A system and method for automatically cleaning a jacked-out anchor rod torque nut damper

Abstract

The present application relates to the technical field of switching automatic anchor rod drilling machine, and particularly relates to a system and method for automatically cleaning the anchor rod torque nut damping body. The system comprises a transmission shaft, a stepped blind hole is formed in the center of the transmission shaft, the stepped blind hole is connected with a flushing liquid source through a communication hole; an anchor rod body and a damping body are inserted into the stepped blind hole; a torque nut is sleeved on the anchor rod body, the torque nut is fastened with the transmission shaft through a connecting sleeve and a locking disc, and the torque nut is installed on an anchor rod centering tray. The present application can realize automatic cleaning of the ejected damping body, ensure smooth execution of the automatic anchor rod installation whole process of the switching automatic anchor rod drilling machine, ensure the anchor rod installation quality, and reduce the labor intensity of the support worker.

Description

Technical Field

[0001] This invention relates to the field of switching automatic anchor drilling rig technology, and in particular to a system and method for automatically cleaning the ejected anchor torque nut damping body. Background Technology

[0002] There are three types of anchor bolt torque nuts: pressure plate nuts, pin nuts, and damping nuts. Each type is widely used in underground anchor bolt support in coal mines. The working principle of the damping torque nut is as follows: a certain thickness of nylon damping body is filled or screwed into one end of the thickened nut. When used underground, the tray and nut are placed on one end of the rod, and connected to the drilling rig through the nut and connecting sleeve. The drilling rig is started to drive the rod to stir the resin cartridge. After the cartridge has cured, the drilling rig is started again to push out the damping body, and the nut is tightened by the drilling rig to complete the anchor bolt installation.

[0003] The switching automatic anchor bolt drilling rig includes a drill box, anchor box, and propulsion device, enabling full automation of the anchor bolt installation process. The anchor box is used to load the anchor bolts and tighten the anchor bolt torque nut. A connecting sleeve is installed at the end of the anchor box's drive shaft. During the tightening of the damping torque nut, the damping body pushed out by the bolt falls onto the drive shaft end face. If the continuously pushed-out damping body is not cleaned, it will accumulate on the drive shaft end face, easily affecting the smooth execution of the automatic support process and consequently the quality of the anchor bolt installation. Manually cleaning the damping body is time-consuming and labor-intensive, affecting the tunnel excavation speed and exposing support workers to unsupported areas, creating safety hazards. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a system and method for automatically cleaning the damping body of the ejected anchor bolt torque nut.

[0005] The present invention adopts the following technical solution: a system for automatically cleaning the ejected anchor rod torque nut damping body, comprising: a drive shaft, wherein a stepped blind hole is machined at the center of the drive shaft, and the stepped blind hole is connected to a flushing fluid source through a connecting hole;

[0006] An anchor rod and a damping body are inserted into the blind hole of the step; the anchor rod is fitted with a torque nut, which is fastened to the drive shaft through a connecting sleeve and a locking disc. The torque nut is installed on the anchor rod self-aligning tray.

[0007] In some embodiments, a pressure valve, an electromagnetic control valve, and a flow sensor are sequentially connected between the flushing fluid source and the connecting hole. A first pressure sensor is connected between the pressure valve and the electromagnetic control valve, and a second pressure sensor is connected between the flow sensor and the drive shaft. The drive shaft is fixed together with a displacement sensor.

[0008] In some embodiments, the stepped blind hole includes a countersunk hole and a bottom hole, the diameter of the countersunk hole being slightly larger than the diameter of the damping body, and the depth of the countersunk hole being greater than the sum of the height of the damping body and the length of the anchor rod inserted into the blind hole.

[0009] In some embodiments, a misoperation prevention device is also included, which includes:

[0010] The judgment module is used to identify whether the anchor box is retracting along the direction of advance, whether the direct distance between the connecting sleeve and the torque nut can be monitored, whether there is flushing fluid in the flushing circuit, whether the electromagnetic control valve is successfully opened, and whether the ejected damping body is successfully cleaned.

[0011] The monitoring module is used to monitor in real time the pushing distance between the connecting sleeve and the torque nut, the flushing fluid source pressure, the pressure at the drive shaft, and the flushing fluid flow rate in the flushing circuit.

[0012] The control module is used to control the opening and closing of the solenoid control valve and adjust the set pressure of the pressure valve in the flushing circuit.

[0013] The reporting module is used to report faults such as anchor box retraction failure, failure to monitor advance distance, lack of flushing fluid source, and failure of electromagnetic control valve to open.

[0014] A method for automatically cleaning the ejected anchor bolt torque nut damper includes:

[0015] S101: When the anchor box retracts along the pushing direction after the torque nut is tightened, the distance between the connecting sleeve and the torque nut in the pushing direction is monitored in real time.

[0016] S102: If the advance direction distance meets the preset advance direction distance condition, open the electromagnetic control valve of the anchor box flushing circuit, and then monitor the flushing fluid flow rate through the flushing circuit in real time.

[0017] S103: If the flushing fluid flow rate meets the preset value, close the solenoid control valve.

[0018] In some embodiments, between steps S101 and S102, it is further included to determine whether the distance between the connecting sleeve and the torque nut in the advancing direction is continuously increasing; if the determination result is that it is not continuously increasing, a fault is reported and the automatic support process of the automatic anchor drilling machine is terminated.

[0019] In some embodiments, the pressure valve operates at a preset pressure before real-time monitoring of the flushing fluid flow rate; the preset pressure is no greater than 0.5 MPa.

[0020] In some embodiments, after opening the solenoid control valve of the flushing circuit of the anchor box, the method further includes determining whether the solenoid control valve is open normally; if the determination result is that the solenoid control valve fails to open, a fault is reported and the automatic support process of the automatic anchor drilling rig is terminated; otherwise, subsequent steps are performed.

[0021] In some embodiments, before opening the solenoid control valve of the flushing circuit of the anchor box, the method further includes determining whether there is flushing fluid; if the determination result is no flushing fluid, a fault is reported and the automatic support process of the automatic anchor drilling rig is terminated; if the determination result is that there is flushing fluid, the solenoid control valve of the flushing circuit of the anchor box is opened.

[0022] In some embodiments, step S103 further includes a step of determining whether the damping body has been cleaned: if the determination result is not complete, the operating pressure of the pressure valve is automatically increased.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The method, system, and apparatus for automatically cleaning the damping body of the ejected anchor bolt torque nut provided in this invention monitor the distance between the connecting sleeve and the nut in the pushing direction in real time when the anchor box retracts along the pushing direction after the damping torque nut is tightened. When the pushing direction distance meets a preset pushing direction distance condition, the electromagnetic control valve of the flushing circuit of the anchor box is opened to further monitor the flushing fluid flow rate through the flushing circuit in real time. If the flushing fluid flow rate meets a preset value, the electromagnetic control valve is closed. This invention can realize the automatic cleaning of the ejected damping body, ensure the smooth execution of the entire automated anchor bolt installation process of the switching automatic anchor bolt drilling rig, ensure the quality of anchor bolt installation, and reduce the labor intensity of support workers. Attached Figure Description

[0025] Figure 1 This is a flowchart illustrating a method for automatically cleaning the ejected anchor bolt torque nut damping body provided by the present invention;

[0026] Figure 2 This is a logic diagram of a method for automatically cleaning the ejected anchor rod torque nut damping body provided by the present invention;

[0027] Figure 3 This is a schematic diagram of a system for automatically cleaning the ejected anchor bolt torque nut damping body provided by the present invention;

[0028] Figure 4 This is a schematic diagram of the transmission shaft structure in a system for automatically cleaning the ejected anchor bolt torque nut damping body provided by the present invention;

[0029] Figure 5 This is a schematic diagram showing the positional relationship between the damping body, the rod, and the drive shaft after the damping torque nut of the anchor box is tightened;

[0030] Figure 6 This is a schematic diagram of the structure of a device for automatically cleaning the ejected anchor bolt torque nut damping body provided by the present invention;

[0031] Figure label:

[0032] Anchor bolt body 1; Anchor bolt self-aligning tray 3; Torque nut 4; Connecting sleeve 5; Locking disc 6; Damping body 7; Friction-reducing washer 8; Self-aligning pad 9; Flushing fluid source 201; Pressure valve 202; Pressure sensor 203; Electromagnetic control valve 204; Flow sensor 205; Drive shaft 206; Displacement sensor 207; Central blind hole 2061; Blind hole countersunk hole 20611; First radial connecting hole 20621; Second radial connecting hole 20622. Detailed Implementation

[0033] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0034] The embodiments of the present invention are applied to the entire process of automating the installation of anchor bolts in a switching automatic anchor bolt drilling rig.

[0035] Figure 1 and Figure 2 This document presents a flowchart and logical intent illustrating a method for preventing misoperation in an electro-hydraulic controlled anchor drilling rig, as provided in an embodiment of the present invention. The method includes the following steps:

[0036] Step 101: When the anchor box retracts along the pushing direction after tightening the damping torque nut, the pushing distance between the connecting sleeve and the nut is monitored in real time.

[0037] In this embodiment, the monitoring of the distance between the connecting sleeve and the nut in the pushing direction is achieved by a displacement sensor or encoder; the initial working position of the connecting sleeve is preset as the zero displacement point, so the measured value is greater than or equal to 0; the maximum displacement point of the connecting sleeve is preset at the tightened thread position; an increase in the displacement value measured by the displacement sensor or encoder indicates that the connecting sleeve is moving forward in the pushing direction, and a decrease in the displacement value measured by the displacement sensor or encoder indicates that the connecting sleeve is retracting in the pushing direction; when the connecting sleeve retracts in the pushing direction, the difference between the maximum displacement value and the current displacement value of the connecting sleeve is the distance between the connecting sleeve and the nut in the pushing direction.

[0038] It also includes a step to determine whether the distance between the connecting sleeve and the nut in the advancing direction is continuously increasing. Specifically, if the distance between the connecting sleeve and the nut in the advancing direction is continuously increasing, it indicates that the connecting sleeve is retracting normally and that the displacement sensor or encoder is not faulty. If the determination result is that the distance is not continuously increasing, a fault is reported and the automatic support process of the automatic anchor drilling machine is terminated.

[0039] Step 102: If the propulsion direction distance meets the preset propulsion direction distance condition, open the electromagnetic control valve of the flushing circuit of the anchor box to further monitor the flow rate of the flushing fluid through the flushing circuit in real time.

[0040] In this embodiment, the preset advancing direction distance is 1.5 times the distance between the tail of the anchor rod and the end face of the connecting sleeve when the nut is tightened, and is related to the length of the threaded section at the tail of the anchor rod. An advancing direction distance greater than the preset advancing direction distance indicates that the portion of the anchor rod inserted into the anchor box has completely detached from the anchor box. If the judgment result is yes, the flushing circuit is connected by opening the electromagnetic control valve to further monitor the flow rate of the flushing fluid; in this embodiment, the monitoring of the flushing fluid flow rate is achieved through a flow sensor.

[0041] Before the step of real-time monitoring of the flushing fluid flow rate, there is a step where the pressure valve operates at a preset pressure: the preset pressure is generally no greater than 0.5 MPa.

[0042] The step of opening the electromagnetic control valve of the flushing circuit of the anchor box also includes a step of determining whether the electromagnetic control valve is open normally: In this embodiment, the opening monitoring of the electromagnetic control valve is achieved by a second pressure sensor connected to the second port of the electromagnetic control valve. If the measured pressure value is equal to the preset pressure, it indicates that the electromagnetic control valve is open normally. If the measured pressure value is 0, it indicates that the electromagnetic control valve has failed to open. If the judgment result is that the electromagnetic control valve has failed to open, the fault is reported and the automatic support process of the automatic anchor drilling machine is terminated.

[0043] Before opening the electromagnetic control valve of the anchor box flushing circuit, the process includes determining if there is flushing fluid: the pressure of the flushing fluid source is measured using a first pressure sensor; a pressure value of 0 indicates no flushing fluid is available. If the determination is that there is no flushing fluid, a fault is reported, and the automatic support process of the automatic anchor drilling rig is terminated. The flushing fluid can be clean water, an emulsion, hydraulic oil, or a specially formulated solution.

[0044] Step 103: If the flushing fluid flow rate meets the preset value, close the solenoid control valve.

[0045] In this embodiment, the preset flushing fluid flow rate is 10L / min. If the flow sensor measurement value is greater than the preset value, it indicates that the damping body has been cleaned, and the electromagnetic control valve is closed to stop flushing. If the judgment result is that the damping body has not been cleaned, the operating pressure of the pressure valve is automatically increased to further increase the impact force of the flushing fluid, making it easier to clean the damping body.

[0046] To implement the embodiments, the present invention also proposes a system for automatically cleaning the ejected anchor bolt torque nut damping body, the principle of which is as follows: Figure 3 As shown, it includes:

[0047] The flushing fluid source 201, pressure valve 202, solenoid control valve 204, first pressure sensor 203 and second pressure sensor 203, flow sensor 205, and anchor box drive shaft 206 are all connected in sequence to form a flushing circuit. The pressure valve 202, solenoid control valve 204, flow sensor 205, and drive shaft 206 are all two-port components. The flushing fluid flows in from the first port of the component and flows out from the second port of the component. The first pressure sensor 203 is connected in parallel between the second port of the pressure valve 202 and the first port of the solenoid control valve 204. The second pressure sensor 203 is connected in parallel between the second port of the flow sensor 205 and the first port of the drive shaft 206. The drive shaft 206 is fixed together with the displacement sensor 207. Specifically, in this embodiment, the flushing fluid source 201 is a flushing fluid source with sufficient flow, which can be a coal mine underground working face pipeline or a pump; usually, the flushing fluid source provides clean water, and in some embodiments, the flushing fluid source provides one of the following: emulsion, hydraulic oil, or a specially proportioned solution; in this embodiment, the pressure valve 202 is illustrated as an example of an electromagnetic proportional pressure reducing valve connected in series in the flushing circuit, and in some embodiments, the pressure valve can also be an electromagnetic proportional pressure reducing relief valve, an electromagnetic proportional relief valve, etc., or it can be connected in parallel in the circuit; in this embodiment, the electromagnetic control valve 204 is illustrated as an example of an electromagnetic directional valve, and in some embodiments, the electromagnetic control valve can also be an electromagnetic ball valve, an electromagnetic rotary valve, etc.; in this embodiment, the flow sensor 205 is a flow sensor with real-time measurement and communication functions, which can be an electronic gear flow meter or, in some embodiments, a turbine flow meter; in this embodiment, the displacement sensor 207 is a displacement sensor capable of real-time measurement and communication, which can be a wire displacement sensor, a magnetostrictive displacement sensor, or an encoder.

[0048] Among them, the drive shaft 206 has a stepped blind hole 2061 machined at its center, such as Figure 4 As shown, it includes: countersunk hole 20611, bottom hole 20612 and connecting hole 2062; wherein, in this embodiment there are two connecting holes 2062, and in some embodiments the number of connecting holes is 3 or 4.

[0049] Specifically, such as Figure 5As shown, the diameter of the countersunk hole 20611 is slightly larger than the diameter of the damper 7, and the depth of the countersunk hole 20611 is greater than the sum of the height of the damper 7 and the length of the rod 1 inserted into the blind hole 2061. Furthermore, after the rod 1 pushes the damper out of the torque nut 4, the damper 7 will not tilt or overturn, but will fall directly into the countersunk hole 20611 along the axial direction. As the tail end of the rod 7 is unscrewed from the bottom surface of the torque nut 4, it continues to push or slightly compress the damper 7, causing the damper 7 to form a slight seal with the countersunk hole 20611, rather than a tight seal. Furthermore, the flushing fluid enters the chamber formed by the damping body 7 and the countersunk hole 20611 after passing through the connecting hole 2062 and the bottom hole 20612. Part of the flushing fluid flows out through the annular gap, and part of it acts on the lower surface of the damping body to form an impact force. The magnitude of the impact force is proportional to the operating pressure of the pressure valve 202. When the pressure valve 202 is running at the preset pressure, the damping body 7 floats from the countersunk hole 20611 to the upper end face of the connecting sleeve at a very small speed. In order to ensure successful cleaning of the damping body 7, the operating pressure of the pressure valve 202 needs to be increased thereafter, and the flushing fluid flow rate increases accordingly.

[0050] Among them, the damping body 7 and the torque nut 4 are threaded together. The diameter of the damping body 7 varies with the specifications of the torque nut 4. Correspondingly, the diameter of the countersunk hole 20611 is serialized with the specifications of the torque nut 4. Furthermore, the drive shaft 206 is serialized with the diameter of the countersunk hole 20611. Specifically, for tightening a torque nut 4 of a certain specification, a corresponding drive shaft 206 is configured.

[0051] To implement the embodiments, the present invention also proposes an anti-misoperation device for electro-hydraulic controlled anchor drilling rigs, such as... Figure 6 As shown, it includes:

[0052] The judgment module 301 is used to identify whether the anchor box has retreated along the advancing direction, whether the direct distance between the connecting sleeve and the nut can be monitored, whether there is flushing fluid in the flushing circuit, whether the electromagnetic control valve has been successfully opened, and whether the ejected damping body has been successfully cleaned.

[0053] The monitoring module 302 is used to monitor in real time the pushing distance between the connecting sleeve and the nut, the flushing fluid source pressure, the pressure at the drive shaft, and the flushing fluid flow rate in the flushing circuit.

[0054] The control module 303 is used to control the opening and closing of the solenoid control valve and adjust the set pressure of the pressure valve in the flushing circuit.

[0055] The reporting module 304 is used to report faults such as anchor box retraction or failure to monitor advance distance, lack of flushing fluid source, and failure of electromagnetic control valve to open.

[0056] In the description of this specification, the terms "some embodiments," "example," "illustrative," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0057] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In the description of this specification, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] In the description of this specification, the terms “center,” “radial,” “axial,” “direction of advance,” “length,” “thickness,” “advance,” “retract,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention.

Claims

1. A method for automatically cleaning the damping body of an ejected anchor bolt torque nut, characterized in that, A system for automatically cleaning the ejected anchor torque nut damper body, the system comprising: a drive shaft (206), the drive shaft (206) having a connected stepped blind hole (2061) machined at its center, the stepped blind hole (2061) being connected to a flushing fluid source (201) through a connecting hole (2062); An anchor rod body (1) and a damping body (7) are inserted into the blind hole (2061) of the step; the anchor rod body (1) is fitted with a torque nut (4), and the torque nut (4) is fastened to the drive shaft (206) through the connecting sleeve (5) and the locking plate (6). The torque nut (4) is installed on the anchor rod self-aligning tray (3). The stepped blind hole (2061) includes a countersunk hole (20611) and a bottom hole (20612). The diameter of the countersunk hole (20611) is slightly larger than the diameter of the damping body (7), and the depth of the countersunk hole (20611) is greater than the sum of the height of the damping body (7) and the length of the anchor rod (1) inserted into the blind hole (2061). The flushing fluid source (201) and the connecting hole (2062) are connected in sequence to a pressure valve (202), an electromagnetic control valve (204) and a flow sensor (205). A first pressure sensor (203) is connected between the pressure valve (202) and the electromagnetic control valve (204). A second pressure sensor (203) is connected between the flow sensor (205) and the drive shaft (206). The drive shaft (206) is fixed together with a displacement sensor (207). It also includes a device to prevent misoperation, which includes: The judgment module (301) is used to identify whether the anchor box has retreated along the advancing direction, whether the direct distance between the connecting sleeve and the torque nut can be monitored, whether there is flushing fluid in the flushing circuit, whether the electromagnetic control valve has been successfully opened, and whether the ejected damping body has been successfully cleaned. The monitoring module (302) is used to monitor in real time the pushing distance between the connecting sleeve and the torque nut, the flushing fluid source pressure, the pressure at the drive shaft, and the flushing fluid flow rate of the flushing circuit; The control module (303) is used to control the opening and closing of the solenoid control valve and adjust the set pressure of the pressure valve in the flushing circuit. The reporting module (304) is used to report faults such as anchor box return failure, failure to monitor advance distance, lack of flushing fluid source, and failure to open electromagnetic control valve. The method includes: S101: When the anchor box retracts along the pushing direction after the torque nut is tightened, the distance between the connecting sleeve and the torque nut in the pushing direction is monitored in real time. S102: If the advance direction distance meets the preset advance direction distance condition, open the electromagnetic control valve of the anchor box flushing circuit, and then monitor the flushing fluid flow rate through the flushing circuit in real time. S103: If the flushing fluid flow rate meets the preset value, close the solenoid control valve.

2. The method for automatically cleaning the ejected anchor bolt torque nut damping body according to claim 1, characterized in that, Between steps S101 and S102, it is also necessary to determine whether the distance between the connecting sleeve and the torque nut in the advancing direction is continuously increasing; if the determination result is that it is not continuously increasing, then a fault is reported and the automatic support process of the automatic anchor drilling machine is terminated.

3. The method for automatically cleaning the ejected anchor bolt torque nut damping body according to claim 1, characterized in that, Before real-time monitoring of the flushing fluid flow rate, the pressure valve operates at a preset pressure; the preset pressure is no greater than 0.5 MPa.

4. The method for automatically cleaning the ejected anchor bolt torque nut damping body according to claim 1, characterized in that, After opening the solenoid control valve of the anchor box flushing circuit, it is also necessary to determine whether the solenoid control valve is open normally. If the result is that the solenoid control valve fails to open, the fault is reported and the automatic support process of the automatic anchor drilling machine is terminated; otherwise, the subsequent steps are performed.

5. The method for automatically cleaning the ejected anchor bolt torque nut damping body according to claim 1, characterized in that, Before opening the solenoid control valve of the anchor box flushing circuit, it is also necessary to determine whether there is flushing fluid. If the result is no flushing fluid, a fault is reported and the automatic support process of the automatic anchor drilling rig is terminated. If the result is that there is flushing fluid, the solenoid control valve of the anchor box flushing circuit is opened.

6. The method for automatically cleaning the ejected anchor bolt torque nut damping body according to claim 1, characterized in that, Step S103 also includes a step of determining whether the damping body has been cleaned: if the determination result is not completed, the operating pressure of the pressure valve is automatically increased.

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