CN211444291U

CN211444291U - Spiral feeding machine for pipe preparation

Info

Publication number: CN211444291U
Application number: CN201921666785.0U
Authority: CN
Inventors: 尚晓民
Original assignee: Hebei Shangfang Pipe Industry Co ltd
Current assignee: Tangshan Wanhong Water Saving Technology Co ltd
Priority date: 2018-10-09
Filing date: 2019-09-30
Publication date: 2020-09-08
Anticipated expiration: 2029-09-30

Abstract

The utility model relates to the technical field of auxiliary devices for material throwing, in particular to a spiral feeding machine for pipe preparation, the transmission height of a feeding transmission device can be conveniently adjusted according to the requirements of subsequent machines, and the adaptability of the feeding transmission device is improved; the feeding condition in the working box can be conveniently observed, and the practicability is improved; the discharging angle of the feeding transmission device can be conveniently adjusted, so that the use limitation of the feeding transmission device is reduced; the automatic feeding device comprises a working box, a bracket and a base, wherein a working cavity is arranged in the working box, the top end of the working box is communicated with a feeding hole, and the right side below the working box is communicated with a feeding transmission device; the bracket comprises a cylinder, a telescopic column, a pressure plate and a return spring; the front side wall of the working box is communicated with an observation hole, and the observation hole is hermetically provided with a transparent baffle plate, and the working box also comprises a handle, a rotating shaft, a driving shaft and bristles; still include communicating pipe and intercommunication hose, still include adjusting spring group and solid fixed ring, gu be provided with the breach on the fixed ring.

Description

Spiral feeding machine for pipe preparation

Technical Field

The utility model relates to a technical field of auxiliary device is put in to the material, especially relates to a spiral material loading machine for tubular product preparation.

Background

As is well known, a spiral feeding machine for pipe preparation is an auxiliary device used for spirally and aloft feeding granular materials in the pipe preparation process so as to better perform subsequent preparation, and is widely used in the field of material feeding; the existing spiral feeding machine for preparing the pipes comprises a working box, a support and a base, wherein the working box is arranged at the top end of the support, the bottom end of the support is connected with the base, a working cavity is arranged in the working box, the top end of the working box is communicated with a feeding hole, and a feeding transmission device is communicated with the right side below the working box; when the existing spiral feeding machine for pipe preparation is used, granular materials are guided into the working box from the feeding hole and are transported to a subsequent machine through the feeding transmission device, the feeding transmission device is a common electric device in the market, and the granular materials can be used only by being electrically connected according to a purchased instruction when bought for use, so that the detailed description is omitted; the existing spiral feeding machine for pipe preparation is found that the conveying height of a feeding conveying device is fixed, and the feeding conveying device cannot be conveniently adjusted according to the requirements of subsequent machines, so that the adaptability of the feeding conveying device is poor; the feeding condition in the working box can not be conveniently observed, so that the practicability is poor; and material loading transmission device ejection of compact angle is fixed, can not conveniently adjust to lead to its use limitation higher.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a feeding and conveying device, the conveying height of which can be conveniently adjusted according to the needs of the subsequent machine, so as to improve the adaptability thereof; the feeding condition in the working box can be conveniently observed, and the practicability is improved; and material loading transmission device ejection of compact angle can conveniently adjust to reduce its spiral material loading machine for tubular product preparation that uses the limitation.

The utility model discloses a spiral feeding machine for pipe preparation, which comprises a working box, a bracket and a base, wherein a working cavity is arranged in the working box, the top end of the working box is communicated with a feeding hole, and the right side below the working box is communicated with a feeding transmission device; the support comprises an air cylinder, a telescopic column, a pressing plate and a reset spring, wherein the bottom end of the air cylinder is connected with the base, the bottom end of the telescopic column is installed at the output end of the top of the air cylinder, the pressing plate is installed at the input end of the side wall of the air cylinder, one end of the reset spring is connected with the bottom end of the pressing plate, and the other end of the reset spring is connected with the top end of the; the front side wall of the working box is communicated with an observation hole, the observation hole is hermetically provided with a transparent baffle, the working box further comprises a handle, a rotating shaft, a driving shaft and bristles, the handle is positioned on the outer side of the working box, the driving shaft and the bristles are positioned in the working cavity, one end of the rotating shaft is connected with the handle, the other end of the rotating shaft penetrates through the transparent baffle and extends into the working cavity to be connected with the driving shaft, the bristles are arranged on the driving shaft, and the bristles are tightly attached to the transparent baffle; still include communicating pipe and intercommunication hose, intercommunication hose and communicating pipe output intercommunication still include adjusting spring group and solid fixed ring, and adjusting spring group one end is connected with communicating pipe inboard, and the adjusting spring group other end is connected with solid fixed ring, is provided with the breach on the solid fixed ring, and the material loading transmission device output clamps inside solid fixed ring, and material loading transmission device and communicating pipe communicate with each other.

The utility model discloses a pipe preparation is with spiral material loading machine still includes cover spring and flexible pipe, and cover spring top and work box bottom end are connected, and the cover spring bottom is connected with flexible capital end, and flexible pipe top and work box bottom end are connected, and scalable socle end is connected with flexible capital end, and the cover spring suit is in the flexible outside of tubes.

The utility model discloses a pipe preparation is with spiral material loading machine still includes clamp splice and torque spring, and the clamp splice passes through torque spring to be installed in the front side top of work box, and the front side of tight work box is pasted to the clamp splice.

The utility model discloses a spiral material loading machine is used in tubular product preparation still includes the feeder hopper, and the feeder hopper is installed on the work box top, and feeder hopper output and work box intercommunication.

The utility model discloses a pipe preparation is with spiral material loading machine still includes the filter, and the filter is installed at the work incasement lateral wall.

The utility model discloses a spiral material loading machine is used in tubular product preparation still includes the support frame, four group's last supporting shoe, four group's supporting spring and four group's lower shoe, the support frame suit is in the cylinder outside, and the support frame is installed on the base, four group's last supporting shoe are installed respectively in work box bottom left front side, right front side, left rear side and right rear side, four group's supporting spring's top is connected with four group's last supporting shoe respectively, four group's supporting spring's bottom is connected with four group's lower shoe respectively, four group's lower shoe are all installed on the support frame top.

The utility model discloses a spiral material loading machine is used in tubular product preparation, still include four groups and go up the bradyseism pole, four groups bradyseism springs, four groups are bradyseism pole and four groups universal wheels down, four groups are gone up the bradyseism pole and are installed respectively in base bottom left front side, right front side, left rear side and right rear side, four groups bradyseism spring's one end is connected with four groups are gone up the bradyseism pole respectively, four groups bradyseism spring's the other end respectively with four groups under the bradyseism pole be connected, four groups of universal wheels are rotatable the below of installing bradyseism pole under four groups respectively, still include four groups of mounts, four groups of mounts are the suit respectively at four groups under the bradyseism pole lateral wall, and four groups of mounts tops respectively with base bottom left front side, right front side, left.

The utility model discloses a pipe preparation is with spiral material loading machine still includes four group's lead screws, four group's screw rings and four group's sucking discs, and four group's screw rings are installed respectively in base left side the place ahead and rear and base right side the place ahead and rear, and the bottom of four group's lead screws is spiral shell dress to four group's screw ring tops inside respectively and the spiral shell goes out respectively to four group's screw ring below and four group's sucking discs are connected, and four group's lead screw tops all are provided with the stopper.

Compared with the prior art, the beneficial effects of the utility model are that: the telescopic column on the cylinder can be controlled by the pressing plate to move longitudinally, so that the transmission height of the feeding transmission device can be conveniently adjusted according to the requirements of subsequent machines, the adaptive capacity of the feeding transmission device is improved, when the feeding transmission device is adjusted, the pressing plate is pressed downwards, the telescopic column moves upwards, the pressing plate is continuously pressed, the telescopic column applies force downwards, and the telescopic column moves downwards to enable the telescopic column to be recovered into the cylinder; the discharging condition in the working box can be conveniently observed through the transparent baffle, the practicability of the working box is improved, when the transparent baffle is dirty or shielded by water vapor, the handle can be rotated to drive the brush hair to clean the transparent baffle, and the practicability is further improved; and can make material loading transmission device ejection of compact angle conveniently adjust through unloading of intercommunication hose to reduce its use limitation, meanwhile, the elasticity through the extrusion spring makes things convenient for the dismouting of connecting pipe, and is more practical.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of the internal structure of the communication pipe;

FIG. 3 is an enlarged partial view of portion A of FIG. 1;

FIG. 4 is a schematic view of the construction of the transparent shield, the handle, the shaft and the shaft;

in the drawings, the reference numbers: 1. a work box; 2. a base; 3. a feeding and conveying device; 4. a cylinder; 5. a telescopic column; 6. pressing a plate; 7. a transparent baffle; 8. a handle; 9. a rotating shaft; 10. driving a shaft; 11. brushing; 12. a communicating pipe; 13. a communication hose; 14. a fixing ring; 15. a spring sleeve; 16. a telescopic tube; 17. a clamping block; 18. a feed hopper; 19. a filter plate; 20. a support frame; 21. a support spring; 22. a cushioning spring; 23. a universal wheel; 24. a fixed mount; 25. a lead screw; 26. a thread ring; 27. a suction cup; 28. and a limiting block.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1 to 4, the spiral feeding machine for pipe production of the present invention comprises a working box 1, a support and a base 2, wherein a working chamber is arranged in the working box 1, the top end of the working box 1 is provided with a feeding port, and the right side below the working box 1 is provided with a feeding transmission device 3; the support comprises an air cylinder 4, a telescopic column 5, a pressure plate 6 and a return spring, wherein the bottom end of the air cylinder 4 is connected with the base 2, the bottom end of the telescopic column 5 is installed at the output end of the top of the air cylinder 4, the pressure plate 6 is installed at the input end of the side wall of the air cylinder 4, one end of the return spring is connected with the bottom end of the pressure plate 6, and the other end of the return spring is connected with the top end of the base; the front side wall of the working box 1 is provided with an observation hole in a communicated manner, the observation hole is provided with a transparent baffle 7 in a sealed manner, the working box further comprises a handle 8, a rotating shaft 9, a driving shaft 10 and bristles 11, the handle 8 is positioned on the outer side of the working box 1, the driving shaft 10 and the bristles 11 are both positioned in a working cavity, one end of the rotating shaft 9 is connected with the handle 8, the other end of the rotating shaft 9 penetrates through the transparent baffle 7 and extends into the working cavity to be connected with the driving shaft 10, the bristles 11 are arranged on the driving shaft 10, and the bristles 11 are tightly attached to the transparent baffle 7; the feeding device comprises a communicating pipe 12, a communicating hose 13, an adjusting spring set and a fixing ring 14, wherein the communicating hose 13 is communicated with the output end of the communicating pipe 12, one end of the adjusting spring set is connected with the inner side of the communicating pipe 12, the other end of the adjusting spring set is connected with the fixing ring 14, a notch is formed in the fixing ring 14, the output end of a feeding transmission device 3 is clamped inside the fixing ring 14, and the feeding transmission device 3 is communicated with the communicating pipe 12; the telescopic column on the cylinder can be controlled by the pressing plate to move longitudinally, so that the transmission height of the feeding transmission device can be conveniently adjusted according to the requirements of subsequent machines, the adaptive capacity of the feeding transmission device is improved, when the feeding transmission device is adjusted, the pressing plate is pressed downwards, the telescopic column moves upwards, the pressing plate is continuously pressed, the telescopic column applies force downwards, and the telescopic column moves downwards to enable the telescopic column to be recovered into the cylinder; the discharging condition in the working box can be conveniently observed through the transparent baffle, the practicability of the working box is improved, when the transparent baffle is dirty or shielded by water vapor, the handle can be rotated to drive the brush hair to clean the transparent baffle, and the practicability is further improved; and can make material loading transmission device ejection of compact angle conveniently adjust through unloading of intercommunication hose to reduce its use limitation, meanwhile, the elasticity through the extrusion spring makes things convenient for the dismouting of connecting pipe, and is more practical.

The utility model discloses a pipe preparation uses spiral material loading machine, still include cover spring 15 and flexible pipe 16, the top of cover spring 15 is connected with the bottom of work box 1, the bottom of cover spring 15 is connected with the top of flexible post 5, the top of flexible pipe 16 is connected with the bottom of work box 1, the bottom of flexible pipe 16 is connected with the top of flexible post 5, cover spring 15 suit is outside flexible pipe 16; it can be through the impact to flexible post when cover spring buffering work box feeding to through the difficult distortion of telescopic tube auxiliary cover spring.

The utility model discloses a pipe preparation is with spiral material loading machine, still include clamp splice 17 and torsion spring, clamp splice 17 is installed above the front side of work box 1 through torsion spring, and clamp splice 17 pastes the front side of work box 1 closely; it can be fixed when convenient intercommunication hose is idle through the cooperation of clamp splice and work box, when fixed, breaks the clamp splice off with the fingers and thumb, arranges the intercommunication hose in between clamp splice and the work box, press from both sides to it under torsion spring's effect and adorn fixedly can.

The utility model discloses a spiral feeding machine for pipe preparation, which also comprises a feeding hopper 18, wherein the feeding hopper 18 is arranged at the top end of the working box 1, and the output end of the feeding hopper 18 is communicated with the working box 1; it can make things convenient for the feeding through the back taper design of feeder hopper, further improves the practicality.

The utility model discloses a pipe preparation uses the spiral feeder, still include the filter 19, the filter 19 is installed in the work box 1 inside wall; it can be through the great material of filter plate filter granule, and is more practical.

The utility model discloses a spiral material loading machine is used in tubular product preparation still includes support frame 20, four group's upper support blocks, four group's supporting spring 21 and four group's lower support blocks, support frame 20 suit is in the cylinder 4 outside, and support frame 20 installs on base 2, four group's upper support blocks install respectively in work box 1 bottom left front side, right front side, left rear side and right rear side, four group's supporting spring 21's top is connected with four group's upper support blocks respectively, four group's supporting spring 21's bottom is connected with four group's lower support blocks respectively, four group's lower support blocks are all installed on support frame 20 top; it can improve cylinder support stability through the support frame to through four group's supporting spring auxiliary stay, maintain the work box balanced when improving the use reliability.

The utility model discloses a pipe preparation is with spiral material loading machine, still include four groups of upper shock-absorbing poles, four groups of shock-absorbing springs 22, four groups of lower shock-absorbing poles and four groups of universal wheels 23, four groups of upper shock-absorbing poles are installed respectively in 2 bottom left front sides, right front sides, left rear side and right rear sides of base, four groups of shock-absorbing springs 22's one end is connected with four groups of upper shock-absorbing poles respectively, four groups of shock-absorbing springs 22's the other end is connected with four groups of lower shock-absorbing poles respectively, four groups of universal wheels 23 are rotatable installation respectively in four groups of lower shock-absorbing poles's below, still include four groups of mounts 24, four groups of mounts 24 are respectively nested in four groups of lower shock-absorbing poles lateral walls, and four groups of mounts 24 tops are connected with 2 bottom left front sides, right front sides, left rear sides and; it can make things convenient for the bulk motion through four universal wheels of group to when the driving face is not enough flat, can cushion through four bradyseism springs of group, so that wholly maintain the horizontality, improve its reliability, can maintain the stability of bradyseism pole under four groups through four groups of mounts moreover, improve its stability.

The utility model discloses a pipe preparation is with spiral material loading machine, still include four group's lead screws 25, four group's screw rings 26 and four group's sucking discs 27, four group's screw rings 26 are installed respectively in 2 left sides the place ahead and the rear and 2 right sides the place ahead and the rear of base, four group's lead screws 25's bottom is screw-mounted to the inside of four group's screw rings 26 top respectively and is connected with four group's sucking discs 27 to four group's screw rings 26 below the screw-out respectively, four group's lead screws 25 tops all are provided with stopper 28; it can be through the convenient stability of the cooperation of four group's lead screws, four group's thread circles and four group's sucking discs, when whole needs are stable, manual four group's lead screws of rotating downwards make four group's sucking disc bottoms be located four group's universal wheel belows to convenient stable, and when whole needs remove, manual four group's lead screws of upwards rotating make four group's sucking disc bottoms be located four group's universal wheel tops, thereby make things convenient for the moving as a whole, and more practical, four group's stopper convenience are spacing downwards to the lead screw.

The utility model discloses a spiral material loading machine for tubular product preparation, it is at the during operation, can carry out longitudinal movement through the flexible post on the clamp plate control cylinder, makes the material loading transmission device transmission height conveniently according to follow-up machine needs conveniently adjust, improves its adaptability, during the adjustment, presses down the clamp plate, flexible post moves upwards, and constantly pushes down the clamp plate and give flexible post downward application of force, flexible post moves downwards and makes flexible post retrieve inside the cylinder; the discharging condition in the working box can be conveniently observed through the transparent baffle, the practicability of the working box is improved, when the transparent baffle is dirty or shielded by water vapor, the handle can be rotated to drive the brush hair to clean the transparent baffle, and the practicability is further improved; the discharging angle of the feeding transmission device can be conveniently adjusted through the discharging of the communicating hose, so that the use limitation of the feeding transmission device is reduced, and meanwhile, the connecting pipe is convenient to disassemble and assemble through the elasticity of the extrusion spring, so that the feeding transmission device is more practical; impact on the telescopic column when the working box is fed can be buffered through the sleeve spring, and the telescopic tube is used for assisting the sleeve spring to be not easy to distort and deform; the connecting hose can be conveniently fixed when the connecting hose is idle through the matching of the clamping block and the working box, and when the connecting hose is fixed, the clamping block is broken off, the connecting hose is placed between the clamping block and the working box, and the connecting hose is clamped and fixed under the action of the torsion spring; the inverted cone design of the feed hopper can facilitate feeding, and the practicability is further improved; larger materials can be filtered through the filter plate, so that the filter plate is more practical; the support stability of the air cylinder can be improved through the support frame, and the balance of the working box is maintained while the use reliability is improved through the auxiliary support of four groups of support springs; the four universal wheels can facilitate the integral movement, and when the driving surface is not flat enough, the four shock absorption springs can absorb the shock, so that the integral horizontal state is maintained, the reliability of the shock absorption device is improved, and the four fixed frames can maintain the stability of the four lower shock absorption rods, so that the stability of the shock absorption device is improved; can be through the convenient stability of the cooperation of four group's lead screws, four group's thread circles and four group's sucking discs, when whole needs are stable, manual four group's lead screws of rotating downwards make four group's sucking disc bottoms be located four group's universal wheel belows to convenient stable, and when whole needs remove, manual four group's lead screws of upwards rotating make four group's sucking disc bottoms be located four group's universal wheel tops, thereby make things convenient for the moving as a whole, more practical, four group's stopper convenience is to the lead screw spacing of going on downwards.

The utility model discloses a spiral material loading machine is used in tubular product preparation, above the mounting means, the connected mode or the mode that sets up of all parts are common mechanical system to the concrete structure, model and the coefficient index of its all parts are its from taking the technique, as long as can reach all can implement of its beneficial effect, so do not add at much and give unnecessary details.

The utility model discloses a spiral feeding machine for tubular product preparation, under the condition that does not explain to the contrary, "about, around inside and outside and vertical level" the orientation word contained in the term only represents the position of this term under the conventional use state, or is the colloquial name that technical staff in this field understood, and should not regard as the restriction to this term, and simultaneously "first", "second" and "third" etc. are listed as the noumenon and do not represent specific quantity and order, are only used for the differentiation of name.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A spiral feeding machine for pipe preparation comprises a working box (1), a support and a base (2), wherein a working cavity is arranged in the working box (1), the top end of the working box (1) is provided with a feeding hole in a communicating manner, and the right side below the working box (1) is provided with a feeding transmission device (3) in a communicating manner; the device is characterized in that the support comprises an air cylinder (4), a telescopic column (5), a pressing plate (6) and a reset spring, the bottom end of the air cylinder (4) is connected with the base (2), the bottom end of the telescopic column (5) is installed at the top output end of the air cylinder (4), the pressing plate (6) is installed at the side wall input end of the air cylinder (4), one end of the reset spring is connected with the bottom end of the pressing plate (6), and the other end of the reset spring is connected with the top end of the base (2); the front side wall of the working box (1) is communicated with an observation hole, a transparent baffle (7) is arranged at the observation hole in a sealing manner, the working box further comprises a handle (8), a rotating shaft (9), a driving shaft (10) and bristles (11), the handle (8) is positioned on the outer side of the working box (1), the driving shaft (10) and the bristles (11) are both positioned in the working cavity, one end of the rotating shaft (9) is connected with the handle (8), the other end of the rotating shaft (9) penetrates through the transparent baffle (7) and extends into the working cavity to be connected with the driving shaft (10), the bristles (11) are installed on the driving shaft (10), and the bristles (11) are tightly attached to the transparent baffle (7); the feeding device comprises a feeding conveying device and is characterized by further comprising a communicating pipe (12) and a communicating hose (13), wherein the communicating hose (13) is communicated with the output end of the communicating pipe (12), the feeding conveying device further comprises an adjusting spring group and a fixing ring (14), one end of the adjusting spring group is connected with the inner side of the communicating pipe (12), the other end of the adjusting spring group is connected with the fixing ring (14), a notch is formed in the fixing ring (14), the output end of the feeding conveying device (3) is clamped inside the fixing ring (14), and the feeding conveying device (3) is communicated with the communicating pipe (12.

2. The spiral feeder for pipe preparation according to claim 1, further comprising a casing spring (15) and a telescopic pipe (16), wherein the top end of the casing spring (15) is connected with the bottom end of the working box (1), the bottom end of the casing spring (15) is connected with the top end of the telescopic column (5), the top end of the telescopic pipe (16) is connected with the bottom end of the working box (1), the bottom end of the telescopic pipe (16) is connected with the top end of the telescopic column (5), and the casing spring (15) is sleeved outside the telescopic pipe (16).

3. The screw feeder for pipe preparation according to claim 2, further comprising a clamping block (17) and a torsion spring, wherein the clamping block (17) is mounted above the front side of the work box (1) by the torsion spring, and the clamping block (17) abuts against the front side of the work box (1).

4. The spiral feeder for pipe preparation as claimed in claim 3, further comprising a feed hopper (18), wherein the feed hopper (18) is installed at the top end of the working box (1), and the output end of the feed hopper (18) is communicated with the working box (1).

5. The screw feeder for pipe production according to claim 4, further comprising a filter plate (19), wherein the filter plate (19) is installed on the inner side wall of the work box (1).

6. The spiral feeder for pipe preparation as claimed in claim 5, further comprising a support frame (20), four sets of upper support blocks, four sets of support springs (21) and four sets of lower support blocks, wherein the support frame (20) is sleeved outside the cylinder (4), the support frame (20) is installed on the base (2), the four sets of upper support blocks are respectively installed on the left front side, the right front side, the left rear side and the right rear side of the bottom end of the work box (1), the top ends of the four sets of support springs (21) are respectively connected with the four sets of upper support blocks, the bottom ends of the four sets of support springs (21) are respectively connected with the four sets of lower support blocks, and the four sets of lower support blocks are all installed on the top end of the support frame (20).

7. The spiral feeding machine for pipe preparation as claimed in claim 6, further comprising four groups of upper shock absorption rods, four groups of shock absorption springs (22), four groups of lower shock absorption rods and four groups of universal wheels (23), wherein the four groups of upper shock absorption rods are respectively installed at the left front side, the right front side, the left rear side and the right rear side of the bottom end of the base (2), one ends of the four groups of shock absorption springs (22) are respectively connected with the four groups of upper shock absorption rods, the other ends of the four groups of shock absorption springs (22) are respectively connected with the four groups of lower shock absorption rods, the four groups of universal wheels (23) are respectively rotatably installed below the four groups of lower shock absorption rods, and further comprising four groups of fixing frames (24), the four groups of fixing frames (24) are respectively sleeved on the outer side walls of the four groups of lower shock absorption rods, and the top ends of the four groups of fixing frames (24) are respectively connected with the left front side, the right front side.

8. The spiral feeder for pipe preparation as claimed in claim 7, further comprising four sets of screw rods (25), four sets of screw rings (26) and four sets of suckers (27), wherein the four sets of screw rings (26) are respectively installed in front of and behind the left side of the base (2) and in front of and behind the right side of the base (2), the bottom ends of the four sets of screw rods (25) are respectively screwed into the top ends of the four sets of screw rings (26) and are respectively screwed out to the lower sides of the four sets of screw rings (26) to be connected with the four sets of suckers (27), and the top ends of the four sets of screw rods (25) are respectively provided with a limiting block (28).