A concrete slump detection device for engineering testing

Abstract

The invention relates to the technical field of concrete testing equipment, and in particular to a concrete slump testing equipment for engineering testing. In view of the fact that existing testing equipment requires manual compaction operation after filling, a concrete slump testing equipment for engineering testing is provided, comprising a bottom plate, an operating table and a top cover are arranged on the bottom plate, a compaction rod is arranged at the lower end of the top cover, a rotatable active spur gear is arranged at the lower end of the top cover, and the rotation of the active spur gear can form a structure in which the compaction rod moves intermittently in a circular motion while deflecting up and down; a plurality of sealing panels are arranged at the upper end of the operating table, a matching funnel and a billiard ball are arranged at the lower end of the operating table, a supporting plate which can move up and down is arranged at the upper end of the bottom plate, the supporting plate moving upward can form a structure in which the sealing panel moves outward and opens, and the supporting plate moving downward can form a structure in which the billiard ball swings and continuously knocks on the funnel; the compaction can be replaced by manual compaction after filling, and the unloading and recycling can make the recycling bucket accurately located at the drop opening to prevent concrete from adhering to the inner wall of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of concrete detection equipment, in particular to a concrete slump detection equipment for engineering detection. Background Art

[0002] Concrete slump mainly reflects the plasticization and pumpability of concrete. The main factors affecting concrete slump include raw materials, mixing time, transportation machinery, pouring speed, pouring time, etc. In addition, the amount of additives and the easily overlooked cement temperature will also affect the index; concrete slump refers to the workability of concrete, specifically to ensure the normal progress of construction, including the water retention, fluidity and cohesion of concrete. The current concrete slump detection equipment still has certain defects, such as the publication number: CN111830245A, the name: a concrete slump detection equipment for engineering detection, although it solves the problem of improving the accuracy of the experiment, it still needs manual operation when tamping after filling, and it is inconvenient to collect the concrete after the experiment. When the recycling bucket cannot be accurately placed at the lower end of the prism, it is easy to cause concrete leakage, and the inner wall of the prism is easy to adhere to concrete, resulting in incomplete recycling; for this reason, a concrete slump detection equipment for engineering detection is designed to solve the above-mentioned problems. Summary of the invention

[0003] The present invention aims at the fact that existing detection equipment requires manual tamping operation after filling, there is a risk of concrete leakage during the recycling process, and the inner wall of the prism will adhere to the concrete and the recycling is not complete. The present invention provides a concrete slump detection equipment for engineering detection, which can automatically replace the manual tamping operation after filling, and in the unloading and recycling process, the recycling bucket can be accurately placed at the drop port, preventing concrete leakage and concrete adhesion to the inner wall of the equipment, reducing equipment pollution and improving the recovery rate, effectively solving the problems mentioned in the above-mentioned background technology.

[0004] To solve the above problems, the technical solution adopted by the present invention is:

[0005] A concrete slump detection device for engineering inspection comprises a bottom plate, an operating table is provided at the upper end of the bottom plate, a liftable cross seat is provided at the upper end of the operating table, a conical cylinder is provided on the inner wall of the cross seat, a top cover which can move up and down is provided at the upper end of the cross seat, a tamping rod is provided at the lower end of the top cover, a rotatable active spur gear is also provided at the lower end of the top cover, and when the active spur gear rotates, a structure in which the tamping rod moves intermittently in a circular motion while deflecting up and down is formed; a plurality of evenly distributed sealing panels are provided at the upper end of the operating table, a funnel is provided at the lower end of the operating table, a plurality of billiard balls matched with the funnel are also provided at the lower end of the operating table, a supporting plate which can move up and down is provided at the upper end of the bottom plate, a recovery bucket is placed at the upper end of the supporting plate, and when the supporting plate moves upward, a structure in which the sealing panel moves outward and opens is formed, and when the supporting plate moves downward, a structure in which the billiard balls swing back and forth and continuously hit the funnel is formed.

[0006] Two long guide rods are fixedly connected to the upper end surface of the cross seat, and two symmetrically arranged first extension seats and second extension seats are fixedly connected to the outer surface of the top cover. The first extension seats are respectively sleeved on the outer surfaces of the corresponding long guide rods. Two rotatable first threaded rods are also provided on the upper end of the cross seat, and the second extension seats are respectively threadedly connected to the outer surfaces of the corresponding first threaded rods.

[0007] The upper end surface of the top cover is fixedly connected to the second motor, the driving spur gear is fixedly connected to the output end of the second motor, the lower end surface of the top cover is slidably connected to the top plate, the outer surface of the driving spur gear is meshed with a driven spur gear rotatably connected to the top plate, the inner wall of the top cover is fixedly connected to an intermittent concave ring, the lower end of the driven spur gear is coaxially fixedly connected to an intermittent cam matching the intermittent concave ring, and the tamping rod is installed at the lower end of the top plate.

[0008] A U-shaped seat is fixedly connected to one side of the lower end surface of the top plate, and oval plates are fixedly connected to both sides of the lower end surface of the U-shaped seat. Side seats are fixedly connected to the lower ends of the outer surfaces of the oval plates, and a circular sleeve is hinged on the inner sides of the two side seats. The tamping rod is slidably connected to the inner wall of the circular sleeve.

[0009] The lower end of the intermittent cam is coaxially fixed with a first bevel gear, the inner wall of the U-shaped seat is rotatably connected with a second bevel gear meshing with the first bevel gear, and driving pulleys are coaxially fixed to both sides of the second bevel gear, and driven pulleys connected to the driving pulley are rotatably connected to the inner sides of the centers of the two elliptical disks, and driving rods are coaxially fixed to the inner sides of the driven pulleys, and top caps are fixed to the upper end surfaces of the tamping rods, and first sliding pins are fixed to the upper ends of the outer surfaces of the top caps, and driving key grooves matching with the first sliding pins are respectively provided on the driving rods, and elliptical grooves matching with the first sliding pins are respectively provided on the inner end surfaces of the two elliptical disks.

[0010] The inner wall of the base plate is slidably connected to a first support plate, and a second telescopic rod is respectively fixedly connected to the left and right sides of the upper end surface of the first support plate, the support plate is fixedly connected to the upper ends of the two second telescopic rods, and the left and right sides of the upper end surface of the base plate are respectively fixedly connected to a first support seat, a rotatable worm is respectively provided on the inner end surface of the first support seat, and a worm wheel is respectively meshed with the upper end of the outer surface of the worm, and long cranks are respectively coaxially fixed to the inner ends of the two worm wheels, and long pins are respectively fixedly connected to the left and right end surfaces of the support plate, and long key grooves matching the long pins are respectively opened on the long cranks, and L-shaped frames are also respectively fixedly connected to the left and right sides of the upper end surface of the base plate, and L-shaped frames are respectively opened with L-shaped grooves matching the long pins.

[0011] The lower end surface of the funnel is fixedly connected to an inner cylinder, the outer surface of the inner cylinder is slidably connected to an outer cylinder that matches the recovery barrel, the outer surface of the outer cylinder is hinged with four long connecting rods that are evenly distributed and inclined toward the outer side of the upper end, the lower end surfaces of the sealing panels are respectively fixed with driving seats, and the upper ends of the long connecting rods are respectively hinged to the corresponding sealing panels.

[0012] A U-shaped rack is fixedly connected to the outer end surface of the driving seat, and a plurality of small spur gears meshing with the U-shaped rack are rotatably connected to the lower end surface of the operating table. A one-way transmission mechanism is arranged inside the small spur gears, and a short crank is arranged at the lower end of the one-way transmission mechanism. Short pins are fixedly connected to the lower end surfaces of the short cranks. A plurality of T-shaped plates are slidably connected to the lower end surface of the operating table, and a plurality of short key grooves matching with the short pins are respectively opened at the outer ends of the T-shaped plates. A plurality of swing rods are hinged to the lower end surfaces of the operating table, and the billiard balls are respectively fixed to the corresponding swing rods. Short connecting rods are hinged to the inner ends of the T-shaped plates, and the short connecting rods are hinged to the corresponding swing rods.

[0013] The one-way transmission mechanism includes a ratchet wheel fixedly connected to a small spur gear, a small disc rotatably connected to the operating table is provided at the center of the ratchet wheel, two symmetrical pawls meshing with the ratchet wheel are hinged at the non-center of the lower end surface of the small disc, and elastic sheets matching with the pawls are also fixedly connected to the lower end surface of the small disc, and the short cranks are coaxially fixed to the corresponding lower ends of the small discs.

[0014] Four evenly distributed U-shaped blocks are fixedly connected to the outer periphery of the upper end surface of the operating table, and the inner end surfaces of the U-shaped blocks are respectively fixedly connected to the first telescopic rods, and the inner ends of the two first telescopic rods are fixedly connected to a pushing plate, and the outer surfaces of the first telescopic rods are also respectively covered with first springs that match the pushing plates; the middle part of the U-shaped block seat is rotatably connected to the fixed pulley, and the outer surfaces of the fixed pulleys are respectively covered with pull ropes, one end of the pull ropes is respectively fixed to the corresponding pushing plates, and the other end of the pull ropes is respectively fixed to the corresponding sealing panels; the lower end of the outer surface of the outer cylinder is fixedly connected to a reset seat, and the lower end surface of the operating table is also fixedly connected to four evenly distributed large guide rods, the reset seat is sleeved on the outer surfaces of the large guide rods, and the outer surfaces of the large guide rods are also respectively covered with large springs that match the reset seat.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] After the conical cylinder is filled, the first motor is started to control the top cover, the tamping rod, etc. to move downward to the specified position. When the corresponding active spur gear rotates, the tamping rod can make an intermittent circular rotation while moving up and down and then deflect and move. When deflecting and moving, it can approach the side wall of the conical cylinder and compact the concrete when moving up and down, so that the concrete in the conical cylinder is loaded more evenly. When the tamping rod makes an intermittent circular rotation, the inner wall of the conical cylinder can be compacted in a large range. The support plate and the recovery barrel are normally located at the front side of the upper end of the bottom plate, which is convenient for users to take. When in use, concrete is poured into the conical cylinder, and the concrete in the conical cylinder can be compacted when the tamping rod works. The conical cylinder is moved upward by controlling the first lifting rod, that is, it is out of contact with the concrete. At this time, the concrete is under its own gravity and flow. It will collapse. The slump detection of concrete can be completed by measuring the height of the slump. When the concrete needs to be recycled, the third motor is started to control the support plate and the recycling barrel to move upward, which can make the sealed panel move outward and open. At this time, the concrete material can fall into the funnel and the recycling barrel under the action of gravity. When the support plate and the recycling barrel move downward, the billiard ball will continue to swing, and the billiard ball will knock on the funnel when swinging. After knocking, the funnel will vibrate. At this time, the concrete attached to the inner wall of the funnel will fall into the recycling barrel, that is, the recycling is cleaner and more thorough. The device can automatically replace the manual tamping operation after filling, and can make the recycling barrel accurately at the drop port during the unloading and recycling process to prevent the concrete from leaking out and adhering to the inner wall of the equipment, reduce equipment pollution and improve the recovery rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a first axonometric diagram of a concrete slump detection device for engineering inspection according to the present invention.

[0018] Figure 2 This is a second axonometric diagram of a concrete slump detection device for engineering inspection according to the present invention.

[0019] Figure 3 The present invention is a schematic diagram of the installation of a cross base of a concrete slump detection device for engineering detection.

[0020] Figure 4 The present invention is a schematic diagram of the conical cylinder structure of a concrete slump detection device for engineering detection.

[0021] Figure 5 The present invention is a schematic diagram of the top plate installation of a concrete slump detection device for engineering detection.

[0022] Figure 6The present invention is a top plate cross-sectional view of a concrete slump detection device for engineering detection.

[0023] Figure 7 The present invention is a schematic diagram of the installation of an intermittent cam of a concrete slump detection device for engineering detection.

[0024] Figure 8 The present invention is a schematic diagram of the installation of an elliptical plate of a concrete slump detection device for engineering detection.

[0025] Fig. 9 The present invention is a schematic diagram of the installation of a driving rod of a concrete slump detection device for engineering detection.

[0026] Fig.10 The present invention is a schematic diagram of the installation of sealed panels of a concrete slump detection device for engineering inspection.

[0027] Fig.11 The present invention is a schematic diagram of the installation of a push plate of a concrete slump detection device for engineering detection.

[0028] Fig.12 The present invention is a schematic diagram of the installation of a reset seat of a concrete slump detection device for engineering detection.

[0029] Fig.13 The present invention is a schematic diagram of the installation of a billiard ball of a concrete slump detection device for engineering detection.

[0030] Fig.14 The present invention is a schematic diagram of the installation of a T-shaped plate of a concrete slump detection device for engineering detection.

[0031] Fig.15 The present invention is a schematic diagram of the installation of a support plate of a concrete slump detection device for engineering detection.

[0032] Fig.16 The invention discloses a schematic diagram of the installation of a long crank of a concrete slump detection device for engineering detection.

[0033] Fig.17 The present invention is a schematic diagram of the installation of a support plate of a concrete slump detection device for engineering detection.

[0034] Numbers in the figure: 1-bottom plate, 2-moving wheel, 3-support column, 4-operating table, 5-first lifting rod, 6-cross seat, 7-conical cylinder, 8-expansion, 9-long guide rod, 10-first extension seat, 11-second extension seat, 12-first threaded rod, 13-top cover, 14-first motor, 15-second motor, 16-driving spur gear, 17-driven spur gear, 18-top plate, 19-intermittent concave ring, 20-intermittent cam, 21-first bevel gear, 22-second bevel gear, 23-U-shaped seat, 24-driving pulley, 25-driven pulley, 26-elliptical disk, 27-driving rod, 28-driving keyway, 29-first sliding pin, 30-elliptical groove, 31-sealing puzzle, 32-pushing plate, 33-funnel, 34-inner cylinder, 35-outer cylinder, 36-U-shaped stopper, 37-pull rope, 38-fixed pulley, 39-first telescopic rod, 40-first spring, 41-long connecting rod, 42-driving seat, 43-U-shaped rack, 44-small spur gear, 45-ratchet, 46-pawl, 47-elastic sheet, 48-short crank, 49-short pin, 50-short keyway, 51-T-shaped plate, 52-limiting sleeve, 53-short connecting rod, 54-swing rod, 55-billiard ball, 56-first supporting seat, 57 - the third motor, 58 - worm, 59 - worm wheel, 60 - long crank, 61 - long pin, 62 - long keyway, 63 - L-shaped frame, 64 - L-shaped slot, 65 - first support plate, 66 - second telescopic rod, 67 - support plate, 68 - recovery bucket, 69 - card slot, 70 - tamping rod, 71 - round sleeve, 72 - top cap, 73 - small disc, 74 - large guide rod, 75 - large spring, 76 - reset seat. DETAILED DESCRIPTION

[0035] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0036] like Figure 1-Figure 17As shown, the present invention provides a concrete slump detection device for engineering detection, comprising a bottom plate 1, an operating table 4 is provided at the upper end of the bottom plate 1, a cross seat 6 which can be raised and lowered is provided at the upper end of the operating table 4, a conical cylinder 7 is provided on the inner wall of the cross seat 6, a top cover 13 which can be moved up and down is provided at the upper end of the cross seat 6, a tamping rod 70 is provided at the lower end of the top cover 13, and a rotatable active spur gear 16 is also provided at the lower end of the top cover 13, and when the active spur gear 16 rotates, the tamping rod 70 can intermittently move in a circular motion while deflecting up and down. A movable structure; a plurality of evenly distributed sealing panels 31 are provided at the upper end of the operating table 4, a funnel 33 is provided at the lower end of the operating table 4, a plurality of billiard balls 55 cooperating with the funnel 33 are also provided at the lower end of the operating table 4, a support plate 67 which can be moved up and down is provided at the upper end of the bottom plate 1, a recovery bucket 68 is placed at the upper end of the support plate 67, when the support plate 67 moves upward, a structure in which the sealing panel 31 moves outward and opens can be formed, and when the support plate 67 moves downward, a structure in which the billiard balls 55 swing back and forth and continuously hit the funnel 33 can be formed.

[0037] like Figure 1-Figure 16As shown, four evenly distributed foot brake moving wheels 2 are fixedly connected to the lower end surface of the bottom plate 1. The movement of the foot brake can enable the device to reach a specified position. The foot brake moving wheels 2 are prior art and will not be described in detail. Four evenly distributed support columns 3 are fixedly connected to the upper end surface of the bottom plate 1. The operating table 4 is fixedly connected to the upper end surface of the support columns 3. The support columns 3 are used to support the position-limiting operating table 4. Four evenly distributed first lifting rods 5 are fixedly connected to the upper end surface of the operating table 4. The cross seat 6 is fixedly connected to the first lifting rod 5. The first lifting rod 5 can drive the cross seat 6 to move up and down. , and after moving to the specified position, the position of the cross seat 6 can be fixed, that is, the position of the conical tube 7 is fixed and limited, that is, the first lifting rod 5 has a self-locking function, and the lifting rod is a prior art and is not described in detail; the conical tube 7 is a slump detection tube, and the conical tube 7 is fixedly connected to the inner wall of the cross seat 6. When the conical tube 7 moves downward to the bottom end, it can contact the operating table 4 and the upper end surface of the sealing puzzle 31; a rectangular through hole is opened in the middle of the operating table 4, and when the sealing puzzle 31 moves inward and closes to the innermost end, the rectangular through hole can be closed. The sealing plate 31 is closed, and when the sealing plate 31 moves outward, the rectangular through hole can be opened, so that the tested concrete falls into the recycling bucket 68 under the action of gravity for recycling; the top cover 13 plays a supporting role in the installation of the tamping rod 70, the active spur gear 16 and other parts. When the top cover 13 is raised or lowered, the active spur gear 16 and the tamping rod 70 can be driven to rise or fall, so that the tamping rod 70 moves downward to the specified position, that is, to the upper end of the conical cylinder 7; after the conical cylinder 7 is filled, the top cover 13 and the tamping rod 70 are controlled to be filled. When the tamping rod 70 moves downward to the designated position, the corresponding active spur gear 16 rotates, which enables the tamping rod 70 to intermittently rotate in a circular motion while moving up and down and then deflecting and moving. When the tamping rod 70 deflects and moves, the tamping rod 70 can approach the side wall of the conical cylinder 7 and compact the concrete when it moves up and down, so that the concrete in the conical cylinder 7 is loaded more evenly. When the tamping rod 70 intermittently rotates in a circular motion, the inner wall of the conical cylinder 7 can be compacted in a wide range. The support plate 67 and the recovery bucket 68 are normally located at the front side of the upper end of the bottom plate 1, which is convenient for users to take.When in use, concrete is poured into the conical cylinder 7, and the tamping rod 70 can tamp the concrete in the conical cylinder 7 when it works. The conical cylinder 7 is moved upward by controlling the first lifting rod 5, that is, it is out of contact with the concrete. At this time, the concrete will collapse under its own gravity and flow. The slump detection of the concrete can be completed by measuring the height of the slump. When it is necessary to recycle the concrete, the sealing plate 31 can be moved outward and opened by controlling the support plate 67 and the recovery bucket 68 to move upward. At this time, the concrete material can fall into the funnel 33 and the recovery bucket 68 under the action of gravity. Inside, when the support plate 67 and the recycling bucket 68 move downward, the billiard ball 55 will swing continuously, and when the billiard ball 55 swings, it will knock on the funnel 33. After knocking, the funnel 33 will vibrate, and at this time, the concrete attached to the inner wall of the funnel 33 will fall into the recycling bucket 68, that is, the recycling is cleaner and more thorough. After filling, the device can automatically replace the manual tamping operation, and during the unloading and recycling process, the recycling bucket 68 can be accurately placed at the drop port to prevent the concrete from leaking out and adhering to the inner wall of the equipment, reducing equipment pollution and improving the concrete recovery rate. ;

[0038] Two long guide rods 9 are fixedly connected to the upper end surface of the cross seat 6, and two symmetrically arranged first extension seats 10 and second extension seats 11 are fixedly connected to the outer surface of the top cover 13. The first extension seats 10 are respectively sleeved on the outer surfaces of the corresponding long guide rods 9. Two rotatable first threaded rods 12 are also provided on the upper end of the cross seat 6, and the second extension seats 11 are respectively threadedly connected to the outer surfaces of the corresponding first threaded rods 12.

[0039] like Figure 1-Figure 5 As shown, the long guide rod 9 can limit the first extension seat 10 to move only up and down, that is, the limiting top cover 13 can only move up and down; the first threaded rod 12 is rotatably connected to the inner wall of the cross seat 6, and the lower end surface of the cross seat 6 is also fixedly connected to two first motors 14, the first threaded rod 12 is fixedly connected to the output end of the first motor 14, the function of the first motor 14 is to provide rotational force for the first threaded rod 12, the motor is prior art and will not be repeated; when the first threaded rod 12 rotates, under the threaded connection with the second extension seat 11, it can drive the second extension seat 11 and the top cover 13 to move upward or downward, thereby driving the top cover 13 and the tamping rod 70 to move upward or downward, and the first threaded rod 12 has a self-locking function under the threaded connection with the second extension seat 11, that is, when the first threaded rod 12 does not rotate, the corresponding top cover 13 position is in a fixed state.

[0040] A second motor 15 is fixedly connected to the upper end surface of the top cover 13, a driving spur gear 16 is fixedly connected to the output end of the second motor 15, a top plate 18 is slidably connected to the lower end surface of the top cover 13, a driven spur gear 17 rotatably connected to the top plate 18 is meshed on the outer surface of the driving spur gear 16, an intermittent concave ring 19 is fixedly connected to the inner wall of the top cover 13, an intermittent cam 20 coaxially fixedly connected to the lower end of the driven spur gear 17 and matched with the intermittent concave ring 19, and the tamping rod 70 is installed at the lower end of the top plate 18.

[0041] like Figure 5-Figure 7 As shown, the function of the second motor 15 is to provide a rotational force for the driving spur gear 16; a rotating shaft is fixedly connected to the inner wall of the center of the driving spur gear 16 and the driven spur gear 17, and the rotating shaft is rotatably connected to the inner wall of the top plate 18; the top plate 18 is slidably connected to the lower end surface of the top cover 13, and the top plate 18 can rotate in a circle on the lower end surface of the top cover 13, that is, the top plate 18 is rotatably connected to the lower end surface of the top cover 13; the installation and shape of the intermittent concave ring 19 and the intermittent cam 20 are as shown in FIG. Figure 7 As shown, when the intermittent cam 20 rotates, the intermittent cam 20, the top plate 18, and the tamping rod 70 can intermittently move in a circular motion through the engagement with the intermittent concave ring 19, and under the engagement between the intermittent cam 20 and the intermittent concave ring 19, the intermittent cam 20, the top plate 18, and the tamping rod 70 can intermittently rotate to a specified position and then stop, that is, they have a self-locking function, so that the tamping rod 70 has strong stability during operation; when the second motor 15 is started, it can drive the corresponding active spur gear 16 to rotate, and when the active spur gear 16 rotates, it will drive the corresponding driven spur gear 17 and the intermittent cam 20 to rotate synchronously, and when the intermittent cam 20 rotates, it will drive the top plate 18 and the tamping rod 70 to intermittently rotate in a circular motion.

[0042] A U-shaped seat 23 is fixedly connected to one side of the lower end surface of the top plate 18, and oval plates 26 are fixedly connected to both sides of the lower end surface of the U-shaped seat 23. Side seats are fixedly connected to the lower ends of the outer surfaces of the oval plates 26. A circular sleeve 71 is hingedly connected to the inner side of the two side seats, and the tamping rod 70 is slidably connected to the inner wall of the circular sleeve 71.

[0043] like Figure 8 As shown, the U-shaped seat 23 supports and fixes the oval disk 26 and other components, and the side seat supports and limits the circular sleeve 71. The circular sleeve 71 supports and limits the tamping rod 70, so that the tamping rod 70 can move up and down and swing.

[0044] The lower end of the intermittent cam 20 is coaxially fixed with a first bevel gear 21, the inner wall of the U-shaped seat 23 is rotatably connected with a second bevel gear 22 meshing with the first bevel gear 21, and the two sides of the second bevel gear 22 are coaxially fixed with driving pulleys 24, and the inner sides of the centers of the two elliptical disks 26 are respectively rotatably connected with driven pulleys 25 connected with the driving pulley 24, and the inner sides of the driven pulleys 25 are respectively coaxially fixed with driving rods 27, and the upper end surfaces of the tamping rod 70 are respectively fixed with top caps 72, and the upper ends of the outer surfaces of the top caps 72 are respectively fixed with first sliding pins 29, and the driving rod 27 is respectively provided with driving key grooves 28 matching with the first sliding pin 29, and the inner end surfaces of the two elliptical disks 26 are respectively provided with elliptical grooves 30 matching with the first sliding pin 29.

[0045] like Figure 6-Figure 9 As shown, the inner wall of the center of the second bevel gear 22 and the two driving pulleys 24 is fixed with a rotating shaft, which is rotatably connected to the inner wall of the U-shaped seat 23, limiting the second bevel gear 22 and the driving pulley 24 to only rotate; the inner wall of the driven pulley 25 and the driving rod 27 is fixed with a rotating shaft, which is rotatably connected to the elliptical disk 26, and the installation and shape of the elliptical disk 26, the driving rod 27, the first sliding pin 29, the driving keyway 28, and the elliptical groove 30 are as shown in FIG. Fig. 9 As shown, when the driving rod 27 rotates, the first sliding pin 29 is driven to move along the inner wall of the elliptical groove 30 through the engagement of the driving key groove 28 and the first sliding pin 29. When the first sliding pin 29 moves along the inner wall of the elliptical groove 30, the corresponding tamping rod 70 is driven to move back and forth up and down while deflecting and swinging back and forth. The stroke of the tamping rod 70 moving up and down is the upper and lower height distance of the elliptical groove 30. The amplitude of the left and right deflection and swing of the tamping rod 70 is related to the width distance between the left and right ends of the elliptical groove 30, and can be specifically set according to the inclination of the conical cylinder 7.

[0046] The inner wall of the base plate 1 is slidably connected with a first support plate 65, and the left and right sides of the upper end surface of the first support plate 65 are respectively fixed with second telescopic rods 66, and the supporting plate 67 is fixed to the upper ends of the two second telescopic rods 66, and the left and right sides of the upper end surface of the base plate 1 are respectively fixed with first support seats 56, and the inner end surfaces of the first support seats 56 are respectively provided with rotatable worms 58, and the upper ends of the outer surfaces of the worms 58 are respectively meshed with worm wheels 59, and the inner ends of the two worm wheels 59 are respectively coaxially fixed with long cranks 60, and the left and right end surfaces of the supporting plate 67 are respectively fixed with long pins 61, and the long cranks 60 are respectively provided with long key grooves 62 matching the long pins 61, and the left and right sides of the upper end surface of the base plate 1 are also respectively fixed with L-shaped frames 63, and the L-shaped frames 63 are respectively provided with L-shaped grooves 64 matching the long pins 61.

[0047] like Figure 15-17As shown, the first support plate 65 can be slidably connected to the inner wall of the bottom plate 1 forward and backward, and the second telescopic rod 66 can be telescoped up and down. The support plate 67 is fixed to the second telescopic rod 66, and the support plate 67 can be limited to move up and down only at the upper end of the first support plate 65. The first support plate 65 and the second telescopic rod 66 limit the support plate 67, and the support plate 67 can be limited to always maintain horizontal up and down movement or forward and backward movement; a slot 69 is provided at the upper end of the support plate 67, and the recovery bin 68 is placed on the inner wall of the slot 69, that is, the recovery bin 68 can be stably located at the upper end of the support plate 67; the inner end surface of the first support seat 56 A third motor 57 is fixedly connected to the upper and lower surfaces respectively, and a worm 58 is fixedly connected to the output end of the third motor 57 respectively. The function of the third motor 57 is to provide a rotational force for the worm 58. A bearing seat is rotatably connected to the outer surface of the worm 58, and the bottom end of the bearing seat is fixedly connected to the first support seat 56, so that the limited worm 58 can only rotate on the first support seat 56; the inner walls of the worm wheel 59 and the long crank 60 are respectively fixedly connected with a rotating shaft, and the rotating shaft is rotatably connected to the corresponding inner wall of the first support seat 56, so that the limited worm wheel 59 and the long crank 60 can only rotate; the installation and shape of the long crank 60, the long keyway 62, the long pin 61, and the L-shaped frame 63 are as shown in Fig.16 As shown, when the long crank 60 rotates, the long pin 61 can be driven to move along the inner wall of the L-shaped groove 64 through the meshing of the long pin 61 and the long key groove 62, that is, it first moves horizontally backward and then moves vertically upward, and under the self-locking of the worm 58 and the worm wheel 59, the corresponding long pin 61 stops after moving to the specified position, that is, the corresponding long pin 61 can be in a stable state when it does not move; after starting the third motor 57, the corresponding worm 58 can be driven to rotate, and when the worm 58 rotates, it will drive the worm wheel 59 and the long crank 60 to rotate in a circle through the meshing of the long crank 60 and the long pin 61. It will drive the long pin 61 to move horizontally backward first, that is, the corresponding support plate 67 and recovery bucket 68 will move horizontally backward first, and after moving backward to the specified position, that is, the support plate 67 and recovery bucket 68 move to the position directly below the outer cylinder 35, the long crank 60 will drive the corresponding support plate 67 and recovery bucket 68 to move upward when it rotates to receive the fallen concrete; through the setting of the L-shaped frame 63, the support plate 67 and recovery bucket 68 can be placed at the front side of the lower end of the device under normal conditions, which is convenient for taking the recovery bucket 68; the support plate 67 and recovery bucket 68 can also be controlled to move upward by setting a simple vertical lifting mechanism, and the lifting mechanism is a prior art and will not be described in detail.

[0048] The lower end surface of the funnel 33 is fixedly connected to an inner cylinder 34, and the outer surface of the inner cylinder 34 is slidably connected to an outer cylinder 35 that matches the recovery barrel 68. Four long connecting rods 41 that are evenly distributed and inclined toward the outer side of the upper end are hinged on the outer surface of the outer cylinder 35. The lower end surfaces of the sealing panels 31 are respectively fixedly connected to driving seats 42, and the upper ends of the long connecting rods 41 are respectively hinged on the corresponding sealing panels 31.

[0049] like Figure 10-13 As shown, the sealing panel 31 can slide forward and backward or left and right on the inner wall of the operating table 4, that is, the limit drive seat 42 can move inward or outward, and the installation and shape of the inner cylinder 34, the outer cylinder 35, and the long connecting rod 41 are as shown in FIG. Fig.12 As shown, the outer cylinder 35 can be slidably connected to the outer surface of the inner cylinder 34 up and down. When the outer cylinder 35 moves up and down, it can push the lower end of the long connecting rod 41 to move up and down, and the upper end of the long connecting rod 41 will drive the corresponding driving seat 42 and the sealing panel 31 to move inward or outward; that is, when the outer cylinder 35 moves upward, it can drive the sealing panel 31 to move outward and open, and when the outer cylinder 35 moves downward, it can make the sealing panel 31 move inward and close; when the recovery barrel 68 moves upward, it can lift the outer cylinder 35 to move upward, so that when the recovery barrel 68 moves upward, the sealing panel 31 moves outward and opens.

[0050] The outer end surfaces of the driving seat 42 are respectively fixedly connected with U-shaped racks 43, and the lower end surfaces of the operating table 4 are respectively rotatably connected with a plurality of small spur gears 44 meshing with the U-shaped racks 43. One-way transmission mechanisms are respectively arranged inside the small spur gears 44, and short cranks 48 are respectively arranged at the lower ends of the one-way transmission mechanisms. Short pins 49 are respectively fixedly connected to the lower end surfaces of the short cranks 48. The lower end surface of the operating table 4 is also slidably connected with a plurality of T-shaped plates 51, and a plurality of short key grooves 50 matching the short pins 49 are respectively opened at the outer ends of the T-shaped plates 51. The lower end surface of the operating table 4 is also hinged with a plurality of swing rods 54, and the billiard balls 55 are respectively fixedly connected to the corresponding swing rods 54. Short connecting rods 53 are respectively hinged to the inner ends of the T-shaped plates 51, and the short connecting rods 53 are respectively hinged to the corresponding swing rods 54.

[0051] like Figure 13-14 As shown, the U-shaped rack 43 can slide left and right or front and back on the lower end surface of the operating table 4, that is, the U-shaped rack 43 can move inward or outward with the driving seat 42; through the meshing of the U-shaped rack 43 and the small spur gear 44, the small spur gear 44 can be driven to rotate forward or reverse when the U-shaped rack 43 moves; through the one-way transmission mechanism set up, the rotational force of the small spur gear 44 can be transmitted in one direction, that is, when the U-shaped rack 43 moves from the inside to the outside, the corresponding rotational force of the small spur gear 44 will not be driven to the short crank 48 under the setting of the one-way transmission mechanism, and when the U-shaped rack 43 moves from the outside to the inside, the rotational force of the small spur gear 44 can be transmitted to the short crank 48 under the setting of the one-way transmission mechanism; the T-shaped plate 51, the short crank 48, and the short pin 49 are installed and shaped as shown in the figure. Fig.14As shown, the lower end surface of the operating table 4 is fixedly connected with a limiting sleeve 52, and the T-shaped plate 51 is slidably connected to the inner wall of the limiting sleeve 52, which is equivalent to the T-shaped plate 51 being slidably connected to the lower end surface of the operating table 4. The limiting sleeve 52 limits the T-shaped plate 51, so that the T-shaped plate 51 can only slide inward or outward on the lower end surface of the operating table 4. Through the engagement of the short sliding pin and the short key groove 50, when the short crank 48 rotates, the corresponding T-shaped plate 51 can be driven to move inward or outward; the rocker 54, the billiard ball 55, the short connecting rod 53, and the T-shaped plate 51 are installed and shaped as shown in FIG. Fig.13 As shown, when the T-shaped plate 51 moves inward or outward, the corresponding swing rod 54 can be driven to swing inward or outward through the hinge of the short connecting rod 53. When the swing rod 54 and the billiard ball 55 swing inward, the corresponding billiard ball 55 will be driven to move inward. When the billiard ball 55 moves inward, it will hit the funnel 33, even if the funnel 33 oscillates, thereby preventing the concrete from adhering to the funnel 33; therefore, with the cooperation of the U-shaped rack 43, the small spur gear 44, the one-way transmission mechanism, and the swing rod 54, it can be presented that when the outer cylinder 35 moves upward, that is, when the corresponding drive seat 42 and the sealing puzzle plate 31 move outward, the corresponding billiard ball 55 will not swing to work, and when the outer cylinder 35 moves downward, that is, when the corresponding drive seat 42 and the sealing puzzle plate 31 move downward, the billiard ball 55 will flip and swing inward to hit the funnel 33.

[0052] The one-way transmission mechanism includes a ratchet 45 fixedly connected to the small spur gear 44, a small disc 73 rotatably connected to the operating table 4 is provided at the center of the ratchet 45, two symmetrical pawls 46 meshing with the ratchet 45 are hinged at the non-center of the lower end surface of the small disc 73, and elastic sheets 47 matching the pawls 46 are fixedly connected to the lower end surface of the small disc 73. The short cranks 48 are coaxially fixed to the corresponding lower ends of the small discs 73.

[0053] like Fig.14 As shown, the inner wall of the small disc 73 and the short crank 48 is fixed with a rotating shaft, which is rotatably connected to the inner wall of the lower end of the operating table 4. The limited small disc 73 and the short crank 48 can only rotate synchronously at the lower end of the operating table 4. The installation and shape of the elastic sheet 47, the pawl 46, and the small disc 73 are as shown in FIG. Fig.14 As shown, the elastic sheet 47 always exerts an outward driving force on the pawl 46, so that the pawl 46 is stably meshed with the ratchet 45 under normal conditions; through the meshing of the ratchet 45 and the pawl 46, the rotational force can be transmitted unidirectionally, that is, when the U-shaped rack 43 moves outward, the corresponding short crank 48 will not rotate and the billiard ball 55 will not work, and when the U-shaped rack 43 moves inward, the corresponding short crank 48 rotates and the billiard ball 55 swings.

[0054] Four evenly distributed U-shaped blocks 36 are fixedly connected to the outer periphery of the upper end surface of the operating table 4, and the inner end surfaces of the U-shaped blocks 36 are respectively fixedly connected to first telescopic rods 39, and the inner ends of the two first telescopic rods 39 are fixedly connected to a push plate 32, and the outer surfaces of the first telescopic rods 39 are also respectively covered with first springs 40 that match the push plates 32; the middle parts of the U-shaped blocks 36 are respectively rotatably connected to fixed pulleys 38, and the outer surfaces of the fixed pulleys 38 are respectively covered with pull ropes 37, one end of the pull ropes 37 is respectively fixedly connected to the corresponding push plates 32, and the other ends of the pull ropes 37 are respectively fixedly connected to the corresponding sealing panels 31; the lower end of the outer surface of the outer cylinder 35 is fixedly connected to a reset seat 76, and the lower end surface of the operating table 4 is also fixedly connected to four evenly distributed large guide rods 74, the reset seat 76 is sleeved on the outer surface of the large guide rods 74, and the outer surfaces of the large guide rods 74 are also respectively covered with large springs 75 that match the reset seat 76.

[0055] like Figure 10-12 As shown, the U-shaped stopper 36 can support and limit the fixed pulley 38, the first spring 40, the first telescopic rod 39, etc., and the push plate 32 can only move inward or outward by limiting the push plate 32 through the first telescopic rod 39. One end of the first spring 40 is fixedly connected to the U-shaped stopper 36, and the other end of the first spring 40 is fixedly connected to the push plate 32. The first spring 40 always has an inward thrust on the push plate 32; the installation and shape of the fixed pulley 38 and the pull rope 37 are as shown in FIG. Fig.11 As shown, under the thrust of the first spring 40, the stretcher can always be in a tensioned state; Figure 4The upper end surface of the tapered cylinder 7 is fixedly connected with a flared opening 8, which is convenient for pouring concrete into the tapered cylinder 7; the reset seat 76 can move up and down on the outer surfaces of the four large guide rods 74; the lower end surfaces of the large guide rods 74 are respectively fixedly connected with anti-slip pads to prevent the reset seat 76 from being out of contact with the large guide rods 74; under the elastic force of the large spring 75 itself, the reset seat 76 and the outer cylinder 35 can be in the lowest state under normal conditions, that is, the corresponding sealing puzzle plate 31 is always at the innermost end, and the elastic force of the large spring 75 is much greater than the elastic force of the first spring 40, which can make The sealing panel 31 is in the innermost closed state under normal conditions; the two ends of the push plate 32 are respectively provided with mutually matching slots, which can prevent movement negotiation when the push plate 32 moves inward; when the recovery barrel 68 moves upward, it can drive the corresponding outer cylinder 35 to move upward, and the upward movement of the outer cylinder 35 will compress the large spring 75, that is, the corresponding sealing panel 31 will move outward, and the sealing panel 31 can be opened when it moves outward, and the concrete will fall into the recovery barrel 68 under the action of gravity. The overall area will become larger, and the push plate 32 is set, when it moves outside the sealing puzzle plate 31, the push plate 32 will move inward under the elastic force of the first spring 40, and the push plate 32 will push the concrete when it moves inward, so that all the concrete on the upper end of the operating table 4 is pushed into the recovery bucket 68, making the concrete recovery cleaner, and when the recovery bucket 68 moves downward, the corresponding reset seat 76 and the outer cylinder 35 will move downward and reset under the elastic force of the large spring 75, and the outer cylinder 35 will move downward and reset When the sealing panel 31 moves inward, the corresponding pushing plate 32 will move outward and reset under the pulling force of the pull rope 37; when the outer cylinder 35 moves downward, the corresponding driving seat 42 will be driven to move inward, that is, the U-shaped rack 43 moves inward to make the billiard ball 55 swing and start working, and the billiard ball 55 will knock on the funnel 33 under the swinging, so that the funnel 33 will vibrate to prevent concrete from adhering to the funnel 33.

[0056] When the present invention is in use, after the conical cylinder 7 is filled, the first motor 14 is started to control the top cover 13, the tamping rod 70, etc. to move downward to the specified position, and the corresponding active spur gear 16 can rotate so that the tamping rod 70 can intermittently rotate in a circular motion while moving up and down and deflecting. When deflecting, it can approach the side wall of the conical cylinder 7 and tamp the concrete when moving up and down, so that the concrete in the conical cylinder 7 is loaded more evenly. When the tamping rod 70 intermittently rotates in a circular motion, the inner wall of the conical cylinder 7 can be tamped in a large range; the support plate 67 and the recovery bucket 68 are normally located at the front side of the upper end of the bottom plate 1, which is convenient for users to take; when in use, concrete is poured into the conical cylinder 7, and the concrete in the conical cylinder 7 can be tamped when the tamping rod 70 works, and the conical cylinder 7 is moved upward by controlling the first lifting rod 5, that is, it is out of contact with the concrete. At this time, the concrete is under the influence of its own gravity and When the concrete is in a state of being poured into the hopper 33 and the recycling bucket 68, the concrete will collapse. The slump detection of the concrete can be completed by measuring the height of the slump. When the concrete needs to be recycled, the third motor 57 is started to control the support plate 67 and the recycling bucket 68 to move upward, so that the sealing panel 31 can be moved outward and opened. At this time, the concrete material can fall into the funnel 33 and the recycling bucket 68 under the action of gravity. When the support plate 67 and the recycling bucket 68 move downward, the billiard ball 55 will swing continuously, and the billiard ball 55 will knock the funnel 33 when swinging. After the knocking, the funnel 33 will vibrate. At this time, the concrete attached to the inner wall of the funnel 33 will fall into the recycling bucket 68, that is, the recycling is cleaner and more thorough. The device can automatically replace the manual tamping operation after filling, and can make the recycling bucket 68 accurately at the drop port during the unloading and recycling process, so as to prevent the concrete from leaking out and adhering to the inner wall of the equipment, reduce the pollution of the equipment and improve the recovery rate.

[0057] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A concrete slump detection device for engineering testing, comprising a base plate (1), characterized in that: An operating table (4) is provided at the upper end of the bottom plate (1), a cross seat (6) which can be raised and lowered is provided at the upper end of the operating table (4), a conical cylinder (7) is provided on the inner wall of the cross seat (6), a top cover (13) which can be moved up and down is provided at the upper end of the cross seat (6), a tamping rod (70) is provided at the lower end of the top cover (13), and a rotatable driving spur gear (16) is also provided at the lower end of the top cover (13), and when the driving spur gear (16) rotates, a structure is formed in which the tamping rod (70) moves intermittently in a circular motion while deflecting up and down; a plurality of The sealing panels (31) are evenly distributed, a funnel (33) is provided at the lower end of the operating table (4), a plurality of billiard balls (55) cooperating with the funnel (33) are also provided at the lower end of the operating table (4), a supporting plate (67) movable up and down is provided at the upper end of the bottom plate (1), a recovery bucket (68) is placed at the upper end of the supporting plate (67), and when the supporting plate (67) moves upward, a structure is formed in which the sealing panels (31) move outward and open, and when the supporting plate (67) moves downward, a structure is formed in which the billiard balls (55) swing back and forth to continuously hit the funnel (33); The upper end surface of the top cover (13) is fixedly connected to a second motor (15), a driving spur gear (16) is fixedly connected to the output end of the second motor (15), a top plate (18) is slidably connected to the lower end surface of the top cover (13), a driven spur gear (17) rotatably connected to the top plate (18) is meshed on the outer surface of the driving spur gear (16), an intermittent concave ring (19) is fixedly connected to the inner wall of the top cover (13), an intermittent cam (20) coaxially fixedly connected to the intermittent concave ring (19) is fixedly connected to the lower end of the driven spur gear (17), and the tamping rod (70) is mounted on the lower end of the top plate (18); A U-shaped seat (23) is fixedly connected to one side of the lower end surface of the top plate (18), an elliptical plate (26) is fixedly connected to both sides of the lower end surface of the U-shaped seat (23), and side seats are fixedly connected to the lower ends of the outer surfaces of the elliptical plates (26), a circular sleeve (71) is hingedly connected to the inner sides of the two side seats, and the tamping rod (70) is slidably connected to the inner wall of the circular sleeve (71); The lower end of the intermittent cam (20) is coaxially fixedly connected to a first bevel gear (21); the inner wall of the U-shaped seat (23) is rotatably connected to a second bevel gear (22) meshing with the first bevel gear (21); driving pulleys (24) are coaxially fixedly connected to both sides of the second bevel gear (22); driven pulleys (25) connected to the driving pulley (24) are rotatably connected to the inner sides of the centers of the two elliptical disks (26); driving rods (27) are coaxially fixedly connected to the inner sides of the driven pulleys (25); top caps (72) are fixedly connected to the upper end surfaces of the tamping rods (70); first sliding pins (29) are fixedly connected to the upper ends of the outer surfaces of the top caps (72); driving key slots (28) matching with the first sliding pins (29) are respectively provided on the driving rods (27); and elliptical grooves (30) matching with the first sliding pins (29) are respectively provided on the inner end surfaces of the two elliptical disks (26); The inner wall of the bottom plate (1) is slidably connected to a first support plate (65), and the left and right sides of the upper end surface of the first support plate (65) are respectively fixedly connected to the second telescopic rods (66), and the support plate (67) is fixedly connected to the upper ends of the two second telescopic rods (66). The left and right sides of the upper end surface of the bottom plate (1) are respectively fixedly connected to the first support seat (56), and a rotatable worm (58) is respectively provided on the inner end surface of the first support seat (56), and the upper ends of the outer surfaces of the worm (58) are respectively meshed with worm wheels (59), and the inner ends of the two worm wheels (59) are respectively coaxially fixedly connected to long cranks (60), and the left and right end surfaces of the support plate (67) are respectively fixedly connected to long pins (61), and the long cranks (60) are respectively provided with long key grooves (62) matching with the long pins (61). The left and right sides of the upper end surface of the bottom plate (1) are also respectively fixedly connected to L-shaped frames (63), and the L-shaped frames (63) are respectively provided with L-shaped grooves (64) matching with the long pins (61); The lower end surface of the funnel (33) is fixedly connected to an inner cylinder (34), the outer surface of the inner cylinder (34) is slidably connected to an outer cylinder (35) that matches the recovery barrel (68), the outer surface of the outer cylinder (35) is hinged to four long connecting rods (41) that are evenly distributed and inclined toward the outer side of the upper end, the lower end surfaces of the sealing panels (31) are respectively fixedly connected to driving seats (42), and the upper ends of the long connecting rods (41) are respectively hinged to the corresponding sealing panels (31); The outer end surfaces of the driving seat (42) are respectively fixedly connected with U-shaped racks (43); the lower end surface of the operating table (4) is respectively rotatably connected with a plurality of small spur gears (44) meshing with the U-shaped racks (43); a one-way transmission mechanism is respectively provided inside the small spur gears (44); the lower ends of the one-way transmission mechanisms are respectively provided with short cranks (48); the lower end surfaces of the short cranks (48) are respectively fixedly connected with short pins (49); the lower end surface of the operating table (4) is also slidably connected with a plurality of T-shaped plates (51); the outer ends of the T-shaped plates (51) are respectively provided with a plurality of short key grooves (50) matching with the short pins (49); the lower end surface of the operating table (4) is also respectively hinged with a plurality of swing rods (54); the billiard balls (55) are respectively fixedly connected to the corresponding swing rods (54); the inner ends of the T-shaped plates (51) are respectively hinged with short connecting rods (53); the short connecting rods (53) are respectively hinged with the corresponding swing rods (54); The one-way transmission mechanism comprises a ratchet wheel (45) fixedly connected to a small spur gear (44); a small disc (73) rotatably connected to the operating table (4) is provided at the center of the ratchet wheel (45); two symmetrical ratchet claws (46) meshing with the ratchet wheel (45) are hingedly connected at a non-center portion of the lower end surface of the small disc (73); elastic sheets (47) matching with the ratchet claws (46) are also fixedly connected to the lower end surface of the small disc (73); and the short cranks (48) are coaxially fixedly connected to the lower ends of the corresponding small discs (73).

2. A concrete slump detection device for engineering testing as claimed in claim 1, characterized in that: The upper end surface of the cross seat (6) is fixedly connected to two long guide rods (9), and the outer surface of the top cover (13) is fixedly connected to two symmetrically arranged first extension seats (10) and second extension seats (11), the first extension seats (10) are respectively sleeved on the outer surfaces of the corresponding long guide rods (9), and the upper end of the cross seat (6) is also provided with two rotatable first threaded rods (12), and the second extension seats (11) are respectively threadedly connected to the outer surfaces of the corresponding first threaded rods (12).

3. The concrete slump detection device for engineering testing according to claim 1, characterized in that: The operating table (4) is fixedly connected to four evenly distributed U-shaped blocks (36) at the outer periphery of the upper end surface, and the inner end surfaces of the U-shaped blocks (36) are respectively fixedly connected to first telescopic rods (39), and the inner ends of the two first telescopic rods (39) are fixedly connected to a push plate (32), and the outer surfaces of the first telescopic rods (39) are respectively covered with first springs (40) that match the push plates (32); the middle parts of the U-shaped blocks (36) are respectively rotatably connected to fixed pulleys (38), and the outer surfaces of the fixed pulleys (38) are respectively covered with pulleys (40) that match the push plates (32). The outer surface of the outer cylinder (35) is fixedly connected to a reset seat (76), and the lower end surface of the operating table (4) is also fixedly connected to four evenly distributed large guide rods (74). The reset seat (76) is sleeved on the outer surface of the large guide rod (74), and the outer surface of the large guide rod (74) is also sleeved with large springs (75) matching with the reset seat (76).

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