CN215985487U

CN215985487U - Concrete test piece bending resistance testing machine

Info

Publication number: CN215985487U
Application number: CN202122189525.2U
Authority: CN
Inventors: 张庆军; 常昊; 卢萌柯
Original assignee: Zhengzhou Xingye Commercial Concrete Co ltd
Current assignee: Zhengzhou Xingye Commercial Concrete Co ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2022-03-08
Anticipated expiration: 2031-09-10

Abstract

The utility model discloses an anti-bending testing machine for a concrete test piece, which relates to the field of concrete performance testing and aims to solve the problems that the operation of a centering process is complicated and concrete fragments are time-consuming and labor-consuming to clean in the prior art; sliding connection's splashproof lid can cover the concrete sample when experimental on the vaulting pole, prevents that the piece from splashing, and the piece spatters and covers the back whereabouts and fall into the collecting box through hopper down in, and the clastic clearance of being convenient for reduces testing personnel intensity of labour, and can prevent that the piece from hindering the people.

Description

Concrete test piece bending resistance testing machine

Technical Field

The utility model relates to the field of concrete performance testing, in particular to a concrete sample bending resistance testing machine.

Background

Breaking strength: the unit area of the material bears the ultimate breaking stress when bending moment is applied; also known as flexural strength, modulus of rupture; whether the proportion of the particles is reasonable, the size and the number of air holes, whether the organization structure is uniform and consistent, whether the combination among the particles is firm and the like are important factors for determining the size of the flexural strength; compressive strength: when the rock mass and the soil mass are damaged under the action of unidirectional pressure, the load borne on the unidirectional area is reduced; in short, it is a limit of fracture resistance and a limit of compression resistance.

Chinese patent CN202020066251.0 discloses a concrete bending resistance testing machine, which adopts the technical scheme that the concrete bending resistance testing machine comprises a base, a test bed, a supporting seat, a supporting column, a cross beam, a hydraulic cylinder and an upper pressing seat, wherein the center of the test bed and the center of the upper pressing seat are on the same vertical line, a chute is arranged on the supporting seat and positioned at the top of the test bed, a graduated scale is arranged at one side of the supporting seat close to an operator, a lower pressing seat is arranged on the chute in a sliding manner, a fixed block is arranged at one side of the base far away from the graduated scale and right opposite to the test bed, supporting plates are oppositely arranged at two sides of the fixed block, a double-shaft motor is arranged at the top of the fixed block, a screw rod is coaxially arranged on an output shaft of the double-shaft motor, the other end of the screw rod is rotatably connected onto the supporting plates, the screw rod is parallel to the supporting seat, the screw rod has opposite thread directions, and a guide rod is arranged between the two supporting plates, a push plate is arranged on the screw rod, the push plate penetrates through the guide rod, and the bottom of the push plate is higher than the top of the lower pressing seat; this technical scheme is at centering in-process complex operation, and appears the deviation because of reading error easily, and when concrete test piece breaks off in the test process, the concrete piece can splash, and the clearance gets up to waste time and energy.

Disclosure of Invention

In view of the problems in the prior art, the utility model discloses a concrete sample bending resistance testing machine which adopts the technical scheme that the concrete sample bending resistance testing machine comprises a testing platform, a collecting box and a control box, wherein a top cover is connected above the testing platform through a support rod, a hydraulic rod is arranged on the top cover, a pushing-out section of the hydraulic rod is connected with a splash-proof cover in a sliding mode, a pressing plate is arranged at the end part of the splash-proof cover, the splash-proof cover can effectively prevent scraps from splashing, workers are accidentally injured and convenient to clean the scraps, sliding plates are arranged on two sides of the splash-proof cover, sliding holes are formed in the sliding plates, the support rod is connected in the sliding holes in a sliding mode, a limiting mechanism is arranged between the splash-proof cover and the top cover, the limiting mechanism can prevent the splash-proof cover from falling after the splash-proof cover is lifted, and manual operation on the testing platform 1 is facilitated; the test platform is provided with a through hole, the hydraulic rod is arranged on a vertical axis of the center of the through hole, a sliding rod is arranged in the through hole and is a triangular rod, one edge of the sliding rod is vertically upward and can effectively reduce the residual quantity of scraps and dust on the sliding rod, the sliding rod is connected with a support table in a sliding way, the support table is provided with a sliding hole, the sliding hole corresponds to the position of the sliding rod and is matched with the size of the sliding rod, the end part of the sliding hole is provided with a wiping part, the wiping part can wipe the sliding rod to prevent the sliding hole from being blocked in the sliding process, the side surface of the support table is provided with a connecting block, the connecting block is provided with a threaded hole, the side wall of the through hole is provided with a sliding groove for the sliding of the connecting block, the sliding groove is internally connected with a screw rod, the left thread and the right thread of the screw rod are reverse, the two support tables are respectively meshed with the two threads of the screw rod, the end part of the screw rod is provided with a hand wheel, the screw rod is driven by the hand wheel to rotate, so that the supporting platform can move oppositely at a constant speed, and the centering process is free from error; the through-hole below is connected with down the hopper, there is the collecting box hopper below down, and the piece can be followed down in the hopper directly falls into the collecting box, the concentrated clearance of being convenient for, the other control box that is equipped with of test platform bottom surface landing leg, there is hydraulic means in the control box, hydraulic means with the hydraulic stem links to each other.

As a preferred technical scheme of the utility model, the splash cover is a square shell with a through bottom, the position of the splash cover corresponds to that of the through hole, the splash cover is matched with the through hole in size, and the through hole can be covered by the splash cover to prevent scraps from splashing; the splash-proof cover is made of acrylic materials, is good in wear resistance and is convenient to observe the state of the concrete test block from the outside.

As a preferred technical scheme of the utility model, an air cylinder is arranged between the sliding plate and the test platform, a cylinder barrel of the air cylinder is communicated with the outside, and a falling splash cover can be buffered through the air cylinder, so that the equipment damage caused by the over-high falling speed is prevented.

As a preferred technical scheme of the utility model, the limiting mechanism comprises a limiting rod, a pawl and a rotating block, the limiting rod is arranged above the splash-proof cover, a limiting tooth is arranged on the side surface of the limiting rod, a limiting hole for the limiting rod to slide is formed in the top cover, the pawl is connected with the limiting hole in an inner shaft mode, the pawl corresponds to the limiting tooth in position and is matched with the limiting tooth in size, a torsion spring is arranged at the shaft connecting position, a shaft sleeve of the pawl extends out of the top cover and is connected with the rotating block, the limiting rod is limited through the pawl, the splash-proof cover can be limited after being lifted, the splash-proof cover is prevented from falling, and manual operation in the through hole is facilitated.

In a preferred embodiment of the present invention, the support platform is an L-shaped block.

In a preferred embodiment of the present invention, the wiper is a rubber block or a brush.

The utility model has the beneficial effects that: according to the utility model, the hand wheel is rotated to rotate the screw rods, so that the support tables synchronously move in opposite directions, the operation is simple and convenient, no error exists in the centering process, the sliding rod is wiped by the wiping part in the moving process, the sliding hole is prevented from being blocked by scraps or dust on the sliding rod, and the residual quantity of the scraps and the dust on the sliding rod can be further effectively reduced by the triangular rod type sliding rod; sliding connection's splashproof lid can cover the concrete sample when experimental on the vaulting pole, prevents that the piece from splashing, and the piece spatters and covers the back whereabouts and fall into the collecting box through hopper down in, and the clastic clearance of being convenient for reduces testing personnel intensity of labour, and can prevent that the piece from hindering the people.

Furthermore, an air cylinder is arranged between the sliding plate of the splash-proof cover and the test platform, so that the splash-proof cover can be decelerated and buffered in the falling process, and the damage of equipment caused by high-speed collision is prevented.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic top view of the testing platform of the present invention;

FIG. 3 is a schematic view of a support platform according to the present invention;

fig. 4 is a schematic structural view of the limiting mechanism of the present invention.

In the figure: 1-test platform, 2-brace rod, 3-top cover, 4-splash cover, 5-hydraulic rod, 6-limit rod, 7-cylinder, 8-hand wheel, 9-blanking bucket, 10-collecting box, 11-control box, 12-slide bar, 13-support table, 14-screw, 15-slide hole, 16-limit tooth, 17-rotary block.

Detailed Description

Example 1

As shown in fig. 1 to 4, the utility model discloses a concrete sample bending resistance testing machine, which adopts the technical scheme that the concrete sample bending resistance testing machine comprises a testing platform 1, a collecting box 10 and a control box 11, wherein a top cover 3 is connected above the testing platform 1 through a support rod 2, a hydraulic rod 5 is arranged on the top cover 3, a pushing section of the hydraulic rod 5 is connected with a splash-proof cover 4 in a sliding manner, sliding plates are arranged at two sides of the splash-proof cover 4, sliding holes are arranged on the sliding plates, the support rod 2 is connected in the sliding holes in a sliding manner, a limiting mechanism is arranged between the splash-proof cover 4 and the top cover 3, the splash-proof cover 4 can slide up and down along the support rod 2 through the sliding plates, and can be limited by the limiting mechanism after being lifted to a certain height so as to prevent the splash-proof cover from falling down; the testing platform 1 is provided with a through hole, the hydraulic rod 5 is arranged on a vertical axis of the center of the through hole, a sliding rod 12 is arranged in the through hole, the sliding rod 12 is a triangular prism, one edge of the triangular prism is vertically upward, the triangular prism can directly slide down when chips fall on the sliding rod 12 to prevent the chips from remaining on the sliding rod 12, the sliding rod 12 is connected with a supporting table 13 in a sliding way, the supporting table 13 is provided with a sliding hole, the sliding hole corresponds to the sliding rod 12 in position and is matched with the sliding rod in size, the end part of the sliding hole is provided with a wiping part, the side surface of the supporting table 13 is provided with a connecting block, the connecting block is provided with a threaded hole, the side wall of the through hole is provided with a sliding groove for the connecting block to slide, the sliding groove is internally connected with a screw 14, the left thread and the right thread of the screw 14 are reversed, the supporting tables 13 are provided with two connecting blocks which are respectively meshed with the two threads of the screw 14, a hand wheel 8 is arranged at the end part of the screw 14, and the hand wheel 8 is rotated to drive the screw 14 to rotate, so that the support platform 13 can slide oppositely along the slide rod 12 at a constant speed; hopper 9 is connected with down to the through-hole below, there is collecting box 10 hopper 9 below down, and the concrete piece can directly fall into collecting box 10 along hopper 9 down, is convenient for clastic collection, reduces artifical intensity of labour, the other control box 11 that is equipped with of 1 bottom surface landing leg of test platform, there is hydraulic means in the control box 11, hydraulic means with hydraulic stem 5 links to each other.

As a preferred technical scheme of the utility model, the splash cover 4 is a square shell with a through bottom, the position of the splash cover 4 corresponds to that of the through hole, the size of the splash cover 4 is matched with that of the through hole, the through hole can be completely covered by the splash cover 4, and after concrete fragments splash onto the splash cover 4 and are intercepted by the splash cover 4, the concrete fragments fall into the through hole and enter the blanking hopper 9; the splash-proof cover 4 is made of acrylic materials.

As a preferred technical scheme of the utility model, an air cylinder 7 is arranged between the sliding plate and the test platform 1, a cylinder barrel of the air cylinder 7 is communicated with the outside, and internal air can buffer the splash cover 4 in the exhaust process of the cylinder barrel of the air cylinder 7.

As a preferred technical scheme of the utility model, the limiting mechanism comprises a limiting rod 6, a pawl and a rotating block 17, the limiting rod 6 is arranged above the splash-proof cover 4, a limiting tooth 16 is arranged on the side surface of the limiting rod 6, a limiting hole for the limiting rod 6 to slide is arranged on the top cover 3, the pawl is connected with the limiting hole in an inner shaft, the pawl and the limiting tooth 16 are corresponding in position and matched in size, a torsion spring is arranged at the shaft connecting part, and a shaft sleeve of the pawl extends out of the top cover 3 and is connected with the rotating block 17; spacing tooth 16 is triangle-shaped tooth, upwards stimulates gag lever post 6, and the inclined plane extrusion pawl of spacing tooth 16 can make the pawl rotate, and after the pawl crossed one-level tooth, the pawl resets under the torsional spring effect, withstands spacing tooth 16 below, prevents that splashproof lid 4 from dropping.

In a preferred embodiment of the present invention, the support base 13 is an L-shaped block.

In a preferred embodiment of the present invention, the wiper is a brush.

The working principle of the utility model is as follows: placing a concrete test block on a transverse section plate of a support table 13, rotating a hand wheel 8, driving a screw 14 to rotate by the hand wheel 8, enabling the support table 13 to slide oppositely along a slide rod 12, wiping the slide rod 12 by a wiping piece in the sliding process, lifting a limiting rod 6 in a short distance after a vertical section plate of the support table 13 clamps the concrete test block tightly, rotating a rotating block 17, releasing the limit of a pawl on a limiting groove 16, enabling a splash cover 4 to fall along a supporting rod 2, covering the concrete test block, buffering the splash cover 4 by an air cylinder 7 in the falling process, loosening the rotating block 17, resetting the pawl, extending a hydraulic rod 5 through a control box 11 for carrying out an anti-bending test, enabling concrete scraps to be splashed on the splash cover 4 and then fall down after the concrete test block breaks, enabling the concrete scraps to pass through a through hole and a discharging hopper 9 and fall into a collecting box 10, resetting the hydraulic rod 5, pulling the limiting rod 6 upwards, extruding the pawl by a limiting tooth 16, and enabling the pawl to rotate, the torsional spring holds power, and after rising to suitable height, the pawl resets under the torsional spring effect, and is spacing to gag lever post 6, and reverse rotation hand wheel 8 clears up the collection box 10 after the remaining piece in the through-hole, and the experiment finishes.

The mechanical connection according to the utility model is a conventional means used by the skilled person and can be suggested by limited trials and is common general knowledge.

Components not described in detail herein are prior art.

Although the present invention has been described in detail with reference to the specific embodiments, the present invention is not limited to the above embodiments, and various changes and modifications without inventive changes may be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.

Claims

1. The utility model provides a concrete sample bending test machine which characterized in that: the device comprises a test platform (1), a collection box (10) and a control box (11), wherein a top cover (3) is connected above the test platform (1) through a support rod (2), a hydraulic rod (5) is arranged on the top cover (3), a push-out section of the hydraulic rod (5) is connected with a splash-proof cover (4) in a sliding mode, sliding plates are arranged on two sides of the splash-proof cover (4), sliding holes are formed in the sliding plates, the support rod (2) is connected in the sliding holes in a sliding mode, and a limiting mechanism is arranged between the splash-proof cover (4) and the top cover (3); the testing platform (1) is provided with a through hole, the hydraulic rod (5) is arranged on a vertical axis of the center of the through hole, a sliding rod (12) is arranged in the through hole, the sliding rod (12) is a triangular prism, one edge of the triangular prism is vertically upward, a supporting table (13) is connected onto the sliding rod (12) in a sliding mode, a sliding hole is formed in the supporting table (13), the sliding hole corresponds to the sliding rod (12) in position and is matched with the sliding rod in size, a wiping part is arranged at the end part of the sliding hole, a connecting block is arranged on the side face of the supporting table (13), a threaded hole is formed in the connecting block, a sliding groove for the connecting block to slide is formed in the side wall of the through hole, a screw rod (14) is connected into the sliding groove in a shaft mode, the left thread and the right thread of the screw rod (14) are reversed, the supporting tables (13) are provided with two connecting blocks which are respectively meshed with the two threads of the screw rod (14), a hand wheel (8) is arranged at the end part of the screw rod (14); the device is characterized in that a discharging hopper (9) is connected below the through hole, a collecting box (10) is arranged below the discharging hopper (9), a control box (11) is arranged beside a supporting leg on the bottom surface of the test platform (1), a hydraulic device is arranged in the control box (11), and the hydraulic device is connected with the hydraulic rod (5).

2. The concrete specimen bending resistance testing machine of claim 1, characterized in that: the splash-proof cover (4) is a square shell with a through bottom, and the position of the splash-proof cover (4) corresponds to that of the through hole and is matched with the size of the through hole; the splash-proof cover (4) is made of acrylic materials.

3. The concrete specimen bending resistance testing machine of claim 1, characterized in that: an air cylinder (7) is arranged between the sliding plate and the test platform (1), and a cylinder barrel of the air cylinder (7) is communicated with the outside.

4. The concrete specimen bending resistance testing machine of claim 1, characterized in that: stop gear includes gag lever post (6), pawl and commentaries on classics piece (17), be equipped with splash proof lid (4) top gag lever post (6), gag lever post (6) side is opened there are spacing tooth (16), it has the confession to open on top cap (3) the gliding spacing hole of gag lever post (6), spacing downthehole shaft connection has the pawl, the pawl with spacing tooth (16) position is corresponding, size phase-match, and the pivot junction is equipped with the torsional spring, the axle sleeve of pawl extends top cap (3) and is connected with commentaries on classics piece (17).

5. The concrete specimen bending resistance testing machine of claim 1, characterized in that: the supporting platform (13) is an L-shaped block.

6. The concrete specimen bending resistance testing machine of claim 1, characterized in that: the wiping piece is a rubber block or a brush.