A wheel ultrasonic flaw detector wheel rotation monitoring device

Abstract

The present application relates to a wheel ultrasonic flaw detector device, specifically, the present application relates to a kind of wheel ultrasonic flaw detector wheel rotation monitoring device, including workbench (1);The workbench (1) is equipped with carrier roller (2);Adjacent the carrier roller (2) between being equipped with monitoring component;The monitoring component includes main shaft structure;The main shaft structure is respectively connected with gyro wheel (3) and encoder (4);The carrier roller (2) is equipped with wheel (201);The wheel (201) is in contact with the gyro wheel (3);Monitoring component is installed in the lower position of the center of two carrier rollers of workbench;Carrier roller rotates, carrier roller rotates by friction force to drive wheel to rotate and carry out flaw detection, wheel rotates by friction force to drive gyro wheel, gyro wheel drives main shaft structure to rotate, and main shaft structure drives encoder to rotate;Contrast the encoder of main shaft structure with the numerical value of carrier roller self-encoder, the numerical value of both deviates more than certain range, and it is followed by error alarm.

Description

Technical Field

[0001] This invention relates to wheel ultrasonic flaw detector equipment, and more specifically, to a wheel rotation monitoring device for a wheel ultrasonic flaw detector. Background Technology

[0002] As a key component in railway transportation, the quality of wheels determines the stability and safety of train operation. After processing, wheels must undergo a series of quality inspections before being put into use, including static balance, hardness, ultrasonic testing, magnetic detection, surface strengthening, appearance and dimensional inspection, etc. Among these, ultrasonic testing, as a means of inspecting internal defects in wheels, is a crucial step in ensuring wheel quality. Currently, the ultrasonic testing process of wheels using a through-type wheel ultrasonic flaw detector is roughly as follows: the wheel is transferred from a horizontal to a vertical position by a flipping machine, enters the waiting position of the ultrasonic flaw detector via the track, the main frame of the ultrasonic flaw detector lowers and clamps the wheel, causing the wheel to roll to the testing position, the radial frame of the ultrasonic flaw detector extends into position and lowers to clamp the wheel, the main frame of the ultrasonic flaw detector rises and retracts to the waiting position. In the ultrasonic flaw detector, the worktable rises, and a spinning mechanism on the worktable lifts the wheel to a position away from the track. Each flaw detection probe is attached to its respective flaw detection position on the wheel. A hydraulic motor drives two rollers on the spinning mechanism to rotate via sprockets and chains. The rollers, through friction, drive the wheel to rotate for flaw detection. An encoder is installed on the roller shaft of one of the rollers in the spinning mechanism. Since the two rollers of the spinning mechanism are driven simultaneously by a hydraulic motor via a chain, the encoder can only detect whether the spinning mechanism is rotating, but cannot detect whether the wheel is rotating on the spinning mechanism. This results in the ultrasonic flaw detector not alarming and continuing flaw detection when the wheel slips or stops on the spinning mechanism, which can easily lead to missed detection accidents where wheel defects are not fully detected, and product quality cannot be guaranteed.

[0003] The applicant discovered through a search that Chinese patent document with publication number 206177898U, published on May 17, 2017, discloses an ultrasonic phased array automatic flaw detection device for train wheels. This device includes a bracket, a wheel rotation drive platform, a probe lifting mechanism, a probe horizontal adjustment mechanism, a phased array probe, a water tank, and an encoder. The wheel rotation drive platform is horizontally positioned within the water tank, and the wheel to be inspected is coaxially mounted on the platform. The platform is driven to rotate by a motor reducer. A pressure plate device is provided on the platform to secure the wheel. The phased array probe is connected to the probe lifting mechanism and the probe horizontal adjustment mechanism, allowing the probe to be adjusted laterally and longitudinally to fit against the inspected surface of the wheel. However, this device also fails to solve the aforementioned technical problem.

[0004] Therefore, in order to improve or solve at least one of the above problems, it is necessary to provide a wheel rotation monitoring device for an ultrasonic wheel flaw detector that can monitor in real time whether the wheel slips or stops during ultrasonic wheel flaw detection. Summary of the Invention

[0005] The purpose of this invention is to provide a wheel rotation monitoring device for an ultrasonic wheel flaw detector that can monitor in real time whether the wheel slips or stops during ultrasonic wheel flaw detection.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a wheel rotation monitoring device for an ultrasonic flaw detector, comprising a worktable; a roller is provided on the worktable; a monitoring component is provided between adjacent rollers; the monitoring component includes a main shaft structure; a roller and an encoder are respectively connected to the main shaft structure; a wheel is provided on the roller; the wheel abuts against the roller.

[0007] The spindle structure includes a spindle; a spindle support is provided on the spindle; one end of the spindle is connected to the roller; and the other end of the spindle is connected to the encoder.

[0008] The main shaft support has bearings at both ends; the main shaft is housed in the main shaft support and connected to the bearings; the main shaft has a first shaft segment and a second shaft segment at both ends; the first shaft segment has an end cap and is connected to a third shaft segment; the roller is connected to the third shaft segment; the main shaft support has an encoder support; the encoder support is connected to the encoder; and a coupling connects the encoder to the second shaft segment.

[0009] The end of the third shaft section is provided with a pressure cap; the pressure cap abuts against the roller; the end of the end cap is provided with a sealing ring mounting groove; a sealing ring is provided in the sealing ring mounting groove; the sealing ring is connected to the first shaft section.

[0010] The monitoring component includes a left cover and a right cover; a guide rail is provided in the right cover; a guide rail box is provided on the main shaft support; a sliding groove is provided on the guide rail box; and the guide rail is disposed in the sliding groove.

[0011] The right box cover is provided with a spring stop block; the spring stop block is provided with a spring mounting hole; the bottom of the right box cover is provided with a plug; the plug is located in the spring mounting hole; a spring is provided in the spring mounting hole; one end of the spring is pressed against the plug, and the other end of the spring is pressed against the guide rail box.

[0012] Both the left and right box covers are provided with mounting grooves and waterproof sealing strip mounting grooves; the end cover is located in the mounting groove, and a sealing gasket is connected to the end cover; a waterproof strip is provided in the waterproof sealing strip mounting groove; the waterproof strip is located between the sealing gasket and the left box cover; a waterproof plate is connected to the left box cover; the sealing gasket is located between the waterproof plate and the left box cover.

[0013] The bottom of the right box cover is provided with an encoder connector; the encoder connector is connected to the encoder; the bottom of the left box cover is provided with an air pipe connector; the air pipe connector is connected to the inside of the left box cover.

[0014] The right box cover is provided with a connecting plate; the connecting plate is connected to a base; the base is connected to a square tube; the workbench includes a crossbeam; the square tube is connected to the crossbeam.

[0015] The base has a first oblong hole; the square tube has a first bolt connected to the first oblong hole; the side of the base has a connecting groove; the connecting plate is disposed in the connecting groove, and the connecting plate has a second oblong hole; the second oblong hole has a second bolt connected to the base; the top of the base has a screw; the screw has a stop block; the stop block is connected to the connecting plate.

[0016] The beneficial effects of this application are as follows:

[0017] The monitoring component of this application is installed at the lower center of the two idler rollers on the workbench. The two idler rollers rotate, and the idler rollers drive the wheel to rotate through friction for flaw detection. The wheel drives the roller to rotate through friction, and the roller drives the main shaft structure to rotate. The main shaft structure drives the encoder to rotate. The encoder values ​​of the main shaft structure and the encoder built into the idler roller are compared. If the difference between the two values ​​exceeds a certain range, a following error alarm is generated. This is used to determine whether the wheel is rotating on the idler roller. It prevents the ultrasonic flaw detector from continuing to detect flaws without alarming when the wheel slips or stops on the idler roller, thus avoiding the occurrence of missed detection accidents where wheel defects are not completely detected, and ensuring product quality. Attached Figure Description

[0018] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0019] Figure 1 This is a schematic diagram of the wheel rotation monitoring device of the ultrasonic flaw detector for wheels.

[0020] Figure 2 This is a schematic diagram of the main shaft structure of the wheel rotation monitoring device of the ultrasonic flaw detector for wheels.

[0021] Figure 3 This is a cross-sectional view of the main shaft structure of the wheel rotation monitoring device of the ultrasonic flaw detector for this wheel.

[0022] Figure 4 This is a schematic diagram of the monitoring components of the wheel rotation monitoring device of the ultrasonic flaw detector for wheels.

[0023] Figure 5 This is an exploded view of the monitoring components of the wheel rotation monitoring device of this ultrasonic flaw detector.

[0024] Figure 6 This is a schematic diagram of the right cover of the wheel rotation monitoring device of the ultrasonic flaw detector for this wheel.

[0025] Figure 7 This is a schematic diagram of the left cover of the wheel rotation monitoring device of the ultrasonic flaw detector for this wheel.

[0026] Figure 8 This is a schematic diagram showing the installation status of the connecting plate of the wheel rotation monitoring device of the ultrasonic flaw detector for this wheel.

[0027] The markings in the above figures are all:

[0028] The diagram is marked as follows:

[0029] 1. Workbench

[0030] 2. Idler rollers, 201. Wheels,

[0031] 3. Rollers

[0032] 4. Encoder

[0033] 5. Spindle, 501. Spindle bracket, 502. Bearing,

[0034] 6. First shaft section; 601. Second shaft section; 602. Third shaft section; 603. End cover; 604. Encoder bracket; 605. Sealing ring; 606. Coupling; 607. Pressure cap; 608. Sealing ring mounting groove.

[0035] 7. Left box cover; 701. Right box cover; 702. Guide rail; 703. Guide rail box; 704. Slide groove.

[0036] 8. Spring stop block; 801. Spring mounting hole; 802. Plug; 803. Spring.

[0037] 9. Mounting slot; 901. Sealing gasket; 902. Waterproof membrane; 903. Waterproof sealing strip mounting slot; 904. Encoder connector; 905. Air pipe connector.

[0038] 10. Connecting plate; 101. Base; 102. Square tube; 103. Crossbeam; 104. First oblong hole; 105. Connecting groove; 106. Second oblong hole; 107. Screw; 108. Stop block. Detailed Implementation

[0039] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0040] Figure 1 The wheel rotation monitoring device of the ultrasonic flaw detector shown includes a worktable 1; a roller 2 is provided on the worktable 1; a monitoring component is provided between adjacent rollers 2; the monitoring component includes a main shaft structure; a roller 3 and an encoder 4 are respectively connected to the main shaft structure; a wheel 201 is provided on the roller 2; the wheel 201 abuts against the roller 3.

[0041] The monitoring component is installed at the lower center of the two idler rollers 2 on the workbench 1. When the idler rollers 2 rotate, they drive the wheel 201 to rotate for flaw detection through friction. The wheel 201 drives the roller 3 to rotate through friction, which in turn drives the main shaft structure to rotate. The main shaft structure drives the encoder 4 to rotate. The encoder 4 on the main shaft structure is compared with the encoder value on the idler roller 2. If the difference between the two values ​​exceeds a certain range, a following error alarm is generated. This is used to determine whether the wheel 201 is rotating on the idler roller 2. This prevents the ultrasonic flaw detector from continuing to detect flaws without alarming when the wheel 201 slips or stops rotating on the idler roller 2, thus avoiding the occurrence of missed detection accidents where the wheel 201 defects are not completely detected, and ensuring product quality.

[0042] The spindle structure includes a spindle 5; a spindle support 501 is provided on the spindle 5; one end of the spindle 5 is connected to the roller 3; and the other end of the spindle 5 is connected to the encoder 4.

[0043] The main spindle support 501 is a square support; the main spindle support 501 has a through hole; the main spindle 5 is installed in the through hole; the roller 3 is fixedly connected to the main spindle 5; the rotation of the roller 3 can drive the main spindle 5 to rotate in the main spindle support 501; the rotation of the main spindle 5 can drive the encoder 4 to rotate.

[0044] Bearings 502 are provided at both ends of the main spindle support 501; the main spindle 5 is located in the main spindle support 501 and is connected to the bearings 502; a first shaft section 6 and a second shaft section 601 are provided at both ends of the main spindle 5; an end cover 603 is provided on the first shaft section 6 and a third shaft section 602 is connected to the first shaft section 6; a roller 3 is connected to the third shaft section 602; an encoder support 604 is provided on the main spindle support 501; the encoder support 604 is connected to the encoder 4; a coupling 606 is connected between the encoder 4 and the second shaft section 601.

[0045] A bearing 502 is fixedly connected in the spindle bracket 501; the bearing 502 is connected to both ends of the spindle bracket 501; the spindle 5 is installed in the spindle bracket 501, and both ends of the spindle 5 are connected to the bearing 502, so that the spindle 5 can rotate flexibly in the spindle bracket 501; the end cover 603 is fixedly connected to the first shaft section 6, and the end cover 603 abuts against the bearing 502, which can prevent the bearing 502 from coming off the spindle bracket 501; the encoder bracket 604 is fixedly connected to the spindle bracket 501; the encoder 4 is fixedly connected to the encoder bracket 604; the encoder 4 includes an input rod; the input rod is fixedly connected to the second shaft section 601 through a coupling 606; the encoder 4 is connected to a PLC.

[0046] The end of the third shaft section 602 is provided with a pressure cap 607; the pressure cap 607 abuts against the roller 3; the end of the end cover 603 is provided with a sealing ring mounting groove 608; a sealing ring 605 is provided in the sealing ring mounting groove 608; the sealing ring 605 is connected to the first shaft section 6.

[0047] The pressure cap 607 is fixedly connected to the end of the third shaft section 602 by screws; the roller 3 is sleeved on the third shaft section 602; one end of the roller 3 abuts against the first shaft section 6; the other end of the roller 3 abuts against the pressure cap 607; thus, the roller 3 can be fixedly connected on the third shaft section 602; the sealing ring 605 can seal the connection between the end cap 603 and the spindle 5, and can prevent ultra-probe fluid or dust from entering the spindle support 501 from the end cap 603.

[0048] The monitoring component includes a left cover 7 and a right cover 701; a guide rail 702 is provided in the right cover 701; a guide rail box 703 is provided on the main shaft support 501; a slide groove 704 is provided on the guide rail box 703; and the guide rail 702 is located in the slide groove 704.

[0049] The left cover 7 and the right cover 701 can be combined and fixedly connected to form a square box; the guide rail 702 is fixedly connected to the inner wall of the right cover 701 and is vertically arranged; the guide rail box 703 is fixedly connected to one side of the spindle support 501; the guide rail 702 is provided in the slide groove 704, so as to guide and limit the vertical movement of the spindle support 501.

[0050] A spring stop block 8 is provided in the right box cover 701; a spring mounting hole 801 is provided on the spring stop block 8; a plug 802 is provided at the bottom of the right box cover 701; the plug 802 is located in the spring mounting hole 801; a spring 803 is provided in the spring mounting hole 801; one end of the spring 803 is pressed against the plug 802, and the other end of the spring 803 is pressed against the guide rail box 703.

[0051] The spring stop 8 is located inside the right cover 701 and on the bottom plate of the right cover 701. The spring 803 can be installed and removed by removing the plug 802 from the spring mounting hole 801. The plug 802 and the spring mounting hole 801 cooperate to facilitate the replacement of the spring 803 and ensure the sealing of the internal space of the right cover 701. When the wheel 201 presses down on the roller 3, the main shaft support 501 moves down to press the spring 803. When the wheel 201 is removed from the roller 3, the spring 803 rebounds, which can reset the main shaft support 501.

[0052] Both the left and right box covers 7 and 701 are provided with mounting grooves 9 and waterproof sealing strip mounting grooves 903; end caps 603 are located in mounting grooves 9 and are connected to sealing gaskets 901; waterproof strips are provided in the waterproof sealing strip mounting grooves 903; waterproof strips are located between sealing gaskets 901 and left box covers 7; waterproof plates 902 are connected to left box covers 7; sealing gaskets 901 are located between waterproof plates 902 and left box covers 7.

[0053] The mounting grooves 9 on the left cover 7 and the right cover 701 can be combined to form an oblong groove; the roller 3 and the end cover 603 extend from the box through the mounting groove 9; and the roller 3 can move vertically through the mounting groove 9; the sealing gasket 901 has an elliptical cross section; the sealing gasket 901 has a through hole, and the sealing gasket 901 fits onto the end cover 603 and can completely cover the mounting groove 9, which can prevent the superconducting fluid from entering the box when the roller 3 moves up and down; the waterproof sealing strip mounting groove 903 is set along the edge of the mounting groove 9, and the waterproof strip abuts against the sealing gasket 901, which can enhance the sealing performance at the mounting groove 903; the waterproof plate 902 is fixedly connected to the left cover 7 and the right cover 701 by bolts; the waterproof plate 902 has a clearance groove on the side near the sealing gasket 901, and the waterproof plate 902 has a U-shaped through hole, which can avoid interfering with the up and down movement of the sealing gasket 901.

[0054] The bottom of the right cover 701 is provided with an encoder connector 904; the encoder connector 904 is connected to the encoder 4; the bottom of the left cover 7 is provided with an air pipe connector 905; the air pipe connector 905 is connected to the inside of the left cover 7.

[0055] The encoder connector 904 is a waterproof connector; the encoder connector 904 is installed at the bottom of the right cover 701 for easy installation of the encoder cable; the air pipe connector 905 is a waterproof connector; the air pipe connector 905 is installed at the bottom of the left cover 7, and compressed air enters the interior of the enclosure through the air pipe connector 905, making the interior of the enclosure full of positive pressure gas, further achieving dustproof and waterproof.

[0056] A connecting plate 10 is provided on the right box cover 701; the connecting plate 10 is connected to the base 101; the base 101 is connected to the square tube 102; the workbench 1 includes a crossbeam 103; the square tube 102 is connected to the crossbeam 103.

[0057] The connecting plate 10 is fixedly connected to the right box cover 701 and the base 101 respectively; the base 101 is fixedly connected to the crossbeam 103 of the workbench 1 through the square tube 102; thereby realizing the stable connection between the device and the workbench 1.

[0058] The base 101 has a first oblong hole 104; the square tube 102 has a first bolt, which is connected to the first oblong hole 104; the side of the base 101 has a connecting groove 105; the connecting plate 10 is located in the connecting groove 105, and the connecting plate 10 has a second oblong hole 106; the second oblong hole 106 has a second bolt, which is connected to the base 101; the top of the base 101 has a screw 107; the screw 107 has a stop block 108; the stop block 108 is connected to the connecting plate 10.

[0059] The square tube 102 is a hollow square tube; the square tube 102 is fixedly connected to the crossbeam 103; the first waist-shaped hole 104 is set horizontally; the first waist-shaped hole 104 can facilitate the adjustment of the installation position of the base 101 on the square tube 102; the second waist-shaped hole 106 is set vertically; the second waist-shaped hole 106 can facilitate the adjustment of the vertical position of the connecting plate 10 along the connecting groove 105; the stop block 108 is provided with a U-shaped hole; the stop block 108 is snapped onto the screw 107; the end of the stop block 108 is fixed to the connecting plate 10 by bolts; thereby achieving effective limiting of the connecting plate 10.

[0060] The specific workflow of this invention is as follows:

[0061] The monitoring component is located at the lower center of the two idler rollers 2; and the roller 3 is adjusted to a suitable position through the connecting plate 10 and the base 101 to ensure that the wheel 201 presses the roller 3 downward when it enters the ultrasonic flaw detector position, further compressing the spring 803 which already has a certain amount of pre-compression; the elastic force of the spring 803 makes the roller 3 fit tightly against the wheel rim of the wheel 201.

[0062] The worktable 1 rises, lifting the wheel 201 to the position away from the track. The hydraulic motor drives the roller 2 to rotate through the sprocket and chain. The roller 2 drives the wheel 201 to rotate for flaw detection through friction. The wheel 201 drives the roller 3 to rotate through friction. The roller 3 drives the main shaft 5 to rotate. The main shaft 5 drives the encoder 4 to rotate through the coupling 606.

[0063] By comparing the encoder values ​​of the main shaft structure encoder 4 and the idler roller's built-in encoder in the PLC program, a following error alarm is generated when the deviation between the two values ​​exceeds a certain range. This is used to determine whether the wheel 201 is rotating on the idler roller 2. This prevents the ultrasonic flaw detector from continuing to detect flaws without alarming when the wheel 201 slips or stops rotating on the idler roller 2, thus avoiding the occurrence of missed detection accidents where the defects of the wheel 201 are not completely detected, and ensuring product quality.

[0064] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A wheel rotation monitoring device for a wheel ultrasonic testing machine, characterized by: Including workbench (1), the workbench (1) is equipped with the supporting roller (2), the supporting roller (2) between adjacent is equipped with monitoring assembly, the monitoring assembly includes main shaft structure, the main shaft structure is connected with the gyro wheel (3) and encoder (4) respectively, the supporting roller (2) is equipped with the wheel (201), the wheel (201) with the gyro wheel (3) abuts, The main shaft structure includes main shaft (5), the main shaft (5) is equipped with main shaft support (501), one end of the main shaft (5) is connected with the gyro wheel (3), the other end of the main shaft (5) is connected with the encoder (4), the both ends of the main shaft support (501) are equipped with bearing (502), the main shaft (5) is located in the main shaft support (501), and the main shaft (5) is connected with the bearing (502), the both ends of the main shaft (5) are equipped with first axle section (6) and second axle section (601), the first axle section (6) is equipped with end cover (603), and the first axle section (6) is connected with third axle section (602), the gyro wheel (3) is connected on the third axle section (602), the main shaft support (501) is equipped with encoder support (604), the encoder support (604) is connected with the encoder (4), the encoder (4) is connected with the second axle section (601) through coupling (606), The monitoring assembly includes left box cover (7) and right box cover (701), the right box cover (701) is equipped with guide rail (702), the main shaft support (501) is equipped with guide rail box (703), the guide rail box (703) is equipped with sliding slot (704), the guide rail (702) is located in the sliding slot (704), The right box cover (701) is equipped with spring stopper (8), the spring stopper (8) is equipped with spring mounting hole (801), the bottom of the right box cover (701) is equipped with plug (802), the plug (802) is located in the spring mounting hole (801), the spring mounting hole (801) is equipped with spring (803), one end of the spring (803) is tightly connected with the plug (802), the other end of the spring (803) is tightly connected with the guide rail box (703). The end of the third axle section (602) is equipped with gland (607), the gland (607) is tightly connected with the gyro wheel (3), the end of the end cover (603) is equipped with sealing ring installation slot (608), the sealing ring installation slot (608) is equipped with sealing ring (605), the sealing ring (605) is connected on the first axle section (6).

2. The wheel rotation monitoring device for a wheel ultrasonic flaw detector according to claim 1, characterized in that: ​ 3. The apparatus for monitoring the rotation of a wheel of an ultrasonic wheel inspection machine according to claim 2, wherein: The left box cover (7) and the right box cover (701) are provided with mounting grooves (9) and waterproof sealing strip mounting grooves (903); the end cover (603) is arranged in the mounting groove (9), and the end cover (603) is connected with a sealing gasket (901); the waterproof sealing strip mounting groove (903) is provided with a waterproof strip; the waterproof strip is arranged between the sealing gasket (901) and the left box cover (7); the left box cover (7) is connected with a waterproof plate (902); the sealing gasket (901) is arranged between the waterproof plate (902) and the left box cover (7).

4. A wheel rotation monitoring device for a wheel ultrasonic testing machine according to claim 2 or 3, characterized in that: The bottom of the right box cover (701) is provided with an encoder connector (904); the encoder connector (904) is connected with the encoder (4); the bottom of the left box cover (7) is provided with an air pipe connector (905); the air pipe connector (905) is in communication with the inside of the left box cover (7).

5. The apparatus for monitoring the rotation of a wheel of an ultrasonic wheel inspection machine according to claim 4, wherein: The right box cover (701) is provided with a connecting plate (10); the connecting plate (10) is connected with a base (101); the base (101) is connected with a square tube (102); the workbench (1) comprises a cross beam (103); the square tube (102) is connected with the cross beam (103).

6. The wheel rotation monitoring device for a wheel ultrasonic flaw detector according to claim 5, wherein: The base (101) is provided with a first waist-shaped hole (104); the square tube (102) is provided with a first bolt, and the first bolt is connected in the first waist-shaped hole (104); the side surface of the base (101) is provided with a connecting groove (105); the connecting plate (10) is arranged in the connecting groove (105), and the connecting plate (10) is provided with a second waist-shaped hole (106); the second waist-shaped hole (106) is provided with a second bolt, and the second bolt is connected with the base (101); the top of the base (101) is provided with a screw rod (107); the screw rod (107) is provided with a stop block (108); the stop block (108) is connected with the connecting plate (10).

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