A negative pressure filtering device for cutting fluid used in photovoltaic silicon wafer production

Abstract

The application provides a negative pressure filtering device for cutting fluid used in photovoltaic silicon wafer production, and relates to the technical field of cutting fluid filtering. The application discloses a negative pressure filtering device for cutting fluid used in photovoltaic silicon wafer production, and relates to the technical field of cutting fluid filtering. The application discloses a negative pressure filtering device for cutting fluid used in photovoltaic silicon wafer production, and relates to the technical field of cutting fluid filtering. The application discloses a negative pressure filtering device for cutting fluid used in photovoltaic silicon wafer production, and relates to the technical field of cutting fluid filtering. The application discloses a negative pressure filtering device for cutting fluid used in photovoltaic silicon wafer production, and relates to the technical field of cutting fluid filtering. The application discloses a negative pressure filtering device for cutting fluid used in photovoltaic silicon wafer production, and relates to the technical field of cutting fluid filtering. The application discloses a negative pressure filtering device for cutting fluid used in photovoltaic silicon wafer production, and relates to the technical field of cutting fluid filtering. The application discloses a negative pressure filtering device for cutting fluid used in photovoltaic silicon wafer production, and relates to the technical field of cutting fluid filtering. The application discloses a negative pressure filtering device for cutting fluid used in photovoltaic silicon wafer production, and relates to the technical field of cutting fluid filtering. The application discloses a negative pressure filtering device for cutting fluid used in photovoltaic silicon wafer production, and relates to the technical field of cutting fluid filtering. The application discloses a negative pressure filtering device for cutting fluid used in photovoltaic silicon wafer production, and relates to the technical field of cutting fluid filtering. The application discloses a negative pressure filtering device for cutting fluid used in photovoltaic silicon wafer production, and relates to the technical field of cutting fluid filtering. The application discloses a negative pressure filtering device for cutting fluid used in photovoltaic silicon wafer production, and relates to the technical field of cutting fluid filtering. The application discloses a negative pressure filtering device for cutting fluid used in photovoltaic silicon wafer production, and relates to the technical field of cutting fluid filtering. The application discloses a negative pressure filtering device for cutting fluid used in photovoltaic silicon wafer production, and relates to the technical field of cutting fluid filtering. The application discloses a negative pressure filtering device for cutting fluid used in photovoltaic silicon wafer production, and relates to the technical field of cutting fluid filtering. The application discloses a negative pressure filtering device for cutting fluid used in photovoltaic

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of cutting fluid filtration, more particularly, relates to a negative pressure filtration device for cutting fluid used in photovoltaic silicon wafer production. BACKGROUND

[0002] In the production process of photovoltaic silicon wafers, cutting fluid filtration is a key link to ensure processing quality and efficiency. During the cutting process, cutting fluid will mix with waste debris and other impurities. If not filtered in time, these particles will reduce the cooling and lubricating performance of the cutting fluid, causing scratches or edge collapse on the surface of the silicon wafer, affecting the quality of the finished product.

[0003] The currently used cutting fluid filtration device still has the following problems: 1. Generally lacks a negative pressure auxiliary structure, resulting in slow cutting fluid filtration speed; 2. Waste debris is easily wrapped outside the filter screen, making it difficult for cutting fluid to pass through the filter screen; 3. Screws or bolts are usually used to connect the parts, resulting in a long time to clean the inside of the filtration device, and the screws used to install the filtration device may also become loose over time. SUMMARY

[0004] The present application relates to a negative pressure filtration device for cutting fluid used in photovoltaic silicon wafer production, which has a filter mounting, a circular sealing rod, a negative pressure auxiliary, a movable filter, and a positioning anti-loose piece. When the output shaft of the electric telescopic rod is extended, the pressure in the filter housing increases, causing the cutting fluid in the filter housing to pass through the right one-way valve. The circular push rod can move the movable mounting plate and the conical filter screen to the left at the same time, pushing the waste debris outside the conical filter screen. This facilitates the quick connection or separation of the rectangular mounting block and the filter housing, reducing the time it takes for the staff to clean the inner wall of the filter housing. This solves the problems of slow cutting fluid filtration speed, waste debris wrapping around the outside of the filter screen, and the use of screws or bolts to connect the parts.

[0005] The present application provides a negative pressure filtration device for cutting fluid used in photovoltaic silicon wafer production, comprising: a filter mounting, a negative pressure auxiliary, a movable filter, and a positioning anti-loose piece. The movable filter is installed on the filter mounting and is used to filter waste debris in the cutting fluid. The negative pressure auxiliary is installed on the filter mounting and is used to increase the filtration speed of the cutting fluid. The negative pressure auxiliary is also used to move the movable filter. The positioning anti-loose piece is provided in two groups and is installed on the left and right sides of the filter mounting. The two groups of positioning anti-loose pieces are used to prevent the filter mounting from becoming loose after installation and to position the negative pressure auxiliary.

[0006] In at least some embodiments, the filter mounting member comprises: a filter housing, four circular positioning rods, and a filter liquid inlet pipe; the filter housing is in a cylindrical structure as a whole; the four circular positioning rods are fixedly installed on the filter housing, and the top portions of the four circular positioning rods are respectively provided with chamfers; and the filter liquid inlet pipe is fixedly installed on the left side of the filter housing.

[0007] In at least some embodiments, the filter mounting member further comprises: a filter liquid outlet pipe, two one-way valves, and four mounting screws; the filter liquid outlet pipe is fixedly installed on the right side of the filter housing; the two one-way valves are respectively fixedly installed inside the filter liquid inlet pipe and the filter liquid outlet pipe; and the four mounting screws are inserted into the filter housing.

[0008] In at least some embodiments, the filter housing is internally fixedly installed with four circular sealing rods, and annular grooves are respectively formed in the four circular sealing rods.

[0009] In at least some embodiments, the negative pressure auxiliary member comprises: a rectangular mounting block and a negative pressure auxiliary disc; the rectangular mounting block is slidingly installed on the filter housing and the four circular positioning rods; the negative pressure auxiliary disc is slidingly installed inside the filter housing, and the negative pressure auxiliary disc is further slidingly connected with the four circular sealing rods; a rubber sealing ring is installed at the contact position of the negative pressure auxiliary disc and the filter housing, and a rubber sealing ring is also installed at the contact position of the negative pressure auxiliary disc and the four circular sealing rods.

[0010] In at least some embodiments, the negative pressure auxiliary member further comprises: an electric telescopic rod and a triangular pushing frame; the electric telescopic rod is fixedly installed on the top of the rectangular mounting block, and the output shaft of the electric telescopic rod is further fixedly connected with the negative pressure auxiliary disc; and the triangular pushing frame is fixedly installed on the bottom of the negative pressure auxiliary disc.

[0011] In at least some embodiments, the movable filter member comprises: a movable mounting plate, a conical filter screen, and a circular pushing rod; the movable mounting plate is slidingly installed outside the filter liquid inlet pipe; the conical filter screen is fixedly installed on the left side of the movable mounting plate and is located outside the filter liquid inlet pipe; and the circular pushing rod is slidingly installed on the filter housing, and a rubber sealing ring is installed at the contact position of the circular pushing rod and the filter housing; the left end of the circular pushing rod is fixedly installed on the movable mounting plate, and a round corner is arranged on the right side of the circular pushing rod.

[0012] In at least some embodiments, the movable filter member further comprises: a reset ring and a reset spring; the reset ring is fixedly installed on the right end of the circular pushing rod; and the reset spring is sleeved outside the circular pushing rod and is located between the filter housing and the reset ring.

[0013] In at least some embodiments, the positioning anti-loosening piece comprises a polygonal rod, a triangular mounting frame and positioning anti-loosening blocks; the polygonal rod is fixedly mounted on the filter housing; the triangular mounting frame is slidingly mounted outside the polygonal rod; the positioning anti-loosening blocks are provided in three and fixedly mounted on the triangular mounting frame; the upper positioning anti-loosening block is in contact with the rectangular mounting block, and the lower two positioning anti-loosening blocks are in contact with the two mounting screws.

[0014] In at least some embodiments, the positioning anti-loosening piece further comprises a circular limiting ring and a positioning magnet; the circular limiting ring is provided in two and fixedly mounted outside the polygonal rod; the positioning magnet is provided in two rings and fixedly mounted on the two circular limiting rings, and the inner ring of the positioning magnet is in contact with the triangular mounting frame.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] 1、When the output shaft of the electric telescopic rod is extended, the pressure in the filter housing becomes larger, so that the cutting fluid in the filter housing passes through the right one-way valve; when the output shaft of the electric telescopic rod is retracted, the pressure in the filter housing becomes smaller, so that the filtered cutting fluid passes through the left one-way valve; when the output shaft of the electric telescopic rod is in the extended state and the negative pressure auxiliary disc moves to the four annular grooves, the gas in the filter housing can be discharged through the four annular grooves, so that the cutting fluid cannot continue to be discharged through the right one-way valve; when the output shaft of the electric telescopic rod is in the retracted state and the negative pressure auxiliary disc moves to the four annular grooves, the external air can enter the filter housing through the four annular grooves, so that the filtered cutting fluid cannot continue to enter through the left one-way valve.

[0017] 2、The setting of the conical filter screen plays a filtering role on the waste debris in the cutting fluid; when the triangular pushing frame is in contact with the circular pushing rod, the triangular pushing frame continues to move downward, the circular pushing rod can drive the movable mounting plate and the conical filter screen to move leftward at the same time, and plays a pushing role on the waste debris outside the conical filter screen;

[0018] In addition, when the negative pressure auxiliary disc drives the triangular pushing frame to reset upward, the circular pushing rod can reset rightward under the action of the reset spring, so that a certain gap is produced between the conical filter screen and the pushed waste debris; when the conical filter screen resets rightward, there is no negative pressure at the conical filter screen, when the negative pressure auxiliary disc is separated from the four annular grooves, there is negative pressure at the conical filter screen, so that the pushed waste debris does not move rightward with the conical filter screen, the effect of pushing the waste debris outside the conical filter screen is better, and when the cutting fluid is filtered under negative pressure, the conical filter screen will not be located in a large amount of waste debris, which is beneficial to the cutting fluid passing through the conical filter screen.

[0019] 3、The two positioning anti-loosening blocks arranged above play a quick positioning role on the rectangular mounting block, facilitate workers to quickly connect or separate the rectangular mounting block and the filter shell, so that the workers take less time to clean the inner wall of the filter shell; meanwhile, the four positioning anti-loosening blocks below play an anti-loosening role on the four mounting screws; when the rectangular mounting block is in a disassembled state, the four positioning anti-loosening blocks below are in a separated state from the four mounting screws; when the rectangular mounting block is in a used state, the four positioning anti-loosening blocks below are in a contacted state with the four mounting screws; the four circular limiting rings and the four circles of positioning magnets play a positioning effect on the two triangular mounting racks, so that the two triangular mounting racks can be in a stable state after moving. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below.

[0021] The drawings described in the following description only relate to some embodiments of the present application, but not limit the present application.

[0022] In the drawings:

[0023] Figure 1 The three-dimensional structure schematic diagram of the present application is shown;

[0024] Figure 2 The structure schematic diagram of the filter mounting piece of the present application is shown;

[0025] Figure 3 The structure schematic diagram of the negative pressure auxiliary piece of the present application is shown;

[0026] Figure 4 The structure schematic diagram of the movable filter piece of the present application is shown;

[0027] Figure 5 The central section structure schematic diagram of the present application is shown; Figure 1

[0028] The local enlarged structure schematic diagram of the A area in the present application is shown; Figure 6 Figure 5 The structure schematic diagram of the positioning anti-loosening piece of the present application is shown;

[0029] Figure 7 The local enlarged structure schematic diagram of the B area in the present application is shown;

[0030] Figure 8 The local enlarged structure schematic diagram of the C area in the present application is shown; Figure 5

[0031] Figure 9 Figure 1

[0032] ​​​​Figure 10 The application is shown Figure 1 The local enlarged structure schematic view of the D area in the application is shown.

[0033] List of reference signs:

[0034] 100, filter mounting; 101, filter housing; 102, round positioning rod; 103, filter liquid inlet pipe; 104, filter liquid outlet pipe; 105, one-way valve; 106, mounting screw;

[0035] 200, round sealing rod; 201, annular groove;

[0036] 300, negative pressure auxiliary; 301, rectangular mounting block; 302, negative pressure auxiliary disc; 303, electric telescopic rod; 304, triangular pushing frame;

[0037] 400, movable filter; 401, movable mounting plate; 402, conical filter screen; 403, round pushing rod; 404, reset ring; 405, reset spring;

[0038] 500, positioning anti-loosening part; 501, polygonal rod; 502, triangular mounting frame; 503, positioning anti-loosening block; 504, round limiting ring; 505, positioning magnet. DETAILED DESCRIPTION

[0039] In order to make the purpose, scheme and advantages of the technical solutions of the application more clear, the technical solutions of the embodiments of the application will be described clearly and completely in the following with reference to the drawings of the specific embodiments of the application. Unless otherwise specified, the terms used herein have the meanings commonly used in the art. The same reference signs in the drawings represent the same components.

[0040] Embodiment: Please refer to Figures 1 to 10 The application provides a negative pressure filter device for cutting fluid used in photovoltaic silicon wafer production, which comprises a filter mounting 100, a negative pressure auxiliary 300, a movable filter 400 and a positioning anti-loosening part 500. The movable filter 400 is installed on the filter mounting 100, and is used to filter waste debris in the cutting fluid. The negative pressure auxiliary 300 is installed on the filter mounting 100, and is used to improve the filtering speed of the cutting fluid, and is also used to move the movable filter 400. The positioning anti-loosening part 500 is provided in two groups, and the two groups of positioning anti-loosening parts 500 are installed on the left and right sides of the filter mounting 100. The two groups of positioning anti-loosening parts 500 are used to prevent the filter mounting 100 from loosening after installation, and are also used to position the negative pressure auxiliary 300.

[0041] In the embodiments of the present disclosure, as Figure 2 and Figure 5As shown in the drawings, the filter mounting 100 comprises a filter housing 101, four circular positioning rods 102 and a filter liquid inlet pipe 103; the filter housing 101 is in a cylindrical structure as a whole; the four circular positioning rods 102 are fixedly installed on the filter housing 101, and the top portions of the four circular positioning rods 102 are respectively provided with chamfers; the filter liquid inlet pipe 103 is fixedly installed on the left side of the filter housing 101; the filter mounting 100 further comprises a filter liquid outlet pipe 104, two one-way valves 105 and four mounting screws 106; the filter liquid outlet pipe 104 is fixedly installed on the right side of the filter housing 101; the two one-way valves 105 are fixedly installed in the filter liquid inlet pipe 103 and the filter liquid outlet pipe 104 respectively; and the four mounting screws 106 are inserted into the filter housing 101.

[0042] The specific action is that, since the filter liquid inlet pipe 103 is fixedly installed on the left side of the filter housing 101, the filter liquid outlet pipe 104 is fixedly installed on the right side of the filter housing 101, and the two one-way valves 105 are fixedly installed in the filter liquid inlet pipe 103 and the filter liquid outlet pipe 104 respectively, the filtered cutting fluid can only enter the filter housing 101 through the filter liquid inlet pipe 103; and the cutting fluid in the filter housing 101 can only be discharged through the filter liquid outlet pipe 104.

[0043] In the embodiments of the present disclosure, as shown in Figure 3 and Figure 6 The inside of the filter housing 101 is fixedly installed with four circular sealing rods 200, and annular grooves 201 are respectively formed in the four circular sealing rods 200.

[0044] The negative pressure auxiliary 300 comprises a rectangular mounting block 301 and a negative pressure auxiliary disc 302; the rectangular mounting block 301 is slidingly installed on the filter housing 101 and the four circular positioning rods 102; the negative pressure auxiliary disc 302 is slidingly installed in the inside of the filter housing 101, and the negative pressure auxiliary disc 302 is further slidingly connected with the four circular sealing rods 200; rubber sealing rings are installed at the contact positions of the negative pressure auxiliary disc 302 and the filter housing 101, and rubber sealing rings are also installed at the contact positions of the negative pressure auxiliary disc 302 and the four circular sealing rods 200; the negative pressure auxiliary 300 further comprises an electric telescopic rod 303 and a triangular pushing frame 304; the electric telescopic rod 303 is fixedly installed on the top of the rectangular mounting block 301, and the output shaft of the electric telescopic rod 303 is further fixedly connected with the negative pressure auxiliary disc 302; and the triangular pushing frame 304 is fixedly installed on the bottom of the negative pressure auxiliary disc 302.

[0045] The specific action is that the negative pressure auxiliary disc 302 is slidably installed in the inside of the filter shell 101, the output shaft of the electric telescopic rod 303 is fixedly connected with the negative pressure auxiliary disc 302, and the contact position of the negative pressure auxiliary disc 302 with the filter shell 101 is provided with a rubber sealing ring; when the output shaft of the electric telescopic rod 303 is extended, the pressure in the filter shell 101 is increased, so that the cutting fluid in the filter shell 101 passes through the right one-way valve 105; when the output shaft of the electric telescopic rod 303 is retracted, the pressure in the filter shell 101 is reduced, so that the filtered cutting fluid passes through the left one-way valve 105; and because the annular grooves 201 are respectively formed in the four circular sealing rods 200, the negative pressure auxiliary disc 302 is slidably connected with the four circular sealing rods 200, and the contact position of the negative pressure auxiliary disc 302 with the four circular sealing rods 200 is provided with a rubber sealing ring, when the output shaft of the electric telescopic rod 303 is in the extended state and the negative pressure auxiliary disc 302 moves to the four annular grooves 201, the gas in the filter shell 101 can be discharged through the four annular grooves 201, so that the cutting fluid cannot continue to be discharged through the right one-way valve 105; when the output shaft of the electric telescopic rod 303 is in the retracted state and the negative pressure auxiliary disc 302 moves to the four annular grooves 201, the external air can enter the filter shell 101 through the four annular grooves 201, so that the filtered cutting fluid cannot continue to enter through the left one-way valve 105.

[0046] In the embodiments of the present disclosure, as shown in Figure 4 and Figure 6 The movable filter 400 includes a movable mounting plate 401, a conical filter screen 402 and a circular push rod 403; the movable mounting plate 401 is slidably installed outside the filter liquid inlet pipe 103; the conical filter screen 402 is fixedly installed on the left side of the movable mounting plate 401, and the conical filter screen 402 is located outside the filter liquid inlet pipe 103; the circular push rod 403 is slidably installed on the filter shell 101, and a rubber sealing ring is installed at the contact position of the circular push rod 403 with the filter shell 101; the left end of the circular push rod 403 is fixedly installed on the movable mounting plate 401, and a round corner is arranged on the right side of the circular push rod 403; the movable filter 400 further includes a reset ring 404 and a reset spring 405; the reset ring 404 is fixedly installed on the right end of the circular push rod 403; the reset spring 405 is sleeved outside the circular push rod 403, and the reset spring 405 is located between the filter shell 101 and the reset ring 404;

[0047] Specific action is: because the conical filter screen 402 is fixedly installed on the left side of the movable mounting plate 401, and the conical filter screen 402 is located outside the filtering liquid inlet pipe 103, the waste debris in the cutting fluid is filtered; because the circular push rod 403 is slidably installed on the filter housing 101, and the left end of the circular push rod 403 is fixedly installed on the movable mounting plate 401, and the triangular push frame 304 is fixedly installed on the bottom of the negative pressure auxiliary disc 302, when the triangular push frame 304 contacts the circular push rod 403, and the triangular push frame 304 continues to move downward, the circular push rod 403 can drive the movable mounting plate 401 and the conical filter screen 402 to move leftward at the same time, which plays a pushing role on the waste debris outside the conical filter screen 402;

[0048] In addition, because the reset ring 404 is fixedly installed on the right end of the circular push rod 403, and the reset spring 405 is sleeved outside the circular push rod 403, and the reset spring 405 is located between the filter housing 101 and the reset ring 404, when the negative pressure auxiliary disc 302 drives the triangular push frame 304 to reset upward, the circular push rod 403 can reset rightward under the action of the reset spring 405, so that a gap is produced between the conical filter screen 402 and the pushed waste debris; because the four circular sealing rods 200 are respectively provided with annular grooves 201, when the conical filter screen 402 resets rightward, there is no negative pressure at the position of the conical filter screen 402, when the negative pressure auxiliary disc 302 is separated from the four annular grooves 201, there is negative pressure at the position of the conical filter screen 402, so that the pushed waste debris does not move rightward with the conical filter screen 402, the effect of pushing the waste debris outside the conical filter screen 402 is better, and when the cutting fluid is filtered under negative pressure, the conical filter screen 402 will not be located in a large amount of waste debris, which is beneficial to the cutting fluid passing through the conical filter screen 402.

[0049] In the embodiment of the present disclosure, as shown in Figures 7 to 10 The positioning anti-loosening piece 500 includes a polygonal rod 501, a triangular mounting frame 502 and three positioning anti-loosening blocks 503; the polygonal rod 501 is fixedly installed on the filter housing 101; the triangular mounting frame 502 is slidably installed outside the polygonal rod 501; the three positioning anti-loosening blocks 503 are fixedly installed on the triangular mounting frame 502; the upper positioning anti-loosening block 503 is in contact with the rectangular mounting block 301, and the lower two positioning anti-loosening blocks 503 are in contact with the two mounting screws 106; the positioning anti-loosening piece 500 further includes a circular limiting ring 504 and a positioning magnet 505; the two circular limiting rings 504 are fixedly installed outside the polygonal rod 501; the two circles of the positioning magnet 505 are fixedly installed on the two circular limiting rings 504, and the inner circle of the positioning magnet 505 is in contact with the triangular mounting frame 502;

[0050] The specific action is that: because six positioning anti-loosening blocks 503 are fixedly installed on the two triangular mounting frames 502, and the two upper positioning anti-loosening blocks 503 are in contact with the rectangular mounting block 301, and the four lower positioning anti-loosening blocks 503 are in contact with the four mounting screws 106, the rectangular mounting block 301 is quickly limited, the staff can quickly connect or separate the rectangular mounting block 301 and the filter shell 101, and the staff takes less time to clean the inner wall of the filter shell 101; at the same time, the four lower positioning anti-loosening blocks 503 play an anti-loosening role on the four mounting screws 106; when the rectangular mounting block 301 is in a disassembled state, the four lower positioning anti-loosening blocks 503 are in a separated state from the four mounting screws 106; when the rectangular mounting block 301 is in a used state, the four lower positioning anti-loosening blocks 503 are in a contacted state with the four mounting screws 106; and because the four circular limiting rings 504 are fixedly installed outside the two polygonal rods 501, and the four circular positioning magnets 505 are fixedly installed on the four circular limiting rings 504, and the two inner circular positioning magnets 505 are in contact with the two triangular mounting frames 502, the two triangular mounting frames 502 are positioned, so that the two triangular mounting frames 502 can be in a stable state after moving.

[0051] The specific use and action of the embodiment are as follows:

[0052] When the application is used, first, the staff installs and fixes the filter shell 101 through four mounting screws 106, then pushes two triangular mounting racks 502 inward, so that the two triangular mounting racks 502 are in contact with the two circular limiting rings 504 on the inner side, the upper two positioning anti-loosening blocks 503 are arranged to quickly limit the rectangular mounting block 301, which facilitates the staff to quickly connect the rectangular mounting block 301 and the filter shell 101; the lower four positioning anti-loosening blocks 503 play a loosening effect on the four mounting screws 106; when the output shaft of the electric telescopic rod 303 is stretched out, the pressure in the filter shell 101 becomes larger, so that the cutting fluid in the filter shell 101 passes through the right one-way valve 105; when the output shaft of the electric telescopic rod 303 is retracted, the pressure in the filter shell 101 becomes smaller, so that the filtered cutting fluid passes through the left one-way valve 105; when the output shaft of the electric telescopic rod 303 is in the stretched-out state and the negative pressure auxiliary disc 302 moves to the four annular grooves 201, the gas in the filter shell 101 can be discharged through the four annular grooves 201, so that the cutting fluid cannot continue to be discharged through the right one-way valve 105; when the output shaft of the electric telescopic rod 303 is in the retracted state and the negative pressure auxiliary disc 302 moves to the four annular grooves 201, external air can enter the filter shell 101 through the four annular grooves 201, so that the filtered cutting fluid cannot continue to enter through the left one-way valve 105; the arrangement of the conical filter screen 402 plays a filtering effect on the waste debris in the cutting fluid; when the triangular pushing rack 304 is in contact with the circular pushing rod 403, and the triangular pushing rack 304 continues to move downward, the circular pushing rod 403 can drive the movable mounting plate 401 and the conical filter screen 402 to move leftward at the same time, which plays a pushing effect on the waste debris outside the conical filter screen 402; when the negative pressure auxiliary disc 302 drives the triangular pushing rack 304 to reset upward, the circular pushing rod 403 can reset rightward under the action of the reset spring 405, so that a gap is produced between the conical filter screen 402 and the pushed waste debris; when the conical filter screen 402 resets rightward, there is no negative pressure at the conical filter screen 402, when the negative pressure auxiliary disc 302 is separated from the four annular grooves 201, there is negative pressure at the conical filter screen 402, which avoids that the pushed waste debris moves rightward with the conical filter screen 402, so that the effect of pushing the waste debris outside the conical filter screen 402 is better, and when the cutting fluid is filtered under negative pressure, the conical filter screen 402 will not be located in a large amount of waste debris, which is beneficial to the cutting fluid passing through the conical filter screen 402.

[0053] In this paper, the following points need attention:

[0054] 1. The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the usual design.

[0055] 2. Embodiments of the present disclosure and features in embodiments can be combined with each other to obtain new embodiments in the case of no conflict.

[0056] The above merely describes specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A negative pressure filtration device for cutting fluid used in photovoltaic silicon wafer production, comprising: The utility model provides a filter mounting piece (100), negative pressure auxiliary piece (300), movable filter piece (400) and positioning anti-loose piece (500), its characterized in be that movable filter piece (400) is installed on filter mounting piece (100), and movable filter piece (400) is used for filtering the waste debris in cutting fluid, negative pressure auxiliary piece (300) is installed on filter mounting piece (100), and negative pressure auxiliary piece (300) is used for improving the filtering speed of cutting fluid, and negative pressure auxiliary piece (300) is also used for moving movable filter piece (400), positioning anti-loose piece (500) is equipped with two groups, and two groups of positioning anti-loose piece (500) are installed on the left and right sides of filter mounting piece (100), and two groups of positioning anti-loose piece (500) are used for preventing filter mounting piece (100) from loosening after installation, and two groups of positioning anti-loose piece (500) are also used for positioning negative pressure auxiliary piece (300), The filter mounting piece (100) comprises a filter shell (101), a filter liquid inlet pipe (103), a filter liquid outlet pipe (104) and a one-way valve (105), two one-way valves (105) are fixedly installed in the filter liquid inlet pipe (103) and the filter liquid outlet pipe (104) respectively, and four circular sealing rods (200) are fixedly installed in the filter shell (101), and annular grooves (201) are formed in the four circular sealing rods (200) respectively, The negative pressure auxiliary piece (300) comprises a negative pressure auxiliary disc (302), an electric telescopic rod (303) and a triangular pushing frame (304), the negative pressure auxiliary disc (302) is slidably installed in the filter shell (101), and the negative pressure auxiliary disc (302) is also connected with the four circular sealing rods (200) in a sliding mode, the output shaft of the electric telescopic rod (303) is fixedly connected with the negative pressure auxiliary disc (302), and the triangular pushing frame (304) is fixedly installed at the bottom of the negative pressure auxiliary disc (302), The movable filter piece (400) comprises a movable mounting plate (401), a conical filter screen (402), a circular pushing rod (403), a reset ring (404) and a reset spring (405), the movable mounting plate (401) is slidably installed outside the filter liquid inlet pipe (103), the conical filter screen (402) is fixedly installed at the left side of the movable mounting plate (401) and located outside the filter liquid inlet pipe (103), the circular pushing rod (403) is slidably installed on the filter shell (101), and a rubber sealing ring is arranged at the contact position of the circular pushing rod (403) and the filter shell (101), and the left end of the circular pushing rod (403) is fixedly installed on the movable mounting plate (401), Gas passes through the annular groove (201) when the negative pressure auxiliary disc (302) moves to the annular groove (201); the movable mounting plate (401) and the conical filter screen (402) can be driven to move when the triangular push frame (304) is in contact with the circular push rod (403); the circular push rod (403) resets when the triangular push frame (304) resets upward, at this time, there is no negative pressure at the conical filter screen (402), and there is negative pressure at the conical filter screen (402) when the negative pressure auxiliary disc (302) is separated from the annular groove (201).

2. The negative pressure filtration device for cutting fluid used in photovoltaic silicon wafer production according to claim 1, characterized in that, The filter mounting piece (100) further comprises a circular positioning rod (102); the filter shell (101) is in a cylindrical structure as a whole; four circular positioning rods (102) are provided, and the four circular positioning rods (102) are fixedly installed on the filter shell (101), and the top portions of the four circular positioning rods (102) are respectively provided with chamfers; and the filter liquid inlet pipe (103) is fixedly installed on the left side of the filter shell (101).

3. The negative pressure filtration device for cutting fluid used in photovoltaic silicon wafer production according to claim 2, characterized in that, The filter mounting piece (100) further comprises a mounting screw (106); the filter liquid outlet pipe (104) is fixedly installed on the right side of the filter shell (101); and four mounting screws (106) are provided, and the four mounting screws (106) are inserted into the filter shell (101).

4. The negative pressure filtration device for cutting fluid used in photovoltaic silicon wafer production according to claim 3, characterized in that, The negative pressure auxiliary piece (300) further comprises a rectangular mounting block (301); the rectangular mounting block (301) is slidably installed on the filter shell (101) and the four circular positioning rods (102); a rubber sealing ring is installed at the contact position of the negative pressure auxiliary disc (302) and the filter shell (101), and a rubber sealing ring is also installed at the contact position of the negative pressure auxiliary disc (302) and the four circular sealing rods (200).

5. The negative pressure filtration device for cutting fluid used in photovoltaic silicon wafer production according to claim 4, characterized in that, The electric telescopic rod (303) is fixedly installed at the top of the rectangular mounting block (301).

6. The negative pressure filtration device for cutting fluid used in photovoltaic silicon wafer production according to claim 1, characterized in that, The right side of the circular push rod (403) is provided with a round corner.

7. The negative pressure filtration device for cutting fluid used in photovoltaic silicon wafer production according to claim 1, characterized in that, The reset ring (404) is fixedly installed at the right end of the circular push rod (403); and the reset spring (405) is sleeved outside the circular push rod (403), and the reset spring (405) is located between the filter shell (101) and the reset ring (404).

8. The negative pressure filtration device for cutting fluid used in photovoltaic silicon wafer production according to claim 4, characterized in that, The positioning anti-loosening piece (500) comprises a polygonal rod (501), a triangular mounting frame (502) and a positioning anti-loosening block (503); the polygonal rod (501) is fixedly installed on the filter shell (101); the triangular mounting frame (502) is slidably installed outside the polygonal rod (501); three positioning anti-loosening blocks (503) are provided, and the three positioning anti-loosening blocks (503) are fixedly installed on the triangular mounting frame (502); the upper positioning anti-loosening block (503) is in contact with the rectangular mounting block (301), and the lower two positioning anti-loosening blocks (503) are in contact with the two mounting screws (106).

9. The negative pressure filtration device for cutting fluid used in photovoltaic silicon wafer production according to claim 8, characterized in that, The positioning anti-loosening piece (500) further comprises a circular limiting ring (504) and a positioning magnet (505); the circular limiting ring (504) is provided with two, and the two circular limiting rings (504) are fixedly installed outside the polygonal rod (501); the positioning magnet (505) is provided with two circles, and the two circles of the positioning magnet (505) are fixedly installed on the two circular limiting rings (504), and the inner circle of the positioning magnet (505) is in contact with the triangular mounting frame (502).

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