Variable control valve for compressor

Abstract

The utility model discloses a variable control valve for a compressor, which belongs to the technical field of variable control valves and comprises a valve body, an inlet pipe is arranged at one end of the valve body, an outlet pipe is arranged at the other end of the valve body, and an air pressure sensor is mounted at the upper end of the outlet pipe. A limiting sliding cavity is formed in the valve seat, a valve element is installed in the limiting sliding cavity in a sliding mode, a valve plate is fixedly installed at the bottom of the valve element, a toothed bar is installed at the bottom of the valve plate, and the upper end of the toothed bar is rotationally connected with the valve plate. The sealing seat is arranged in the valve body, a through hole in the sealing seat is matched with the valve plate in a clamped mode, a filter screen is fixedly installed in the sealing seat, a self-cleaning assembly is arranged below the filter screen, impurities attached to the filter screen are cleaned in the working process of the variable control valve, and the problem that the filter screen is damaged due to the fact that the variable control valve is used for a long time is solved. And impurities generated inside easily influence the normal work and the sealing performance of the valve.

Description

Technical Field

[0001] The utility model relates to the technical field of variable control valves, and specifically relates to a variable control valve for a compressor. Background Technique

[0002] A variable control valve for a compressor is a control device used to adjust the exhaust volume of the compressor. This kind of valve is usually applied in a variable-frequency compressor system. By adjusting the exhaust volume of the compressor to adapt to the actual demand, energy conservation and optimized operation can be achieved. According to the actual demand of the system, the exhaust volume of the compressor is adjusted to avoid the low-efficiency operation of the compressor under low load and improve the energy utilization efficiency. By adjusting the exhaust volume, the energy consumption of the compressor can be reduced and the operation cost can be lowered. When the system load changes, the variable control valve can respond quickly to keep the system running stably. The working principle of the variable control valve is usually to adjust the cross-sectional area of the compressor exhaust passage to achieve the adjustment of the exhaust volume.

[0003] In the prior art for the adjustment of the compressor exhaust volume, during the use of the variable control valve, problems such as valve core jamming and sealing surface wear may occur due to impurities, particulate matter and other contaminants in the medium, which will affect the normal operation and sealing performance of the valve. Therefore, it does not meet the existing requirements, and a variable control valve for a compressor is proposed for this. Content of the Utility Model

[0004] The purpose of the utility model is to provide a variable control valve for a compressor to solve the problem that impurities generated inside the variable control valve during long-term use are likely to affect the normal operation and sealing performance of the valve as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A variable control valve for a compressor, including a valve body, one end of the valve body is provided with an inlet pipe, the other end of the valve body is provided with an outlet pipe, and a pressure sensor is installed at the upper end of the outlet pipe; further including:

[0006] A valve seat, a limiting sliding cavity is arranged inside the valve seat, a valve core is slidably installed inside the limiting sliding cavity, a valve plate is fixedly installed at the bottom of the valve core, a rack is installed at the bottom of the valve plate, and the upper end of the rack is rotatably connected to the valve plate;

[0007] A sealing seat, which is arranged inside the valve body, and the through hole in the sealing seat is clamped and matched with the valve plate. A filter screen is fixedly installed inside the sealing seat, and a self-cleaning component is arranged below the filter screen to clean the impurities attached to the filter screen during the working process of the variable control valve.

[0008] Preferably, the variable control valve includes a self-cleaning component provided for cleaning impurities on the filter screen. The self-cleaning component includes a fixed rod fixedly installed at the bottom of the inner cavity of the valve body. Above the fixed rod, a first rotating rod is rotatably installed. An impeller is fixedly arranged on the outer part of the first rotating rod, and the impeller is located at the lower end of the through hole of the sealing seat. Above the first rotating rod, a second rotating rod is installed, and the second rotating rod is connected to the first rotating rod through a bearing. On both sides of the outer part of the second rotating rod, brushes are fixedly arranged, and the upper ends of the brushes are in contact with the filter screen.

[0009] Preferably, annular tooth grooves are arranged inside both the first rotating rod and the second rotating rod, and the annular tooth grooves are in clamping fit with the tooth rod.

[0010] Preferably, a servo motor is fixedly installed at the upper end of the valve body. The output shaft of the servo motor is provided with a threaded pipe, and the lower end of the threaded pipe extends into the inside of the valve core, and the external thread of the threaded pipe is adapted to the internal thread hole of the valve core.

[0011] Preferably, the output end of the air pressure sensor is connected to the controller, and the output end of the controller is connected to the servo motor.

[0012] Preferably, a collection groove is arranged at the bottom of the valve body. The collection groove is in an inverted conical structure, and a leakage hole is arranged at the bottom of the collection groove. An adjusting nut is installed at the lower end of the leakage hole, and the adjusting nut is in threaded connection with the leakage hole.

[0013] Preferably, flange plates are fixedly welded on the outer sides of both the inlet pipe and the outlet pipe.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. By providing an air pressure sensor on the outlet pipe, the present utility model can monitor the gas pressure in the outlet pipe in real time, convert the pressure value into an electrical signal for the controller to obtain in real time. Based on the feedback signal of the air pressure sensor, the controller can accurately adjust the opening degree of the variable control valve. By starting the servo motor, its output shaft drives the threaded pipe to rotate. Under the friction with the internal thread hole of the valve core and in cooperation with the guiding function of the limiting sliding cavity on the valve core, the valve core drives the valve plate to move up and down, adjusting the change of the opening degree of the sealing seat, thereby controlling the output flow and pressure of the compressor. When external conditions change, the controller will adjust the control signal in real time, enabling the variable control valve to quickly respond and adjust the output of the compressor. By adjusting the opening degree of the variable control valve in real time, the system can quickly respond to changes in external conditions, such as load fluctuations and changes in gas demand. This fast response ability helps to maintain the stable operation of the system, reduce equipment failures or performance degradation caused by pressure fluctuations, and thus improve the overall reliability and stability of the system.

[0016] 2. The utility model is provided with a self-cleaning mechanism. The filter screen in the inner cavity of the sealing seat can block impurities in the passing medium. When the sealing seat and the valve plate maintain a high opening degree, the tooth bar is separated from the annular tooth groove in the first rotating rod. At this time, when the medium passes through the sealing seat, it interacts with the impeller and drives the impeller to rotate. As the air pressure sensor transmits a signal and the opening degree of the sealing seat and the valve plate is reduced through the controller, the valve plate drives the tooth bar to enter the first rotating rod from the second rotating rod. Under the limitation of the annular tooth grooves inside the two rotating rods, the tooth bar simultaneously forms a clamping on the first rotating rod and the second rotating rod. The rotational force is transmitted to the first rotating rod through the second rotating rod to drive the external brush to rotate synchronously. Under the friction action, the brush can clean the impurities on the filter screen, ensuring the normal transmission of the medium on the premise of maintaining the filtering performance. When the variable control valve stops working, the impurities accumulate in the collection tank due to gravity. The staff can open the adjusting nut to let the impurities drain out by themselves. The filter screen in the inner cavity of the sealing seat can effectively block impurities in the medium, ensuring the quality of the medium passing through the valve, which is crucial for protecting subsequent equipment and maintaining the stable operation of the system. At the same time, since the filter screen can continuously maintain a clean state, it avoids problems such as blockage or damage caused by impurity accumulation, thereby extending the service life of the filter screen and the entire valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional view of the utility model;

[0018] Figure 2 is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 is of the utility model Figure 2 partial enlarged view of area A in;

[0020] Figure 4 is a schematic diagram of the bottom structure of the inner cavity of the valve body of the utility model.

[0021] In the figure: 1, valve body; 2, inlet pipe; 3, outlet pipe; 4, flange; 5, air pressure sensor; 6, valve seat; 7, servo motor; 8, adjusting nut; 9, limiting sliding cavity; 10, threaded pipe; 11, valve core; 12, valve plate; 13, sealing seat; 14, fixed rod; 15, filter screen; 16, tooth bar; 17, first rotating rod; 18, second rotating rod; 19, annular tooth groove; 20, impeller; 21, brush; 22, collection tank; 23, leakage hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the accompanying drawings of the specification. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments.

[0023] Please refer to Figures 1-4, an embodiment provided by the present utility model: a variable control valve for a compressor, comprising a valve body 1, an inlet pipe 2 is provided at one end of the valve body 1, an outlet pipe 3 is provided at the other end of the valve body 1, a pressure sensor 5 is installed at the upper end of the outlet pipe 3, and flange plates 4 are welded and fixed on the outer sides of the inlet pipe 2 and the outlet pipe 3; further comprising:

[0024] A valve seat 6, a limiting sliding cavity 9 is arranged inside the valve seat 6, a valve core 11 is slidably installed inside the limiting sliding cavity 9, a valve plate 12 is fixedly installed at the bottom of the valve core 11, a toothed rod 16 is installed at the bottom of the valve plate 12, and the upper end of the toothed rod 16 is rotatably connected to the valve plate 12;

[0025] A sealing seat 13, which is arranged inside the valve body 1, and the through hole in the sealing seat 13 is in clamping fit with the valve plate 12. A filter screen 15 is fixedly installed inside the sealing seat 13, and a self-cleaning component is arranged below the filter screen 15 to clean the impurities attached to the filter screen 15 during the operation of the variable control valve.

[0026] The filter screen 15 in the inner cavity of the sealing seat 13 can effectively block the impurities in the medium, ensuring the quality of the medium passing through the valve, which is crucial for protecting subsequent equipment and maintaining the stable operation of the system. At the same time, since the filter screen 15 can continuously maintain a clean state, it avoids problems such as blockage or damage caused by impurity accumulation, thereby extending the service life of the filter screen and the entire valve.

[0027] Please refer to Figure 2 、 Figure 3 and Figure 4, the self-cleaning component includes a fixing rod 14, the fixing rod 14 is fixedly installed at the bottom of the inner cavity of the valve body 1, a first rotating rod 17 is rotatably installed above the fixing rod 14, an impeller 20 is fixedly arranged outside the first rotating rod 17, and the impeller 20 is located at the lower end of the through hole of the sealing seat 13. A second rotating rod 18 is installed above the first rotating rod 17, and the second rotating rod 18 is connected to the first rotating rod 17 through a bearing. Brushes 21 are fixedly arranged on both sides outside the second rotating rod 18, and the upper ends of the brushes 21 are in contact with the filter screen 15. Annular tooth grooves 19 are arranged inside both the first rotating rod 17 and the second rotating rod 18, and the annular tooth grooves 19 are in clamping fit with the tooth rod 16. When the sealing seat 13 and the valve plate 12 are at a high opening degree, the tooth rod 16 is separated from the annular tooth groove 19 in the first rotating rod 17. At this time, when the medium passes through the sealing seat 13, it interacts with the impeller, driving the impeller 20 to rotate. As the pressure sensor 5 transmits a signal and the controller reduces the opening degree of the sealing seat 13 and the valve plate 12, the valve plate 12 drives the tooth rod 16 to enter the first rotating rod 17 from the second rotating rod 18. Under the limitation of the annular tooth grooves 19 inside the two rotating rods, the tooth rod 16 simultaneously forms a clamping on the first rotating rod 17 and the second rotating rod 18. The rotational force is transmitted from the first rotating rod 17 to the second rotating rod 18, driving the external brushes 21 to rotate synchronously. Under the frictional action, the brushes 21 can clean the impurities on the filter screen 15, ensuring the normal transportation of the medium while maintaining the filtering performance.

[0028] Please refer to Figure 2 , a servo motor 7 is fixedly installed at the upper end of the valve body 1. The output shaft of the servo motor 7 is equipped with a threaded pipe 10. The lower end of the threaded pipe 10 extends into the inside of the valve core 11, and the external thread of the threaded pipe 10 is adapted to the internal thread hole of the valve core 11. The output end of the pressure sensor 5 is connected to the controller, and the output end of the controller is connected to the servo motor 7. By adjusting the opening degree of the variable control valve in real time, the system can quickly respond to changes in external conditions, such as load fluctuations and changes in gas demand. This rapid response ability helps to maintain the stable operation of the system, reduce equipment failures or performance degradation caused by pressure fluctuations, thereby improving the overall reliability and stability of the system.

[0029] Please refer to Figure 2 and Figure 4 , a collection tank 22 is arranged at the bottom of the valve body 1. The collection tank 22 has an inverted conical structure, and a leakage hole 23 is provided at the bottom of the collection tank 22. An adjusting nut 8 is installed at the lower end of the leakage hole 23, and the adjusting nut 8 is threadedly connected to the leakage hole 23. When the variable control valve stops working, the impurities accumulate in the collection tank 22 due to gravity. The staff can open the adjusting nut 8 to let the impurities drain out by themselves.

[0030] Working principle: During use, the air pressure sensor 5 monitors the gas pressure in the pipe in real time, converts the pressure value into an electrical signal for the controller to obtain in real time. Based on the feedback signal of the air pressure sensor 5, the controller is used to adjust the opening of the variable control valve. By starting the servo motor 7, its output shaft drives the threaded pipe 10 to rotate. Under the friction with the internal threaded hole of the valve core 11 and in cooperation with the guiding effect of the limiting sliding cavity 9 on the valve core 11, the valve core 11 drives the valve plate 12 to move up and down, adjusting the change in the opening of the sealing seat 13, thereby controlling the output flow and pressure of the compressor. When external conditions change, the controller will adjust the control signal in real time so that the variable control valve can quickly respond and adjust the output of the compressor.

Claims

1. A variable control valve for a compressor, comprising a valve body (1), one end of the valve body (1) being provided with an inlet pipe (2), the other end of the valve body (1) being provided with an outlet pipe (3), the upper end of the outlet pipe (3) being provided with an air pressure sensor (5); Features: Also includes: A valve seat (6), wherein a limited sliding cavity (9) is arranged inside the valve seat (6), a valve core (11) is slidably mounted inside the limited sliding cavity (9), a valve plate (12) is fixedly mounted at the bottom of the valve core (11), a gear rod (16) is mounted at the bottom of the valve plate (12), and the upper end of the gear rod (16) is rotatably connected to the valve plate (12); A sealing seat (13) is arranged inside the valve body (1), and a through hole in the sealing seat (13) is snap-fitted with the valve plate (12). A filter screen (15) is fixedly installed inside the sealing seat (13), and a self-cleaning component is arranged below the filter screen (15) to clean impurities attached to the filter screen (15) during the operation of the variable control valve.

2. The variable control valve for a compressor according to claim 1, characterized in that: The variable control valve comprises a self-cleaning component for cleaning impurities on a filter screen (15), comprising a fixed rod (14), the fixed rod (14) being fixedly mounted on the bottom of the inner cavity of a valve body (1), a first rotating rod (17) being rotatably mounted above the fixed rod (14), an impeller (20) being fixedly mounted outside the first rotating rod (17), and the impeller (20) being located at the lower end of a through hole of a sealing seat (13), a second rotating rod (18) being mounted above the first rotating rod (17), and the second rotating rod (18) being connected to the first rotating rod (17) via a bearing, brushes (21) being fixedly mounted on both sides of the outside of the second rotating rod (18), and the upper ends of the brushes (21) being in contact with the filter screen (15).

3. The variable control valve for a compressor according to claim 2, characterized in that: An annular tooth groove (19) is provided inside the first rotating rod (17) and the second rotating rod (18), and the annular tooth groove (19) is engaged with the toothed rod (16).

4. The variable control valve for a compressor according to claim 1, characterized in that: A servo motor (7) is fixedly mounted on the upper end of the valve body (1), and a threaded tube (10) is mounted on the output shaft of the servo motor (7). The lower end of the threaded tube (10) extends to the interior of the valve core (11), and the external thread of the threaded tube (10) is matched with the internal thread hole of the valve core (11).

5. The variable control valve for a compressor according to claim 1, characterized in that: The output end of the air pressure sensor (5) is connected to a controller, and the output end of the controller is connected to a servo motor (7).

6. The variable control valve for a compressor according to claim 1, characterized in that: The bottom of the valve body (1) is provided with a collecting groove (22), the collecting groove (22) is in an inverted cone structure, and the bottom of the collecting groove (22) is provided with a leakage hole (23), the lower end of the leakage hole (23) is installed with an adjusting nut (8), and the adjusting nut (8) is threadedly connected to the leakage hole (23).

7. The variable control valve for a compressor according to claim 1, characterized in that: Flange plates (4) are welded and fixed to the outer sides of the inlet pipe (2) and the outlet pipe (3).

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