Friction coefficient detection device for thixotropic slurry

Abstract

The utility model provides a friction coefficient detection device for thixotropic slurry, and relates to the technical field of pipe jacking engineering. The device comprises a moving device, the moving device comprises a pulley structure and a moving belt, the moving belt is arranged along the circumferential wall of a roller of the pulley structure to form a circulating moving system, a test sample structure and a standard test piece are arranged on the moving belt, the test sample structure is fixedly connected with the moving belt, and the standard test piece is arranged on the moving belt. The bottom of the standard test piece is in contact with the top of the test sample structure; the force measuring structure is connected with the standard test piece through a fixing device, when the pulley structure is moved, the moving belt and the test sample structure are driven to move, and friction is generated between the test sample structure and the standard test piece. According to the structure, the problems of inaccuracy and uncertainty of mud performance evaluation in engineering calculation and actual operation processes are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pipe jacking engineering technical field, specifically, relate to a kind of friction coefficient detection device of thixotropic mud. BACKGROUND

[0002] In the existing pipe jacking engineering technology, pipe jacking method construction technology usually injects thixotropic mud on the outer wall of pipeline, and currently, the method for evaluating mud friction coefficient in construction site is mainly to connect concrete test piece by spring dynamometer, and to measure the friction coefficient by dragging the test piece on the surface of thixotropic mud at constant speed. However, due to the influence of the adverse factors such as the weight of the dynamometer and the difficulty in keeping the dragging speed constant when using this method, the dispersion degree of the obtained mud friction coefficient data is large, which leads to the problems of inaccuracy and uncertainty of mud performance evaluation in engineering calculation and actual operation process.

[0003] Therefore, there is an urgent need for a friction coefficient detection device of thixotropic mud to solve the problems of inaccuracy and uncertainty of mud performance evaluation in engineering calculation and actual operation process. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of friction coefficient detection device of thixotropic mud to improve the above problems. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0005] A kind of friction coefficient detection device of thixotropic mud, comprising: the motion device includes pulley structure and mobile belt, the mobile belt is arranged along the roller peripheral wall of pulley structure and forms circulating movement system, test sample structure and standard test piece are provided on the mobile belt, the test sample structure is fixedly connected with the mobile belt, the bottom of the standard test piece is in contact with the top of the test sample structure;Force structure, the force structure is connected with the standard test piece by fixing device, when moving the pulley structure, drive the mobile belt and the test sample structure move, the test sample structure and the standard test piece generate friction.

[0006] Preferably, it further includes bubble type level, the bubble type level is arranged on the pulley structure along horizontal direction, and the bubble type level is fixedly connected with the bottom of the pulley structure.

[0007] Preferably, the pulley structure includes base, pulley frame and multiple pulleys, one end of the pulley frame is connected with the base, the other end of the pulley frame is connected with the wheel shaft of multiple pulleys through pulley connecting part, and multiple pulleys are arranged on the same horizontal shaft, and the mobile belt is arranged along the peripheral wall of multiple pulleys to form circulating movement system.

[0008] Preferably, the pulley structure comprises a handle fixedly connected with the wheel shaft of the pulley, and when the handle is rotated, the plurality of pulleys and the moving belt are driven to move.

[0009] Preferably, the base is vertically provided with the precision display plate, the precision display plate is provided with horizontal lines distributed at equal intervals, and the precision display plate is arranged in parallel with the standard test piece.

[0010] Preferably, the force measuring structure comprises a stand and a force gauge, one end of the stand is connected with the base, the force gauge is arranged on the middle end face of the stand, and the force gauge is connected with the standard test piece through a fixing device.

[0011] Preferably, the fixing device comprises a constraint ring and a fixing line, one end of the fixing line is connected with the constraint ring, the other end of the fixing line is connected with the force gauge, and the constraint ring is sleeved on the standard test piece.

[0012] Preferably, the fixing device comprises a first small pulley, a second small pulley and a third small pulley, the first small pulley and the second small pulley are arranged on the top of the stand, the second small pulley extends in the direction of the standard test piece, the third small pulley is arranged on the middle side wall of the stand, and the other end of the fixing line is sequentially wound around the third small pulley, the second small pulley and the first small pulley and connected with the force gauge.

[0013] Preferably, the test sample structure comprises a soil containing box and a soil body to be tested, the soil containing box is fixedly arranged on the moving belt, the soil body to be tested is arranged in the soil containing box, the soil body to be tested is provided with a touch-thick mud layer to be tested, and the touch-thick mud layer to be tested is in contact with the standard test piece.

[0014] Preferably, the standard test piece is provided with a weight.

[0015] The structure has the following beneficial effects:

[0016] The utility model discloses the introduction of the motion device, the fixing device and the force measuring structure, and the test sample structure is driven to move through the motion device, the standard test piece is fixed through the fixing device, when the test sample structure moves and the standard test piece produces friction, the test sample structure and the standard test piece are detected through the force measuring device, and the friction force size is obtained through the analysis of the detection result, in the detection process, the accuracy and reliability of the friction coefficient determination result are effectively guaranteed through the effective control of the speed and acceleration change of the test sample structure. The utility model effectively solves the inaccuracy and uncertainty of mud performance evaluation in the engineering calculation and actual operation process.

[0017] Other features and advantages of this invention will be set forth in the following description, and in part will be obvious from the description or may be learned by practicing the embodiments of this invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

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

[0020] Figure 2 Detailed structural diagram of this utility model;

[0021] Marked in the image:

[0022] 1. Motion device; 2. Test sample structure; 3. Standard specimen; 4. Force measuring structure; 5. Fixing device; 6. Bubble level; 7. Precision display panel; 8. Weights; 11. Pulley structure; 12. Moving belt; 21. Soil container; 22. Soil to be tested; 23. Thixotropic mud layer to be tested; 41. Column; 42. Force gauge; 51. Constraint ring; 52. Fixing line; 53. First small pulley; 54. Second small pulley; 55. Third small pulley; 111. Base; 112. Pulley frame; 113. Pulley; 114. Pulley connection; 115. Handle. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0024] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this utility model, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] like Figure 1 As shown, a friction coefficient testing device for thixotropic mud includes: a motion device 1, which includes a pulley structure 11 and a moving belt 12. The moving belt 12 is arranged along the circumferential wall of the rollers of the pulley structure 11 to form a cyclic moving system. A test sample structure 2 and a standard specimen 3 are disposed on the moving belt 12. The test sample structure 2 is fixedly connected to the moving belt 12, and the bottom of the standard specimen 3 contacts the top of the test sample structure 2. A force measuring structure 4 is connected to the standard specimen 3 through a fixing device 5. When the pulley structure 11 is moved, it drives the moving belt 12 and the test sample structure 2 to move, and the test sample structure 2 and the standard specimen 3 generate friction. The specific effects of this device are as follows: the standard specimen 3 is a standard concrete specimen, cast under the same conditions using concrete used in pipe jacking construction; the top of the test sample structure 2 is equipped with thixotropic mud to be tested; the force measuring structure 4 obtains the friction value generated between the test sample structure 2 and the standard specimen 3; the friction coefficient between the thixotropic mud and the concrete is calculated based on the friction value, the mass of the standard specimen 3, and the weight of the additional applied weights; in this device, the friction coefficient is detected by measuring the force only while the test sample structure 2 is in motion, with the standard concrete specimen stationary. Since the concrete specimen remains stationary, the force measurement result directly reflects the magnitude of the friction force. This process is independent of the speed and acceleration changes of the test sample structure 2, thus effectively ensuring the accuracy and reliability of the friction coefficient measurement results, and solving the problem in existing technologies that require uniformly pulling the concrete specimen and strictly maintaining uniform motion to obtain accurate friction force.

[0026] like Figure 2 As shown, it also includes a bubble level 6, which is horizontally mounted on the pulley structure 11 and fixedly connected to the bottom of the pulley structure 11. The bubble level 6 is used to monitor the lateral horizontal deviation between the motion device 1 and the working surface in real time.

[0027] To clarify the specific structure of the pulley structure 11, the pulley structure 11 includes a base 111, a pulley frame 112, and a plurality of pulleys 113. One end of the pulley frame 112 is connected to the base 111, and the other end of the pulley frame 112 is connected to the axle of the plurality of pulleys 113 through a pulley connecting part 114. The plurality of pulleys 113 are arranged on the same horizontal axis, and the moving belt 12 is arranged along the peripheral wall of the plurality of pulleys 113 to form a circulating moving system.

[0028] In the structure, the pulley structure 11 includes a handle 115, which is fixedly connected to the axle of the pulley 113. When the handle 115 is rotated, it drives the multiple pulleys 113 and the moving belt 12 to move. Slowly rotating the handle 115 counterclockwise moves the pulleys 113 and the moving belt 12 to the left to detect the friction value between the test sample structure 2 and the standard specimen 3. After the test is completed, rotating the handle 115 clockwise moves the pulleys 113 and the moving belt 12 to the right, and the pulleys 113 and the moving belt 12 return to their initial positions. The design of the handle 115 facilitates the operator's control of the experimental device, allowing for easy start or stop of the experimental process by manually operating the handle without the need for complex mechanics.

[0029] In this invention, a precision display panel 7 is vertically mounted on the base 111. The precision display panel 7 has equidistant horizontal lines and is parallel to the standard specimen 3. The fixing device 5 uses the horizontal lines of the precision display panel 7 as a reference to adjust its height.

[0030] To clarify the specific configuration of the force measuring structure 4, the force measuring structure 4 includes a column 41 and a force gauge 42. One end of the column 41 is connected to the base 111, and the force gauge 42 is disposed on the middle end face of the column 41. The force gauge 42 is connected to the standard specimen 3 through a fixing device 5. Preferably, the force gauge 42 is an electronic force gauge or a spring force gauge.

[0031] In this structure, the fixing device 5 includes a constraint ring 51 and a fixing line 52. One end of the fixing line 52 is connected to the constraint ring 51, and the other end of the fixing line 52 is connected to the force gauge 42. The constraint ring 51 is sleeved on the standard specimen 3. The constraint ring 51 fixes and constrains the standard specimen 3 and facilitates the force gauge 42 in measuring the force applied to the standard specimen 3.

[0032] To clarify the specific structure of the fixing device 5, the fixing device 5 includes a first small pulley 53, a second small pulley 54, and a third small pulley 55. The first small pulley 53 and the second small pulley 54 are both located at the top of the column 41. The second small pulley 54 extends along the direction of the standard specimen 3. The third small pulley 55 is located on the middle side wall of the column 41. The other end of the fixing line 52 passes sequentially around the third small pulley 55, the second small pulley 54, and the first small pulley 53 and connects to the force gauge 42. In this structure, the third small pulley 55, the second small pulley 54, and the first small pulley 53 are used to change the direction of the force, altering the direction of the force applied to the standard specimen 3, so that the force on the standard specimen 3 can be accurately measured by the force gauge 42.

[0033] The test sample structure 2 includes a soil container 21 and a soil sample 22 to be tested. The soil container 21 is fixedly mounted on the moving belt 12. The soil sample 22 is placed inside the soil container 21, and a thixotropic mud layer 23 to be tested is applied to the soil sample 22. The thixotropic mud layer 23 is in contact with the standard specimen 3. In this structure, the thixotropic mud layer 23 to be tested is uniformly coated on the upper surface of the soil sample 22. The soil container 21 is used to support the soil sample 22 to ensure that the soil sample 22 will not move or tip over during the experiment. The soil sample 22 is soil sampled from the testing site.

[0034] This structure also includes a weight 8, which is disposed on the standard specimen 3. The weight 8 applies pressure to the standard specimen 3, thereby ensuring close contact between the standard specimen 3 and the test sample structure 2, allowing for better observation of the interaction between the standard specimen 3 and the test sample structure 2 during the testing process.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0036] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A device for detecting the friction coefficient of thixotropic mud, characterized in that, include: The motion device (1) includes a pulley structure (11) and a moving belt (12). The moving belt (12) is arranged along the roller periphery of the pulley structure (11) to form a cyclic moving system. The moving belt (12) is provided with a test sample structure (2) and a standard specimen (3). The test sample structure (2) is fixedly connected to the moving belt (12). The bottom of the standard specimen (3) is in contact with the top of the test sample structure (2). The force measuring structure (4) is connected to the standard specimen (3) through a fixing device (5). When the pulley structure (11) is moved, the moving belt (12) and the test sample structure (2) are moved, and the test sample structure (2) rubs against the standard specimen (3).

2. The friction coefficient detection device for thixotropic mud according to claim 1, characterized in that, It also includes a bubble level (6), which is set horizontally on the pulley structure (11) and is fixedly connected to the bottom of the pulley structure (11).

3. The friction coefficient detection device for thixotropic mud according to claim 1, characterized in that, The pulley structure (11) includes a base (111), a pulley frame (112), and a plurality of pulleys (113). One end of the pulley frame (112) is connected to the base (111), and the other end of the pulley frame (112) is connected to the axle of the plurality of pulleys (113) through a pulley connecting part (114). The plurality of pulleys (113) are arranged on the same horizontal axis, and the moving belt (12) is arranged along the periphery of the plurality of pulleys (113) to form a circulating moving system.

4. The friction coefficient detection device for thixotropic mud according to claim 3, characterized in that, The pulley structure (11) includes a handle (115), which is fixedly connected to the axle of the pulley (113). When the handle (115) is rotated, it drives the multiple pulleys (113) and the moving belt (12) to move.

5. The friction coefficient detection device for thixotropic mud according to claim 3, characterized in that, A precision display board (7) is vertically arranged on the base (111), and horizontal lines are equidistantly distributed on the precision display board (7). The precision display board (7) is arranged parallel to the standard specimen (3).

6. The friction coefficient detection device for thixotropic mud according to claim 3, characterized in that, The force measuring structure (4) includes a column (41) and a force gauge (42). One end of the column (41) is connected to the base (111). The force gauge (42) is set on the middle end face of the column (41). The force gauge (42) is connected to the standard specimen (3) through a fixing device (5).

7. The friction coefficient detection device for thixotropic mud according to claim 6, characterized in that, The fixing device (5) includes a constraint ring (51) and a fixing line (52). One end of the fixing line (52) is connected to the constraint ring (51), and the other end of the fixing line (52) is connected to the force gauge (42). The constraint ring (51) is sleeved on the standard specimen (3).

8. The friction coefficient detection device for thixotropic mud according to claim 7, characterized in that, The fixing device (5) includes a first small pulley (53), a second small pulley (54) and a third small pulley (55). The first small pulley (53) and the second small pulley (54) are both located on the top of the column (41). The second small pulley (54) extends along the direction of the standard specimen (3). The third small pulley (55) is located on the middle side wall of the column (41). The other end of the fixing line (52) passes through the third small pulley (55), the second small pulley (54) and the first small pulley (53) in sequence and is connected to the force gauge (42).

9. The friction coefficient detection device for thixotropic mud according to claim 1, characterized in that, The test sample structure (2) includes a soil container (21) and a soil body to be tested (22). The soil container (21) is fixedly installed on the moving belt (12). The soil body to be tested (22) is installed inside the soil container (21). A thixotropic mud layer (23) to be tested is installed on the soil body to be tested (22). The thixotropic mud layer (23) to be tested is in contact with the standard specimen (3).

10. The friction coefficient detection device for thixotropic mud according to claim 1, characterized in that, It also includes weights (8), which are placed on the standard specimen (3).

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