Adhesion coefficient determinator and determination method thereof

Abstract

The invention discloses an adhesion coefficient determinator and a determination method thereof, and relates to the technical field of adhesion coefficient determination, the adhesion coefficient determinator comprises a frame body, a determination assembly, a support mechanism, a first buffer mechanism, a second buffer mechanism and a pressurization mechanism, the determination assembly is arranged in the frame body, and the determination assembly comprises an extrusion mechanism and a measurement mechanism; the supporting mechanism is arranged at the bottom end of the extruding mechanism, the first buffering mechanism is arranged at the bottom end of the supporting mechanism, the second buffering mechanism is arranged in the extruding mechanism, and the pressurizing mechanism is arranged above the second buffering mechanism. Through cooperation of the extrusion mechanism and the measuring mechanism, mud can be firstly in a mud cake state, then the extrusion mechanism reversely works to pull the mud cake so as to measure the adhesion coefficient, and therefore the convenience of adhesion coefficient measurement is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of adhesion coefficient measurement, and in particular to an adhesion coefficient measurement instrument and a measurement method thereof. Background Art

[0002] In the field of drilling engineering and geological exploration, the adhesion coefficient of mud is one of the important parameters for evaluating mud performance, which directly affects drilling efficiency and safety.

[0003] Traditional adhesion coefficient measurement methods usually use manual operation or simple mechanical devices, which have problems such as complex operation, low measurement accuracy, and poor repeatability. In addition, since the mud needs to undergo a transition from liquid to mud cake state during the measurement process, traditional equipment is prone to generate a large impact force when the mud cake separates during the measurement process, resulting in damage to the measuring instrument, which seriously affects the service life and stability of the measuring instrument. Therefore, we propose an adhesion coefficient measuring instrument and its measurement method. Summary of the invention

[0004] The object of the present invention is to provide an adhesion coefficient measuring instrument and a measuring method thereof to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: an adhesion coefficient measuring instrument, comprising:

[0006] Frame;

[0007] A measuring assembly, which is arranged inside the frame and includes a squeezing mechanism and a measuring mechanism;

[0008] A supporting mechanism, wherein the supporting mechanism is arranged at the bottom end of the extrusion mechanism;

[0009] A first buffer mechanism, wherein the first buffer mechanism is arranged at the bottom end of the supporting mechanism;

[0010] a second buffer mechanism, the second buffer mechanism being arranged inside the extrusion mechanism;

[0011] The pressurizing mechanism is arranged above the second buffer mechanism.

[0012] Preferably, the extrusion mechanism comprises:

[0013] A containing frame, wherein the containing frame is arranged inside the frame, the measuring mechanism is arranged at the bottom end of the frame, and a filtering mechanism is arranged inside the containing frame;

[0014] A hydraulic cylinder, wherein the hydraulic cylinder is mounted on the top of the inner wall of the frame;

[0015] The output end of the hydraulic cylinder is drivingly connected to the top end of the extrusion disk.

[0016] Preferably, the filtering mechanism comprises:

[0017] A fixed tube, the fixed tube is fixedly connected to the inner wall of the containing frame, and the inner wall of the fixed tube is provided with filter holes all over;

[0018] A drain pipe is fixedly inserted and connected to the top of the outer wall of the containing frame, and a sealing cover is threadedly sleeved on the outer wall of the drain pipe.

[0019] Preferably, the measuring mechanism comprises a dynamometer, which is mounted on the bottom end of the inner wall of the frame and connected to the bottom end of the containing frame.

[0020] Preferably, the supporting mechanism comprises:

[0021] A fixed column, the bottom end of which is fixedly connected to the inner wall of the frame;

[0022] A support rod, a movable hole is opened at the top of the fixed column, and the outer wall of the support rod is movably connected with the inner wall of the movable hole;

[0023] A support plate, the inner wall of the movable hole is provided with a limiting cavity, the outer wall of the support plate is slidably connected to the inner wall of the limiting cavity, the top end of the support plate is fixedly connected to the bottom end of the support rod, and the first buffer mechanism is arranged at the bottom end of the support plate.

[0024] Preferably, the first buffer mechanism comprises:

[0025] A first spring, wherein a slot is provided on the inner wall of the frame and below the support plate, and the first spring is disposed inside the slot;

[0026] A limiting ring is fixedly connected to the top of the inner wall of the slot, and the inner diameter of the limiting ring is smaller than the outer diameter of the support plate.

[0027] Preferably, the second buffer mechanism comprises:

[0028] A movable plate, wherein a movable groove is provided at the bottom end of the containing frame, and the outer wall of the movable plate is movably interlaced with the inner wall of the movable groove;

[0029] A limit plate, wherein the inner wall of the movable groove is provided with a movable cavity, the outer wall of the limit plate is slidably connected to the inner wall of the movable cavity, and the bottom end of the limit plate is fixedly connected to the top end of the movable plate;

[0030] A second spring, wherein the second spring is arranged at the top end of the limiting plate.

[0031] Preferably, the pressurizing mechanism comprises:

[0032] A piston plate, a connecting cavity is provided inside the containing frame, an outer wall of the piston plate is slidably connected to an inner wall of the connecting cavity, and a moving mechanism is provided on the back of the piston plate;

[0033] A first connecting hole, wherein the first connecting hole is opened between the connecting cavity and the movable cavity, a second connecting hole is opened on the front side of the containing frame, the interior of the second connecting hole is connected with the interior of the connecting cavity, the inner walls of the first connecting hole and the second connecting hole are symmetrically fixedly connected with fixing rings, a stopper is arranged between the two fixing rings, and a third spring is arranged between the stopper and one of the fixing rings.

[0034] Preferably, the moving mechanism comprises:

[0035] A gear rotatably connected to the inner wall of the connecting cavity;

[0036] A rack, the rack is fixedly connected to the inner wall of the frame, a slide groove is provided on the back of the containing frame, the rack is inserted into the inner wall of the slide groove, and the outer wall of the gear is meshed with the front of the slide groove;

[0037] A connecting rod, the connecting rod being arranged between the gear and the piston plate;

[0038] A first connecting shaft, wherein the first connecting shaft is fixedly connected to one side of the gear, a first rotating hole is formed at the end of the connecting rod, and an outer wall of the first connecting shaft is rotatably connected to an inner wall of the first rotating hole;

[0039] A second connecting shaft, the back side of the piston plate is symmetrically fixedly connected with a fixed block, the second connecting shaft is fixedly connected between the two fixed blocks, the other end of the connecting rod is provided with a second rotating hole, and the outer wall of the second connecting shaft is rotatably connected to the inner wall of the second rotating hole.

[0040] The present invention also provides a method for measuring an adhesion coefficient, comprising the following steps:

[0041] Step 1: Pour an appropriate amount of mud into the fixed pipe, and then the hydraulic cylinder works to drive the extrusion plate down until the extrusion plate is inserted into the fixed pipe to squeeze the mud, so that the liquid in the mud flows out through the filter hole, and unscrew the sealing cover to discharge the squeezed liquid through the drain pipe, until the mud is squeezed to the maximum extent and becomes a mud cake, and adheres between the extrusion plate and the inner wall of the containing frame. At this time, the hydraulic cylinder works to drive the extrusion plate to rise. Due to the adhesion of the mud cake, the containing frame rises with the extrusion plate, and the dynamometer will record the tension value as the containing frame rises;

[0042] Step 2: When the containing frame rises, the support plate drives the support rod to move upward under the elastic action of the first spring, and the limit plate drives the movable plate to move downward under the elastic action of the second spring, and the gear meshing with the rack rotates, and then the piston plate moves back and forth under the connection of the connecting rod, so that the external air enters the connecting cavity through the second connecting hole, and then enters the movable cavity through the first connecting hole, so that the position at the top of the limit plate in the movable cavity is in a positive pressure state;

[0043] Step 3: until the mud cake separates, the extrusion plate and the containing frame are no longer connected, and the dynamometer records the maximum tension value, which is used to obtain the adhesion coefficient. At this time, the containing frame will move downward rapidly, and then the impact force of the containing frame will be buffered by the first spring, the second spring and the positive pressure state in the active cavity.

[0044] Technical effects and advantages of the present invention:

[0045] (1) The present invention utilizes the cooperation of the extrusion mechanism and the measuring mechanism so that the mud can be firstly pressed into a mud cake state, and then the mud cake is pulled by the reverse operation of the extrusion mechanism to measure the adhesion coefficient, thereby improving the convenience of measuring the adhesion coefficient.

[0046] (2) The present invention utilizes the setting of the first buffer mechanism and the second buffer mechanism. When the containing frame moves upward, the support rod and the support plate will move upward under the elastic action of the first spring, and the limit plate and the movable plate will move downward under the elastic action of the second spring. This can ensure that when the mud cake is separated and the containing frame drops rapidly, the first spring and the second spring can buffer the impact force of the dropping of the containing frame, thereby avoiding damage to the dynamometer, improving the stability of the measuring instrument, and extending the service life of the measuring instrument.

[0047] (3) The present invention utilizes the setting of a pressurizing mechanism and a moving mechanism, so that when the containing frame moves upward, the gear meshing with the rack rotates, and then under the connection of the connecting rod, the piston plate moves back and forth, so that the external air enters the connecting chamber through the second connecting hole, and then enters the movable chamber through the first connecting hole, so that the position at the top of the limiting plate in the movable chamber is in a positive pressure state, so that when the mud cake is separated, the impact force can also be buffered by the positive pressure state, thereby improving the buffering effect of the second buffer mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0049] Figure 2 It is a schematic diagram of the side sectional structure of the present invention.

[0050] Figure 3 It is a front cross-sectional structural schematic diagram of the present invention.

[0051] Figure 4 It is a front cross-sectional structural schematic diagram of the support mechanism of the present invention.

[0052] Figure 5 It is a schematic diagram of the side sectional structure of the containing frame of the present invention.

[0053] Figure 6 For the present invention Figure 5 Schematic diagram of the local enlarged structure at point A.

[0054] In the figure: 101, frame; 201, containing frame; 202, hydraulic cylinder; 203, extrusion plate; 204, fixed pipe; 205, filter hole; 206, drain pipe; 207, sealing cover; 301, dynamometer; 401, fixed column; 402, movable hole; 403, support rod; 404, limit cavity; 405, support plate; 406, slot; 407, limit ring; 408, first spring; 501, movable slot; 50 2. movable plate; 503. movable cavity; 504. limit plate; 505. second spring; 601. connecting cavity; 602. first connecting hole; 603. second connecting hole; 604. piston plate; 605. fixing ring; 606. stopper; 607. third spring; 608. gear; 609. slide groove; 610. rack; 611. first connecting shaft; 612. connecting rod; 613. fixing block; 614. second connecting shaft. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] The present invention provides Figure 1-Figure 6 The adhesion coefficient measuring instrument shown includes a frame 101, a measuring component, a supporting mechanism, a first buffer mechanism, a second buffer mechanism and a pressurizing mechanism. The measuring component is arranged inside the frame 101. The measuring component includes an extrusion mechanism and a measuring mechanism. The supporting mechanism is arranged at the bottom end of the extrusion mechanism, the first buffer mechanism is arranged at the bottom end of the supporting mechanism, the second buffer mechanism is arranged inside the extrusion mechanism, and the pressurizing mechanism is arranged above the second buffer mechanism. Through the cooperation of the extrusion mechanism and the measuring mechanism, the mud can be firstly pressed into a mud cake state, and then the mud cake is pulled by the reverse work of the extrusion mechanism to measure the adhesion coefficient, thereby improving the convenience of the adhesion coefficient measurement, and through the cooperation of the first buffer mechanism, the second buffer mechanism and the extrusion mechanism, the impact force generated when the mud cake is separated can be buffered, which provides stability in the use of the measuring instrument and extends the service life of the measuring instrument.

[0057] The extrusion mechanism includes a holding frame 201, a hydraulic cylinder 202 and an extrusion plate 203. The holding frame 201 is arranged inside the frame 101, the measuring mechanism is arranged at the bottom of the frame 101, a filtering mechanism is arranged inside the holding frame 201, the hydraulic cylinder 202 is installed at the top of the inner wall of the frame 101, the output end of the hydraulic cylinder 202 is connected to the top of the extrusion plate 203 by transmission, the filtering mechanism includes a fixed pipe 204 and a drain pipe 206, the fixed pipe 204 is fixedly connected to the inner wall of the holding frame 201, the inner wall of the fixed pipe 204 is covered with filter holes 205, and the drain pipe 206 is fixedly inserted and connected to the top of the outer wall of the containing frame 201, and the outer wall of the drain pipe 206 is threaded with a sealing cover 207. A proper amount of mud is poured into the fixed pipe 204, and then the hydraulic cylinder 202 works to drive the extrusion plate 203 to descend until the extrusion plate 203 is inserted into the fixed pipe 204 to squeeze the mud, so that the liquid in the mud flows out through the filter hole 205, and the sealing cover 207 is unscrewed to allow the squeezed liquid to be discharged through the drain pipe 206 until the mud is squeezed to the maximum extent to become a mud cake, and adhere to the extrusion plate 203 and the inner wall of the containing frame 201.

[0058] Among them, the measuring mechanism includes a dynamometer 301, which is installed at the bottom end of the inner wall of the frame 101. The dynamometer 301 is connected to the bottom end of the containing frame 201. The hydraulic cylinder 202 drives the extrusion plate 203 to rise. Due to the adhesion of the mud cake, the containing frame 201 rises together with the extrusion plate 203, and the dynamometer 301 will record the tension value as the containing frame 201 rises until the mud cake is separated. The dynamometer 301 records the maximum tension value, thereby determining the adhesion coefficient.

[0059] Among them, the supporting mechanism includes a fixed column 401, a supporting rod 403 and a supporting plate 405, the bottom end of the fixed column 401 is fixedly connected to the inner wall of the frame 101, and a movable hole 402 is opened at the top of the fixed column 401, the outer wall of the supporting rod 403 is movably connected with the inner wall of the movable hole 402, and a limiting cavity 404 is opened on the inner wall of the movable hole 402, the outer wall of the supporting plate 405 is slidably connected with the inner wall of the limiting cavity 404, and the top of the supporting plate 405 is fixedly connected to the bottom end of the supporting rod 403, and the first buffer mechanism is arranged at the bottom end of the supporting plate 405, and the containing frame 201 is supported by the supporting plate 405 and the supporting rod 403, so that in the process of the squeezing mechanism pressing the mud cake, the lowest position of the containing frame 201 is limited, and when the containing frame 201 is at the lowest position, the dynamometer 301 is in a balanced state, thereby avoiding the squeezing mechanism from causing damage to the dynamometer 301, thereby improving the stability of the use of the measuring instrument and extending the service life of the measuring instrument.

[0060] Among them, the first buffer mechanism includes a first spring 408 and a limiting ring 407. A slot 406 is provided on the inner wall of the frame 101 and below the support plate 405. The first spring 408 is arranged inside the slot 406. The limiting ring 407 is fixedly connected to the top of the inner wall of the slot 406. The inner diameter of the limiting ring 407 is smaller than the outer diameter of the support plate 405. When the containing frame 201 rises, under the elastic action of the first spring 408, the support plate 405 drives the support rod 403 to move upward, and through the limiting of the limiting ring 407, the support plate 405 cannot enter the inside of the slot 406, thereby improving the working stability of the support mechanism.

[0061] Among them, the second buffer mechanism includes a movable plate 502 and a limiting plate 504, a movable groove 501 is provided at the bottom end of the containing frame 201, the outer wall of the movable plate 502 is movably connected with the inner wall of the movable groove 501, a movable cavity 503 is provided on the inner wall of the movable groove 501, the outer wall of the limiting plate 504 is slidably connected with the inner wall of the movable cavity 503, the bottom end of the limiting plate 504 is fixedly connected with the top end of the movable plate 502, and a second spring 505 is arranged at the top end of the limiting plate 504. Under the elastic force of the second spring 505, the limiting plate 504 drives the movable plate 502 to move downward. At this time, the movable plate 502 protrudes from the bottom end of the containing frame 201, and through the limiting of the limiting plate 504, the movable plate 502 will not be separated from the movable groove 501, thereby improving the working stability of the second buffer mechanism.

[0062] The pressurizing mechanism includes a piston plate 604 and a first connecting hole 602. A connecting cavity 601 is provided inside the containing frame 201. The outer wall of the piston plate 604 is slidably connected to the inner wall of the connecting cavity 601. A moving mechanism is provided on the back of the piston plate 604. The first connecting hole 602 is provided between the connecting cavity 601 and the movable cavity 503. A second connecting hole 603 is provided on the front of the containing frame 201. The interior of the second connecting hole 603 is connected to the interior of the connecting cavity 601. The inner walls of the first connecting hole 602 and the second connecting hole 603 are symmetrically fixedly connected with fixing rings 605. A stopper 606 is provided between the two fixing rings 605. A third spring 607 is provided between the stopper 606 and one of the fixing rings 605. The stopper 60 6. The third spring 607 and the two fixing rings 605 act as one-way valves in the first connecting hole 602 and the second connecting hole 603 respectively, that is, air circulation can only be from the second connecting hole 603 to the connecting cavity 601, and from the connecting cavity 601 to the first connecting hole 602, so that the reciprocating movement of the piston plate 604 can stably squeeze the active cavity 503, so that the active cavity 503 is in a positive pressure state, so that the second buffer mechanism can have double buffering through the positive pressure state and the cooperation of the second spring 505, thereby improving the buffering effect of the second buffer mechanism, and a connecting pipe is also opened on the inner wall of the active cavity 503, and a pressure relief valve is installed in the connecting pipe. When a measurement is completed, the pressure in the active cavity 503 is relieved through the pressure relief valve.

[0063] The moving mechanism includes a gear 608, a rack 610, a first connecting shaft 611, a connecting rod 612 and a second connecting shaft 614. The gear 608 is rotatably connected to the inner wall of the connecting cavity 601. The rack 610 is fixedly connected to the inner wall of the frame 101. A slide groove 609 is provided on the back of the containing frame 201. The rack 610 is inserted into the inner wall of the slide groove 609. The outer wall of the gear 608 is meshed with the front of the slide groove 609. The connecting rod 612 is provided between the gear 608 and the piston plate 604. The first connecting shaft 611 is fixedly connected to one side of the gear 608. A first rotating hole is provided at the end of the connecting rod 612, and the outer wall of the first connecting shaft 611 is rotatably connected to the inner wall of the first rotating hole. The back of the piston plate 604 is symmetrically fixedly connected with a fixed block 613, and the second connecting shaft 614 is fixedly connected between the two fixed blocks 613. A second rotating hole is provided at the other end of the connecting rod 612, and the outer wall of the second connecting shaft 614 is rotatably connected to the inner wall of the second rotating hole. When the containing frame 201 moves up, the gear 608 meshing with the rack 610 rotates, and then under the connection of the connecting rod 612, the piston plate 604 moves back and forth.

[0064] The present invention also provides a method for measuring an adhesion coefficient, comprising the following steps:

[0065] Step 1: Pour a proper amount of mud into the fixed pipe 204, and then the hydraulic cylinder 202 works to drive the squeezing plate 203 to descend, until the squeezing plate 203 is inserted into the fixed pipe 204 to squeeze the mud, so that the liquid in the mud flows out through the filter hole 205, and unscrew the sealing cover 207, so that the squeezed liquid is discharged through the drain pipe 206, until the mud is squeezed to the maximum extent and becomes a mud cake, and adheres between the squeezing plate 203 and the inner wall of the containing frame 201. At this time, the hydraulic cylinder 202 works to drive the squeezing plate 203 to rise. Due to the adhesion of the mud cake, the containing frame 201 rises together with the squeezing plate 203, and the dynamometer 301 will record the tension value as the containing frame 201 rises;

[0066] Step 2: When the containing frame 201 rises, the support plate 405 drives the support rod 403 to move upward under the elastic action of the first spring 408, and the limit plate 504 drives the movable plate 502 to move downward under the elastic action of the second spring 505, and the gear 608 meshing with the rack 610 rotates, and then the piston plate 604 reciprocates under the connection of the connecting rod 612, so that the external air enters the connecting chamber 601 through the second connecting hole 603, and then enters the movable chamber 503 through the first connecting hole 602, so that the position at the top of the limit plate 504 in the movable chamber 503 is in a positive pressure state;

[0067] Step 3: until the mud cake separates, the extrusion plate 203 is no longer connected to the containing frame 201, and the dynamometer 301 records the maximum tension value for obtaining the adhesion coefficient. At this time, the containing frame 201 will move downward rapidly, and then the impact force of the containing frame 201 will be buffered by the first spring 408, the second spring 505 and the positive pressure state in the active cavity 503.

[0068] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adhesion coefficient measuring instrument, characterized in that: include: A frame (101); A measuring component, the measuring component is arranged inside the frame (101), and the measuring component comprises a squeezing mechanism and a measuring mechanism; A supporting mechanism, wherein the supporting mechanism is arranged at the bottom end of the extrusion mechanism; A first buffer mechanism, wherein the first buffer mechanism is arranged at the bottom end of the supporting mechanism; a second buffer mechanism, the second buffer mechanism being arranged inside the extrusion mechanism; The pressurizing mechanism is arranged above the second buffer mechanism.

2. The adhesion coefficient measuring instrument according to claim 1, characterized in that: The extrusion mechanism comprises: A containing frame (201), the containing frame (201) being arranged inside the frame (101), the measuring mechanism being arranged at the bottom end of the frame (101), and a filtering mechanism being arranged inside the containing frame (201); A hydraulic cylinder (202), wherein the hydraulic cylinder (202) is installed on the top of the inner wall of the frame (101); The extrusion plate (203) is connected to the top of the extrusion plate (203) by transmission. The output end of the hydraulic cylinder (202) is connected to the top of the extrusion plate (203).

3. The adhesion coefficient measuring instrument according to claim 2, characterized in that: The filtering mechanism comprises: A fixed tube (204), the fixed tube (204) being fixedly connected to the inner wall of the containing frame (201), the inner wall of the fixed tube (204) being provided with filter holes (205); A drainage pipe (206) is fixedly inserted and connected to the top of the outer wall of the containing frame (201), and a sealing cover (207) is threadedly sleeved on the outer wall of the drainage pipe (206).

4. The adhesion coefficient measuring instrument according to claim 2, characterized in that: The measuring mechanism comprises a tensile gauge (301), which is installed at the bottom end of the inner wall of the frame (101), and the tensile gauge (301) is connected to the bottom end of the containing frame (201).

5. The adhesion coefficient measuring instrument according to claim 1, characterized in that: The supporting mechanism comprises: A fixed column (401), the bottom end of which is fixedly connected to the inner wall of the frame (101); A support rod (403), a movable hole (402) is formed at the top of the fixed column (401), and the outer wall of the support rod (403) is movably connected with the inner wall of the movable hole (402); A support plate (405), the inner wall of the movable hole (402) is provided with a limiting cavity (404), the outer wall of the support plate (405) is slidably connected to the inner wall of the limiting cavity (404), the top end of the support plate (405) is fixedly connected to the bottom end of the support rod (403), and the first buffer mechanism is arranged at the bottom end of the support plate (405).

6. The adhesion coefficient measuring instrument according to claim 5, characterized in that: The first buffer mechanism comprises: A first spring (408), wherein a slot (406) is provided on the inner wall of the frame (101) and located below the support plate (405), and the first spring (408) is arranged inside the slot (406); A limiting ring (407), wherein the limiting ring (407) is fixedly connected to the top of the inner wall of the slot (406), and the inner diameter of the limiting ring (407) is smaller than the outer diameter of the support plate (405).

7. The adhesion coefficient measuring instrument according to claim 2, characterized in that: The second buffer mechanism comprises: A movable plate (502), a movable groove (501) is provided at the bottom end of the containing frame (201), and the outer wall of the movable plate (502) is movably connected with the inner wall of the movable groove (501); A limiting plate (504), wherein the inner wall of the movable groove (501) is provided with a movable cavity (503), the outer wall of the limiting plate (504) is slidably connected to the inner wall of the movable cavity (503), and the bottom end of the limiting plate (504) is fixedly connected to the top end of the movable plate (502); A second spring (505), wherein the second spring (505) is arranged at the top end of the limiting plate (504).

8. The adhesion coefficient measuring instrument according to claim 7, characterized in that: The pressurizing mechanism comprises: A piston plate (604), wherein a connecting cavity (601) is provided inside the containing frame (201), an outer wall of the piston plate (604) is slidably connected to an inner wall of the connecting cavity (601), and a moving mechanism is provided on the back of the piston plate (604); A first connecting hole (602), wherein the first connecting hole (602) is provided between the connecting cavity (601) and the movable cavity (503); a second connecting hole (603) is provided on the front of the containing frame (201); the interior of the second connecting hole (603) is connected to the interior of the connecting cavity (601); the inner walls of the first connecting hole (602) and the second connecting hole (603) are symmetrically fixedly connected with fixing rings (605); a stopper (606) is provided between the two fixing rings (605); and a third spring (607) is provided between the stopper (606) and one of the fixing rings (605).

9. The adhesion coefficient measuring instrument according to claim 8, characterized in that: The moving mechanism comprises: a gear (608), wherein the gear (608) is rotatably connected to the inner wall of the connecting cavity (601); A rack (610), the rack (610) is fixedly connected to the inner wall of the frame (101), a slide groove (609) is provided on the back of the containing frame (201), the rack (610) is inserted into the inner wall of the slide groove (609), and the outer wall of the gear (608) is meshedly connected with the front of the slide groove (609); A connecting rod (612), wherein the connecting rod (612) is disposed between the gear (608) and the piston plate (604); A first connecting shaft (611), wherein the first connecting shaft (611) is fixedly connected to one side of the gear (608), a first rotating hole is formed at the end of the connecting rod (612), and an outer wall of the first connecting shaft (611) is rotatably connected to an inner wall of the first rotating hole; A second connecting shaft (614), the back side of the piston plate (604) is symmetrically fixedly connected with a fixed block (613), the second connecting shaft (614) is fixedly connected between the two fixed blocks (613), the other end of the connecting rod (612) is provided with a second rotating hole, and the outer wall of the second connecting shaft (614) is rotatably connected to the inner wall of the second rotating hole.

10. A method for measuring adhesion coefficient according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Pour a proper amount of mud into the fixed pipe (204), and then the hydraulic cylinder (202) drives the squeezing plate (203) to descend until the squeezing plate (203) is inserted into the fixed pipe (204) to squeeze the mud, so that the liquid in the mud flows out through the filter hole (205), and the sealing cover (207) is unscrewed to make the squeezed liquid discharged through the drain pipe (206), until the mud is squeezed to the maximum extent and becomes a mud cake, and adheres between the squeezing plate (203) and the inner wall of the containing frame (201), at this time, the hydraulic cylinder (202) drives the squeezing plate (203) to rise, and due to the adhesion of the mud cake, the containing frame (201) rises together with the squeezing plate (203), and the tension meter (301) records the tension value as the containing frame (201) rises; Step 2: while the containing frame (201) is rising, under the elastic action of the first spring (408), the support plate (405) drives the support rod (403) to move upward, and under the elastic action of the second spring (505), the limit plate (504) drives the movable plate (502) to move downward, and the gear (608) meshing with the rack (610) rotates, and then under the connection of the connecting rod (612), the piston plate (604) moves back and forth, so that the external air enters the connecting chamber (601) through the second connecting hole (603), and then enters the movable chamber (503) through the first connecting hole (602), so that the position at the top of the limit plate (504) in the movable chamber (503) is in a positive pressure state; Step 3: until the mud cake separates, the extrusion plate (203) and the containing frame (201) are no longer connected, and the dynamometer (301) records the maximum tension value for obtaining the adhesion coefficient. At this time, the containing frame (201) will move downward rapidly, and then the impact force of the containing frame (201) is buffered by the first spring (408), the second spring (505) and the positive pressure state in the movable chamber (503).

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