Shield tunneling machine cutterhead abrasion critical value alarm system

Abstract

The utility model belongs to the technical field of shield tunneling machine cutterhead wear detection, and discloses a shield tunneling machine cutterhead wear critical value alarm system. The problem that an existing cutterhead abrasion alarm system adopting mechanical contact is low in contact sensitivity is solved. The device specifically comprises a signal reflection ring. The signal reflection ring is arranged in the cutter head, and the cutter head is installed on the cutter rest through the hob shaft. The knife rest is arranged on the shield tunneling machine; a signal receiving transmitter is arranged on one side, close to the cutterhead, of the tool rest; the surface of the signal reflection ring is wrapped with a signal shielding material. And the signal receiving transmitter is connected with the alarm system. When the cutter head is abraded to the position of the signal reflecting ring and the signal shielding material on the surface of the cutter head is abraded, the signal reflecting ring reflects a signal, and the signal receiving transmitter triggers the alarm system to give an alarm after receiving the reflected signal; abrasion alarm of the cutterhead is achieved through cooperation of the signal receiving transmitter and the signal reflecting ring, and the sensitivity of the alarm system is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machine cutter head wear detection, in particular to a shield machine cutter head wear critical value alarm system. Background Art

[0002] With the accelerated development of global urbanization, the urban population has gradually increased, and the demand for urban transportation, water supply, drainage and other infrastructure has also grown rapidly. The efficient and safe construction method of the shield machine has made it the preferred tool for underground transportation tunnel construction. It can meet the needs of urban underground space construction and provide support for urbanization. The shield machine cutterhead is a key component of the shield machine, responsible for cutting and crushing underground rock and soil. If the cutter is not replaced in time, it may cause a series of problems in the efficiency, safety and mechanical life of the shield construction. The cutting performance of the shield machine cutterhead depends on the condition of the cutter. If the cutter is excessively worn or loses its sharpness, the cutting efficiency will decrease. This will increase the resistance of the shield machine to advance underground, slowing down the advancement speed, thereby extending the construction period and increasing costs. At the same time, the cutter may crack, break or break during use. If it is not replaced in time, it may cause the cutter to break or fall off, posing a safety hazard. The broken cutter may cause equipment failure and even harm the staff and the surrounding environment. Long-term use of severely worn cutters will accelerate the wear and loss of the shield machine, which may shorten the life of the equipment. The life of mechanical equipment is closely related to normal maintenance and timely replacement of worn parts. Failure to replace the cutter in time may accelerate the wear of the shield machine and increase the cost of equipment maintenance and repair. Therefore, by real-time monitoring of the shield machine cutter head, issuing an alarm when the shield machine cutter head wear reaches a critical value and replacing the worn cutter head in time, this type of problem can be effectively solved.

[0003] A Chinese utility model patent with patent number CN220185117U discloses a cutterhead suitable for a large-diameter shield machine. The forecast system in the patent sends an alarm based on whether the cutterhead is in contact with a switch, thereby reminding the user to replace the cutterhead. Mechanical contact is not sensitive enough, and the cutterhead of the shield machine will often have some cutting objects attached to it. If the cutting objects are attached to the surface of the cutterhead, it will have a greater impact on the switch alarm. At the same time, since the switch and the cutterhead are in close contact at the beginning, if the attachment is firmly bonded, it will directly damage the contact switch and cause the entire alarm system to fail. Therefore, the alarm system in the patent has a low sensitivity. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a shield machine cutter head wear critical value alarm system to solve the problem of low contact sensitivity of the existing cutter head wear alarm system using mechanical contact.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A shield machine cutter head wear critical value alarm system comprises a signal reflection ring; the signal reflection ring is arranged in the cutter head, and the cutter head is installed on the cutter holder through a roller cutter shaft; the cutter holder is arranged on the shield machine; a signal receiving transmitter is arranged on the side of the cutter holder close to the cutter head; the surface of the signal reflection ring is wrapped with signal shielding material; the signal receiving transmitter is connected to the alarm system.

[0007] In this scheme, when the cutterhead of the shield machine works normally, the signal receiving transmitter sends a signal, and the signal shielding material on the surface of the signal reflecting ring shields the signal; when the cutterhead wears to the position of the signal reflecting ring and the signal shielding material on its surface is worn off, the signal reflecting ring reflects the signal, and the signal receiving transmitter receives the reflected signal and triggers the alarm system to sound an alarm; the cutterhead wear alarm is realized by the coordinated work of the signal receiving transmitter and the signal reflecting ring, thereby ensuring the sensitivity of the alarm system.

[0008] Furthermore, the signal reflection ring is arranged concentrically with the cutter disc, and the ring body of the signal reflection ring is located at a wear critical value position of the cutter disc.

[0009] In this solution, when the cutter disc is worn to the critical wear value, the signal reflection ring can reflect the signal, thereby triggering the alarm system to sound an alarm; the wear degree of the cutter disc is accurately judged and the alarm result is reliable.

[0010] Furthermore, a high-pressure cleaner is provided on one side of the tool holder close to the cutter disc; an input end of the high-pressure cleaner is connected to an external water supply device, and the external water supply device is provided on the shield machine.

[0011] In this solution, a high-pressure cleaner is used to flush the inside of the knife chamber to prevent the cutting material inside the knife chamber from interfering with the signal and causing false alarms in the alarm system.

[0012] Furthermore, a high temperature resistant coating is provided on the signal reflection ring, and the high temperature resistant coating is coated on the outer wall of the signal shielding material.

[0013] In this solution, the high temperature resistant coating can isolate the high temperature generated during the operation of the cutter disc, preventing the high temperature from damaging the signal shielding material, and further ensuring the accuracy and reliability of the alarm result.

[0014] Furthermore, the alarm system includes a controller and a buzzer, the signal receiving transmitter is connected to the controller, and the controller is connected to the buzzer.

[0015] Furthermore, the signal transmitter and receiver is an electromagnetic wave signal transmitter and receiver; the signal shielding material is any one of silver fiber, silver cloth or copper cloth.

[0016] Furthermore, the signal receiving and transmitting device is an ultrasonic signal receiving and transmitting device; and the signal shielding material is any one of polyethylene, graphene or aluminum.

[0017] The beneficial effects of the utility model are:

[0018] The shield machine cutter disc wear critical value alarm system provided by the utility model adopts a signal receiving transmitter, which reduces wear and tear and has a longer service life compared to the mechanical contact alarm method in the prior art; a high-pressure cleaner is used to flush the cutter disc to avoid interference with the signal caused by cutting objects inside the cutter chamber, and the alarm sensitivity is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a shield machine cutter head wear critical value alarm system of the utility model;

[0020] Figure 2 This is a schematic diagram of the partial cross-sectional structure of the cutter head of the utility model;

[0021] Figure 3 It is a schematic diagram of the structure of the signal reflection ring of the utility model.

[0022] Reference numerals:

[0023] 1. Signal receiving transmitter; 2. Signal reflection ring; 3. Cutter head; 4. High-pressure cleaner; 5. Hob shaft; 6. Cutter holder; 7. Buzzer; 8. External water supply equipment; 9. High temperature resistant coating; 10. Signal shielding material. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. The specific implementation of the utility model is described below to facilitate the understanding of the utility model by those skilled in the art, but it should be clear that the utility model is not limited to the scope of the specific implementation. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all inventions and creations conceived using the utility model are protected.

[0025] like Figure 1 As shown, this embodiment provides a shield machine cutter head wear critical value alarm system, which uses the principle of signal generation and reflection to detect whether the cutter head is worn to the critical value position, and the detection result is accurate and highly sensitive; it specifically includes:

[0026] Signal reflection ring 2, knife disc 3, knife holder 6, signal receiving transmitter 1 and high pressure washer 4;

[0027] Among them, the signal reflection ring 2 is arranged in the cutter disc 3, and the cutter disc 3 is installed on the tool holder 6 through the hob shaft 5; the tool holder 6 is arranged on the shield machine; the surface of the signal reflection ring 2 is wrapped with a signal shielding material 10; a signal receiving transmitter 1 is provided on the side of the tool holder 6 close to the cutter disc 3, and the signal receiving transmitter 1 is used to send and receive signals; the signal receiving transmitter 1 is connected to the alarm system; during operation, the cutter disc 3 is worn to the point that the signal shielding material 10 outside the signal reflection ring 2 is worn, so that the signal reflection ring 2 is exposed and reflects the signal, and the signal receiving transmitter 1 receives the reflected signal to trigger the clamping system to alarm, reminding to replace the cutter disc 3; a high-pressure cleaner 4 is also provided on the side of the tool holder 6 close to the cutter disc 3; the input end of the high-pressure cleaner 4 is connected to an external water supply device 8, and the external water supply device 8 is arranged on the shield machine; the high-pressure cleaner 4 can flush the inside of the cutter chamber to avoid interference with the signal caused by the cutting material filling inside the cutter chamber, so as to avoid causing false alarms of the alarm system.

[0028] like Figure 2 As shown, the signal reflection ring 2 is concentrically arranged with the cutter disc 3, and the ring body of the signal reflection ring 2 is located at the wear critical value position of the cutter disc 3; when the cutter disc 3 is worn to the wear critical value position, the signal reflection ring 2 can reflect the signal, thereby triggering the alarm system to sound an alarm; the wear degree of the cutter disc 3 is accurately judged, and the alarm result is reliable.

[0029] like Figure 3 As shown, the signal reflection ring 2 is also provided with a high temperature resistant coating 9, which is coated on the outer wall of the signal shielding material 10; the high temperature resistant coating 9 can isolate the high temperature generated by the cutter head 3 during operation, and prevent the high temperature from damaging the signal shielding material 10; further ensuring the accuracy and reliability of the alarm result.

[0030] The alarm system comprises a controller and a buzzer 7 , the signal receiving transmitter 1 is connected to the controller, and the controller is connected to the buzzer 7 .

[0031] As a preferred embodiment of the present invention, the controller is a CMS8H5101L single chip microcomputer; the buzzer 7 is a LZQ-3022A / K alarm.

[0032] As a preference of this embodiment, the signal transmitter-receiver 1 is an electromagnetic wave signal transmitter-receiver; the signal shielding material 10 is any one of silver fiber, silver cloth or copper cloth.

[0033] As a preferred embodiment of this embodiment, the signal transmitter 1 is an ultrasonic signal transmitter; the signal shielding material 10 is any one of polyethylene, graphene or aluminum; the ultrasonic signal transmitter is a KURT300-M18KB90-DPS ultrasonic sensor.

[0034] As a preference of this embodiment, the alarm system provided in this embodiment further comprises a lithium battery, which is arranged on the tool holder; the lithium battery is used to provide working power to various components of the alarm system.

[0035] The working principle of this embodiment:

[0036] When the cutter head 3 of the shield machine is working normally, the signal receiving transmitter 1 sends a signal, and the signal shielding material 10 shields the signal; when the cutter head 3 is worn to a critical value, the high temperature resistant coating 9 and the signal shielding material 10 on the outside of the signal reflection ring 2 are worn off first, and the signal is transmitted to the signal reflection ring 2, and the signal reflection ring 2 reflects it. After the signal receiving transmitter 1 receives the signal reflected by the signal reflection ring 2, it triggers the buzzer 7 connected to it to alarm and remind to change the cutter.

[0037] Those skilled in the art will appreciate that the embodiments herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations based on the technical inspiration disclosed in the present invention without departing from the essence of the present invention, and these variations and combinations are still within the protection scope of the present invention.

Claims

1. A shield machine cutter head wear critical value alarm system, characterized by: It comprises a signal reflection ring (2); the signal reflection ring (2) is arranged in the cutter head (3); the cutter head (3) is installed on a cutter holder (6) via a roller cutter shaft (5); the cutter holder (6) is arranged on a shield machine; A signal receiving transmitter (1) is provided on the side of the tool holder (6) close to the tool disc (3); the surface of the signal reflection ring (2) is wrapped with a signal shielding material (10); and the signal receiving transmitter (1) is connected to an alarm system.

2. The shield machine cutter head wear critical value alarm system according to claim 1, characterized in that: The signal reflection ring (2) is arranged concentrically with the cutter disc (3), and the ring body of the signal reflection ring (2) is located at the wear critical value position of the cutter disc (3).

3. The shield machine cutter head wear critical value alarm system according to claim 1, characterized in that: A high-pressure cleaner (4) is also provided on one side of the tool holder (6) close to the cutter disc (3); an input end of the high-pressure cleaner (4) is connected to an external water supply device (8), and the external water supply device (8) is provided on the shield machine.

4. The shield machine cutter head wear critical value alarm system according to claim 1, characterized in that: The signal reflection ring (2) is also provided with a high temperature resistant coating (9), and the high temperature resistant coating (9) is coated on the outer wall of the signal shielding material (10).

5. The shield machine cutter head wear critical value alarm system according to claim 1, characterized in that: The alarm system comprises a controller and a buzzer (7), the signal receiving transmitter (1) is connected to the controller, and the controller is connected to the buzzer (7).

6. The shield machine cutter head wear critical value alarm system according to any one of claims 1 to 5, characterized in that: The signal receiving and transmitting device (1) is an electromagnetic wave signal receiving and transmitting device; the signal shielding material (10) is any one of silver fiber, silver cloth or copper cloth.

7. The shield machine cutter head wear critical value alarm system according to any one of claims 1 to 5, characterized in that: The signal receiving and transmitting device (1) is an ultrasonic signal receiving and transmitting device; the signal shielding material (10) is any one of polyethylene, graphene or aluminum.

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