Screw machine inlet filter for argon recovery

Abstract

The invention relates to the technical field of filters, in particular to a screw machine inlet filter for argon recovery, which comprises a shell, the shell is provided with a gas inlet cavity, a recovery cavity and an adding cavity, the gas inlet cavity is arranged in the middle of the recovery cavity and the adding cavity, one end of the gas inlet cavity is provided with a gas inlet, and the other end of the gas inlet cavity is provided with a gas outlet; the other end of the air inlet cavity is fixedly communicated with an air inlet of the screw machine; the inserting groove is formed in the inner wall of the shell, and the air inlet cavity communicates with the recycling cavity and the adding cavity through the inserting groove; elastic sealing gaskets are fixed to the side walls of the two filtering parts, the filtering parts are arranged to be of a multi-layer structure, when part of the filtering parts are blocked, the filtering parts can be recognized in time and automatically replaced with new filtering parts, on one hand, the whole body does not need to be replaced, and therefore the replacement cost is saved; and on the other hand, automatic replacement is achieved in time, and the adverse effect on the suction efficiency of the screw machine caused by blockage is reduced.

Description

Technical Field

[0001] The invention relates to the field of filters, and in particular to an inlet filter of a screw machine for argon recovery. Background Art

[0002] Screw compressors are widely used in the industrial field. Their working principle is that a pair of meshing screw rotors rotate in the casing to compress and discharge the gas. Screw compressors have many advantages, including high reliability, easy operation and maintenance, good power balance, strong adaptability and the ability to transport multiple phases.

[0003] Most of the inlet filters in the prior art are provided with an integral filter element. After the filter element filters out impurities, the impurities block the entry of subsequent airflow, which has an adverse effect. Therefore, the existing inlet filters still have room for improvement. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a screw machine inlet filter for argon recovery.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is: a screw machine inlet filter for argon recovery, comprising:

[0006] A shell, wherein the shell has an air inlet chamber, a recovery chamber, and an addition chamber, wherein the air inlet chamber is arranged in the middle of the recovery chamber and the addition chamber, an air inlet is arranged at one end of the air inlet chamber, and the other end of the air inlet chamber is fixedly connected to the air inlet of the screw machine;

[0007] A slot is provided on the inner wall of the shell, and connects the air inlet chamber with the recovery chamber and the adding chamber respectively;

[0008] Two filter elements, elastic sealing pads are fixed on the side walls of the two filter elements, one of the filter elements is arranged inside the adding cavity, and the other filter element is arranged inside the air inlet cavity;

[0009] A detection component, the detection component is arranged inside the slot, and the detection component is used to detect the extrusion force of the filter element under the action of suction to determine whether the filter element is blocked;

[0010] A pushing component, when the detection component detects that the filter element is clogged, the pushing component is used to push the filter element in the adding chamber into the air intake chamber, and squeeze the filter element in the air intake chamber into the recovery chamber;

[0011] Among them, the inlet filter in the prior art is mostly provided with an integral filter element. After the filter element filters out the impurities, the impurities block the entry of the subsequent airflow, which has an adverse effect;

[0012] It should be noted that, under the suction force of the screw machine, the filter element has a tendency to move toward the suction port of the screw machine, thereby squeezing the detection component through the elastic sealing pad; when the filter element is clogged with impurities, the squeezing force of the elastic sealing pad squeezing the detection component increases, and when the pressure reaches a preset value or a preset range, it is determined that the filter element is clogged;

[0013] At this time, by starting the push rod assembly, the filter element in the adding chamber can be pushed to move into the air inlet chamber, and the filter element in the air inlet chamber is pushed by the filter element in the adding chamber, so that after the filter element in the adding chamber enters the air inlet chamber, the filter element in the air inlet chamber is synchronously moved to the inside of the recovery chamber, completing the automatic switching of the filter element;

[0014] Since the clogging conditions of various positions of the filter are different, the end of the filter is the first to contact the impurities in the gas, so it is usually the first to be clogged. After clogging, the entire filter needs to be replaced;

[0015] The present invention arranges the filter elements into a multi-layer structure. When some of the filter elements are clogged, they can be identified in time and automatically replaced with new ones. On the one hand, there is no need to replace the entire filter element, which is beneficial to saving replacement costs. On the other hand, timely and automatic replacement is also beneficial to reducing the adverse effects of blockage on the suction efficiency of the screw machine.

[0016] Preferably, the adding chamber is provided with a first insertion slot at a position above each filter element, the recovery chamber is provided with a third insertion slot at a position above each filter element, a plurality of second insertion slots are symmetrically provided in groups of two at the top of the air inlet chamber, two of the second insertion slots are respectively connected to the first insertion slot and the third insertion slot, a protrusion is fixed on the inner wall of the second insertion slot, and a limiting slot is provided on a side of the filter element close to the protrusion:

[0017] Among them, by setting a limiting groove on the filter element, when inserting, the limiting groove needs to be facing the protrusion, and the filter element cannot be inserted if the limiting groove is facing the opposite direction, thereby ensuring the direction accuracy of the filter element during the insertion process;

[0018] Furthermore, by providing the limiting groove, it is also helpful to reduce the contact area between the second filter plate and the first filter plate, thereby reducing the friction effect of the adjacent filter element on the filter element during the movement of the filter element in the air inlet cavity;

[0019] A detachable protective cover may be provided on the top of the shell, and the opening on the top may be shielded to reduce the entry of dust.

[0020] Preferably, the cross-sectional dimension of the limiting groove is larger than the cross-sectional dimension of the protrusion.

[0021] Furthermore, since the cross-sectional dimension of the limiting groove is larger than the cross-sectional dimension of the protrusion, precise alignment is not required during the insertion process, thereby helping to improve the installation efficiency of maintenance personnel.

[0022] Preferably, the detection assembly comprises two pressure sensors, both of which are installed inside the slot and symmetrically arranged on both sides of the filter element;

[0023] Normally, the airflow can pass through the filter smoothly, but when blockage occurs, the blockage will reduce the effective filter area of ​​the filter, thereby increasing the resistance of the airflow through the filter, resulting in increased pressure on the filter. At this time, the filter needs to be replaced in time, but during the replacement process, because the new filter pushes the old filter to move, the airflow is more likely to pass through the new filter surface, resulting in changes in the airflow distribution. When the airflow passes through the rear filter, the airflow distribution on the rear filter surface is uneven, resulting in different pressure differences on both sides of the rear filter, which can easily lead to misjudgment of subsequent sensors.

[0024] If only one pressure sensor is provided, it is difficult to detect the pressure on both sides of the filter element at the same time. Therefore, the present invention provides a pressure sensor on both sides of the filter element respectively. When it is detected that the pressure value rising rate on one side is greater than the preset rising rate, it is determined that the pressure value rises abnormally, and no replacement operation is performed.

[0025] Preferably, it further comprises a processing terminal for controlling the pushing component to push, and the processing method of the processing terminal comprises the following steps:

[0026] Get the pressure value parameter of the filter element;

[0027] Compare the pressure value parameter with the preset pressure range, and generate pushing information when the pressure value parameter reaches the preset pressure range;

[0028] Controlling the pushing component to push the filter element toward the inside of the air intake cavity according to the pushing information;

[0029] The pressure value of the filter element is detected by a detection component. When the pressure value reaches a preset pressure range, blockage is determined, thereby generating push information to control the replacement of the filter element.

[0030] Preferably, the processing method further comprises the following steps:

[0031] In the preceding filter element replacement process, pressure value parameters on both sides of other filter elements are obtained and determined as the first parameter and the second parameter;

[0032] When one of the first parameter or the second parameter reaches a preset pressure range, the difference between the first parameter and the second parameter is calculated, and when the difference exceeds the preset difference, abnormal pressure value information is determined, and when the difference does not exceed the preset difference, normal pressure value information is determined;

[0033] Determining the result of pushing information of the corresponding filter element as invalid according to the abnormal pressure value information;

[0034] The result of determining the pushing information of the corresponding filter element according to the normal information of the pressure value is valid;

[0035] During the replacement process, the airflow is more likely to pass through the surface of the new filter when the new filter pushes the old filter to move, causing the airflow distribution to change. When the airflow passes through the rear filter, the airflow distribution on the surface of the rear filter is uneven, resulting in different pressure differences on both sides of the rear filter, which can easily lead to misjudgment by subsequent sensors.

[0036] Therefore, during the replacement process of the preceding filter element, by detecting the pressure values ​​on both sides of the succeeding filter element, when the pressure value difference exceeds the preset value, it indicates that it is greatly affected by the airflow during the replacement process, and therefore, its pressure value result is invalid and cannot be directly judged to be replaced;

[0037] The first filter element is the one being replaced, and the second filter element is the filter element behind it.

[0038] Preferably, the pushing information at least includes the position information of the filter element to be pushed, and the processing method further includes the following steps:

[0039] Determine the target filter element according to the position information of the filter element to be pushed;

[0040] Obtaining the preceding pressure values ​​of all filters whose push information results are valid behind the target filter element, wherein the preceding pressure value is the pressure value when the target filter element is not moved;

[0041] Adjust the preset pressure range of the corresponding filter element according to the previous pressure value;

[0042] Among them, some subsequent filters are far away from the replaced filters and are less affected by the airflow, but during the replacement process, their pressure values ​​reach the level of replacement, indicating that the previous filters are blocked and have a greater impact on them, causing the detection component to fail. At this time, it is necessary to update its preset pressure range.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] 1. The present invention arranges the filter element into a multi-layer structure. When part of the filter element is blocked, it can be identified in time and automatically replaced with a new filter element. On the one hand, there is no need to replace the entire filter element, which is beneficial to saving replacement costs. On the other hand, timely and automatic replacement is also beneficial to reducing the adverse effects of blockage on the suction efficiency of the screw machine.

[0045] Second, by setting a limiting groove on the filter element, when inserting, the limiting groove needs to be facing the protrusion, and it can be inserted. If the limiting groove is in the opposite direction, it cannot be inserted, thereby ensuring the direction accuracy of the filter element during the insertion process;

[0046] Third, by providing the limiting groove, it is also helpful to reduce the contact area between the second filter plate and the first filter plate, thereby reducing the friction effect caused by the adjacent filter element on the filter element during the movement of the filter element in the air inlet cavity.

[0047] 4. During the replacement process, as the new filter pushes the old filter to move, the airflow can more easily pass through the surface of the new filter, causing the airflow distribution to change. During the process of the airflow passing through the rear filter, the airflow distribution on the surface of the rear filter is uneven, resulting in different pressure differences on both sides of the rear filter, which in turn may easily lead to misjudgment by subsequent sensors. Therefore, during the replacement of the previous filter, by detecting the pressure values ​​on both sides of the subsequent filter, when the pressure value difference exceeds the preset value, it means that it is greatly affected by the airflow during the replacement process. Therefore, the pressure value result is invalid and cannot be directly judged for replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0049] Figure 2 It is a schematic diagram of the shell structure of the present invention.

[0050] Figure 3 For the present invention Figure 2 A in the figure is an enlarged structural diagram.

[0051] Figure 4 The cross-sectional structure of the shell of the present invention is shown in FIG. Figure 1 .

[0052] Figure 5 For the present invention Figure 4 The enlarged structural diagram at B in FIG.

[0053] Figure 6 The cross-sectional structure of the shell of the present invention is shown in FIG. Figure 2 .

[0054] Figure 7 For the present invention Figure 6 The enlarged structural diagram at C in the figure.

[0055] Figure 8 For the present invention Figure 6 The enlarged structural diagram at D in the figure.

[0056] Fig. 9 It is a schematic diagram of the filter structure of the present invention.

[0057] In the figure: 1. Shell; 101. Air inlet chamber; 102. Recovery chamber; 103. Adding chamber; 2. Slot; 3. Filter element; 301. Filter element; 4. Elastic sealing pad; 5. Screw machine; 6. First insertion slot; 7. Second insertion slot; 8. Bump; 9. Limiting slot; 10. Groove; 11. First inclined plane; 12. Electric push rod; 13. Second inclined plane; 14. Pressure sensor; 15. Installation slot; 16. Telescopic rod; 17. Make way hole; 18. Protective cover; 19. Third insertion slot. DETAILED DESCRIPTION

[0058] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0059] like Figures 1 to 9 A screw machine inlet filter for argon recovery shown, comprising:

[0060] The housing 1 has an air inlet chamber 101, a recovery chamber 102, and an addition chamber 103. The air inlet chamber 101 is arranged in the middle of the recovery chamber 102 and the addition chamber 103. An air inlet is arranged at one end of the air inlet chamber 101, and the other end of the air inlet chamber 101 is fixedly connected to the air inlet of the screw machine 5.

[0061] Slot 2, which is provided on the inner wall of the housing 1, and connects the air inlet chamber 101 with the recovery chamber 102 and the adding chamber 103 respectively;

[0062] Two filter elements 3, elastic sealing pads 4 are fixed on the side walls of the two filter elements 3, one of the filter elements 3 is arranged inside the adding cavity 103, and the other filter element 3 is arranged inside the air inlet cavity 101;

[0063] A detection component is arranged inside the slot 2, and is used to detect the extrusion force of the filter element 3 under the action of the suction force to determine whether the filter element 3 is blocked;

[0064] A pushing component, when the detection component detects that the filter element 3 is clogged, the pushing component is used to push the filter element 3 in the adding chamber 103 to the inside of the air inlet chamber 101, and squeeze the filter element 3 in the air inlet chamber 101 into the inside of the recovery chamber 102;

[0065] Among them, the inlet filter in the prior art is mostly provided with an integral filter element 3. After the filter element 3 filters out the impurities, the impurities block the entry of the subsequent airflow, which has an adverse effect.

[0066] It should be noted that, under the suction force of the screw machine 5, the filter element 3 has a tendency to move toward the suction port of the screw machine 5, thereby squeezing the detection component through the elastic sealing pad 4; when the filter element 3 is clogged by impurities, the squeezing force of the elastic sealing pad 4 on the detection component increases, and when the pressure reaches a preset value or a preset range, it is determined that the filter element 3 is clogged;

[0067] At this time, by starting the push rod assembly, the filter element 3 in the adding chamber 103 can be pushed to move into the air inlet chamber 101, and the filter element 3 in the adding chamber 103 pushes the filter element 3 in the air inlet chamber 101, so that after the filter element 3 in the adding chamber 103 enters the air inlet chamber 101, the filter element 3 in the air inlet chamber 101 is synchronously moved to the inside of the recovery chamber 102, completing the automatic switching of the filter element 3;

[0068] Since the clogging conditions of various positions of the filter element 3 are different, the end of the filter element 3 is first exposed to gas impurities, and therefore, clogging usually occurs first. After clogging, the entire filter element 3 needs to be replaced.

[0069] The present invention arranges the filter element 3 into a multi-layer structure. When part of the filter element 3 is clogged, it can be identified in time and automatically replaced with a new filter element 3. On the one hand, there is no need to replace the entire filter element 3, which is beneficial to saving replacement costs. On the other hand, timely and automatic replacement is also beneficial to reducing the adverse effects of blockage on the suction efficiency of the screw machine 5.

[0070] Since the elastic sealing pad 4 needs to face one side of the detection component during the insertion process of the filter element 3, in order to avoid errors during the insertion process of the staff, the following implementation method is proposed: the adding chamber 103 is located above each filter element 3 and is provided with a first insertion groove 6, the recovery chamber 102 is located above each filter element 3 and is provided with a third insertion groove 19, and the top of the air inlet chamber 101 is symmetrically provided with a plurality of second insertion grooves 7 in groups of two, and the two second insertion grooves 7 are respectively connected to the first insertion groove 6 and the third insertion groove 19, and a protrusion 8 is fixed on the inner wall of the second insertion groove 7, and a limiting groove 9 is provided on the side of the filter element 3 close to the protrusion 8:

[0071] Among them, by setting the limiting groove 9 on the filter element 3, when inserting, the limiting groove 9 needs to be facing the protrusion 8, and the filter element 3 cannot be inserted if the limiting groove 9 is facing the opposite direction, thereby ensuring the direction accuracy of the filter element 3 during the insertion process;

[0072] Furthermore, by providing the limiting groove 9, it is also helpful to reduce the contact area between the second filter plate and the first filter plate, thereby reducing the friction effect of the adjacent filter element 3 on the filter element 3 during the movement of the filter element 3 in the air inlet cavity 101;

[0073] A detachable protective cover 18 may be provided on the top of the housing 1, and the protective cover 18 may be provided to cover the opening on the top thereof to reduce the ingress of dust.

[0074] As an optional implementation, a pushing device may be provided at the bottom of the recovery chamber 102 to push out the old filter elements 3 uniformly. This is a prior art and will not be described in detail herein.

[0075] As a further embodiment of the present invention, the cross-sectional dimension of the limiting groove 9 is greater than the cross-sectional dimension of the protrusion 8 .

[0076] Furthermore, since the cross-sectional dimension of the limiting groove 9 is larger than the cross-sectional dimension of the protrusion 8, precise alignment is not required during the insertion process, thereby helping to improve the installation efficiency of maintenance personnel.

[0077] As a further embodiment of the present invention, a groove 10 is provided on the side wall of the filter element 3, a first inclined surface 11 is provided on the inner wall of the groove 10, and the pushing assembly includes an electric push rod 12, the electric push rod 12 is fixed on the inner wall of the recovery chamber 102, and a second inclined surface 13 is provided on the movable end of the electric push rod 12, and the second inclined surface 13 is adapted to the first inclined surface 11;

[0078] Among them, during the placement of the filter element 3, it is possible that the insertion depth is not accurate due to the staff, which may cause the filter element 3 to get stuck with the outer wall of the air inlet chamber 101. It is difficult to solve the above problem using a conventional pushing component. The present invention sets a groove 10. During the pushing process, the active end of the electric push rod 12 first enters the interior of the groove 10, and its second inclined surface 13 contacts the first inclined surface 11 in the groove 10. Under the guidance of the first inclined surface 11 and the second inclined surface 13, the filter element 3 can be pulled downward, so that the filter element 3 automatically returns to the accurate insertion depth first. As the active end of the electric push rod 12 continues to move, its active end disengages from the first inclined surface 11 and contacts the inner wall of the groove 10. At this time, continuing to push can push the filter element 3 into the interior of the air inlet chamber 101.

[0079] As a further embodiment of the present invention, the detection assembly includes two pressure sensors 14, both of which are installed inside the slot 2 and symmetrically arranged on both sides of the filter element 3;

[0080] Normally, the airflow can pass through the filter element 3 smoothly, but when blockage occurs, the blockage will reduce the effective filtering area of ​​the filter element 3, thereby increasing the resistance of the airflow passing through the filter element 3, resulting in an increase in the pressure on the filter element 3. At this time, the filter element 3 needs to be replaced in time, but during the replacement process, because the new filter element 3 pushes the old filter element 3 to move, the airflow is more likely to pass through the surface of the new filter element 3, resulting in a change in the airflow distribution. During the process of the airflow passing through the rear filter element 3, the airflow distribution on the surface of the rear filter element 3 is uneven, resulting in different pressure differences on both sides of the rear filter element 3, which can easily lead to misjudgment of subsequent sensors.

[0081] If only one pressure sensor 14 is provided, it is difficult to detect the pressure on both sides of the filter element 3 at the same time. Therefore, the present invention provides a pressure sensor 14 on both sides of the filter element 3 respectively. When it is detected that the pressure value rising rate on one side is greater than the preset rising rate, it is determined that the pressure value rises abnormally, and no replacement operation is performed.

[0082] Normally, the pressure sensor 14 is mostly arranged at the upper and lower sides to prevent the protruding contacts of the pressure sensor 14 from contacting the filter element 301 when the filter element 3 passes through, thereby damaging the filter element 301. However, the present invention needs to detect the pressure values ​​on both sides of the filter element 3. Therefore, the pressure sensor 14 must be installed at the two sides of the slot 2. In order to avoid damage to the filter element 301 during the process of replacing the filter element 3, the present invention proposes the following implementation method: a mounting groove 15 is provided on the inner wall of the slot 2, a telescopic rod 16 is fixed inside the mounting groove 15, and the movable end of the telescopic rod 16 is fixed to the corresponding pressure sensor 14, and a corresponding clearance hole 17 is provided on the elastic sealing pad 4;

[0083] Among them, the telescopic rod 16 can be a pneumatic or electric telescopic rod 16. When replacing the filter element 3, by starting the telescopic rod 16 to contract, the pressure sensor 14 is pulled into the installation groove 15, thereby avoiding contact with the filter element 301, which is beneficial to protecting the filter element 301.

[0084] As a further embodiment of the present invention, it also includes a processing terminal for controlling the pushing component to push, and the processing method of the processing terminal includes the following steps:

[0085] Obtaining the pressure value parameter of the filter element 3;

[0086] Compare the pressure value parameter with the preset pressure range, and generate pushing information when the pressure value parameter reaches the preset pressure range;

[0087] Control the pushing component to push the filter element 3 to move into the air inlet cavity 101 according to the pushing information;

[0088] The pressure value of the filter element 3 is detected by the detection component. When the pressure value reaches a preset pressure range, blockage is determined, thereby generating push information to control the replacement of the filter element 3.

[0089] As a further embodiment of the present invention, the processing method further comprises the following steps:

[0090] During the replacement process of the filter element 3 in the previous order, the pressure value parameters on both sides of the other filter element 3 are obtained and determined as the first parameter and the second parameter;

[0091] When one of the first parameter or the second parameter reaches a preset pressure range, the difference between the first parameter and the second parameter is calculated, and when the difference exceeds the preset difference, abnormal pressure value information is determined, and when the difference does not exceed the preset difference, normal pressure value information is determined;

[0092] According to the abnormal pressure value information, it is determined that the result of pushing information of the corresponding filter element 3 is invalid;

[0093] The result of determining the pushing information of the corresponding filter element 3 is valid according to the normal information of the pressure value;

[0094] In the replacement process, when the new filter element 3 pushes the old filter element 3 to move, the airflow is easier to pass through the surface of the new filter element 3, resulting in a change in the airflow distribution. When the airflow passes through the rear filter element 3, the airflow distribution on the surface of the rear filter element 3 is uneven, resulting in different pressure differences on both sides of the rear filter element 3, which can easily lead to misjudgment of subsequent sensors.

[0095] Therefore, during the replacement process of the preceding filter element 3, by detecting the pressure values ​​on both sides of the succeeding filter element 3, when the pressure value difference exceeds the preset value, it indicates that it is greatly affected by the airflow during the replacement process, and therefore, its pressure value result is invalid and cannot be directly judged to be replaced;

[0096] The preceding filter element 3 is the filter element 3 being replaced, and the succeeding filter element 3 is the filter element 3 behind it.

[0097] As a further embodiment of the present invention, the pushing information at least includes the position information of the filter element 3 to be pushed, and the processing method further includes the following steps;

[0098] Determine the target filter element 3 according to the position information of the filter element 3 to be pushed;

[0099] Obtaining the preceding pressure values ​​of all filter elements 3 whose pushing information results are valid behind the target filter element 3, the preceding pressure value being the pressure value when the target filter element 3 is not moved;

[0100] Adjusting the preset pressure range of the corresponding filter element 3 according to the previous pressure value;

[0101] Among them, some subsequent filter elements 3 are far away from the replaced filter element 3 and are less affected by the airflow, but during the replacement process, their pressure values ​​reach the level of replacement, indicating that the previous filter element 3 is blocked and has a greater impact on it, causing the detection component to fail. At this time, it is necessary to update its preset pressure range.

[0102] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A screw compressor inlet filter for argon recovery, characterized in that: include: A shell (1), the shell (1) comprising an air inlet chamber (101), a recovery chamber (102), and an addition chamber (103), the air inlet chamber (101) being arranged in the middle of the recovery chamber (102) and the addition chamber (103), an air inlet being arranged at one end of the air inlet chamber (101), and the other end of the air inlet chamber (101) being fixedly connected to the air inlet of a screw machine (5); A slot (2), the slot (2) being formed on the inner wall of the housing (1), the slot (2) connecting the air inlet chamber (101) with the recovery chamber (102) and the addition chamber (103) respectively; Two filter elements (3), elastic sealing pads (4) being fixed on the side walls of the two filter elements (3), one of the filter elements (3) being arranged inside the adding chamber (103), and the other of the filter elements (3) being arranged inside the air inlet chamber (101); A detection component, the detection component is arranged inside the slot (2), and the detection component is used to detect the squeezing force of the filter element (3) under the action of suction, so as to determine whether the filter element (3) is blocked; A pushing component, when the detection component detects that the filter element (3) is clogged, the pushing component is used to push the filter element (3) in the addition chamber (103) into the air intake chamber (101), and squeeze the filter element (3) in the air intake chamber (101) into the recovery chamber (102).

2. A screw compressor inlet filter for argon recovery according to claim 1, characterized in that: The adding chamber (103) is located above each filter element (3) and is provided with a first insertion groove (6); the recovery chamber (102) is located above each filter element (3) and is provided with a third insertion groove (19); a plurality of second insertion grooves (7) are symmetrically provided in groups of two at the top of the air inlet chamber (101); two of the second insertion grooves (7) are respectively connected to the first insertion groove (6) and the third insertion groove (19); a protrusion (8) is fixed on the inner wall of the second insertion groove (7); and a limiting groove (9) is provided on a side of the filter element (3) close to the protrusion (8).

3. A screw compressor inlet filter for argon recovery according to claim 2, characterized in that: The cross-sectional dimension of the limiting groove (9) is greater than the cross-sectional dimension of the protrusion (8).

4. The screw compressor inlet filter for argon recovery according to claim 2, characterized in that: The side wall of the filter element (3) is provided with a groove (10), the inner wall of the groove (10) is provided with a first inclined surface (11), the pushing assembly comprises an electric push rod (12), the electric push rod (12) is fixed on the inner wall of the recovery chamber (102), the movable end of the electric push rod (12) is provided with a second inclined surface (13), and the second inclined surface (13) is adapted to the first inclined surface (11).

5. The screw compressor inlet filter for argon recovery according to claim 1, characterized in that: The detection component comprises two pressure sensors (14), and the two pressure sensors (14) are both installed inside the slot (2) and symmetrically arranged on both sides of the filter element (3).

6. A screw compressor inlet filter for argon recovery according to claim 5, characterized in that: An installation groove (15) is provided on the inner wall of the slot (2), a telescopic rod (16) is fixed inside the installation groove (15), a movable end of the telescopic rod (16) is fixed to a corresponding pressure sensor (14), and a corresponding clearance hole (17) is provided on the elastic sealing pad (4).

7. The screw compressor inlet filter for argon recovery according to claim 5, characterized in that: It also includes a processing terminal for controlling the pushing component to push, and the processing method of the processing terminal includes the following steps: Obtaining a pressure value parameter of the filter element (3); Compare the pressure value parameter with the preset pressure range, and generate pushing information when the pressure value parameter reaches the preset pressure range; The pushing component is controlled according to the pushing information to push the filter element (3) to move toward the inside of the air inlet cavity (101).

8. The screw compressor inlet filter for argon recovery according to claim 7, characterized in that: The processing method also includes the following steps: During the replacement process of the filter element (3) in the previous order, the pressure value parameters on both sides of the other filter element (3) are obtained and determined as the first parameter and the second parameter; When one of the first parameter or the second parameter reaches a preset pressure range, the difference between the first parameter and the second parameter is calculated, and when the difference exceeds the preset difference, abnormal pressure value information is determined, and when the difference does not exceed the preset difference, normal pressure value information is determined; Determining, based on the abnormal pressure value information, that the result of the pushing information of the corresponding filter element (3) is invalid; The result of determining the pushing information of the corresponding filter element (3) based on the normal information of the pressure value is valid.

9. The screw compressor inlet filter for argon recovery according to claim 8, characterized in that: The pushing information at least includes the position information of the filter element (3) to be pushed, and the processing method further includes the following steps: Determining a target filter element (3) according to position information of the filter element (3) to be pushed; Obtaining the preceding pressure values ​​of all filter elements (3) with valid push information results behind the target filter element (3), wherein the preceding pressure value is the pressure value when the target filter element (3) is not moving; The preset pressure range of the corresponding filter element (3) is adjusted according to the preceding pressure value.

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