CN109201664B

CN109201664B - Soil sample is erlenmeyer flask cleaning device

Info

Publication number: CN109201664B
Application number: CN201811024513.0A
Authority: CN
Inventors: 许衍磊; 郑兆余
Original assignee: Individual
Current assignee: Rizhao Fangyuan Machinery Technology Co ltd
Priority date: 2018-09-04
Filing date: 2018-09-04
Publication date: 2021-02-02
Anticipated expiration: 2038-09-04
Also published as: CN112871918A; CN112605082A; CN109201664A

Abstract

The invention discloses a soil sample conical flask cleaning device, which belongs to the technical field of experimental instrument cleaning devices and is characterized in that: two ends of the first rotating shaft respectively penetrate through the elongated through holes on the side wall of the first support frame and are rotatably connected with two side walls of the second support frame through bearings; the side plate on one side of the second support frame is connected with a screw nut, the side plate on the other side of the second support frame is connected with a guide block, the two screw nuts are respectively matched with a first bidirectional screw, two first ear plates on the other side of the first support frame are connected through a first guide rod, and the first guide rod penetrates through guide holes of the two guide blocks; the two second supporting frames are respectively connected with the first guide plate through the first connecting plate, two second guide rods are arranged at the lower end of the first guide plate, and the second guide rods are inserted into guide holes of the second guide plate. Compared with the prior art have simple structure, reasonable in design's characteristics.

Description

Soil sample is erlenmeyer flask cleaning device

Technical Field

The invention relates to a soil sample conical flask cleaning device, in particular to a device suitable for cleaning the inner walls of conical flasks with different sizes.

Background

In the soil sample agricultural chemical analysis, a conical flask is often used for processing the soil sample to determine the analysis of soil moisture, physical properties, chemical properties and pH value. Due to the complex soil composition. Due to the special shape of the conical flask, the mouth is small, the bottom is large, a simple brush cannot be thoroughly cleaned, and biological or substance residues are easily caused, so that the detection in the next step is influenced, and the accuracy is damaged. Because no proper tool is available, the annular brush can only be used for cleaning, and because the bottle body is narrow and wide, the diameter of the brush needs to be small and the brush body needs to be soft in order to ensure that the brush can enter, the brush can be fully deformed and enter, but the bottom of the bottle is difficult to brush after entering. Therefore, only bottom cleaning requires sufficient soaking and cleaning by water flushing. At present, ultrasonic wave-soapy water is firstly taken for more than 5 minutes in a conical flask cleaning mode; and then soaking the bottle body for 24 hours by using 5% (V/V) nitric acid or hydrochloric acid, if the bottle body cannot be cleaned, performing secondary or multiple treatment by using a potassium dichromate washing solution, cleaning the bottle mouth by using a brush after no visual attachment exists, and repeatedly washing the bottle mouth by using flowing water. These corrosive treatments have the following drawbacks: the method takes time: 1-2 days are needed; ② labor-consuming: repeated fishing and acid corrosion are involved, which is dangerous; high cost: a variety of lotions and devices are required.

Disclosure of Invention

The technical task of the present invention is to provide a device suitable for cleaning the inner walls of erlenmeyer flasks of different sizes, in order to overcome the above disadvantages of the prior art.

The technical scheme for solving the technical problem is as follows: the utility model provides a erlenmeyer flask cleaning device for soil sample which characterized in that: the device comprises a first support frame, a first bidirectional screw rod, a first guide rod, a second support frame, a wiping strip, a winding wheel, an outer sleeve and an inner sleeve; the first support frame is provided with a cavity with an opening at the upper end and the lower end, two side walls of the first support frame are respectively provided with a strip-shaped through hole, two winding wheels are symmetrically arranged in the cavity of the first support frame, a central hole of each winding wheel is fixedly connected with the first rotating shaft, and two ends of the first rotating shaft respectively penetrate through the strip-shaped through holes in the side walls of the first support frame to be rotatably connected with two side walls of the second support frame through bearings; the side plate on one side of the second support frame is connected with the screw nut, the side plate on the other side of the second support frame is connected with the guide block, and the guide block is provided with a guide hole; the two ends of the two sides of the first support frame are respectively provided with a first lug plate, the two first lug plates on one side of the first support frame are rotationally linked with a first bidirectional screw rod through a bearing, two screw rod nuts are respectively matched with the first bidirectional screw rod, the two first lug plates on the other side of the first support frame are connected through a first guide rod, and the first guide rod penetrates through guide holes of the two guide blocks; the two second support frames are respectively connected with the first guide plate through a first connecting plate, two second guide rods are arranged at the lower end of the first guide plate, two guide holes are formed in the upper end of the second guide plate, and the second guide rods are inserted into the guide holes of the second guide plate; the lower end of the second guide plate is hinged with the upper end of the telescopic rod and the outer end of the hinged plate, the lower end of the telescopic rod is connected with a third support frame, two side plates of the third support frame are rotatably connected with the first idler wheels through bearings, the left end of the wiping strip is wound on the left winding wheel, and the right end of the wiping strip is wound on the right winding wheel by bypassing the two telescopic rods and the two first idler wheels; the telescopic rod comprises an outer barrel, an inner rod and a first compression spring, the outer barrel is provided with a cavity with an opening at the lower end, the upper end of the inner rod is inserted into the cavity of the outer barrel, the upper end of the inner rod is connected with the bottom wall of the outer barrel through the first compression spring, and the lower end of the inner rod is connected with a third support frame; the upper end of the second support frame is provided with two support plates, a through hole is formed in each support plate, a winding wheel is arranged between the two support plates, a center hole of the winding wheel is fixedly connected with a second rotating shaft, one end of the second rotating shaft is rotatably connected with the through hole of one support plate through a bearing, the other end of the second rotating shaft penetrates through the through hole in the support plate on the other side and is fixedly connected with the center hole of the positioning wheel, and the positioning wheel is provided with a plurality of positioning teeth which are uniformly arranged in a circumferential shape; the outer supporting plate is provided with a baffle plate, the baffle plate is provided with a through hole, the upper end of the positioning shaft is provided with a positioning groove, the upper end of the positioning shaft penetrates through the through hole on the baffle plate, the lower end of the positioning shaft is connected with the pull rod, the positioning shaft is provided with a shaft collar, the shaft collar of the positioning shaft is connected with the baffle plate through a second compression spring, and the second compression spring enables the positioning teeth to be embedded in the positioning groove of the positioning shaft; the winding wheel is wound with a traction wire, the upper end of the outer cylinder is provided with a through hole communicated with the cavity, one end of the traction wire is fixedly connected with the winding wheel, the other end of the traction wire penetrates through the through hole of the outer cylinder to be connected with the upper end of the inner rod, and the traction wire is wound on the winding wheel; the inner end of the hinged plate is connected with the outer end of a third guide rod, two ends of the third guide plate are respectively provided with a guide hole, the inner end of the third guide rod is inserted into the guide hole of the third guide plate, and the middle position of the third guide plate is provided with a threaded hole; a fixing plate is arranged in the middle of the first support frame, two ends of the fixing plate are fixedly connected with two side plates of the first support frame respectively, a through hole is formed in the fixing plate, the upper end of the outer sleeve is rotatably connected with the through hole of the fixing plate through a bearing, external threads are formed in the outer wall of the outer sleeve, and the outer sleeve is matched with a threaded hole of the third guide plate; the outer cylinders of the two telescopic rods are respectively hinged with the outer end of a connecting rod, the inner ends of the two connecting rods are hinged with the outer wall of a guide sleeve, a through hole is formed in the guide sleeve, the lower end of an inner sleeve penetrates through a cylinder cavity of an outer sleeve and the through hole of the guide sleeve, two shaft rings are arranged at the lower end of the inner sleeve, and the guide sleeve is located between the two shaft rings; a sixth support frame is arranged in the middle of the upper end of the first support frame, a threaded through hole is formed in an upper end plate of the sixth support frame, a section of external thread is formed in the upper end of the inner sleeve, and the upper end of the inner sleeve is in threaded connection with the threaded through hole of the upper end plate of the sixth support frame; the upper end of the outer sleeve is fixedly connected with a central hole of the worm wheel, one end of the worm is rotatably connected with one side wall of the sixth supporting frame through a bearing, and the other end of the worm penetrates through the other side wall to be connected with the handle; the first support frame is connected with a handle, and the two side plates of the second support frame are connected through a placing plate.

Compared with the prior art, the invention has the following outstanding beneficial effects:

1. the cleaning device can be used for cleaning conical bottles with different sizes, and the cleaning strip can be conveniently placed into the cavity of the conical bottle;

2. the inner wall is fully cleaned without repeated soaking, so that the cleaning time is saved;

3. the inner wall is effectively brushed, so that washing liquid such as potassium dichromate washing liquid which pollutes the environment can be avoided;

4. the strip of cleaning is for dismantling the replacement consumptive material, can scrub a large amount of sample erlenmeyer flasks after disposable the input, and the material resources of using manpower sparingly (lotion and water) realize overall cost reduction.

Drawings

Fig. 1 is a schematic structural view of embodiment 1 of the present invention.

Fig. 2 is a top view of the present invention in example 1 with the handle portion removed.

Fig. 3 is a partially enlarged view of a portion a in fig. 1.

Fig. 4 is a schematic view of the internal structure of the telescopic rod portion in embodiment 1 of the present invention.

Fig. 5 is a plan view of a telescopic rod portion in embodiment 1 of the present invention.

Fig. 6 is a schematic structural view of embodiment 2 of the present invention.

Fig. 7 is a top view of the present invention, with the handle portion removed, in example 2.

Fig. 8 is a schematic structural view of embodiment 3 of the present invention.

Fig. 9 is a partially enlarged view of a portion B in fig. 8.

Detailed Description

The invention is further described with reference to the drawings and the detailed description. For convenience of description, the center line of fig. 1 is divided into inner and outer portions, the center line is oriented inward, and the other direction is oriented outward.

As shown in FIGS. 1 to 5, the invention comprises a first support frame 8, a first bidirectional screw 9, a first guide rod 38, a second support frame 25, a wiping strip 4, a winding wheel 11, a winding wheel 15, an outer sleeve 20 and an inner sleeve 32.

The first support frame 8 is provided with a cavity with an upper end and a lower end being opened, two side walls of the first support frame 8 are respectively provided with a strip-shaped through hole, two winding wheels 11 are symmetrically arranged in the cavity of the first support frame 8, a center hole of each winding wheel 11 is fixedly connected with a first rotating shaft, and two ends of each first rotating shaft respectively penetrate through the strip-shaped through holes in the side wall of the first support frame 8 to be rotatably connected with two side walls of the second support frame 25 through bearings. The side plate on one side of the second support frame 25 is connected with the screw nut 10, the side plate on the other side is connected with the guide block 39, and the guide block 39 is provided with a guide hole.

The two ends of the two sides of the first support frame 8 are respectively provided with a first ear plate, the two first ear plates on one side of the first support frame 8 are rotationally connected with the first bidirectional screw 9 through bearings, the two screw nuts 10 are respectively matched with the first bidirectional screw 9, the two first ear plates on the other side of the first support frame 8 are connected through a first guide rod 38, and the first guide rod 38 penetrates through guide holes of the two guide blocks 39.

In an optimized scheme, a rotating sleeve 24 is arranged at the middle position of the first bidirectional screw 9, so that the first bidirectional screw 9 can be conveniently rotated.

The two second supporting frames 25 are respectively connected with the first guide plate 30 through the first connecting plate, the lower end of the first guide plate 30 is provided with two second guide rods 23, the upper end of the second guide plate 7 is provided with two guide holes, and the second guide rods 23 are inserted into the guide holes of the second guide plate 7. The lower extreme of second deflector 7 and the upper end of telescopic link and the outer end of articulated slab 6 articulated, the lower extreme and the third support frame 1 of telescopic link be connected, the both sides board of third support frame 1 between rotate with first gyro wheel 41 through the bearing and be connected, the left end winding of wiping strip 4 on left winding wheel 11, the right-hand member is walked around two telescopic links and two first gyro wheels 41 winding on the winding wheel 11 on right side.

In the optimized scheme, two ends of the wiping strip 4 are respectively fixed on the winding wheel 11 through the fastening tapes.

The telescopic rod comprises an outer barrel 3, an inner rod 2 and a first compression spring 40, the outer barrel 3 is provided with a cavity with an opening at the lower end, the upper end of the inner rod 2 is inserted into the cavity of the outer barrel 3, the upper end of the inner rod 2 is connected with the bottom wall of the outer barrel 3 through the first compression spring 40, and the lower end of the inner rod 2 is connected with a third support frame 1.

Second support frame 25's upper end be equipped with two backup pads, the backup pad on be equipped with a through-hole, be equipped with take-up pulley 15 between two backup pads, take-up pulley 15's centre bore and second axis of rotation fixed connection, the one end of second axis of rotation passes through the bearing with the through-hole of a backup pad and rotates and be connected, the other end passes the through-hole in the backup pad of opposite side and the centre bore fixed connection of locating wheel 14, locating wheel 14 on be equipped with a plurality of locating teeth that are circumference shape align to grid. The utility model discloses a location axle 12, including the backup pad in the outside, the backup pad in the outside on be equipped with the baffle, the baffle on be equipped with a through-hole, the upper end of location axle 12 be equipped with the constant head tank, the upper end of location axle 12 pass the through-hole on the baffle, the lower extreme is connected with the pull rod, location axle 12 on be equipped with a shaft collar, be connected through second compression spring 13 between the shaft collar of location axle 12 and the baffle, second compression spring 13 makes the location tooth inlay in the constant head tank of location axle 12.

In an optimized scheme, the second rotating shaft is connected with the rocker 34, so that the winding wheel can be conveniently rotated.

The winding wheel 15 is wound with a traction wire, the upper end of the outer barrel 3 is provided with a through hole communicated with the cavity, one end of the traction wire is fixedly connected with the winding wheel 15, the other end of the traction wire penetrates through the through hole of the outer barrel 3 to be connected with the upper end of the inner rod 2, and the traction wire is wound on the winding wheel 15.

The inner end of the hinged plate 6 is connected with the outer end of a third guide rod 22, guide holes are respectively formed in two ends of the third guide plate 21, the inner end of the third guide rod 22 is inserted into the guide holes of the third guide plate 21, and a threaded hole is formed in the middle of the third guide plate 21. The middle position of the first support frame 8 is provided with a fixing plate, two ends of the fixing plate are respectively fixedly connected with two side plates of the first support frame 8, the fixing plate is provided with a through hole, the upper end of the outer sleeve 20 is rotatably connected with the through hole of the fixing plate through a bearing, the outer wall of the outer sleeve 20 is provided with external threads, and the outer sleeve 20 is matched with the threaded hole of the third guide plate 21.

The outer tube 3 of two telescopic links is articulated with the outer end of a connecting rod 5 respectively, and the inner of two connecting rods 5 is articulated with the outer wall of guide sleeve 19, guide sleeve 19 on be equipped with the through-hole, the lower extreme of inner skleeve 32 pass the section of thick bamboo chamber of outer sleeve 20 and the through-hole of guide sleeve 19, the lower extreme of inner skleeve 32 be equipped with the two axle collars, guide sleeve 19 be located between the two axle collars. The middle position of the upper end of the first support frame 8 is provided with a sixth support frame 44, the upper end plate of the sixth support frame 44 is provided with a threaded through hole, the upper end of the inner sleeve 32 is provided with a section of external thread, and the upper end of the inner sleeve 32 is in threaded connection with the threaded through hole of the upper end plate of the sixth support frame 44. The upper end of the inner sleeve 32 is connected to a turn disc 33.

The upper end of the outer sleeve 20 is fixedly connected with the central hole of the worm wheel 26, one end of the worm 31 is rotatably connected with one side wall of the sixth supporting frame 44 through a bearing, and the other end passes through the other side wall and is connected with the handle 50.

The first support frame 8 is connected with a handle 16, and two side plates of the second support frame 25 are connected through a placing plate 27.

The operation flow is as follows: when the device is used, the rotating disc 33 is rotated to enable the inner sleeve 32 to rotate and drive the guide sleeve 19 to move, the guide sleeve 19 drives the two telescopic rods to rotate through the connecting rod, the two telescopic rods are enabled to be parallel to the outer sleeve 20, the wiping strips of the device are placed on two sides of the same diameter of the conical bottle opening, the reciprocating screw rod is rotated to adjust the distance between the two winding wheels 11, the wiping strips 4 are attached to two sides of the inner wall of the conical bottle, the worm 31 is rotated to drive the worm wheel 26 to rotate, the worm wheel 26 drives the outer sleeve 20 to rotate, the outer sleeve 20 drives the third guide plate 21 to move, and therefore the distance between the first guide plate 30 and the second guide plate 7 can be adjusted, and conical bottles with different lengths of long-neck tubes can be adapted. Insert two telescopic links in the cavity of erlenmeyer flask, rotate inner skleeve 32, inner skleeve 32 drives two telescopic links through guide sleeve 19 and two connecting rods 5 and rotates to make the telescopic link will clean strip 4 and hug closely on the inner wall of erlenmeyer flask, the pull rod is pulled down, will fix a position 12 of axle extract from the location tooth, make the telescopic link extension touch the diapire of erlenmeyer flask. The device is rotated to clean the inner wall of the conical flask. The cleaning strip can be replaced, can be specifically selected according to the application of the conical flask to be cleaned, can be made of sponge strips, non-woven fabrics, brushes, chemical fiber materials or high polymer materials, and aims to scrub, clean or clean the inner wall.

It should be noted that while the invention has been described in detail with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various obvious changes can be made therein without departing from the spirit and scope of the invention.

In the embodiment 1, the device needs to be manually centered, so that the wiping strips 4 are placed on two sides of the conical bottle mouth with the same diameter, and the operation is complicated. As shown in fig. 6 and 7, in embodiment 2, two ends of two sides of the first support frame 8 are respectively provided with a second ear plate, two second ear plates on one side of the first support frame 8 are rotatably connected with the second bidirectional screw 52 through bearings, two second ear plates on the other side of the first support frame 8 are connected through a fifth guide rod 55, two sets of second connecting plates 53 are respectively provided on two sides of the first support frame 8, upper ends of the two second connecting plates 53 on one side of the first support frame 8 are provided with threaded holes, the threaded holes of the two second connecting plates 53 on one side of the first support frame 8 are in threaded fit with two ends of the second bidirectional screw 52, upper ends of the two second connecting plates 53 on the other side are provided with guide holes, the fifth guide rod 55 passes through the guide holes on the two second connecting plates 53 on the other side of the first support frame 8, the second connecting plates 53 on two sides of the first support frame 8 are connected through a V-shaped clamping plate 54, the two V-shaped clamping plates 54 are oppositely arranged. Rotation of the second lead screw 52 causes the two V-shaped jaws 54 to grip the cylindrical neck of the erlenmeyer flask, thereby automatically placing the wiper strip 4 on both sides of the same diameter of the erlenmeyer flask.

One end of the second bidirectional screw 52 is connected with the rotary handle 51.

In the embodiment 1, the wiping strip 4 between the two telescopic rods is not fixed by a device, so that a gap is easily generated between the wiping strip and the bottom of the conical flask, and the cleaning cannot be realized. In embodiment 3, as shown in fig. 8 and 9, the lower end of the central shaft 28 passes through the cylinder cavity of the inner sleeve 32 and is connected to the fourth support frame 18, two side walls of the fourth support frame 18 are hinged to the middle of the telescopic cylinder 17, two ends of the telescopic cylinder 17 are rotatably connected to the second roller 42 through bearings, a torsion spring is installed at the hinged position of the fourth support frame 18 and the telescopic cylinder 17, one end of the torsion spring is connected to the telescopic cylinder 17, the other end of the torsion spring is connected to the fourth support frame 18, and the torsion spring makes the fourth support frame 18 perpendicular to the telescopic cylinder 17 in a state of not receiving torsion force.

Sixth support frame 44 on be connected with seventh support frame 56, be equipped with a through-hole on the up end plate of seventh support frame 56, the both sides of the through-hole of the up end plate of seventh support frame 56 be equipped with a blind hole respectively, the blind hole in be equipped with a positioning pin 49, positioning pin 49's outer end be connected with the blind hole diapire through third compression spring 48, the upper end of blind hole is equipped with a rectangle slide, the lower extreme of fourth deflector 46 passes the rectangle slide and is connected with positioning pin 49, positioning pin 49's the inner be equipped with an inclined plane, the inclined plane towards below. The upper end plate of the seventh supporting frame 56 is provided with an annular chute, the area of the opening of the annular chute is smaller than the area of the bottom of the chute, and the axis of the annular chute is coaxial with the through hole of the upper end plate. Seventh support frame 56's upper end be equipped with one and press cap 36, press cap 36 to be the cylindrical shell structure of lower extreme opening, the notch that passes annular spout according to cap 36's lower extreme is connected with ring 47, the upper end wall of the cylindrical cavity according to cap 36 on be equipped with a cone 45, fourth deflector 46's upper end top on cone 45, the upper end of center pin be equipped with the chamfer, be equipped with the constant head tank that two symmetric distributions on the center pin, positioning pin 49 insert in the constant head tank of center pin, be equipped with arm-tie 35 on the center pin, arm-tie 35 and seventh support frame 56 between be connected through fourth compression spring 29.

Two support plates 43 are arranged between two side plates of the seventh support frame 56, guide holes are formed in the support plates 43, a fourth guide rod 37 is arranged at each of two ends of the pulling plate 35, and the upper end of the fourth guide rod 37 penetrates through the guide holes in the support plates 43. The pressing cap 36 is pressed, the conical head 45 moves downwards, the conical head 45 drives the fourth guide plate 46 to move outwards, the fourth guide plate 46 drives the positioning pin shaft 49 to move outwards, the positioning pin shaft 49 is pulled out of the positioning groove of the central shaft, the fourth compression spring 29 expands, and the telescopic cylinder 17 and the second roller 42 are pressed on the wiping strip 4.

Claims

1. The utility model provides a erlenmeyer flask cleaning device for soil sample which characterized in that: the device comprises a first support frame, a first bidirectional screw rod, a first guide rod, a second support frame, a wiping strip, a winding wheel, an outer sleeve and an inner sleeve; the first support frame is provided with a cavity with an opening at the upper end and the lower end, two side walls of the first support frame are respectively provided with a strip-shaped through hole, two winding wheels are symmetrically arranged in the cavity of the first support frame, a central hole of each winding wheel is fixedly connected with the first rotating shaft, and two ends of the first rotating shaft respectively penetrate through the strip-shaped through holes in the side walls of the first support frame to be rotatably connected with two side walls of the second support frame through bearings; the side plate on one side of the second support frame is connected with the screw nut, the side plate on the other side of the second support frame is connected with the guide block, and the guide block is provided with a guide hole; the two ends of the two sides of the first support frame are respectively provided with a first lug plate, the two first lug plates on one side of the first support frame are rotationally linked with a first bidirectional screw rod through a bearing, two screw rod nuts are respectively matched with the first bidirectional screw rod, the two first lug plates on the other side of the first support frame are connected through a first guide rod, and the first guide rod penetrates through guide holes of the two guide blocks; the two second support frames are respectively connected with the first guide plate through a first connecting plate, two second guide rods are arranged at the lower end of the first guide plate, two guide holes are formed in the upper end of the second guide plate, and the second guide rods are inserted into the guide holes of the second guide plate; the lower end of the second guide plate is hinged with the upper end of the telescopic rod and the outer end of the hinged plate, the lower end of the telescopic rod is connected with a third support frame, two side plates of the third support frame are rotatably connected with the first idler wheels through bearings, the left end of the wiping strip is wound on the left winding wheel, and the right end of the wiping strip is wound on the right winding wheel by bypassing the two telescopic rods and the two first idler wheels; the telescopic rod comprises an outer barrel, an inner rod and a first compression spring, the outer barrel is provided with a cavity with an opening at the lower end, the upper end of the inner rod is inserted into the cavity of the outer barrel, the upper end of the inner rod is connected with the bottom wall of the outer barrel through the first compression spring, and the lower end of the inner rod is connected with a third support frame; the upper end of the second support frame is provided with two support plates, a through hole is formed in each support plate, a winding wheel is arranged between the two support plates, a center hole of the winding wheel is fixedly connected with a second rotating shaft, one end of the second rotating shaft is rotatably connected with the through hole of one support plate through a bearing, the other end of the second rotating shaft penetrates through the through hole in the support plate on the other side and is fixedly connected with the center hole of the positioning wheel, and the positioning wheel is provided with a plurality of positioning teeth which are uniformly arranged in a circumferential shape; the outer supporting plate is provided with a baffle plate, the baffle plate is provided with a through hole, the upper end of the positioning shaft is provided with a positioning groove, the upper end of the positioning shaft penetrates through the through hole on the baffle plate, the lower end of the positioning shaft is connected with the pull rod, the positioning shaft is provided with a shaft collar, the shaft collar of the positioning shaft is connected with the baffle plate through a second compression spring, and the second compression spring enables the positioning teeth to be embedded in the positioning groove of the positioning shaft; the winding wheel is wound with a traction wire, the upper end of the outer cylinder is provided with a through hole communicated with the cavity, one end of the traction wire is fixedly connected with the winding wheel, the other end of the traction wire penetrates through the through hole of the outer cylinder to be connected with the upper end of the inner rod, and the traction wire is wound on the winding wheel; the inner end of the hinged plate is connected with the outer end of a third guide rod, two ends of the third guide plate are respectively provided with a guide hole, the inner end of the third guide rod is inserted into the guide hole of the third guide plate, and the middle position of the third guide plate is provided with a threaded hole; a fixing plate is arranged in the middle of the first support frame, two ends of the fixing plate are fixedly connected with two side plates of the first support frame respectively, a through hole is formed in the fixing plate, the upper end of the outer sleeve is rotatably connected with the through hole of the fixing plate through a bearing, external threads are formed in the outer wall of the outer sleeve, and the outer sleeve is matched with a threaded hole of the third guide plate; the outer cylinders of the two telescopic rods are respectively hinged with the outer end of a connecting rod, the inner ends of the two connecting rods are hinged with the outer wall of a guide sleeve, a through hole is formed in the guide sleeve, the lower end of an inner sleeve penetrates through a cylinder cavity of an outer sleeve and the through hole of the guide sleeve, two shaft rings are arranged at the lower end of the inner sleeve, and the guide sleeve is located between the two shaft rings; a sixth support frame is arranged in the middle of the upper end of the first support frame, a threaded through hole is formed in an upper end plate of the sixth support frame, a section of external thread is formed in the upper end of the inner sleeve, and the upper end of the inner sleeve is in threaded connection with the threaded through hole of the upper end plate of the sixth support frame; the upper end of the outer sleeve is fixedly connected with a central hole of the worm wheel, one end of the worm is rotatably connected with one side wall of the sixth supporting frame through a bearing, and the other end of the worm penetrates through the other side wall to be connected with the handle; the first support frame is connected with a handle, and the two side plates of the second support frame are connected through a placing plate.