Strength detection device for cement material

Abstract

The invention discloses a cement material strength detection device, and belongs to the technical field of material detection, the cement material strength detection device comprises an upper ring body, a plurality of channels are annularly arranged in the upper ring body at equal intervals, one end of each channel is communicated with an inner ring of the upper ring body, and one end, far away from the inner ring of the upper ring body, of each channel is communicated with a through hole; a channel is formed in the upper ring body, a clamping block is connected in the channel in a sliding mode, an inclined face is arranged at the end, away from the channel, of the clamping block, a containing groove is formed in the end, located on the inner ring of the upper ring body, of the clamping block, a first elastic piece is fixedly connected in the containing groove, and one end of the first elastic piece extends to the outer side of the containing groove; the lower side of the upper ring body is connected with a lower ring body through a second elastic piece, the upper side of the lower ring body is fixedly connected with an inclined block, the inclined block extends into the through hole and the channel, and the inclined face of the inclined block is attached to the inclined face of the clamping block in a sliding mode. The clamping device has the advantages that the clamping synchronism, the coaxiality guarantee, the operation convenience and the adaptability are optimized.

Description

Technical Field

[0001] The invention belongs to the technical field of material detection, and in particular relates to a strength detection device for cement materials. Background Art

[0002] In numerous fields, including construction, mining, and underground tunneling, anchor rods, a crucial anchoring component, are widely used to reinforce rock, soil, and various structures to enhance their stability and bearing capacity. Cement is often used as an anchoring agent, filling the gap between the anchor rod and the borehole wall, firmly anchoring the rod to the substrate. The quality of its anchoring performance is directly related to the safety and reliability of the entire engineering structure.

[0003] With the continuous development of engineering construction, the demand for accurate testing of the anchoring performance of cement materials is becoming increasingly urgent. Traditional anchor strength testing methods have many drawbacks and can no longer meet the current high-standard and high-efficiency engineering requirements. In the past, common testing methods mostly relied on manual methods using simple clamps to fix anchors for tensile testing. This method is not only cumbersome to operate and consumes a lot of manpower and time, but also because manual operation makes it difficult to ensure uniform clamping force each time, it is very easy to cause uneven force on the anchors. For example, in large-scale mining projects, when a large number of anchors need to be tested in batches, manual operation is inefficient and seriously slows down the progress of the project. The uneven force also causes large errors in the test results, which cannot accurately reflect the true anchoring strength of the cement material, making it difficult for engineering personnel to accurately judge the anchoring effect based on this, which in turn brings great trouble to subsequent construction decisions, and may result in excessive reinforcement and waste of resources, or leave safety hazards due to misjudgment of sufficient anchoring strength.

[0004] Furthermore, traditional clamps lack effective adaptive adjustment capabilities and have extremely poor compatibility with anchor rods of varying diameters. Even the slightest change in the diameter of the anchor rod prevents the clamp from fitting tightly and providing stable and sufficient clamping force, preventing smooth testing. This requires strict control of diameter accuracy during anchor rod processing, which undoubtedly increases production costs and processing difficulty. In actual projects, anchor rods come from a variety of sources, making it difficult to ensure that all anchor rods have exactly the same diameter. This greatly limits the application scenarios of traditional clamps and prevents them from flexibly adapting to the complex and ever-changing conditions of engineering sites.

[0005] In addition, although some existing detection devices have attempted to adopt automated clamping structures, their structures are complex and difficult to assemble and debug. Professional technicians are required to expend a lot of effort to calibrate various parameters. Not only are the equipment costs high, but once a failure occurs, maintenance is inconvenient and downtime is long, further affecting the progress of project inspections. It is not conducive to frequent and rapid batch inspection operations on the project site, and increases the overall project schedule and cost burden.

[0006] To sum up, the existing anchor strength testing technology has serious deficiencies in key aspects such as clamping synchronization, coaxiality assurance, ease of operation and adaptability. It is urgent to develop a new cement material strength testing device that can overcome the above-mentioned defects to meet the growing high-quality, high-efficiency and high-adaptability testing needs of modern engineering construction, ensure the safety and stability of various engineering structures, and promote the steady development of the engineering industry. Summary of the Invention

[0007] In response to the problems existing in the prior art, the present invention provides a strength detection device for cement materials, which has the advantages of optimizing clamping synchronization, coaxiality guarantee, operation convenience and adaptability, and solves the problems of the prior art.

[0008] The present invention is achieved as follows: a strength detection device for cement materials includes an upper ring body, a plurality of channels are equidistantly arranged in an annular shape inside the upper ring body, one end of the channel is connected to the inner ring of the upper ring body, and the end of the channel away from the inner ring of the upper ring body is connected to a through hole, a clamping block is slidably connected in the channel, and the end of the clamping block away from the channel is provided with an inclined surface, the clamping block is located at the end of the inner ring of the upper ring body and has a receiving groove, a first elastic member is fixedly connected to the receiving groove, and one end of the first elastic member extends to the outside of the receiving groove; the lower side of the upper ring body is connected to the lower ring body through the second elastic member, and the upper side of the lower ring body is fixedly connected to the inclined block, the inclined block extends to the through hole and the channel, and the inclined surface of the inclined block slides in contact with the inclined surface of the clamping block.

[0009] As a preferred embodiment of the present invention, the upper ring body and the lower ring body are both circular rings; the inner ring size of the lower ring body is larger than the inner ring size of the upper ring body.

[0010] As a preferred embodiment of the present invention, the first elastic member includes a spring, a U-shaped connecting seat and a pressure plate, one end of the spring is fixedly connected to the end of the accommodating groove, the other end of the spring is rotatably connected to the U-shaped connecting seat, and the pressure plate is rotatably connected to the U-shaped connecting seat via a rotating shaft.

[0011] As a preferred embodiment of the present invention, the pressing plate includes an upper sub-plate and a lower sub-plate, and the angle between the upper sub-plate and the lower sub-plate is 140°-170°.

[0012] As a preferred embodiment of the present invention, a receiving opening is provided on the upper sub-plate, and an elastic rubber wheel is provided in the receiving opening.

[0013] As a preferred embodiment of the present invention, an anti-slip strip is provided on the lower side of the front surface of the lower sub-plate, and the anti-slip strip is provided in several groups.

[0014] As a preferred embodiment of the present invention, the upper portion of the back surface of the lower sub-plate is connected to the clamping block via a third elastic member.

[0015] As a preferred embodiment of the present invention, a guide column is fixedly connected to the back of the U-shaped connecting seat;

[0016] The clamping block is provided with a guide groove, and the guide post is slidably inserted into the guide groove.

[0017] As a preferred embodiment of the present invention, the inner diameter of the lower ring body is greater than the inner diameter of the upper ring body.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. High clamping synchronization: Thanks to the multiple equidistant channels arranged in a circular pattern within the upper ring body and the uniformly sized clamping and bevel blocks, each clamping block is evenly stressed and moves synchronously under the push of the bevel block. This means that the anchor rod receives uniform clamping force from all four sides at the same instant, avoiding the impact of localized uneven force due to asynchronous clamping that affects the accuracy of the test results, and accurately simulating the actual anchor rod working condition of balanced force in all directions.

[0020] 2. Guaranteed coaxiality: The design of the inclined block extending into the through-hole and channel not only propels the clamp but also cleverly guides it. This ensures that the upper and lower rings remain coaxial during vertical movement and operation, preventing eccentricity or skew. Good coaxiality ensures that the clamp securely grips the anchor rod's axis, ensuring that the hydraulic cylinder's tension is perpendicular to the anchor rod, minimizing lateral force interference and providing reliable test data that accurately reflects the cement's anchoring performance.

[0021] 3. Convenient and Efficient Operation: The entire device has a straightforward operation process. Simply insert the hydraulic cylinder, upper ring, and lower ring in sequence. The device's mechanical structure automatically clamps the anchor bolt, eliminating the need for complex debugging or additional tools to calibrate the clamping block position. This significantly reduces test preparation time and improves efficiency when testing the anchor strength of large numbers of anchor bolts or batches of cement materials. It is particularly suitable for rapid, batch testing needs on construction sites.

[0022] 4. Strong adaptability: Through the buffering and adaptive adjustment of various elastic components, the device can adapt to anchor rods of different diameters within a certain range. When the anchor rod diameters vary slightly, the clamping block, assisted by the elastic components, can flexibly adjust the clamping stroke. The inclined block and the clamping block's inclined surface can still effectively apply force, reducing the stringent requirements for anchor rod machining precision, broadening the device's scope of application, and making it more versatile in different engineering scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 1 is a schematic structural diagram of a cement material strength detection device provided by an embodiment of the present invention;

[0024] Figure 2 The embodiment of the present invention provides Figure 1 Schematic diagram of the enlarged structure of part A;

[0025] Figure 3 This is a schematic diagram of the main structure of the cement material provided by an embodiment of the present invention;

[0026] Figure 4 The embodiment of the present invention provides Figure 3 Schematic diagram of the cross-sectional structure of the middle BB part;

[0027] Figure 5 The embodiment of the present invention provides Figure 4 Schematic diagram of the enlarged structure of part C.

[0028] In the picture:

[0029] 1. Upper ring body; 2. Channel; 3. Through hole; 4. Clamping block; 5. Inclined surface; 6. Accommodating groove; 7. First elastic member; 71. Spring; 72. U-shaped connecting seat; 73. Pressing plate; 8. Second elastic member; 9. Lower ring body; 10. Inclined block; 11. Accommodating opening; 12. Elastic rubber wheel; 13. Anti-slip strip; 14. Third elastic member; 15. Guide column; 16. Guide groove. DETAILED DESCRIPTION

[0030] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0031] The structure of the present invention is described in detail below with reference to the accompanying drawings.

[0032] like Figures 1 to 5 As shown, an embodiment of the present invention provides a strength detection device for cement materials, characterized in that it includes an upper ring body 1, a plurality of channels 2 are equidistantly arranged in an annular manner inside the upper ring body 1, one end of the channel 2 is connected to the inner ring of the upper ring body 1, and the end of the channel 2 away from the inner ring of the upper ring body 1 is connected to a through hole 3, a clamping block 4 is slidably connected to the channel 2, and the end of the clamping block 4 away from the channel 2 is provided with an inclined surface 5, and the clamping block 4 is located at one end of the inner ring of the upper ring body 1 and has a receiving groove 6, a first elastic member 7 is fixedly connected to the receiving groove 6, and one end of the first elastic member 7 extends to the outside of the receiving groove 6;

[0033] The lower side of the upper ring body 1 is connected to the lower ring body 9 through the second elastic member 8, and the upper side of the lower ring body 9 is fixedly connected to the inclined block 10, which extends into the through hole 3 and the channel 2, and the inclined surface of the inclined block 10 slides in contact with the inclined surface 5 of the clamping block 4.

[0034] When used, the following steps are included:

[0035] Initial Preparation and Installation: When testing the strength of an anchor bolt secured in cement, first place the hydraulic cylinder over the vertically fixed, partially exposed anchor bolt. Next, align the upper and lower ring bodies 1 and 9 of the testing device with the anchor bolt and insert them from top to bottom. Initially, the clamping block 4 is positioned relatively inward of the inner ring opening of the channel 2. The inclined surface 5 of the clamping block 4 does not fit tightly against the inclined block 10, leaving some space to allow the upper and lower ring bodies 1 and 9 to slide smoothly into the anchor bolt.

[0036] Anchor clamping process:

[0037] As the upper ring body 1 and the lower ring body 9 continue to move downward, the lower ring body 9 presses on the upper end of the hydraulic cylinder, the upper ring body 1 continues to descend, and the inclined block 10 fixed on the lower ring body 9 gradually enters the through hole 3 and the channel 2. Because the inclined surface of the inclined block 10 and the inclined surface 5 of the clamping block 4 are designed to fit each other, the upward pushing action of the inclined block 10 will generate a component of force on the clamping block 4 outward, that is, toward the anchor rod.

[0038] Under the action of this force component, the clamping block 4 overcomes the elastic force of the first elastic member 7 and slides along the channel 2 toward the anchor rod until the clamping block 4 tightly clamps the anchor rod. During this process, since multiple channels 2 are equidistantly distributed in an annular shape within the upper ring body 1, and the matching structure of the clamping block 4 and the inclined block 10 in each channel 2 is completely consistent, the multiple clamping blocks 4 can move synchronously, achieving uniform force application and clamping of the anchor rod.

[0039] Testing Implementation: When the clamping block 4 securely grips the anchor rod and the lower ring 9 presses against the top of the hydraulic cylinder, the cylinder begins to operate. The cylinder extends, and its top exerts an upward pull on the anchor rod, which is anchored in the cement material. As the pull gradually increases, the anchoring force between the anchor rod and the cement material resists the pull until the cement material reaches its limit of anchoring the anchor rod. By monitoring the force applied by the hydraulic cylinder and other parameters such as the displacement of the anchor rod, the strength of the new cement material's anchoring can be determined.

[0040] Exemplarily, the upper ring body 1 and the lower ring body 9 are both circular rings; the inner ring size of the lower ring body 9 is larger than the inner ring size of the upper ring body 1. The inner diameter of the lower ring body 9 is larger than the inner diameter of the upper ring body 1.

[0041] In the above configuration, the circular ring is simple and easy to process. When placed on the anchor rod, it fits naturally, facilitating stable operation. Alternatively, a polygonal ring can be used. In specific engineering scenarios, such as when installation space is limited or when the ring needs to fit within surrounding structures, the polygonal edges can be used for positioning or to adapt to specific spatial layouts. Regardless of the shape, when combined with the clamping block 4, bevel block 10, and other components, the operating principle is consistent with the main scheme: the upper and lower ring bodies 9 move relative to each other, and the bevel block 10 pushes the clamping block 4 to clamp the anchor rod, achieving the strength test process.

[0042] Exemplarily, the first elastic member 7 includes a spring 71, a U-shaped connecting seat 72 and a pressure plate 73, one end of the spring 71 is fixedly connected to the end of the accommodating groove 6, the other end of the spring 71 is rotatably connected to the U-shaped connecting seat 72, and the pressure plate 73 is rotatably connected to the U-shaped connecting seat 72 via a rotating shaft.

[0043] During use, the pressure plate 73 is attached to the anchor rod, and the spring 71 keeps the clamping block 4 in its initial position in the channel 2. When the clamping block 4 is pushed toward the anchor rod by the inclined block 10, the clamping block 4 squeezes the U-shaped connector 72, which compresses the spring 71, which stores energy. At the same time, due to the structural connection, the position of the pressure plate 73 changes accordingly, and it subsequently participates in the anchor rod clamping process. Throughout the entire process, the spring 71 provides basic elastic force to ensure the initial position of the clamping block 4 and buffer the clamping force; the U-shaped connector acts as a transitional connector to achieve effective force transmission and direction conversion; the pressure plate 73 can better fit the surface of the anchor rod, enhancing the clamping effect. The overall structure is compact and works in coordination, improving the clamping reliability of the device.

[0044] Exemplarily, the pressing plate 73 includes an upper sub-plate and a lower sub-plate, and the angle between the upper sub-plate and the lower sub-plate is 140°-170°.

[0045] The upper sub-plate has a receiving opening 11, which is fitted with an elastic rubber wheel 12. The lower front side of the lower sub-plate has an anti-slip strip 13. The upper back portion of the lower sub-plate is connected to the clamping block 4 via a third elastic member 14. A guide post 15 is fixedly connected to the back of the U-shaped connector 72; the clamping block 4 has a guide slot 16, into which the guide post 15 slidably engages.

[0046] During the anchor rod insertion stage, this angle causes the lower side of the pressure plate 73 to tilt outward, and the third elastic member 14 supports the upper side of the lower sub-plate to maintain this tilted state, so that the device can be smoothly inserted into the anchor rod. The elastic rubber wheel 12 can roll in contact with the anchor rod, and because the lower side is tilted, the anti-slip strip 13 does not contact the anchor rod, reducing the movement resistance; during the clamping stage, the clamping block 4 squeezes the lower sub-plate of the pressure plate 73 to press the anchor rod. The angle design ensures that the pressure plate 73 deforms reasonably, effectively transmits the clamping force, and the anti-slip strip 13 presses against the anchor rod to increase friction.

[0047] When the device is initially inserted into the anchor rod, the elastic rubber wheel 12 rolls in contact with the anchor rod due to the inclination of the pressure plate 73. Firstly, the friction between the device and the anchor rod is reduced, making the insertion process smooth and speeding up the operation; secondly, the rolling contact is softer than the sliding friction, which reduces damage to the anchor rod surface, protects the integrity of the anchor rod, and ensures that the accuracy of subsequent detection is not affected by the previous insertion operation.

[0048] During the insertion stage, due to the inclination of the pressure plate 73, the anti-slip strip 13 does not contact the anchor rod, and does not affect the smoothness of insertion; during the clamping stage, the clamping block 4 squeezes the pressure plate 73, so that the lower sub-plate presses the anchor rod, and the anti-slip strip 13 fits tightly to the surface of the anchor rod, increasing the friction coefficient, preventing the anchor rod from sliding relative to the clamping block 4 during tension testing, ensuring stable transmission of the clamping force, and ensuring that the detection force accurately acts on the anchor point between the anchor rod and the cement material.

[0049] During the movement of the clamping block 4, whether it is initially positioned by the first elastic member 7, avoided when inserted, or pushed by the inclined block 10 and linked with other components during clamping, the guide column 15 slides in the guide groove 16, playing a precise guiding role, limiting the moving direction of the clamping block 4, preventing the clamping block 4 from deflecting or twisting, ensuring the linear movement of the clamping block 4, and stably cooperating with the inclined surface 5 of the inclined block 10, so that the direction of the clamping force is accurate.

[0050] Working principle of the present invention:

[0051] When testing the strength of an anchor bolt secured in cement, first place the hydraulic cylinder over the vertically fixed, partially exposed anchor bolt. Next, align the upper and lower ring bodies 1 and 9 of the testing device with the anchor bolt and insert them from top to bottom. Initially, the clamping block 4 is positioned relatively inward of the inner ring opening of the channel 2. The inclined surface 5 of the clamping block 4 does not fit tightly against the inclined block 10, leaving a gap to allow the upper and lower ring bodies 1 and 9 to slide smoothly into the anchor bolt.

[0052] As the upper ring body 1 and the lower ring body 9 continue to move downward, the lower ring body 9 presses on the upper end of the hydraulic cylinder, the upper ring body 1 continues to descend, and the inclined block 10 fixed on the lower ring body 9 gradually enters the through hole 3 and the channel 2. Because the inclined surface of the inclined block 10 and the inclined surface 5 of the clamping block 4 are designed to fit each other, the upward pushing action of the inclined block 10 will generate a component of force on the clamping block 4 outward, that is, toward the anchor rod.

[0053] When the clamping block 4 securely grips the anchor rod and the lower ring 9 presses against the top of the hydraulic cylinder, the cylinder begins to operate. The cylinder extends, and its top exerts an upward pulling force on the anchor rod, which is anchored in the cement material. As the pulling force gradually increases, the anchoring force between the anchor rod and the cement material resists the pulling force until the cement material reaches its limit of anchoring the anchor rod. By monitoring the force applied by the hydraulic cylinder and other parameters such as the displacement of the anchor rod, the degree of anchoring of the new cement material to the anchor rod can be determined.

[0054] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0055] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A cement material strength detection device, characterized in that: The invention comprises an upper ring body (1), wherein a plurality of channels (2) are provided in an annular manner at equal intervals inside the upper ring body (1), one end of the channel (2) is connected to the inner ring of the upper ring body (1), and the end of the channel (2) away from the inner ring of the upper ring body (1) is connected to a through hole (3), a clamping block (4) is slidably connected in the channel (2), and the end of the clamping block (4) away from the channel (2) is provided with an inclined surface (5), and the clamping block (4) is provided with a receiving groove (6) at one end of the inner ring of the upper ring body (1), and a first elastic member (7) is fixedly connected to the receiving groove (6), and one end of the first elastic member (7) extends to the outside of the receiving groove (6); The lower side of the upper ring body (1) is connected to the lower ring body (9) via a second elastic member (8); the upper side of the lower ring body (9) is fixedly connected to an inclined block (10); the inclined block (10) extends into the through hole (3) and the channel (2); the inclined surface of the inclined block (10) is slidably fitted to the inclined surface (5) of the clamping block (4).

2. A cement material strength detection device according to claim 1, characterized in that: The upper ring body (1) and the lower ring body (9) are both circular rings; the inner ring size of the lower ring body (9) is larger than the inner ring size of the upper ring body (1).

3. The cement material strength detection device according to claim 1, wherein: The first elastic member (7) comprises a spring (71), a U-shaped connecting seat (72) and a pressure plate (73), one end of the spring (71) is fixedly connected to the end of the accommodating groove (6), the other end of the spring (71) is rotatably connected to the U-shaped connecting seat (72), and the pressure plate (73) is rotatably connected to the U-shaped connecting seat (72) via a rotating shaft.

4. A cement material strength detection device according to claim 3, characterized in that: The pressing plate (73) comprises an upper sub-plate and a lower sub-plate, and the angle between the upper sub-plate and the lower sub-plate is 140°-170°.

5. A cement material strength detection device according to claim 4, characterized in that: The upper sub-plate is provided with an accommodating opening (11), and an elastic rubber wheel (12) is provided in the accommodating opening (11).

6. A cement material strength detection device according to claim 4, characterized in that: The lower side of the front surface of the lower sub-plate is provided with an anti-slip strip (13), and the anti-slip strip (13) has several groups.

7. A cement material strength detection device according to claim 4, characterized in that: The upper portion of the back surface of the lower sub-plate is connected to the clamping block (4) via a third elastic member (14).

8. The cement material strength detection device according to claim 4, characterized in that: The back of the U-shaped connecting seat (72) is fixedly connected with a guide post (15); The clamping block (4) is provided with a guide groove (16), and the guide column (15) is slidably inserted into the guide groove (16).

9. The cement material strength detection device according to claim 1, wherein: The inner diameter of the lower ring body (9) is greater than the inner diameter of the upper ring body (1).

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