Self-variable-pressure abrasive jet cleaning device, system and method

Abstract

The invention relates to a self-variable-pressure abrasive jet cleaning device, system and method. The device comprises a vehicle body, a jet system, a storage system and a control system. The jet system is arranged on the vehicle body and used for executing the task of removing slag accumulated at the bottom of the hard rock jacking pipe. The material storage system is connected with the jet flow system and is used for providing material grinding water required by slag removal; and the control system is electrically connected with the storage system and the jet system, and is used for receiving monitoring data of slag removal by the storage system and abrasive water production by the jet system, and sending out a control instruction. According to the device, the method that a jet system, a control system and other systems in the self-variable-pressure abrasive jet device are matched with one another is adopted, the pumping pressure and the abrasive ratio are automatically adjusted according to the amount of accumulated slag at the bottom of the pipe, the shield blocking accident caused by accumulation of the accumulated slag is effectively avoided, the water consumption for flushing the slag is effectively saved, and waste of engineering resources is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of anti-stuck shield in hard rock pipe jacking construction, and in particular relates to a self-variable pressure abrasive jet cleaning device, system and method. Background Art

[0002] During the construction of hard rock pipe jacking, the problem of slag accumulation at the bottom of the pipe will not only lead to a significant increase in the resistance of the pipe jacking, but may also cause a jamming phenomenon, resulting in a significant decrease in construction efficiency. This phenomenon is mainly due to the fact that during the construction process, under the combined effects of factors such as vibration generated by the machine head during operation and gravity, the rock slag produced by the cutting of the pipe jacking machine and the crushed stone in the broken zone will gather in the gap between the pipe wall and the rock during the jacking process. Since the crushed stone has an irregular shape and great strength, when the crushed stone gathers to a certain extent, the pipe wall will be squeezed by external forces, resulting in jamming or abnormal increase in friction.

[0003] Most of the current technical means use the circulating water system of the pipe jacking machine to solve the problem, that is, by closing the outlet pipe to increase the water inlet pressure, which will increase the water pressure in the cutter head compartment, and then generate pressure water flow to drive the slag at the bottom of the pipe to move. When the slag moves to the next slag discharge port, it is cleared manually at the slag discharge port. However, this method has the disadvantages of high water consumption, poor targeting, insufficient water flow momentum, and a large number of manual labor. In many cases, the pressure generated is not enough to drive the slag to move, and there is even the possibility of secondary blockage. Therefore, this method is not ideal, and a new method for cleaning the slag at the bottom of the pipe is urgently needed. Summary of the invention

[0004] In order to overcome the problems existing in the prior art, the present invention provides a self-variable pressure abrasive jet cleaning device, system and method.

[0005] A self-variable pressure abrasive jet cleaning device, comprising a vehicle body, a jet system, a material storage system and a control system;

[0006] The jet system is arranged on the vehicle body and is used to perform the task of clearing the slag accumulated at the bottom of the hard rock top pipe;

[0007] The material storage system is connected to the jet system and is used to provide abrasive water required for slag removal;

[0008] The control system is electrically connected to the material storage system and the jet system, and is used to receive monitoring data of the material storage system performing slag removal and the jet system producing abrasive water, and issue control instructions.

[0009] According to the aspects described above and any possible implementation, an implementation is further provided, which also includes a travel system arranged at the bottom of the vehicle body, and the travel system is used to achieve smooth travel and precise positioning of the device in the hard rock top pipe section.

[0010] According to the aspects described above and any possible implementation methods, an implementation method is further provided, wherein the jet system includes a high-pressure pump head, a motor 1, two sections of high-strength hose, a reel and a high-pressure nozzle, wherein the motor 1 and the high-pressure pump head are combined and fixed at the bottom of the vehicle body, the water outlet of the high-pressure pump head is connected to the inlet of the first section of high-strength hose, the outlet of the high-strength hose is connected to the inlet of the internal channel of the reel, the outlet of the internal channel is connected to the inlet of the second section of high-strength hose, and the outlet end of the high-strength hose is connected to the high-pressure nozzle.

[0011] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein the material storage system includes an abrasive bin, a delivery pump, a water storage bin and a water pump, the abrasive bin and the water storage bin are connected via the delivery pump, the water pump and the water storage bin are connected via a plastic hard pipe, and the water inlet of the high-pressure pump head is connected to the water storage bin.

[0012] According to the aspects described above and any possible implementation method, an implementation method is further provided, which also includes a monitoring system connected to the control system, the monitoring system includes a speed detection device arranged on the side of the reel, a pressure monitoring device arranged at the high-pressure pump head, an abrasive monitoring device arranged inside the abrasive bin, a water volume monitoring device arranged inside the water storage bin, and a voltage monitoring device integrated in the control system.

[0013] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein the control system includes a display screen, a control console, a processor, an electric control transformer and a second motor, wherein the display screen is arranged on the control console, the processor is arranged inside the control console, and the electric control transformer and the second motor are electrically connected to the processor.

[0014] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein the high-pressure nozzle is a variable-angle wing-type nozzle, and when the high-pressure nozzle moves forward, the maximum spray angle is 15°, and when the high-pressure nozzle retracts and spreads its wings, the maximum spray angle is 45°.

[0015] The present invention also provides a self-variable pressure abrasive jet cleaning system, which comprises a slag cutting ring plate and the device.

[0016] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein the slag cutting ring plate includes a handle, a side plate and a bottom plate, wherein the side plate is arranged on the bottom plate, the handle is arranged on the side plate, the length of the handle is 50 cm, and the thickness of the side plate is 0.3 cm.

[0017] The present invention also provides a method for removing slag from the bottom of a hard rock top pipe by using a self-variable pressure abrasive water jet device. The method is implemented by using the system and is used to remove slag from the bottom of a top pipe. The method comprises: step 1: in a preparation stage, the device is transported to the work site, and after inspection, the device is placed in the top pipe and moved to the slag discharge port of the pipe, and a slag cutting ring plate is placed in the slag discharge port for debugging;

[0018] Step 2. Start the abrasive bin, the delivery pump, the water storage bin and the water pump in the storage system of the device to mix the abrasive and water to prepare abrasive water;

[0019] Step 3. Start the high-pressure pump head and motor 1 in the jet system of the device. The high-pressure nozzle sprays forward under the reaction force of the abrasive water jet, and rakes the accumulated slag in the bottom of the pipe below the slag discharge port back to the slag cutting ring plate. When the slag is full, lift the slag cutting ring plate for cleaning;

[0020] Step 4. After completing the slag cleaning task, lift the slag cutting ring plate, close the slag cleaning port, turn off the jet system and the material storage system, and remove the device from the pipeline.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The self-variable pressure abrasive jet cleaning device of the present invention comprises a vehicle body, a jet system, a storage system and a control system; the jet system is arranged on the vehicle body and is used to perform the task of cleaning the slag accumulated at the bottom of the hard rock top pipe; the storage system is connected to the jet system and is used to provide the abrasive water required for cleaning the slag; the control system is electrically connected to the storage system and the jet system and is used to receive the monitoring data of the storage system cleaning the slag and the jet system making the abrasive water and to issue control instructions. The beneficial effects of the present invention are:

[0023] (1) The present invention aims to solve the problem of poor cleaning effect of accumulated slag at the bottom of hard rock top pipes by using a method of mutual coordination of the jet system, control system and other systems in a self-variable pressure abrasive jet device to automatically adjust the pumping pressure and abrasive ratio according to the amount of accumulated slag at the bottom of the pipe, thereby effectively avoiding shielding accidents caused by accumulated slag, effectively saving water for flushing slag, and reducing waste of engineering resources.

[0024] (2) The self-variable pressure abrasive jet device has the functions of self-adjusting the slag flushing pressure and the abrasive ratio, which can realize adaptive changes in different slag cleaning difficulties, significantly improve the removal rate of slag accumulation at the bottom of the pipe during hard rock pipe jacking construction, and provide favorable guarantees for the continuous construction of pipe jacking operations.

[0025] (3) Compared with the traditional circulating water system slag cleaning method, this device improves the automation level and safety of construction through intelligent control and mechanized slag cleaning, reduces dependence on manual operation, reduces labor intensity and safety risks, significantly improves construction efficiency, and effectively releases productivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the self-variable pressure abrasive jet device of the present invention.

[0027] Figure 2 This is the internal structure diagram of the speed monitoring.

[0028] Figure 3 This is a detailed picture of the water flow through the scroll.

[0029] Figure 4 It is a schematic diagram of the high-pressure nozzle structure.

[0030] Figure 5 It is a schematic diagram of the high-pressure nozzle retracting and raking slag.

[0031] Figure 6 It is the logical relationship diagram of the self-variable pressure jet.

[0032] Figure 7 It is a schematic diagram of the slag cutting ring plate structure.

[0033] Figure 8 It is a schematic diagram of the storage system.

[0034] Fig. 9 Schematic diagram of the structure of the tube bottom. DETAILED DESCRIPTION

[0035] In order to better understand the technical solution of the present invention, the content of the present invention includes but is not limited to the specific implementation methods described below, and similar technologies and methods should be considered to be within the scope of protection of the present invention. In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

[0036] It should be clear that the embodiments described in the present invention are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0038] The present invention provides a self-variable pressure abrasive jet cleaning device, comprising a vehicle body, a jet system, a material storage system and a control system;

[0039] The jet system is arranged on the vehicle body and is used to perform the task of clearing the slag accumulated at the bottom of the hard rock top pipe;

[0040] The material storage system is connected to the jet system and is used to provide abrasive water required for slag removal;

[0041] The control system is electrically connected to the material storage system and the jet system, and is used to receive monitoring data of the material storage system performing slag removal and the jet system producing abrasive water, and issue control instructions.

[0042] During the construction of hard rock jacking pipe, the pipe sections are pushed into the stratum one by one by using the jacking force, and each pipe section is welded into an integral pipe; the pipe bottom mentioned in the present invention refers to the bottom of the gap between the outer pipe wall of the pipe and the rock stratum of the stratum, where the debris is accumulated, forming the slag outside the pipe wall, which needs to be removed and discharged from the slag discharge port formed on the pipe, such as Fig. 9 shown.

[0043] Specifically, if Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a device for removing slag at the bottom of a hard rock top pipe by a self-variable pressure abrasive jet comprises: a vehicle body 2, a travel system, a jet system, a material storage system, a monitoring system, an alarm system and a control system;

[0044] Car body 2, which is the main structure of the device. Car body 2 is designed to be sturdy and durable, and can operate for a long time in muddy, wet and hot environments;

[0045] A traveling system, which is used to achieve smooth traveling and precise positioning of the device in the pipeline, and includes a directional wheel 3 and a guide wheel 4, and the traveling system is arranged at the bottom of the vehicle body 2;

[0046] The jet system receives the control system command, performs the slag cleaning task, and feeds back the rotation speed in real time. The jet system includes a high-pressure pump head 6, a motor 5, two sections of high-strength hose 7, a reel 8, and a high-pressure nozzle 9. In the jet system, the motor 5 and the high-pressure pump head 6 are combined and fixed on the bottom of the surface of the vehicle body 2. The water outlet of the high-pressure pump head 6 is connected to the inlet of the first section of the high-strength hose 7, and the water inlet of the high-pressure pump head 6 is connected to the water storage bin 12 of the storage system. The motor 5 is connected to the high-pressure pump head 6 through mechanical components. The motor 5 converts electrical energy into mechanical energy of the high-pressure pump head 6, so that the high-pressure pump head 6 can extract abrasive water from the water storage bin 12. The abrasive water jet under high pressure has great kinetic energy. When it contacts the accumulated slag at the bottom of the pipe, the kinetic energy of the abrasive water jet can decompose the gravel into smaller gravel slag, greatly reducing the difficulty of cleaning. The abrasive water is transported to the high-strength hose 7 after being pressurized. The outlet of the first section of the high-strength hose 7 with a certain length is connected to the inlet 805 of the internal channel of the reel 8. The turning point between the inlet 805 and the outlet 804 of the internal channel is provided with a movable interface 806. The movable interface 806 is fixedly integrated and sealedly connected to the internal channel on one side of the inlet 805. The movable interface 806 is rotatable to the internal channel connected to the outlet 804. The abrasive water flowing out of the outlet of the first section of the high-strength hose 7 enters through the inlet 805 of the reel 8, passes through the internal channel, and flows out from the outlet 804. The outlet 804 is connected to the inlet of the second section of the high-strength hose 7. The second section of the high-strength hose 7 is provided with a certain length, which is wound on the reel 8, and its outlet is connected to the high-pressure nozzle 9. Since the internal pipe where the outlet 804 is located is rotatable, it is not necessary to reel in the first section of the high-strength hose 7 while the second section of the high-strength hose 7 is being released, thereby reducing the demand for the length of the first section of the high-strength hose 7 and further reducing the pressure loss. The length of the first section of the high-strength hose 7 is fixed, and the recommended length is the straight-line distance from the water outlet of the high-pressure pump head 6 to the water inlet of the reel 8 + 30cm surplus. The length of the second section of the high-strength hose 7 can be set according to actual needs without specific limitations, but the pressure loss caused by the length should be considered.

[0047] The outlet end of the second section of high-strength hose 7 is connected to a high-pressure nozzle 9, which guides the abrasive jet together with the second section of high-strength hose 7. The insulating turntable 801 is fixed to the reel 8 with screws and can rotate with the reel 8. A number of induction magnetic sheets 802 are arranged on the turntable surface, and the fixed disk 803 is fixed to the vehicle body with screws.

[0048] The material storage system is used to store and mix the abrasive water required for the operation, including an abrasive bin 10, a delivery pump 11, a water storage bin 12, and a pumping pump 13. In the material storage system, the abrasive bin 10 can grind and store the abrasive. The abrasive bin 10 is connected to the water storage bin 12 through the delivery pump 11. The delivery pump 11 pumps the abrasive of sufficient fineness into the water storage bin 12. The water storage bin 12 can stir and store the abrasive water. The pumping pump 13 provides a water source for the water storage bin 12 and is connected to the water storage bin 12 with a plastic hard pipe 1303. The material storage system can timely adjust the abrasive water ratio according to the control system signal;

[0049] The monitoring system is used to receive feedback signals from various monitoring devices, including a speed monitoring component 16, a pressure monitoring component 14, an abrasive monitoring component 17, a water volume monitoring component 15 and a voltage monitoring component. The speed monitoring component 16 is arranged on the side of the reel 8 and is implemented by an electromagnetic sensor 1601. The electromagnetic sensor 1601 senses the rotation of the magnetic sheet 802 to generate different electrical signals to be transmitted to the control system, so that the injection speed and injection length of the high-pressure nozzle 9 can be monitored in real time. The pressure monitoring component 14 is arranged above the high-pressure pump head 6. The pressure monitoring component 14 is a combination of a pressure sensor and an instrument. The abrasive monitoring component 17 is arranged inside the abrasive bin 10 for real-time monitoring of the abrasive storage volume. The water volume monitoring component 15 is arranged inside the water storage bin 12 for real-time monitoring of the water storage volume. The abrasive monitoring component 17 and the water volume monitoring component 15 are both composed of a quality sensor and a liquid crystal display. The voltage monitoring component is integrated into the control system and is a voltage sensor for real-time display of the voltage status of the three-phase electricity. The above sensors can transmit signals to the control system processor 22 and display them on the display screen 18.

[0050] The alarm system is used to receive the monitoring system signal and warn the operator that the above-mentioned monitoring position is in an abnormal state. The alarm system includes a buzzer 23 and an alarm light 24. The buzzer 23 and the alarm light 24 are a combined structure and are jointly arranged on the side of the control system. When the processor 22 processes the monitoring system signal and determines that a system is in an abnormal state, it sends a signal to control the alarm system to work.

[0051] The control system is used to display, store and process all data collected by the monitoring system and feed it back to other systems. The control system includes a display screen 18, a control console 19, a processor 22, an electronically controlled transformer 21, and a motor 20. The display screen 18, the control console 19 and the processor 22 are integrated into a vehicle-mounted computer and fixed to the rear of the vehicle body by high-strength screws. The display screen 18 displays the processed monitoring data. The control console 19 can manually control the start and stop of each component. The processor 22 is used to store and calculate the monitoring data and can automatically give the next step instruction based on data analysis and machine learning algorithms. The electronically controlled transformer 21 is installed at one end of the high-pressure pump head 6, and controls the internal pressure regulating valve by receiving the electrical signal of the processor 22, thereby changing the pressure of the high-pressure pump head 6. The motor 20 is fixed next to the reel 8 at the top of the vehicle body 2. After receiving the reeling instruction from the control system, the motor 20 starts, and its shaft 2001 rotates, and the gear 1603 engaged with it rotates at the same time, finally realizing the reeling of the reel 8.

[0052] Furthermore, if Figure 4 and Figure 5 As shown, the high-pressure nozzle 9 is a variable-angle wing-type nozzle, including a spray wing 901, a forward spray hole, a backward spray hole, a slot 902, a buckle plate 903, a spring 1 904, and a spring 2 905. The forward spray hole ( Figure 4The rearward spray hole 901 is arranged at the front end of the high-pressure nozzle body, and the backward spray hole is arranged on the spray wing 901. Two backward spray holes with different spray angles are arranged on each spray wing 901. The rearward spray hole 1 906 has a larger angle, and the rearward spray hole 2 907 has a smaller angle. The angles of the two holes differ by about 5°. The tail of the buckle plate 903 is connected to the outlet end of the second section of the high-strength hose 7. The second spring 905 is located between the buckle plate 903 and the nozzle housing. The front end of the buckle plate 903 is stuck in the slot 902 to limit the spray angle of the spray wing 901. The spring 1 904 is located in a groove pre-set in the high-pressure nozzle body and contacts with the spray wing 901. The two moving states of the high-pressure nozzle 9, forward and backward, correspond to two different spraying states. When the high-pressure nozzle 9 moves forward, the buckle plate 903 is located in the card slot 902, limiting the ejection of the spray wing 901. At this time, the spring 1 904 is in a compressed state. At this time, the elastic force of the spring 1 904 and the restraining force of the buckle plate 903 on the card slot 902 are a pair of balanced forces. The spring 1 904 accumulates elastic potential energy, and the spring 2 905 has almost no elastic potential energy. At this time, the spray angle of the backward spray hole 1 906 is 15°, and the spray angle of the backward spray hole 2 907 is 10°. This state ensures the rapid spraying of the high-pressure nozzle 9. When the control system issues a retraction command, the reel 8 rotates to pull the second section of the high-strength hose 7, and then pulls the buckle plate 903 to apply pressure to the spring 2 905. At this time, the spring 2 905 is compressed, and the spring 1 904 releases its elastic potential energy. The spray wing 901 unfolds. After unfolding, the rearward spray hole 1 906 has a spray angle of 45°, and the rearward spray hole 2 907 has a spray angle of about 40°. The rearward spray holes 1 906 and 907 work at the same time. The purpose of setting two spray holes is to increase the spray amount and the spray angle at the same time. This state ensures that the high-pressure nozzle has the maximum slag raking area, which is conducive to efficient slag cleaning.

[0053] Furthermore, the high-pressure pump head 6, high-strength hose 7 and high-pressure nozzle 9 of the jet system are made of wear-resistant materials to extend their service life.

[0054] Furthermore, an automatic stirring device is provided inside the water storage bin 12 of the material storage system, and the automatic stirring device stirs the abrasive to ensure that the abrasive is evenly distributed and prevent precipitation.

[0055] Furthermore, the device can automatically adjust the pumping pressure and abrasive ratio according to the amount of slag accumulated at the bottom of the pipe. Its working principle is: the monitoring system monitors the injection speed, injection length and other signals of the high-pressure nozzle 9 and transmits them to the processor 22 in the control system. The processor 22 determines the current slag cleaning difficulty and feeds back the adjustment signal to other systems. Then, the control system adjusts the slag cleaning pressure by controlling the electronically controlled transformer 21, and the storage system adjusts the abrasive-water ratio by controlling the delivery pump 11, the water pump 13, etc.

[0056] Furthermore, the display screen 18 of the control system adopts a touch screen design, which is convenient for operators to query and operate data.

[0057] Furthermore, the electric control transformer 21 of the control system has an overload protection function to ensure the safety of the device when working under high load.

[0058] As an embodiment disclosed in the present invention, the present invention also provides a slag cleaning system, which includes the aforementioned device 1 of the present invention and a slag cutting ring plate 25, which are used together to perform slag cleaning, the slag cutting ring plate 25 is made of stainless steel, and is welded into a whole by a handle 2501, a side plate 2502 and a bottom plate 2503, wherein the side plate is arranged on the bottom plate, the handle is arranged on the side plate, the length of the handle is 50 cm, the thickness of the side plate is 0.3 cm, the thickness of the bottom plate is 0.1 cm, and a water filter hole is arranged on the bottom plate for filtering out the accumulated water on the bottom plate.

[0059] As an embodiment disclosed in the present invention, the present invention further provides a slag accumulation method, and the slag cleaning method is implemented by using the above-mentioned slag cleaning system of the present invention, comprising the following steps:

[0060] Step 1: In the preparation stage, the device is transported to the work site to ensure that the device and its internal systems (body, travel system, jet system, storage system, monitoring system, alarm system and control system) are intact; a preliminary inspection of the device is carried out to ensure that all components are firmly connected and the power and water supply are normal;

[0061] Step 2: Installation and debugging: Place the device in the pipeline, use the directional wheel and guide wheel to move the device to the slag discharge port of the pipeline, put in the slag cutting ring plate, start the control system, and conduct preliminary debugging to ensure that the monitoring system (speed monitoring, pressure monitoring, abrasive monitoring, water volume monitoring, voltage monitoring) works normally;

[0062] Step 3: Abrasive water preparation: start the abrasive bin 10, the delivery pump 11, the water storage bin 12 and the pumping pump 13 in the storage system, mix the abrasive with water to prepare abrasive water, and ensure that the abrasive water is stirred evenly and the storage volume in the water storage bin is sufficient;

[0063] Step 4: Start the high-pressure pump head 6 and the motor 1 5 in the jet system. The motor 1 provides power for the high-pressure pump head 6, sucks out the abrasive water from the water outlet of the water storage tank 12, pressurizes it into the first section of the high-strength hose 7 through the high-pressure pump head 6, and then enters the internal channel from the inlet 805 of the reel 8, and enters the second section of the high-strength hose 7 wound on the reel 8 from the outlet 804 of the internal channel. Then the abrasive water is sprayed out from the spray hole of the high-pressure nozzle 9. The high-pressure nozzle 9 drives the second section of the high-strength hose 7 to spray forward under the reaction force of the abrasive jet. The second section of the high-strength hose 7 is It is coiled on the reel 8, so the reel 8 starts to rotate. Since the length of the second section of the high-strength hose 7 is expanded, the high-pressure nozzle 9 connected to its outlet end enters the formation from the slag discharge port. After the high-pressure nozzle 9 enters the formation from the slag discharge port, the abrasive water sprayed by it is used to rake back the accumulated slag at the bottom of the pipe. At this time, the accumulated slag at the bottom of the pipe moves laterally under the spray of abrasive water, just like a broom, and the slag cutting ring plate 25 is placed at the slag discharge port to collect the raked back accumulated slag. When the slag cutting ring plate 25 is full of slag, it is lifted out of the slag discharge port for cleaning to ensure smooth slag cleaning. In the above working process, as the reel 8 rotates, the magnetic sheet 802 on the insulating turntable 801 starts to rotate, and the electromagnetic sensor 1601 starts to generate signals and transmits them to the control system. The mass sensors at the bottom of the abrasive bin 10 and the water storage bin 12, and the pressure sensor on the high-pressure pump head 6 also transmit the generated signals to the control system. The control system calculates and adjusts the pump pressure in the high-pressure pump head 6 in real time according to the data transmitted by these sensors, and controls the motor 20 to rotate the reel to pull back the high-pressure nozzle 9, and the spray wings 901 of the high-pressure nozzle 9 are unfolded to carry out the raking back of the accumulated slag cleaning work;

[0064] Step 5: Monitoring and alarm. During the slag cleaning process, the monitoring system continuously monitors the various parameters collected and transmitted by the electromagnetic sensor 1601, the quality sensor, and the pressure sensor. The alarm system receives the monitoring system signal. If an abnormal situation occurs, an alarm signal is issued through the alarm light and buzzer to remind the operator to deal with it in time.

[0065] Step 6: Finishing work, after completing the slag removal task, raise the slag cutting ring plate 25, close the slag discharge port, turn off the jet system and the material storage system, and smoothly move the device out of the pipeline. Perform equipment inspection and maintenance to ensure that the device is in good condition for next use.

[0066] Furthermore, when the jet system is operating in step 4, the second section of the high-strength hose 7 extends into the bottom of the pipe through the slag discharge port, and the angle between the second section of the high-strength hose 7 and the bottom axis of the pipeline is in the range of 30° to 60°, so that the friction resistance between the second section of the high-strength hose 7 and the slag cleaning port wall is minimized. If the friction resistance here is too large, the rotation speed of the reel 8 will be slowed down, causing the processor of the control system to misjudge the difficulty of slag cleaning.

[0067] Preferably, if Figure 2As shown, the electromagnetic sensor 1601 in the monitoring system realizes rotation speed monitoring according to the rotation of the magnetic sheet 802, and the insulating turntable 801 and the insulating partition 1602 ensure the accuracy of the electromagnetic signal.

[0068] The motor 20 in the control system converts electrical energy into mechanical energy, controls the rotation of its shaft 2001, and the matching gear 1603 rotates synchronously with the shaft 2001, and the gear 1603 is connected to the insulating turntable 801, thereby finally realizing the reverse rotation of the reel 8 and achieving the purpose of retracting the high-pressure nozzle 9.

[0069] Preferably, if Figure 3 As shown, the high-strength hose 7 connects the water flow to the water inlet 805 on the fixed plate 803, and the water flows through the internal passage to the water outlet 804. There is a movable interface 806 in between, and the movable interface 806 ensures that there is no need for an extra high-strength hose 7 when the reel rotates in any case.

[0070] Preferably, if Figure 6 As shown, the cooperation logic between the control system and the jet system is as follows: the control panel 19 controls the motor 5 to start, the abrasive water enters the high-pressure pump head 6 from the water storage tank 12, flows into the high-strength hose 7 after being pressurized, and then is sprayed out from the high-pressure nozzle 9, thereby driving the reel 8 to pay out the line. The reel 8 paying out the line is the rotation speed, and the reel 8 rotation speed is converted into a signal and transmitted to the processor 22. The processor 22 projects the signal to the display screen 18, and determines based on this signal to transmit instructions to the electronically controlled transformer 21, so that the electronically controlled transformer 21 controls the motor 5 to increase or decrease the pressure. At the same time, the processor 22 controls the motor 20 to make the reel 8 rotate in the opposite direction and retract the high-pressure nozzle 9. The high-pressure nozzle 9 rakes the accumulated slag back to the slag cutting ring plate 25 until the processor 22 program determines that it is finished or it is manually stopped at the control panel 19, that is, the work is finished.

[0071] Preferably, if Figure 8 As shown, the abrasive bin 10 is fixed to the bottom plate of the vehicle body 2 with the first high-strength bolt 1002, and the water storage bin 12 is fixed to the bottom plate of the vehicle body 2 with the second high-strength bolt 1203. The storage system stores abrasives and water before working. The abrasives are put in at the feeding port 1001, ground into fine particles internally, and pumped into the water storage bin 12 by the delivery pump 11 through the delivery pipe 1102. The delivery pump 11 and the abrasive bin 10 are separated by a sealing plug 1101. Water is drawn in from the water inlet 1301 of the water pump, and enters the water storage bin 12 from the water outlet 1302 through the plastic hard pipe 1303. There is an exhaust hole 1201 on the top of the water storage bin for balancing the air pressure in the bin. There is an automatic stirring device inside the water storage bin 12 to start stirring the abrasive and water when necessary to ensure that the abrasive is evenly distributed and prevent precipitation. The abrasive water with uniform texture enters the high-pressure pump head 6 in the jet system from the water outlet 1202 to start working.

[0072] In summary, the present invention can select the most suitable water pressure for slag with different cleaning difficulties through the mutual cooperation of the jet system, control system and other systems in the self-variable pressure abrasive jet device, which not only effectively reduces the waste of water resources, but also avoids the limitation of poor slag cleaning effect caused by insufficient water flow momentum in traditional slag cleaning methods. The use of the self-variable pressure abrasive jet device can significantly improve the slag removal rate at the bottom of the pipe in hard rock pipe jacking construction. After improving the slag removal rate, it also prevents the re-deposition of gravel to form secondary blockage, ensuring the continuity and smooth progress of the pipe jacking construction. Compared with the traditional circulating water system, the device improves the automation level and safety of construction through intelligent control and mechanized slag cleaning, reduces dependence on manual operation, reduces labor intensity and safety risks, and significantly improves construction efficiency.

[0073] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not depart from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A self-variable pressure abrasive jet cleaning device, characterized in that: It includes the vehicle body, fluidic system, storage system and control system; The jet system is arranged on the vehicle body and is used to perform the task of clearing the slag accumulated at the bottom of the hard rock top pipe; The material storage system is connected to the jet system and is used to provide abrasive water required for slag removal; The control system is electrically connected to the material storage system and the jet system, and is used to receive monitoring data of the material storage system performing slag removal and the jet system producing abrasive water, and issue control instructions.

2. The device according to claim 1, characterized in that It also includes a traveling system arranged at the bottom of the vehicle body, and the traveling system is used to achieve smooth travel and precise positioning of the device in the hard rock jacking pipeline.

3. The device according to claim 1 or 2, characterized in that: The jet system includes a high-pressure pump head, a motor, two sections of high-strength hose, a reel and a high-pressure nozzle. The motor and the high-pressure pump head are combined and fixed at the bottom of the vehicle body. The water outlet of the high-pressure pump head is connected to the inlet of the first section of the high-strength hose, the outlet of the high-strength hose is connected to the inlet of the internal channel of the reel, the outlet of the internal channel is connected to the inlet of the second section of the high-strength hose, and the outlet end of the high-strength hose is connected to the high-pressure nozzle.

4. The device according to claim 3, characterized in that The material storage system includes an abrasive bin, a delivery pump, a water storage bin and a water pump. The abrasive bin and the water storage bin are connected through the delivery pump, the water pump and the water storage bin are connected through a plastic hard pipe, and the water inlet of the high-pressure pump head is connected to the water storage bin.

5. The device according to claim 4, characterized in that It also includes a monitoring system connected to the control system, which includes a speed monitoring component arranged on the side of the reel, a pressure monitoring component arranged at the high-pressure pump head, an abrasive monitoring component arranged inside the abrasive bin, a water volume monitoring component arranged inside the water storage bin, and a voltage monitoring component integrated in the control system.

6. The device according to claim 3, characterized in that The control system includes a display screen, a control console, a processor, an electric control transformer and a second motor. The display screen is arranged on the control console, the processor is arranged inside the control console, and the electric control transformer and the second motor are electrically connected to the processor.

7. The device according to claim 3, characterized in that The high-pressure nozzle is a variable-angle wing-type nozzle. When the high-pressure nozzle moves forward, the maximum spray angle is 15°, and when the high-pressure nozzle retracts, the maximum spray angle is 45°.

8. A self-variable pressure abrasive jet cleaning system, characterized in that: The system comprises a slag cutting ring plate and the device according to any one of claims 1-7.

9. The system according to claim 8, characterized in that The slag cutting ring plate includes a handle, a side plate and a bottom plate, wherein the side plate is arranged on the bottom plate, the handle is arranged on the side plate, the length of the handle is 50 cm, and the thickness of the side plate is 0.3 cm.

10. A method for removing slag from a variable pressure abrasive water jet device, the method being implemented by the system according to any one of claims 8 to 9, for removing slag accumulated at the bottom of a hard rock top pipe, characterized in that: It includes: Step 1: in the preparation stage, the device is transported to the work site, and after inspection, the device is placed in the top pipe and moved to the slag discharge port of the pipe, and a slag cutting ring plate is placed in the slag discharge port for debugging; Step 2. Start the abrasive bin, the delivery pump, the water storage bin and the water pump in the storage system of the device to mix the abrasive and water to prepare abrasive water; Step 3. Start the high-pressure pump head and motor 1 in the jet system of the device. The high-pressure nozzle sprays forward under the reaction force of the abrasive water jet, and rakes the accumulated slag in the bottom of the pipe below the slag discharge port back to the slag cutting ring plate. When the slag is full, lift the slag cutting ring plate for cleaning; Step 4. After completing the slag cleaning task, lift the slag cutting ring plate, close the slag cleaning port, turn off the jet system and the material storage system, and remove the device from the pipeline.

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