A coal mine full-section hard rock TBM cutter head variable frequency drive buffer regulator

Abstract

The utility model belongs to the technical field of frequency conversion drive buffer regulator, specifically relates to a coal mine full -face hard rock TBM cutter head frequency conversion drive buffer regulator, including mounting seat, the top of mounting seat is connected with hydraulic cylinder, the top swing joint of hydraulic cylinder has piston connecting rod, the surface of piston connecting rod is sleeved with buffer spring, the top of hydraulic cylinder is connected with limit stop. The utility model discloses through the cooperation between limit stop, recess, guide rod, limit sensor, guide sleeve, locking bolt and thread groove, operating personnel unscrew locking bolt and then push limit sensor and move on piston connecting rod, then, limit sensor drives guide sleeve and moves along guide rod, subsequently, reconnect through locking bolt and thread groove, and this is convenient for adjusting the position of limit sensor, and then avoid buffer regulator not completely compressed, and limit sensor has detected the extreme position, resulting in the early shutdown of equipment, and this greatly improves the stability of use.

Description

Technical Field

[0001] This utility model belongs to the technical field of frequency conversion drive buffer regulators, specifically relating to a frequency conversion drive buffer regulator for a cutterhead of a full-section hard rock TBM in a coal mine. Background Technology

[0002] A variable frequency drive buffer regulator is an electrical system that combines variable frequency drive technology with a buffer regulation device. It is mainly used in the cutterhead drive of heavy machinery such as tunnel boring machines (TBMs) in coal mines. Its core function is to achieve stepless adjustment of the cutterhead speed and torque through variable frequency technology to adapt to the tunneling requirements under different geological conditions. At the same time, the buffer regulation device absorbs the impact energy during the tunneling process, protecting the motor and transmission system from damage and ensuring stable system operation.

[0003] In the use of variable frequency drive buffer regulators, they are installed between the frame and the cutter assembly. When the cutter head contacts the rock, the buffer regulator absorbs the impact energy generated during this contact. This is achieved by the piston connecting rod on the variable frequency drive buffer regulator moving to drive the limit sensor to contact the limit block, thus triggering the limit sensor. The signal is then fed back to the frequency converter, which then takes corresponding actions based on the signal, such as stopping the motor. This reduces the impact on the motor and gearbox. However, the installation position of the limit sensor on the piston connecting rod is fixed, while the variable frequency drive buffer regulator is installed on the frame. If the installation position on the frame surface is uneven, the sensor may detect the limit position before the buffer regulator is fully compressed, causing the equipment to stop prematurely. This greatly reduces the stability of the operation. Utility Model Content

[0004] The purpose of this utility model is to provide a frequency converter drive buffer regulator for a full-section hard rock TBM cutterhead in coal mines. It aims to solve the problem that in the existing technology, the limit sensor is installed in a fixed position on the piston connecting rod, while the frequency converter drive buffer regulator is installed on the frame. If there are pits or unevenness on the installation position of the frame surface, the sensor will detect the limit position before the buffer regulator is fully compressed, causing the equipment to stop prematurely, which greatly reduces the stability of use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a frequency converter drive buffer adjuster for a full-section hard rock TBM cutterhead in a coal mine, comprising a mounting base, a hydraulic cylinder connected to the top of the mounting base, a piston connecting rod movably connected to the top of the hydraulic cylinder, a mating block connected to the top of the piston connecting rod, a buffer spring sleeved on the surface of the piston connecting rod, a limit block connected to the top of the hydraulic cylinder, a groove formed on the surface of the piston connecting rod, a guide rod installed inside the groove, a limit sensor sleeved on the surface of the piston connecting rod, a guide sleeve connected to the inner side wall of the limit sensor, a locking bolt threaded through the surface of the limit sensor, and a set of threaded grooves longitudinally formed on the surface of the piston connecting rod.

[0006] As a preferred embodiment of the variable frequency drive buffer regulator for a full-section hard rock TBM cutterhead in a coal mine, the guide sleeve is adapted to the groove, and the guide sleeve is sleeved on the surface of the guide rod.

[0007] As a preferred embodiment of the variable frequency drive buffer regulator for a full-section hard rock TBM cutterhead in a coal mine, the limit sensor can be connected to the piston connecting rod in a sliding lifting connection via a guide sleeve and a guide rod.

[0008] As a preferred embodiment of the variable frequency drive buffer regulator for a full-section hard rock TBM cutterhead in a coal mine, the limit sensor can be detachably and fixedly connected to the piston connecting rod via locking bolts and threaded grooves.

[0009] In a preferred embodiment of the variable frequency drive buffer regulator for a full-section hard rock TBM cutterhead in a coal mine, the outer diameter of the limit sensor is smaller than the inner diameter of the buffer spring, and the limit sensor and the limit block have the same size.

[0010] As a preferred embodiment of the variable frequency drive buffer regulator for a full-section hard rock TBM cutterhead in a coal mine, the surface of the mounting base is provided with a through mounting hole, the top of the mounting base is connected to an annular block, and an annular sealing ring is adhered to the inner wall of the annular block.

[0011] In a preferred embodiment of the variable frequency drive buffer regulator for a full-section hard rock TBM cutterhead in a coal mine, the inner ring of the annular sealing ring has the same outer diameter as the mounting hole.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] By utilizing the cooperation between the limit block, groove, guide rod, limit sensor, guide sleeve, locking bolt, and threaded groove, the operator can unscrew the locking bolt and push the limit sensor to move on the piston connecting rod. Then, the limit sensor drives the guide sleeve to move along the guide rod. Subsequently, it is reconnected to the threaded groove via the locking bolt. This facilitates the adjustment of the limit sensor's position and prevents the limit sensor from detecting the limit position before the buffer regulator is fully compressed, thus avoiding premature shutdown of the equipment. This greatly improves the stability of operation.

[0014] By using the cooperation between the annular block and the annular sealing ring, the frequency converter drive buffer regulator is installed between the frame and the cutter assembly. Then, the bolts pass through the mounting holes and are connected to the frame. Next, the annular sealing ring seals the gap between the annular block and the bolt, preventing dust from seeping in from the gap between the annular block and the bolt when the cutter head is working on the rock. This greatly improves the convenience of subsequent disassembly and assembly of the frequency converter drive buffer regulator and prevents dust from affecting the disassembly and assembly of the bolts. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the three-dimensional disassembled structure of this utility model;

[0018] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the diagram;

[0019] Figure 4 This is a three-dimensional top view of the structure of this utility model.

[0020] In the diagram: 1. Mounting base; 2. Hydraulic cylinder; 3. Piston connecting rod; 4. Connecting block; 5. Buffer spring; 6. Limiting block; 7. Groove; 8. Guide rod; 9. Limit sensor; 10. Guide sleeve; 11. Locking bolt; 12. Threaded groove; 13. Mounting hole; 14. Annular block; 15. Annular sealing ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 This utility model provides the following technical solution: a frequency conversion drive buffer regulator for a full-section hard rock TBM cutterhead in a coal mine, including a mounting base 1, a hydraulic cylinder 2 connected to the top of the mounting base 1, a piston connecting rod 3 movably connected to the top of the hydraulic cylinder 2, a docking block 4 connected to the top of the piston connecting rod 3, a buffer spring 5 sleeved on the surface of the piston connecting rod 3, a limit block 6 connected to the top of the hydraulic cylinder 2, a groove 7 formed on the surface of the piston connecting rod 3, a guide rod 8 installed inside the groove 7, a limit sensor 9 sleeved on the surface of the piston connecting rod 3, a guide sleeve 10 connected to the inner side wall of the limit sensor 9, a locking bolt 11 threaded through the surface of the limit sensor 9, and a set of threaded grooves 12 longitudinally formed on the surface of the piston connecting rod 3.

[0023] In practical use, the variable frequency drive buffer adjuster consists of a mounting base 1, a hydraulic cylinder 2, a piston connecting rod 3, a docking block 4, a buffer spring 5, a limit block 6, and a limit sensor 9. Its model is HYDD25-80 hydraulic buffer device. In actual use, the variable frequency drive buffer adjuster is installed between the shield machine frame and the cutterhead assembly. That is, the docking block 4 is connected to the frame by bolts, and then the docking block 4 is connected to the cutterhead assembly. Then, when the cutterhead on the cutterhead assembly comes into contact with the rock, it absorbs the impact energy generated when the cutterhead comes into contact with the rock. That is, the piston connecting rod 3 on the variable frequency drive buffer adjuster moves to drive the limit sensor 9 to contact the limit block 6, and then triggers the limit sensor 9. Then, the signal is fed back to the frequency converter. Subsequently, the frequency converter makes corresponding actions according to the signal, such as stopping the motor. This reduces the impact on the motor and gearbox, thereby realizing the variable frequency drive buffer adjustment of the TBM cutterhead.

[0024] Preferably, the guide sleeve 10 is adapted to the groove 7 and is sleeved on the surface of the guide rod 8. The limit sensor 9 can form a sliding lifting connection with the piston connecting rod 3 through the guide sleeve 10 and the guide rod 8. The limit sensor 9 can form a detachable and fixed connection with the piston connecting rod 3 through the locking bolt 11 and the threaded groove 12. The outer diameter of the limit sensor 9 is smaller than the inner diameter of the buffer spring 5, and the limit sensor 9 has the same size as the limit block 6.

[0025] In practical use, the guide sleeve 10 is adapted to the groove 7, so that the movement of the guide sleeve 10 on the surface of the guide rod 8 is easy and stable. Then, the movement of the limit sensor 9 can drive the guide sleeve 10 on the surface of the guide rod 8, which can also ensure the stability of the movement of the limit sensor 9. Subsequently, the locking bolt 11 can fix the limit sensor 9 on the surface of the piston connecting rod 3. The longitudinal opening of the threaded groove 12 can adjust the stability of the limit sensor 9 on the surface of the piston connecting rod 3. The limit sensor 9 and the limit block 6 are the same size and smaller than the inner diameter of the buffer spring 5, so it will not affect the use of the buffer spring 5.

[0026] Preferably, a mounting hole 13 is formed through the surface of the mounting base 1, and an annular block 14 is connected to the top of the mounting base 1. An annular sealing ring 15 is adhered to the inner wall of the annular block 14. The inner diameter of the annular sealing ring 15 is the same as the outer diameter of the mounting hole 13.

[0027] In practical use, the inner ring of the annular sealing ring 15 has the same outer diameter as the mounting hole 13. This way, when the bolt is connected, the bolt will not squeeze the inner wall of the annular sealing ring 15, thus avoiding damage to the annular sealing ring 15. This greatly improves the safety of using the annular sealing ring 15. The annular sealing ring 15 is made of rubber, which ensures its durability.

[0028] Working principle: The operator first installs the frequency converter drive buffer regulator between the frame and the tool assembly. Then, the operator connects the mating block 4 to the frame with bolts, and then fixes the mating block 4 to the tool assembly. Subsequently, the operator unscrews the locking bolt 11 and pushes the limit sensor 9 to slide along the piston connecting rod 3. At this time, the limit sensor 9 drives the guide sleeve 10 to move synchronously along the guide rod 8. After adjusting to the appropriate position, the locking bolt 11 is screwed back into the threaded groove 12 to complete the fixation. This allows for flexible adjustment of the detection position of the limit sensor 9, preventing the limit sensor 9 from erroneously triggering the limit signal when the buffer regulator is not fully compressed after the installation position on the frame surface is uneven. This effectively prevents the equipment from stopping prematurely and significantly improves system performance. To ensure stability, at the bolt connection between the connecting block 4 and the frame, the annular sealing ring 15 seals between the annular block 14 and the bolt. This effectively blocks the dust generated when the cutter head cuts the rock, preventing dust from entering through the gap between the annular block 14 and the bolt. This not only ensures the cleanliness of the inside of the variable frequency drive buffer regulator but also greatly simplifies the subsequent disassembly and maintenance process. When the cutter head on the cutter assembly contacts the rock, the variable frequency drive buffer regulator absorbs the impact energy through the extension and retraction of the piston connecting rod 3. When the piston moves to the limit position, it triggers the limit sensor 9, which then feeds the signal back to the frequency converter. Subsequently, the frequency converter takes corresponding actions based on the signal, such as stopping the motor, thus reducing the impact on the motor and gearbox, thereby realizing the variable frequency drive buffer adjustment of the TBM cutter head.

[0029] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A frequency converter drive buffer regulator for a cutterhead of a full-section hard rock TBM in a coal mine, comprising a mounting base (1), characterized in that: The top of the mounting base (1) is connected to a hydraulic cylinder (2), the top of the hydraulic cylinder (2) is movably connected to a piston connecting rod (3), the top of the piston connecting rod (3) is connected to a docking block (4), a buffer spring (5) is sleeved on the surface of the piston connecting rod (3), and a limit block (6) is connected to the top of the hydraulic cylinder (2). The piston connecting rod (3) has a groove (7) on its surface. A guide rod (8) is installed inside the groove (7). A limit sensor (9) is sleeved on the surface of the piston connecting rod (3). A guide sleeve (10) is connected to the inner side wall of the limit sensor (9). A locking bolt (11) is threaded through the surface of the limit sensor (9). A set of threaded grooves (12) is longitudinally opened on the surface of the piston connecting rod (3).

2. The frequency conversion drive buffer regulator for a full-section hard rock TBM cutterhead in a coal mine according to claim 1, characterized in that: The guide sleeve (10) is adapted to the groove (7), and the guide sleeve (10) is sleeved on the surface of the guide rod (8).

3. The frequency conversion drive buffer regulator for a full-section hard rock TBM cutterhead in a coal mine according to claim 1, characterized in that: The limit sensor (9) can be connected to the piston connecting rod (3) in a sliding lifting connection through the guide sleeve (10) and the guide rod (8).

4. The frequency conversion drive buffer regulator for a full-section hard rock TBM cutterhead in a coal mine according to claim 1, characterized in that: The limit sensor (9) can be detachably and fixedly connected to the piston connecting rod (3) by means of locking bolt (11) and threaded groove (12).

5. The frequency conversion drive buffer regulator for a full-section hard rock TBM cutterhead in a coal mine according to claim 1, characterized in that: The outer diameter of the limit sensor (9) is smaller than the inner diameter of the buffer spring (5), and the limit sensor (9) and the limit block (6) are the same size.

6. The frequency conversion drive buffer regulator for a full-section hard rock TBM cutterhead in a coal mine according to claim 1, characterized in that: The mounting base (1) has a through mounting hole (13) on its surface. The top of the mounting base (1) is connected to an annular block (14), and an annular sealing ring (15) is adhered to the inner wall of the annular block (14).

7. A frequency conversion drive buffer regulator for a full-section hard rock TBM cutterhead in a coal mine according to claim 6, characterized in that: The inner ring of the annular sealing ring (15) has the same outer diameter as the mounting hole (13).

Images