A multi-stage oil-gas separator for an oil-injected screw compressor

Abstract

The present invention discloses a multi-stage oil-gas separator for an oil-injected screw compressor, specifically related to the field of oil-gas separation. The main body mechanism includes a first cylinder housing, the bottom of the first cylinder housing is threadedly connected to a second cylinder housing, the bottom of the second cylinder housing is communicated with a plurality of dispersion pipes, and one end of each of the plurality of dispersion pipes is communicated with an intake pipe. An impurity cleaning mechanism is additionally provided on the inner wall of the second cylinder housing. By making the oil-gas change its flow trajectory alternately from vertical straight flow to horizontal flow when entering the inner cavity of the first cylinder housing, the flow length and flow time of the oil-gas are changed, so that the oil-gas can be more fully separated during the circulation process, thereby improving the separation efficiency of the oil-gas. The impurity cleaning mechanism improves the separation purity and impurity collection.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas separation, and more specifically, to a multi-stage oil and gas separator for an oil-injected screw compressor. Background Art

[0002] A screw compressor, also known as a screw-type compressor, is divided into a single-screw compressor and a twin-screw compressor. Its research and development fields are very extensive, and there is great potential for performance optimization. Among them, the oil and gas separator is one of the important components of the screw compressor. Its functions are firstly to serve as the suction port for oil and gas to enter a multi-stage centrifugal pump; secondly, before the gas-liquid mixture enters the multi-stage centrifugal pump, the free gas is separated from the well fluid through the separator, thereby reducing the impact of the gas on the working characteristics of the submersible electric pump, preventing cavitation and gas locking of the centrifugal pump, and enabling the multi-stage centrifugal pump to work normally.

[0003] Chinese Patent with Application No. CN113458725A discloses a manufacturing method for an oil and gas separator for a screw air compressor, including the following steps: upper cylinder machining, gas transmission mechanism machining, lower cylinder machining, separation mechanism machining, oil and gas separator assembly, and oil and gas separation treatment. The manufacturing method of this invention has simple steps, which is not only conducive to the rapid manufacturing and processing of the oil and gas separator, but also improves the stability and reliability of the oil and gas separator assembly, greatly improves the oil and gas separation efficiency, and is conducive to ensuring the stable and reliable operation of the oil and gas separator.

[0004] Chinese Patent with Application No. CN112065534A discloses an active oil and gas separator, including: a housing, a separation device disposed at the lower part of the housing and provided with a separation impeller and a separation filter ring, a stator installed at the upper part of the housing, a rotor provided with a drive shaft for driving the separation impeller to rotate, and a cooling impeller disposed below the rotor and connected to the drive shaft; the upper end of the drive shaft is pivotally connected to the upper end of the housing through an upper bearing, and the lower end of the drive shaft is pivotally connected to the lower end of the housing through a lower bearing; the rotor is provided with a plurality of axial through holes distributed circumferentially; at least one air outlet through hole is provided at the upper end of the housing; and the separation device is provided with a plurality of separation mechanisms distributed circumferentially along the outer periphery of the separation filter ring. The upper bearing of the active oil and gas separator will not overheat and be damaged, and the oil and gas separation efficiency is relatively high.

[0005] For oil and gas separators similar to the above, in order to enhance the separation effect, most of them are fixed multi-layer filtering mechanisms inside, which perform multi-layer separation and filtration on oil and gas. However, for oil and gas separators with this kind of structure, their volumes are mostly in a relatively large state, which is not convenient to be installed in an oil-injected screw compressor. Furthermore, the separation efficiency of the oil and gas separator used in the oil-injected screw compressor is relatively poor and not convenient for actual use.

[0006] Moreover, during the actual use of the oil-gas separator, the separation efficiency and quality of the oil and gas cannot meet higher usage requirements. The purity of the separated oil and gas is relatively low, and some impurities in the oil and gas are discharged through the exhaust port, affecting the working environment, and impurities are generated during use and are inconvenient to clean up.

[0007] Therefore, the present invention proposes a multi-stage oil-gas separator for an oil-injected screw compressor to solve the above problems. Summary of the Invention

[0008] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a multi-stage oil-gas separator for an oil-injected screw compressor. When the oil and gas enter the inner cavity of the first cylinder housing, the flow trajectory thereof is alternately changed from vertical flow to horizontal flow, so that the flow length and flow time of the oil and gas are changed, so as to solve the problems raised in the above-mentioned background technology.

[0009] To achieve the above object, the present invention provides the following technical solution: A multi-stage oil-gas separator for an oil-injected screw compressor, comprising:

[0010] A main body mechanism, which includes a first cylinder housing, the bottom of the first cylinder housing is threadedly connected with a second cylinder housing, a plurality of dispersion pipes are communicated and arranged at the bottom of the second cylinder housing, one ends of the plurality of dispersion pipes are all communicated and provided with an air inlet pipe, and an impurity cleaning mechanism is additionally arranged on the inner wall of the second cylinder housing;

[0011] It further includes a first one-way filter plate, which is fixedly installed at the connection between the first cylinder housing and the second cylinder housing, and an inner cylinder partition is fixedly installed inside the first cylinder housing;

[0012] A separation mechanism, which is arranged inside the main body mechanism, the separation mechanism includes an inner cylinder slidably installed on the inner wall of the first one-way filter plate in a vertical sliding state, and a second sealing baffle fixedly installed at the top of the inner cylinder and slidably connected with the inner cylinder partition;

[0013] It further includes a plurality of second one-way filter plates, which are opened on the outer wall of the inner cylinder partition, and an exhaust port is communicated and arranged at the top of the inner cylinder partition;

[0014] It includes a power mechanism, and the power mechanism is arranged inside the separation mechanism.

[0015] Preferably, an oil-absorbing sponge block is fixedly installed at the bottom of the first one-way filter plate, a first sealing baffle is fixedly installed on the inner wall of the first one-way filter plate, and the inner cylinder is slidably installed in the first sealing baffle in a vertical sliding state.

[0016] Preferably, a plurality of the second one-way filter plates are arranged in an equidistant annular state around the inner circumferential surface of the inner cylinder partition, and the second sealing baffle is arranged on the top of the plurality of second one-way filter plates under normal conditions.

[0017] Preferably, the power mechanism includes a separation pump fixedly installed on the top of the inner cylinder partition. The end of the output shaft of the separation pump is fixedly connected with a connecting rod. The connecting rod is inside the inner cylinder, and a separation fan blade is fixedly installed on the outer wall of the connecting rod.

[0018] Preferably, the bottom of the connecting rod is fixedly connected with a connecting type threaded screw rod rotatably connected with the second cylinder housing. A third one-way filter plate is rotatably connected at the horizontal center line position of the connecting type threaded screw rod. The inner cylinder is installed on the outer wall of the third one-way filter plate in a vertically sliding state, and the inner cylinder is engaged with the outer wall of the connecting type threaded screw rod.

[0019] Preferably, a connecting type cover cylinder is fixedly installed at the bottom of the second cylinder housing. An anti-backflow drain pipe is communicated with the bottom of the connecting type cover cylinder. A plurality of first limiting type top rods are fixedly installed at the bottom of the second cylinder housing. The inner circumferential diameter length of the connecting type cover cylinder is greater than the outer circumferential length between the inner cylinders.

[0020] Preferably, a connecting type through pipe is communicated with the bottom of the inner cylinder. A second limiting type top rod arranged vertically is inserted into the inner cavity of the connecting type through pipe. A sealing cover plate is fixedly installed at the top of the second limiting type top rod, and a telescopic spring is fixedly installed between the sealing cover plate and the connecting type through pipe. The first limiting type top rod is inserted into the bottom of the connecting type through pipe.

[0021] Preferably, a fourth one-way filter plate is installed on the inner wall of the first cylinder housing. The fourth one-way filter plate is conical, and the connecting rod penetrates through the fourth one-way filter plate.

[0022] Preferably, the impurity cleaning mechanism includes a support block fixed on the inner wall of the second cylinder housing. A collecting tray is rotatably installed on the support block. A wind shielding plate is fixedly installed at the bottom of the collecting tray. A cleaning brush is fixed on the collecting tray. The top of the cleaning brush is in close contact with an oil-absorbing sponge block. The wind shielding plate drives the collecting tray to make a sliding rotation movement on the support block under the action of a dispersion pipe. While the collecting tray rotates, the cleaning brush also rotates relatively. While the cleaning brush rotates with the bottom of the collecting tray, the cleaning brush is in close contact with the oil-absorbing sponge block in contact with the upper part, so that the impurities adsorbed on the oil-absorbing sponge block fall off, and the impurities are collected through the collecting tray.

[0023] Preferably, the wind shielding plates are uniformly distributed and fixedly installed at the bottom of the collecting tray along the center of the collecting tray, and are relatively inclined with the collecting tray.

[0024] Preferably, the inner cylinder is made of stainless steel material. Using stainless steel material can avoid defects such as rust. Besides using stainless steel material, it can also be replaced with other materials that achieve this function.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. By arranging an inner cylinder partition between the first cylinder housing and the inner cylinder, and opening a plurality of second one-way filter plates on the outer wall of the inner cylinder partition, when the oil and gas enter the inner cavity of the first cylinder housing, the flow trajectory thereof changes alternately from vertical straight flow to horizontal flow, so that the flow length of the oil and gas changes, and then the flow time of the oil and gas inside the first cylinder housing increases, so that the oil and gas can move and separate more fully during the circulation process, thereby improving the separation efficiency of the oil and gas.

[0027] 2. By arranging an inner cylinder that can move up and down inside the inner cylinder partition, when the inner cylinder moves up and down, the oil and gas enter the inner cavity of the inner cylinder intermittently and quantitatively and are further separated through a power mechanism, so that the amount of oil and gas to be separated during the separation process is uniform, avoiding the problem of insufficient separation caused by too much oil and gas introduced at one time. This device is more rapid and convenient to separate and is more convenient for actual use.

[0028] 3. The impurity cleaning mechanism arranged in the inner cylinder can, on the one hand, initially separate the just-entered oil and gas. When the oil and gas move upward, it is further filtered through an oil-absorbing sponge block. While the oil and gas are further filtered through the oil-absorbing sponge block, under the rotation of the impurity cleaning mechanism, the cleaning brush fixed on the impurity cleaning mechanism further cleans the impurities on the oil-absorbing sponge block, making the oil and gas passing through the oil-absorbing sponge block smoother, improving the purity of the oil and gas separation. The impurities on the oil-absorbing sponge block are collected through a collection tray, and it is convenient to replace and clean later. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 It is a schematic diagram of the bottom structure of the present invention.

[0031] Figure 3 It is a front sectional view of the structure of the present invention.

[0032] Figure 4 It is for the present invention Figure 3 An enlarged view of the structure of part A.

[0033] Figure 5 It is for the present invention Figure 3Enlarged view of the structure of part B.

[0034] Figure 6 This is a partial structure cross-sectional view of the main body mechanism and the separation mechanism of the present invention.

[0035] Figure 7 For the present invention Figure 6 Enlarged view of the structure of part C.

[0036] Figure 8 For the present invention Figure 6 Enlarged view of the structure of part D.

[0037] Figure 9 This is a cross-sectional view of the top structure of the present invention.

[0038] Figure 10 This is a cross-sectional view of the impurity cleaning structure of the present invention.

[0039] The reference numerals in the drawings are: 1 main body mechanism, 101 first cylinder housing, 102 second cylinder housing, 103 first one-way filter plate, 104 inner cylinder partition, 105 second one-way filter plate, 106 intake pipe, 107 dispersion pipe, 108 exhaust port, 109 oil-absorbing sponge block, 110 first sealing baffle, 2 separation mechanism, 21 inner cylinder, 22 second sealing baffle, 23 third one-way filter plate, 24 connecting hood cylinder, 25 anti-backflow oil discharge pipe, 26 first limiting top rod, 27 connecting through pipe, 28 second limiting top rod, 29 sealing cover plate, 210 telescopic spring, 211 fourth one-way filter plate, 3 power mechanism, 31 separation pump, 32 connecting rod, 33 separation fan blade, 34 connecting threaded lead screw, 4 impurity cleaning mechanism, 41 collection tray, 42 wind baffle, 43 support block, 44 cleaning brush. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] Embodiment 1

[0042] Referring to the attached drawings of the specification Figures 1 - 10 , a multi-stage oil-gas separator for an oil-injected screw compressor according to an embodiment of the present invention is as shown in Figures 1 - 3As shown in the figure, it includes a main body mechanism 1, which includes a first cylindrical outer shell 101. The bottom of the first cylindrical outer shell 101 is threadedly connected to a second cylindrical outer shell 102. A plurality of dispersion pipes 107 are communicated and arranged at the bottom of the second cylindrical outer shell 102. One end of each of the plurality of dispersion pipes 107 is communicated with an air inlet pipe 106. During actual use, the oil and gas enter the inner cavity of the second cylindrical outer shell 102 dispersedly from the plurality of dispersion pipes 107 through the air inlet pipe 106.

[0043] It also includes a first one-way filter plate 103, which is fixedly installed at the connection between the first cylindrical outer shell 101 and the second cylindrical outer shell 102. An inner cylindrical partition plate 104 is fixedly installed inside the first cylindrical outer shell 101. When the oil and gas entering the inside of the second cylindrical outer shell 102 circulates, it preferentially enters the inner cavity of the first cylindrical outer shell 101 through the first one-way filter plate 103 and is limited and blocked by the inner cylindrical partition plate 104, so that the circulation channel of the oil and gas is divided into two parts and circulates in the inner cavity of the first cylindrical outer shell 101, increasing the overall circulation distance of the oil and gas.

[0044] At the same time, it also includes a separation mechanism 2, which is arranged inside the main body mechanism 1. Combining Figures 4 - 5 As shown in the figure, the separation mechanism 2 includes an inner cylinder 21 slidably installed on the inner wall of the first one-way filter plate 103 in a vertical sliding state. A second sealing baffle 22 fixedly installed at the top of the inner cylinder 21 is slidably connected to the inner cylindrical partition plate 104.

[0045] It also includes a plurality of second one-way filter plates 105, which are opened on the outer wall of the inner cylindrical partition plate 104. An exhaust port 108 is communicated at the top of the inner cylindrical partition plate 104. Combining Figure 3 As shown in the figure, a power mechanism 3 is arranged inside the separation mechanism 2. The purpose of such a setting is that when the oil and gas circulates inside the first cylindrical outer shell 101 and the second cylindrical outer shell 102, by combining the settings of the first one-way filter plate 103 and the inner cylindrical partition plate 104, the circulation distance of the oil and gas is changed, so that the oil and gas can fully impact the main body mechanism 1, thereby improving the oil and gas impact separation effect; on the other hand, when the inner cylinder 21 moves up and down inside the first one-way filter plate 103, a plurality of second one-way filter plates 105 can be intermittently exposed, so as to guide the oil and gas to flow horizontally again until it enters the inner cavity of the inner cylinder 21, and the power mechanism 3 is combined to perform targeted separation treatment on the oil and gas, so as to realize the synchronous progress of multiple separations, improve the overall separation efficiency, and be more convenient for actual use.

[0046] Among them, referring to Figure 4As shown, an oil-absorbing sponge block 109 is fixedly installed at the bottom of the first one-way filter plate 103. The purpose of this setting is that after the oil and gas enter the inner cavity of the second cylinder housing 102 through the air inlet pipe 106, by combining the setting of the oil-absorbing sponge block 109, when the oil and gas penetrate through the first one-way filter plate 103 along the longitudinal direction of the first cylinder housing 101, the oil particles in the oil and gas are adsorbed and removed by the oil-absorbing sponge block 109. At the same time, a first sealing baffle 110 is fixedly installed on the inner wall of the first one-way filter plate 103, and the inner cylinder 21 is installed inside the first sealing baffle 110 in a vertically sliding state. The purpose of this setting is to make the connection between the first one-way filter plate 103 and the inner cylinder 21 in a sealed state. After the gas enters the inner cavity of the first cylinder housing 101, it can only flow vertically preferentially. Further, in combination with Figure 5 As shown, a plurality of second one-way filter plates 105 are arranged in an annular and equally spaced state around the inner circumferential surface of the inner cylinder partition 104, and the second sealing baffle 22 is arranged on the top of the plurality of second one-way filter plates 105 under normal conditions. The purpose of this setting is that under normal conditions, after the oil and gas enter the inner cavity of the first cylinder housing 101 through the first one-way filter plate 103, due to the limiting block of the second sealing baffle 22, the oil and gas cannot enter the inner cylinder 21. Only when the inner cylinder 21 drives the second sealing baffle 22 to move downward as a whole, making the plurality of second one-way filter plates 105 exposed, can the oil and gas be guided to flow into the inner cylinder 21. Therefore, in actual use, after the oil and gas flow vertically into the first cylinder housing 101, it can then flow horizontally through the second one-way filter plates 105, so that the flow range of the oil and gas is increased. And during the process of the inner cylinder 21 driving the second sealing baffle 22 to move downward, the oil and gas flowing into the space between the inner cylinder partition 104 and the inner cylinder 21 can gradually be subjected to a downward pressure, prompting the oil and gas to flow through the gap between the inner cylinder partition 104 and the first one-way filter plate 103 to the space between the inner cylinder partition 104 and the first cylinder housing 101. Thus, when the oil and gas are inside the first cylinder housing 101, its flow range circulates, and the flow rate also changes synchronously with the movement of the inner cylinder 21, thereby increasing the gas flow rate and enabling all the oil and gas entering the first cylinder housing 101 to participate in the movement separation, further improving the separation efficiency.

[0047] Embodiment 2

[0048] On the basis of Embodiment 1, since relying solely on the transmission of the oil and gas port itself cannot achieve an ideal oil and gas separation effect, in the process of use, the phenomenon of insufficient oil and gas separation is likely to occur, resulting in uneven separated oil and gas.

[0049] On the basis of Embodiment 1, referring to Figure 3As shown in the figure, the power mechanism 3 includes a separation pump 31 fixedly installed at the top of the inner cylinder partition plate 104. The end of the output shaft of the separation pump 31 is fixedly connected with a connecting rod 32 extending into the inner cylinder 21. The outer wall of the connecting rod 32 is fixedly installed with a separation fan blade 33. The purpose of this setting is that when the oil and gas enter the inner cavity of the inner cylinder 21, by starting the separation pump 31, the connecting rod 32 drives the separation fan blade 33 to rotate as a whole, so that the oil and gas collide with it and the oil and gas are separated again, which can enhance the overall separation efficiency. Further, referring to Figures 6 - 8 As shown in the figure, the bottom of the connecting rod 32 is fixedly connected with a connecting type threaded screw rod 34 rotatably connected with the second cylinder housing 102. The third one-way filter plate 23 is rotatably connected at the horizontal center line position of the connecting type threaded screw rod 34. The inner cylinder 21 is installed on the outer wall of the third one-way filter plate 23 in a vertically sliding state, and the inner cylinder 21 is engaged with the outer wall of the connecting type threaded screw rod 34. In the normal state, the distance gap between the third one-way filter plate 23 and the bottom of the inner cylinder 21 is small. When driving the inner cylinder 21 and the second sealing baffle 22 to move up and down, the oil substance at the oil and gas separation part can be filtered through the third one-way filter plate 23 and fall to the bottom of the inner cylinder 21. And when the inner cylinder 21 moves down as a whole, through the limit of the third one-way filter plate 23, the air pressure at the bottom of the inner cylinder 21 can be changed, generating a downward suction force to accelerate the falling of the oil substance. Then, in actual use, when the inner cylinder 21 and the second sealing baffle 22 are moved down as a whole to expose the second one-way filter plate 105, the oil and gas enter the inner part of the inner cylinder 21. At this time, when the inner cylinder 21 and the second sealing baffle 22 are moved up as a whole to block the second one-way filter plate 105, the separation fan blade 33 can be started to rotate to separate the oil and gas in the inner cavity of the inner cylinder 21. By repeating this process, the amount of oil and gas during the separation process is uniform, and the separation is faster and more convenient, which is more conducive to improving the overall separation efficiency.

[0050] At the same time, referring to Figure 8 As shown in the figure, a connecting type cover cylinder 24 is fixedly installed at the bottom of the second cylinder housing 102. The bottom of the connecting type cover cylinder 24 is communicated with an anti-backflow oil discharge pipe 25. A plurality of first limit type top rods 26 are fixedly installed at the bottom of the second cylinder housing 102. The inner circumferential diameter length of the connecting type cover cylinder 24 is greater than the outer circumferential length between the inner cylinders 21. The purpose of this setting is that when the inner cylinder 21 moves down as a whole and approaches the connecting type cover cylinder 24, the connecting type cover cylinder 24 can limit and lift the bottom of the inner cylinder 21. Combining Figure 7As shown in the figure, a connecting type through pipe 27 is connected and provided at the bottom of the inner cylinder 21. A second limiting type ejector rod 28 arranged vertically is inserted into the inner cavity of the connecting type through pipe 27. A sealing cover plate 29 is fixedly installed at the top of the second limiting type ejector rod 28. A telescopic spring 210 is fixedly installed between the sealing cover plate 29 and the connecting type through pipe 27. The first limiting type ejector rod 26 is inserted into the bottom of the connecting type through pipe 27. In the normal state, the telescopic spring 210 is in a contracted state, pulling the connecting type through pipe 27 and the sealing cover plate 29 downward integrally to cover and block the top of the connecting type through pipe 27, so that the oil substances falling into the bottom of the inner cylinder 21 cannot leak out. When the inner cylinder 21 moves downward as a whole and contacts the connecting type cover cylinder 24, the insertion limit of the first limiting type ejector rod 26 and the connecting type through pipe 27 can be synchronized. During the downward movement of the inner cylinder 21, the connecting type through pipe 27 is gradually subjected to an upward thrust as a whole, and then the sealing cover plate 29 is moved out of the top of the connecting type through pipe 27 to expose a gap, so that the oil substances leak into the inner cavity of the connecting type cover cylinder 24 through the gap and are discharged through the anti-backflow oil discharge pipe 25.

[0051] In specific implementation, first, the oil and gas are introduced into the inner cavity of the second cylinder housing 102 through the air inlet pipe 106 and the dispersion pipe 107. After the oil and gas enter the inner cavity of the second cylinder housing 102, they enter between the first cylinder housing 101 and the inner cylinder 21 through the oil-absorbing sponge block 109 and the first one-way filter plate 103. Among them, limited and blocked by the inner cylinder partition plate 104, the oil and gas are separated into two channels for further dispersion and circulation to increase the overall circulation distance of the oil and gas inside the first cylinder housing 101. After that, by starting the separation pump 31, the connecting rod 32 drives the separation fan blade 33 to rotate, and at the same time, the connecting type threaded lead screw 34 rotates, so that the inner cylinder 21 and the second sealing baffle 22 move downward as a whole until the second sealing baffle 22 moves to the bottom of the second one-way filter plate 105. The oil and gas between the first cylinder housing 101 and the inner cylinder 21 enter the inside of the inner cylinder 21 again through the second one-way filter plate 105. At the same time, the continuously rotating connecting type threaded lead screw 34 drives the inner cylinder 21 to move upward to perform targeted separation treatment on the oil and gas enclosed inside the inner cylinder 21. The separated oil drops to the bottom of the inner cylinder 21 through the third one-way filter plate 23, and the separated gas is discharged uniformly through the exhaust port 108. And before the gas passes through the exhaust port 108, it is further filtered by the fourth one-way filter plate 211 to make the oil and gas separation more uniform.

[0052] Embodiment III

[0053] Based on the first and second embodiments, it is found that after the oil and gas are filtered through the oil-contaminated adsorption sponge block 109, a large amount of impurities will be formed at the bottom of the oil-contaminated adsorption sponge block 109. These impurities not only affect the permeability of the oil-contaminated adsorption sponge block 109, but also are difficult to clean after a long time at the bottom. This causes insufficient oil and gas during oil and gas separation, and the falling impurities are likely to further contaminate the separated oil, affecting the purity of oil and gas separation.

[0054] Referring to Figure 10 As shown, the impurity cleaning mechanism 4 includes a support block 43. The support block 43 is fixed on the inner wall of the second cylinder housing 102. A collection tray 41 is rotatably installed on the support block 43. A wind baffle 42 is fixedly installed at the bottom of the collection tray 41. A cleaning brush 44 is fixed on the collection tray 41. The top of the cleaning brush 44 is in close contact with the oil-contaminated adsorption sponge block 109. Under the action of the dispersion pipe 107, the wind baffle drives the collection tray 41 to perform a sliding rotation movement on the support block 43. While the collection tray 41 rotates, the cleaning brush also rotates relatively. The specific implementation is as follows: The oil and gas are transported through the dispersion pipe 107 to the inside of the second cylinder housing 102 through the intake pipe 106. The plurality of dispersion pipes 107 spray the oil and gas onto the wind baffles 42 evenly distributed at the bottom of the collection tray 41 which is inclinedly installed. Thus, the oil and gas are separated for the first time under the action of the wind baffle 42. While separating the oil and gas, the wind baffle 42 drives the collection tray 41 to perform a sliding rotation movement on the support block 43. While performing the sliding rotation movement, the cleaning brush 44 installed on the collection tray 41 rotates relatively, and the cleaning brush 44 is in close contact with the oil-contaminated adsorption sponge block 109. Under the action of the cleaning brush 44, the impurities adsorbed on the bottom of the oil-contaminated adsorption sponge block 109 are cleaned. The cleaned impurities fall into the collection tray 41, and the collection tray 41 collects the cleaned impurities. After cleaning, the oil-contaminated adsorption sponge block 109 can make the oil and gas pass through more smoothly, improving the oil and gas separation efficiency. By cleaning and collecting the impurities at the bottom of the oil-contaminated adsorption sponge block 109, the purity of oil and gas separation is further improved.

[0055] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-stage oil-gas separator for an oil-injected screw compressor, characterized in that, it includes: A main body mechanism, which includes a first cylinder housing. The bottom of the first cylinder housing is threadedly connected to a second cylinder housing. A plurality of dispersion pipes are communicated and arranged at the bottom of the second cylinder housing. One ends of the plurality of dispersion pipes are all communicated with an air inlet pipe. An impurity cleaning mechanism is additionally arranged on the inner wall of the second cylinder housing; It also includes a first one-way filter plate, which is fixedly installed at the connection between the first cylinder housing and the second cylinder housing. An inner cylinder partition is fixedly installed inside the first cylinder housing; A separation mechanism, which is arranged inside the main body mechanism. The separation mechanism includes an inner cylinder installed in a vertically sliding state on the inner wall of the first one-way filter plate. A second sealing baffle slidably connected to the inner cylinder partition is fixedly installed at the top of the inner cylinder; It also includes a plurality of second one-way filter plates, which are opened on the outer wall of the inner cylinder partition. An exhaust port is communicated at the top of the inner cylinder partition; A power mechanism, which is arranged inside the separation mechanism; After the oil-gas enters the inner cavity of the first cylinder housing through the first one-way filter plate, it is limited and blocked by the second sealing baffle, and the oil-gas cannot enter the inside of the inner cylinder. When the inner cylinder drives the second sealing baffle to move downward as a whole, so that the second sealing baffle moves to the bottom of the second one-way filter plate, the oil-gas can be guided and circulated into the inside of the inner cylinder.

2. A multi-stage oil-gas separator for an oil-injected screw compressor according to claim 1, characterized in that, An oil-absorbing sponge block is fixedly installed at the bottom of the first one-way filter plate. A first sealing baffle is fixedly installed on the inner wall of the first one-way filter plate. The inner cylinder is installed in a vertically sliding state inside the first sealing baffle.

3. A multi-stage oil-gas separator for an oil-injected screw compressor according to claim 1, characterized in that, A plurality of second one-way filter plates are all arranged in an annular and equally spaced state around the inner circumferential surface of the inner cylinder partition, and the second sealing baffle is arranged at the top of the plurality of second one-way filter plates under normal conditions.

4. A multi-stage oil-gas separator for an oil-injected screw compressor according to claim 3, characterized in that, The power mechanism includes a separation pump fixedly installed at the top of the inner cylinder partition. The end of the output shaft of the separation pump is fixedly connected with a connecting rod. The connecting rod is inside the inner cylinder. A separation fan blade is fixedly installed on the outer wall of the connecting rod.

5. A multi-stage oil-gas separator for an oil-injected screw compressor according to claim 4, characterized in that, The bottom of the connecting rod is fixedly connected with a connecting type threaded screw rod rotatably connected to the second cylinder housing. A third one-way filter plate is rotatably connected at the horizontal center line position of the connecting type threaded screw rod. The inner cylinder is installed in a vertically sliding state on the outer wall of the third one-way filter plate, and the inner cylinder is engaged on the outer wall of the connecting type threaded screw rod.

6. A multi-stage oil-gas separator for an oil-injected screw compressor according to claim 5, characterized in that, A connecting hood cylinder is fixedly installed at the bottom of the second cylinder housing. An anti-backflow oil discharge pipe is communicated and arranged at the bottom of the connecting hood cylinder. A plurality of first limiting ejector rods are fixedly installed at the bottom of the second cylinder housing. The inner circumferential diameter length of the connecting hood cylinder is greater than the outer circumferential length between the inner cylinders.

7. A multi-stage oil-gas separator for an oil-injected screw compressor according to claim 6, wherein, A connecting through pipe is communicated and arranged at the bottom of the inner cylinder. A second limiting ejector rod arranged vertically is inserted into the inner cavity of the connecting through pipe. A sealing cover plate is fixedly installed at the top of the second limiting ejector rod. A telescopic spring is fixedly installed between the sealing cover plate and the connecting through pipe. The first limiting ejector rod is inserted into the bottom of the connecting through pipe.

8. A multi-stage oil-gas separator for an oil-injected screw compressor according to claim 4, wherein, A fourth one-way filter plate is installed on the inner wall of the first cylinder housing. The fourth one-way filter plate is conical, and the connecting rod penetrates through the fourth one-way filter plate.

9. A multi-stage oil-gas separator for an oil-injected screw compressor according to claim 8, wherein, The impurity cleaning mechanism includes a support block. The support block is fixed on the inner wall of the second cylinder housing. A collecting tray is rotatably installed on the support block. A wind baffle is fixedly installed at the bottom of the collecting tray. A cleaning brush is fixed on the collecting tray. The top of the cleaning brush is in close contact with an oil-absorbing sponge block.

10. A multi-stage oil-gas separator for an oil-injected screw compressor according to claim 9, wherein, The wind baffles are uniformly distributed and fixedly installed at the bottom of the collecting tray along the center of the collecting tray and are inclined relative to the collecting tray.

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