Classification equipment for wear-resistant steel ball machining

Abstract

The utility model discloses sorting equipment for wear-resistant steel ball processing, which comprises an equipment box, two sides of the equipment box are respectively provided with a pipe groove I and a pipe groove II, an inclined sorting rod is arranged between the pipe groove I and the pipe groove II in a penetrating manner, two ends of the inclined sorting rod are connected with spring rods, and two sides of the outer part of the equipment box are symmetrically and fixedly connected with an L-shaped adjusting plate I and an L-shaped adjusting plate II; a square sliding groove and a bolt groove are formed in one side of the first L-shaped adjusting plate in parallel, a spacing mark is arranged at the position, located on the top of the bolt groove, of one side of the first L-shaped adjusting plate in parallel, a square sliding block is slidably connected into the square sliding groove, an arch-shaped piece is fixedly connected to one side of the square sliding block, and an inserting rod is fixedly connected into the arch-shaped piece. The two sets of inclined classification rods incline towards the same end at a certain acute included angle to form a structure for screening and classifying the wear-resistant steel balls, the distance between the two ends of the two sets of inclined classification rods is adjusted by adjusting the positions of the two sets of square sliding blocks at each end in the square sliding groove, and the wear-resistant steel ball classification requirements of different specifications and standards are met.

Description

Technical Field

[0001] This utility model relates to the technical field of steel ball sorting equipment, specifically a sorting device for processing wear-resistant steel balls. Background Technology

[0002] Classification equipment for wear-resistant steel ball processing is mainly used to grade, screen, and classify steel balls to ensure that the steel balls meet the specifications. This type of equipment is commonly used in industries such as mining, cement, and power to screen steel balls of different sizes to meet different grinding needs.

[0003] Existing Chinese patent document CN218890812U discloses a wear-resistant steel ball sorting device, including a sorting box. A feed pipe is fixed to the left end of the upper surface of the sorting box. A sorting mechanism is provided on the sorting box, and a material handling mechanism is provided inside the sorting box. The sorting mechanism includes a mounting plate fixed to the bottom right end of the sorting box. A motor is fixed to the upper surface of the mounting plate. A turntable is fixed to the output shaft of the motor. A connecting rod is rotatably connected to the front end of the turntable away from the center. A toothed plate is hinged to the end of the connecting rod away from the turntable. A gear is meshed on the front side of the toothed plate. A first slider is fixed to the left end of the toothed plate. This wear-resistant steel ball sorting device uses a sorting mechanism on the sorting box and multiple sorting nets to simultaneously sort multiple steel balls of various specifications. During sorting, it uses tilting and back-and-forth swinging to speed up the sorting process. A material handling mechanism is also included inside the sorting box for easy removal of the sorted steel balls. However, this wear-resistant steel ball processing sorting equipment still has shortcomings: it uses several sets of tilted sorting nets for steel ball sorting, but the actual sorting capacity of the nets is limited. Adding more sorting nets is necessary to meet the need for sorting more specifications of steel balls, but this process is time-consuming and labor-intensive, and the sorting accuracy is limited. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that the above-mentioned classification equipment for processing wear-resistant steel balls uses several sets of inclined sorting nets to classify steel balls, but the sorting nets have limited sorting specifications in the actual classification process. In addition to the sorting nets, more specifications of steel balls can be sorted, but the process of adding sorting nets is time-consuming and labor-intensive, and the sorting accuracy is limited. Therefore, this utility model provides a classification equipment for processing wear-resistant steel balls.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sorting device for processing wear-resistant steel balls, comprising: a device box, on which a first pipe groove and a second pipe groove are respectively opened on both sides, an inclined sorting rod is inserted between the first pipe groove and the second pipe groove, and spring rods are connected to both ends of the inclined sorting rod; an L-shaped adjusting plate and an L-shaped adjusting plate are symmetrically fixed to the outside of the device box; a square sliding groove and a bolt groove are parallel to each other on one side of the L-shaped adjusting plate; a spacing mark is parallel to the top of the bolt groove on one side of the L-shaped adjusting plate; a square slider is slidably connected inside the square sliding groove; an arc-shaped component is fixed to one side of the square slider; an insert rod is fixed inside the arc-shaped component; a connecting piece is fixed to the top of one side of the square slider; a hexagonal bolt structure is inserted inside the connecting piece; a hexagonal limiting frame is fixed to one end of the inner side of the L-shaped adjusting plate; and a spacing pointer is fixed to the top of the connecting piece.

[0006] As a further embodiment of this utility model: symmetrical measuring component grooves are provided on both sides of the top of the equipment box. Measuring component sliders are slidably connected inside both sets of measuring component grooves. Connecting plates and connecting rods are fixedly connected parallel to each other on the inner sides of both sets of measuring component sliders. Measuring grooves are provided on the connecting plates. Measuring marks are provided on the top surface of the connecting plates parallel to the measuring grooves. Sliding sleeves are fitted on the connecting rods. Measuring sliders are fixedly connected to the top of the sliding sleeves. Measuring pointers are fixedly connected to one top end of the measuring sliders. Contact rods are hinged to the bottom end of the sliding sleeves.

[0007] As a further embodiment of this utility model: a feeding box is slidably connected to the top of the equipment box, symmetrical material box grooves are opened on both sides of the outside of the equipment box, material box slide bars are symmetrically fixed to both ends of the bottom of the feeding box, and a discharge pipe is connected through the center of the bottom end of the feeding box.

[0008] As a further improvement of this utility model: a side groove is provided at the bottom of one side of the equipment box, and several sets of receiving boxes are provided at the bottom of the equipment box.

[0009] As a further embodiment of this utility model: two sets of inclined sorting rods are inserted between the first and second pipe grooves, and spring rods are connected to both ends of the two sets of inclined sorting rods. The four sets of spring rods are all hinged inside the bow-shaped component through inserted rods. The four sets of hexagonal bolt structures include bolt bodies with hexagonal end caps and hexagonal nut structures. The hexagonal end caps are engaged in the hexagonal limiting frame so that the bolt bodies are relatively fixed at an angle relative to the first L-shaped adjusting plate, allowing the hexagonal nut to be rotatably screwed and fixed. The second L-shaped adjusting plate is provided with the same number and specifications of connecting structures as the first L-shaped adjusting plate, and the two sets of structures are arranged diagonally.

[0010] As a further embodiment of this utility model: the connecting plate and the connecting rod and their connecting structure are all located inside the equipment box and move in parallel through the sliding connection of two sets of measuring component sliders in the measuring component groove. The sliding sleeve and its connecting structure are provided in two sets, symmetrically arranged on the connecting rod. The measuring sliders fixed to the top of the two sets of sliding sleeves are T-shaped and engaged inside the measuring groove. The two sets of measuring pointers are fixed to the top of the measuring sliders and are located on the top surface of the connecting plate, and are both facing the measuring pointer direction.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. In this utility model, two sets of inclined sorting rods are inclined at a certain acute angle toward the same end to form a structure for screening and sorting wear-resistant steel balls. The spring rods at both ends of the two sets of inclined sorting rods are hinged to one side of the square slider through the insert rod and the bow-shaped part. This makes it easy to adjust the distance between the two ends of the two sets of inclined sorting rods by adjusting the position of the two sets of square sliders inside the square slide groove. This adapts to the classification requirements of wear-resistant steel balls of different specifications and standards. Moreover, this structure has a large adjustment range of classification standards and high classification accuracy.

[0013] 2. Inside the equipment box, a connecting plate and a connecting rod move parallel to each other via a measuring component slide groove and a measuring component slider. Two sets of sliding sleeves are fitted onto the connecting rods, and two sets of contact rods, hinged at the bottom, respectively press against the inner sides of the two sets of inclined sorting rods to measure the distance at that point. The distance data is the diameter data of the wear-resistant steel ball that can pass through at that point. It is the sum of the readings of the two sets of measuring pointers pointing to the measuring targets plus the distance between the two sets of measuring targets. Through the above structure, the symmetry of the distances at various points of the two sets of inclined sorting rods can be easily and quickly calculated and corrected, which facilitates symmetrical calibration and improves the accuracy of steel ball sorting. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a sorting device for processing wear-resistant steel balls according to the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of the L-shaped adjusting plate in the sorting equipment for processing wear-resistant steel balls described in this utility model;

[0016] Figure 3 This is a schematic diagram of the inclined sorting rod in a sorting device for processing wear-resistant steel balls according to the present invention;

[0017] Figure 4 This is a structural schematic diagram of section A in the classification equipment for processing wear-resistant steel balls described in this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the L-shaped adjusting plate II in the sorting equipment for processing wear-resistant steel balls described in this utility model;

[0019] Figure 6 This is a schematic diagram of the connecting plate in a sorting device for processing wear-resistant steel balls according to the present invention;

[0020] Figure 7 This is a schematic diagram of the contact rod in a sorting device for processing wear-resistant steel balls according to the present invention;

[0021] Figure 8 This is a schematic diagram of the receiving box in a sorting device for processing wear-resistant steel balls according to the present invention;

[0022] Figure 9 This is a schematic diagram of the feed box in a sorting device for processing wear-resistant steel balls, as described in this utility model.

[0023] In the diagram: 1. Equipment box; 2. Pipe groove one; 3. Pipe groove two; 4. Inclined sorting rod; 5. Spring rod; 6. L-shaped adjusting plate one; 7. Square slide groove; 8. Bolt groove; 9. Spacing mark; 10. Square slider; 11. Bow-shaped component; 12. Insert rod; 13. Connecting piece; 14. Hexagonal bolt structure; 15. Spacing pointer; 16. L-shaped adjusting plate two; 17. Measuring component slide groove; 18. Measuring component slider; 19. Connecting plate; 20. Measuring slide groove; 21. Measuring mark; 22. Connecting rod; 23. Sliding sleeve; 24. Measuring slider; 25. Measuring pointer; 26. Contact rod; 27. Feed box; 28. Feed box slide groove; 29. ​​Feed box slide bar; 30. Discharge pipe; 31. Side groove; 32. Receiving box; 33. Hexagonal limit frame. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will be described below based on its overall structure.

[0026] Reference Figures 2 to 4 In this embodiment of the utility model, a sorting device for processing wear-resistant steel balls includes: a device box 1, with a pipe groove 2 and a pipe groove 3 respectively opened on both sides of the device box 1, an inclined sorting rod 4 passing through the pipe groove 2 and the pipe groove 3, and spring rods 5 connected to both ends of the inclined sorting rod 4; L-shaped adjusting plates 1 and 2 are symmetrically fixed to the outside of the device box 1; a square sliding groove 7 and a bolt groove 8 are opened parallel to one side of the L-shaped adjusting plate 1; a spacing mark 9 is set parallel to the top of the bolt groove 8 on one side of the L-shaped adjusting plate 1; a square slider 10 is slidably connected inside the square sliding groove 7; an arc-shaped part 11 is fixed to one side of the square slider 10; an insert rod 12 is fixed inside the arc-shaped part 11; a connecting piece 13 is fixed to the top of one side of the square slider 10; a hexagonal bolt structure 14 passes through the connecting piece 13; a hexagonal limiting frame 33 is fixed to one end of the inner side of the L-shaped adjusting plate 16; and a spacing pointer 15 is fixed to the top of the connecting piece 13.

[0027] Reference Figures 2 to 4 Two sets of inclined sorting rods 4 are inserted between the first and second pipe grooves 2 and 3. Both ends of the two sets of inclined sorting rods 4 are connected to spring rods 5. All four sets of spring rods 5 are inserted through the inserted rods 12 and hinged inside the bow-shaped part 11. The four sets of hexagonal bolt structures 14 include bolt bodies with hexagonal end caps and hexagonal nut structures. The hexagonal end caps are engaged in the hexagonal limiting frame 33 so that the bolt bodies are relatively fixed at an angle relative to the L-shaped adjusting plate 16 so that the hexagonal nut can be rotated and screwed in. The L-shaped adjusting plate 2 16 is provided with the same number and specifications of connecting structures as the L-shaped adjusting plate 16, and the two sets of structures are arranged diagonally.

[0028] The above scheme is adopted: two sets of inclined sorting rods 4 are inclined at a certain acute angle toward the same end to form a structure for screening and sorting wear-resistant steel balls. The spring rods 5 at both ends of the two sets of inclined sorting rods 4 are hinged to one side of the square slider 10 through the insert rod 12 and the bow-shaped part 11. This allows for adjustment of the distance between the two ends of the two sets of inclined sorting rods 4 by adjusting the position of the two sets of square sliders 10 inside the square slide groove 7. This adapts to the classification requirements of wear-resistant steel balls of different specifications and standards. Moreover, this structure has a large adjustment range of classification standards and high classification accuracy. In order to ensure that the two sets of square sliders 10 at the same end move the same distance, the distance pointer 15 and the distance mark 9 can be observed to indicate the same scale to ensure that the two sets of inclined sorting rods 4 are set in a completely symmetrical manner inside the equipment box 1. The position of the square slider 10 is fixed by a hexagonal bolt structure 14 through the bolt groove 8 and the connecting piece 13 and then screwed together. The hexagonal bolt cap in the hexagonal bolt structure 14 is engaged in the hexagonal limit frame 33 to restrict the bolt body from rotating. The hexagonal nut is used to achieve the function of screwing and fixing.

[0029] Reference Figures 5 to 7 The equipment box 1 has symmetrical measuring slide grooves 17 on both sides of its top. Measuring sliders 18 are slidably connected inside each of the two sets of measuring slide grooves 17. Connecting plates 19 and connecting rods 22 are fixedly connected parallel to each other on the inner sides of the two sets of measuring sliders 18. The connecting plate 19 has a measuring slide groove 20. A measuring mark 21 is set on the top surface of the connecting plate 19 parallel to the measuring slide groove 20. A sliding sleeve 23 is fitted onto the connecting rod 22. A measuring slider 24 is fixedly connected to the top of the sliding sleeve 23. A measuring pointer 25 is fixedly connected to one end of the top of the measuring slider 24. A contact length is hinged to the bottom end of the sliding sleeve 23. Rod 26, connecting plate 19 and connecting rod 22 and their connecting structures are all slidably connected within measuring component slide groove 17 by two sets of measuring component sliders 18 and are located inside the equipment box 1 to achieve parallel movement. There are two sets of sliding sleeves 23 and their connecting structures, which are symmetrically arranged on the connecting rod 22. The measuring sliders 24 fixed to the top of the two sets of sliding sleeves 23 are T-shaped and locked inside the measuring slide groove 20. The two sets of measuring pointers 25 are fixed to the top of the measuring sliders 24 and are located on the top surface of the connecting plate 19, and are both facing the measuring mark 21.

[0030] The above scheme is adopted: Inside the equipment box 1, a connecting plate 19 and a connecting rod 22 move in parallel through the measuring component slide groove 17 and the measuring component slider 18. Two sets of sliding sleeves 23 are sleeved on the connecting rod 22. Two sets of contact rods 26, which are hinged at the bottom, respectively press against the inner side of the two sets of inclined classification rods 4 to measure the distance at that point. The distance data is the diameter data of the wear-resistant steel ball that can pass through at that point. It is the sum of the indications of the two sets of measuring pointers 25 pointing to the measuring mark 21 plus the distance between the two sets of measuring marks 21. Through the above structure, the symmetry of the distances at various points of the two sets of inclined classification rods 4 can be easily and quickly calculated and corrected, which facilitates symmetrical calibration and improves the accuracy of steel ball classification.

[0031] Reference Figure 9 The top of the equipment box 1 is slidably connected to the feed box 27. The two sides of the outside of the equipment box 1 are symmetrically provided with feed box grooves 28. The bottom ends of the feed box 27 are symmetrically fixed with feed box slide bars 29. The bottom center of the feed box 27 is connected to the discharge pipe 30.

[0032] The above scheme is adopted: the feed box 27 is slidably connected to the top of the equipment box 1 through the feed box slide 28 and the feed box slide 29, which facilitates the flexible movement of the feed box 27 to meet various maintenance or calculation needs. The discharge pipe 30 at the bottom of the feed box 27 is used to discharge steel ball material.

[0033] Reference Figure 8 A side groove 31 is provided at the bottom of one side of the equipment box 1, and several sets of receiving boxes 32 are provided at the bottom of the equipment box 1.

[0034] Using the above scheme: Several sets of receiving boxes 32 are arranged in parallel at the bottom of the equipment box 1. The receiving boxes 32 can be flexibly picked up and put in from one side of the side groove 31, and the spacing is adjustable, so as to receive the screened wear-resistant steel balls according to their size.

[0035] The working principle of this utility model is as follows: In use, two sets of inclined sorting rods 4 are inclined at a certain acute angle towards the same end to form a structure for screening and sorting wear-resistant steel balls. The spring rods 5 at both ends of the two sets of inclined sorting rods 4 are hinged to one side of the square slider 10 through the insert rod 12 and the bow-shaped part 11. This allows for adjustment of the distance between the two ends of the two sets of inclined sorting rods 4 by adjusting the position of the two sets of square sliders 10 inside the square slide groove 7. This adapts to the classification needs of wear-resistant steel balls of different specifications and standards. Moreover, this structure has a large range of adjustment for classification standards. To ensure high precision, the two sets of square sliders 10 at the same end move the same distance. This can be achieved by observing that the spacing pointer 15 and the spacing mark 9 indicate the same scale, ensuring that the two sets of inclined sorting rods 4 are perfectly symmetrically positioned inside the equipment box 1. The position of the square sliders 10 is fixed by a hexagonal bolt structure 14 through bolt slots 8 and connecting pieces 13, and then screwed together. The hexagonal bolt caps in the hexagonal bolt structure 14 engage with the hexagonal limiting frame 33 to prevent the bolt body from rotating, and are tightened and fixed with hexagonal nuts. Inside the equipment box 1, a connecting plate 19 and a connecting rod 22 move parallel to each other via a measuring component slide groove 17 and a measuring component slider 18. Two sets of sliding sleeves 23 are fitted onto the connecting rod 22, and two sets of contact rods 26, hinged at their bottom ends, respectively press against the inner sides of two sets of inclined classification rods 4 to measure the distance at that point. The distance data is the diameter data of the wear-resistant steel ball that can pass through at that point. It is the sum of the readings of the two sets of measuring pointers 25 pointing to the measuring mark 21 plus the distance between the two sets of measuring marks 21. Through the above structure, the two sets of inclined classification rods 4 can be conveniently and quickly calculated and corrected. The spacing of the sorting rods 4 is symmetrical, which facilitates symmetrical calibration and improves the sorting accuracy of steel balls. The feeding box 27 is slidably connected to the top of the equipment box 1 through the material box slide 28 and the material box slide bar 29, which facilitates flexible movement of the feeding box 27 to meet various maintenance or calculation needs. The discharge pipe 30 at the bottom of the feeding box 27 is used to discharge steel ball material. Several sets of receiving boxes 32 are arranged in parallel at the bottom of the equipment box 1. The receiving boxes 32 can be flexibly picked up and put in from one side of the side groove 31, and the spacing is adjustable, which facilitates receiving the screened wear-resistant steel balls according to the size of the sorting.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sorting apparatus for processing of wear-resistant steel balls, characterized by Include: The device box (1), the pipe groove one (2) and the pipe groove two (3) are respectively set up on the both sides of the device box (1), the pipe groove one (2) and the pipe groove two (3) are set up between the inclined classification rod (4), the both ends of the inclined classification rod (4) are connected with spring rod (5), the both sides of the device box (1) are symmetrically fixed with L type adjusting plate one (6) and L type adjusting plate two (16) outside, the L type adjusting plate one (6) parallelly set up with square block sliding slot (7) and bolt groove (8) on one side, the L type adjusting plate one (6) parallelly set up with interval mark (9) on one side at the top of bolt groove (8), the square block sliding slot (7) is slidably connected with square sliding block (10) inside, the square sliding block (10) is fixed with arcuate piece (11) on one side, the arcuate piece (11) is fixed with plug rod (12) inside, the square sliding block (10) is fixed with connecting piece (13) on one side top, the connecting piece (13) is internally threaded with hexagonal bolt structure (14), the L type adjusting plate one (6) is fixed with hexagonal limit frame (33) on one end inside, the connecting piece (13) is fixed with interval pointer (15) on top.

2. A sorting apparatus for processing of wear-resistant steel balls according to claim 1, characterized in that, The device box (1) top two sides symmetrically set up measuring piece sliding slot (17), two groups measuring piece sliding slot (17) are slidably connected with measuring piece sliding block (18) inside, two groups measuring piece sliding block (18) are parallelly fixed with connecting plate (19) and connecting rod (22) inside, the connecting plate (19) is provided with measuring sliding slot (20), the connecting plate (19) is provided with measuring mark (21) on top surface parallel to measuring sliding slot (20), the connecting rod (22) is sleeved with sliding sleeve (23), the sliding sleeve (23) is fixed with measuring sliding block (24) on top, the measuring sliding block (24) is fixed with measuring pointer (25) on top end, the sliding sleeve (23) is hinged with contact long rod (26) on bottom end.

3. A sorting apparatus for processing of wear-resistant steel balls according to claim 1, characterized in that, The device box (1) top end is slidably connected with feeding box (27), the device box (1) is symmetrically set up with material box sliding slot (28) on both sides outside, the feeding box (27) is symmetrically fixed with material box sliding strip (29) on both ends bottom, the feeding box (27) is centrally connected with discharge pipe (30) on bottom end.

4. A sorting apparatus for processing of wear-resistant steel balls according to claim 1, characterized in that, The device box (1) one side bottom end is set up with side groove (31), the device box (1) is provided with a plurality of groups of material collecting box (32) in the bottom.

5. A sorting apparatus for processing of wear-resistant steel balls according to claim 1, characterized in that, The pipe groove one (2) and the pipe groove two (3) are set up between two groups of inclined classification rod (4), the both ends of two groups of inclined classification rod (4) are connected with spring rod (5), four groups of spring rod (5) are hinged in the arcuate piece (11) inside through the plug rod (12), four groups of hexagonal bolt structure (14) include bolt body and hexagonal nut structure of hexagonal end cap, and the hexagonal end cap part is engaged in the hexagonal limit frame (33) to make the bolt body relative to the L type adjusting plate one (6) angle relative fixed for the hexagonal nut part rotatable screw fixed, the L type adjusting plate two (16) is provided with the same number of specifications of connecting structure as the L type adjusting plate one (6), and two groups of structures are diagonally arranged.

6. A sorting apparatus for processing of wear-resistant steel balls according to claim 2, characterized in that, The connecting plate (19), the connecting rod (22) and the connecting structure thereof are connected in sliding mode by two groups of measuring member sliding blocks (18) in the measuring member sliding groove (17) to realize parallel movement inside the equipment box (1), the sliding sleeve (23) and the connecting structure thereof are provided with two groups, which are symmetrically arranged on the connecting rod (22), the measuring sliding blocks (24) fixed at the top ends of the two groups of sliding sleeves (23) are provided in T-shaped structure and are clamped in the measuring sliding groove (20), and the two groups of measuring pointers (25) fixed at the top ends of the measuring sliding blocks (24) are arranged on the top surface of the connecting plate (19) and are arranged towards the measuring scale (21).

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