CN220671437U

CN220671437U - Scouring measurement equipment for plant-growing concrete

Info

Publication number: CN220671437U
Application number: CN202320514424.4U
Authority: CN
Inventors: 蔡佳时; 王铭明; 崔鼎; 许广; 杨卷; 张宗亮
Original assignee: Kunming University of Science and Technology
Current assignee: Kunming University of Science and Technology
Priority date: 2023-03-16
Filing date: 2023-03-16
Publication date: 2024-03-26
Anticipated expiration: 2033-03-16

Abstract

The utility model relates to the technical field of measurement, in particular to flushing measurement equipment for plant-growing concrete, which comprises a base for measuring plant-growing concrete blocks, wherein an adjusting mechanism for adjusting the inclination angle of the plant-growing concrete blocks is arranged at the middle position of the base, a collecting mechanism matched with the adjusting mechanism for receiving the plant-growing concrete blocks is arranged at the right position of the base, a flushing mechanism corresponding to the plant-growing concrete blocks and flushing the plant-growing concrete blocks is arranged at the left position of a machine body, and a portable mechanism is arranged at the bottom of the base. According to the utility model, the left side of the plant-growing concrete block can be driven to move upwards through the adjusting mechanism, the filter frame and the filter geotextile can be moved through the pull rod, so that the subsequent drying of the scour soil collected by the filter geotextile is facilitated, and the quality of the scour soil can be measured; the device is jacked up upwards, and staff can push the device and the casters to move through the pushing frame, so that convenience in moving the device is improved.

Description

Scouring measurement equipment for plant-growing concrete

Technical Field

The utility model relates to the technical field of measurement, in particular to flushing measurement equipment for vegetation concrete.

Background

The traditional revetment engineering such as concrete revetment and masonry revetment is to forcedly isolate water and soil bank slope foundation, and the exposed revetment result is always washed and corroded by river water and rainwater, so that the original ecological balance is destroyed. The plant-growing concrete is a novel slope protection material, adopts a mode of engineering reinforcement and vegetation slope protection, has remarkable effects on maintaining the stability of the slope and recovering the ecological environment of the slope, and can meet the requirements of structural physical and mechanical properties, service functions and service life.

The method aims at solving the problems existing in the process of measuring the scouring rate of the plant-growing concrete in the prior art, namely, a worker uses a scouring tool manually to scour the plant-growing concrete, the method is high in labor intensity, a great deal of effort is wasted for the worker, and the inclination angle and the water flow velocity of the plant-growing concrete during scouring cannot be adjusted, so that the problem of larger errors between a test result and actual application is caused.

Disclosure of Invention

The utility model aims to solve the problem of inconvenient scouring measurement of plant-generated concrete in the prior art, and provides scouring measurement equipment for plant-generated concrete.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a wash away measuring equipment for plant-growing concrete, includes the base that is used for measuring plant-growing concrete piece, base middle part position is provided with adjustment plant-growing concrete piece inclination's adjustment mechanism, and base right side position be provided with adjustment mechanism cooperate in order to accept plant-growing concrete piece's collection mechanism, organism left side position is provided with the corresponding plant-growing concrete piece and wash away the mechanism that washes away it, and base bottom position is provided with portable mechanism.

Preferably, the adjusting mechanism comprises a supporting seat fixedly mounted on the base, a limit groove is formed in the top end of the supporting seat, a first motor is fixedly mounted outside the supporting seat, a screw rod fixedly connected with the output end of the first motor is movably arranged in the limit groove, an adjusting nut is sleeved on the screw rod extending out of the limit groove in a threaded manner, an adjusting frame is hinged to the top of the adjusting nut, and an adjusting plate connected with a pin shaft of the adjusting frame is arranged at the upper end of the supporting seat.

Preferably, the screw rod is horizontally rotatably installed in the limit groove through a bearing, a support frame for installing the adjusting plate through a pin shaft is fixedly installed on the support seat, and a limit rod sleeved in the adjusting nut is fixedly arranged in the limit groove.

Preferably, be provided with in the adjustment mechanism and be used for carrying out spacing fixed locating component to plant the concrete piece, and locating component is including offering the frame of placing that is arranged in the regulating plate and is used for placing the plant the concrete piece, place the frame both sides and fixedly cup jointed the locating piece, the inside screw thread of locating piece has cup jointed a screw rod, threaded connection has the splint that offsets with the plant the concrete piece on the screw rod, the last fixedly connected with revolving stage of splint, place the frame in fixedly connected with telescopic link, telescopic link output and splint fixed connection, place the guiding gutter that the frame is linked together with placing the frame is offered to the frame bottom.

Preferably, the collection mechanism comprises a collection groove arranged in the base, a filtering frame is movably sleeved in the collection groove, filtering geotechnical cloth is fixedly connected in the filtering frame, mounting blocks are integrally connected with the inner walls of the two sides of the collection groove, and magnetic sheets are fixedly connected in the mounting blocks.

Preferably, the filter frame both sides fixedly connected with pull rod, filter frame bottom fixedly connected with iron sheet, the iron sheet activity is pegged graft in the installation piece, and iron sheet bottom magnetism is connected in magnetic sheet top position.

Preferably, the flushing mechanism comprises a drainage cover positioned above the plant-growing concrete block, a drainage hole is formed in the bottom of the drainage cover, a second guide pipe is fixedly connected to the top of the drainage cover, and a water pump is fixedly connected to one end of the second guide pipe.

Preferably, the base top is fixedly provided with the water storage tank, a pipe is first to water storage tank fixedly connected with, a pipe bottom extends to the bottom of water storage tank inner chamber, a pipe top fixed connection is at the water pump end that draws water, install the electromagnetism water valve on the pipe, install the flow meter on the pipe No. two.

Preferably, the portable mechanism comprises four supporting covers fixedly arranged at the lower ends of the bases, lifting tables are arranged in the inner cavities of the four supporting covers, and casters are arranged at the bottoms of the lifting tables.

Preferably, the base bottom fixedly connected with mount, mount and supporting cover top fixed connection, supporting cover top middle part screw thread has cup jointed No. two screw rods, and supporting cover top both sides fixedly connected with No. one straight-bar, the supporting cover top is equipped with the fly leaf, fly leaf bottom middle part fixed mounting has No. two motors that are used for driving No. two screw rods rotation, no. two screw rods bottom extends to in the supporting cover, and its swivelling joint in elevating platform top position, fixedly connected with No. two straight-bars in the supporting cover, fixedly connected with slider in the elevating platform both sides, the slider activity cup joints in No. two straight-bar outer wall positions, the outer fixedly connected with of base pushes away the frame.

Compared with the prior art, the utility model has the following advantages:

1. according to the utility model, the positioning assembly is arranged, so that the plant-growing concrete blocks can be clamped between the two clamping plates conveniently, the plant-growing concrete blocks with different sizes can be fixed, the water storage tank can be conveniently sprayed on the plant-growing concrete blocks through the flushing mechanism, the plant-growing concrete blocks are subjected to flushing test, the left side of the plant-growing concrete blocks can be driven to move upwards through the adjusting mechanism, the flushing gradient of the plant-growing concrete is convenient to adjust, the flushing requirements of plant-growing concrete slope protection with different gradients can be met, the energy of workers in manually flushing the plant-growing concrete is saved, and the flushing efficiency is improved.

2. According to the utility model, through the cooperation of the collector tank, the filter frame, the pull rod, the filter geotextile, the mounting block, the iron sheet, the magnetic sheet, the drain pipe and the drain valve, sewage generated when the plant-growing concrete block is washed can be collected, the washed soil body is collected through the filter geotextile, the filter frame and the filter geotextile can be moved through the pull rod, the subsequent drying of the washed soil body collected by the filter geotextile is facilitated, and the quality of the washed soil body can be measured.

3. According to the utility model, the fixing frame, the supporting cover, the pushing frame, the first straight rod, the movable plate, the second motor, the second screw rod, the lifting table, the casters, the sliding blocks and the second straight rod are matched, so that the casters can be stably moved out of the inner cavity of the supporting cover and lifted up, and a worker can push the device and the casters to move through the pushing frame, so that the convenience of the device in moving is improved.

Drawings

FIG. 1 is a schematic diagram of a scouring measurement device for vegetation concrete according to the present utility model;

FIG. 2 is a schematic cross-sectional view of a support base structure of a washout measuring device for vegetation concrete according to the present utility model;

FIG. 3 is a schematic side view of a support frame structure of a washout measuring device for vegetation concrete according to the present utility model;

FIG. 4 is a schematic cross-sectional view of a placement frame of a scouring measurement device for vegetation concrete according to the present utility model;

FIG. 5 is a schematic cross-sectional view of a collecting mechanism of a flushing measurement device for vegetation concrete according to the present utility model;

FIG. 6 is a schematic cross-sectional view of a support housing of a scouring measurement device for vegetation concrete according to the utility model;

fig. 7 is a schematic cross-sectional view of a drain cover structure of a flushing measurement device for vegetation concrete according to the present utility model.

In the figure:

1. a base; 2. an adjusting mechanism; 21. a support base; 22. a limit groove; 23. a motor I; 24. a screw rod; 25. an adjusting nut; 26. a limit rod; 27. an adjusting frame; 28. an adjusting plate; 29. a support frame; 3. a positioning assembly; 31. placing a frame; 32. planting concrete blocks; 33. a diversion trench; 34. a first screw; 35. a positioning block; 36. a turntable; 37. a clamping plate; 38. a telescopic rod; 4. a collection mechanism; 41. a collection trough; 42. a filter frame; 43. a pull rod; 44. filtering geotextile; 45. a mounting block; 46. iron sheet; 47. a magnetic sheet; 5. a flushing mechanism; 51. a water storage tank; 52. a first catheter; 53. an electromagnetic water valve; 54. a water pump; 55. a second conduit; 56. a flow meter; 57. a drain cover; 58. a drain hole; 6. a portable mechanism; 61. a fixing frame; 62. a support cover; 63. pushing a frame; 64. a first straight rod; 65. a movable plate; 66. a motor II; 67. a second screw; 68. a lifting table; 681. a slide block; 682. a second straight rod; 69. casters.

Description of the embodiments

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-7, a flushing measurement device for use with a concrete plant, comprising a base 1 for measuring a concrete plant block 32, further described:

first, the adjustment mechanism 2 of adjustment plant-growing concrete piece 32 inclination is provided with to base 1 middle part position, specifically:

the adjusting mechanism 2 comprises a supporting seat 21 fixedly arranged on the base 1, a limit groove 22 is formed in the top end position of the supporting seat 21, a first motor 23 is fixedly arranged outside the supporting seat 21, a screw rod 24 fixedly connected with the output end of the first motor 23 is movably arranged in the limit groove 22, an adjusting nut 25 is sleeved on the screw rod 24 in a threaded manner, the top of the adjusting nut 25 is hinged with an adjusting frame 27, an adjusting plate 28 connected with the pin shaft of the adjusting frame 27 is arranged at the upper end of the supporting seat 21, the first motor 23 adopts a servo motor with the model of MR-J2S-70B, the adjusting plate 28 supports the plant-growing concrete block 32 to perform angle deflection adjustment under the driving action of the servo motor, the adjusting nut 25 can be driven to horizontally move on the outer wall of the limit rod 26 through the cooperation of the first motor 23 and the screw rod 24, the adjusting nut 25 can horizontally guide through the limit rod 26, and the adjusting nut 25 can be simultaneously jacked up through the adjusting frame 27 and the left side of the adjusting plate 28, the placing frame 31 and the plant-growing concrete block 32;

the adjusting mechanism 2 is internally provided with a positioning component 3 for limiting and fixing the plant-growing concrete blocks 32, the positioning component 3 comprises a placing frame 31 which is arranged in the adjusting plate 28 and used for placing the plant-growing concrete blocks 32, positioning blocks 35 are fixedly sleeved on two sides of the placing frame 31, first screw rods 34 are sleeved in the positioning blocks 35 in a threaded manner, clamping plates 37 which are abutted against the plant-growing concrete blocks 32 are connected to the first screw rods 34 in a threaded manner, a turntable 36 is fixedly connected to the upper parts of the clamping plates 37, telescopic rods 38 are fixedly connected to the placing frame 31, the output ends of the telescopic rods 38 are fixedly connected with the clamping plates 37, guide grooves 33 which are communicated with the placing frame 31 are formed in the bottom of the placing frame 31, and simultaneously the two first screw rods 34 are rotated, so that the two first screw rods 34 can drive the clamping plates 37 to move through the turntable 36, and meanwhile the clamping plates 37 drive the telescopic ends of the multi-section telescopic rods 38 to horizontally guide the clamping plates 37 through the multi-section telescopic rods 38;

the right side position of the base 1 is provided with a collecting mechanism 4 which is matched with the adjusting mechanism 2 to receive the plant-growing concrete blocks 32, specifically:

the collecting mechanism 4 comprises a collecting tank 41 arranged in the base 1, a filtering frame 42 is movably sleeved in the collecting tank 41, filtering geotechnical cloth 44 is fixedly connected in the filtering frame 42, mounting blocks 45 are integrally connected to the inner walls of two sides of the collecting tank 41, magnetic sheets 47 are fixedly connected in the mounting blocks 45, the iron sheets 46 can be fixed in the mounting blocks 45 through magnetic adsorption between the iron sheets 46 and the magnetic sheets 47, the filtering frame 42 is further fixed in the collecting tank 41 through the iron sheets 46, sewage generated during scouring test of the plant-growing concrete block 32 is discharged into the inner cavity of the collecting tank 41 through the guide groove 33, and soil in the sewage is filtered through the filtering geotechnical cloth 44, meanwhile, the sewage flows into the bottom of the inner cavity of the collecting tank 41 through the filtering geotechnical cloth 44, so that the sewage is conveniently collected, and then the drain valve 49 is opened so that the sewage in the inner cavity of the collecting tank 41 is conveniently discharged through one end of a drain pipe 48;

the left side position of the base 1 is provided with a scouring mechanism 5 which corresponds to the plant-growing concrete block 32 and scours the plant-growing concrete block, and the scouring mechanism is specifically as follows:

the flushing mechanism 5 comprises a drain cover 57 positioned above the plant-growing concrete block 32, a drain hole 58 is formed in the bottom of the drain cover 57, a second guide pipe 55 is fixedly connected to the top of the drain cover 57, and a water pump 54 is fixedly connected to one end of the second guide pipe 55;

the bottom position of the base 1 is provided with a portable mechanism 6, which is specifically:

the portable mechanism 6 comprises four supporting covers 62 fixedly arranged at the lower end of the base 1, lifting platforms 68 are arranged in the inner cavities of the four supporting covers 62, and casters 69 are arranged at the bottoms of the lifting platforms 68.

The screw rod 24 is horizontally and rotatably arranged in the limit groove 22 through a bearing, a supporting frame 29 for mounting the adjusting plate 28 through a pin shaft is fixedly arranged on the supporting seat 21, and a limit rod 26 which is sleeved in the adjusting nut 25 in a sliding manner is fixedly arranged in the limit groove 22.

The filter frame 42 both sides fixedly connected with pull rod 43, filter frame 42 bottom fixedly connected with iron sheet 46, iron sheet 46 activity grafting is in installation piece 45, and iron sheet 46 bottom magnetism is connected in magnetic sheet 47 top position, after carrying out the scour test to plant raw concrete piece 32, the staff can upwards pull filter frame 42 and filter geotechnique's cloth 44 through pull rod 43, filter frame 42 drives iron sheet 46 and shifts out the inside of installation piece 45 simultaneously, conveniently collect and filter geotechnique's cloth 44, the staff of being convenient for later dries the scour soil body of collecting on the filter geotechnique's cloth 44, measurable scour soil body's quality.

The water storage tank 51 is fixedly arranged at the top end of the base 1, the first guide pipe 52 is fixedly connected to the water storage tank 51, the bottom end of the first guide pipe 52 extends to the bottom of the inner cavity of the water storage tank 51, the top end of the first guide pipe 52 is fixedly connected to the water pumping end of the water pump 54, the electromagnetic water valve 53 is arranged on the first guide pipe 52, the flow meter 56 is arranged on the second guide pipe 55, water in the inner cavity of the water storage tank 51 can be pumped out through the cooperation of the first guide pipe 52, the electromagnetic water valve 53, the water pump 54 and the second guide pipe 55, meanwhile, the water flow in the second guide pipe 55 can be monitored through the flow meter 56, water is discharged into the drain cover 57 through one end of the second guide pipe 55, and is evenly sprayed on the plant-growing concrete block 32 through the plurality of drain holes 58, and a scouring test can be carried out on the plant-growing concrete block 32.

The base 1 bottom fixedly connected with mount 61, mount 61 and support cover 62 top fixed connection, support cover 62 top middle part screw thread cup joints No. two screw rods 67, and support cover 62 top both sides fixedly connected with No. one straight-bar 64, support cover 62 top is equipped with fly leaf 65, fly leaf 65 bottom middle part fixed mounting has the motor No. two 66 that is used for driving No. two screw rods 67 rotation, no. two screw rods 67 bottom extends to in the support cover 62, and its rotation is connected in elevating platform 68 top position, fixedly connected with No. two straight-bar 682 in the support cover 62, fixedly connected with slider 681 in elevating platform 68 both sides, slider 681 activity cup joints in No. two straight-bar 682 outer wall positions, base 1 fixedly connected with pushing frame 63, drive No. two screw rods 67 at the middle part spiral rotation at support cover 62 top through No. two motor 66's output, no. two screw rods 67's bottom and at elevating platform 68's top rotation, simultaneously drive slider 681 at No. two straight-bar 682's outer wall vertical slip for the stability of maintaining elevating platform 68 when moving, elevating platform 68 drives the inner chamber 69 of supporting cover 62 simultaneously, push device and jack-up device 69 can be moved by the people through the device of pushing device and jack-up, can make the convenient and convenient device when upwards moving.

The utility model can explain its functional principle by the following modes of operation:

firstly placing the plant-growing concrete block 32 in the inner cavity of the placement frame 31, and simultaneously rotating the two first screw rods 34, so that the first screw rods 34 rotate on one side of the turntable 36 and drive the clamping plates 37 to move, and clamping the plant-growing concrete block 32 between the two clamping plates 37;

the screw rod 24 is driven to rotate through the output end of the first motor 23, the screw rod 24 simultaneously drives the adjusting nut 25 and the bottom end of the adjusting frame 27 to move, the top end of the adjusting frame 27 drives the left side of the adjusting plate 28, the placing frame 31 and the plant-growing concrete block 32 to move upwards, and meanwhile, the right side of the adjusting plate 28 rotates on the outer wall of the rotating shaft 291, so that a certain inclination angle is generated among the adjusting plate 28, the placing frame 31 and the plant-growing concrete block 32;

the electromagnetic water valve 53 is opened, the water pump 54 is started, water in the water storage tank 51 is pumped out through the first conduit 52 and the second conduit 55, and meanwhile, the water is discharged into the drain cover 57 and is discharged through the plurality of drain holes 58, so that the plant-growing concrete blocks 32 are washed;

the sewage generated by flushing flows downwards into the inner cavity of the collector tank 41 through the diversion trench 33, and the soil in the sewage is filtered through the filtering geotechnical cloth 44, and meanwhile, the sewage flows into the bottom of the inner cavity of the collector tank 41 through the filtering geotechnical cloth 44, so that the sewage is collected.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a wash away measuring equipment for plant-growing concrete, includes base (1) that is used for measuring plant-growing concrete piece (32), its characterized in that, base (1) middle part position is provided with adjustment plant-growing concrete piece (32) inclination's adjustment mechanism (2), and base (1) right side position be provided with adjustment mechanism (2) matched with in order to accept collection mechanism (4) of plant-growing concrete piece (32), base (1) left side position is provided with corresponding plant-growing concrete piece (32) and wash away mechanism (5) to it, and base (1) bottom position is provided with portable mechanism (6).

2. The scouring measurement equipment for plant-growing concrete according to claim 1, characterized in that the adjusting mechanism (2) comprises a supporting seat (21) fixedly installed on the base (1), a limiting groove (22) is formed in the top end position of the supporting seat (21), a first motor (23) is fixedly installed outside the supporting seat (21), a screw rod (24) fixedly connected with the output end of the first motor (23) is movably arranged in the limiting groove (22), an adjusting nut (25) is sleeved on the screw rod (24) extending out of the limiting groove (22) in a threaded manner, an adjusting frame (27) is hinged to the top of the adjusting nut (25), and an adjusting plate (28) connected with a pin shaft of the adjusting frame (27) is arranged at the upper end of the supporting seat (21).

3. The scouring measurement equipment for plant-growing concrete according to claim 2, characterized in that the screw rod (24) is horizontally rotatably installed in the limit groove (22) through a bearing, a support frame (29) for installing the adjusting plate (28) through a pin shaft is fixedly installed on the support seat (21), and a limit rod (26) sleeved in the adjusting nut (25) in a sliding manner is fixedly arranged in the limit groove (22).

4. The scouring measurement device for plant-growing concrete according to claim 1, characterized in that a positioning component (3) for limiting and fixing the plant-growing concrete block (32) is arranged in the adjusting mechanism (2), the positioning component (3) comprises a placing frame (31) which is arranged in the adjusting plate (28) and used for placing the plant-growing concrete block (32), positioning blocks (35) are fixedly sleeved on two sides of the placing frame (31), a first screw (34) is sleeved on the inner threads of the positioning blocks (35), clamping plates (37) which are propped against the plant-growing concrete block (32) are connected on the first screw (34) in a threaded manner, a turntable (36) is fixedly connected on the clamping plates (37), a telescopic rod (38) is fixedly connected in the placing frame (31), and a guide groove (33) which is communicated with the placing frame (31) is formed in the bottom of the placing frame (31).

5. The scouring measurement equipment for vegetation concrete according to claim 1, wherein the collection mechanism (4) comprises a collection groove (41) formed in the base (1), a filter frame (42) is movably sleeved in the collection groove (41), filter geotechnical cloth (44) is fixedly connected in the filter frame (42), mounting blocks (45) are integrally connected to inner walls of two sides of the collection groove (41), and magnetic sheets (47) are fixedly connected in the mounting blocks (45).

6. The scouring measurement equipment for plant-growing concrete according to claim 5, wherein pull rods (43) are fixedly connected to two sides of the filter frame (42), an iron sheet (46) is fixedly connected to the bottom end of the filter frame (42), the iron sheet (46) is movably inserted into the mounting block (45), and the bottom of the iron sheet (46) is magnetically connected to the top end of the magnetic sheet (47).

7. The scouring measurement device for plant-growing concrete according to claim 1, wherein the scouring mechanism (5) comprises a drainage cover (57) positioned above the plant-growing concrete block (32), a drainage hole (58) is formed in the bottom of the drainage cover (57), a second conduit (55) is fixedly connected to the top of the drainage cover (57), and a water pump (54) is fixedly connected to one end of the second conduit (55).

8. The scouring measurement equipment for vegetation concrete according to claim 7, wherein a water storage tank (51) is fixedly arranged at the top end of the base (1), a first guide pipe (52) is fixedly connected to the water storage tank (51), the bottom end of the first guide pipe (52) extends to the bottom of an inner cavity of the water storage tank (51), the top end of the first guide pipe (52) is fixedly connected to a water pumping end of a water pump (54), an electromagnetic water valve (53) is arranged on the first guide pipe (52), and a flow meter (56) is arranged on the second guide pipe (55).

9. The scouring measurement equipment for plant-growing concrete according to claim 1, wherein the portable mechanism (6) comprises four supporting covers (62) fixedly arranged at the lower end of the base (1), lifting tables (68) are arranged in the inner cavities of the four supporting covers (62), and casters (69) are arranged at the bottoms of the lifting tables (68).

10. The scouring measurement device for plant-growing concrete according to claim 9, wherein the bottom end of the base (1) is fixedly connected with a fixing frame (61), the fixing frame (61) is fixedly connected with the top end of a supporting cover (62), a second screw rod (67) is sleeved at the middle part of the top end of the supporting cover (62) in a threaded manner, a first straight rod (64) is fixedly connected to two sides of the top of the supporting cover (62), a movable plate (65) is arranged above the supporting cover (62), a second motor (66) for driving the second screw rod (67) to rotate is fixedly arranged at the middle part of the bottom end of the movable plate (65), the bottom end of the second screw rod (67) extends into the supporting cover (62) and is rotatably connected to the top end position of a lifting table (68), a second screw rod (682) is fixedly connected to the inside of the supporting cover (62), a sliding block (681) is movably sleeved at the outer wall position of the second straight rod (682), and a pushing frame (63) is fixedly connected to the outside the base (1).