Concrete conveying capacity testing device for chute

Abstract

The utility model provides a concrete conveying capacity testing device of a chute. The testing device comprises a supporting bottom frame, a chute and a chute supporting frame, the chute supporting frame comprises a chute fixing frame, a limiting frame and a supporting rod, the limiting frame is vertically arranged on the supporting bottom frame, one end of the supporting rod is fixedly connected with the supporting bottom frame, the other end of the supporting rod is connected with the upper portion of the limiting frame, and a gradient adjusting rod is arranged on the limiting frame. One end of the chute fixing frame is rotationally connected with the end, away from the supporting rod, of the supporting bottom frame, the other end of the chute fixing frame extends upwards in an inclined mode and is erected on the gradient adjusting rod, the chute is installed on the chute fixing frame, at least two groups of chute hoop sleeve assemblies are fixedly installed on the chute fixing frame, and the chute is fixed in the chute hoop sleeve through a first bolt. The device is simple to assemble, the shape, gradient, roughness and material of the chute can be changed, and the requirement for testing the conveying capacity of concrete of a chute construction panel under different actual working conditions is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to water conservancy and hydropower engineering material test technical field especially relates to a concrete conveying capacity test device of chute. BACKGROUND

[0002] In the concrete construction of the rock-fill dam panel, the chute is widely used as a construction method of efficiently conveying concrete, adapting to complex terrain, reducing concrete segregation and stabilizing the conveying of concrete. When the concrete performance is poor or the process is not matched, segregation and bleeding are prone to occur in the chute conveying, which causes defects such as honeycomb and cavity after the concrete is poured, and reduces the compactness and strength of the panel. When the concrete fluidity is poor or the cohesion is insufficient, the chute may be blocked, the conveying is interrupted, the construction progress is delayed, the chute conveying difficulty is increased, the conveying speed is slowed down, and the overall construction efficiency is affected.

[0003] The current simulation test method for the chute sliding conveying capacity of concrete lacks relevant indoor test devices, and it is difficult to evaluate the chute sliding conveying capacity of concrete. Therefore, we design a test device to simulate the field construction conditions, test the chute conveying capacity of concrete, and according to the test results, propose feasible optimization measures and schemes to improve the field construction efficiency and ensure the performance of concrete. SUMMARY

[0004] The utility model discloses in order to solve the chute sliding conveying capacity test of concrete in prior art, lack relevant indoor test device, it is difficult to evaluate the chute sliding conveying capacity of concrete, provides a chute's concrete conveying capacity test device, can pass through this test device to the chute's concrete conveying capacity carries out simulation test to determine its conveying capacity.

[0005] In order to achieve the above technical purpose, the utility model provides a chute's concrete conveying capacity test device, the test device includes support chassis, chute and the chute support frame on support chassis, the chute support frame includes chute fixed frame, spacing frame and support rod, the spacing frame is vertically arranged on support chassis, one end of support rod is fixedly connected with support chassis, the other end is connected with the upper portion of spacing frame, and forms a triangular support frame with spacing frame, the spacing frame is equipped with gradient adjusting rod, one end of chute fixed frame is rotatably connected with the end of support chassis away from support rod, the other end extends obliquely upwards and is arranged on gradient adjusting rod, the chute is installed on chute fixed frame, at least two groups of chute hoop sleeve assemblies are fixedly installed on chute fixed frame, and the chute is fixed in chute hoop sleeve assembly through first bolt.

[0006] The utility model discloses a better technical scheme: the limiting frame includes two height adjusting rods that are arranged in parallel in the middle part of the length direction of the support base frame, a plurality of adjusting holes are equidistantly arranged on each height adjusting rod, the slope adjusting rod is provided with one or more, and is arranged between the two height adjusting rods, and the two ends of each slope adjusting rod are inserted into the corresponding adjusting holes.

[0007] The utility model discloses a better technical scheme: the chute hoop sleeve assembly is equipped with two groups, and the two groups of chute hoop sleeve assemblies are installed at the positions of the two ends of the corresponding chute respectively, each group of chute hoop sleeve assemblies includes the arc or U type hoop sleeve matched with the outer arc surface of the chute and the fixed ear plate fixedly welded on the outer wall of the two sides of the arc or U type hoop sleeve, the fixed ear plate is in the same section with the arc or U type hoop sleeve and is vertically installed on the chute fixing frame, and each fixed ear plate is fixed on the chute fixing frame through the second bolt, and the port of the arc or U type hoop sleeve is provided with the outwardly extending arc clamping groove.

[0008] The utility model discloses a better technical scheme: the chute fixing frame and support base frame connecting end are fixedly installed with the rotating support shaft, the lower end of the chute fixing frame is equipped with the rotating ear plate, the rotating ear plate is rotatably installed on the rotating support shaft and rotates along the rotating support shaft.

[0009] The utility model discloses a better technical scheme: the chute inner wall is marked with the scale line, the scale line scale increases gradually from the chute bottom end scale line to the chute top end, the limiting frame side wall is marked with the scale line, the scale line scale increases gradually from the top slope adjusting hole to the limiting frame bottom end, the support frame middle part clamping groove side wall is marked with the scale line, and the scale line scale increases gradually from the clamping groove top end to the support frame bottom end.

[0010] The utility model discloses a better technical scheme: the chute includes semicircular chute, U type chute and trapezoidal chute, and the material quality includes PVA, stainless steel or tinplate, the inner concave surface of the arc or U type hoop sleeve is attached to the surface of the chute outer wall, the chute inner wall is provided with the bayonet, and the edge is provided with the clamp, and the chute inner wall can lay the layered chute material of different material quality and different roughness through the clamp.

[0011] The utility model discloses a better technical scheme: the chute and support base frame are equal in length with the chute fixing frame, the support base frame adopts angle steel welding production, the chute fixing frame and limiting frame adopt the production of cuboid aluminum alloy welding, the limiting frame length is not less than the chute fixing frame length, and the support rod is made of steel bar.

[0012] The utility model discloses a better technical scheme: the chute length adopts 2-2.5m, and the chute slope adjusting range is 1:1-1:2.

[0013] The preferred technical solution of this utility model is as follows: the support base frame is provided with a slot corresponding to the position of each height adjustment rod, the bottom of each height adjustment rod is embedded in the slot, and it is fixed and locked by locking bolts.

[0014] The preferred technical solution of this utility model is as follows: There are two support rods, the upper ends of which are respectively connected to the top ends of two height adjustment rods. Each support rod has a strip bolt hole at its upper end. The upper end of the support rod is connected to the adjustment hole on the height adjustment rod through a third bolt. The lower ends of the two support rods are connected to the part of the support base away from the connection end of the chute fixing frame. A through hole is opened at the connection part of each support rod on the support base. The support rod is connected to the support base through a fourth bolt.

[0015] The chute of this invention can have a semi-circular, U-shaped, or trapezoidal cross-sectional shape. The internal roughness of the chute can be rough, relatively rough, or smooth. Multiple limiting rods can be installed on the limiting frame to prevent the chute fixing frame from falling and deforming. The slot and locking mechanism in the middle of the supporting base can be equipped with a knob for easy adjustment of the height of the limiting frame. Handrails can be installed on both sides of the middle of the chute fixing frame for easy adjustment of the slope of the chute fixing frame. Both the chute fixing frame and the supporting base are rectangular frames welded together from two long rods and multiple short rods. The inner wall of the chute is equipped with slots and the edges are equipped with clamps to accommodate different chute designs. The top of the chute is equipped with a small collection hopper and a baffle to ensure consistent concrete experimental conditions.

[0016] The beneficial effects of this utility model are:

[0017] This experimental device allows for adjustment of the chute slope based on on-site construction conditions to simulate the concrete conveying capacity of chutes with different slopes. Furthermore, by changing the length, cross-sectional shape and size, material, and layered chute material with varying roughness on the inner wall, it can simulate the concrete conveying capacity of chutes under different conditions. It is suitable for laboratory testing of concrete conveying performance through chutes. It achieves the purpose of laboratory chute performance testing by measuring the concrete conveying capacity of different chutes through tests of conveying time, slump loss, and concrete mass loss caused by chutes with different slopes, lengths, cross-sectional dimensions, and materials. This allows for the selection of the optimal chute for installation on construction sites and ensures that blockages or slow conveying occur in the chute during subsequent concrete transport, improving overall construction efficiency.

[0018] When using this invention, after installing the chute body, first adjust the height of the limiting frame to ensure the bolts are tightened. Insert the limiting rod into the slope adjustment hole of the corresponding slope, then attach the chute fixing frame to the limiting rod. Pour concrete into the top of the chute, record the concrete falling time, measure the concrete slump loss, and weigh the concrete mass loss. This experimental device can meet the testing requirements of concrete conveying capacity under different construction conditions. The device is simple to operate, has a wide range of applications, and is easy to store and assemble. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a front view schematic diagram of the present utility model;

[0021] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle;

[0022] Figure 4 for Figure 2 A magnified view of a portion of point B in the middle;

[0023] Figure 5 for Figure 2 A magnified view of a portion of point C in the middle;

[0024] Figure 6 for Figure 2 A magnified view of a portion of point D in the middle;

[0025] Figure 7 This is a schematic diagram of the overall structure of the chute clamp.

[0026] In the diagram: 1—Support base frame, 100—Rotating support shaft, 101—Slot, 102—Locking bolt, 103—Fourth bolt, 2—Channel fixing frame, 200—Rotating ear plate, 3—Limiting frame, 300—Height adjustment rod, 301—Slope adjustment rod, 302—Adjustment hole, 4—Support rod, 400—Strip bolt hole, 401—Third bolt, 5—Channel, 6—Channel clamp assembly, 600—Arc or U-shaped clamp, 601—Fixed ear plate, 602—Second bolt, 7—First bolt. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the following description is provided in conjunction with the appendix. Figures 1-7 The present invention will be further described in detail below with reference to specific embodiments. The specific embodiments described are merely some preferred embodiments of the present invention, and those skilled in the art can make modifications based on the present invention, which do not limit the present invention.

[0028] The embodiment provides a chute concrete conveying capacity test device, such as Figures 1 to 7As shown, including support chassis 1, chute 5 and placed on the support chassis 1, chute support frame, the support chassis 1 is made of two long 2.4m cuboid aluminum alloy with a plurality of welded at the bottom of the steel bar 40cm wide frame, is provided with a rotating shaft 100 at the left end, the chute support frame includes chute fixed frame 2, limit frame 3 and support rod 4; the limit frame 3 is vertically arranged on the support chassis 1, the limit frame 3 is provided with slope adjusting rod 301, the limit frame 3 includes two parallel height adjusting rod 300 arranged in the middle of the support chassis 1 length direction, a plurality of adjusting holes 302 are equidistantly arranged on each height adjusting rod 300, the slope adjusting rod 301 is provided with one or more, placed between the two height adjusting rod 300, the two ends of each slope adjusting rod 301 are inserted into the corresponding adjusting hole 302, the slope adjusting rod 301 has a groove on both sides and is provided with a clamp at both ends, the groove spacing is equal to the width of the limit frame 3, the slope of the chute fixed frame 2 is adjusted by adjusting the height of the slope adjusting rod 302 and making the chute fixed frame 2 lap on the slope adjusting rod 302. The support chassis 1 is provided with a clamping groove 101 corresponding to the position of each height adjusting rod 300, the bottom of each height adjusting rod 300 is embedded in the clamping groove 101, and is fixed and locked by the locking bolt 102. The clamping groove 101 is a hollow cuboid protruding vertically in the middle of the support chassis 1, the outer wall of the clamping groove 101 is provided with a scale line of 20cm from the bottom to the top, and the middle of the protruding part of the clamping groove 101 is provided with a locking screw 102 for adjusting the height of the height adjusting rod 300 in the direction of the support chassis 1. The locking screw 102 is composed of a screw rod and a nut, the outer side of the screw rod is provided with a thread, and the outer diameter of the rod is consistent with the hole diameter of the limiting hole at the lower end of the height adjusting rod 300. The locking screw is inserted into the limiting hole at the lower end of the height adjusting rod 300 by rotating the nut to realize the fastening of the limiting frame 3 and the preliminary adjustment of the height of the limiting frame 3. One end of the chute fixed frame 2 is rotatably connected with the left end of the support chassis 1, and a rotating shaft 100 is arranged at the left end of the support chassis 1. The rotating shaft 100 is used to support the rotation of the chute fixed frame 2. The left end of the chute fixed frame 2 is provided with a rotating ear plate 200, which is rotatably installed on the rotating shaft 100 and rotates along the rotating shaft 100. The right end of the chute fixed frame 2 extends upwardly and is arranged on the slope adjusting rod 301. The support rod 4 is provided with two, the upper ends of the two support rods 4 are respectively connected with the top ends of the two height adjusting rods 300, and a strip-shaped bolt hole 400 is formed in the upper end of each support rod 4. The upper end of the support rod 4 is connected with the adjusting hole 302 on the height adjusting rod 300 through a third bolt 401. The lower ends of the two support rods 4 are connected with the part of the support chassis 1 away from the connection end of the chute fixed frame 2, and a through hole is formed in the support chassis 1 corresponding to the connection part of each support rod 4. The support rod 4 and the support chassis 1 are connected through a fourth bolt 103. Each support rod 4 and a height adjusting rod 300 form a triangular support frame.

[0029] The embodiment provides a chute concrete conveying capacity test device, which comprises a chute fixed frame 2 and a chute 5. Figures 1 to 7 Figures 1 to 7 As shown in the figure, the chute 5 is installed on the chute fixed frame 2, the frame body of the chute fixed frame 2 is made of two 2.4m long angle steels and a plurality of 30cm long steel strips welded at the bottom, the chute fixed frame 2 is rotatably adjusted by a rotating shaft 100 and a rotating lug plate 200 to adjust the slope of the chute fixed frame 2, so as to change the slope of the chute 5, and the slope of the chute fixed frame 2 can be selected as 1:1, 1:1.45, 1:1.73 and 1:2. Two groups of chute hoop sleeve assemblies 6 are fixedly installed on the chute fixed frame 2, and the two groups of chute hoop sleeve assemblies 6 are respectively installed at positions corresponding to two ends of the chute 5; each group of chute hoop sleeve assemblies 6 comprises an arc-shaped or U-shaped hoop sleeve 600 matched with the outer arc surface of the chute 5 and a fixed lug plate 601 fixedly welded on the outer wall of the arc-shaped or U-shaped hoop sleeve 600, the fixed lug plate 601 is in the same section as the arc-shaped or U-shaped hoop sleeve 600 and is perpendicularly installed on the chute fixed frame 2, and each fixed lug plate 601 is fixed on the chute fixed frame 2 through a second bolt 602; the port of the arc-shaped or U-shaped hoop sleeve 600 is provided with an outwardly extending arc-shaped clamping groove. The chute 5 comprises a semicircular chute, a U-shaped chute and a trapezoidal chute, the length of the chute can be selected as 2.1m, 2.3m and 2.5m, the cross section of the semicircular chute is a semicircle with a radius of 30cm, the cross section of the trapezoidal chute is an isosceles trapezoid with a lower base of 30cm, an upper base of 50cm and a height of 30cm, and the cross section of the U-shaped chute is a semi-ellipse with a major axis of 30cm and a minor axis of 20cm at the lower part and a 10cm extension along the tangential direction of the ellipse at the upper part, the length of the chute fixed frame is 2.4m, the length of the chute support frame is 2.4m, and the height of the fixed frame is 2.1m. The chute 5 in the embodiment is a U-shaped PVA pipe with a length of 2.3m, the size of the chute 5 is 30cm*30cm, the chute 5 is fixed on the inner concave surface of the arc-shaped or U-shaped hoop sleeve 600 through the first bolt 7, the inner concave surface of the arc-shaped or U-shaped hoop sleeve 600 is matched with the outer wall surface of the chute 5, the sliding of the chute 5 is prevented, and the structural stability is increased. The inner wall of the chute 5 is provided with a bayonet and an edge provided with a clamp, and the inner wall of the chute 5 can lay layered chute materials with different materials and different roughness through the clamp.

[0030] In the embodiment, the inner wall of the chute 5 is marked with scale lines, the scale lines are marked from the bottom end of the chute 5 to the top end of the chute 5 in sequence, and the scale lines are increased in sequence, so that the sliding mode of the concrete through the chute is observed. The side wall of the limiting frame 3 is marked with scale lines, the scale lines are marked from the top slope adjusting hole to the bottom end of the limiting frame 3 in sequence, the scale lines are increased in sequence, the side wall of the middle clamping groove of the supporting frame 1 is marked with scale lines, and the scale lines are increased in sequence from the top end of the clamping groove to the bottom end of the supporting frame 1. The chute 5 and the supporting base frame 1 are equal in length to the chute fixing frame 2, the supporting base frame 1 is made of angle steel by welding, the chute fixing frame 2 and the limiting frame 3 are made of an aluminum alloy by welding, the length of the limiting frame 3 is not less than the length of the chute fixing frame 2, and the supporting rod 4 is made of a steel bar.

[0031] When the utility model is used for experiment, after the height of the limiting frame 3 required by the test slope is calculated in advance, the limiting frame 3 is fixed in the middle of the supporting base frame 1, the supporting base frame 1, the limiting frame 2 and the supporting rod 4 are assembled and fixed, the chute 5 and the chute hoop sleeve assembly 6 required in shape are selected, the chute fixing frame 2, the chute 5 and the supporting base frame 1 are assembled, the height of the slope adjusting rod 302 is adjusted and the chute fixing frame 2 is overlapped, the concrete required for the test is poured from the chute required in length under different slopes, the concrete falling state is observed, the concrete conveying time, the slump loss and the concrete quality loss are tested, the conclusion that whether the concrete of the variety meets the performance requirements under the specific engineering slope is obtained, and the optimization scheme is proposed from the aspects of the concrete mixing ratio, the chute slope, the inner surface roughness and the material quality. The chute top is matched with a small collecting hopper and a baffle, and the consistency of the concrete experimental conditions is ensured.

[0032] In the utility model, the terms such as "left end", "right end", "upper part", "lower part", "middle part", "bottom", "top", "length", "width" and the like are used for better describing the position relationship and the size of the component, and are only used for facilitating the description of the utility model, so the terms cannot be used as the absolute position relationship and the size as the limitation of the utility model.

Claims

1. A device for testing the concrete carrying capacity of a chute, characterised in that: The test device comprises a support chassis (1), a chute (5) and a chute support frame placed on the support chassis (1), the chute support frame comprises a chute fixing frame (2), a limiting frame (3) and a support rod (4), the limiting frame (3) is vertically arranged on the support chassis (1), one end of the support rod (4) is fixedly connected with the support chassis (1), the other end is connected with the upper part of the limiting frame (3) and forms a triangular support frame with the limiting frame (3), the limiting frame (3) is provided with a slope adjusting rod (301), one end of the chute fixing frame (2) is rotatably connected with the end of the support chassis (1) away from the support rod (4), the other end extends upwardly and is arranged on the slope adjusting rod (301), the chute (5) is installed on the chute fixing frame (2), at least two groups of chute hoop sleeve assemblies (6) are fixedly installed on the chute fixing frame (2), and the chute (5) is fixed in the chute hoop sleeve assembly (6) through a first bolt (7).

2. A chute concrete delivery capacity testing apparatus as defined in claim 1, wherein: The limiting frame (3) comprises two height adjusting rods (300) which are arranged in parallel at the middle part of the length direction of the support chassis (1), a plurality of adjusting holes (302) are equidistantly arranged on each height adjusting rod (300), and one or more slope adjusting rods (301) are arranged between the two height adjusting rods (300), and the two ends of each slope adjusting rod (301) are inserted into the corresponding adjusting holes (302).

3. A chute concrete delivery capacity testing apparatus according to claim 1 or 2, characterised in that: The chute hoop sleeve assembly (6) is provided with two groups, and the two groups of chute hoop sleeve assemblies (6) are respectively installed at the positions of the two ends of the corresponding chute (5); each group of chute hoop sleeve assemblies (6) comprises an arc-shaped or U-shaped hoop sleeve (600) matched with the outer arc surface of the chute (5) and fixed ear plates (601) fixedly welded on the outer walls of the two sides of the arc-shaped or U-shaped hoop sleeve (600), the fixed ear plates (601) are in the same section as the arc-shaped or U-shaped hoop sleeve (600) and are perpendicularly installed on the chute fixing frame (2), and each fixed ear plate (601) is fixed on the chute fixing frame (2) through a second bolt (602); and the port of the arc-shaped or U-shaped hoop sleeve (600) is provided with an outwardly-extended arc-shaped clamping groove.

4. The apparatus for testing the conveying capacity of a chute according to claim 1 or 2, wherein: The chute fixing frame (2) is fixedly installed with a rotating shaft (100) at the connecting end with the support chassis (1), the lower end of the chute fixing frame (2) is provided with a rotating ear plate (200), and the rotating ear plate (200) is rotatably installed on the rotating shaft (100) and rotates along the rotating shaft (100).

5. The apparatus for testing the conveying capacity of a chute according to claim 1 or 2, wherein: The inner wall of the chute (5) is marked with a scale line, the scale line scale increases from the bottom end scale line of the chute (5) to the top end of the chute (5), the side wall of the limiting frame (3) is marked with a scale line, the scale line scale increases from the top slope adjusting hole to the bottom end of the limiting frame (3), and the side wall of the middle clamping groove of the support frame (1) is marked with a scale line, and the scale line scale increases from the top end of the clamping groove to the bottom end of the support frame (1).

6. The apparatus for testing the conveying capacity of a chute according to claim 1 or 2, wherein: The chute (5) includes a semicircular chute, a U-shaped chute and a trapezoidal chute, and the materials include PVA, stainless steel or tinplate; the inner concave surface of the arc-shaped or U-shaped sleeve (600) is attached to the outer wall surface of the chute (5); the inner wall of the chute (5) is provided with a bayonet, and the edge is provided with a clamp, and the inner wall of the chute (5) can lay layered chute materials with different materials and different roughness through the clamp.

7. A chute concrete delivery capacity testing apparatus as claimed in claim 1 or 2, wherein: The chute (5) and the supporting chassis (1) are equal in length to the chute fixing frame (2), the supporting chassis (1) is made of angle steel welding, the chute fixing frame (2) and the limiting frame (3) are made of cuboid aluminum alloy welding, the length of the limiting frame (3) is not less than the length of the chute fixing frame (2), and the supporting rod (4) is made of steel bar.

8. The apparatus for testing the conveying capacity of a chute according to claim 1 or 2, wherein: The length of the chute is 2-2.5 m, and the slope adjustment range of the chute is 1:1-1:

2.

9. The chute concrete delivery capacity testing apparatus of claim 2, wherein: The supporting chassis (1) is provided with a clamping groove (101) corresponding to the position of each height adjusting rod (300), the bottom of each height adjusting rod (300) is embedded into the clamping groove (101), and is fixed and locked through a locking bolt (102).

10. The chute concrete delivery capacity testing apparatus of claim 2, wherein: The supporting rod (4) is provided with two, the upper ends of the two supporting rods (4) are respectively connected with the top ends of the two height adjusting rods (300), a strip-shaped bolt hole (400) is formed in the upper end of each supporting rod (4), the upper end of the supporting rod (4) is connected with the adjusting hole (302) on the height adjusting rod (300) through a third bolt (401); the lower ends of the two supporting rods (4) are connected with the part of the supporting chassis (1) away from the connecting end of the chute fixing frame (2), and a through hole is formed in the connecting part of the supporting chassis (1) corresponding to each supporting rod (4), and the supporting rod (4) and the supporting chassis (1) are connected through a fourth bolt (103).

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