CN-224223611-U - Abrasive water jet drilling and slotting integrated device

Abstract

The utility model relates to the technical field of mining engineering construction, in particular to a grinding material water jet drilling and slotting integrated device based on pressure control, which comprises a nozzle cap, a combined spray head, a mandrel, a bearing cover, a first needle roller thrust combined ball bearing, a first bearing jackscrew, a second needle roller thrust combined ball bearing, a movable ring group, a turbine blade, a guide blade, a static ring group, a spring, a drilling shell, a joint, a slotting shell, a high-low pressure switching valve, a slotting spray nozzle, a first sealing ring, a disc spring, a second sealing ring, a third sealing ring, a fourth sealing ring and a liquid inlet. The device has the advantages of simple and compact design structure, few related equipment, low failure rate and simple maintenance, can realize free conversion of drilling and slotting through water pressure control, simplifies the construction process, improves the construction efficiency and the construction operation safety, and reduces the construction cost.

Inventors

• Zai Penghui
• YUAN RUIFU
• WANG HONGQI
• FAN JUNKAI
• LIU ZHENPENG

Assignees

• 河南理工大学

Dates

Publication Date

20260512

Application Date

20250123

Claims (2)

1. 1. An abrasive water jet drilling and slotting integrated device, comprising: The novel high-pressure jet head comprises a jet head, a combined jet head, a mandrel (3), a bearing cover (4), a first needle roller thrust combined ball bearing (5), a first bearing jackscrew (6), a second bearing jackscrew (7), a second needle roller thrust combined ball bearing (8), a movable ring group (9), a turbine blade (10), a guide blade (11), a static ring group (12), a spring (13), a drilling shell (14), a joint (15), a slotting shell (16), a high-low pressure switching valve (17), a slotting nozzle (18), a first sealing ring (19), a disc spring (20), a second sealing ring (21), a third sealing ring (22), a fourth sealing ring (23) and a liquid inlet (24); the matching relation between the guide vane (11) and the inner cavity of the static ring group (12) is interference fit; The static ring group (12) is connected with the joint (15) through threaded fit; Sealing is achieved between the static ring set (12) and the drilling housing (14) through the third sealing ring (22); Mechanical sealing is realized between the static ring set (12) and the dynamic ring set (9) through the end surfaces of two shafts; the fit relation between the turbine blades (10) and the inner cavity of the movable ring group (9) is interference fit; The movable ring group (9) is connected with the mandrel (3) through threaded fit; the sealing between the movable ring group (9) and the drilling shell (14) is realized through a fourth sealing ring (23); the mandrel (3) is connected with the nozzle cap (1) through threaded fit; The high-low pressure switching valve (17) and the slit shell (16) are sealed through the first sealing ring (19) and the second sealing ring (21).
2. 2. Abrasive water jet drilling and slotting integrated device according to claim 1, characterized in that the guide vane (11) and the static ring set (12) remain stationary in the working state.

Description

Abrasive water jet drilling and slotting integrated device Technical Field The utility model relates to the technical field of mining engineering construction, in particular to an abrasive water jet drilling and slotting integrated device based on pressure control. Background Coal resources found in China are abundant at present, but coal seam occurrence conditions are complex, wherein coal seams belonging to hard and difficult-to-collapse roof account for about 1/3, and the coal seams are widely distributed in main production areas of coal mines in China. With the popularization of comprehensive mechanized coal mining technology, more than 40% of fully mechanized coal mining face top plates belong to hard and difficult-to-collapse top plates with strong compaction. The conventional roof cutting and pressure relief method is a blasting roof cutting method, and the method can effectively reduce the lateral old roof cantilever length of the roof of the working face, but has poor operability and high safety risk during roof cutting by blasting, and is extremely easy to cause excessive blasting or insufficient blasting, so that the roof coal rock mass still in use is often damaged. Another method is to use a high-pressure hydraulic slotting and roof-cutting pressure relief method, but the technology has a plurality of defects in the implementation process. Firstly, drilling operation is carried out, then slotting operation is carried out, drilling and slotting are needed to be respectively constructed, therefore, various construction equipment and facilities are needed to be used in a scheduling mode, and special equipment and personnel are needed in each operation step, so that the method is long in construction time, low in construction efficiency, complex in process and high in cost. In order to solve the defects in the existing high-pressure hydraulic slotting, roof cutting and pressure relief method, the utility model provides an abrasive water jet drilling and slotting integrated device based on pressure control, which integrates drilling, drilling and slotting functions into a whole, and can realize free conversion of drilling and slotting by controlling water pressure. Under the low pressure condition, the device provided by the utility model realizes the abrasive water jet drilling and drilling function through the self-rotating spray head, and when the water pressure rises to a certain value, the self-rotating spray head closing device automatically switches to the abrasive water jet to spray to two sides, so that the slotting function to the wall of the drilling hole is realized. The device can realize forward drilling and slotting to two sides of the wall of the drilling hole when the device exits, and can realize two functions of drilling and slotting by one drilling and drilling hole circulation, thereby greatly saving the construction time, improving the working efficiency, reducing the cost and providing a more efficient, safe and economic solution for roof pre-cracking in coal mining. Disclosure of Invention The utility model provides an abrasive water jet drilling and slotting integrated device based on pressure control, which aims to solve the problems in the prior art. An abrasive water jet drilling and slotting integrated device based on pressure control, which comprises: The device comprises a nozzle cap, a combined spray head, a mandrel, a bearing cover, a first needle roller thrust combined ball bearing, a first bearing jackscrew, a second needle roller thrust combined ball bearing, a movable ring set, turbine blades, guide blades, a static ring set, a spring, a drilling shell, a joint, a slotting shell, a high-low pressure switching valve, a slotting nozzle, a first sealing ring, a disc spring, a second sealing ring, a third sealing ring, a fourth sealing ring and a liquid inlet. Preferably, the fit relationship between the guide vane and the inner cavity of the static ring set is interference fit. The guide vane and the static ring group are always kept in a static state in a working state. Preferably, the stationary ring set is connected to the joint by a threaded fit. Preferably, sealing is achieved between the set of static rings and the drilling housing by means of the third sealing ring 22. Preferably, mechanical sealing is realized between the static ring set and the dynamic ring set through the end surfaces of the two shafts. Preferably, the fit relationship between the turbine blades and the inner cavity of the movable ring set is an interference fit. Preferably, the moving ring set is connected with the mandrel through threaded fit. Preferably, the sealing between the moving ring set and the drilling housing is achieved by a fourth sealing ring 23. Preferably, the mandrel is connected to the nozzle cap 1 by a screw fit. Preferably, the high-low pressure switching valve and the slit casing are sealed through the first sealing ring and the second sealing ring. And sealing is rea