阅读说明：本技术 易于煤矿井下更换磁环的推移千斤顶 (Pushing jack easy for replacing magnetic ring under coal mine ) 是由 付祖冈 赵伟方 白海明 程相榜 刘晟 黄自炎 王璐 杨愿愿 张海生 屈海艳 于 2019-09-19 设计创作，主要内容包括：本发明公开了一种易于煤矿井下更换磁环的推移千斤顶,包括由缸筒、缸底、导向套、活塞和活塞杆组件、磁管、传感器和防尘堵组成的推移千斤顶本体；缸底内端面开设有用于固定磁管的螺纹孔,磁管一端通过外螺纹与螺纹孔螺接而另一端设置有第一旋拧部；活塞杆内开设有装配通孔,磁管间隙插装在装配通孔内；传感器为杆状结构,一端间隙插装在磁管内而另一端延伸出磁管与装配通孔内壁相螺接,在延伸出磁管的传感器端部设置有第二旋拧部；活塞杆装配通孔内位于第二旋拧部的一侧螺接有防尘堵,防尘堵的端部设置有第三旋拧部。本发明通过扳手可方便的在工作面现场进行磁管更换而不需要拆解导向套和活塞杆、活塞组件,避免了推移千斤顶升井拆解。(The invention discloses a pushing jack easy for replacing a magnetic ring under a coal mine, which comprises a pushing jack body, a pushing jack body and a magnetic pipe, wherein the pushing jack body consists of a cylinder barrel, a cylinder bottom, a guide sleeve, a piston rod assembly, a sensor and a dustproof plug; a threaded hole for fixing the magnetic pipe is formed in the inner end face of the cylinder bottom, one end of the magnetic pipe is in threaded connection with the threaded hole through external threads, and a first screwing part is arranged at the other end of the magnetic pipe; an assembly through hole is formed in the piston rod, and the magnetic tube is inserted into the assembly through hole in a clearance mode; the sensor is of a rod-shaped structure, one end of the sensor is inserted into the magnetic pipe in a clearance mode, the other end of the sensor extends out of the magnetic pipe and is in threaded connection with the inner wall of the assembling through hole, and a second screwing part is arranged at the end part of the sensor extending out of the magnetic pipe; one side spiro union that is located the second in the piston rod assembly through-hole revolves the portion has dustproof stifled, and dustproof stifled tip is provided with the third and revolves the portion of revolving. The invention can conveniently replace the magnetic pipe on the working surface site through the wrench without disassembling the guide sleeve, the piston rod and the piston assembly, thereby avoiding the disassembly of the jacking well of the pushing jack.)

1. A push jack easy for replacing a magnetic ring under a coal mine well comprises a push jack body, a magnetic ring body, a sensor and a dustproof plug, wherein the push jack body consists of a cylinder barrel, a cylinder bottom, a piston and a piston rod assembly which are inserted into the cylinder barrel in a sliding sealing mode through a guide sleeve, and the magnetic ring body is arranged on the cylinder barrel; the method is characterized in that: a threaded hole for fixing the magnetic ring body is formed in the center of the inner end face of the cylinder bottom; the magnetic ring body is a magnetic pipe with a tubular structure, one end of the magnetic pipe is in threaded connection with the threaded hole through external threads, and the other end of the magnetic pipe is provided with a first screwing part; an assembly through hole for inserting a magnetic tube is axially formed in the piston rod, and the magnetic tube is inserted into the assembly through hole in a clearance manner; the sensor is of a rod-shaped structure, one end of the sensor is inserted into the magnetic tube with a gap, the other end of the sensor extends out of the magnetic tube and is in threaded connection with the inner wall of the assembly through hole of the piston rod through external threads, and a second screwing part is arranged at the end part of the sensor extending out of the magnetic tube; and a dustproof plug is screwed on one side of the second screwing part in the piston rod assembly through hole, and a third screwing part is arranged at the end part of the dustproof plug.

2. A pushing jack easy for replacing a magnetic ring under a coal mine well as defined in claim 1, wherein: the first screwing part is a straight-line-shaped groove or a cross-shaped groove which is formed in the end face of the magnetic tube and used for screwing a screwdriver.

3. A pushing jack easy for replacing magnetic rings under a coal mine well as defined in claim 1 or 2, wherein: the second screwing part is a four-edge blind hole or a six-edge blind hole which is formed in the end face of the sensor and used for screwing a wrench.

4. A pushing jack easy for replacing magnetic rings under a coal mine well as defined in claim 1 or 2, wherein: the third screwing part is a prismatic blind hole which is arranged at the end part of the dustproof plug and used for screwing a wrench.

Technical Field

The invention relates to a coal mine underground hydraulic support, in particular to a pushing jack which is easy to replace a magnetic ring in a coal mine underground.

background

In order to realize the digitization, the intellectualization and the unmanned of the fully mechanized mining working face, the pushing jack for the underground moving frame of the hydraulic support mostly adopts an electro-hydraulic control system, namely: a sensor and a magnetic ring are arranged in the pushing jack and used for detecting the telescopic distance of the pushing jack. Currently, the structure of such a pushing jack is shown in fig. 1.1-1.4: the bottom 1.1 of the cylinder barrel is of a step through hole 1.2 structure and is used for positioning the sensor 1.3 and fixed on the bottom 1.1 through the backstop plug 1.4. The bottom end face of the piston rod 1.5 is of a step blind hole 1.6 structure, the magnetic ring 1.7 is installed at the step hole at the left end of the piston rod 1.5, and the rod bodies of the sensor 1.3 are sequentially sleeved in the inner hole of the magnetic ring 1.7 and the step blind hole 1.6 in a clearance mode. The magnetic ring 1.7 is a component structure, a permanent strong magnet 1.8 is embedded in the magnetic ring, and a strong magnetic field is formed around the magnetic ring, so that a circuit passing through the magnetic field is changed. Because the magnetic ring 1.7 belongs to a quick-wear part, and the outer diameter of the magnetic ring 1.7 is larger than the diameter of the through hole 1.2 of the step at the bottom of the cylinder, the jack is required to be disassembled to complete the periodic replacement of the magnetic ring 1.7 during the installation and the disassembly; the specific process is as follows: unscrewed dust plug 1.9 → unscrewed withdrawal prevention plug 1.4 → taken out sensor 1.3 → disassembled guide sleeve 2.0 → disassembled piston rod 1.5 → taken out old magnetic ring 1.7 → installed new magnetic ring 1.7 → installed piston rod 1.5 → installed guide sleeve 2.0 → installed sensor 1.3 → installed withdrawal prevention plug 1.4 → installed dust plug 1.9. Due to the structure of the pushing jack, the process of replacing the magnetic ring 1.7 is very complicated, the labor intensity is high, and the working efficiency is low. Especially when dismantling uide bushing 2.0, because the environment is abominable in the pit, often rust between uide bushing 2.0 and the cylinder 2.1 and die, must transport the pusher jack to the aboveground and adopt professional equipment to disassemble, waste time and energy.

Disclosure of Invention

The invention aims to provide a pushing jack which is easy to replace a magnetic ring under a coal mine.

In order to achieve the purpose, the invention adopts the following technical scheme:

the pushing jack easy for replacing the magnetic ring under the coal mine comprises a pushing jack body, a pushing jack body and a magnetic ring body, wherein the pushing jack body consists of a cylinder barrel, a cylinder bottom, a piston and a piston rod assembly which are inserted into the cylinder barrel in a sliding sealing mode through a guide sleeve, a sensor and a dustproof plug; a threaded hole for fixing the magnetic ring body is formed in the center of the inner end face of the cylinder bottom; the magnetic ring body is a magnetic pipe with a tubular structure, one end of the magnetic pipe is in threaded connection with the threaded hole through external threads, and the other end of the magnetic pipe is provided with a first screwing part; an assembly through hole for inserting a magnetic tube is axially formed in the piston rod, and the magnetic tube is inserted into the assembly through hole in a clearance manner; the sensor is of a rod-shaped structure, one end of the sensor is inserted into the magnetic tube with a gap, the other end of the sensor extends out of the magnetic tube and is in threaded connection with the inner wall of the assembly through hole of the piston rod through external threads, and a second screwing part is arranged at the end part of the sensor extending out of the magnetic tube; and a dustproof plug is screwed on one side of the second screwing part in the piston rod assembly through hole, and a third screwing part is arranged at the end part of the dustproof plug.

The first screwing part is a straight-line-shaped groove or a cross-shaped groove which is formed in the end face of the magnetic tube and used for screwing a screwdriver.

The second screwing part is a four-edge blind hole or a six-edge blind hole which is formed in the end face of the sensor and used for screwing a wrench.

the third screwing part is a prismatic blind hole which is arranged at the end part of the dustproof plug and used for screwing a wrench.

Compared with the existing pushing jack structure, the magnetic ring (pipe) replacement can be conveniently carried out on the working face through a wrench without disassembling a guide sleeve, a piston rod and a piston assembly, the operation is simple and convenient, the flow time for replacing the magnetic ring (pipe) is shortened by over 50 percent, the mining shutdown phenomenon caused by disassembling the pushing jack well is avoided, and the production efficiency is improved by about 80 percent.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic view of the structure of the cylinder bottom according to the present invention.

Fig. 3 is a schematic structural view of the magnetic ring of the present invention.

Fig. 4 is a schematic diagram of the structure of the sensor of the present invention.

Fig. 5 is a schematic structural view of the piston rod of the present invention.

Fig. 1.1 is a schematic structural diagram of a conventional pushing jack.

Fig. 1.2 is a schematic view of a cylinder bottom structure of a conventional pushing jack.

Fig. 1.3 is a schematic view of a magnetic ring structure of a conventional pushing jack.

Fig. 1.4 is a schematic structural diagram of a piston rod of a conventional pushing jack.

Detailed Description

The following describes embodiments of the present invention in detail with reference to the drawings, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the scope of the present invention is not limited to the following embodiments.

As shown in figures 1-5, the pushing jack easy for replacing the magnetic ring under the coal mine comprises a pushing jack body consisting of a cylinder barrel 1, a cylinder bottom 2, a piston 4 and piston rod 5 assembly which is inserted in the cylinder barrel 1 in a sliding and sealing mode through a guide sleeve 3, a magnetic ring body, a sensor 6 and a dustproof plug 7. As shown in fig. 2, a screw hole 8 for fixing a magnetic ring body is formed in the center of the inner end surface of the cylinder bottom 2; the magnetic ring body is a magnetic tube 9 with a tubular structure, one end of the magnetic tube 9 is in threaded connection with the screw hole 8 through external threads, and the other end of the magnetic tube 9 is provided with a first screwing part. As shown in fig. 3, the first screwing part is formed as a linear groove 10, and the magnetic tube 9 can be screwed into or out of the screw hole 8 by a linear screwdriver. Of course, the first screw portion may be provided as a cross-shaped groove.

As shown in fig. 5, an assembling through hole 11 for inserting the magnet tube 9 is axially formed in the piston rod 5, and the magnet tube 9 is inserted into the assembling through hole 11 with a gap.

As shown in fig. 4, the sensor 6 is a rod-shaped structure, one end of the sensor 6 is inserted into the magnetic tube 9 with a gap, the other end of the sensor 6 extends out of the magnetic tube 9 and is screwed with the inner wall of the assembly through hole 11 of the piston rod 5 through an external thread, and a second screwing part is arranged at the end of the sensor 6 extending out of the magnetic tube 9; the second screwing part is a square blind hole 12 which is formed in the end face of the sensor 6 and used for screwing an external square torque wrench, the sensor 6 can be screwed into or out of the assembling through hole 11 through the external square torque wrench, and the second screwing part can also be a six-square blind hole.

As shown in fig. 1, the dust plug 7 is screwed in the piston rod assembly through hole 11 at one side of the second screwing part, and a third screwing part is arranged at the end part of the dust plug 7; the third screwing part is a prism or a hexagonal blind hole which is arranged at the end part of the dustproof plug 7 and used for screwing a wrench, and the dustproof plug 7 can be screwed in or out of the assembling through hole 11 through a solid wrench or an external hexagonal torque wrench.

The specific disassembly and assembly process for replacing the magnetic tube comprises the following steps:

1. Screwing out the dustproof plug 7: screwing the dustproof plug 7 out of the port of the assembling through hole 11 by using a solid wrench or a torque wrench;

2. disassembling the sensor 6: screwing the sensor 6 out of the port of the assembling through hole 11 by an external square torque wrench, and taking out the sensor from the magnetic tube 9;

3. Disassembling the magnetic tube 9: screwing the magnetic tube 9 out of the threaded hole 8 in the center of the end face of the cylinder bottom 2 by using a linear screwdriver, and taking out the magnetic tube from the port of the assembling through hole 11;

4. Installing a magnetic tube 9: the magnetic tube 9 is fastened in the threaded hole 8 at the center of the end surface of the cylinder bottom 2 from the port of the assembling through hole 11 through a linear screwdriver;

5. Mounting a sensor 6: the sensor 6 is penetrated into an inner hole of the magnetic tube 9 from the port of the assembling through hole 11, and the sensor 6 is fastened in the assembling through hole 11 through an external square torque wrench;

6. Installing a dustproof plug 7: and fixing the dustproof plug 7 in the port of the assembly through hole 11 by using a solid wrench or a torque wrench to complete the replacement of the magnetic tube 9.