A device for detecting antibiotics in wastewater from the pharmaceutical industry

Abstract

The present invention relates to the technical field of pharmaceutical industrial wastewater detection, and discloses a device for detecting antibiotics in pharmaceutical industrial wastewater, comprising a box body, a water tank is arranged on one side of the upper end of the box body, and a fixed disk is installed on the upper end of the box body located on one side of the water tank, a fixed rod is arranged in the middle of the upper surface of the fixed disk, a turntable is arranged inside the box body directly below the fixed disk, and a detector is arranged on one side of the turntable inside the box body, and a plurality of push rods are distributed in an annular manner on the surface of the fixed disk located on the outside of the fixed rod, a piston is connected to one end of the push rod, and a sampling tube is sleeved on the outside of the piston. The present invention integrates the detector and the sampling device into one, and is easy to move, and is convenient for on-site detection, solving the problem that the traditional antibiotic detector is inconvenient to move and difficult to detect on-site, and realizes sampling and detection of multiple groups of samples at one time, and realizes automatic detection of multiple groups of sample liquids in sequence, thereby improving the accuracy of detection.

Description

Technical Field

[0001] The invention relates to the technical field of pharmaceutical industry wastewater detection, in particular to a device for detecting antibiotics in pharmaceutical industry wastewater. Background Art

[0002] Antibiotics refer to a class of secondary metabolites produced by microorganisms (including bacteria, fungi, and actinomycetes) or higher animals and plants in the course of their lives that have anti-pathogen or other activities, and are chemical substances that can interfere with the developmental functions of other living cells. Commonly used antibiotics in clinical practice include extracts from microbial culture media and chemically synthesized or semi-synthesized compounds. Antibiotics have rapid and obvious therapeutic effects in resisting or treating various diseases caused by non-viral infections. Since their discovery, they have been widely used in various medical treatments. In addition, in the pharmaceutical industry, if the antibiotic content in the wastewater is too high, it will cause serious water pollution, and it will also lead to complicated wastewater treatment processes and poor results. Therefore, before the pharmaceutical industry wastewater is discharged, the antibiotic content in the wastewater needs to be tested and treated before discharge.

[0003] However, existing antibiotic detection equipment either has insufficient detection accuracy or is inconvenient to carry, which is particularly inconvenient in some on-site detection situations. Moreover, when sampling on-site, it is necessary to carry sampling equipment to extract sample liquid, which adds a burden to the detection work. Therefore, those skilled in the art provide a device for detecting antibiotics in pharmaceutical industrial wastewater to solve the problems raised in the above background technology. Summary of the Invention

[0004] The object of the present invention is to provide a device for detecting antibiotics in pharmaceutical industrial wastewater to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: An apparatus for detecting antibiotics in pharmaceutical industrial wastewater, comprising a box body, one side of the upper end of the box body is provided with a water tank, and a fixed disk is installed on the upper end of the box body on one side of the water tank. An installation groove is provided on the upper surface of the box body corresponding to the fixed disk. A fixed rod is provided in the middle of the upper surface of the fixed disk. The other side of the upper end of the box body is provided with a control panel, and a display screen is provided on the upper surface of the control panel. Inside the box body, a turntable is provided directly below the fixed disk, and a detector is provided on one side of the turntable inside the box body. A U-shaped detection table is provided on the side surface of the detector corresponding to the turntable. A water gun is provided on the other side of the turntable inside the box body. A battery box is provided behind the water gun. A driving motor is connected to the middle of the lower surface of the turntable, and a fixing plate is installed at the bottom of the driving motor. A positioning screw rod penetrates through one side of the upper surface of the fixing plate. A chute is provided on the bottom end inside the box body corresponding to the lower surface of the fixing plate, and a plurality of positioning holes are equidistantly provided on the bottom end inside the box body corresponding to the positioning screw rod. A plurality of push rods are annularly distributed on the surface of the fixed disk outside the fixed rod. One end of the push rod is connected to a piston, and a sampling tube is sleeved outside the piston. The lower end of the sampling tube is provided with a sampling outlet.

[0006] As a further scheme of the present invention: Moving wheels are provided at the four corners of the lower end of the box body, and a box door is rotatably connected to one side surface of the box body. A handrail is provided on the other side surface of the box body near the water tank. A water injection port is provided on the upper surface of the water tank.

[0007] As a further scheme of the present invention: A connecting rope is connected to the upper end of the water gun, and a water pipe is provided between the water gun and the water tank. A water pump is provided inside the water tank, and the output end of the water pump is connected to one end of the water pipe, and the other end of the water pipe is connected to the water gun in a communicating manner. The water gun is connected to the box body through the connecting rope.

[0008] As a further scheme of the present invention: Two fixed disks are provided in total. The two fixed disks are connected to each other through a fixed rod. The sampling tube is fixedly connected to the fixed disk. An opening is provided on the upper surface of the fixed disk corresponding to the push rod. One end of the push rod penetrates through the fixed disk through the opening and extends into the sampling tube to be connected to the piston. The outer diameter of the piston is adapted to the inner diameter of the sampling tube, and the piston is made of rubber.

[0009] As a further solution of the present invention: a pull ring is provided at the top of the fixing rod, the outer diameter of the fixing disk is adapted to the inner diameter of the mounting groove, a positioning sleeve is provided in the middle of the lower surface of the lowest fixing disk, a second magnetic piece is provided at the inner top of the positioning sleeve, a positioning column is installed in the middle of the upper surface of the turntable corresponding to the positioning sleeve, a first magnetic piece is provided on the upper surface of the positioning column corresponding to the second magnetic piece, and the relative surfaces of the first magnetic piece and the second magnetic piece are of opposite magnetic properties.

[0010] As a further solution of the present invention: a rotating shaft is provided at the lower end of the positioning column, and a plurality of flow guide tubes are provided in a ring shape on the outer side of the rotating shaft corresponding to the sample outlet, and a plurality of liquid storage tanks are provided around the upper surface of the turntable corresponding to the lower end of the flow guide tube. The flow guide tube is a conical hollow structure, and the upper end of the flow guide tube corresponds to the lower end of the sample outlet, and the lower end of the flow guide tube is located on the inner side of the liquid storage tank.

[0011] As a further solution of the present invention: a slider is provided on the lower surface of the fixed plate corresponding to the slide groove, and a threaded hole is opened on the upper surface of the fixed plate corresponding to the positioning screw. The fixed plate and the box body are slidably connected through the slide groove and the slider, and one end of the positioning screw passes through the threaded hole and is threadedly connected to the positioning hole.

[0012] As a further solution of the present invention: the turntable is rotatably connected to the positioning column via a rotating shaft, and the lower end of the turntable is fixedly connected to the output end of the driving motor, and the outer edge of the turntable extends to the inner side of the detection table.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the device designed by the present invention for detecting antibiotics in pharmaceutical industrial wastewater, in actual operation, by integrating the detector and the sampling device into one, and being easy to move, facilitates on-site detection of antibiotics in pharmaceutical industrial wastewater, solves the problem that traditional antibiotic detectors are inconvenient to move and difficult on-site detection, and the detection equipment of the present design can realize sampling and detection of multiple groups of samples at one time, and the sampling is simple and convenient, and multiple groups of sample liquids can be automatically detected in sequence, which can further improve the accuracy of the detection, and improve the cleanliness of the equipment by making it easy to clean the sampling equipment and the detection equipment, and has a better on-site detection effect for industrial wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of a device for detecting antibiotics in pharmaceutical industrial wastewater;

[0015] Figure 2 A schematic diagram of the internal structure of a box in a device for detecting antibiotics in pharmaceutical industrial wastewater;

[0016] Figure 3A schematic diagram of the connection between a rotating disk and a fixed disk in a device for detecting antibiotics in pharmaceutical industrial wastewater;

[0017] Figure 4 A schematic diagram of the connection between a fixed plate and a sampling tube in a device for detecting antibiotics in pharmaceutical industrial wastewater;

[0018] Figure 5 This is a schematic diagram of the connection between the turntable and the drive motor in a device used to detect antibiotics in pharmaceutical industrial wastewater.

[0019] In the figure: 1. Box body; 2. Fixed plate; 3. Water tank; 4. Water filling port; 5. Handrail; 6. Box door; 7. Display screen; 8. Control panel; 9. Moving wheel; 10. Mounting slot; 11. Connecting rope; 12. Water gun; 13. Battery box; 14. Driving motor; 15. Fixed plate; 16. Positioning hole; 17. Positioning screw; 18. Slide; 19. Turntable; 20. Detector; 21. Testing table; 22. Fixed rod; 23. Push rod; 24. Liquid storage tank; 25. Piston; 26. Sampling tube; 27. Positioning sleeve; 28. Sample outlet; 29. ​​Guide tube; 30. Positioning column; 31. First magnetic plate; 32. Slider; 33. Threaded hole. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figures 1 to 5In an embodiment of the present invention, a device for detecting antibiotics in pharmaceutical industrial wastewater includes a box body 1, a water tank 3 is provided on one side of the upper end of the box body 1, and a fixed disk 2 is installed on the upper end of the box body 1 on one side of the water tank 3, a mounting groove 10 is provided on the upper surface of the box body 1 corresponding to the fixed disk 2, a fixing rod 22 is provided in the middle of the upper surface of the fixed disk 2, a control panel 8 is provided on the other side of the upper end of the box body 1, and a display screen 7 is provided on the upper surface of the control panel 8, a turntable 19 is provided directly below the fixed disk 2 inside the box body 1, and a detector 20 is provided on one side of the turntable 19 inside the box body 1, a U-shaped detection table 21 is provided on one side of the detector 20 corresponding to the turntable 19, a water gun 12 is provided on the other side of the turntable 19 inside the box body 1, a battery box 13 is provided on the rear side of the water gun 12, a drive motor 14 (a servo motor of the LAFERT series) is connected to the middle of the lower surface of the turntable 19, a fixing plate 15 is installed at the bottom of the drive motor 14, and the fixing plate A positioning screw 17 is passed through one side of the upper surface of 15, a slide groove 18 is opened on the lower surface of the fixed plate 15 corresponding to the inner bottom end of the box body 1, and a plurality of positioning holes 16 are opened at equal distances at the inner bottom end of the box body 1 corresponding to the positioning screw 17, a slider 32 is provided on the lower surface of the fixed plate 15 corresponding to the slide groove 18, and a threaded hole 33 is opened on the upper surface of the fixed plate 15 corresponding to the positioning screw 17. The fixed plate 15 is slidably connected to the box body 1 through the slide groove 18 and the slider 32, and one side of the positioning screw 17 is opened. The end passes through the threaded hole 33 and is threadedly connected to the positioning hole 16. When the work is completed, the fixing plate 15 can be used to pull the drive motor 14 and the turntable 19 out of the box body 1, thereby exposing the liquid storage tank 24 to the outside of the box body 1, which is convenient for the staff to clean the sample liquid remaining in the liquid storage tank 24. After cleaning, the turntable 19 is pushed back into the box body 1, and then the positioning screw 17 is used to pass through the threaded hole 33 and screwed into the corresponding positioning hole 16 to facilitate the fixation of the fixing plate 15.

[0022] Movable wheels 9 are provided at the four corners of the lower end of the box body 1, and a box door 6 is rotatably connected to one side of the box body 1. A handrail 5 is provided on the other side of the box body 1 near the water tank 3. A water inlet 4 is provided on the upper surface of the water tank 3. The upper end of the water gun 12 is connected to a connecting rope 11, and a water pipe is provided between the water gun 12 and the water tank 3. A water pump is provided inside the water tank 3, and the output end of the water pump is connected to one end of the water pipe, and the other end of the water pipe is connected to the water gun 12. The water gun 12 is connected to the box body 1 by a connecting rope 11. When cleaning the sample liquid remaining in the liquid storage tank 24, the water gun 12 can be used to clean the liquid storage tank 24 to improve the cleanliness of the liquid storage tank 24 and facilitate the next detection.

[0023] The surface of the fixed disk 2 is located on the outside of the fixed rod 22 and is annularly distributed with multiple push rods 23. One end of the push rod 23 is connected to a piston 25. The outside of the piston 25 is sleeved with a sampling tube 26. The lower end of the sampling tube 26 is provided with a sampling port 28. There are two fixed disks 2 in total. The two fixed disks 2 are connected by a fixed rod 22. The sampling tube 26 is fixedly connected to the fixed disk 2. An opening is opened on the upper surface of the fixed disk 2 corresponding to the push rod 23. One end of the push rod 23 passes through the fixed disk 2 through the opening and extends to the inside of the sampling tube 26 and is connected to the piston 25. The outer diameter of the piston 25 is the same as the outer diameter of the sampling tube 26. The inner diameter is adapted, and the piston 25 is made of rubber. Before testing antibiotics in pharmaceutical industrial wastewater, the fixed disk 2 can be pulled out from the box body 1, and then multiple sampling tubes 26 are used to sample wastewater from different areas. During sampling, by pulling the push rod 23, it drives the piston 25 to move from one end of the sampling tube 26 near the sampling port 28 to the other end, and then the negative pressure generated inside the sampling tube 26 is used to draw the wastewater sample from the sampling port 28 into the sampling tube 26. The principle is consistent with the principle of the syringe, thereby realizing the extraction of pharmaceutical industrial wastewater, and the operation is simple.

[0024] The top of the fixing rod 22 is provided with a pull ring, and the outer diameter of the fixing disk 2 is adapted to the inner diameter of the mounting groove 10. A positioning sleeve 27 is provided in the middle of the lower surface of the lowest fixing disk 2, and a second magnetic piece is provided at the top inner end of the positioning sleeve 27. A positioning post 30 is installed at the middle of the upper surface of the turntable 19 corresponding to the positioning sleeve 27, and a first magnetic piece 31 is provided at the upper surface of the positioning post 30 corresponding to the second magnetic piece. The magnetic properties of the opposing surfaces of the first magnetic piece 31 and the second magnetic piece are opposite. After the sampling is completed, the fixing disk 2 is placed into the mounting groove 10 on the box body 1, so that the positioning sleeve 27 on the lower surface of the lowest fixing disk 2 (the two fixing disks 2 are designed as upper and lower layers) is just fitted on the positioning post 30, and the second magnetic piece at the top inner end of the positioning sleeve 27 will attract each other with the first magnetic piece 31 on the upper surface of the positioning post 30, thereby achieving the fixation of the fixing disk 2. The first magnetic piece 31 and the second magnetic piece are both circular magnets.

[0025] The lower end of the positioning column 30 is provided with a rotating shaft, and the outer side surface of the rotating shaft is provided with a plurality of guide tubes 29 in an annular shape corresponding to the sample outlet 28. The upper surface of the turntable 19 is provided with a plurality of liquid storage tanks 24 around the lower end of the guide tube 29 corresponding to the sample outlet 28. The guide tube 29 is a conical hollow structure, and the upper end of the guide tube 29 corresponds to the lower end of the sample outlet 28. The lower end of the guide tube 29 is located on one side of the inner part of the liquid storage tank 24. After the above-mentioned fixed disk 2 is sampled and reset, the sample outlet 28 below the fixed disk 2 is just at the upper end of the guide tube 29 (the upper end of the guide tube 29). The outer diameter is larger than the outer diameter of the lower port), and then the push rod 23 is pushed to push the piston 25 to move inside the sampling tube 26 toward the sample outlet 28, thereby pushing out the sample liquid inside the sampling tube 26. The sample liquid pushed out from the sample outlet 28 just drips into the upper port of the guide tube 29, falls down along the guide tube 29, and flows into the liquid storage tank 24 from its lower port. The operation is carried out in sequence, and the same operation is performed on each push rod 23 on the fixed plate 2, thereby realizing that the sample liquids in multiple sampling tubes 26 are respectively transported to the corresponding liquid storage tanks 24, thereby realizing the sampling work.

[0026] The turntable 19 is rotatably connected to the positioning column 30 via a rotating shaft, and the lower end of the turntable 19 is fixedly connected to the output end of the drive motor 14. Therefore, when the drive motor 14 drives the turntable 19 to rotate, due to the action of the rotating shaft, the fixed disk 2 and the sampling tube 26 do not rotate therewith, and the outer edge of the turntable 19 extends to the inner side of the detection table 21, so that one of the liquid storage tanks 24 on the upper surface of the turntable 19 is just on the detection table 21. Therefore, after the above-mentioned sample liquids are respectively transported to the liquid storage tanks 24, the detector 20 is controlled to work through the control panel 8, and the detector 20 will detect the sample liquid in one of the liquid storage tanks 24 located inside it through the detection table 21. The test is carried out and the test result is displayed on the display screen 7. When the test of the sample liquid in the liquid storage tank 24 located in the test platform 21 is completed, the control panel 8 controls the drive motor 14 to work, and the drive motor 14 drives the turntable 19 to rotate, so that the first liquid storage tank 24 located on the inner side of the test platform 21 on the turntable 19 is moved out, and the second liquid storage tank 24 on its surface is moved to the position of the first liquid storage tank 24. Then, the sample liquid in the second liquid storage tank 24 is tested and processed by the detector 20, and sorted in sequence, thereby realizing the detection and processing of the antibiotics contained in multiple groups of sample liquids, and the results are displayed on the display screen 7. The operation is simple.

[0027] The working principle of the present invention is as follows: when the present invention is working, the device is first moved to the wastewater site to be tested, and the fixed disk 2 is removed from the box body 1, so that the pharmaceutical industrial wastewater can be sampled separately using the multiple sampling tubes 26 on the fixed disk 2. After the sampling is completed, the fixed disk 2 is installed in the installation groove 10 and fixed by the positioning column 30 and the positioning sleeve 27. After the fixation is completed, the sample liquid in the sampling tube 26 is pushed out respectively and flows into the corresponding liquid storage tank 24 through the guide tube 29. Then, the detector 20 is turned on to detect the sample liquid in the liquid storage tank 24 inside the detection table 21. After the sample liquid in the first liquid storage tank 24 is detected, the turntable 19 is driven to rotate by controlling the drive motor 14. The second liquid storage tank 24 on its surface can be moved to the inside of the detection table 21 to facilitate the detection of the second liquid storage tank 24. By operating in sequence, the detection of multiple groups of sample liquids can be quickly realized, and the detection results will be displayed on the display screen 7. After the detection is completed, the fixed plate 15 can be pulled out of the box body 1 to facilitate the exposure of the liquid storage tank 24 on the turntable 19 to the box body 1, and then the liquid storage tank 24 can be cleaned with the water gun 12 to remove the residual wastewater sample inside it and improve its internal cleanliness. At the same time, the fixed disk 2 and the sampling tube 26 can also be taken out for cleaning. After cleaning, the turntable 19 is reset and fixed with the positioning screw 17 in conjunction with the positioning hole 16. At the same time, the fixed disk 2 is also reset to facilitate the detection operation again.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0029] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A device for detecting antibiotics in pharmaceutical industrial wastewater, comprising a housing (1), characterized in that: A water tank (3) is provided on one side of the upper end of the box body (1), and a fixed plate (2) is installed on the upper end of the box body (1) at one side of the water tank (3); a mounting groove (10) is provided on the upper surface of the box body (1) corresponding to the fixed plate (2); a fixing rod (22) is provided in the middle of the upper surface of the fixed plate (2); a control panel (8) is provided on the other side of the upper end of the box body (1); a display screen (7) is provided on the upper surface of the control panel (8); a turntable (19) is provided inside the box body (1) directly below the fixed plate (2); a detector (20) is provided inside the box body (1) at one side of the turntable (19); a U-shaped detection table (21) is provided on one side of the detector (20) corresponding to the turntable (19); a water gun (1) is provided inside the box body (1) at the other side of the turntable (19); 2), a battery box (13) is arranged at the rear side of the water gun (12), a driving motor (14) is connected to the middle of the lower surface of the rotating disk (19), a fixing plate (15) is installed at the bottom of the driving motor (14), a positioning screw (17) penetrates one side of the upper surface of the fixing plate (15), a slide groove (18) is provided at the inner bottom end of the box body (1) corresponding to the lower surface of the fixing plate (15), and a plurality of positioning holes (16) are provided at equal distances at the inner bottom end of the box body (1) corresponding to the positioning screw (17), a plurality of push rods (23) are distributed in an annular shape on the surface of the fixing plate (22) on the outer side of the fixing rod (22), one end of the push rod (23) is connected to a piston (25), a sampling tube (26) is sleeved on the outer side of the piston (25), and a sampling port (28) is provided at the lower end of the sampling tube (26); There are two fixed disks (2) in total, and the two fixed disks (2) are connected via a fixed rod (22). The sampling tube (26) is fixedly connected to the fixed disk (2). An opening is provided on the upper surface of the fixed disk (2) corresponding to the push rod (23). One end of the push rod (23) passes through the fixed disk (2) through the opening and extends to the interior of the sampling tube (26) and is connected to the piston (25). The outer diameter of the piston (25) matches the inner diameter of the sampling tube (26), and the piston (25) is made of rubber. A pull ring is provided at the top end of the fixing rod (22); the outer diameter of the fixing disk (2) is matched with the inner diameter of the mounting groove (10); a positioning sleeve (27) is provided at the middle of the lower surface of the bottommost fixing disk (2); a second magnetic sheet is provided at the inner top end of the positioning sleeve (27); a positioning column (30) is installed at the middle of the upper surface of the rotating disk (19) corresponding to the positioning sleeve (27); a first magnetic sheet (31) is provided at the upper surface of the positioning column (30) corresponding to the second magnetic sheet; and the opposing surfaces of the first magnetic sheet (31) and the second magnetic sheet have opposite magnetic properties; A rotating shaft is provided at the lower end of the positioning column (30), and a plurality of flow guide tubes (29) are provided in an annular shape on the outer side surface of the rotating shaft corresponding to the sample outlet (28), and a plurality of liquid storage tanks (24) are provided around the upper surface of the rotating disk (19) corresponding to the lower end of the flow guide tube (29), wherein the flow guide tube (29) is a conical hollow structure, and the upper end of the flow guide tube (29) corresponds to the lower end of the sample outlet (28), and the lower end of the flow guide tube (29) is located on one side of the interior of the liquid storage tank (24); The rotating disk (19) is rotatably connected to the positioning column (30) via a rotating shaft, and the lower end of the rotating disk (19) is fixedly connected to the output end of the driving motor (14). The outer side of the rotating disk (19) extends to the inner side of the detection table (21).

2. The device for detecting antibiotics in pharmaceutical industrial wastewater according to claim 1, characterized in that: The four corners at the lower end of the box body (1) are all provided with movable wheels (9), and one side of the box body (1) is rotatably connected to a box door (6), and the other side of the box body (1) is provided with a handrail (5) near the water tank (3), and the upper surface of the water tank (3) is provided with a water inlet (4).

3. The device for detecting antibiotics in pharmaceutical industrial wastewater according to claim 1, characterized in that: The upper end of the water gun (12) is connected to a connecting rope (11), and a water pipe is provided between the water gun (12) and the water tank (3). A water pump is provided inside the water tank (3), and the output end of the water pump is connected to one end of the water pipe, and the other end of the water pipe is connected to the water gun (12). The water gun (12) is connected to the tank (1) via the connecting rope (11).

4. The device for detecting antibiotics in pharmaceutical industrial wastewater according to claim 1, characterized in that: A slider (32) is provided on the lower surface of the fixing plate (15) at a position corresponding to the slide groove (18), and a threaded hole (33) is provided on the upper surface of the fixing plate (15) at a position corresponding to the positioning screw (17). The fixing plate (15) is slidably connected to the box body (1) via the slide groove (18) and the slider (32), and one end of the positioning screw (17) passes through the threaded hole (33) and is threadedly connected to the positioning hole (16).

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