Equipment for detecting and loading support mesh

Abstract

The invention discloses equipment for detecting and loading a support mesh. The equipment comprises a structural frame; the two end sides of the mounting lifting frame table are connected with the structural frame in an up-down sliding mode, and a plurality of sets of connecting hole positions are distributed in the mounting lifting frame table in an array mode; the multiple sets of net piece fixing rod pieces are detachably connected to the corresponding connecting hole positions according to the row pitch layout of the underground supporting system, and the lower ends of the multiple sets of net piece fixing rod pieces are fixedly connected with supporting net pieces to be loaded. The loading device is detachably connected to the hanging lifting frame table, and a displacement sensor and a pressure sensor are fixed to the loading moving end of the loading device; the computer control system is arranged on the outer side of the structural frame, receives and processes detection data of the displacement sensor and the pressure sensor and obtains mechanical parameters of the supporting mesh, and the computer control system controls the working state of the loading device in a linkage mode. According to the invention, the loading force test on the support mesh under different support conditions can be simulated, and workers can be assisted to comprehensively evaluate the mesh quality.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coal mine roadway support mesh quality detection, and particularly relates to a device for detecting and loading a support mesh. BACKGROUND

[0002] The current coal mine roadway support mesh quality detection means has limitations, and the traditional detection method cannot accurately simulate the actual support environment in the mine to test the mechanical properties of the mesh, cannot accurately obtain the mechanical property data of the mesh under different stress conditions, and cannot comprehensively evaluate the quality and safety of the support mesh. In the prior art, the detection of the coal mine roadway support mesh may use a relatively simple loading method, such as single-point loading or loading conditions that are greatly different from the actual conditions in the mine. Some detection devices cannot simulate the interval distance of the support system in the mine for loading, and are not intelligent in data acquisition and processing, and are mostly manually recorded data, which is low in efficiency and poor in accuracy, and cannot comprehensively reflect the mechanical properties of the mesh.

[0003] The current manual loading of the support mesh cannot truly simulate the actual working conditions of the roadway support system in the mine, resulting in a deviation between the detection results and the actual performance of the mesh in the mine, and cannot provide accurate references for support design.

[0004] Manual recording of data is prone to errors, and cannot generate key data such as force-displacement curves in real time, cannot intuitively display the change process of the mechanical properties of the mesh, and is not conducive to in-depth analysis of the performance of the mesh.

[0005] There is a lack of comprehensive monitoring and analysis function of various mechanical parameters, which makes it difficult to comprehensively evaluate the quality of the mesh and affects the safety of the coal mine roadway support.

[0006] Therefore, how to provide a device that can truly simulate the coal mine roadway support environment and detect the quality of the support mesh is a problem that needs to be solved by those skilled in the art. SUMMARY

[0007] Therefore, the present application provides a coal mine roadway support mesh loading test device that can simulate the design interval distance of the roadway support system in the mine, accurately perform mechanical loading tests on the support mesh, automatically generate force-displacement data curves, effectively detect the mechanical properties of different forms of mesh, and provide reliable basis for coal mine roadway support mesh quality detection.

[0008] In order to achieve the above purpose, the present application adopts the following technical scheme: a device for detecting and loading a support mesh, comprising:

[0009] a structural frame;

[0010] The mounting lifting frame is horizontally arranged and slidably connected to the structural frame on both ends, and a plurality of groups of connecting holes are arranged on the mounting lifting frame;

[0011] A plurality of groups of mesh fixing rods are arranged according to the interval distance of the underground support system, and are detachably connected to the corresponding connecting holes, and the lower ends of the plurality of groups of mesh fixing rods are fixedly connected to the support mesh to be loaded.

[0012] A loading device is detachably connected to the mounting lifting frame and provides a loading load for the support mesh, and a displacement sensor and a pressure sensor are fixed to the loading end of the loading device.

[0013] A computer control system is arranged outside the structural frame, receives and processes the detection data of the displacement sensor and the pressure sensor, and obtains the mechanical parameters of the support mesh, and the computer control system controls the working state of the loading device.

[0014] The structure frame provides a support base for related components, the mounting lifting frame provides a support base for the support mesh, the plurality of groups of mesh fixing rods can simulate different support system interval distances to fix the support mesh, the loading device can load the support mesh, simulate the loading condition of the support mesh, and the displacement sensor and the pressure sensor can accurately obtain the support mesh compression condition under different support system interval distances, and the computer control system processes and generates a corresponding force-displacement relationship curve to assist personnel in comprehensively evaluating the quality of the support mesh and providing accurate reference for subsequent connection of the coal mine roadway support mesh.

[0015] Preferably, a lead screw lifting mechanism is fixedly connected to the edge end of the mounting lifting frame, the lead screw lifting mechanism is composed of a worm gear, a worm, a lead screw and a box accessory, the worm gear and the worm are engaged and rotated on the inside of the box accessory, the box accessory is fixedly connected to the mounting lifting frame, the inner wall of the worm gear is provided with a thread, the lead screw is vertically arranged and threadedly connected to the worm gear, the two ends of the lead screw pass through the box accessory and are fixedly connected to the structural frame, and rotation of the worm and the worm gear promotes the box accessory to ascend and descend relative to the lead screw.

[0016] The technical effect generated thereby is that the mounting lifting frame can be lifted relative to the structural frame by the lead screw lifting mechanism, the loading space is adjusted to adapt to the stress test of different specifications of support mesh, and the test efficiency is improved.

[0017] Preferably, the mounting lifting frame is fixedly connected with a power motor, the power motor is electrically connected with the computer control system, the plurality of screw rod lifting mechanisms are arranged on both side edges of the mounting lifting frame, and the power motor is in transmission connection with the plurality of screw rod lifting mechanisms through a transmission rod.

[0018] The technical effect is that the power motor provides a power source for the screw rod lifting mechanism, and the power motor can be replaced by a hydraulic drive pump and only needs to output rotary power.

[0019] Preferably, the structural frame has a plurality of columns, the columns are provided with sliding rails on the side walls of the mounting lifting frame, and the mounting lifting frame is fixedly connected with sliding seats which are in sliding connection with the sliding rails.

[0020] The technical effect is that the structural frame provides a bearing base for the mounting lifting frame, and the columns provide a sliding base for the mounting lifting frame.

[0021] Preferably, the plurality of mesh fixing rods each include a support rod and a clamping plate, the support rod is detachably connected to a connecting hole in the bottom of the mounting lifting frame, the clamping plate is bolted to the lower portion of the support rod, and the support rod and the clamping plate clamp the support mesh therebetween.

[0022] The technical effect is that the plurality of mesh fixing rods can clamp and fix the support mesh according to the simulated support condition.

[0023] Preferably, the plurality of mesh fixing rods each further include a bearing rod and a cable, the bearing rod is fixedly connected to the top of the mounting lifting frame and corresponds to the upper portion of the support rod, the mounting lifting frame is provided with a through hole extending from the top to the bottom, the support rod and the bearing rod are hollow rods, the clamping plate has a through hole, one end of the cable is fixed with a node, the node is supported on the bottom of the clamping plate, and the other end of the cable sequentially passes through the clamping plate, the support rod, the mounting lifting frame and is positioned at the top end of the bearing rod.

[0024] The technical effect is that the clamping plate and the support rod can be fixed by the cable, which is convenient for mounting and reduces the process of bolt connection between the clamping plate and the support rod.

[0025] Preferably, the loading device includes an oil cylinder seat and a loading oil cylinder, the oil cylinder seat is detachably connected to the mounting lifting frame, the loading oil cylinder is vertically arranged and fixedly connected to the oil cylinder seat, a piston rod of the loading oil cylinder is a loading moving end and provides a downward loading force, the loading oil cylinder is connected to a hydraulic working station in a pipeline, and the hydraulic working station is controlled in a working state by the computer control system.

[0026] The resulting technical effect is that the cylinder seat can be fixed on the mounting lifting frame according to the actual required loading position, and the loading cylinder is driven by the hydraulic system to load, which can provide a wide range of loading loads.

[0027] Preferably, an abutment plate contacting the support mesh is fixed to the bottom end of the piston rod, the pressure sensor is fixed to the bottom of the abutment plate, and the displacement sensor is fixed to the top of the abutment plate.

[0028] The resulting technical effect is: the abutment plate increases the contact area with the support mesh. During specific use, the outer peripheral size of the abutment plate is larger than the hole size of the support mesh. The abutment plate also provides an installation basis for the pressure sensor and displacement sensor. The pressure sensor directly contacts the support mesh and can obtain more accurate front-end data.

[0029] Preferably, an automatic sensing door is provided on the outer side of the structural frame close to the staff, and the automatic sensing door is electrically connected to the computer control system.

[0030] The resulting technical effect is that the automatic sensing door is linked to the computer control system, which stops the loading process when the door is opened, thereby improving the safe use performance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is an overall structural diagram of a coal mine tunnel support mesh loading test device according to the present invention;

[0032] Figure 2 This is a front view of a coal mine tunnel support mesh loading test device according to the present invention;

[0033] Figure 3 This is a schematic diagram of the connection between the mounting and lifting frame platform and the support mesh of a coal mine tunnel support mesh loading test equipment of the present invention;

[0034] Figure 4 This is a schematic diagram of the assembly of a screw lifting mechanism and a power motor of a coal mine tunnel support mesh loading test equipment of the present invention;

[0035] Figure 5 This is a schematic diagram of the connection between the support mesh and multiple groups of mesh fixing rods of a coal mine tunnel support mesh loading test equipment of the present invention;

[0036] Figure 6 This is a schematic diagram of the first type of mesh fixing rod structure of a support mesh of a coal mine tunnel support mesh loading test equipment of the present invention;

[0037] Figure 7 This is a schematic diagram of the second mesh fixing rod structure of the support mesh of a coal mine tunnel support mesh loading test equipment of the present invention;

[0038] Figure 8 It is a loading device structure diagram of a coal mine roadway supporting mesh loading test equipment of the present application;

[0039] Figure 9 It is a hanging lifting frame table and multiple mesh fixing rod connection diagram of a coal mine roadway supporting mesh loading test equipment of the present application.

[0040] 1structure frame, 11stand column, 12slide rail, 2hanging lifting frame table, 21connecting hole, 22through hole, 23sliding seat, 3multiple mesh fixing rod, 31supporting rod, 32clamping plate, 33bearing rod, 34cable, 4supporting mesh, 5loading device, 51cylinder seat, 52loading cylinder, 521piston rod, 522abutment disc, 6computer control system, 7hydraulic workstation, 8screw lifting mechanism, 81screw rod, 82box body accessory, 9power motor, 91transmission rod, 10automatic induction door. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0042] Refer to the drawings of the present application Figures 1 to 9 According to the device for detecting and loading supporting mesh of the embodiment of the present application, the device comprises:

[0043] structure frame 1, the structure frame 1 is a six-stand column square frame;

[0044] hanging lifting frame table 2, the hanging lifting frame table 2 is horizontally arranged, which is a multiple grid frame structure, the two ends of the hanging lifting frame table 2 are connected to the stand columns of the structure frame 1 in an up-down sliding manner, and the hanging lifting frame table 2 is arrayed with multiple connecting holes 21; in specific implementation, the lifting range of the hanging lifting frame table 2 is 500 mm;

[0045] multiple mesh fixing rods 3, the multiple mesh fixing rods 3 are arranged according to the interval distance of the underground supporting system and are connected to the corresponding connecting holes 21, the lower end of the multiple mesh fixing rods 3 is fixedly connected to the supporting mesh 4 to be loaded, and different supporting conditions can be simulated;

[0046] Loading device 5 is detachably connected to the mounting lifting frame 2 and provides a load for the supporting mesh 4. The position of the loading device 5 on the mounting lifting frame 2 can be changed as needed. The loading moving end of the loading device 5 passes through the grid gap on the mounting lifting frame 2 and acts on the supporting mesh below. The loading moving end is fixed with a displacement sensor and a pressure sensor to obtain relevant displacement and pressure data.

[0047] Computer control system 6 is arranged outside the structural frame 1. The computer control system 6 receives and processes the detection data of the displacement sensor and the pressure sensor and obtains the mechanical parameters of the supporting mesh 4. The computer control system 6 controls the working state of the loading device 5. The computer control system relies on the software to calculate the relevant data, and can be equipped with LS-DYNA and other related application software.

[0048] In some other embodiments, a lead screw lifting mechanism 8 is further included. The lead screw lifting mechanism 8 is fixedly connected to the edge end of the mounting lifting frame 2. The lead screw lifting mechanism 8 includes a worm gear, a worm, a lead screw 81, and a box accessory 82. The worm gear and the worm are engaged and rotate inside the box accessory 82. The box accessory 82 is fixedly connected to the mounting lifting frame 2. The inner wall of the worm gear is provided with a screw thread. The lead screw 81 is arranged vertically and is screw-connected to the worm gear. The two ends of the lead screw 81 pass through the box accessory 82 and are fixedly connected to the structural frame 1. The rotation of the worm and the worm gear promotes the box accessory 82 to move up and down relative to the lead screw 81.

[0049] The core principle is that the worm promotes the rotation of the worm gear. The worm gear rotates relative to the lead screw, but the lead screw does not move. That is, the worm gear moves up and down, and then the box accessory and the mounting lifting frame move up and down.

[0050] Specifically, a power motor 9 is fixedly connected to the mounting lifting frame 2. The power motor 9 is electrically connected to the computer control system 6. There are four groups of lead screw lifting mechanisms 8 arranged at the two side edges of the mounting lifting frame 2. The power motor 9 is drivingly connected to the worms of the four groups of lead screw lifting mechanisms 8 through a transmission rod 91, thereby completing the lifting process of the mounting lifting frame.

[0051] In specific implementation, the power motor can be replaced by a hydraulic pump, but the hydraulic pump needs to be powered by a hydraulic station. The purpose is to provide a power source for the worm.

[0052] In some other specific embodiments, the structural frame 1 has a plurality of columns 11. The columns 11 are provided with slide rails 12 near the side walls of the mounting lifting frame 2. The two side ends of the mounting lifting frame 2 are fixedly provided with sliding seats 23 which are slidingly connected with the slide rails, thereby ensuring the stability of the mounting lifting frame 2 in moving up and down.

[0053] The plurality of groups of net fixing rods 3 each comprise a supporting rod 31 and a clamping plate 32, the supporting rod 31 is detachably connected to the connecting hole at the bottom of the hanging lifting frame 2, the clamping plate 32 is bolted to the lower part of the supporting rod 31, and the clamping plate 32 is clamped and fixed between the supporting rod 31.

[0054] In addition, there is another connection and fixing mode, the plurality of groups of net fixing rods 3 each further comprise a bearing rod 33 and a cable 34, the bearing rod 33 is fixedly connected to the top of the hanging lifting frame 2 and corresponds to the upper part of the supporting rod 31, the hanging lifting frame 2 is provided with a through hole 22 penetrating the upper and lower parts, the supporting rod 31 and the bearing rod 33 are hollow rod members, the clamping plate 32 has a through hole, one end of the cable 34 is fixedly connected to a limiting node, the node is abutted against the bottom of the clamping plate 32, the other end of the cable 34 is sequentially threaded through the clamping plate 32, the supporting rod 31, the hanging lifting frame 2 and positioned at the top end of the bearing rod 33, and the specific positioning mode can be that a reinforcing sleeve is connected to the top end of the cable, the reinforcing sleeve has an external thread, and the positioning process is completed by abutting the nut on the outer side of the reinforcing sleeve against the top end of the bearing rod.

[0055] In other embodiments, the loading device 5 comprises a cylinder seat 51 and a loading cylinder 52, the cylinder seat 51 is detachably connected to the hanging lifting frame 2, and the loading cylinder 52 is vertically arranged and fixedly connected to the cylinder seat 51, the piston rod 521 of the loading cylinder 52 is a loading moving end and provides a downward loading force, the loading cylinder 52 is connected to an external hydraulic working station 7 in a pipeline mode, and the hydraulic working station 7 is controlled in a working state by the computer control system 6.

[0056] A mute type servo oil source is adopted, and the rated working pressure is 25 MPa. The fully-closed design effectively prevents foreign matters from entering the hydraulic system, protects the hydraulic oil and the oil pump, the motor set for driving the oil pump is configured in a double-elastic support mode, and noise is reduced. The hydraulic system adopts a load sensing technology, the pressure output is stable, the system pressure is adjusted through a PID self-adaptive function, the pressure output precision is ±1%, and stable and reliable power is provided for the loading test.

[0057] Specifically, the bottom end of the piston rod 521 is fixedly connected to an abutting disc 522 abutting against the supporting net 4, a pressure sensor is fixedly connected to the bottom of the abutting disc 522, and a displacement sensor is fixedly connected to the top of the abutting disc 522.

[0058] More specifically, the automatic sensing door 10 is arranged on the outer side of the structural frame 1 close to the staff, the automatic sensing door 10 is electrically connected to the computer control system 6, and the loading test cannot be performed when the door is opened.

[0059] The device of the application is provided with an emergency stop button, a monitoring system is installed on the top of the structural frame, each angle picture can be arbitrarily switched, each data and curve in the test process can be displayed on the monitoring system, and the safety of the test personnel and the safety and monitorability of the test process are ensured.

[0060] The computer control system of the present application can collect and process data in real time, automatically generate force-displacement data curve, and transmit main parameters (load, displacement, etc.) to external data collection system through analog output or digital output, etc., to realize synchronous collection with external system.

[0061] The device can improve detection accuracy: accurately simulate the interval of the underground roadway support system to perform loading test, and the obtained data more truly reflects the mechanical properties of the support mesh in actual use, providing reliable basis for support design and ensuring the safety of coal mine roadway support.

[0062] Intelligent data processing: the computer control system automatically generates force-displacement curve, collects and processes various mechanical parameters in real time, improves data collection and analysis efficiency, reduces manual error, and facilitates in-depth study of mesh mechanical properties.

[0063] Multifunctional and strong adaptability: the loading space and oil cylinder position can be adjusted to meet the testing needs of different specifications of mesh and different intervals, and has wide application range.

[0064] High use safety: perfect safety protection device and monitoring system ensure the personal safety of test personnel and ensure the safety and reliability of the test process.

[0065] For the device and use method disclosed in the embodiments, since they correspond to the method disclosed in the embodiments, the description is relatively simple, and the relevant part can be referred to the method part.

[0066] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for detecting loaded support mesh, characterized in that: include: Structural frame (1); A mounting lifting frame platform (2), wherein the mounting lifting frame platform (2) is arranged horizontally, and its two end sides slide up and down to connect with the structural frame (1), and a plurality of groups of connection holes (21) are arranged in an array on the mounting lifting frame platform (2); Multiple groups of mesh fixing rods (3), wherein the multiple groups of mesh fixing rods (3) are disassembled and connected to corresponding connection holes (21) according to the spacing layout of the downhole support system, and the lower ends of the multiple groups of mesh fixing rods (3) are fixedly connected to the support mesh (4) to be loaded; A loading device (5), the loading device (5) is detachably connected to the mounting lifting frame platform (2) and provides a loading load for the supporting mesh (4), and a displacement sensor and a pressure sensor are fixed to the loading movable end of the loading device (5); A computer control system (6) is arranged outside the structural frame (1), the computer control system (6) receives and processes detection data from the displacement sensor and the pressure sensor and obtains mechanical parameters of the support mesh (4), and the computer control system (6) controls the working state of the loading device (5) in a linked manner.

2. The device for detecting a loaded support mesh according to claim 1, characterized in that: The invention also includes a screw lifting mechanism (8), wherein the screw lifting mechanism (8) is fixedly connected to the edge of the mounting lifting frame (2), and the screw lifting mechanism (8) includes a worm wheel, a worm, a screw (81) and a box attachment (82). The worm wheel and the worm are meshed and rotated on the inner side of the box attachment (82). The box attachment (82) is fixedly connected to the mounting lifting frame (2). The inner wall of the worm wheel is provided with a thread. The screw (81) is vertically arranged and threadedly connected to the worm wheel. Both ends of the screw (81) pass through the box attachment (82) and are fixedly connected to the structural frame (1). The rotation of the worm and the worm wheel causes the box attachment (82) to rise and fall relative to the screw (81).

3. The device for detecting a loaded support mesh according to claim 2, characterized in that: A power motor (9) is fixedly connected to the mounting lifting frame (2), and the power motor (9) is electrically connected to the computer control system (6). The screw lifting mechanism (8) has multiple groups and is arranged on both side ends of the mounting lifting frame (2). The power motor (9) is connected to the worm of the multiple groups of screw lifting mechanisms (8) through a transmission rod (91).

4. The device for detecting a loaded support mesh according to claim 1, characterized in that: The structural frame (1) has a plurality of columns (11), and the columns (11) are provided with slide rails (12) on the side walls close to the mounting lifting frame platform (2). The two side ends of the mounting lifting frame platform (2) are fixed with sliding seats (23) that are slidably connected to the slide rails.

5. The device for detecting a loaded support mesh according to claim 1, characterized in that: The multiple groups of mesh fixing rods (3) all include support rods (31) and clamping plates (32), wherein the support rods (31) are detachably connected to the connection holes at the bottom of the mounting lifting frame (2), and the clamping plates (32) are bolted to the bottom of the support rods (31), and the support mesh (4) is clamped between the clamping plates (32) and the support rods (31).

6. The device for detecting a loaded support mesh according to claim 5, characterized in that: The multiple groups of mesh fixing rods (3) also include a load-bearing rod (33) and a cable (34). The load-bearing rod (33) is fixedly connected to the top of the mounting lifting frame (2) and is located one-to-one above the support rod (31). The mounting lifting frame (2) is provided with a through hole (22) passing through the upper and lower sides. The support rod (31) and the load-bearing rod (33) are both hollow rods. The splint (32) is perforated. One end of the cable (34) is fixed with a node, and the node is supported on the bottom of the splint (32). The other end of the cable (34) passes through the splint (32), the support rod (31), the mounting lifting frame (2) in sequence and is positioned at the top of the load-bearing rod (33).

7. The device for detecting a loaded support mesh according to claim 1, characterized in that: The loading device (5) comprises a cylinder seat (51) and a loading cylinder (52). The cylinder seat (51) is detachably connected to the mounting lifting frame platform (2). The loading cylinder (52) is arranged vertically and fixedly connected to the cylinder seat (51). The piston rod (521) of the loading cylinder (52) is a loading moving end and provides a downward loading force. The pipeline of the loading cylinder (52) is connected to an external hydraulic workstation (7). The working state of the hydraulic workstation (7) is controlled by the computer control system (6).

8. The device for detecting a loaded support mesh according to claim 7, characterized in that: The bottom end of the piston rod (521) is fixed with an abutment plate (522) that contacts the support mesh (4), the pressure sensor is fixed to the bottom of the abutment plate (522), and the displacement sensor is fixed to the top of the abutment plate (522).

9. The device for detecting a loaded support mesh according to claim 1, characterized in that: An automatic sensing door (10) is provided on the outer side of the structural frame (1) close to the staff, and the automatic sensing door (10) is connected to the computer control system (6) via an electrical signal.

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