Turnover bed for burns and scalds
By integrating motor, reducer and sensor on the burn and scald turnover bed, electric stable turnover and angle adjustment are achieved, solving the problems of unstable position and complex operation in the prior art, and improving turnover efficiency and safety.
Patent Information
- Application Number
- CN202420997086.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-10
AI Technical Summary
The existing burn and scald turnover bed is difficult to maintain the patient's horizontal position during the turnover operation, and manual turnover requires a lot of physical strength and multiple people to cooperate. The operation of the electric equipment is complicated, which increases the difficulty and risk of treatment.
A burn-scalding turn-over bed including a motor, reducer, positioning plate and sensor is designed. By electric control of the rotation of the top and bottom plates, the sensors are used to detect and adjust the rotation angle to ensure that the level is maintained after flip, and the burden and shaking of the operator is reduced.
The electric stable turnover is achieved, which reduces the burden and operation difficulty of patients turning over, improves the treatment efficiency, and reduces the shaking of the top plate and the bottom plate through the reinforced structure, ensuring the safety and comfort of the patients.
Smart Images
Figure CN222285797U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a burn and scald auxiliary device, in particular to a burn and scald turning bed. Background Art
[0002] The skin is an important organ of the body. It is a sensory receptor with cold, heat, touch and pain. It can respond to external stimuli through reflex activities. As the outermost protective organ and natural barrier of the body, the skin can resist the invasion of external irritants and microorganisms, prevent the loss of body fluids, and has the function of regulating body temperature. It can also excrete some metabolic products through sweat glands. However, once the skin is burned, that is, the skin is damaged by heat, the skin loses its original function and releases harmful chemicals. In addition, the necrotic tissue is a hotbed for bacterial reproduction. Therefore, the skin will become a portal for systemic infection. For this reason, for patients with burns and critical burns, it is necessary to send the patient to the doctor for treatment as soon as possible. The treatment methods for patients include pain relief, infection prevention and treatment, wound repair, etc. Because the patient's burns are relatively serious, the patient needs to be turned over during treatment to facilitate treatment. However, it is difficult for patients with burns to turn over by themselves, and secondary injuries are easily caused during the turning process. Therefore, a burn and scald turning bed is needed to change the patient's position to facilitate the patient's cooperation in treatment.
[0003] The burn and scald turning bed is a bed that can help burn and scald patients turn over. The burn and scald turning bed mainly includes a top plate, a bottom plate and a rotating mechanism. The patient is first placed on the bottom plate, and the patient's front is treated. After the front of the patient is treated, a sterile cotton pad, a large sterilized sheet and a sterilized mattress are covered on the front of the patient; then the top plate is covered on the front of the patient, and relevant fixing measures are taken to prevent the patient from falling out of bed; then, the patient is driven to change his position through the rotating mechanism, and the bottom plate is removed to facilitate the treatment of the patient's back. This operation is repeated to meet the patient's need to turn over. Although this method can solve the problem of turning over of the patient, it is difficult to ensure that the patient remains lying horizontally after the patient completes the change of position, so that the patient lies on the burn and scald turning bed at an angle. Therefore, during the treatment of the patient, the patient's specific downward trend is not conducive to the treatment of the patient. In addition, manually turning over a patient does require a lot of physical strength, and for this reason, multiple people are required to work together to complete the turning operation, which makes it very inconvenient for the patient to turn over; and if an electric device is used to turn the patient over, it is necessary to adjust the patient's position while paying attention to whether the patient falls out of bed in real time, which obviously still requires multiple people to work together. Therefore, in order to reduce the difficulty of turning over and improve the treatment efficiency of patients, the burn and scald turning bed obviously has room for improvement. Summary of the invention
[0004] In view of the deficiencies in the prior art, the utility model provides a burn and scald turning bed which can electrically and stably complete the turning operation, quickly adjust the top plate and the bottom plate to keep them level, and reduce the operating burden and difficulty of the operator, so as to overcome the defects in the prior art.
[0005] The technical solution adopted by the utility model is: a turning bed for burns and scalds, comprising a bed body, two brackets arranged on the bed body and universal wheels arranged below the bed body, a top plate and a bottom plate parallel to the top plate are arranged between the two brackets, two turntables are arranged on the top plate, two ends of the top plate and two ends of the bottom plate are respectively connected to the two turntables, the two turntables are respectively rotatably connected to the two brackets, and a motor and a reducer are installed on one of the brackets; the reducer comprises a chassis, an input shaft and an output shaft rotatably arranged in the chassis, the input shaft and the output shaft are transmission-connected, two sides of the output shaft respectively extend out of the chassis, one end of the output shaft is connected to one of the turntables, a positioning plate is arranged on the other end of the output shaft, a first distance sensor is arranged on one side of the chassis, the detection end of the first distance sensor faces the positioning plate, and the input shaft is connected to the output end of the motor.
[0006] Preferably, the chassis is provided with a box cover, which is installed on one of the brackets, an L-shaped support plate is provided on one side of the chassis, the support plate, the motor and the chassis are all installed in the box cover, the horizontal plate of the support plate is located between the chassis and the motor, the first distance sensor is installed on the vertical plate of the support plate, the first distance sensor and the output shaft are located in the same plane, the positioning plate adopts an N-shaped plate mounting structure, the positioning plate is parallel to the top plate, the sensing end of the first distance sensor faces the vertical rod of the positioning plate, the box cover is provided with a box body, and the first distance sensor, the positioning plate, the support plate, the motor and the chassis are all located in the box body.
[0007] Preferably, a fixing tube is hingedly provided at the bottom end of one of the brackets, a handle is rotatably provided on one end of the fixing tube, an adjusting tube is movably sleeved inside the fixing tube, one side of the adjusting tube passes through the other end of the fixing tube, an adjusting rod is threadedly sleeved inside the adjusting tube, and one end of the adjusting rod is installed on the handle; a fixing frame is provided on one side of the adjusting tube, one end of the fixing frame is installed on the adjusting tube, a sleeve is provided above the fixing frame, the sleeve is installed in the middle of the fixing frame, a fixing shaft is movably sleeved inside the sleeve, the fixing shaft is installed on the bed, and a supporting shaft is provided at the other end of the fixing frame.
[0008] Preferably, the middle portion of the support shaft adopts an arc-shaped structure, and fixing plates are respectively provided at both ends of the support shaft, and the bottom of the fixing plate is installed on the support shaft.
[0009] Preferably, a second distance sensor is provided on the bed, and the sensing end of the second distance sensor faces the supporting shaft.
[0010] Preferably, two supports are provided above the bed, and the two supports are respectively mounted on two brackets. One side of the output shaft is rotatably mounted in one of the supports, and a rotating shaft is rotatably mounted in the other support. The rotating shaft and the output shaft are respectively mounted on two turntables, and the central axes of the rotating shaft and the output shaft are located on the same axis.
[0011] Preferably, two threaded rods are provided on the inner side of the turntable, and cylinders are respectively provided on the top and bottom of the turntable, and the two threaded rods are respectively installed on the cylinders provided on the top and bottom of the turntable, and U-shaped plug-ins are respectively provided on the top plate and the bottom plate, and the plug-ins are sleeved in the threaded rods, and nuts are respectively provided on both sides of the plug-ins, and the nuts are threadedly sleeved on the threaded rods, and the plug-ins are clamped on the threaded rods by the nuts, so as to facilitate the loading and unloading of the top plate and the bottom plate.
[0012] The beneficial effects of the utility model are as follows: first, the utility model can electrically control the rotation of the turntable through the motor, and the reducer can increase the torque of the motor, thereby reducing the load of the motor, and then can electrically and stably drive the top plate and the bottom plate to rotate, which is convenient for driving the patient to turn over and reduces the burden of turning over for the patient. In addition, the utility model can drive the positioning plate to rotate through the reducer through the positioning plate and the first distance sensor, and use the first distance sensor to detect the distance between the first distance sensor and the positioning plate, so as to determine the rotation angle of the positioning plate, thereby determining the rotation angle of the top plate and the bottom plate, so as to facilitate and quickly adjust the top plate and the bottom plate after turning over to keep them level, reduce the difficulty of operation for operators, and improve the efficiency of turning over for patients, so as to facilitate treatment of patients.
[0013] Secondly, the utility model protects the first distance sensor, the positioning plate, the motor and the reducer through the provided box cover and the box body, supports the first distance sensor through the provided support plate, and reinforces the motor and the chassis, so as to use the first distance sensor to detect the distance between the vertical rod of the positioning plate and the first distance sensor, so as to ensure that the top plate and the bottom plate are kept horizontally placed. In addition, the utility model drives the adjustment rod to rotate through the provided handle, and the adjustment tube can move along the adjustment rod under the constraint of the fixed frame, thereby pushing the fixed frame to rotate around the fixed axis, so that the support axis contacts the top plate or the bottom plate, so as to reinforce the top plate or the bottom plate and reduce the shaking of the top plate or the bottom plate.
[0014] Thirdly, the utility model adopts an arc structure in the middle of the support shaft to prevent the top plate or the bottom plate from colliding with the support shaft during the rotation of the top plate and the bottom plate, and limits the side of the top plate or the bottom plate by setting a fixed plate to strengthen the limiting effect of the top plate or the bottom plate, and further reduce the shaking of the top plate or the bottom plate. In addition, the utility model measures the distance between the support shaft and the second distance sensor through the second distance sensor set on the bed body to determine the position of the support shaft, that is, the turning operation can be performed only after the support shaft turns to be close to the bed body, so as to avoid the support shaft interfering with the rotation of the top plate or the bottom plate. At the same time, the utility model facilitates the loading and unloading of the top plate and the bottom plate through the bolt rod set on the turntable, the nut threaded on the bolt rod, and the plug plates respectively set on the top plate and the bottom plate to meet the needs of treating patients. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional schematic diagram of the utility model.
[0016] Figure 2 for Figure 1 A magnified schematic diagram of center A.
[0017] Figure 3 for Figure 1 A magnified schematic diagram of point B in the middle.
[0018] Figure 4 It is a schematic diagram of the assembly of the motor, the reducer, the first distance sensor and the box cover in the utility model.
[0019] Figure 5 It is a structural schematic diagram of the reducer in the utility model.
[0020] Figure 6 It is a cross-sectional assembly diagram of the adjusting rod and the handle in the utility model. DETAILED DESCRIPTION
[0021] like Figures 1 to 6As shown, a turning bed for burns and scalds comprises a bed body 1, two brackets 2 arranged on the bed body 1 and a universal wheel 3 arranged below the bed body 1, a top plate 4 and a bottom plate 5 parallel to the top plate 4 are arranged between the two brackets 2, two turntables 6 are arranged on the top plate 4, two ends of the top plate 4 and two ends of the bottom plate 5 are respectively connected to the two turntables 6, the two turntables 6 are respectively rotatably connected to the two brackets 2, and a motor 7 and a reducer are installed on one of the brackets 2; the reducer comprises a chassis 8, an input shaft 9 and an output shaft 10 rotatably arranged in the chassis 8, the input shaft 9 and the output shaft 10 are transmission-connected, both sides of the output shaft 10 respectively extend out of the chassis 8, one end of the output shaft 10 is connected to one of the turntables 6, a positioning plate 11 is arranged on the other end of the output shaft 10, a first distance sensor 12 is arranged on one side of the chassis 8, the detection end of the first distance sensor 12 faces the positioning plate 11, and the input shaft 9 is connected to the output end of the motor 7. By controlling the operation of the motor 7, the input shaft 9, the output shaft 10, the turntable 6, the top plate 4, the bottom plate 5 and the positioning plate 11 are driven to rotate, so as to facilitate the patient to complete the turning operation. At the same time, the first distance sensor 12 detects the distance between the first distance sensor 12 and the positioning plate 11 to locate the rotation angle of the positioning plate 11, so as to facilitate the positioning of the rotation angles of the top plate 4 and the bottom plate 5, so that after the patient completes the turning operation, the top plate 4 and the bottom plate 5 are adjusted to be placed horizontally.
[0022] In this embodiment, the chassis 8 is provided with a box cover 13, and the box cover 13 is installed on one of the brackets 2. A support plate 14 of an L-shaped structure is provided on one side of the chassis 8. The support plate 14, the motor 7 and the chassis 8 are all installed in the box cover 13. The horizontal plate of the support plate 14 is located between the chassis 8 and the motor 7. The first distance sensor 12 is installed on the vertical plate of the support plate 14. The first distance sensor 12 and the output shaft 10 are located in the same plane. The positioning plate 11 adopts an n-shaped plate mounting structure. The positioning plate 11 is parallel to the top plate 4. The sensing end of the first distance sensor 12 faces the vertical rod of the positioning plate 11. The box cover 13 is provided with a box body 15. The first distance sensor 12 and the positioning plate 11, the support plate 14, the motor 7 and the chassis 8 are all located in the box body 15, so as to protect the first distance sensor 12, the positioning plate 11, the support plate 14, the motor 7 and the reducer. The distance between the vertical rod of the positioning plate 11 and the first distance sensor 12 is detected by the first distance sensor 12 to ensure that the top plate 4 and the bottom plate 5 remain horizontally placed. Furthermore, a sleeve hole is opened on the horizontal plate of the support plate 14, and the sleeve hole is sleeved on the output end or input shaft 9 of the motor 7. A central control component is arranged on the chassis 8, and the central control component is electrically connected to the motor 7 and the first distance sensor 12 respectively, so as to control the rotation of the motor 7 according to the information fed back by the first distance sensor 12.
[0023] Please refer again Figure 1 and 6 The bottom end of one of the brackets 2 is hinged with a fixed tube 16, one end of the fixed tube 16 is rotatably provided with a handle 17, an adjusting tube 18 is movably sleeved in the fixed tube 16, one side of the adjusting tube 18 passes through the other end of the fixed tube 16, an adjusting rod 19 is sleeved in the inner thread of the adjusting tube 18, one end of the adjusting rod 19 is mounted on the handle 17; a fixing frame 20 is provided on one side of the adjusting tube 18, one end of the fixing frame 20 is mounted on the adjusting tube 18, a sleeve 21 is provided above the fixing frame 20, the sleeve 21 is installed in the middle of the fixing frame 20, and the sleeve The movable sleeve 21 is provided with a fixed shaft 22, and the fixed shaft 22 is installed on the bed body 1. The other end of the fixed frame 20 is provided with a support shaft 23, so that the fixed frame 20 is hinged on the bed body 1. Therefore, when the handle 17 is turned, the adjusting rod 19 rotates with the handle, and the adjusting tube 18 is constrained by the fixed frame 20. The adjusting tube 18 can move along the adjusting rod 19, thereby pushing the fixed frame 20 to rotate around the fixed shaft 22, and then the support shaft 23 is in contact with the top plate 4 or the bottom plate 5, so as to reinforce the top plate 4 or the bottom plate 5 and reduce the shaking of the top plate 4 or the bottom plate 5.
[0024] Specifically, the middle part of the support shaft 23 adopts an arc structure to avoid the top plate 4 and the bottom plate 5 to prevent the top plate 4 or the bottom plate 5 from colliding with the support shaft 23 during the rotation of the top plate 4 and the bottom plate 5. Fixed plates 24 are respectively provided at both ends of the support shaft 23. The bottom of the fixed plate 24 is installed on the support shaft 23. The fixed plate 24 contacts the side of the top plate 4 or the bottom plate 5, thereby reinforcing the fixing method of the top plate 4 or the bottom plate 5 and further reducing the shaking of the top plate 4 or the bottom plate 5.
[0025] Please refer again Figure 3 A second distance sensor 25 is provided on the bed body 1, and the sensing end of the second distance sensor 25 faces the support shaft 23. The distance between the support shaft 23 and the second distance sensor 25 is detected by the second distance sensor 25 to determine the position of the support shaft 23. By connecting the second distance sensor 25 with the central control component, the motor 7 can be started only after the second distance sensor 25 transmits the sensing information, so that the support shaft 23 collides with the top plate 4 or the bottom plate 5 during the rotation of the top plate 4 and the bottom plate 5.
[0026] In this embodiment, two supports 26 are provided above the bed body 1, and the two supports are respectively installed on the two brackets 2. One side of the output shaft 10 is rotatably mounted in one of the supports 26, and a rotating shaft 27 is rotatably mounted in the other support 26. The rotating shaft 27 and the output shaft 10 are respectively mounted on two turntables 6, and the central axes of the rotating shaft 27 and the output shaft 10 are located on the same axis. Specifically, bearings are respectively mounted in the two supports 26, and the bearings are mounted on the rotating shaft 27 or the output shaft 10, so as to facilitate the output shaft 10, the turntable 6, the top plate 4, the bottom plate 5 and the positioning plate 11 to rotate around the axis of the output shaft 10, so as to drive the patient to complete the turning operation.
[0027] Specifically, two threaded rods 28 are provided on the inner side of the turntable 6, and cylinders 29 are respectively provided on the top and bottom of the turntable 6. The two threaded rods 28 are respectively installed on the cylinders 29 provided on the top and bottom of the turntable 6. The top plate 4 and the bottom plate 5 are respectively provided with U-shaped plug-ins 30, which are sleeved in the threaded rods 28. Nuts 31 are respectively provided on both sides of the plug-in plates 30, and the nuts 31 are threadedly sleeved on the threaded rods 28. The plug-in plates 30 are clamped on the threaded rods 28 by the nuts 31, so as to facilitate the loading and unloading of the top plate 4 and the bottom plate 5.
[0028] The method of using this product is as follows: Figures 1 to 6As shown, first, before using this product, you need to clean the turning bed and related equipment to ensure that this product is clean and hygienic. Fix the two sides of the bottom plate 5 to the bolt rods 28 at the bottom of the two turntables 6 through nuts 31, and cover the bottom plate 5 with a sterilized mattress, a large sterilized sheet and a sterile cotton pad, so that the patient can lie on the bottom plate 5; then connect the motor 7, the first distance sensor 12 and the second distance sensor 25 to the power supply to facilitate the operation of turning the patient over. Then, when using this product again, first push the patient to one side of this product, adjust the sterilized mattress, large sterilized sheet and sterile cotton pad on the bottom plate 5 according to the patient's height and needs, and slowly translate the patient to the bottom plate 5, so as to facilitate the treatment of the patient's front. Then, after the front of the patient is processed, the front of the patient is covered with a sterile cotton pad, a large sterile sheet and a sterile mattress in sequence, and then the top plate 4 is covered on the front of the patient, so that the plug plates 30 on both sides of the top plate 4 are sleeved on the bolt rods 28 on the top of the two plates 6, and the top plate 4 is fixed by nuts 31, and the patient is fixed with a belt, a rotating rod, etc. Finally, the motor 7 is controlled to drive the patient to turn over gently, and the patient's shoulders, abdomen, legs and other parts that are not burned or scalded are gently supported to prevent the patient from falling out of bed, and the first distance sensor 12 is used to detect the distance between the first distance sensor 12 and the positioning plate 11 to determine the flipping angle of the top plate 4 and the bottom plate 5, so that the top plate 4 and the bottom plate 5 after flipping are kept horizontal. After the flipping is completed, the handle 17 is turned to push the fixing frame 20 to rotate around the fixed axis 22, so that the support axis 23 contacts the top plate 4 or the bottom plate 5, so as to reinforce the top plate 4 or the bottom plate 5 and reduce the shaking of the top plate 4 or the bottom plate 5.
[0029] The motor 7 provided in this embodiment can electrically control the turntable to rotate, and the reducer connected to the motor 7 can increase the torque of the motor 7, thereby reducing the load of the motor 7, and then can electrically and stably drive the top plate and the bottom plate to rotate, which is convenient for driving the patient to turn over and reduces the burden of the patient turning over. In addition, the utility model drives the positioning plate 11 to rotate through the reducer through the provided positioning plate 11 and the first distance sensor 12, and uses the first distance sensor 12 to detect the distance between the first distance sensor 12 and the positioning plate 11, and can determine the rotation angle of the positioning plate 11, thereby determining the rotation angle of the top plate 4 and the bottom plate 5, so as to facilitate and quickly adjust the top plate 4 and the bottom plate 5 after turning over to keep them level, reduce the difficulty of operation for operators, and improve the efficiency of turning over patients, so as to facilitate the treatment of patients.
[0030] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.
Claims
1. A turning bed for burns and scalds, comprising a bed body (1), two brackets (2) arranged on the bed body (1), and universal wheels (3) arranged below the bed body (1), characterized in that: A top plate (4) and a bottom plate (5) parallel to the top plate (4) are arranged between the two brackets (2); two turntables (6) are arranged on the top plate (4); two ends of the top plate (4) and two ends of the bottom plate (5) are respectively connected to the two turntables (6); the two turntables (6) are respectively rotatably connected to the two brackets (2); a motor (7) and a reducer are installed on one of the brackets (2); The reducer comprises a chassis (8), an input shaft (9) and an output shaft (10) rotatably arranged in the chassis (8), the input shaft (9) and the output shaft (10) being transmission-connected, the two sides of the output shaft (10) respectively extending out of the chassis (8), one end of the output shaft (10) being connected to one of the rotating disks (6), a positioning plate (11) being arranged on the other end of the output shaft (10), a first distance sensor (12) being arranged on one side of the chassis (8), a detection end of the first distance sensor (12) facing the positioning plate (11), and the input shaft (9) being connected to the output end of the motor (7).
2. The burn and scald turning bed according to claim 1, characterized in that: The chassis (8) is provided with a box cover (13), which is mounted on one of the brackets (2). A support plate (14) of an L-shaped structure is provided on one side of the chassis (8). The support plate (14), the motor (7) and the chassis (8) are all mounted in the box cover (13). The horizontal plate of the support plate (14) is located between the chassis (8) and the motor (7). The first distance sensor (12) is mounted on the vertical plate of the support plate (14). The first distance sensor (12) and the output shaft (10) are located in the same plane. The positioning plate (11) adopts an N-shaped plate mounting structure. The positioning plate (11) is parallel to the top plate (4). The sensing end of the first distance sensor (12) faces the vertical rod of the positioning plate (11). The box cover (13) is provided with a box body (15). The first distance sensor (12), the positioning plate (11), the support plate (14), the motor (7) and the chassis (8) are all located in the box body (15).
3. The burn and scald turning bed according to claim 1, characterized in that: A fixing tube (16) is hingedly connected to the bottom end of one of the brackets (2), a handle (17) is rotatably provided on one end of the fixing tube (16), an adjusting tube (18) is movably sleeved inside the fixing tube (16), one side of the adjusting tube (18) passes through the other end of the fixing tube (16), an adjusting rod (19) is sleeved on the inner thread of the adjusting tube (18), one end of the adjusting rod (19) is mounted on the handle (17); a fixing frame (20) is provided on one side of the adjusting tube (18), one end of the fixing frame (20) is mounted on the adjusting tube (18), a sleeve (21) is provided above the fixing frame (20), the sleeve (21) is mounted on the middle part of the fixing frame (20), a fixing shaft (22) is movably sleeved inside the sleeve (21), the fixing shaft (22) is mounted on the bed body (1), and a supporting shaft (23) is provided on the other end of the fixing frame (20).
4. The burn and scald turning bed according to claim 3, characterized in that: The middle portion of the support shaft (23) adopts an arc-shaped structure, and fixing plates (24) are respectively provided at both ends of the support shaft (23), and the bottom of the fixing plate (24) is mounted on the support shaft (23).
5. The burn and scald turning bed according to claim 3, characterized in that: The bed body (1) is provided with a second distance sensor (25), and the sensing end of the second distance sensor (25) faces the support shaft (23).
6. The burn and scald turning bed according to claim 1, characterized in that: Two supports (26) are arranged above the bed body (1), and the two supports are respectively mounted on the two brackets (2). One side of the output shaft (10) is rotatably mounted in one of the supports (26), and a rotating shaft (27) is rotatably mounted in the other support (26). The rotating shaft (27) and the output shaft (10) are respectively mounted on the two turntables (6), and the central axes of the rotating shaft (27) and the output shaft (10) are located on the same axis.
7. The burn and scald turning bed according to claim 1, characterized in that: Two threaded rods (28) are arranged inside the rotating disk (6), and cylinders (29) are arranged at the top and bottom of the rotating disk (6), respectively. The two threaded rods (28) are mounted on the cylinders (29) arranged at the top and bottom of the rotating disk (6), respectively. U-shaped plug plates (30) are arranged on the top plate (4) and the bottom plate (5), respectively. The plug plates (30) are sleeved in the threaded rods (28), and nuts (31) are arranged on both sides of the plug plates (30), and the nuts (31) are threadedly sleeved on the threaded rods (28). The plug plates (30) are clamped on the threaded rods (28) through the nuts (31).