CN214539611U

CN214539611U - Concrete slump tester

Info

Publication number: CN214539611U
Application number: CN202120169964.4U
Authority: CN
Inventors: 韩小华; 何小强; 张磊; 李建立; 何洪亮; 赵强; 韩慧强
Original assignee: Beijing Tiejian Yongtai New Building Material Co ltd
Current assignee: Beijing Tiejian Yongtai New Building Material Co ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2021-10-29
Anticipated expiration: 2031-01-21

Abstract

The application relates to a concrete slump tester, which comprises a bottom plate and a slump testing cylinder, wherein two opposite and vertically arranged side baffles are arranged on the bottom plate, a transverse plate is connected between one ends of the two side baffles, which are far away from the bottom plate, the slump testing cylinder is arranged on the bottom plate and positioned between the two side baffles, a group of clamping mechanisms are respectively arranged between the two side baffles and the slump testing cylinder, the clamping mechanisms comprise clamping semi-rings which move along the horizontal direction and clamp the slump testing cylinder and a supporting component which is connected to the side baffle in a vertical sliding manner and is used for supporting the clamping semi-rings, the clamping semi-rings in the two groups of clamping mechanisms are mutually butted and combined to form a fastening hole for fastening the slump testing cylinder, and the transverse plate is provided with a lifting mechanism for vertically and directionally lifting the slump test cylinder. The slump testing device can be used for conveniently and accurately improving the slump testing cylinder and reducing the experimental data error.

Description

Concrete slump tester

Technical Field

The application relates to the technical field of concrete slump detection, in particular to a concrete slump tester.

Background

Pouring concrete into a horn-shaped slump bucket with an upper opening of 100mm, a lower opening of 200mm and a height of 300mm for three times, uniformly impacting 25 times along the wall of the bucket from outside to inside by using a tamping hammer after each filling, tamping and leveling. And then the barrel is pulled up, the concrete generates a collapse phenomenon due to self weight, and the height of the highest point of the collapsed concrete is subtracted by the height of the barrel, namely the collapse degree.

In the prior art, slump tests on concrete are mainly manually promoted through a slump test cylinder, and the slump test cylinder cannot be quickly and accurately promoted at every time when being manually promoted, so that errors are easily generated on experimental data.

SUMMERY OF THE UTILITY MODEL

For the convenience of an accurate promotion slump test section of thick bamboo, reduce experimental data's error, this application provides a concrete slump tester.

The application provides a concrete slump tester adopts following technical scheme:

a concrete slump tester comprises a bottom plate and a slump testing cylinder, wherein two opposite and vertically arranged side baffles are arranged on the bottom plate, a transverse plate is connected between one ends of the two side baffles, which are far away from the bottom plate, the slump testing cylinder is arranged on the bottom plate and positioned between the two side baffles, a group of clamping mechanisms are respectively arranged between the two side baffles and the slump testing cylinder, the clamping mechanisms comprise clamping semi-rings which move along the horizontal direction and clamp the slump testing cylinder and a supporting component which is connected to the side baffle in a vertical sliding manner and is used for supporting the clamping semi-rings, the clamping semi-rings in the two groups of clamping mechanisms are mutually butted and combined to form a fastening hole for fastening the slump testing cylinder, and the transverse plate is provided with a lifting mechanism for vertically and directionally lifting the slump test cylinder.

Through adopting above-mentioned technical scheme, adopt two centre gripping semi-rings that the horizontal direction removed to carry out the centre gripping to the slump test section of thick bamboo, support the centre gripping semi-ring through supporting component, guarantee the centre gripping stability of centre gripping semi-ring to the slump test section of thick bamboo, adopt hoist mechanism, carry out directional vertical promotion to the slump test section of thick bamboo, because supporting component can only be along the directional slip of direction of height of side shield, make the slump test section of thick bamboo also directional upwards promote when promoting from this, the accurate promotion slump test section of thick bamboo of being convenient for has reduced the error of experimental data.

The present application may be further configured in a preferred example to: the supporting assembly comprises a supporting sleeve which is vertically connected to the side baffle in a sliding mode, a supporting rod which is sleeved in the supporting sleeve and slides in a reciprocating mode along the axis direction of the supporting sleeve, and a fixing piece which is used for enabling the supporting rod and the supporting sleeve to be fixed relatively, wherein the supporting rod is located at one end, outside the supporting sleeve, of the supporting rod and one end, away from the slump testing cylinder, of the clamping semi ring.

By adopting the technical scheme, the support rod can be arranged in the support sleeve in a reciprocating sliding manner, the support rod is convenient to drive the clamping half rings to be close to or far away from the slump test barrel, the support rod drives the clamping half rings to clamp the slump test barrel when being close to the slump test barrel, the support rod and the support sleeve are fixed by the fixing piece, and therefore the support rod, the support sleeve and the clamping half rings are connected into a stable whole.

The present application may be further configured in a preferred example to: the utility model discloses a support sleeve, including support sleeve, elastic piece, support sleeve, bracing piece, screw sleeve, support sleeve, and the hole of stepping down has been seted up on the support sleeve's the outer wall, the support sleeve is connected with the flexure strip in the position department in the hole of stepping down, the flexure strip has set firmly the elastic block towards one side of bracing piece, the flexure strip is toward supporting the intraductal deformation of cover and making the elastic block laminate in the outer wall of bracing piece, the mounting includes threaded sleeve, support sleeve's periphery wall is provided with the external screw thread in the position department circumference in the hole of stepping down, threaded sleeve cover locates on the support sleeve and extrudees the flexure strip, threaded sleeve and support sleeve threaded connection.

Through adopting above-mentioned technical scheme, rotate the threaded sleeve pipe, make the threaded sleeve pipe carry out the screw thread transmission along support sleeve's axis direction, the threaded sleeve pipe is pressing the flexure strip when removing, make the flexure strip to stepping down downthehole deformation, compress tightly the bracing piece through the elastic block after the flexure strip deformation, because threaded connection has self-locking function between threaded sleeve pipe and the support sleeve pipe, when removing the exogenic action, the cover that the threaded sleeve pipe can be stable is established on the support sleeve pipe, thereby guarantee the compact action of elastic block to the bracing piece.

The present application may be further configured in a preferred example to: guide grooves are formed in one side, opposite to the side baffles, of each of the two side baffles, the guide grooves extend along the height direction of the side baffles, guide blocks are fixedly arranged at one ends, far away from the slump test barrel, of the support sleeves, and the guide blocks are located in the guide grooves and slide along the extension of the guide grooves.

By adopting the technical scheme, the supporting sleeve slides along the specific track of the guide groove while vertically sliding, so that the supporting sleeve can be ensured to directionally slide.

The present application may be further configured in a preferred example to: the lifting mechanism comprises two lifting rods, a lifting plate and a lifting assembly, wherein the two lifting rods are vertically arranged in the guide grooves in a penetrating mode respectively and are connected with the two guide blocks respectively, the lifting plate is fixedly arranged between the two lifting rods and is located above the transverse plate, and the lifting assembly is used for controlling the lifting plate to vertically move in the direction away from or close to the transverse plate.

Through adopting above-mentioned technical scheme, adopt lifting unit, will promote the board and remove toward the direction of keeping away from the diaphragm, promote the board when removing, take two support sleeves simultaneously through two lifting rods and slide in the guide way to the completion is to the promotion work of slump test section of thick bamboo.

The present application may be further configured in a preferred example to: the interval has set firmly two otic placodes on the diaphragm, the lifting unit includes that the gyration is connected in the threaded rod between two otic placodes, the threaded rod includes first screw thread section and the second screw thread section that screw thread opposite direction set up, threaded connection has first screw thread piece in the first screw thread section, threaded connection has second screw thread piece in the second screw thread section, first screw thread piece is close to each other or keeps away from the setting with second screw thread piece, it has first jacking rod to articulate between first screw thread piece and the lifting plate, it has second jacking rod to articulate between second screw thread piece and the lifting plate.

Through adopting above-mentioned technical scheme, the screw thread opposite direction who adopts first screw thread section and second screw thread section for first screw thread piece and second screw thread piece are close to each other or keep away from on the threaded rod, and when first screw thread piece and second screw thread piece were close to each other, first liftout rod and second liftout rod can draw in each other and gradual tend to vertically, in this in-process alright remove to the direction of keeping away from the diaphragm in order to push up the liftout plate, thereby realize the promotion to slump test section of thick bamboo.

The present application may be further configured in a preferred example to: one end of the threaded rod extends out of the lug plate and is fixedly connected with a rotating shaft, and a hand wheel is fixedly arranged on the rotating shaft.

Through adopting above-mentioned technical scheme, adopt the hand wheel to be convenient for control the axis of rotation, take the threaded rod to rotate between two otic placodes through the axis of rotation.

The present application may be further configured in a preferred example to: the elastic pieces are arranged in a plurality of and are evenly distributed in the circumferential direction of the axis direction of the supporting sleeve, and the abdicating holes are arranged in a plurality of corresponding to the elastic pieces.

Through adopting above-mentioned technical scheme, the flexure strip is evenly distributed around supporting sleeve's axis direction circumference for the bracing piece is even at the intraductal stress point of supporting sleeve, improves the stability of bracing piece in supporting sleeve.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the reciprocating screw rod is controlled to rotate in the guide groove of the side baffle through the driving assembly, the reciprocating screw rod is vertically arranged, the thread sleeve is only arranged in the guide groove in a reciprocating mode along the axis direction of the reciprocating screw rod, the thread sleeve synchronously lifts the slump test cylinder upwards through the linkage assembly while moving vertically, and the slump test cylinder is lifted upwards directionally due to the directional movement of the thread sleeve, so that the slump test cylinder is lifted accurately, and errors of experimental data are reduced;

2. through rotating positioning bolt, can realize that positioning bolt moves down or shifts up in the vertical of location threaded hole, positioning bolt moves down and makes its tip compress tightly in the tank bottom of sliding groove, and the board that slides can't freely slide on the bottom plate this moment, realizes the location after offside baffle slides from this.

Drawings

FIG. 1 is a schematic structural diagram of a slump tester according to an embodiment of the present application;

FIG. 2 is a schematic partial exploded view of an embodiment of the present application showing a support sleeve, threaded sleeve and support rod;

FIG. 3 is a schematic cross-sectional view of an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a lifting assembly shown in the embodiment of the present application;

fig. 5 is a schematic view showing a connection structure between the lifting plate, the hinge base, the first lift lever and the second lift lever in the embodiment of the present application.

In the figure, 1, a bottom plate; 2. a slump test cartridge; 21. a funnel; 3. a side dam; 31. a transverse plate; 311. an ear plate; 32. a guide groove; 41. clamping the half rings; 42. a support assembly; 421. a support sleeve; 4211. a hole of abdication; 422. a support bar; 423. a threaded sleeve; 5. an elastic sheet; 51. an elastic block; 6. a slide plate; 61. a guide block; 71. a lifting bar; 72. a lifting plate; 721. a hinged seat; 73. a lifting assembly; 731. a threaded rod; 7311. a first thread segment; 7312. a second thread segment; 732. a first thread block; 733. a second thread block; 734. a first lift pin; 735. a second lift pin; 7351. a lower hinge section; 7352. an upper hinge portion; 8. a rotating shaft; 81. a hand wheel; 9. and (4) hinging the shaft.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

The embodiment of the application discloses concrete slump tester, refer to fig. 1, including bottom plate 1 and slump test section of thick bamboo 2, bottom plate 1 sets up to the rectangle, and slump test section of thick bamboo 2 is placed in the central point department of putting of 1 upper surface of bottom plate, and slump test section of thick bamboo 2 is vertical to be placed, and the upper end of slump test section of thick bamboo 2 sets up to the osculum, and the upper end of slump test section of thick bamboo 2 has set firmly funnel 21, and funnel 21 sets up with slump test section of thick bamboo 2 coaxial.

Referring to fig. 1, two side shield 3 are arranged on a bottom plate 1, the two side shield 3 are arranged vertically and oppositely, the two side shield 3 are arranged at intervals along the width direction of the bottom plate 1, a slump testing cylinder 2 is arranged between the two side shield 3, a transverse plate 31 is connected between the upper ends of the two side shield 3, and the two side shield 3 and the transverse plate 31 are integrally arranged in a U shape.

Referring to fig. 1 and 2, a group of clamping mechanisms are symmetrically arranged between the two side baffles 3 and the slump testing cylinder 2 respectively, each clamping mechanism comprises a clamping half ring 41 and a supporting component 42, the clamping half rings 41 are matched with the upper end of the slump testing cylinder 2, the inner curved surfaces of the clamping half rings 41 are attached to the outer wall of the upper end of the slump testing cylinder 2, the clamping half rings 41 in the two groups of clamping mechanisms are mutually butted and combined to form a fastening hole, and the fastening hole is sleeved at the upper end of the slump testing cylinder 2 and is used for clamping.

Referring to fig. 1 and 2, the support assembly 42 includes a support sleeve 421, a support rod 422 and a fixing member, the support sleeve 421 is located between the side shield 3 and the slump testing cylinder 2, the support sleeve 421 is horizontally arranged, and the support sleeve 421 is perpendicular to the side shield 3. One end of the support rod 422 is fixedly connected to the outer curved surface of the clamp half ring 41, and the other end of the support rod 422 is sleeved in the support sleeve 421 and is slidably disposed along the axial direction of the support sleeve 421. The grip half rings 41 are carried closer to or farther from the slump test cartridge 2 by the reciprocating movement of the support rod 422 within the support sleeve 421.

Referring to fig. 1 and 2, a plurality of yielding holes 4211 are formed in the outer wall of one end of the support sleeve 421, which is far away from the side baffle 3, and the plurality of yielding holes 4211 are circumferentially and uniformly distributed around the axis direction of the support sleeve 421. The support sleeve 421 has set firmly the flexure strip 5 in the position department of the hole 4211 of stepping down, and the flexure strip 5 sets up with the hole 4211 one-to-one of stepping down, and the one end fixed connection of flexure strip 5 is in the hole 4211 of stepping down on the lateral wall, and the flexure strip 5 sets up to extending in the axis direction that is on a parallel with the support sleeve 421, and the flexure strip 5 keeps away from its one end of being connected with the support sleeve 421 and sets up towards the axis direction slope of keeping away from the support sleeve 421. An elastic block 51 is fixedly arranged at one end of the elastic sheet 5, which is inclined out of the yielding hole 4211, and the elastic block 51 is positioned on one side of the elastic sheet 5, which faces the support sleeve 421. The mounting includes threaded sleeve 423, and the periphery wall of support sleeve 421 is provided with the external screw thread in the position department circumference of stepping down hole 4211, and threaded sleeve 423 cover is located on support sleeve 421 and with support sleeve 421 threaded connection, and a plurality of flexure strips 5 are located threaded sleeve 423. When the threaded sleeve 423 advances along the axial thread of the support sleeve 421, the inner wall of the threaded sleeve 423 extrudes the plurality of elastic pieces 5, so that the elastic pieces 5 deform in the yielding hole 4211 and the elastic block 51 is attached to the outer wall of the support rod 422, thereby fixing the support rod 422 in the support sleeve 421.

Referring to fig. 3, the guide grooves 32 are respectively formed in the opposite sides of the two side guards 3, the guide grooves 32 extend along the height direction of the side guards 3, the notches of the guide grooves 32 on the two side guards 3 are opposite, two guide grooves 32 are formed in the same side guard 3, and the two guide grooves 32 are arranged at intervals along the length direction of the side guards 3. One end of the support sleeve 421 far away from the slump test tube 2 is fixedly provided with a sliding plate 6, the length direction of the sliding plate 6 is consistent with the length direction of the side baffle 3, the sliding plate 6 is attached to one side of the side baffle 3 and is fixedly provided with two guide blocks 61, the two guide blocks 61 and the two guide grooves 32 are arranged in a one-to-one correspondence manner, and the guide blocks 61 are located in the guide grooves 32 and are arranged in a sliding manner along the extending direction of the guide grooves 32.

Referring to fig. 3 and 4, the transverse plate 31 is provided with a lifting mechanism, the lifting mechanism includes four lifting rods 71, a lifting plate 72 and a lifting assembly 73, the lifting rods 71 are arranged corresponding to the guide slots 32 on the side guards 3, the lifting rods 71 are located in the guide slots 32, one end of each lifting rod 71 is fixedly connected with the guide block 61, and the other end of each lifting rod 71 vertically extends upward and penetrates through the side guards 3. The lifting plate 72 is positioned above the transverse plate 31, the lifting plate 72 is horizontally arranged, and the upper ends of the four lifting rods 71 extend out of the side baffle 3 and are fixedly connected to the lower surface of the lifting plate 72.

Referring to fig. 3 and 4, the lifting assembly 73 is disposed between the lifting plate 72 and the transverse plate 31, the lifting assembly 73 includes a threaded rod 731, a first threaded block 732, a second threaded block 733, a first lifting rod 734 and a second lifting rod 735, two lug plates 311 are fixedly disposed on the upper surface of the transverse plate 31, the two lug plates 311 are disposed at intervals along the length direction of the transverse plate 31, the threaded rod 731 is disposed between the two lug plates 311, the axial direction of the threaded rod 731 is the same as the length direction of the transverse plate 31, and two ends of the threaded rod 731 are respectively connected to the opposite side walls of the two lug plates 311 in a rotating manner. The threaded rod 731 includes a first threaded section 7311 and a second threaded section 7312, the first threaded section 7311 and the second threaded section 7312 are oppositely threaded, a first threaded block 732 is corresponding to and threadedly connected to the first threaded section 7311, a second threaded block 733 is corresponding to and threadedly connected to the second threaded section 7312, and the first threaded block 732 and the second threaded block 733 are disposed close to or away from each other.

Referring to fig. 4 and 5, the first lifting rod 734 is disposed between the first screw block 732 and the lifting plate 72, the second lifting rod 735 is disposed between the second screw block 733 and the lifting plate 72, a hinge seat 721 is fixedly disposed on one side of the lifting plate 72 facing the cross plate 31, the hinge seat 721 is U-shaped, one side of the hinge seat 721 facing away from the open end thereof is fixedly connected to the lifting plate 72, the first lifting rods 734 are disposed in two, the two first lifting rods 734 are respectively disposed on two opposite sides of the first screw block 732, one end of the first lifting rod 734 is hinged to the first screw block 732, and the other end of the first lifting rod 734 is disposed in the hinge seat 721.

Referring to fig. 4 and 5, the second lifting rod 735 includes a lower hinge portion 7351 and an upper hinge portion 7352 arranged in a U shape, the second screw block 733 is located in an open end of the lower hinge portion 7351, two opposite sides of the second screw block 733 are respectively hinged to opposite side walls of the lower hinge portion 7351, one end of the upper hinge portion 7352 is fixedly connected to an end of the lower hinge portion 7351 away from the open end, and the other end of the upper hinge portion 7352 is located in the hinge seat 721 and between the two first lifting rods 734. The hinge seat 721 is hinged with a hinge shaft 9, two ends of the hinge shaft 9 after penetrating through the upper hinge part 7352 and the two first lifting rods 734 are respectively connected with the opposite side walls in the hinge seat 721 in a rotating manner, and the hinge shaft 9 is fixedly connected with the first lifting rods 734 and the upper hinge part 7352.

Referring to fig. 4 and 5, as the first and second screw blocks 732 and 733 are moved closer to each other, the first and

second lift rods

734 and 735 are gradually moved toward the vertical direction, and the first and

second lift rods

734 and 735 are lifted up against the lift plate 72 while being moved toward the vertical direction.

Referring to fig. 4, one end of the threaded rod 731 extends out of the ear plate 311 and is fixedly connected with a rotating shaft 8, and a hand wheel 81 is fixedly arranged on the rotating shaft 8.

The implementation principle of the embodiment is as follows: when the slump test barrel 2 needs to be lifted, the hand wheel 81 is manually shaken to enable the hand wheel 81 to drive the rotating shaft 8 to rotate, the rotating shaft 8 drives the threaded rod 731 to rotate, when the threaded rod 731 rotates, the first threaded block 732 and the second threaded block 733 approach each other, under the action of the mutual approach of the first threaded block 732 and the second threaded block 733, the first lifting rod 734 and the second lifting rod 735 are also mutually gathered and gradually tend to be vertical, in the process, the first lifting rod 734 and the second lifting rod 735 push up the lifting plate 72 to move, the lifting plate 72 pulls the guide block 61 to move up in the guide groove 32 vertically through the lifting rod 71 while moving, the guide block 61 drives the slump test barrel 2 to move upwards through the support sleeve 421 and the support rod 422, and therefore the slump test barrel 2 is lifted upwards directionally, and the experiment is guaranteed to be smoothly carried out, the accuracy of the experiment is also ensured.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a concrete slump tester, includes bottom plate (1) and slump test section of thick bamboo (2), its characterized in that: be provided with two relative and vertical side shield (3) that set up on bottom plate (1), two be connected with diaphragm (31) between the one end of bottom plate (1) is kept away from in side shield (3), slump test section of thick bamboo (2) are placed on bottom plate (1) and are located two between side shield (3), two be provided with a set of fixture between side shield (3) and slump test section of thick bamboo (2) respectively, fixture includes along the horizontal direction removal and carry out centre gripping semi-ring (41) of centre gripping and vertical sliding connection on side shield (3) and be used for carrying out the supporting subassembly (42) that support centre gripping semi-ring (41), two sets of centre gripping semi-ring (41) among the fixture dock each other and close and enclose into the fastening hole that is used for fastening slump test section of thick bamboo (2), be provided with the hoist mechanism that is used for carrying out vertical directional promotion to slump test section of thick bamboo (2) on diaphragm (31) .

2. The concrete slump tester according to claim 1, wherein: the supporting assembly (42) comprises a supporting sleeve (421) which is vertically connected to the side baffle (3) in a sliding mode, a supporting rod (422) which is sleeved in the supporting sleeve (421) and slides in a reciprocating mode along the axis direction of the supporting sleeve (421), and a fixing piece which is used for enabling the supporting rod (422) and the supporting sleeve (421) to be fixed relatively, wherein one end, located outside the supporting sleeve (421), of the supporting rod (422) is fixedly connected with one end, away from the slump testing cylinder (2), of the clamping half ring (41).

3. A concrete slump tester according to claim 2, wherein: offer hole of stepping down (4211) on the outer wall of support sleeve (421), support sleeve (421) are connected with flexure strip (5) in the position department of hole of stepping down (4211), flexure strip (5) set firmly elastic block (51) towards one side of bracing piece (422), flexure strip (5) toward support sleeve (421) internal deformation and make elastic block (51) laminate in the outer wall of bracing piece (422), the mounting includes threaded sleeve (423), the periphery wall of support sleeve (421) is provided with the external screw thread in the position department circumference of hole of stepping down (4211), threaded sleeve (423) cover is located on support sleeve (421) and is extruded flexure strip (5), threaded sleeve (423) and support sleeve (421) threaded connection.

4. A concrete slump tester according to claim 2, wherein: guide grooves (32) are respectively formed in one opposite side of the two side baffles (3), the guide grooves (32) extend along the height direction of the side baffles (3), a guide block (61) is fixedly arranged at one end, far away from the slump test cylinder (2), of the support sleeve (421), and the guide block (61) is located in the guide grooves (32) and slides along the extension of the guide grooves (32).

5. The concrete slump tester according to claim 4, wherein: the lifting mechanism comprises two lifting rods (71) which vertically penetrate through the guide grooves (32) respectively and are connected with the two guide blocks (61) respectively, a lifting plate (72) which is fixedly arranged between the two lifting rods (71) and is positioned above the transverse plate (31), and a lifting assembly (73) which is used for controlling the lifting plate (72) to vertically move in the direction far away from or close to the transverse plate (31).

6. The concrete slump tester according to claim 5, wherein: two otic placodes (311) have set firmly at the interval on diaphragm (31), lifting unit (73) are including gyration connection threaded rod (731) between two otic placodes (311), threaded rod (731) are including first screw thread section (7311) and second screw thread section (7312) that the screw thread direction set up in opposite directions, threaded connection has first screw thread piece (732) on first screw thread section (7311), threaded connection has second screw thread piece (733) on second screw thread section (7312), first screw thread piece (732) and second screw thread piece (733) are close to each other or keep away from the setting, it has first lifting rod (734) to articulate between first screw thread piece (732) and lifting plate (72), it has second lifting rod (735) to articulate between second screw thread piece (733) and lifting plate (72).

7. The concrete slump tester according to claim 6, wherein: one end of the threaded rod (731) extends out of the ear plate (311) and is fixedly connected with a rotating shaft (8), and a hand wheel (81) is fixedly arranged on the rotating shaft (8).

8. A concrete slump tester according to claim 3, wherein: the elastic pieces (5) are arranged in a plurality of, the elastic pieces (5) are circumferentially and uniformly distributed around the axis direction of the supporting sleeve (421), and the yielding holes (4211) are arranged in a plurality of corresponding to the elastic pieces (5).