized in that: The upper part of the pneumatic actuator (2) is fixedly connected to an air intake pipe (1), a filter cotton (7) is arranged inside the air intake pipe (1), the lower part of the pneumatic actuator (2) is fixedly connected to a fixing frame (10), the lower part of the fixing frame (10) is fixedly connected to a valve body (6), the power output end of the pneumatic actuator (2) is fixedly connected to the head end of the valve stem (8) through a shaft sleeve (3), the valve stem (8) passes through the interior of the fixing frame (10) and is arranged inside the valve body (6), and the end of the valve stem (8) is fixedly connected to the valve body (6). A valve core (9) is provided, a sealing packing (11) is provided on the upper inner side of the valve body (6), a pressure block (12) is provided on the upper part of the valve body (6), a pressure plate (14) is provided on the upper part of the pressure block (12), a fixing bolt (13) is provided inside the pressure plate (14) and is fixedly matched with the valve body (6), the external thread of the fixing bolt (13) is connected to the adjusting nut (15), the external part of the valve body (6) is fixedly connected to the connecting block (5), and the internal part of the connecting block (5) is provided with a mounting assembly.

2. A low-noise pneumatic regulating valve according to claim 1, characterized in that: The mounting assembly comprises a frame (16), the frame (16) being arranged inside a connecting block (5), the frame (16) being fixedly connected to a connecting frame (4) inside, a filter screen (20) being arranged inside the connecting frame (4), a spring (19) being fixedly connected to the inner bottom of the frame (16), a protrusion (18) being fixedly connected to the outside of the spring (19), and slots (17) being provided on the upper and lower sides of the interior of the connecting block (5).

3. A low-noise pneumatic regulating valve according to claim 1, characterized in that: The upper and lower sides of the interior of the connection block (5) are fixedly connected with stoppers (22), and the stoppers (22) are arranged on the inner side of the connection frame (4).

4. A low-noise pneumatic regulating valve according to claim 2, characterized in that: The protrusion (18) is slidably connected inside the slot (17).

5. A low-noise pneumatic regulating valve according to claim 1, characterized in that: The pressing block (12) is slidably connected to the upper part of the sealing filler (11).

6. A low-noise pneumatic regulating valve according to claim 2, characterized in that: A pull rod (21) is fixedly connected to the outside of the frame (16).

7. A low-noise pneumatic regulating valve according to claim 1, characterized in that: The valve stem (8) is slidably connected inside the valve body (6).

8. A low-noise pneumatic regulating valve according to claim 2, characterized in that: The filter screen (20) is slidably connected inside the connection block (5).

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