Oil-gas separation cylinder

Abstract

The oil-gas separation barrel comprises a barrel cover and a barrel body with an opening in the upper end, the barrel body comprises a barrel body and a bottom plate arranged at the bottom end of the barrel body, a liquid outlet is formed in the bottom of the barrel body, and the side, close to the liquid outlet, of the bottom plate inclines downwards; and a liquid baffle is arranged on the inner wall of the lower part of the cylinder body, is provided with liquid leakage holes, and is positioned above the bottom plate. The liquid baffle is arranged at the bottom of the barrel, the liquid leakage holes are formed in the liquid baffle, separated oil flows into the bottom of the barrel through the liquid leakage holes, so that accumulated oil is accumulated below the liquid baffle, and airflow enters the oil-gas separation barrel and does not make large-area contact with the accumulated oil at the bottom of the barrel. The problem that the oil content in the exhausted compressed air is too high due to the fact that oil accumulated at the bottom of the oil-gas separator is easily involved in the compressed air by airflow when reaching a certain amount is solved; oil and water in airflow are preliminarily separated under the action of centrifugal force and then enter the filter element from the lower end of the cyclone cylinder to be separated. And the oil-gas separation efficiency is further improved.

Description

Technical Field

[0001] This utility model relates to the field of oil-gas separator technology, and in particular to an oil-gas separator cylinder. Background Technology

[0002] The oil-gas separator in an air compressor is a key component determining the quality of compressed air. A high-quality oil-gas separator not only ensures high-quality, pure compressed air but also effectively guarantees the efficient operation of the air compressor. The main function of the oil-gas separator is to separate lubricating oil from the compressed air, ensuring that the purity of the discharged compressed air meets standards. By intercepting and aggregating oil mist in the gas, some oil droplets concentrate at the bottom of the filter element and return to the compressor lubrication system through the oil return pipe, while some oil concentrates at the bottom of the oil-gas separator and returns to the refrigerated dryer through the oil return pipe, thus ensuring that the compressor can discharge purer, higher-quality compressed air. However, when oil accumulates to a certain amount at the bottom of the existing oil-gas separator, the airflow entering the separator will entrain the accumulated oil into the compressed air, resulting in excessively high oil content in the discharged compressed air.

[0003] For example, Chinese Patent Publication No. CN212055127U, published on December 1, 2020, entitled "An Oil-Gas Separator for a Screw Air Compressor", includes a cylinder body. An air inlet pipe is welded to the outer wall of the cylinder body. The air inlet pipe extends horizontally into the cylinder body and is located in the tangential direction of the cylinder body. An arc-shaped baffle is provided in the cylinder body near the outlet end of the air inlet pipe. The center of the arc of the arc-shaped baffle is located on the vertical center line of the cylinder body. Several baffles are fixedly provided between the inner wall of the cylinder body and the outer wall of the arc-shaped baffle. The baffles are arranged in an arc shape and staggered vertically. A cylinder cover is fixedly provided on the top of the cylinder body. A filter basket is fixedly provided through the center of the cylinder cover. An oil-gas separation filter element is provided in the filter basket.

[0004] The drawback of existing patents is that when oil accumulates to a certain amount at the bottom of the existing oil-gas separator, the airflow entering the separator will entrain the accumulated oil into the compressed air, resulting in excessively high oil content in the discharged compressed air. Utility Model Content

[0005] The purpose of this invention is to improve the problem that when oil accumulates at the bottom of the existing oil-gas separator to a certain extent, it is easily drawn into the compressed air by the airflow, resulting in an excessively high oil content in the discharged compressed air. This invention provides an oil-gas separator cylinder that reduces the amount of oil accumulated at the bottom of the oil-gas separator from being drawn into the compressed air.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An oil-gas separator cylinder includes a cylinder cover and a cylinder body with an open top. The cylinder body includes a cylinder frame and a bottom plate located at the bottom of the cylinder frame. A drain port is provided at the bottom of the cylinder body, and the bottom plate is inclined downwards on the side near the drain port. A baffle plate with a leakage hole is provided on the lower inner wall of the cylinder body, and the baffle plate is located above the bottom plate. In this oil-gas separator cylinder, the baffle plate at the bottom of the cylinder body with the leakage hole allows the separated oil to flow into the bottom of the cylinder body through the leakage hole, causing the accumulated oil to accumulate below the baffle plate. This prevents the airflow entering the oil-gas separator cylinder from coming into large-area contact with the accumulated oil at the bottom of the cylinder body, thus improving the problem that when the oil-gas separator accumulates to a certain amount at the bottom, it is easily drawn into the compressed air by the airflow, resulting in excessively high oil content in the discharged compressed air. The inclined bottom plate of the cylinder body is lower in manufacturing cost and easier to manufacture than the cover in the prior art, and also facilitates the drainage of accumulated oil.

[0008] Preferably, the baffle is angled, and its outer edge is connected to the inner wall of the cylinder. The angled arrangement of the baffle prevents oil accumulation on it.

[0009] Preferably, the side of the baffle plate with the drain hole is inclined downwards. This allows oil on the baffle plate to flow into the drain hole, causing the oil to accumulate at the bottom of the cylinder.

[0010] Preferably, the outer edge of the baffle plate is provided with a notch, and the leakage hole is formed by the notch and the inner wall of the cylinder. The notch is easier to process, has lower processing costs, and a simpler structure.

[0011] Preferably, the cylinder is provided with a support plate for supporting the filter element. The support plate divides the cylinder into an upper cavity and a lower cavity. The lower cavity has an inlet, and the upper cavity has an outlet. The baffle plate is located below the support plate. The support plate supports the filter element, which is positioned above or below the support plate. When the filter element is positioned above the support plate, its opening faces downward and its inner cavity communicates with the lower cavity. When the filter element is positioned below the support plate, its opening faces upward and its inner cavity communicates with the upper cavity.

[0012] Preferably, the support plate is angled, with the side of the support plate near the inlet tilting upwards, and the inlet located at the upper part of the lower cavity. When the filter element is placed above the support plate, the filter element opening faces downwards and the inner cavity of the filter element communicates with the lower cavity. Oil is prone to accumulate on the support plate, and an oil drain port located at the bottom of the upper cavity is provided on the side wall of the cylinder. The angled support plate allows the accumulated oil on the support plate to be discharged out of the cylinder through the oil drain port.

[0013] Preferably, the support plate and the baffle plate are inclined in opposite directions, and the inlet is located above the leakage hole.

[0014] Preferably, a vertically extending cyclone separator is provided below the support plate, with its upper end connected to the lower end face of the support plate. The inlet is located on the outside of the cyclone separator. With the cyclone separator positioned at the inlet, airflow enters the lower cavity from the inlet and rotates along the cyclone separator. Under centrifugal force, oil and water in the airflow are initially separated, and then enter the filter element for further separation from the lower end of the cyclone separator. This further improves the oil-gas separation efficiency.

[0015] Preferably, the vortex tube and the tube body are arranged coaxially.

[0016] Preferably, the cap is rotatably mounted on the open end of the cylinder body via a rotating component, and the cap and cylinder body are fixed together by a locking component. The cap is rotated to the open end of the cylinder body and fixed thereto by the locking component.

[0017] Therefore, this utility model has the following beneficial effects: A baffle plate with leakage holes is provided at the bottom of the cylinder. The separated oil flows into the bottom of the cylinder through the leakage holes, causing the accumulated oil to accumulate below the baffle plate. This prevents the airflow entering the oil-gas separator from coming into large-area contact with the accumulated oil at the bottom of the cylinder, thus improving the problem that when a certain amount of oil accumulates at the bottom of the oil-gas separator, it is easily drawn into the compressed air by the airflow, resulting in excessively high oil content in the discharged compressed air. The oil and water in the airflow are initially separated under centrifugal force and then enter the filter element for further separation from the bottom of the cyclone separator. This further improves the oil-gas separation efficiency. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of a utility model that includes multiple filter elements.

[0019] Figure 2 This is another cross-sectional view of the present invention, which includes multiple filter elements.

[0020] Figure 3 This is a cross-sectional view of a single filter element in this utility model.

[0021] Figure 4 This is a cross-sectional view of two oil-gas separators connected in parallel in this utility model.

[0022] As shown in the picture:

[0023] Cylinder body 1, cylinder body 1.1, bottom plate 1.2

[0024] Cylinder cover 2, drain port 3,

[0025] 4. Liquid baffle plate, 4.1. Leakage hole

[0026] 5. Support plate; 6. Inlet; 7. Outlet; 8. Swirl tube. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the utility model will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0028] Example 1, as Figure 1 , Figure 2 , Figure 3 , Figure 4 An oil-gas separator cylinder is shown, including a cylinder cover 2 and a cylinder body 1 with an opening at the top. The cylinder body 1 includes a cylinder body 1.1 and a bottom plate 1.2 placed at the bottom end of the cylinder body 1.1. A drain port 3 is provided at the bottom of the cylinder body 1. The bottom plate 1.2 is inclined downward on the side near the drain port 3. A baffle plate 4 is provided on the lower inner wall of the cylinder body 1. The baffle plate 4 is provided with a leakage hole 4.1. The baffle plate 4 is located above the bottom plate 1.2.

[0029] This solution relates to the field of oil-gas separator technology, and in particular to an oil-gas separator cylinder. The oil-gas separator is a key component determining the quality of compressed air from an air compressor. A high-quality oil-gas separator not only ensures high-quality, pure compressed air but also effectively guarantees the efficient operation of the air compressor. The main function of the oil-gas separator is to separate lubricating oil from the compressed air, ensuring that the purity of the discharged compressed air meets standards. By intercepting and aggregating oil mist in the gas, some oil droplets concentrate at the bottom of the filter element and return to the compressor lubrication system through the oil return pipe, while some oil concentrates at the bottom of the oil-gas separator and enters the refrigerated dryer through the oil return pipe, thereby ensuring that the compressor can discharge purer, higher-quality compressed air. In existing oil-gas separators, when oil accumulates to a certain amount at the bottom, the airflow entering the separator will entrain the accumulated oil into the compressed air, resulting in excessively high oil content in the discharged compressed air. To address the problem that existing oil-gas separators easily trap oil at the bottom when it accumulates to a certain amount, leading to excessively high oil content in the discharged compressed air, an oil-gas separator cylinder is provided to reduce the amount of oil trapped at the bottom of the oil-gas separator from being trapped in the compressed air.

[0030] An oil-gas separator in the above embodiments, such as Figure 1 , Figure 2 , Figure 3 As shown, a baffle plate 4 is installed at the bottom of the cylinder 1, and a drain hole 4.1 is provided on the baffle plate 4. The separated oil flows into the bottom of the cylinder 1 through the drain hole 4.1, so that the accumulated oil accumulates below the baffle plate 4. The airflow entering the oil-gas separator will not come into large-area contact with the accumulated oil at the bottom of the cylinder 1, which improves the problem that when the oil-gas separator accumulates to a certain amount at the bottom, it is easily drawn into the compressed air by the airflow, resulting in excessively high oil content in the discharged compressed air. The bottom of the cylinder 1 is an inclined base plate 1.2. Compared with the cover in the prior art, the inclined base plate 1.2 has lower processing cost and is easier to process, and it is also easier to drain the accumulated oil.

[0031] Example 2, as Figure 1 , Figure 2 , Figure 3 An oil-gas separator cylinder is shown, comprising a cylinder cover 2 and a cylinder body 1 with an open upper end. The cylinder body 1 includes a cylinder body 1.1 and a bottom plate 1.2 located at the bottom end of the cylinder body 1.1. A drain port 3 is provided at the bottom of the cylinder body 1, and the bottom plate 1.2 is inclined downward on the side near the drain port 3. A baffle plate 4 is provided on the lower inner wall of the cylinder body 1, and the baffle plate 4 has a leakage hole 4.1. The baffle plate 4 is located above the bottom plate 1.2. Figure 1 , Figure 2 , Figure 3 As shown, a baffle plate 4 is provided at the bottom of the cylinder 1, and a drain hole 4.1 is provided on the baffle plate 4. The separated oil flows into the bottom of the cylinder 1 through the drain hole 4.1, so that the oil accumulates below the baffle plate 4. The airflow entering the oil-gas separator will not come into large-area contact with the oil accumulation at the bottom of the cylinder 1, thus improving the problem that when the oil accumulates to a certain amount at the bottom of the oil-gas separator, it is easily drawn into the compressed air by the airflow, resulting in excessively high oil content in the discharged compressed air.

[0032] In this embodiment, as Figure 1 , Figure 2 , Figure 3 As shown, the baffle plate 4 is angled, and its outer edge is connected to the inner wall of the cylinder 1. The baffle plate 4 is angled to prevent oil from accumulating on it. The side of the baffle plate 4 with the drain hole 4.1 is inclined downwards so that the oil on the baffle plate 4 can flow into the drain hole 4.1, allowing the oil to accumulate at the bottom of the cylinder 1.

[0033] Further optimizations were made to baffle 4, such as... Figure 1 , Figure 2 , Figure 3 As shown, the outer edge of the baffle plate 4 is provided with a notch, and the leakage hole 4.1 is formed by the notch and the inner wall of the cylinder 1. The notch is easier to process, has low processing cost, and has a simple structure.

[0034] Further optimizations were made to the cylinder body 1 and the cylinder cover 2, such as... Figure 1 , Figure 2 , Figure 3 As shown, the cylinder cover 2 is rotatably mounted on the open end of the cylinder body 1.1 via a rotating component, and the cylinder cover 2 and the cylinder body 1.1 are fixed by a locking component. The cylinder cover 2 is rotated to the open end of the cylinder body 1.1 and fixed to the open end of the cylinder body 1.1 by the locking component.

[0035] When oil accumulates to a certain amount at the bottom of an existing oil-gas separator, the airflow entering the separator will entrain the accumulated oil into the compressed air, resulting in excessively high oil content in the discharged compressed air. Figure 1 , Figure 2 , Figure 3As shown, to address the problem of excessively high oil content in the discharged compressed air caused by oil accumulating at the bottom of existing oil separators and being easily drawn into the compressed air by the airflow, an oil-gas separator cylinder is provided to reduce the amount of oil accumulated at the bottom of the oil separator from being drawn into the compressed air. In the above embodiment, a baffle plate 4 is provided at the bottom of the cylinder 1, with a drain hole 4.1 on the baffle plate 4. The separated oil flows into the bottom of the cylinder 1 through the drain hole 4.1, causing the oil to accumulate below the baffle plate 4. This prevents the airflow from coming into large-area contact with the oil accumulated at the bottom of the cylinder 1, thus mitigating the problem of excessively high oil content in the discharged compressed air caused by oil accumulating at the bottom of the oil separator and being easily drawn into the compressed air by the airflow. The oil and water in the airflow are initially separated under centrifugal force and then enter the filter element for further separation from the lower end of the cyclone separator 8. This further improves the oil-gas separation efficiency. The high-quality oil-gas separator described in this technical solution can ensure high-quality and pure compressed air, effectively guarantee the efficient operation of the air compressor, ensure that the purity of the discharged compressed air meets the standards, and ensure that the compressor can discharge purer and higher-quality compressed air.

[0036] Example 3, as Figure 1 , Figure 2 , Figure 3 An oil-gas separator cylinder is shown, comprising a cylinder cover 2 and a cylinder body 1 with an open upper end. The cylinder body 1 includes a cylinder body 1.1 and a bottom plate 1.2 located at the bottom end of the cylinder body 1.1. A drain port 3 is provided at the bottom of the cylinder body 1, and the bottom plate 1.2 is inclined downward on the side near the drain port 3. A baffle plate 4 is provided on the lower inner wall of the cylinder body 1, and the baffle plate 4 has a leakage hole 4.1. The baffle plate 4 is located above the bottom plate 1.2. Figure 1 , Figure 2 , Figure 3 As shown, a baffle plate 4 is provided at the bottom of the cylinder 1, and a drain hole 4.1 is provided on the baffle plate 4. The separated oil flows into the bottom of the cylinder 1 through the drain hole 4.1, so that the oil accumulates below the baffle plate 4. The airflow entering the oil-gas separator will not come into large-area contact with the oil accumulation at the bottom of the cylinder 1, thus improving the problem that when the oil accumulates to a certain amount at the bottom of the oil-gas separator, it is easily drawn into the compressed air by the airflow, resulting in excessively high oil content in the discharged compressed air.

[0037] In this embodiment, as Figure 1 , Figure 2 , Figure 3 As shown, the cylinder 1 is equipped with a support plate 5 for supporting the filter element. The support plate 5 divides the cylinder 1 into an upper cavity and a lower cavity. The lower cavity has an inlet 6, and the upper cavity has an outlet 7. The baffle plate 4 is located below the support plate 5. The support plate 5 is used to support the filter element. The filter element is positioned above or below the support plate 5. When the filter element is positioned above the support plate 5, the filter element opening faces downward and the inner cavity of the filter element communicates with the lower cavity. When the filter element is positioned below the support plate 5, the filter element opening faces upward and the inner cavity of the filter element communicates with the upper cavity.

[0038] Further optimizations were made to support plate 5, such as... Figure 1 , Figure 2 , Figure 3 As shown, the support plate 5 is inclined, with the side of the support plate 5 near the inlet 6 tilted upwards. The inlet 6 is located at the upper part of the lower cavity. When the filter element is placed above the support plate 5, the filter element opening faces downwards and the inner cavity of the filter element is connected to the lower cavity. Oil is easily generated on the support plate 5. The side wall of the cylinder 1 is provided with an oil drain port located at the bottom of the upper cavity. The support plate 5 is inclined, so the oil accumulated on the support plate 5 is discharged out of the cylinder 1 through the oil drain port.

[0039] Further optimizations were made to support plate 5, such as... Figure 1 , Figure 2 , Figure 3 As shown, the support plate 5 and the baffle plate 4 are tilted in opposite directions, and the inlet 6 is located above the leakage hole.

[0040] Further optimizations were made to support plate 5, such as... Figure 1 , Figure 2 , Figure 3 As shown, a vertically connected cyclone separator 8 is provided below the support plate 5. The upper end of the cyclone separator 8 is connected to the lower end face of the support plate 5, and the inlet 6 is located on the outside of the cyclone separator 8. The cyclone separator 8 is positioned at the inlet 6, and the airflow enters the lower cavity from the inlet 6, rotating along the cyclone separator 8. The oil and water in the airflow are initially separated under centrifugal force, and then enter the filter element for further separation from the lower end of the cyclone separator 8. This further improves the oil-gas separation efficiency.

[0041] Further optimizations were made to the cyclone tube 8, such as... Figure 1 , Figure 2 , Figure 3 As shown, the cyclone tube 8 and the tube body 1.1 are coaxially arranged.

[0042] Further optimizations were made to baffle 4, such as... Figure 1 , Figure 2 , Figure 3 As shown, the baffle plate 4 is angled, and its outer edge is connected to the inner wall of the cylinder 1. The baffle plate 4 is angled to prevent oil from accumulating on it. The side of the baffle plate 4 with the drain hole 4.1 is inclined downwards so that the oil on the baffle plate 4 can flow into the drain hole 4.1, allowing the oil to accumulate at the bottom of the cylinder 1.

[0043] Further optimizations were made to baffle 4, such as... Figure 1 , Figure 2 , Figure 3 As shown, the outer edge of the baffle plate 4 is provided with a notch, and the leakage hole 4.1 is formed by the notch and the inner wall of the cylinder 1. The notch is easier to process, has low processing cost, and has a simple structure.

[0044] Further optimizations were made to the cylinder body 1 and the cylinder cover 2, such as... Figure 1 , Figure 2 , Figure 3 As shown, the cylinder cover 2 is rotatably mounted on the open end of the cylinder body 1.1 via a rotating component, and the cylinder cover 2 and the cylinder body 1.1 are fixed by a locking component. The cylinder cover 2 is rotated to the open end of the cylinder body 1.1 and fixed to the open end of the cylinder body 1.1 by the locking component.

[0045] When oil accumulates to a certain amount at the bottom of an existing oil-gas separator, the airflow entering the separator will entrain the accumulated oil into the compressed air, resulting in excessively high oil content in the discharged compressed air. Figure 1 , Figure 2 , Figure 3 As shown, to address the problem of excessively high oil content in the discharged compressed air caused by oil accumulating at the bottom of existing oil separators and being easily drawn into the compressed air by the airflow, an oil-gas separator cylinder is provided to reduce the amount of oil accumulated at the bottom of the oil separator from being drawn into the compressed air. In the above embodiment, a baffle plate 4 is provided at the bottom of the cylinder 1, with a drain hole 4.1 on the baffle plate 4. The separated oil flows into the bottom of the cylinder 1 through the drain hole 4.1, causing the oil to accumulate below the baffle plate 4. This prevents the airflow from coming into large-area contact with the oil accumulated at the bottom of the cylinder 1, thus mitigating the problem of excessively high oil content in the discharged compressed air caused by oil accumulating at the bottom of the oil separator and being easily drawn into the compressed air by the airflow. The oil and water in the airflow are initially separated under centrifugal force and then enter the filter element for further separation from the lower end of the cyclone separator 8. This further improves the oil-gas separation efficiency. The high-quality oil-gas separator described in this technical solution can ensure high-quality and pure compressed air, effectively guarantee the efficient operation of the air compressor, ensure that the purity of the discharged compressed air meets the standards, and ensure that the compressor can discharge purer and higher-quality compressed air.

[0046] Based on Embodiment 2, the basic structure of the baffle plate 4 is further optimized. Not shown in the attached figure, the baffle plate 4 has multiple drainage holes 4.1, which are evenly distributed on the baffle plate 4 to promote the discharge of oil accumulated on the baffle plate 4 and prevent a large amount of oil from accumulating on the baffle plate 4.

[0047] Based on Embodiment 3, the basic structure of the support plate 5 is further optimized, such as... Figure 1 , Figure 2 , Figure 3 As shown, the support plate 5 has a support hole, the open end of the filter element is connected to the support hole, and the support plate 5 supports the filter element.

[0048] Further optimizations were made to support plate 5, such as... Figure 1 , Figure 2 , Figure 3As shown, the number of support holes on the support plate 5 is multiple, and the multiple support holes are distributed in a circle on the support plate 5 so that multiple filter elements are supported on the support plate 5, so that the oil-gas separator in this solution can adopt a multi-filter element setting.

[0049] The basic structure is based on Example 3, such as... Figure 4 As shown, there are two oil-gas separators connected in parallel, which are used in larger air compressor equipment.

[0050] The specific embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the specific scope of implementation of this utility model. All equivalent changes made to the shape and structure of this utility model should be included within the protection scope of this utility model.

Claims

1. A gas-oil separation cartridge, characterized in that, The device includes a cap and a cylindrical body with an opening at the top. The cylindrical body includes a cylinder body and a bottom plate located at the bottom of the cylinder body. A drain port is provided at the bottom of the cylinder body, and the bottom plate is inclined downward on the side near the drain port. A baffle plate is provided on the lower inner wall of the cylinder body, and a leakage hole is provided on the baffle plate. The baffle plate is located above the bottom plate. The side of the baffle plate with the leakage hole is inclined downward. A support plate is provided inside the cylinder body to support the filter element. The filter element is placed above the support plate with its opening facing downward. The support plate divides the cylinder body into an upper cavity and a lower cavity. An inlet is provided in the lower cavity, and an outlet is provided in the upper cavity. The side of the support plate near the inlet is inclined upward. The inclination directions of the support plate and the baffle plate are opposite. A vortex cylinder that runs vertically through the cylinder body is provided below the support plate.

2. A gas-oil separation cartridge according to claim 1, characterized in that The baffle plate is angled, and its outer edge is connected to the inner wall of the cylinder.

3. A gas-oil separation cartridge according to claim 1 or 2, characterised in that The outer edge of the baffle plate is provided with a notch, and the leakage hole is formed by the notch and the inner wall of the cylinder.

4. A gas-oil separation cartridge according to claim 1 or 2, characterised in that The liquid baffle is located below the support plate.

5. A gas-oil separation cartridge according to claim 4, characterised in that The support plate is angled, and the inlet is located at the upper part of the lower cavity.

6. A gas-oil separation cartridge according to claim 5, characterized in that The inlet is located above the leakage hole.

7. A gas-oil separation cartridge according to claim 4, characterized in that The upper end of the cyclone tube is connected to the lower end face of the support plate, and the inlet is located on the outside of the cyclone tube.

8. A gas-oil separation cartridge according to claim 7, characterized in that The vortex tube and the tube body are coaxially arranged.

9. A gas-oil separation cartridge according to claim 1 or 2, characterised in that The cylinder cover is rotatably mounted on the open end of the cylinder body via a rotating component, and the cylinder cover and the cylinder body are fixed by a locking component.

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