Device for measuring friction coefficient of sandy soil and TRD cutter

Abstract

The utility model relates to the technical field of underground construction, and discloses a device for measuring the friction coefficient of sandy soil and a TRD cutter, which comprises a rack, a friction assembly, a power assembly and a tension sensor, the friction assembly comprises a box body, a bearing plate and a simulation cutter, the box body is arranged on the rack, the upper portion and the lower portion of the box body are open, the bearing plate is movably arranged on the rack in the left-right direction and penetrates through the bottom of the box body, and the simulation cutter is arranged on the bearing plate and located on the side, back to the rack, of the bearing plate. The power assembly comprises a motor, a take-up reel and a connecting rope, the motor is arranged on the rack, the take-up reel is arranged at the output end of the motor, one end of the connecting rope is arranged on the take-up reel, and the other end of the connecting rope is connected with the bearing plate; the tension sensor is arranged on the rack and used for detecting the tension borne by the connecting rope. According to the technical scheme, the accurate friction coefficient of the sandy soil can be obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of underground construction, in particular to a device for measuring the friction coefficient between sand and a TRD cutter. Background Art

[0002] In underground construction projects, the TRD method is a complete set of equipment and construction methods that can continuously build walls in various soil layers and gravel layers. During the trenching process of the TRD method, the soil layer will cause resistance to the movement of the TRD cutter, especially when encountering complex strata such as deep gravel. At this time, due to the excessive friction coefficient between the soil layer and the TRD cutter, the TRD cutter may be damaged during movement, affecting the construction process.

[0003] In related technologies, in order to take effective measures when encountering complex strata such as sand and gravel during construction, the friction coefficient of sand is measured by the inclined plane method. The friction coefficient is determined by placing the sand on an inclined plane and measuring its sliding speed at different angles. However, the results obtained by this method have large errors and can only obtain a large range of friction coefficients. Utility Model Content

[0004] The main purpose of the utility model is to provide a device for measuring the friction coefficient between sand and a TRD cutter, so as to obtain a relatively accurate friction coefficient of the sand.

[0005] To achieve the above purpose, the device for measuring the friction coefficient between sand and TRD tool proposed in the utility model comprises:

[0006] frame;

[0007] A friction assembly, the friction assembly comprising a box, a carrying plate and a simulated tool, the box being arranged on the frame, the box being opened at the top and the bottom, the carrying plate being movably arranged on the frame in the left and right directions, the carrying plate being passed through the bottom of the box, the simulated tool being arranged on the carrying plate and being located on a side of the carrying plate facing away from the frame;

[0008] A power assembly, the power assembly comprising a motor, a take-up drum and a connecting rope, the motor is arranged on the frame, the take-up drum is arranged on the output end of the motor, one end of the connecting rope is arranged on the take-up drum, and the other end of the connecting rope is connected to the carrying plate; and

[0009] A tension sensor is arranged on the frame, and is used to detect the tension applied to the connecting rope.

[0010] Optionally, the simulated tool includes a connecting portion and a simulation portion, the connecting portion is inserted into the supporting plate, and the simulation portion is exposed from the supporting plate.

[0011] Optionally, a plurality of the simulated cutters are provided, and the plurality of simulated cutters are arranged at intervals along the movable direction of the supporting plate.

[0012] Optionally, the device for measuring the friction coefficient between sand and TRD tool also includes a slide rail and a roller, the slide rail is arranged on the frame, the roller is arranged on the side of the supporting plate facing away from the simulated tool, and the roller is movably arranged on the slide rail.

[0013] Optionally, the device for measuring the friction coefficient between sand and the TRD tool further comprises an elastic limit block, the elastic limit block is arranged on the frame, and the bearing plate can abut against the elastic limit block for limiting position.

[0014] Optionally, the box body is enclosed by a front side panel, a left side panel, a rear side panel and a right side panel in sequence, the bottom of the front side panel, the bottom of the left side panel, the bottom of the rear side panel and the bottom of the right side panel are all fixed to the frame, and the left side panel and the right side panel are both provided with an avoidance groove for avoiding the load-bearing plate;

[0015] The device for measuring the friction coefficient between sand and TRD cutter also includes a reinforcing plate, one end of which is connected to the frame, and the other end of which is connected to the top of the left side plate;

[0016] Wherein, the power assembly is located on a side of the left side plate away from the right side plate.

[0017] Optionally, the reinforcing plate includes a reinforcing section and a covering section, the reinforcing section is connected to the top of the left side plate, the covering section is rotatably connected to the reinforcing section, and the covering section can be rotated to cover or reveal the opening at the top of the box body.

[0018] Optionally, the device for measuring the friction coefficient between sand and the TRD tool further comprises a pressure sensor, wherein the pressure sensor is disposed on the bearing plate, and the pressure sensor is used to detect the pressure exerted on the bearing plate.

[0019] Optionally, the device for measuring the friction coefficient between sand and TRD tool also includes a display screen, which is exposed on the frame and is communicatively connected to the tension sensor and the pressure sensor.

[0020] Optionally, the device for measuring the friction coefficient between sand and TRD tool also includes a processor, the processor is arranged on the frame, the processor is electrically connected to the tension sensor and the pressure sensor, and the display screen is communicatively connected to the display screen.

[0021] In the technical solution of the utility model, a preset weight of sand is placed in the box and compacted appropriately. At this time, the sand will exert pressure on the bearing plate and wrap the simulated tool. Then, driven by the motor, the take-up reel exerts pressure on the connecting rope, driving the bearing plate to perform horizontal uniform linear motion. At this time, the tension on the connecting rope is detected by the tension sensor, and the pressure on the bearing plate is obtained according to the preset weight of the sand, thereby obtaining a more accurate friction coefficient of the sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of an embodiment of a device for measuring the friction coefficient between sand and a TRD tool provided by the utility model.

[0024] Description of Figure Numbers:

[0025] Label name Label name 1 frame 902 Right side panel 2 Loading plate 10 Simulated tool 201 Event Space 101 Connection 3 Motor 11 Slide rails 4 Take-up reel 12 Scroll Wheel 5 Connection rope 13 Reinforcement plate 6 Elastic limit block 131 Shaft 7 Tension sensor 14 processor 8 Pressure Sensors 15 Display 901 Left side panel

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0030] Please refer to Figure 1 The utility model proposes a device for measuring the friction coefficient between sand and TRD tool, including a frame 1, a friction component, a power component and a tension sensor 7; the friction component includes a box body, a bearing plate 2 and a simulated tool 10, the box body is arranged on the frame 1, the box body has upper and lower openings, the bearing plate 2 is movably arranged on the frame 1 along the left and right directions, the bearing plate 2 is penetrated through the bottom of the box body, the simulated tool 10 is arranged on the bearing plate 2, and is located on the side of the bearing plate 2 facing away from the frame 1; the power component includes a motor 3, a take-up drum 4 and a connecting rope 5, the motor 3 is arranged on the frame 1, the take-up drum 4 is arranged at the output end of the motor 3, one end of the connecting rope 5 is arranged on the take-up drum 4, and the other end of the connecting rope 5 is connected to the bearing plate 2; the tension sensor 7 is arranged on the frame 1, and the tension sensor 7 is used to detect the tension exerted on the connecting rope 5.

[0031] In this embodiment, by putting a preset weight of sand into the box and compacting it appropriately, the sand will exert pressure on the supporting plate 2 and wrap the simulated tool 10. Then, driven by the motor 3, the take-up reel 4 exerts pressure on the connecting rope 5, driving the supporting plate 2 to make horizontal uniform linear motion. At this time, the tension sensor 7 detects the tension on the connecting rope 5, and the pressure on the supporting plate 2 is obtained according to the preset weight of the sand, thereby obtaining a more accurate friction coefficient of the sand.

[0032] Specifically, in one embodiment of the present invention, please refer to Figure 1 The simulation tool 10 includes a connecting portion 101 and a simulation portion, wherein the connecting portion 101 is inserted into the carrier plate 2 and the simulation portion is exposed from the carrier plate 2, wherein the specific structure of the simulation portion can be designed according to the TRD tool to be simulated to meet different measurement requirements.

[0033] In order to ensure the authenticity of the simulation, in one embodiment of the present utility model, please refer to Figure 1There are multiple simulated cutters 10, and the multiple simulated cutters 10 are arranged at intervals along the moving direction of the carrier plate 2. The specific number of simulated cutters 10 can be selected according to the TRD cutter to be simulated, and it can be kept consistent with the situation of the construction process as much as possible. In addition, the layout of the multiple simulated cutters 10 can also be distributed in a matrix or irregularly to meet different measurement requirements.

[0034] Further, in one embodiment of the present invention, please refer to Figure 1 The box body and the frame 1 are enclosed to form an activity space 201, one end of the supporting plate 2 facing the take-up drum 4 passes through the bottom of the box body and is exposed in the activity space 201, and most of the structure of the connecting rope 5 is in the activity space 201, so that when the motor 3 pulls the supporting plate 2 to move horizontally through the connecting rope 5, the connecting rope 5 is only connected to the take-up drum 4 and the supporting plate 2, and does not contact other objects, thereby avoiding the connecting rope 5 from being worn by other objects, extending the service life of the connecting rope 5, and improving the accuracy of measurement.

[0035] In order to further improve the accuracy of the measurement, in one embodiment of the present invention, please refer to Figure 1 The device for measuring the friction coefficient between sand and TRD tool also includes a slide rail 11 and a roller 12. The slide rail 11 is arranged on the frame 1, and the roller 12 is arranged on the side of the carrier plate 2 facing away from the simulated tool 10. The roller 12 is movably arranged on the slide rail 11. Through the cooperation of the slide rail 11 and the roller 12, when the carrier plate 2 moves horizontally, the friction between the carrier plate 2 and the frame 1 can be minimized to reduce the influence of the friction between the carrier plate 2 and the frame 1 on the measurement result, and further improve the accuracy of the measurement.

[0036] Further, in one embodiment of the present invention, please refer to Figure 1 The device for measuring the friction coefficient between sand and TRD tool also includes an elastic limit block 6, which is arranged on the frame 1, and the bearing plate 2 can be abutted against the elastic limit block 6 for limiting position. By setting the elastic limit block 6, when the bearing plate 2 moves horizontally to the extreme position, it will not directly contact the frame 1, but is used to contact the elastic limit block 6, thereby protecting the bearing plate 2 and the frame 1 and extending the service life of the device.

[0037] Specifically, in one embodiment of the present invention, please refer to Figure 1The box body is enclosed by a front side plate (not shown in the figure), a left side plate 901, a rear side plate (not shown in the figure) and a right side plate 902 in sequence. The bottom of the front side plate, the bottom of the left side plate 901, the bottom of the rear side plate and the bottom of the right side plate 902 are all fixed to the frame 1, and the left side plate 901 and the right side plate 902 are both provided with avoidance grooves for avoiding the bearing plate 2; the device for measuring the friction coefficient between sand and TRD tool also includes a reinforcing plate 13, one end of the reinforcing plate 13 is connected to the frame 1, and the other end of the reinforcing plate 13 is connected to the top of the left side plate 901. The reason for this arrangement is that the power assembly is located on the side of the left plate 901 away from the right plate 902, that is, when the motor 3 drives the supporting plate 2 to move horizontally through the connecting rope 5, the movement direction is from right to left, and due to the friction between the supporting plate 2 and the sand in the box body, the sand also tends to move to the left, that is, the sand will exert a certain force on the left plate 901. In this case, by setting the reinforcing plate 13, the connection strength between the left plate 901 and the frame 1 can be guaranteed, thereby ensuring that the measurement can be carried out normally.

[0038] Further, in one embodiment of the present invention, please refer to Figure 1 The reinforcing plate 13 includes a reinforcing section and a covering section. The reinforcing section is connected to the top of the left side plate 901. The covering section and the reinforcing section are rotatably connected via a rotating shaft 131. The opening above the box body can be exposed by rotating the covering section, so that sand can be put into the box body. Then, the opening above the box body can be covered by rotating the covering section, thereby preventing external sand or other objects from falling into the box body during the process of pulling the carrying plate 2 to move, thereby affecting the measurement results and ensuring the accuracy of the measurement.

[0039] In order to obtain the measurement results conveniently, in one embodiment of the present invention, please refer to Figure 1 The device for measuring the friction coefficient between sand and TRD tool also includes a pressure sensor 8. The pressure sensor 8 is arranged on the supporting plate 2. The specific size of the pressure on the supporting plate 2 is obtained through the pressure sensor 8. In this way, there is no need to weigh the sand before putting it in, which simplifies the measurement steps. At the same time, the value of the pressure on the supporting plate 2 is more accurate, that is, the friction coefficient finally measured is more accurate.

[0040] Further, in one embodiment of the present invention, please refer to Figure 1 The device for measuring the friction coefficient between sand and TRD tool also includes a display screen 15. The display screen 15 is exposed on the frame 1. The display screen 15 is communicatively connected with the tension sensor 7 and the pressure sensor 8. The values ​​measured by the tension sensor 7 and the values ​​measured by the pressure sensor 8 can be directly displayed on the display screen 15. By setting the display screen 15, the measurement data can be seen intuitively.

[0041] Furthermore, in one embodiment of the present invention, please refer to Figure 1 The device for measuring the friction coefficient between sand and TRD tool also includes a processor 14, which is arranged on the frame 1, and is electrically connected to the tension sensor 7 and the pressure sensor 8. The display screen 15 is communicatively connected to the display screen 15. The processor 14 can process the values ​​measured by the tension sensor 7 and the values ​​measured by the pressure sensor 8 to obtain the friction coefficient, and at the same time, all three values ​​are displayed on the display screen 15, so as to clearly and intuitively obtain the friction coefficient of the sand.

[0042] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A device for measuring the friction coefficient between sand and TRD cutter, It is characterized in that include: frame; A friction assembly, the friction assembly comprising a box, a carrying plate and a simulated tool, the box being arranged on the frame, the box being opened at the top and the bottom, the carrying plate being movably arranged on the frame in the left and right directions, the carrying plate being passed through the bottom of the box, the simulated tool being arranged on the carrying plate and being located on a side of the carrying plate facing away from the frame; A power assembly, the power assembly comprising a motor, a take-up drum and a connecting rope, the motor is arranged on the frame, the take-up drum is arranged on the output end of the motor, one end of the connecting rope is arranged on the take-up drum, and the other end of the connecting rope is connected to the carrying plate; as well as A tension sensor is arranged on the frame, and is used to detect the tension applied to the connecting rope.

2. The device for measuring the friction coefficient between sand and TRD tool as claimed in claim 1, It is characterized in that The simulated tool comprises a connecting portion and a simulation portion, wherein the connecting portion is inserted into the carrying plate, and the simulation portion is exposed from the carrying plate.

3. The device for measuring the friction coefficient between sand and TRD tool as claimed in claim 1, It is characterized in that There are a plurality of simulated cutters, and the plurality of simulated cutters are arranged at intervals along the moving direction of the carrying plate.

4. The device for measuring the friction coefficient between sand and TRD tool as claimed in claim 1, It is characterized in that The device for measuring the friction coefficient between sand and TRD tool also includes a slide rail and a roller. The slide rail is arranged on the frame, the roller is arranged on the side of the bearing plate facing away from the simulation tool, and the roller is movably arranged on the slide rail.

5. The device for measuring the friction coefficient between sand and TRD tool as claimed in claim 1, It is characterized in that The device for measuring the friction coefficient between sand and TRD tool also includes an elastic limit block, which is arranged on the frame, and the bearing plate can abut against the elastic limit block for limiting position.

6. The device for measuring the friction coefficient between sand and TRD tool as claimed in claim 1, It is characterized in that The box body is enclosed by a front side panel, a left side panel, a rear side panel and a right side panel in sequence, the bottom of the front side panel, the bottom of the left side panel, the bottom of the rear side panel and the bottom of the right side panel are all fixed to the frame, and the left side panel and the right side panel are both provided with an avoidance groove for avoiding the carrying plate; The device for measuring the friction coefficient between sand and TRD cutter also includes a reinforcing plate, one end of which is connected to the frame, and the other end of which is connected to the top of the left side plate; Wherein, the power assembly is located on a side of the left side plate away from the right side plate.

7. The device for measuring the friction coefficient between sand and TRD tool as claimed in claim 6, It is characterized in that The reinforcing plate comprises a reinforcing section and a covering section, wherein the reinforcing section is connected to the top of the left side plate, and the covering section is rotatably connected to the reinforcing section, and the covering section can be rotated to cover or reveal the opening at the top of the box body.

8. The device for measuring the friction coefficient between sand and TRD tool as claimed in claim 1, It is characterized in that The device for measuring the friction coefficient between sand and TRD tool also includes a pressure sensor, which is arranged on the bearing plate and is used to detect the pressure on the bearing plate.

9. The device for measuring the friction coefficient between sand and TRD tool as claimed in claim 8, It is characterized in that The device for measuring the friction coefficient between sand and TRD tool also includes a display screen, which is exposed on the frame and is communicatively connected with the tension sensor and the pressure sensor.

10. The device for measuring the friction coefficient between sand and TRD tool according to claim 9, It is characterized in that The device for measuring the friction coefficient between sand and TRD tool also includes a processor, which is arranged on the frame, the processor is electrically connected to the tension sensor and the pressure sensor, and the display screen is communicatively connected to the display screen.

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