CN219590175U - Sliding resistance testing device - Google Patents

Abstract

The utility model belongs to the technical field of concrete testing, and particularly relates to a sliding resistance testing device, which comprises: the device comprises a baffle plate assembly, a driving mechanism, a pressurizing mechanism and a pressure sensor, wherein a charging cavity for filling concrete is formed between the baffle plate assembly and the inner wall of the pipeline; the driving mechanism is used for driving the baffle plate assembly to slide in the pipeline in cooperation with the concrete; the pressurizing mechanism is positioned outside the pipeline and is used for applying pressure simulating a pumping working condition to the concrete in the charging cavity; the pressure sensor is arranged on the pipeline and used for measuring the acting force of the concrete on the inner wall of the pipeline. The whole friction resistance testing process comprises the following steps: firstly, concrete is filled into a charging cavity, then, the pressure simulating a pumping working condition is applied to the concrete in the charging cavity, then, a baffle plate assembly is driven to slide in a pipeline in cooperation with the concrete, and finally, the friction resistance of the concrete under the real pumping working condition is measured through multiple tests, so that the maximum conveying distance and the maximum conveying height of the concrete are calculated, and the problems of pump blockage, pipe blockage and the like are avoided.

Description

Sliding resistance testing device

Technical Field

The utility model belongs to the technical field of concrete testing, and particularly relates to a sliding resistance testing device.

Background

Since the advent of portland cement in 1824, concrete materials have been widely used in various industrial, residential and other construction industries. In practical engineering, the mixture has good pumping performance, which is a precondition for smoothly realizing pumping construction. Because of various factors such as raw material diversification, different operation levels of construction technicians, pipeline arrangement modes and the like, concrete pumping efficiency in actual engineering is different. Once the problems of pump blockage, pipe blockage and the like occur, the whole engineering is seriously affected. In order to know the maximum delivery distance and height of the concrete, it is necessary to know the resistance that the concrete is subjected to during the pipe delivery process.

The testing device in the prior art cannot simulate the pressure environment of the flowing of the real concrete in the pipeline, and the measured friction resistance is only the friction resistance between the concrete and the pipeline under normal pressure, and is not the friction resistance of the flowing of the real concrete in the pipeline, so that the maximum conveying distance and the maximum conveying height of the concrete under the real pumping working condition cannot be obtained.

Disclosure of Invention

The utility model mainly aims to provide a sliding resistance testing device, which aims to solve the technical problem that the friction resistance measured in the prior art is not the friction resistance under the actual pumping working condition.

In order to achieve the above object, the present utility model provides a sliding resistance testing apparatus for testing a sliding resistance of concrete in a pumping process in a pipe, wherein the sliding resistance testing apparatus comprises:

the baffle plate assembly is arranged in the pipeline, and a charging cavity for filling concrete is formed between the baffle plate assembly and the inner wall of the pipeline;

the driving mechanism is fixedly connected with the first end of the baffle assembly and is used for driving the baffle assembly to slide in the pipeline in cooperation with the concrete;

the pressurizing mechanism is positioned outside the pipeline and close to the second end of the baffle plate assembly, and is used for applying pressure simulating pumping working conditions to the concrete in the charging cavity; and

and the pressure sensor is arranged on the pipeline and is used for measuring the acting force of the concrete on the inner wall of the pipeline.

In an embodiment of the present utility model, a baffle assembly includes:

the front baffle is arranged close to one side of the pressurizing mechanism;

the rear baffle is arranged at intervals along the length direction of the pipeline and is connected with the driving mechanism, the outer peripheral walls of the front baffle and the rear baffle are in sealing contact fit with the inner side wall of the pipeline, and the front baffle, the rear baffle and the pipeline form a charging cavity;

the connecting rod is used for connecting the front baffle plate and the rear baffle plate along the length direction; and

and the fastener is matched with the connecting rod to fix the front baffle.

In an embodiment of the utility model, the connecting rod is a screw, and the fastener is in threaded engagement with the screw.

In an embodiment of the utility model, a sealing gasket is provided between the fastener and the front baffle.

In an embodiment of the utility model, the distance between the front and rear baffles is 50-100 mm.

In an embodiment of the utility model, the driving mechanism comprises a first linear driving piece and a speed measurer arranged on the first linear driving piece, wherein the driving end of the first linear driving piece is fixedly connected with the rear baffle, and the speed measurer is used for measuring the speed of the driving end of the first linear driving piece.

In an embodiment of the present utility model, the pressurizing mechanism includes:

a second linear driving member; and

and the pressurizing part is arranged at the driving end of the second linear driving part, the pressurizing part is provided with an avoidance hole for avoiding the connecting rod, and the second linear driving part is used for driving the pressurizing part to move towards the front baffle plate so as to apply acting force to the front baffle plate.

In an embodiment of the utility model, the sliding resistance testing device comprises a support assembly for supporting the pipe, the first linear drive and the second linear drive.

In an embodiment of the present utility model, a stand-off assembly includes:

a first support for supporting the second linear driving member;

the second support is used for supporting the pipeline, and the peripheral wall of the pipeline is pivotally connected with the top end of the second support; and

and the third support is used for supporting the first linear driving piece and is provided with a plurality of clamping parts used for fixing the end parts of the first linear driving piece at intervals along the height direction.

In an embodiment of the utility model, the support assembly further comprises a bottom plate, and the first support, the second support and the third support are arranged on the bottom plate at intervals.

Through the technical scheme, the sliding resistance testing device provided by the embodiment of the utility model has the following beneficial effects:

firstly, concrete is filled into a charging cavity formed by a baffle plate assembly and a pipeline, then a pressurizing mechanism is utilized to apply pressure simulating pumping working conditions to the concrete in the charging cavity, and at the moment, the reading of a pressure sensor is read; when the reading is that the acting force of the concrete on the inner wall of the pipeline reaches a preset value, the driving mechanism is started to drive the baffle plate assembly to slide in the pipeline in cooperation with the concrete, the sliding speed is recorded, and the friction resistance of the concrete under the real pumping working condition is finally measured through the pressure reading and the sliding speed after a plurality of tests, so that the maximum conveying distance and the maximum conveying height of the concrete are calculated, and the problems of pump blockage, pipe blockage and the like are avoided.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide an understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain, without limitation, the utility model. In the drawings:

FIG. 1 is a schematic view of a sliding resistance testing apparatus according to an embodiment of the present utility model;

description of the reference numerals

Reference numerals	Name of the name	Reference numerals	Name of the name
				1	Pipeline	5	Pressure sensor
21	Front baffle	6	Charging cavity
				22	Rear baffle	71	First support
23	Connecting rod	72	Second support
				24	Fastening piece	73	Third support
3	Driving mechanism	74	Bottom plate
				4	Pressurizing mechanism	75	Clamping part

Detailed Description

Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present utility model.

The sliding resistance testing apparatus according to the present utility model is described below with reference to the accompanying drawings.

As shown in fig. 1, in an embodiment of the present utility model, there is provided a sliding resistance testing apparatus for testing a real resistance of concrete during pumping in a pipe 1, wherein the sliding resistance testing apparatus includes: the device comprises a baffle plate assembly, a driving mechanism 3, a pressurizing mechanism 4 and a pressure sensor 5, wherein the baffle plate assembly is arranged in a pipeline 1, and a charging cavity 6 for charging concrete is formed between the baffle plate assembly and the inner wall of the pipeline 1; the driving mechanism 3 is fixedly connected with the first end of the baffle assembly and is used for driving the baffle assembly to slide in the pipeline 1 in cooperation with the concrete; the pressurizing mechanism 4 is positioned outside the pipeline 1 and is close to the second end of the baffle plate assembly, and the pressurizing mechanism 4 is used for applying pressure simulating pumping working conditions to the concrete in the charging cavity 6; the pressure sensor 5 is provided on the pipe 1 and is used for measuring the acting force of the concrete on the inner wall of the pipe 1.

Specifically, the entire sliding resistance test process is divided into four steps:

first, mounting a sliding resistance testing device: firstly, the baffle assembly is installed in the pipeline 1, the baffle assembly is pushed to the end position of the pipeline 1, then the driving mechanism 3 is connected with the baffle assembly, the pressure sensor 5 is arranged at the pipeline 1 corresponding to the position of the baffle assembly, and finally the pressurizing mechanism 4 is installed, so that the pressurizing mechanism 4 corresponds to the position and the height of the baffle assembly.

Secondly, testing no-load resistance: firstly, clean water is filled into a charging cavity 6, then the baffle plate assemblies are controlled by a driving mechanism 3 to reciprocate at different speeds, the no-load sliding resistance and the sliding speed in the whole process are measured and recorded, and finally the clean water is poured out.

Third, a test of the real resistance of the concrete during its pumping in the pipe 1 is carried out: firstly, concrete is filled into a charging cavity 6, then the pressure simulating pumping working conditions is applied to the concrete in the charging cavity 6 through a pressurizing mechanism 4, meanwhile, the pressure in a pipeline 1 is monitored through a pressure sensor 5, the pressurizing is stopped until the preset pressure is reached, then a baffle plate assembly is controlled to reciprocate at different speeds through a driving mechanism 3, the whole-course concrete sliding resistance and the whole-course concrete sliding speed are measured and recorded, and finally the concrete is discharged.

And fourthly, subtracting the idle sliding resistance from the sliding resistance of the concrete measured at the same sliding speed to obtain the actual resistance of the concrete at different sliding speeds and different pressures in the pumping process.

Due to the influence of various factors, such as diversification of raw materials and different operation levels of construction technicians, problems of pump blockage, pipe blockage and the like can occur in actual engineering, and in order to avoid the problems, the maximum conveying distance and the maximum conveying height of concrete need to be known. Under different construction working conditions, the pressure environments of concrete flowing in the pump pipe are different, and the real resistance of the concrete in the pumping process in the pump pipe can be measured through the sliding resistance testing device.

In the embodiment of the present utility model, the shutter assembly includes a front shutter 21, a rear shutter 22, a link 23, and a fastener 24, wherein the front shutter 21 is disposed near one side of the pressurizing mechanism 4; the rear baffle plate 22 and the front baffle plate 21 are arranged at intervals along the length direction of the pipeline 1, one side of the rear baffle plate 22, which is away from the front baffle plate 21, is connected with the driving mechanism 3, the peripheral walls of the front baffle plate 21 and the rear baffle plate 22 are in sealing contact fit with the inner side wall of the pipeline 1, and the front baffle plate 21, the rear baffle plate 22 and the pipeline 1 form a charging cavity 6; the link 23 is used to connect the front barrier 21 and the rear barrier 22 in the longitudinal direction, and the fastener 24 cooperates with the link 23 to fix the front barrier 21.

Specifically, the front baffle 21 is detachably connected with the connecting rod 23, and when loading is performed, the front baffle 21 is firstly detached, then concrete or clean water is filled into the pipeline 1, and finally the front baffle 21 is installed. The front baffle 21 and the rear baffle 22 are all abutted with the inner wall of the pipeline 1, so that the tightness of the charging cavity 6 is ensured, and concrete or clear water is prevented from flowing out of the charging cavity 6 to cause laboratory pollution. The straight steel pipeline 1 used for pumping construction is generally selected as the pipeline 1, the cross section of the pipeline 1 is circular, and the circular front baffle plate 21 and the circular rear baffle plate 22 are also selected to be matched with the pipeline 1. The inner diameter of the pipeline 1 is 90-100 mm, and the length is 1300-2000 mm, so that the sufficient test length is ensured, and the field can be saved.

Further, the connecting rod 23 is a screw rod, and the fastening piece 24 is in threaded fit with the screw rod. The screw is installed at the center of the rear barrier 22 and passes through the center of the front barrier 21. The pressurizing mechanism 4 pushes the front baffle 21 to slide along the screw to pressurize the concrete in the charging cavity 6, and when the pressure reaches a preset value, the pressurizing is stopped, and the front baffle 21 is locked by using the fastener 24 to complete the pressurizing. In order to ensure the sealing of the loading chamber 6, a sealing gasket is arranged between the fastener 24 and the front baffle plate 21 to prevent concrete or clean water in the loading chamber 6 from flowing out of the loading chamber 6 to pollute a laboratory.

In the embodiment of the utility model, the distance between the front baffle plate 21 and the rear baffle plate 22 is 50-100 mm, and the volume of the charging cavity 6 is ensured, so that the volume of concrete is ensured to be enough to complete the test, and the measured friction resistance is more real and reliable.

In the embodiment of the present utility model, the driving mechanism 3 includes a first linear driving member, the driving end of which is fixedly connected with the tailgate 22, and a speed measurer provided on the first linear driving member for measuring the speed of the driving end of the first linear driving member.

Specifically, the first linear driving member is preferably an oil cylinder, the oil cylinder is inserted from one end of the pipeline 1 and is fixedly connected with the rear baffle 22, meanwhile, the front baffle 21 and the rear baffle 22 are fixedly connected through a screw rod and a fastener 24, and the front baffle 21 and the rear baffle 22 are driven to slide in the pipeline 1 through a telescopic rod of the oil cylinder. The first linear drive may take other forms, such as a motor controlling movement of a drive structure such as a rotary screw, in other embodiments of the utility model.

In the embodiment of the present utility model, the pressurizing mechanism 4 includes a second linear driving member and a pressurizing portion, the pressurizing portion is mounted at the driving end of the second linear driving member, the pressurizing portion is provided with a dodging hole of the dodging link 23, and the second linear driving member is used for driving the pressurizing portion to move toward the front baffle 21 so as to apply a force to the front baffle 21.

Specifically, the second linear driving member is preferably an oil cylinder, the pressurizing part is arranged at the telescopic end of the oil cylinder, and the front baffle 21 is pushed to pressurize the concrete in the charging cavity 6 through the movement of the telescopic rod of the oil cylinder, and the pressurizing part does not interfere with the screw. The second linear drive member may take other forms in other embodiments of the utility model, such as a motor controlling movement of a drive structure such as a rotary screw.

In an embodiment of the present utility model, the sliding resistance testing apparatus includes a holder assembly including a first holder 71, a second holder 72, a third holder 73, and a bottom plate 74, wherein the first holder 71 is for supporting a second linear driving member; the second support 72 is used for supporting the pipeline 1, and the peripheral wall of the pipeline 1 is pivotally connected with the top end of the second support 72; and a third support 73 for supporting the first linear driving member, the third support 73 being provided with a plurality of catching portions 75 for fixing the end portions of the first linear driving member at intervals in the height direction. The first, second and third supports 71, 72 and 73 are spaced apart on the bottom plate 74. The base plate 74 serves to provide a mounting platform for all other mechanisms, with the first, second and third supports 71, 72, 73 maintaining the mechanisms on the same horizontal.

Specifically, the rotation of the pipe 1 is completed by the rotation of the second support 72, and when the fresh water or concrete is filled into the charging cavity 6, the mouth of the pipe 1 is rotated upwards; when the clear water or the concrete is poured out, the opening of the pipeline 1 is rotated downwards. Meanwhile, the pipeline 1 has larger mass, and the clamping part 75 arranged on the third support 73 is matched with the pipeline 1 to rotate for fixing the pipeline 1, so that the pipeline 1 keeps the state that the pipe orifice faces upwards or downwards, thereby being convenient to operate.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. A sliding resistance testing device for testing the sliding resistance of concrete during pumping in a pipeline, the sliding resistance testing device comprising:

the baffle plate assembly is arranged in the pipeline (1), and a charging cavity (6) for charging concrete is formed between the baffle plate assembly and the inner wall of the pipeline (1);

the driving mechanism (3) is fixedly connected with the first end of the baffle plate assembly, and the driving mechanism (3) is used for driving the baffle plate assembly to slide in the pipeline (1) in cooperation with concrete;

the pressurizing mechanism (4) is positioned outside the pipeline (1) and close to the second end of the baffle plate assembly, and the pressurizing mechanism (4) is used for applying pressure simulating a pumping working condition to the concrete in the charging cavity (6); and

and the pressure sensor (5) is arranged on the pipeline (1) and is used for measuring the acting force of the concrete on the inner wall of the pipeline (1).

2. The sliding resistance testing device of claim 1 wherein the baffle assembly comprises:

a front baffle (21) arranged near one side of the pressurizing mechanism (4);

the rear baffle plate (22) is arranged at intervals along the length direction of the pipeline (1), one side, deviating from the front baffle plate (21), of the rear baffle plate (22) is connected with the driving mechanism (3), the outer peripheral walls of the front baffle plate (21) and the rear baffle plate (22) are in sealing contact fit with the inner side wall of the pipeline (1), and the front baffle plate (21), the rear baffle plate (22) and the pipeline (1) form the charging cavity (6);

a link (23) for connecting the front barrier (21) and the rear barrier (22) in the longitudinal direction; and

and a fastener (24) which is matched with the connecting rod (23) to fix the front baffle (21).

3. The sliding resistance testing device according to claim 2, characterized in that the connecting rod (23) is a screw, and the fastener (24) is screw-fitted with the screw.

4. The sliding resistance testing device according to claim 2, characterized in that a sealing gasket is provided between the fastener (24) and the front baffle (21).

5. The sliding resistance testing device according to claim 2, characterized in that the distance between the front baffle (21) and the rear baffle (22) is 50-100 mm.

6. The sliding resistance testing device according to claim 2, characterized in that the driving mechanism (3) comprises a first linear driving member and a speed measurer arranged on the first linear driving member, the driving end of the first linear driving member is fixedly connected with the tailgate (22), and the speed measurer is used for measuring the speed of the driving end of the first linear driving member.

7. The sliding resistance testing apparatus according to claim 6, wherein the pressurizing mechanism (4) includes:

a second linear driving member; and

and the pressurizing part is arranged at the driving end of the second linear driving piece, the pressurizing part is provided with an avoidance hole for avoiding the connecting rod (23), and the second linear driving piece is used for driving the pressurizing part to move towards the front baffle plate (21) so as to apply acting force to the front baffle plate (21).

8. The sliding resistance testing apparatus according to claim 7, further comprising a stand assembly for supporting the pipe (1), the first linear drive and the second linear drive.

9. The sliding resistance testing device of claim 8 wherein the seat assembly comprises:

a first support (71) for supporting the second linear drive;

a second support (72) for supporting the pipe (1), the peripheral wall of the pipe (1) being pivotally connected to the top end of the second support (72); and

and the third support (73) is used for supporting the first linear driving piece, and a plurality of clamping parts (75) used for fixing the end part of the first linear driving piece are arranged on the third support (73) at intervals along the height direction.

10. The sliding resistance testing apparatus according to claim 9, wherein the holder assembly further comprises a bottom plate (74), and the first holder (71), the second holder (72), and the third holder (73) are provided on the bottom plate (74) at intervals.