Energy-saving screw air compressor inlet valve

Abstract

The utility model discloses energy -saving screw rod air compressor admission valve, including valve body, be equipped with the air inlet channel in the valve body, be provided with the air inlet and the air outlet of air inlet channel intercommunication on the valve body, rotatably be provided with the flap at the air inlet, the flap transmission has the cylinder, the cylinder is double pneumatic control cylinder, and the cylinder is used for controlling the rotation angle of flap, and then realizes the control admission of air inlet channel's air inlet opening degree. Its cylinder is double pneumatic control cylinder, and the extension length of piston rod is controlled through the air pressure difference between first chamber and second chamber, and then realizes the control admission of air inlet channel's opening degree, makes the admission amount can according to air compressor actual operation load and system gas demand and carry out the matching. The structure design can avoid the extensive control defect of traditional admission valve " full open or full close ", reduces the admission channel opening degree when the system low load operation, reduces the redundant admission amount, avoids the waste of compressed gas from the source, significantly reduces the air compressor no -load energy consumption and compression power consumption.

Description

Technical Field

[0001] This utility model relates to the field of air compressor intake valve technology, and in particular to an energy-saving screw air compressor intake valve. Background Technology

[0002] In industrial production, screw air compressors are widely used as core power equipment, and their energy consumption has always been a major concern. The intake valve, as a key component of the screw air compressor, directly determines the accuracy of the air intake control and the level of energy efficiency.

[0003] Currently, most screw air compressor intake valves on the market use cylinders to control the opening and closing of the intake channel. For example, a screw air compressor intake valve disclosed in Chinese Utility Model Patent (Authorization Announcement No.: CN201858159U) includes a valve body with an intake port and an outlet. A butterfly valve is located at the upper part of the intake port and connected to the cylinder. A counterweight check valve is located at the lower part of the intake port within the valve body. It also includes a vent valve connected to the cylinder, one end of which is connected to the valve body and communicates with the valve body's internal cavity, and the other end is connected to a solenoid valve. Its working principle is as follows: When the compressor is loaded, the solenoid valve is energized, the cylinder actuates, the butterfly valve fully opens, and the compressor builds pressure. When the compressor is shut down, the solenoid valve is de-energized, the cylinder closes, the butterfly valve closes, and the counterweight check valve quickly closes, thus preventing oil leakage during shutdown.

[0004] However, the intake valve of the screw air compressor disclosed in the aforementioned prior art is limited by its mechanical structure and working principle, and can only achieve two states: opening and closing the intake channel. It cannot precisely adjust the intake volume according to the actual air demand. When the system's required air volume decreases, the air compressor still maintains full-load intake, resulting in the waste of excess compressed gas. This makes it difficult for the screw air compressor to achieve the goal of high efficiency and energy saving in actual operation, resulting in a large amount of energy consumption.

[0005] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0006] The purpose of this utility model is to address the defects and shortcomings of the existing technology by providing an energy-saving screw air compressor intake valve. Its cylinder is a dual-pneumatic control cylinder, which controls the extension length of the piston rod by controlling the pressure difference between the first chamber and the second chamber, thereby achieving precise adjustment of the intake channel opening.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An energy-saving screw air compressor intake valve includes a valve body with an intake channel inside. The valve body has an intake port and an outlet communicating with the intake channel. A flap is rotatably mounted at the intake port. A check valve is mounted below the flap in the intake channel. The flap is driven by a cylinder, which is a dual-pneumatic-controlled cylinder. The cylinder controls the rotation angle of the flap, thereby controlling the intake opening of the intake channel.

[0009] Furthermore, the cylinder includes a cylinder barrel, inside which a piston and a piston rod are disposed. One end of the piston rod is fixedly connected to the piston, and the other end of the piston rod is connected to the flapper drive.

[0010] Furthermore, the piston divides the cylinder cavity into a first chamber and a second chamber, and the cylinder is provided with a first vent hole communicating with the first chamber and a second vent hole communicating with the second chamber.

[0011] Furthermore, a compression spring is fitted around the outer periphery of the piston rod, and the compression spring is positioned between the piston and the cylinder to ensure that the piston rod always has a tendency to retract.

[0012] Furthermore, the flap is provided with air holes.

[0013] Furthermore, the check valve includes a check plate and a counterweight that are fixedly connected. The check plate is hinged to the valve body via a pin, and the counterweight ensures that the check plate always has a tendency to close the air intake passage.

[0014] Furthermore, a vent block is provided on the side of the valve body, a vent valve is provided inside the vent block, the vent block is provided with a vent passage communicating with the air intake passage, and a vent port is provided on the valve body for connecting the vent passage and the air intake passage.

[0015] Furthermore, the venting valve includes a shutdown venting valve and an unloading venting valve, both of which are connected to the venting port through venting passages.

[0016] Furthermore, the air inlet and air outlet are arranged coaxially.

[0017] Furthermore, the flap is fixedly connected to a drive shaft, which is rotatably connected to the valve body. The end of the drive shaft extends out of the valve body and is connected to the piston rod for transmission.

[0018] The beneficial effects of this utility model after adopting the above structure are as follows: The energy-saving screw air compressor intake valve of this utility model includes a valve body, an intake channel is provided in the valve body, an intake port and an outlet communicating with the intake channel are provided on the valve body, a flap is rotatably provided at the intake port, a check valve is provided below the flap in the intake channel, and a cylinder is drivenly connected to the flap. The cylinder is a dual-pneumatic control cylinder, which is used to control the rotation angle of the flap, thereby controlling the intake opening of the intake channel. The cylinder of this utility model is a dual-pneumatic control cylinder, which controls the extension length of the piston rod by controlling the air pressure difference between the first chamber and the second chamber, thereby controlling the opening of the intake channel, so that the intake volume can be matched according to the actual operating load of the air compressor and the air demand of the system. This structural design avoids the crude control defects of traditional intake valves that are "fully open or fully closed". When the system is running at low load, the intake channel opening is reduced to reduce redundant intake volume, thus avoiding the waste of compressed gas from the source and significantly reducing the no-load energy consumption and compression power consumption of the air compressor. When the system is running at high load, the intake channel opening is increased to ensure stable and efficient air supply pressure, thereby improving the economy and reliability of equipment operation. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a cross-sectional view of the overall structure of this utility model. Figure 1 ;

[0022] Figure 3 This is a cross-sectional view of the overall structure of this utility model. Figure 2 ;

[0023] Figure 4 This is a three-dimensional schematic diagram of the cylinder of this utility model;

[0024] Figure 5 This is a cross-sectional view of the cylinder of this utility model;

[0025] Figure 6 This is a three-dimensional schematic diagram of the flip plate of this utility model;

[0026] Figure 7 This is a schematic diagram of the pneumatic control principle of this utility model.

[0027] Figures 1 to 7 The winning number is:

[0028] 1. Valve body; 11. Inlet passage; 12. Inlet port; 13. Outlet port; 14. Vent port; 2. Flip plate; 21. Air hole; 22. Drive shaft; 3. Check valve; 31. Check plate; 32. Counterweight; 33. Pin; 4. Cylinder; 41. Cylinder barrel; 411. First chamber; 412. Second chamber; 413. First air hole; 414. Second air hole; 42. Piston; 43. Piston rod; 44. Compression spring; 5. Vent block; 51. Vent passage; 6. Vent valve; 61. Shutdown vent valve; 62. Unloading vent valve; 100. Inlet valve; 200. Air filter; 300. Machine head; 400. Oil separator tank. Detailed Implementation

[0029] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0030] In the description of this utility model, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, the term "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In this utility model, unless otherwise explicitly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this invention are for illustrative purposes only and do not represent the only possible implementation.

[0035] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] like Figures 1 to 7As shown, the energy-saving screw air compressor intake valve includes a valve body 1, which has an intake channel 11. The valve body 1 has an intake port 12 and an outlet 13 communicating with the intake channel 11. A flap 2 is rotatably mounted at the intake port 12. A check valve 3 is located below the flap 2 within the intake channel 11. A cylinder 4 is drivenly connected to the flap 2. The cylinder 4 is a dual-pneumatic-controlled cylinder, used to control the rotation angle of the flap 2, thereby controlling the intake opening of the intake channel 11. The intake port 12 is connected to the atmosphere, and the outlet 13 is connected to the compressor head 300. A drive shaft 22 is fixedly connected to the flap 2, and the drive shaft 22 is rotatably connected to the valve body 1. The end of the drive shaft 22 extends out of the valve body 1 and is drivenly connected to a piston rod 43.

[0037] Based on the above embodiments, the present invention aims to provide an energy-saving screw air compressor intake valve, including a valve body 1. The valve body 1 has an intake channel 11, an intake port 12 and an outlet 13 communicating with the intake channel 11. A flap 2 is rotatably mounted at the intake port 12. A check valve 3 is located below the flap 2 within the intake channel 11. A cylinder 4 is drivenly connected to the flap 2. The cylinder 4 is a dual-pneumatic-controlled cylinder, used to control the rotation angle of the flap 2, thereby controlling the intake opening of the intake channel 11. The cylinder 4 of this invention is a dual-pneumatic-controlled cylinder, controlling the extension length of the piston rod 43 by controlling the pressure difference between the first chamber 411 and the second chamber 412. This not only enables the opening and closing of the intake valve 100 but also allows for the adjustment of the intake channel 11 opening, enabling the intake volume to be matched according to the actual operating load of the air compressor and the system's air demand. Specifically, such as Figure 5 As shown, when the system is operating at low load, the gas introduced through the second vent 414 is slightly greater than the gas introduced through the first vent 413, resulting in a slightly higher air pressure in the second chamber 412 than in the first chamber 411. The piston rod 43 extends a shorter distance, driving the drive shaft 22 to rotate. The drive shaft 22 then rotates the flap 2 by a small angle, resulting in a smaller opening in the intake channel 11. This reduces redundant intake volume, preventing waste of compressed gas at the source and significantly reducing the compressor's no-load energy consumption and compression power consumption. When the system is operating at high load, the gas introduced through the second vent 414 is increased, increasing the pressure difference between the second chamber 412 and the first chamber 411. This causes the piston 42 to move upwards under the pressure thrust, driving the piston rod 43 to extend a longer distance. The piston rod 43 then drives the drive shaft 22 to rotate, which in turn rotates the flap 2 by a larger angle, increasing the opening of the intake channel 11 and ensuring stable and efficient air supply pressure. This structural design avoids the crude control defects of the traditional intake valve 100's "fully open or fully closed" operation, improving the economy and reliability of equipment operation.

[0038] In another preferred embodiment of this utility model, the cylinder 4 includes a cylinder barrel 41, within which a piston 42 and a piston rod 43 are disposed. One end of the piston rod 43 is fixedly connected to the piston 42, and the other end of the piston rod 43 is kinetically connected to the flap 2. The piston 42 divides the inner cavity of the cylinder barrel 41 into a first chamber 411 and a second chamber 412. The cylinder barrel 41 is provided with a first air hole 413 communicating with the first chamber 411 and a second air hole 414 communicating with the second chamber 412. A compression spring 44 is sleeved around the outer periphery of the piston rod 43, and the compression spring 44 abuts against the piston 42 and the cylinder barrel 41, so that the piston rod 43 always has a tendency to retract. In this embodiment, as... Figure 4 and Figure 5 As shown, the movement of piston 42 is controlled by controlling the pressure difference between the first chamber 411 and the second chamber 412, which in turn controls the extension of piston rod 43. Piston rod 43 drives transmission shaft 22 to rotate, which in turn drives flap 2 to rotate. A compression spring 44 is sleeved on the outer periphery of piston rod 43. The compression spring 44 abuts against piston 42 and cylinder 41. When piston rod 43 extends, piston 42 compresses compression spring 44; when piston rod 43 retracts, compression spring 44 drives piston 42 to return to its original position. By setting compression spring 44, the piston 42 can be quickly returned to its original position.

[0039] As another preferred embodiment of this utility model, the flap 2 is provided with air holes 21. In this embodiment, as... Figure 6 As shown, when the air compressor head 300 connected to the intake valve 100 starts, air enters through the air hole 21 of the flap 2, reducing the starting load and establishing internal pressure in the system.

[0040] As another preferred embodiment of this utility model, the check valve 3 includes a check plate 31 and a counterweight 32 fixedly connected. The check plate 31 is hinged to the valve body 1 via a pin 33, and the counterweight 32 ensures that the check plate 31 always has a tendency to close the air intake passage 11. In this embodiment, as... Figure 2 As shown, the check valve 3 is a counterweight check valve 3. During the operation of the air compressor, the counterweight check valve 3 can prevent compressed air from flowing back from the outlet 13 side to the inlet 12 side. This ensures that the compressed air flows in the correct direction, guarantees the normal operation cycle of the air compressor, and avoids affecting the compression efficiency and performance of the air compressor due to gas backflow. The check plate 31 is hinged to the valve body 1 by a pin 33. Under the gravity of the counterweight 32, the check plate 31 closes the inlet passage 11; when compressed gas is introduced into the inlet 12, the check plate 31 overcomes the gravity of the counterweight 32 under the thrust of the compressed air and opens the inlet passage 11.

[0041] As another preferred embodiment of this utility model, a vent block 5 is provided on the side of the valve body 1, a vent valve 6 is provided inside the vent block 5, the vent block 5 is provided with a vent passage 51 communicating with the air intake passage 11, and a vent port 14 is provided on the valve body 1 for connecting the vent passage 51 and the air intake passage 11. The vent valve 6 includes a shutdown vent valve 61 and an unloading vent valve 62, both of which are connected to the vent port 14 through the vent passage 51. The shutdown vent valve 61 and the unloading vent valve 62 are arranged in parallel between the air filter 200 and the oil separator 400 of the air compressor, and the unloading vent block 5 is connected to the cylinder 4 through a connecting air pipe. In this embodiment, as... Figure 3 and Figure 7 As shown, the unloading vent valve 62 is used to discharge gas during unloading: when the air compressor is in the unloading operation state, the intake valve 100 is closed, while the unloading vent valve 62 is open. At this time, it will quickly discharge the compressed air remaining in the air compressor intake passage 11 into the atmosphere. This eliminates the pressure in the intake passage 11, so that the intake valve 100 can open more easily when it needs to be loaded again, avoiding difficulty in opening the intake valve 100 or malfunction due to pressure in the intake passage 11, ensuring that the air compressor can enter the loading operation state in a timely and smooth manner to meet the needs of the air-using equipment. The shutdown vent valve 61 is used to discharge gas during shutdown: when the air compressor stops, the shutdown vent valve 61 opens quickly, rapidly discharging the compressed air inside the air compressor and in the pipeline connected to the air compressor into the atmosphere. This can prevent the continuous pressure on the air compressor components due to the presence of compressed air pressure in the pipeline after shutdown, preventing the components from deforming, leaking, or being damaged due to prolonged pressure, and extending the service life of the equipment. Both the unloading vent valve 62 and the shutdown vent valve 61 are connected to the intake channel 11 through the vent passage 51 and the vent port 14.

[0042] In another preferred embodiment of this utility model, the air inlet 12 and the air outlet 13 are coaxially arranged. In this embodiment, as... Figure 2 As shown, the air inlet 12 and the air outlet 13 are coaxial, which simplifies the structure of the air inlet valve 100.

[0043] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. An energy-saving screw air compressor intake valve, comprising a valve body (1), wherein the valve body (1) is provided with an intake channel (11), and the valve body (1) is provided with an intake port (12) and an outlet port (13) communicating with the intake channel (11), wherein a flap (2) is rotatably provided at the intake port (12), and a check valve (3) is provided below the flap (2) in the intake channel (11), and a cylinder (4) is drivenly connected to the flap (2), characterized in that: The cylinder (4) is a dual-pneumatic cylinder (4), which is used to control the rotation angle of the flap (2), thereby controlling the air intake opening of the air intake channel (11).

2. The energy-saving screw air compressor inlet valve according to claim 1, characterized in that: The cylinder (4) includes a cylinder barrel (41), a piston (42) and a piston rod (43) are provided inside the cylinder barrel (41), one end of the piston rod (43) is fixedly connected to the piston (42), and the other end of the piston rod (43) is connected to the flap (2) for transmission.

3. The energy-saving screw air compressor inlet valve according to claim 2, characterized in that: The piston (42) divides the inner cavity of the cylinder (41) into a first chamber (411) and a second chamber (412). The cylinder (41) is provided with a first vent (413) communicating with the first chamber (411) and a second vent (414) communicating with the second chamber (412).

4. The energy-saving screw air compressor inlet valve according to claim 3, characterized in that: A compression spring (44) is fitted around the outer periphery of the piston rod (43). The compression spring (44) abuts against the piston (42) and the cylinder (41) so that the piston rod (43) always has a tendency to retract.

5. The energy-saving screw air compressor inlet valve according to claim 1, characterized in that: The flap (2) is provided with air holes (21).

6. The energy-saving screw air compressor inlet valve according to claim 1, characterized in that: The check valve (3) includes a check plate (31) and a counterweight (32) that are fixedly connected. The check plate (31) is hinged to the valve body (1) by a pin (33). The counterweight (32) makes the check plate (31) always have a tendency to close the air intake passage (11).

7. The energy-saving screw air compressor inlet valve according to claim 1, characterized in that: A vent block (5) is provided on the side of the valve body (1), a vent valve (6) is provided inside the vent block (5), a vent passage (51) is provided in the vent block (5) and a vent port (14) is provided on the valve body (1) for connecting the vent passage (51) and the air intake passage (11).

8. The energy-saving screw air compressor inlet valve according to claim 7, characterized in that: The vent valve (6) includes a shutdown vent valve (61) and an unloading vent valve (62), both of which are connected to the vent port (14) through a vent passage (51).

9. The energy-saving screw air compressor inlet valve according to claim 1, characterized in that: The air inlet (12) and the air outlet (13) are arranged coaxially.

10. The energy-saving screw air compressor inlet valve according to claim 1, characterized in that: The flap (2) is fixedly connected to a drive shaft (22), which is rotatably connected to the valve body (1). The end of the drive shaft (22) extends out of the valve body (1) and is connected to the piston rod (43) for transmission.

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