A vial size measuring device

Abstract

The application discloses a medicine bottle size measuring device and belongs to the technical field of measuring devices; the medicine bottle size measuring device comprises a shell and a measuring device; the measuring device comprises a first measuring mechanism, a second measuring mechanism and a third measuring mechanism; the first measuring mechanism is used for measuring the diameter of the outer wall of the bottom end of the medicine bottle; the second measuring mechanism is used for measuring the diameter of the outer wall of the part between the top end and the bottom end of the medicine bottle; and the third measuring mechanism is used for measuring the inner diameter of the top end of the medicine bottle; a signal processing mechanism comprises a displacement sensor, a PLC processor and a power supply; and the PLC processor is used for processing the displacement signal received by the displacement sensor. The first measuring mechanism, the second measuring mechanism and the third measuring mechanism are used for measuring three positions of the medicine, including the outer diameter and the inner diameter, so that the measuring efficiency is high and the measurement is more accurate.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of measuring equipment, and particularly relates to a vial size measuring equipment. BACKGROUND

[0002] In the production process of pharmaceutical products, the vial, as a direct packaging container of the medicine, is of great importance in terms of size accuracy. The accuracy of the vial size not only affects the packaging quality of the medicine, but also is closely related to the shelf life and transportation safety of the medicine. A vial with unqualified size may cause medicine leakage, dampness, and even bottle jam in the automated production line, which seriously affects the production efficiency and the quality of the medicine.

[0003] At present, there are various vial size measuring methods and equipment on the market. The traditional manual measurement method can detect some sizes of the vial, but the accuracy and consistency of the measurement results are difficult to guarantee due to the influence of human factors, and the efficiency is low, which cannot meet the needs of large-scale production. Some automated measuring equipment can improve the measuring efficiency to a certain extent, but the functions are often single. For example, some equipment can only measure the overall outer diameter of the vial, and cannot accurately detect the inner diameter of the upper port of the vial. The deviation of the inner diameter of the upper port of the vial may cause the sealing of the cap to be not tight enough, thereby affecting the sealing and stability of the medicine. At the same time, most of the existing equipment also cannot comprehensively measure the outer diameters of the vial at multiple different positions. When the vial has unqualified size, the production manufacturer is difficult to quickly and accurately determine the problem due to the lack of accurate measurement data of the sizes of multiple key positions, and cannot adjust the production process accordingly, resulting in a large number of defective products, resource waste and cost increase. In view of the above problems, the present application provides a vial size measuring equipment. SUMMARY

[0004] In view of the above technical problems, the technical solution adopted by the present application is as follows: a vial size measuring equipment, comprising:

[0005] a shell, the inside bottom end of the shell is provided with a vial placing portion;

[0006] a measuring device, the measuring device is installed on the shell, and comprises a first measuring mechanism, a second measuring mechanism and a third measuring mechanism; the first measuring mechanism is used for measuring the diameter of the outer wall of the bottom end of the vial, the second measuring mechanism is used for measuring the diameter of the outer wall between the top end and the bottom end of the vial, and the third measuring mechanism is used for measuring the inner diameter of the top end of the vial;

[0007] The signal processing mechanism comprises displacement sensors, a PLC processor and a power supply; the displacement sensors are respectively installed on the first measuring mechanism, the second measuring mechanism and the third measuring mechanism, and the PLC processor is used for processing displacement signals received by the displacement sensors.

[0008] Further, the first measuring mechanism comprises two symmetrically arranged arc-shaped positioning plates I, which are arranged to slide along the length direction of the shell; one end of each of the arc-shaped positioning plates I is connected with one end of a pull rod, the other end of the pull rod is connected with one end of a rotating rod, the other end of the rotating rod is in transmission connection with an output shaft of a motor, and the motor is fixedly installed in the interior of the shell.

[0009] Further, the first measuring mechanism further comprises two symmetrically arranged side rods I, one end of the side rod I is in rotational connection with the arc-shaped positioning plate I, the other end of the side rod I is connected with one end of a side rod II, the other end of the side rod II is in rotational connection with a sliding block I which is slidably installed on the shell, the connection position of the side rod I and the side rod II is in sliding fit with a guide rod arranged on the shell, a moving rod is fixedly installed on the sliding block I, and one end of the moving rod, which is away from the sliding block I, is detachably installed with an indicating needle I, one side of the indicating needle I is arranged with a scale I, and the scale I is detachably installed on the outside of the shell.

[0010] Further, the second measuring mechanism comprises two symmetrically arranged arc-shaped positioning plates II, one side of the arc-shaped positioning plate II is provided with an arc-shaped surface, and a horizontal frame is fixedly installed on the side of the arc-shaped positioning plate II, which is opposite to the arc-shaped surface; one side of the horizontal frame is slidably installed with one connecting head, and a reset spring III is arranged between the horizontal frame and the connecting head; the connecting head is connected with a sliding block II, and the sliding block II is in sliding fit with a rectangular groove on the arc-shaped positioning plate I.

[0011] Further, the second measuring mechanism further comprises two symmetrically arranged supporting rods, one end of the supporting rod is connected with the sliding block I, and the other end of the supporting rod is connected with the connection position of two push rods; one end of the push rod, which is not connected with the supporting rod, is installed on the arc-shaped positioning plate II; when the supporting rod moves along with the sliding block I, the supporting rod drives the arc-shaped positioning plate II to move through the push rod.

[0012] Further, two laser emitters are installed on each of the arc-shaped positioning plates II, and the laser emitters are used for emitting signals to the third measuring mechanism.

[0013] Further, the third measuring mechanism comprises two symmetrically arranged measuring rods, the measuring rods are slidingly installed on the turnover head, and a reset spring one is arranged between the measuring rods and the turnover head, a driving rod is arranged above the end of the two measuring rods close to each other, the driving rod is slidingly installed on the turnover head, and a through hole arranged in the turnover head is slidingly matched with an inclined surface arranged below the driving rod, and a reset spring two is arranged between the driving rod and the turnover head.

[0014] Further, the third measuring mechanism further comprises two symmetrically arranged horizontal plates, the horizontal plates are fixedly installed on the turnover head, and a second scale is arranged above the horizontal plates.

[0015] Further, the third measuring mechanism further comprises a rotating arm, the rotating arm is rotationally installed on the shell, and a damping is arranged at the connection between the rotating arm and the shell to overcome the automatic rotation of the rotating arm, a threaded rod is rotationally installed on the rotating arm, the threaded rod is in threaded cooperation with a sliding rod, the sliding rod is in sliding cooperation with the rotating arm, and the sliding rod is in rotational cooperation with the turnover head.

[0016] Compared with the prior art, the beneficial effects of the present application are as follows: (1) the first measuring mechanism, the second measuring mechanism and the third measuring mechanism are used to measure three places of the medicine, including the outer diameter and the inner diameter, so that the measurement efficiency is high and the measurement is more accurate; (2) the first measuring mechanism and the second measuring mechanism are used to measure two places of the medicine which are theoretically the same in diameter, so that the unqualified position can be intuitively obtained when unqualified products appear; (3) the outer wall of the medicine can be detected during the measurement by the first measuring mechanism, the second measuring mechanism and the third measuring mechanism, so that the presence of foreign matters or abnormal deformation can be prevented. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0018] Figure 2 It is a schematic diagram of the overall structure of the present application. Figure 1 It is a schematic diagram of the overall structure of the present application.

[0019] Figure 3 It is a schematic diagram of the overall structure of the present application. Figure 1 .

[0020] Figure 4 It is a schematic diagram of the overall structure of the present application. Figure 3 It is a schematic diagram of the overall structure of the present application.

[0021] Figure 5 It is a schematic diagram of the overall structure of the present application. Figure 2 .

[0022] Figure 6Part structure of the present application Figure 3 .

[0023] Figure 7 Part structure of the present application Figure 6 Part structure of the present application

[0024] Figure 8 Part structure of the present application Figure 4 .

[0025] Figure 9 Part structure of the present application Figure 8 Part structure of the present application

[0026] Figure 10 Part structure of the present application

[0027] The figure mark: 1-the shell; 2-motor; 3-rod; 4-pull rod; 5-arc positioning plate one; 6-rectangular groove; 7-side rod one; 8-guide rod; 9-side rod two; 10-sliding block one; 11-supporting rod; 12-moving rod; 13-indicator needle; 14-scale one; 15-push rod; 16-arc positioning plate two; 17-arc surface; 18-horizontal frame; 19-connector; 20-sliding block two; 21-laser emitter; 22-rotary arm; 23-threaded rod; 24-sliding rod; 25-flip head; 26-horizontal plate; 27-measuring rod; 28-reset spring one; 29-driving rod; 30-reset spring two; 31-inclined surface; 32-through hole; 33-scale two; 34-object carrier; 35-medicine bottle. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0029] Embodiment: as shown in the figure, a medicine bottle size measuring device includes: Figure 1 Figure 10 The shell 1, the bottom end inside the shell 1 is provided with a medicine bottle 35 for placing;

[0030] The measuring device, the measuring device is installed on the shell 1, the measuring device includes first measuring mechanism, second measuring mechanism and third measuring mechanism; the first measuring mechanism is used for measuring the diameter of the outer wall of the bottom end of the medicine bottle 35, the second measuring mechanism is used for measuring the outer wall diameter of the part between the top end and the bottom end of the medicine bottle 35, and the third measuring mechanism is used for measuring the inner diameter of the top end of the medicine bottle 35;

[0031] The measuring device, the measuring device is installed on the shell 1, the measuring device includes first measuring mechanism, second measuring mechanism and third measuring mechanism; the first measuring mechanism is used for measuring the diameter of the outer wall of the bottom end of the medicine bottle 35, the second measuring mechanism is used for measuring the outer wall diameter of the part between the top end and the bottom end of the medicine bottle 35, and the third measuring mechanism is used for measuring the inner diameter of the top end of the medicine bottle 35; ​

[0032] The signal processing mechanism comprises a displacement sensor, a PLC processor and a power supply. The displacement sensor is respectively installed on the first measuring mechanism, the second measuring mechanism and the third measuring mechanism, and the PLC processor is used for processing the displacement signal received by the displacement sensor.

[0033] As shown in Figure 1 and Figure 2 , when the medicine bottle 35 is measured, the medicine bottle 35 is placed into the shell 1 through the hole arranged at the center of the shell 1. The diameter of the hole at the center of the shell 1 is greater than the outer diameter of the largest medicine bottle 35 to be measured, so that the medicine bottle 35 can be smoothly placed in the shell 1 for measurement. The first measuring mechanism, the second measuring mechanism and the third measuring mechanism measure different positions of the medicine bottle 35, wherein the first measuring mechanism and the second measuring mechanism measure the outer diameter of the medicine bottle 35. On the one hand, the accuracy of measurement is improved, and on the other hand, whether the outer wall of the medicine bottle 35 is deformed is measured. The signal processing mechanism can also include a display and other common structures, which belong to the prior art. By processing the signal of the displacement sensor by the PLC, the distance signal measured can be converted into a digital signal and displayed on the display. The power supply is used to power the signal processing mechanism.

[0034] The first measuring mechanism comprises two symmetrically arranged arc-shaped positioning plates 5, which are arranged in the length direction of the shell 1. Each arc-shaped positioning plate 5 is connected with one end of a pull rod 4, and the other end of the pull rod 4 is connected with one end of a rotating rod 3. The other end of the rotating rod 3 is in transmission connection with the output shaft of a motor 2, and the motor 2 is fixedly installed in the interior of the shell 1.

[0035] The first measuring mechanism further comprises two symmetrically arranged side rods 7, one end of the side rod 7 is in rotational connection with the arc-shaped positioning plate 5, and the other end of the side rod 7 is connected with one end of a side rod 9. The other end of the side rod 9 is in rotational connection with a sliding block 10 which is slidingly installed on the shell 1. The connection between the side rod 7 and the side rod 9 is in sliding cooperation with a guide rod 8 arranged on the shell 1. The sliding block 10 is fixedly installed with a moving rod 12, and one end of the moving rod 12 away from the sliding block 10 is detachably installed with a indicating needle 13. A scale 14 is arranged on one side of the indicating needle 13, and the scale 14 is detachably installed on the outside of the shell 1.

[0036] As shown in Figure 2 — Figure 5When the medicine bottles 35 are placed into the shell 1, the motor 2 is started to drive the rotating rod 3 to move through the output shaft of the motor 2, so that the rotating rod 3 drives the pull rod 4 to move, and the pull rod 4 drives the arc-shaped positioning plate one 5 to move to the side close to the medicine bottles 35. At this time, the two arc-shaped positioning plate one 5 are close to the medicine bottles 35, and the moving stroke of the two medicine bottles 35 is consistent. In addition, each medicine bottle 35 is provided with a displacement sensor, which can detect the moving distance of the arc-shaped positioning plate one 5 and transmit the displacement signal to the PLC. In addition, the moving process of the two arc-shaped positioning plate one 5 is also the positioning process of the medicine bottles 35, so that the medicine bottles 35 are moved to the position of the center of the shell 1. The purpose of this is to improve the measurement result of the third measuring mechanism.

[0037] In addition, in the moving process of the arc-shaped positioning plate one 5, the side rod one 7 connected with the arc-shaped positioning plate one 5 drives the side rod two 9 to slide on the guide rod 8, so that the side rod two 9 drives the sliding block one 10 to slide on the shell 1. The moving rod 12 connected with the sliding block one 10 drives the indicating needle one 13 to move relative to the scale one 14. The final position of the indicating needle one 13 and the scale one 14 can know the linear moving distance of the indicating needle one 13. Since the two arc-shaped positioning plate one 5 move, the moving distance of the indicating needle one 13 is multiplied by 2, which is the outer diameter of the medicine bottles 35. The purpose of this is to measure in multiple ways and improve the accuracy of measurement.

[0038] The second measuring mechanism comprises two symmetrically arranged arc-shaped positioning plate two 16. One side of the arc-shaped positioning plate two 16 is provided with an arc surface 17. The arc-shaped positioning plate two 16 is fixedly installed with a horizontal frame 18 on the side opposite to the arc surface 17. The horizontal frame 18 is slidably installed with a connecting head 19 on both sides. The horizontal frame 18 is provided with a reset spring three between the horizontal frame 18 and the connecting head 19. The connecting head 19 is connected with a sliding block two 20. The sliding block two 20 is slidably matched with the rectangular groove 6 on the arc-shaped positioning plate one 5.

[0039] The second measuring mechanism further comprises two symmetrically arranged supporting rods 11. One end of the supporting rod 11 is connected with the sliding block one 10. The other end of the supporting rod 11 is connected with the connecting part of the two push rods 15. The end of the push rod 15 not connected with the supporting rod 11 is installed on the arc-shaped positioning plate two 16. When the supporting rod 11 moves with the sliding block one 10, the supporting rod 11 drives the arc-shaped positioning plate two 16 to move through the push rod 15.

[0040] Two laser emitters 21 are installed on each arc-shaped positioning plate two 16. The laser emitters 21 are used to emit signals to the third measuring mechanism.

[0041] As shown in Figure 2 , Figure 4 , Figure 5 ,Figure 6 , Figure 7 As shown, when the sliding block 10 slides along the housing 1, the sliding block 10 will drive the support rod 11 to move together, thereby causing the support rod 11 to drive the two arc-shaped positioning plates 16 to move in a direction closer to each other (towards...). Figure 5 Based on the angle and the parts shown, when the arc-shaped positioning plate 5 moves closer to the center of the housing 1, that is... Figure 5 If the arc-shaped positioning plate 5 moves to the left, then the side rods 7 and 9 will move closer to the motor 2, causing the sliding block 10 and support rod 11 to move to the right. The rightward movement of the support rod 11 will then drive the push rod 15 and the arc-shaped positioning plate 16 to move towards the center, thus causing the arc-shaped surfaces 17 on the two arc-shaped positioning plates 16 to adhere to the outer wall of the medicine bottle 35. On one hand, the displacement sensors installed on the arc-shaped positioning plates 16 can detect the distance moved and transmit the distance signal to the PLC for processing. The result is then displayed on the monitor. Theoretically, if the quality of the medicine bottle 35 is up to standard, the distance measured by the displacement sensor on the arc-shaped positioning plate 2 16 should be equal to the distance measured by the displacement sensor on the arc-shaped positioning plate 1 5. If they are not equal, the problem can be found based on the diameter measured at different positions. On the other hand, the laser emitter 21 on the arc-shaped positioning plate 2 16 will emit a signal to the horizontal plate 26 in the third measuring mechanism when the arc-shaped positioning plate 2 16 stops moving, thereby detecting whether there are any protrusions on the outer wall of the medicine bottle 35. That is, if the horizontal plate 26 does not receive the signal from the laser emitter 21, it means that there is an excess part on the outer wall of the medicine bottle 35 blocking the light emitted by the laser emitter 21, which will remind the staff to conduct inspection and troubleshooting.

[0042] The third measuring mechanism includes two symmetrically arranged measuring rods 27, which are slidably mounted on the flip head 25. A return spring 28 is provided between the measuring rods 27 and the flip head 25. A drive rod 29 is provided above the two measuring rods 27 at their respective ends. The drive rod 29 is slidably mounted on the flip head 25. A through hole 32 provided inside the flip head 25 is slidably engaged with the inclined surface 31 provided below the drive rod 29. A return spring 30 is provided between the drive rod 29 and the flip head 25.

[0043] The third measuring mechanism also includes two symmetrically arranged horizontal plates 26, which are fixedly installed on the flip head 25, and a scale ruler 23 is provided above the horizontal plates 26.

[0044] The third measuring mechanism further comprises a rotating arm 22, which is rotatably installed on the housing 1, and a damping device is arranged at the connecting position between the rotating arm 22 and the housing 1 to prevent the rotating arm 22 from rotating automatically. A threaded rod 23 is rotatably installed on the rotating arm 22, and the threaded rod 23 is in threaded cooperation with a sliding rod 24, which is in sliding cooperation with the rotating arm 22 and is rotatably connected with a turnover head 25.

[0045] As shown in Figure 1 、 Figure 8 、 Figure 9 、 Figure 10 When the vial 35 is detected, the rotating arm 22 rotatably installed on the housing 1 is rotated to the state shown in Figure 1 . In the initial state, the long side direction of the rotating arm 22 is parallel to the upper surface of the housing 1, and the sliding rod 24 is clamped between two object holders 34, which are fixedly installed on the housing 1 and are used to prevent the rotating arm 22 from shaking. Then the threaded rod 23 is rotated to enable the sliding rod 24 in threaded cooperation with the threaded rod 23 to slide downward along the rotating arm 22 until the lower surface of the horizontal plate 26 contacts the upper end surface of the vial 35. At this time, the driving rod 29 is pushed downward, and the two measuring rods 27 are moved away from each other by the slope 31 below the driving rod 29. When the measuring rods 27 reach the inner wall of the upper end surface of the vial 35, the driving rod 29 stops moving. At this time, the displacement sensor on the measuring rod 27 can transmit the displacement signal to the PLC and display the moving distance on the display, so that the inner diameter size of the inner wall of the upper end of the vial 35 can be obtained. In this process, the reset spring I 28 and the reset spring II 30 are deformed, and the functions of the reset spring I 28 and the reset spring II 30 are to assist the reset of the measuring rod 27 and the driving rod 29, respectively. Similarly, the moving distance of the driving rod 29 along the scale II 33 can also directly reflect the diameter of the inner wall of the upper end of the vial 35. The angle between the slope 31 and the ground is forty-five degrees, and according to the properties of the isosceles right triangle, the moving distance of the two measuring rods 27 can be obtained, and thus the inner diameter size can be obtained. At the same time, if the horizontal plate 26 can receive the light signal emitted by the laser emitter 21, it means that the appearance of the outer wall of the vial 35 meets the requirements.

[0046] The above examples are only used to illustrate the technical solutions of the present application, but not limit the present application; the technical features in the above examples or different examples can be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as above, which are not provided in details for simplicity; although the present application is described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A vial sizing apparatus, comprising: The utility model relates to a medicine bottle measuring device, including: The shell (1) inside bottom end is provided with for placing medicine bottle (35); Measuring device, measuring device installs on the shell (1), and measuring device includes first measuring mechanism, second measuring mechanism and third measuring mechanism;The first measuring mechanism is used for measuring the diameter of the outer wall of the bottom end of the medicine bottle (35), the second measuring mechanism is used for measuring the diameter of the outer wall between the top end and the bottom end of the medicine bottle (35), and the third measuring mechanism is used for measuring the inner diameter of the top end of the medicine bottle (35); The first measuring mechanism includes two symmetrical arrangement arc locating plate no. (5), the arc locating plate no. (5) is slidably arranged along the length direction of the shell (1), each arc locating plate no. (5) is connected with one end of pull rod (4), the other end of pull rod (4) is connected with one end of rotary bar (3), the other end of rotary bar (3) is transmission connection with the output shaft of motor (2), and the motor (2) is fixedly installed in the inside of the shell (1);The first measuring mechanism further includes two symmetrical arrangement side bars no. (7), one end of side bar no. (7) is rotatably connected with arc locating plate no. (5), the other end of side bar no. (7) is connected with one end of side bar no. (9), the other end of side bar no. (9) is rotatably connected with sliding block no. (10) slidably installed on the shell (1), the connecting place of side bar no. (7) and side bar no. (9) is slidably matched with guide rod (8) arranged on the shell (1), sliding block no. (10) is fixedly installed with moving rod (12), one end of moving rod (12) away from sliding block no. (10) is detachably installed with indicating needle (13), scale no. (14) is arranged on the side of indicating needle (13), and scale no. (14) is detachably installed on the outside of the shell (1); The second measuring mechanism includes two symmetrical arrangement arc locating plate no. (16), one side of arc locating plate no. (16) is provided with arc surface (17), horizontal frame (18) is fixedly installed on the side of arc locating plate no. (16) opposite to arc surface (17), one connecting head (19) is slidably installed on the two sides of horizontal frame (18) respectively, reset spring no. (3) is arranged between horizontal frame (18) and connecting head (19), connecting head (19) is connected with sliding block no. (20), and sliding block no. (20) is slidably matched with rectangular groove (6) on arc locating plate no. (5);The second measuring mechanism further includes two symmetrical arrangement support rods (11), one end of support rod (11) is connected with sliding block no. (10), and the other end of support rod (11) is connected with the connecting place of two push rods (15), one end of push rod (15) not being connected with support rod (11) is installed on arc locating plate no. (16), when the support rod (11) moves along with sliding block no. (10), the support rod (11) moves arc locating plate no. (16) through push rod (15) drive; The signal processing mechanism comprises displacement sensors, a PLC processor and a power supply; the displacement sensors are respectively installed on the first measuring mechanism, the second measuring mechanism and the third measuring mechanism, and the PLC processor is used for processing displacement signals received by the displacement sensors.

2. A vial sizing apparatus as defined in claim 1, wherein, Each of the arc-shaped positioning plates (16) is provided with two laser emitters (21) for emitting signals to the third measuring mechanism.

3. A vial sizing apparatus as defined in claim 2, wherein, The third measuring mechanism comprises two symmetrically arranged measuring rods (27) which are slidingly installed on a turnover head (25) and are provided with reset springs (28) between the measuring rods (27) and the turnover head (25); a driving rod (29) is arranged above the end of the two measuring rods (27) close to each other, the driving rod (29) is slidingly installed on the turnover head (25), a through hole (32) arranged in the turnover head (25) is slidingly matched with an inclined surface (31) arranged below the driving rod (29), and reset springs (30) are arranged between the driving rod (29) and the turnover head (25).

4. A vial sizing apparatus as defined in claim 3, wherein, The third measuring mechanism further comprises two symmetrically arranged horizontal plates (26) which are fixedly installed on the turnover head (25), and a scale (33) is arranged above the horizontal plates (26).

5. A vial sizing apparatus as defined in claim 4, wherein, The third measuring mechanism further comprises a rotating arm (22) which is rotatably installed on the shell (1) and is provided with a damper at the connection between the rotating arm (22) and the shell (1) to overcome automatic rotation of the rotating arm (22); a threaded rod (23) is rotatably installed on the rotating arm (22), the threaded rod (23) is screwedly matched with a sliding rod (24), the sliding rod (24) is slidingly matched with the rotating arm (22), and the sliding rod (24) is rotatably matched with the turnover head (25).

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