Water jet cutter device based on heading machine

Abstract

A water jet device based on a heading machine belongs to the technical field of water jet equipment and comprises a water jet equipment body, a hydraulic rotary motor, a water pressurizing mechanism, a pressure sensor, a pressure reducing valve, an electromagnetic valve and an alarm circuit. The water pressurizing mechanism comprises a volute and an impeller, the water jet cutter equipment body and the water pressurizing mechanism, the pressure reducing valve is mounted on a machine body of the heading machine body, a liquid outlet pipe of a hydraulic pump system of the heading machine is connected with a liquid inlet pipe of the pressure reducing valve, a liquid outlet pipe of the pressure reducing valve is connected with one end of the electromagnetic valve, and the other end of the electromagnetic valve is connected with a liquid inlet end of the hydraulic rotating motor; the liquid outlet end of the hydraulic rotary motor is connected with a liquid return pipe of the hydraulic pump system; a water inlet pipe of the volute is connected with a water outlet pipe of a water tank of the heading machine, a water outlet pipe of the volute is connected with a sand tank water inlet end of the water jet equipment body, the upper end of the water outlet pipe of the volute is connected with an inlet of the pressure sensor, and the alarm circuit is installed in the element box. The device is compact in structure, does not need a power supply line to supply power, and brings convenience to actual use.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting equipment, in particular to a water jet device based on a tunneling machine. Background Art

[0002] Waterjet equipment, also known as high-pressure water jet cutting equipment, is highly favored for its cold-cutting method, which does not alter the physical and chemical properties of the material. Through continuous technological improvements, abrasives such as pomegranate sand and corundum have been mixed into the high-pressure water to assist in cutting, greatly increasing the cutting speed and thickness of waterjets. Waterjets are now widely used in numerous manufacturing industries, including ceramics, stone, glass, metal, and composite materials. A waterjet generally consists of a sand tank, a pressurizing device (a high-pressure water pump), and a cutter head. The sand tank is pre-loaded with abrasive. During operation, the pressurizing device pumps pressurized water into the water inlet of the sand tank. The high-pressure water carries the abrasive material from the sand tank through a valve into a pipe connected to the cutter head. The water and abrasive mixture is then ejected from the front of the cutter head at high speed to cut the surface of the object. A roadheader (TBM) is a machine used to excavate tunnels on flat ground. Depending on the target, TBMs can be categorized as standard machines and tunnel boring machines (TBMs). Depending on the operating method, they can be divided into open-type TBMs and shield-type TBMs. A TBM primarily consists of a traveling mechanism, a working mechanism, a loading mechanism, and a transfer mechanism. The traveling mechanism propels the machine forward, while the cutting head in the working mechanism continuously crushes and transports the rock. TBMs are widely used in construction due to their safety, efficiency, and high-quality tunneling.

[0003] When using equipment such as tunnel boring machines during actual construction, and encountering metal foreign objects beneath the ground, due to the high hardness of the metal foreign objects, in order to prevent damage to the tunnel boring head, the general existing construction method is to use water jet equipment to cut the metal foreign objects (water jet cutting reduces the sparks generated by oxygen cutting and the chance of combustible gas explosion when combustible gas is present on site). In the above method, when the construction site does not have a power supply line, it is necessary to equip the water jet equipment with a generator to power it. In addition, the water jet equipment and the tunnel boring machine are in a split structure, which will cause actual inconvenience. In summary, it is particularly necessary to provide a water jet equipment that can be used in conjunction with a tunnel boring machine and does not require a power supply line. Utility Model Content

[0004] In order to overcome the disadvantages of the existing tunnel boring machine in conjunction with water jet equipment due to structural and functional limitations as described in the background technology, the present invention provides a method for installing a water jet equipment on a tunnel boring machine for use, wherein the water entering the sand tank of the water jet equipment is pressurized by the hydraulic pump system of the tunnel boring machine, and then the cutter head of the water jet equipment outputs a pressurized water-sand mixture to cut metal objects. Since the water jet equipment and the tunnel boring machine are installed together and have a compact structure, no power supply line is required, which brings convenience to actual use. A water jet device based on a tunnel boring machine.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A water jet device based on a tunnel boring machine includes a water jet device body, a hydraulic rotary motor, a water pressurizing mechanism, a pressure sensor, a pressure reducing valve, a solenoid valve, and an alarm circuit; the water pressurizing mechanism includes a volute and an impeller, the upper end and the side end of the volute are fixedly installed with a water inlet pipe and a water outlet pipe, the hydraulic rotary motor and the water pressurizing mechanism are fixedly installed on a fixed seat, and the side end of the volute is provided with a bearing; a shaft is fixedly installed in the bearing, the impeller is fixedly installed on one side end of the shaft and is located in the volute, and the rotating shaft of the hydraulic rotary motor and the other side end of the shaft are fixedly installed together; the water jet device body and the water pressurizing mechanism are installed on the fuselage of the tunnel boring machine body On the top, the liquid outlet pipe of the hydraulic pump system of the tunnel boring machine is fixedly connected to the liquid inlet pipe of the pressure reducing valve, the liquid outlet pipe of the pressure reducing valve is fixedly connected to one end of the solenoid valve, the other end of the solenoid valve is fixedly connected to the liquid inlet end of the hydraulic rotary motor, and the liquid outlet end of the hydraulic rotary motor is fixedly connected to the return pipe of the hydraulic pump system; the water inlet pipe of the volute is fixedly connected to the water tank outlet pipe of the tunnel boring machine, the water outlet pipe of the volute is fixedly connected to the water inlet end of the sand tank of the water jet equipment body, and the water outlet end of the sand tank is fixedly connected to the cutter head pipe of the water jet equipment; the upper end of the water outlet pipe of the volute is fixedly connected to the inlet of the pressure sensor, the alarm circuit is installed in the component box, and the component box is installed in the cockpit.

[0007] Furthermore, the solenoid valve is a normally closed valve core solenoid valve.

[0008] Furthermore, a sealing ring is installed between the inner and outer rings of the bearing.

[0009] Furthermore, the alarm circuit includes an electrically connected resistor and relay, a transistor, and an alarm, the positive power input terminal of the relay is connected to the control power input terminal, one end of the resistor is connected to the base of the transistor, the collector of the transistor is connected to the negative power input terminal of the relay, the emitter of the transistor is connected to the negative power input terminal of the alarm, and the normally closed contact terminal of the relay is connected to the positive power input terminal of the alarm.

[0010] Furthermore, the signal output terminal of the pressure sensor is electrically connected to the signal input terminal of the alarm circuit.

[0011] Furthermore, the hydraulic rotary motor and water pressurizing mechanism can also be replaced by the double plunger pump and hydraulically driven booster water pump on the tunnel boring machine. The high-pressure oil outlet of the double plunger pump is fixedly connected to the oil inlet of the hydraulically driven booster water pump, the oil outlet of the hydraulically driven booster water pump is fixedly connected to the return pipe of the hydraulic pump system, the water outlet pipe of the hydraulically driven booster water pump is fixedly connected to the water inlet end of the sand tank of the water jet equipment body, and the water outlet end of the sand tank is fixedly connected to the cutter head pipe of the water jet equipment.

[0012] Compared with existing technologies, the present invention offers the following advantages: The present invention utilizes a water jet device mounted on a roadheader. The hydraulic pump system of the roadheader drives a water pressurizing mechanism to pressurize the water entering the water jet device's sand tank. The water jet's cutter head then delivers a pressurized water-sand mixture to cut metal objects. Because the water jet device and roadheader are mounted together, the structure is compact and no power supply circuit is required, making practical use more convenient. In summary, the present invention has promising application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 It is a schematic diagram of the planar structure between the utility model and the pressure system of the tunnel boring machine.

[0015] Figure 2 It is a partial structural diagram of the utility model.

[0016] Figure 3 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0017] Figure 1 、 2As shown in , 3, a water jet device based on a tunnel boring machine includes a water jet device body 1, a hydraulic rotary motor 2, a water pressurizing mechanism, power switches S1 and S2, a pressure sensor A, a pressure reducing valve 3, an electromagnetic valve DC, and an alarm circuit 4; the water pressurizing mechanism includes a volute 51 and an impeller 52, and a water outlet pipe 54 and a water inlet pipe 53 that are interconnected with the interior of the volute 51 are welded to the middle of the upper end and the middle of the left end respectively, the lower ends of the hydraulic rotary motor 2 and the water pressurizing mechanism are fixedly mounted on a fixing seat 55, and the middle of the right end of the volute There is an axial hole in the shaft, and a bearing 56 is tightly sealed in the shaft hole; a shaft 57 is tightly sealed in the bearing 56, and the impeller 52 is fixedly mounted on the left outer end of the shaft 57 and is located in the volute 51. The rotating shaft of the hydraulic rotary motor 2 and the right end of the shaft 57 are fixed together with bolts through a flange; the water jet equipment body 1 and the water pressurizing mechanism, the pressure reducing valve 3, etc. are installed on the body of the tunnel boring machine, and the outlet pipe of the hydraulic pump system 6 of the tunnel boring machine and the inlet pipe of the pressure reducing valve 3 are connected in parallel through the first high-pressure pipeline, and the outlet of the pressure reducing valve 3 The pipe is connected to one end of the solenoid valve DC through a thread, the other end of the solenoid valve DC is connected to the liquid inlet end of the hydraulic rotary motor 2 through a second high-pressure pipe in parallel, and the liquid outlet end of the hydraulic rotary motor 2 and the return pipe of the hydraulic pump system 6 are connected in parallel through a third high-pressure pipe; the water inlet pipe 53 of the volute 51 is connected to the lower end of the water outlet pipe of the water tank of the tunnel boring machine through a pipe, the water outlet pipe 54 of the volute is connected to the water inlet end of the sand tank 101 of the water jet equipment body 1 through a fourth high-pressure pipe, and the water outlet end of the sand tank 101 is connected to the cutter head 102 pipe of the water jet equipment through a high-pressure hose; A branch pipe is welded to the upper end of the volute's outlet pipe, connecting to the interior. The inlet of pressure sensor A is connected to the branch pipe via a pipe. Power switches S1 and S2, along with alarm circuit 4, are housed in component box 7, which is installed in the tunnel boring machine's cab. The two poles of the tunnel boring machine's battery G1 are connected in series via power switch S1 to power input terminals 1 and 2 of pressure sensor A, the alarm circuit's power input terminal, the positive power input terminal of relay J1, the emitter of transistor Q1, and the power input terminal of a second power switch S2, respectively, via wires. The power output terminal of the second power switch S2 is also connected to the negative terminal of battery G1 and the power input terminal of the solenoid valve DC via wires.

[0018] Figure 1 、 2As shown in Figure 3, solenoid valve DC is a normally closed valve core solenoid valve (2W). A sealing ring 561 is installed on each side between the inner and outer rings of bearing 56 (to prevent water from escaping the volute). The alarm circuit includes resistor R1, relay J1, transistor Q1, and alarm B, connected via circuit board wiring. The positive power input of relay J1 is connected to the control power input. One end of resistor R1 is connected to the base of transistor Q1, the collector of transistor Q1 is connected to the negative power input of relay J1, the emitter of transistor Q1 is connected to the negative power input of alarm B, and the normally closed contact of relay J1 is connected to the positive power input of alarm B. Signal output pin 3 of pressure sensor A is connected to the other end of resistor R1, the signal input of the alarm circuit. The hydraulic rotary motor and water pressurizing mechanism can also be replaced by the double plunger pump and hydraulically driven booster water pump on the tunnel boring machine. The high-pressure oil outlet of the double plunger pump is fixedly connected to the oil inlet of the hydraulically driven booster water pump, the oil outlet of the hydraulically driven booster water pump is fixedly connected to the return pipe of the hydraulic pump system, the water outlet pipe of the hydraulically driven booster water pump is fixedly connected to the water inlet end of the sand tank of the water jet equipment body, and the water outlet end of the sand tank is fixedly connected to the cutter head pipe of the water jet equipment.

[0019] Figure 1 、 2As shown in Figures 3 and 4, the present invention utilizes a waterjet device 1 mounted on a roadheader. Because the waterjet device and roadheader are integrated, the structure is compact and requires no power supply circuitry, making it convenient for practical use. When the waterjet device 1 is in operation, a pressurizing device (the water pressurizing mechanism of the present invention) pressurizes water and pumps it into the water inlet of a sand tank 101. The high-pressure water carries the sand material discharged from the sand tank 101 through a valve into a pipe connected to a cutter head 102. The water and sand mixture is then ejected from the front end of the cutter head 102 at high speed, cutting the surface of the object. The waterjet device 1 described above represents established technology and will not be described in detail in this application. To use the waterjet device for cutting, a worker turns on power switches S1 and S2. Once the solenoid valve DC is energized and the valve core opens, the high-pressure hydraulic oil output from the outlet pipe of the roadheader's hydraulic pump system 6 is reduced in pressure by the pressure reducing valve 3 and enters the inlet of the hydraulic motor 2. The oil then flows back from the outlet of the hydraulic rotary motor 2 into the return pipe of the hydraulic pump system 6, where it is then recycled into the oil pump housing of the hydraulic pump system 6 for reuse. Hydraulic oil flows into and out of hydraulic rotary motor 2, whose shaft drives impeller 52 to rotate at high speed. The rotation of the impeller within the volute creates negative pressure, drawing water from the tunnel boring machine's water tank. This water is then pumped under pressure into the water inlet of sand tank 101. The high-pressure water then carries the sand, which has been discharged through the valve, into a pipe connected to cutter head 102. The water-sand mixture is then ejected from the front of cutter head 102 at high speed, cutting the surface. When solenoid valve DC is closed (power switch S2 is turned off), the outlet pipe of hydraulic rotary motor 2 no longer outputs high-pressure hydraulic oil, the impeller stops rotating, and the water jet stops operating. During actual cutting operations, when the water pressurizing mechanism works normally, the pressure sensor A detects that the water pressure in the outlet pipe of the volute is sufficient, and the voltage signal output by pin 3 of the pressure sensor A is relatively high. The voltage signal enters the base of the transistor Q1 after voltage reduction and current limiting by the resistor R1, and is higher than 0.7V. The collector of the transistor Q1 is turned on and the output low level enters the negative power input terminal of the relay J1. The relay J1 is energized and its control power input terminal and the normally closed contact terminal are open. The alarm B will not be energized and sound, indicating that the equipment can work normally. When the water pressurization mechanism is malfunctioning, pressure sensor A detects a relatively low water pressure in the volute's outlet pipe. Pin 3 of pressure sensor A outputs a relatively low voltage signal. This voltage signal is reduced and limited by resistor R1, reaching the base of transistor Q1 below 0.7V. Transistor Q1's collector is cut off, and no low-level signal is output to the negative power input of relay J1. Relay J1 loses power, no longer energizing its control power input and closing its normally closed contact. Alarm B is energized and sounds, indicating the equipment is malfunctioning (the water pressure in the volute's outlet pipe is sufficient). This allows for prompt maintenance by personnel when water pressure anomalies or malfunctions occur. Figure 3In the figure, resistor R1 has a resistance of 4.7K; transistor Q1 is 9013 (NPN); relay J1 is DC12V; alarm B is an FM24V active continuous sound alarm; pressure sensor A is an FK-P300 pressure transmitter, which has two power input terminals and one signal output terminal. The higher the detected pressure signal, the higher the output signal voltage, and vice versa; hydraulic rotary motor 2 is BMR-80; pressure reducing valve 3 is F-L20H4-S.

[0020] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that come within the meaning and range of equivalents of the claims be included in the present invention.

[0021] In addition, it should be understood that although this specification is described in terms of implementation methods, the implementation methods do not only include an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A water jet device based on a tunnel boring machine, comprising a water jet device body, a hydraulic rotary motor, a water pressurizing mechanism, a pressure sensor, a pressure reducing valve, and a solenoid valve, characterized in that: It also has an alarm circuit; the water pressurizing mechanism includes a volute and an impeller, the upper end and side end of the volute are fixedly installed with a water inlet pipe and a water outlet pipe, the hydraulic rotary motor and the water pressurizing mechanism are fixedly installed on the fixed seat, and the side end of the volute is provided with a bearing; a shaft is fixedly installed in the bearing, the impeller is fixedly installed on one side end of the shaft and is located in the volute, and the rotating shaft of the hydraulic rotary motor and the other side end of the shaft are fixedly installed together; the water jet equipment body and the water pressurizing mechanism are installed on the body of the tunnel boring machine, and the outlet pipe of the hydraulic pump system of the tunnel boring machine and the inlet pipe of the pressure reducing valve are fixed The liquid outlet pipe of the pressure reducing valve is fixedly connected to one end of the solenoid valve, the other end of the solenoid valve is fixedly connected to the liquid inlet end of the hydraulic rotary motor, and the liquid outlet end of the hydraulic rotary motor is fixedly connected to the return liquid pipe of the hydraulic pump system; the water inlet pipe of the volute is fixedly connected to the water tank outlet pipe of the tunneling machine, the water outlet pipe of the volute is fixedly connected to the water inlet end of the sand tank of the water jet equipment body, and the water outlet end of the sand tank is fixedly connected to the cutter head pipe of the water jet equipment; the upper end of the water outlet pipe of the volute is fixedly connected to the inlet of the pressure sensor, the alarm circuit is installed in the component box, and the component box is installed in the cockpit.

2. The water jet device based on a tunnel boring machine according to claim 1, characterized in that: A sealing ring is installed between the inner and outer rings of the bearing.

3. The water jet device based on a roadheader according to claim 1, characterized in that: The alarm circuit includes an electrically connected resistor and relay, a transistor, and an alarm. The positive power input terminal of the relay is connected to the control power input terminal, one end of the resistor is connected to the base of the transistor, the collector of the transistor is connected to the negative power input terminal of the relay, the emitter of the transistor is connected to the negative power input terminal of the alarm, and the normally closed contact terminal of the relay is connected to the positive power input terminal of the alarm.

4. The water jet device based on a roadheader according to claim 1, characterized in that: The signal output terminal of the pressure sensor is electrically connected to the signal input terminal of the alarm circuit.

5. The water jet device based on a roadheader according to claim 1, characterized in that: The solenoid valve is a normally closed spool solenoid valve.

6. The water jet device based on a roadheader according to claim 1, characterized in that: The hydraulic rotary motor and water pressurizing mechanism can also be replaced by the double plunger pump and hydraulically driven booster water pump on the tunnel boring machine. The high-pressure oil outlet of the double plunger pump is fixedly connected to the oil inlet of the hydraulically driven booster water pump, the oil outlet of the hydraulically driven booster water pump is fixedly connected to the return pipe of the hydraulic pump system, the water outlet pipe of the hydraulically driven booster water pump is fixedly connected to the water inlet end of the sand tank of the water jet equipment body, and the water outlet end of the sand tank is fixedly connected to the cutter head pipe of the water jet equipment.

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