A steel bar on-site detection device for project management

Abstract

The present invention relates to the field of steel bar detection, and particularly provides a on-site detection device for steel bars used in project management, including: a main anchor, on which a first through hole for the steel bar to pass through is provided; a jack, arranged below the main anchor; an auxiliary positioning device, including a reaction ring arranged below the jack and an auxiliary anchor arranged between the reaction ring and the jack; wherein, the auxiliary anchor is provided with a second through hole for the steel bar to pass through, and the second through hole is coaxially arranged with the first through hole. In the solution of the present invention, the auxiliary anchor and the main anchor are set to perform double-point positioning on the steel bar together, thereby improving the positioning accuracy of the steel bar and further improving the detection accuracy.

Description

Technical Field

[0001] The present invention relates to the field of steel bar detection, and particularly to a on-site detection device for steel bars used in project management. Background Art

[0002] The detection principle of the pull-out test is based on the mechanical principle. By applying a pull-out force to the steel bar embedded in the concrete, observing the displacement of the steel bar, the change in the magnitude of the pull-out force, and the failure mode of the concrete surface, the bond strength between the steel bar and the concrete, as well as the bearing capacity and safety of the steel bar, can be evaluated.

[0003] The Chinese patent document with the application publication number CN117007509A discloses a device for detecting the pull-out bond force and acoustic emission data of steel bars, including a bearing platform for placing the concrete test block, a positioning member for fixing the position of the concrete test block, a jacking mechanism (i.e., a jack) fixedly installed at the top of the positioning member, and a pull-out anchor installed at the top of the jacking mechanism.

[0004] In the prior art, when detecting steel bars, the anchor can only achieve single-point positioning at the top of the jack, with relatively low positioning accuracy, thus affecting the measurement accuracy. Moreover, the anchor can only perform single-point anchoring on the steel bar, and the jack and the steel bar are not necessarily coaxial. During the application of the pulling force, the pulling force direction will be skewed from the direction in which the steel bar is implanted, resulting in inaccurate test results. In addition, before measurement, multiple components such as the anchor and the jack need to be sleeved in sequence, with cumbersome operation and inconvenient use. Summary of the Invention

[0005] One object of the present invention is to improve the measurement accuracy of the on-site detection device for steel bars used in project management.

[0006] Another object of the present invention is to reduce the operation difficulty of the on-site detection device for steel bars used in project management.

[0007] Specifically, the present invention provides an on-site detection device for steel bars used in project management, including: a main anchor with a first through-hole for the steel bar to pass through; a jack disposed below the main anchor; an auxiliary positioning device including a reaction ring disposed below the jack and an auxiliary anchor disposed between the reaction ring and the jack; wherein, the auxiliary anchor has a second through-hole for the steel bar to pass through, and the second through-hole is coaxially arranged with the first through-hole.

[0008] Further, the auxiliary positioning device further includes: a housing disposed between the reaction ring and the jack. A first sleeve and a second sleeve coaxial with the second through-hole are provided on one side of the housing facing the jack. Among them, the second sleeve is located on the periphery of the first sleeve. A limiting end face is provided on the inner wall of the second sleeve, and the height of the limiting end face on the second sleeve is higher than that of the first sleeve. The auxiliary anchor is movably disposed in the first sleeve along the axial direction of the first sleeve, and the jack is embedded in the second sleeve and abuts against the limiting end face.

[0009] Further, a first annular inclined surface is provided on the inner wall of the first sleeve. The first annular inclined surface is located at one end of the first sleeve close to the jack and gradually approaches the axis of the first sleeve from the end face of the first sleeve. The outer wall surface of the auxiliary anchor is adapted to the inner wall surface of the first sleeve. One end of the auxiliary anchor close to the reaction ring passes through the housing, and the other end is formed with a plurality of slits, and each slit communicates with the second through-hole.

[0010] Further, the auxiliary positioning device further includes: a tension spring disposed between the reaction ring and the auxiliary anchor. One end of the tension spring is fixedly connected to the reaction ring, and the other end is connected to the auxiliary anchor. A plurality of compression springs are disposed between the reaction ring and the housing. One end of each compression spring is connected to the reaction ring, and the other end is connected to the housing. Among them, the plurality of compression springs are evenly distributed around the tension spring.

[0011] Further, the auxiliary positioning device includes: a fixing piece sleeved on one end of the auxiliary anchor passing through the housing and fixedly connected to the tension spring. The fixing piece is threadedly connected to the auxiliary anchor.

[0012] Further, the jack includes: a cylinder body including an inner cylinder and an outer cylinder disposed coaxially. One end of the annular chamber formed by the inner cylinder and the outer cylinder is closed, and the other end is open. A piston plate is movably disposed in the annular chamber along the axial direction of the cylinder body, and an oil chamber is formed by the piston plate, the inner cylinder and the outer cylinder. A liquid through-hole is provided on the wall surface of the outer cylinder and communicates with the oil chamber.

[0013] Further, the on-site inspection equipment for steel bars used in project management further includes: an oil pump connected to the liquid through-hole through an oil pipe.

[0014] Further, the jack further includes: a piston rod sleeved on the inner cylinder, one end connected to the piston plate, and the other end protruding from the end face of the cylinder body. An end cover is provided at one end of the cylinder body close to the main anchor to close the annular chamber. The main anchor is provided at one end of the piston rod protruding from the cylinder body.

[0015] Further, the main anchor includes: an anchor ring sleeved on the piston rod; a plurality of wedge-shaped jaws disposed in the anchor ring, and a first through-hole is formed at the center of the wedge-shaped jaws.

[0016] Further, the inner wall of the anchor ring forms a second annular inclined surface, which gradually approaches the axis starting from the end of the anchor ring away from the jack; the outer wall surface of the wedge grip is adapted to the inner wall surface of the anchor ring.

[0017] The beneficial effects of the present invention are as follows:

[0018] The on-site inspection equipment for steel bars in engineering management of the present invention, by setting the auxiliary anchor and positioning the steel bar at two points together with the main anchor, improves the positioning accuracy of the steel bar, and further improves the inspection accuracy.

[0019] Further, for the on-site inspection equipment for steel bars in engineering management of the present invention, by setting the first sleeve and the second sleeve coaxial with the second through hole and embedding the jack in the second sleeve, the jack and the second through hole are coaxial, ensuring that the force application direction of the jack is consistent with the implantation direction of the steel bar, thereby improving the inspection accuracy.

[0020] Further, for the on-site inspection equipment for steel bars in engineering management of the present invention, by setting structures such as a tension spring, a compression spring and a fixing piece, the auxiliary anchor can maintain the positioning before the jack starts to apply pressure and gradually release the positioning by itself when the jack starts to apply pressure, thus ensuring that the force application direction of the jack is consistent with the implantation direction of the steel bar. At the same time, connecting the jack and the auxiliary positioning device together to form an integrated structure simplifies the operation steps of the on-site inspection equipment for steel bars in engineering management and reduces the operation difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the drawings in an exemplary but non-limiting manner. The same reference numerals in the drawings denote the same or similar components or parts. In the drawings:

[0022] Figure 1 is a schematic structural diagram of the on-site inspection equipment for steel bars in engineering management according to an embodiment of the present invention;

[0023] Figure 2 is a schematic cross-sectional view of the on-site inspection equipment for steel bars in engineering management according to an embodiment of the present invention;

[0024] Figure 3 is Figure 2 a schematic enlarged view of area A in;

[0025] Figure 4 is Figure 2 a schematic enlarged view of area B in;

[0026] Figure 5 is an exploded schematic diagram of the on-site inspection equipment for steel bars in engineering management according to an embodiment of the present invention;

[0027] Figure 6It is a schematic structural diagram of an anchor ring of a steel bar on-site detection device for project management according to an embodiment of the present invention;

[0028] Figure 7 It is a schematic structural diagram of an auxiliary anchor of a steel bar on-site detection device for project management according to an embodiment of the present invention;

[0029] Figure 8 It is a schematic structural diagram of a housing of a steel bar on-site detection device for project management according to an embodiment of the present invention.

[0030] Among them: 100, main anchor; 110, anchor ring; 111, second annular inclined surface; 120, wedge; 121, first through hole; 200, jack; 210, cylinder body; 211, inner cylinder; 212, outer cylinder; 2121, liquid through hole; 213, annular chamber; 220, piston plate; 230, oil chamber; 240, piston rod; 250, end cover; 300, oil pump; 310, oil pipe; 400, auxiliary positioning device; 410, reaction ring; 420, auxiliary anchor; 421, second through hole; 422, slit; 430, housing; 431, first sleeve; 4311, first annular inclined surface; 4312, limiting ring; 432, second sleeve; 4321, limiting end face; 440, tension spring; 450, compression spring; 460, fixing piece. Detailed implementation manners

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below through embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] The terms "first" and "second" in this article are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features, that is, include one or more of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. When a certain feature "includes or contains" a certain or certain features it covers, unless otherwise specifically described, this indicates that other features are not excluded and other features may be further included.

[0033] Unless otherwise clearly specified or defined, the terms "installation", "connection", "attachment", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. Those of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0034] It should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0035] In the present invention, unless otherwise clearly specified or defined, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower horizontal level than the second feature.

[0036] The following refers to Figures 1 to 8 to describe a on-site steel bar detection device for engineering management provided by the present invention.

[0037] Figure 1 is a schematic structural diagram of a on-site steel bar detection device for engineering management according to an embodiment of the present invention. Figure 2 is along Figure 1 a schematic cross-sectional view of a on-site steel bar detection device for engineering management in an embodiment of Figure 3 is Figure 2 a schematic enlarged view of area A in Figure 4 is Figure 2 a schematic enlarged view of area B in

[0038] This embodiment first provides a on-site steel bar detection device for engineering management. The on-site steel bar detection device for engineering management generally can include: a main anchor 100, a jack 200, and an auxiliary positioning device 400.

[0039] The main anchor 100 is provided with a first through hole 121 for the steel bar to pass through. The jack 200 is arranged below the main anchor 100. The auxiliary positioning device 400 generally may include a reaction ring 410 arranged below the jack 200, and an auxiliary anchor 420 arranged between the reaction ring 410 and the jack 200. Among them, the auxiliary anchor 420 is provided with a second through hole 421 for the steel bar to pass through, and the second through hole 421 is coaxially arranged with the first through hole 121.

[0040] When the on-site detection equipment for steel bars in project management detects the steel bars, the auxiliary positioning device 400, the jack 200, and the main anchor 100 are sequentially sleeved on the steel bar to be detected. The reaction ring 410 in the auxiliary positioning device 400 is sleeved on the steel bar and is in direct contact with the wall or ground where the steel bar is implanted, and is used to bear the force exerted by the jack 200 towards the wall or ground during the detection process, avoiding direct contact between the jack 200 and the wall surface or ground, and ensuring that there is no interference between the jack and the wall or ground. The main anchor 100 is sleeved on the steel bar, and is pressured by the operator to make the main anchor 100 clamp the steel bar and limit the position of the steel bar. The jack 200 exerts a force in the direction away from the jack 200 on the main anchor 100. Since the main anchor 100 clamps the steel bar, the force exerted by the jack 200 is transmitted to the steel bar, making the steel bar receive a pulling force in the direction away from the jack 200. After the jack 200 is pressured to a certain extent, by observing the pressure relief situation of the jack 200 and whether cracks or damages appear on the wall or ground, it is judged whether the bond strength between the steel bar and the wall or ground, as well as the bearing capacity and safety of the steel bar, are qualified.

[0041] In the solution of this embodiment, by setting the second through hole 421 on the auxiliary anchor 420 to be coaxial with the first through hole 121 on the main anchor 100, the steel bar is double-point anchored by using the auxiliary anchor 420 and the main anchor 100, thereby improving the positioning accuracy of the steel bar, and further improving the detection accuracy of the on-site detection equipment for steel bars in project management.

[0042] The main anchor 100 and the auxiliary anchor 420 are respectively arranged at both ends of the jack 200, so that the two anchor points are dispersedly arranged on the steel bar, further improving the positioning effect of the main anchor 100 and the auxiliary anchor 420 on the steel bar.

[0043] Figure 5 It is an exploded schematic diagram of the on-site detection equipment for steel bars in project management according to an embodiment of the present invention. Figure 6 It is a structural schematic diagram of the anchor ring of the on-site detection equipment for steel bars in project management according to an embodiment of the present invention. Figure 7 It is a structural schematic diagram of the auxiliary anchor of the on-site detection equipment for steel bars in project management according to an embodiment of the present invention. Figure 8It is a schematic structural diagram of the housing of the on-site steel bar detection equipment for engineering management according to an embodiment of the present invention.

[0044] The auxiliary positioning device 400 generally may further include a housing 430.

[0045] The housing 430 is disposed between the reaction ring 410 and the jack 200. On the side of the housing 430 facing the jack 200, a first sleeve 431 and a second sleeve 432 coaxial with the second through hole 421 are provided. Among them, the second sleeve 432 is located on the periphery of the first sleeve 431. A limiting end face 4321 is provided on the inner wall of the second sleeve 432, and the height of the limiting end face 4321 on the second sleeve 432 is higher than the height of the first sleeve 431. The auxiliary anchor 420 is movably disposed in the first sleeve 431 along the axial direction of the first sleeve 431, and the jack 200 is embedded in the second sleeve 432 and abuts against the limiting end face 4321.

[0046] In the solution of this embodiment, by providing the first sleeve 431 and the second sleeve 432 coaxial with the second through hole 421 and embedding the jack 200 in the second sleeve 432, the jack 200 and the second through hole 421 are coaxially arranged, ensuring that the force application direction of the jack 200 is consistent with the implantation direction of the steel bar, thereby improving the detection accuracy.

[0047] The height of the limiting end face 4321 on the second sleeve 432 is set to be higher than the height of the first sleeve 431, so as to avoid the interference of the jack 200 on the movement of the auxiliary anchor 420 in the first sleeve 431 while ensuring the coaxiality of the jack 200.

[0048] In some preferred embodiments, the outer wall size of the jack 200 is adapted to the inner wall size of the second sleeve 432, so that the jack 200 is just embedded in the second sleeve 432, thereby ensuring the coaxiality between the jack 200 and the second sleeve 432. At the same time, the jack 200 and the housing 430 and other structures are connected together to form an assembled whole, reducing the operation difficulty in the actual detection process.

[0049] A first annular inclined surface 4311 is provided on the inner wall of the first sleeve 431. The first annular inclined surface 4311 is located at one end of the first sleeve 431 close to the jack 200 and gradually approaches the axis of the first sleeve 431 from the end face of the first sleeve 431. The outer wall surface of the auxiliary anchor 420 is adapted to the inner wall surface of the first sleeve 431. One end of the auxiliary anchor 420 close to the reaction ring 410 passes through the housing 430, and the other end is formed with a plurality of slits 422, and each slit 422 communicates with the second through hole 421.

[0050] In the solution of this embodiment, a first annular inclined surface 4311 is provided on the inner wall of the first sleeve 431. The outer wall surface of the auxiliary anchor 420 is adapted to the inner wall surface of the first sleeve 431. A plurality of slits 422 passing through the second through hole 421 are further provided at one end of the auxiliary anchor 420 away from the reaction ring 410. When the auxiliary anchor 420 moves relative to the first sleeve 431 in the direction close to the reaction ring 410, one end of the auxiliary anchor 420 away from the reaction ring 410 can be tightened under the extrusion of the first sleeve 431, thereby improving the positioning accuracy of the auxiliary anchor 420 for the steel bar. When the auxiliary anchor 420 moves relative to the first sleeve 431 in the direction away from the reaction ring 410, one end of the auxiliary anchor 420 away from the reaction ring 410 can be relaxed, so as to facilitate the steel bar to pass through the second through hole 421 smoothly to complete positioning.

[0051] In some preferred embodiments, four slits 422 communicating with the second through hole 421 can be provided at one end of the auxiliary anchor 420 away from the reaction ring 410. The four slits 422 form a cross shape, dividing the end of the auxiliary anchor 420 into four equal parts, so as to better clamp the steel bar under the extrusion of the first sleeve 431.

[0052] In some preferred embodiments, the auxiliary anchor 420 is made of alloy steel to improve the wear resistance and corrosion resistance of the auxiliary anchor 420 and extend its service life.

[0053] The auxiliary positioning device 400 generally may further include: a tension spring 440 and a plurality of compression springs 450.

[0054] The tension spring 440 is arranged between the reaction ring 410 and the auxiliary anchor 420. One end of the tension spring 440 is fixedly connected to the reaction ring 410, and the other end is connected to the auxiliary anchor 420. A plurality of compression springs 450 are arranged between the reaction ring 410 and the housing 430. One end of each compression spring 450 is connected to the reaction ring 410, and the other end is connected to the housing 430; wherein, the plurality of compression springs 450 are uniformly distributed around the tension spring 440.

[0055] In the solution of this embodiment, by setting the tension spring 440 to be connected to the auxiliary anchor 420 and arranging a plurality of compression springs 450 between the reaction ring 410 and the housing 430, the housing 430 tends to move away from the reaction ring 410 under the action of the compression springs 450, while the auxiliary anchor 420 tends to move close to the reaction ring 410 under the pulling force of the tension spring 440, so that the auxiliary anchor 420 tends to move close to the reaction ring 410 relative to the first sleeve 431, thereby improving the positioning effect of the auxiliary anchor 420.

[0056] In the solution of this embodiment, a plurality of compression springs 450 are evenly arranged around the tension spring 440, so that the pressures provided by the plurality of compression springs 450 on the housing 430 are evenly distributed, improving the stability of the overall structure of the on-site steel bar detection equipment for engineering management.

[0057] In some preferred embodiments, the spring constant of the compression spring 450 is configured to be greater than that of the tension spring 440. When the on-site steel bar detection equipment for engineering management has not started detection, the initial elastic force of the compression spring 450 is configured to be small, that is, the initial compression amount of the compression spring 450 is very small, while the initial tensile amount of the tension spring 440 is large, and the tension of the tension spring 440 is used to complete positioning. After the on-site steel bar detection equipment for engineering management starts detection, the jack 200 starts to apply pressure, driving the housing 430 to approach the reaction ring 410, thereby increasing the compression amount of the compression spring 450 and gradually reducing the tensile amount of the tension spring 440 until it is completely eliminated. After the tensile amount of the tension spring 440 is completely eliminated, the auxiliary anchor 420 releases the limit on the steel bar (that is, the auxiliary anchor 420 no longer clamps the steel bar), thus avoiding the influence of the auxiliary anchor 420 clamping the steel bar on the detection accuracy. At the same time, due to the relatively large spring constant of the compression spring 450, after the tensile amount of the tension spring 440 is completely eliminated, the pressure of the compression spring 450 has increased significantly. Even when detecting the steel bars horizontally implanted on the wall, after the auxiliary anchor 420 releases the limit, the friction force can be used to ensure that the jack 200 does not slip under the action of gravity, thereby ensuring the detection accuracy.

[0058] The on-site steel bar detection equipment provided by the solution of this embodiment can ensure that the jack 200 does not slip whether detecting the steel bars vertically implanted on the ground or the steel bars horizontally implanted on the wall, which not only improves the detection accuracy, but also has more applicable scenarios and stronger practicability.

[0059] The auxiliary positioning device 400 generally may further include a fixing piece 460. The fixing piece 460 is sleeved on one end of the auxiliary anchor 420 passing through the housing 430 and is fixedly connected to the tension spring 440. The fixing piece 460 is threadedly connected to the auxiliary anchor 420.

[0060] In the solution of this embodiment, by setting the fixing piece 460 at the end of the tension spring 440 far from the reaction ring 410 and threadedly connecting the fixing piece 460 to one end of the auxiliary anchor 420 passing through the housing 430, the tension spring 440 and the auxiliary anchor 420 are connected together. The threaded connection is convenient for disassembly and assembly. During the actual detection process, the auxiliary anchor 420 with different hole diameters can be replaced, so that the on-site steel bar detection equipment for engineering management can detect steel bars with different diameters, improving the practicability.

[0061] As Figures 7 - 8As shown, a limiting ring 4312 is formed on the inner wall of the first sleeve 431, and a corresponding stepped surface is formed on the auxiliary anchor 420. When the auxiliary anchor 420 moves along the axis of the first sleeve 431, after the auxiliary anchor 420 approaches the reaction ring 410 by a certain distance, the stepped surface of the auxiliary anchor 420 abuts against the limiting ring 4312. After the auxiliary anchor 420 moves away from the reaction ring 410 by a certain distance, the fixing piece 460 threadedly connected to the auxiliary anchor 420 abuts against the housing 430. This prevents the auxiliary anchor 420 from slipping off the housing 430 during movement, ensures the positioning accuracy, and improves the structural stability.

[0062] Generally, the jack 200 may include: a cylinder body 210, a piston plate 220, a liquid passage hole 2121, and an oil pump 300.

[0063] Generally, the cylinder body 210 may include an inner cylinder 211 and an outer cylinder 212 arranged coaxially. One end of the annular chamber 213 formed by the inner cylinder 211 and the outer cylinder 212 is closed, and the other end is open. The piston plate 220 is movably arranged along the axial direction of the cylinder body 210 in the annular chamber 213, and an oil chamber 230 is formed among the piston plate 220, the inner cylinder 211, and the outer cylinder 212. The liquid passage hole 2121 is arranged on the wall surface of the outer cylinder 212 and communicates with the oil chamber 230.

[0064] In the solution of this embodiment, the cylinder body 210 of the jack 200 is set to be composed of two layers, namely the inner cylinder 211 and the outer cylinder 212, making the jack 200 a hollow structure, so as to ensure that the steel bar can pass through the jack 200 smoothly and be in limit cooperation with the main anchor 100.

[0065] In the solution of this embodiment, by arranging the piston plate 220, an annular sealed oil chamber 230 is formed between the piston plate 220, the inner cylinder 211, and the outer cylinder 212. The annular oil chamber 230 not only makes the force on the piston plate 220 more uniform, but also ensures that the force application direction is consistent with the direction of the steel bar.

[0066] As Figure 4 shown, generally, the liquid passage hole 2121 is arranged at a position of the outer cylinder 212 close to the bottom of the oil chamber 230 to ensure the sealing performance of the oil chamber 230 when the piston plate 220 moves. In some embodiments, an interface may also be provided at the liquid passage hole 2121 of the outer cylinder 212, and the interface is threadedly connected to the oil pipe 310 to improve the airtightness.

[0067] Generally, the on-site detection equipment for steel bars used in project management may also include an oil pump 300. The oil pump 300 is connected to the liquid passage hole 2121 through an oil pipe 310.

[0068] In the solution of this embodiment, by providing an oil pump 300, the oil pump 300 is connected to the liquid passage hole 2121 through an oil pipe 310, so as to apply pressure by delivering oil to the oil chamber 230 of the jack 200, causing the piston plate 220 to axially move relative to the cylinder body 210. This not only has simple operation but also ensures uniform and stable pressurization.

[0069] Generally, a display device can be provided on the oil pump 300 to display the magnitude of the pressure applied by the oil pump 300 in real time.

[0070] In some embodiments, the oil pump 300 can be manually controlled for pressurization. In other embodiments, the oil pump 300 can automatically pressurize to a set pressure.

[0071] Generally, the jack 200 can further include: a piston rod 240 and an end cap 250.

[0072] The piston rod 240 is sleeved on the inner cylinder 211, one end is connected to the piston plate 220, and the other end protrudes from the end face of the cylinder body 210. The end cap 250 is arranged at one end of the cylinder body 210 close to the main anchor 100 to close the annular chamber 213. The main anchor 100 is arranged at one end of the piston rod 240 protruding from the cylinder body 210.

[0073] In the solution of this embodiment, by providing the end cap 250 to close the open end of the annular chamber 213, the airtightness of the jack 200 is improved.

[0074] As Figure 3 shown, the piston rod 240 is sleeved on the inner cylinder 211, the inner wall surface of the piston rod 240 contacts the annular end face protruding radially on the inner cylinder 211, reducing the frictional resistance between the piston rod 240 and the inner cylinder 211. The outer wall surface of the piston rod 240 contacts the end cap 250. The inner cylinder 211 and the end cap 250 jointly clamp the piston rod 240, causing the piston rod 240 to axially move, further ensuring the coaxiality between the force application direction of the jack 200 and the steel bar implantation direction, and thus improving the detection accuracy.

[0075] In some preferred embodiments, sealing rings can also be provided between the inner cylinder 211 and the piston rod 240, and between the piston rod 240 and the end cap 250 to further improve the sealing performance of the jack 200.

[0076] Generally, the main anchor 100 can include: an anchor ring 110 and wedge grips 120.

[0077] The anchor ring 110 is sleeved on the piston rod 240. The wedge grips 120 are arranged in the anchor ring 110, and a first through hole 121 is formed at the center of the wedge grips 120.

[0078] In the solution of this embodiment, the anchor ring 110 is sleeved on the piston rod 240, and the pressure of the oil pump 300 is transmitted to the anchor ring 110 by the piston rod 240, and then the pressure is transmitted to the steel bar through the wedge-shaped jaws 120.

[0079] The wedge-shaped jaws 120 are generally made of alloy steel. When the on-site inspection equipment for steel bars in project management is ready to start inspection, the wedge-shaped jaws 120 are sleeved on the steel bar by the operator and then inserted into the anchor ring 110 to fasten and limit the steel bar. In some embodiments, the wedge-shaped jaws 120 can be composed of several parts spliced together, which is convenient for installation and improves the fastening effect of the wedge-shaped jaws 120 on the steel bar.

[0080] The inner wall of the anchor ring 110 forms a second annular inclined surface 111, and the second annular inclined surface 111 gradually approaches the axis starting from the end of the anchor ring 110 far from the jack 200. The outer wall surface of the wedge-shaped jaws 120 is adapted to the inner wall surface of the anchor ring 110.

[0081] In the solution of this embodiment, by providing the second annular inclined surface 111 on the inner wall of the anchor ring 110, when the piston rod 240 applies a thrust force to the anchor ring 110 in the direction away from the jack 200, the wedge-shaped jaws 120 will tightly squeeze the steel bar under the pressure of the anchor ring 110, avoiding slippage between the wedge-shaped jaws 120 and the steel bar, thereby improving the inspection accuracy of the on-site inspection equipment for steel bars in project management.

[0082] In the solution of this embodiment, by providing structures such as a tension spring 440, a compression spring 450, and a fixing piece 460, the auxiliary anchor 420 can be positioned before the jack 200 starts to apply pressure and gradually release the positioning automatically when the jack 200 starts to apply pressure, thereby ensuring that the force application direction of the jack 200 is consistent with the implantation direction of the steel bar. At the same time, the jack 200 and the auxiliary positioning device 400 are connected together to form an integrated structure, simplifying the operation steps of the on-site inspection equipment for steel bars in project management and reducing the operation difficulty.

[0083] The specific working process of the on-site inspection equipment for steel bars in project management provided by the present invention will be described in combination with the above embodiments:

[0084] The on-site inspection equipment for steel bars used in project management is sleeved on the steel bar along the implanted direction of the steel bar. The steel bar first passes through the reaction ring 410 and the tension spring 440, and extends into the second through hole 421 of the auxiliary anchor 420. The steel bar continues to move relative to the auxiliary anchor 420, driving the auxiliary anchor 420 away from the reaction ring 410 by means of friction, so that the end of the auxiliary anchor 420 with the slit 422 is relaxed, facilitating the smooth passage of the steel bar through the auxiliary anchor 420. After the steel bar passes through the second through hole 421, it enters the cylinder body 210 of the jack 200 and finally passes through the anchor ring 110 provided at the top of the jack 200. At this time, the on-site inspection equipment for steel bars used in project management has been completely sleeved on the steel bar, and the reaction ring 410 has abutted against the wall / floor where the steel bar is implanted. Then, the wedge 120 is sleeved on the steel bar by the operator and inserted into the anchor ring 110 to clamp and limit the steel bar.

[0085] After the on-site inspection equipment for steel bars used in project management has been completely sleeved on the steel bar, the auxiliary anchor 420 moves along the first sleeve 431 in the direction close to the reaction ring 410 under the pulling force of the tension spring 440, and the end of the auxiliary anchor 420 with the slit 422 is tightened under the extrusion of the first sleeve 431, thereby limiting the steel bar.

[0086] After the on-site inspection equipment for steel bars used in project management starts to detect, the oil pump 300 transports oil into the oil cavity 230 through the oil pipe 310, applying pressure to the oil cavity 230. The pressure applied by the oil cavity 230 is transmitted to the main anchor 100 through the piston plate 220 and the piston rod 240, and then transmitted to the steel bar to be detected, so that the steel bar is subjected to a pulling force in the direction away from the wall / floor. During the process of the oil pump 300 continuously applying pressure, the pressure value applied by the oil pump 300 is displayed through the display device provided on the oil pump 300. After the pressure applied by the oil pump 300 reaches the strength value corresponding to the steel bar to be detected (determined according to the model size of the steel bar), the oil pump 300 stops pressurizing and maintains this load for a certain period of time (in some embodiments, the time for maintaining the load can be preferably set to 2 minutes). Then, observe whether the change in the pressure value displayed on the display device of the oil pump 300 is within the specified range (in some embodiments, the specified range of the change in the pressure value can be preferably set to not exceed 5%). If the change in the pressure value meets the requirements, after removing the on-site inspection equipment for steel bars used in project management, observe the steel bar and the wall or floor where the steel bar is implanted to check whether there are cracks or local damages. If there are no cracks or local damages, the detection is qualified; otherwise, it is unqualified.

[0087] After the oil pump 300 starts to apply pressure, the cylinder body 210 of the jack 200 moves relative to the piston in the direction close to the reaction ring 410. The cylinder body 210 squeezes the housing 430, increasing the compression amount of the compression spring 450, resulting in an increase in the pressure of the compression spring 450. At the same time, the stretching amount of the tension spring 440 gradually decreases until it is completely eliminated. After the stretching amount of the tension spring 440 is completely eliminated, the end of the auxiliary anchor 420 with the slit 422 relaxes, releasing the limit on the steel bar and preventing it from affecting the test results. That is to say, during the process of the pressure increase of the compression spring 450, the auxiliary anchor 420 plays an anchoring role in the early stage until the pressure of the compression spring 450 reaches a relatively large value, and then the anchoring effect on the steel bar is cancelled. At this time, due to the increase in the pressure of the compression spring 450, under the pressure of the compression spring 450, the jack 200 will not slip either, thus ensuring the coaxiality of the jack 200 and the steel bar, and further improving the test accuracy.

[0088] After the on-site inspection equipment for steel bars used in project management finishes the inspection, the operator removes the wedge 120 inside the anchor ring 110, then presses the fixing piece 460 to move the auxiliary anchor 420 into the jack 200, releases the limit on the steel bar, and finally smoothly withdraws the entire instrument.

[0089] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0090] The above-described embodiments only represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A on-site inspection device for steel bars used in project management, characterized in that, Comprising: A main anchor, on which a first through hole for a steel bar to pass through is provided; A jack, arranged below the main anchor; An auxiliary positioning device, including a reaction ring arranged below the jack and an auxiliary anchor arranged between the reaction ring and the jack; wherein, a second through hole for a steel bar to pass through is provided on the auxiliary anchor, and the second through hole is coaxially arranged with the first through hole; The auxiliary positioning device further includes: A housing, arranged between the reaction ring and the jack, and a first sleeve and a second sleeve coaxial with the second through hole are arranged on one side of the housing facing the jack; wherein, the second sleeve is located outside the first sleeve; a limiting end face is arranged on the inner wall of the second sleeve, and the height of the limiting end face on the second sleeve is higher than that of the first sleeve; the auxiliary anchor is movably arranged in the first sleeve along the axial direction of the first sleeve, and the jack is embedded in the second sleeve and abuts against the limiting end face; A tension spring, arranged between the reaction ring and the auxiliary anchor, with one end fixedly connected to the reaction ring and the other end connected to the auxiliary anchor; A plurality of compression springs, arranged between the reaction ring and the housing, with one end of each compression spring connected to the reaction ring and the other end connected to the housing; wherein, the plurality of compression springs are evenly distributed around the tension spring.

2. The on-site inspection equipment for steel bars used in project management according to claim 1, characterized in that, A first annular inclined surface is arranged on the inner wall of the first sleeve, and the first annular inclined surface is located at one end of the first sleeve close to the jack and gradually approaches the axis of the first sleeve from the end face of the first sleeve; the outer wall surface of the auxiliary anchor is adapted to the inner wall surface of the first sleeve; One end of the auxiliary anchor close to the reaction ring passes through the housing, and the other end is formed with a plurality of slits, and each slit communicates with the second through hole.

3. The on-site inspection equipment for steel bars used in project management according to claim 1, characterized in that, The auxiliary positioning device includes: A fixing piece, sleeved on one end of the auxiliary anchor passing through the housing and fixedly connected to the tension spring; The fixing piece is threadedly connected to the auxiliary anchor.

4. The on-site inspection equipment for steel bars used in project management according to claim 1, characterized in that The jack includes: A cylinder body, including an inner cylinder and an outer cylinder arranged coaxially, and one end of the annular chamber formed by the inner cylinder and the outer cylinder is closed and the other end is open; A piston plate, movably arranged in the annular chamber along the axial direction of the cylinder body, and an oil chamber is formed by the piston plate, the inner cylinder and the outer cylinder; A liquid through hole, arranged on the wall surface of the outer cylinder and communicating with the oil chamber.

5. The on-site inspection equipment for steel bars used in project management according to claim 4, characterized in that, Further including: An oil pump, connected to the liquid through hole through a oil pipe.

6. The on-site inspection equipment for steel bars used in project management according to claim 4, characterized in that, The jack further includes: A piston rod, sleeved on the inner cylinder, with one end connected to the piston plate and the other end protruding from the end face of the cylinder body; An end cover, arranged at one end of the cylinder body close to the main anchor to close the annular chamber; The main anchor is arranged at one end of the piston rod protruding from the cylinder body.

7. The on-site inspection equipment for steel bars used in project management according to claim 6, characterized in that, The main anchor includes: An anchor ring, sleeved on the piston rod; Wedge-shaped gripping blocks, arranged in the anchor ring, and the first through hole is formed at the center of the wedge-shaped gripping blocks.

8. The on-site inspection equipment for steel bars used in engineering management according to claim 7, characterized in that, A second annular inclined surface is formed on the inner wall of the anchor ring, and the second annular inclined surface gradually approaches the axis from one end of the anchor ring far from the jack; The outer wall surface of the wedge clip is adapted to the inner wall surface of the anchor ring.

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