CN115585196A - Split locking two-way transmission device and method for intermediate loading and unloading rod drilling rig in coal mine - Google Patents

Abstract

The present invention provides a split-locking two-way transmission device and method for an intermediate loading and unloading rod drilling rig in a coal mine. The locking seat includes a hollow locking shaft, on which two or more positioning chambers arranged at equal intervals in the circumferential direction are arranged radially; each positioning chamber is equipped with a positioning ball; the power shaft includes a hollow power shaft body; The outer surface of the shaft body is provided with an arc-shaped positioning groove; the power shaft body of the power shaft is set in the locking shaft until the positioning chamber is radially aligned with the arc-shaped positioning groove, and the radial inner side of the positioning ball can enter the arc-shaped positioning groove Implement locking. The invention adopts technical means such as split structure, quick disassembly of thread, axial locking and anti-loosening, partial replacement of parts, etc., realizes two-way power transmission, improves the service life of the transmission device, dismantles and replaces the efficiency, and reduces the comprehensive use cost.

Description

Split locking two-way transmission device and method for intermediate loading and unloading rod drilling rig in coal mine

technical field

The invention belongs to the technical field of underground tunnel drilling in coal mines, and relates to a transmission device for a drilling rig, in particular to a split locking two-way transmission device for an intermediate rod loading and unloading drilling rig in an underground coal mine and a use method thereof.

Background technique

Drilling is an effective technical means for underground coal mine geological exploration and disaster prevention and control. Drilling rig is the core equipment of drilling construction. It needs to continuously add and disassemble drill pipes to realize long-distance drilling construction. According to the different loading and unloading methods of drill pipes, there are currently two methods: rear loading and unloading rods and middle loading and unloading rods.

The rear loading and unloading rod refers to loading and unloading the drill pipe from the rear of the power head of the drilling rig. It is necessary to remove the water feeder first, then connect/disassemble the drill pipe, and then connect the water feeder. Although it does not require a special transmission device, the loading and unloading rod The process is long and time-consuming, and it is mainly used for conventional drilling rigs.

The intermediate loading and unloading rod refers to loading and unloading the drill pipe from the middle of the drilling rig power head and the holder. It adopts a special transmission device. When loading and unloading the drill pipe each time, it is only necessary to disassemble and connect the thread between the transmission device and the drill pipe. , loading and unloading rods are easy to operate and fast, and are mainly used for automatic drilling rigs and intelligent drilling rigs to realize automatic loading and unloading of drill rods. At present, the transmission device adopts an integrated structure, which has the following shortcomings in practical application:

(A) The service life is short. During drilling construction, it is necessary to frequently disassemble and connect the thread between the transmission device and the drill pipe, resulting in the easy wear and failure of the connection thread between the transmission device and the drill pipe, and a short service life.

(B) The efficiency of disassembly and replacement is low. When the transmission device is damaged and replaced, the entire transmission device needs to be removed from the power head of the drilling rig first, and then a new transmission device should be replaced and connected. The flange connection between the transmission device and the drilling rig power head is generally adopted, and considering the high-torque transmission requirements of the drilling rig, the number of connecting bolts is large, and each disassembly and installation takes a long time and is inefficient.

(C) The comprehensive cost is high. Considering the need for high-torque transmission of drilling rigs, in order to improve the overall strength of the transmission device, the transmission device is generally processed in one piece with large-diameter steel. The processing volume is large, the loss is large, and the replacement is frequent during use, resulting in a very high overall cost.

Contents of the invention

In view of the deficiencies in the prior art, the object of the present invention is to provide a split-lock bidirectional transmission device for an intermediate loading and unloading rod drilling rig in a coal mine and a method of use thereof, so as to solve the problem of the transmission device for an intermediate loading and unloading rod drilling rig in a coal mine in the prior art. There are technical problems of short service life, low disassembly and replacement efficiency, and high overall cost.

In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve:

The utility model relates to a split locking two-way transmission device for an intermediate loading and unloading rod drilling rig in a coal mine, which includes a power shaft and a transmission shaft connected in sequence, and a locker is sleeved on the outside of the power shaft and the transmission shaft.

The locker includes a locking seat, and the locking seat includes a hollow locking shaft, and two or more positioning bins arranged at equal intervals in the circumferential direction are arranged radially on the locking shaft; each positioning bin is equipped with a positioning The ball, the positioning ball can radially move in the positioning chamber, and the radial inner side of the positioning ball can be exposed to the locking shaft.

The power shaft includes a hollow power shaft body; the outer surface of the power shaft body is provided with an arc-shaped positioning groove; the power shaft body of the power shaft is sleeved in the locking shaft to the positioning chamber and the arc-shaped positioning groove In the state of radial alignment, the radial inner side of the positioning ball can enter the arc-shaped positioning groove to realize the positioning and locking of the power shaft and the locker.

An adjustment sleeve capable of circumferential rotation and axial movement is set on the locking seat, and the adjustment sleeve includes a hollow adjustment shaft; a circle of third positioning bosses is arranged on the rear part of the inner wall of the adjustment shaft, and the first A circle of arc-shaped limiting steps is provided at the connection between the three positioning bosses and the rear part of the inner wall of the adjusting shaft, and the arc-shaped limiting steps can limit the radial movement of the positioning ball.

The front part of the outer wall of the locking shaft is equipped with a limit sleeve, the limit sleeve is located in the adjustment shaft, and the spring is installed outside the lock shaft in the adjustment shaft, one end of the spring is on the limit sleeve, and the other end of the spring is on the on the third positioning boss.

The present invention also has the following technical features:

The front part of the inner wall of the adjustment shaft is provided with two or more first sector blocks arranged at equal intervals along the circumferential direction; the limit sleeve includes a hollow limit shaft, and the outer wall of the limit shaft is along the circumferential direction. Two or more second sector blocks are arranged at equal intervals, and two or more third sector blocks are arranged at equal intervals along the circumferential direction on the outer wall of the limit shaft; the second sector blocks are located on the third sector block the rear; the number of the first sector block, the second sector block and the third sector block is the same, and the first sector block can cooperate with the second sector block and the third sector block Blocking or misalignment realizes the adjustment of the front end stroke of the adjustment sleeve.

The front part of the outer wall of the locking shaft is provided with a third male thread, and the inner wall of the limiting shaft is provided with a third female thread. connect.

The rear part of the outer wall of the locking shaft is provided with a second positioning boss extending outward, and the second positioning boss is used to limit the rear end stroke of the adjustment sleeve.

The front end of the power shaft body is provided with a first male thread, and the rear end of the transmission shaft body is provided with a first female thread. Detachable connection lock between.

The rear end of the power shaft body is provided with a flange connected to the power head of the drilling rig; a group of axially opened bolt holes are arranged on the upper circumference of the flange, and the rear end surface of the flange A sealing groove is provided.

The transmission shaft includes a hollow transmission shaft body, the outer front part of the transmission shaft body is provided with a positioning section, and the outer diameter of the positioning section is smaller than the outer diameter of the transmission shaft body; the inner wall front part of the locking shaft is provided with There is a first positioning boss extending inward, the first positioning boss is set on the positioning section, the first positioning boss is axially limited by the shoulder between the positioning section and the transmission shaft body, and the transmission shaft and the locking are realized The limit lock of the device.

The front end of the transmission shaft body is provided with a second male thread connected with the drill rod.

The present invention also protects a method for using a split locking two-way transmission device for an underground intermediate loading and unloading rod drilling rig in a coal mine.

Compared with the prior art, the present invention has the following technical effects:

(I) The present invention adopts technical means such as split structure, quick disassembly of thread, axial locking and anti-loosening, partial replacement of parts, etc., to realize the two-way power transmission of the transmission device of the middle loading and unloading rod drilling rig in the coal mine, and at the same time improve the service life of the transmission device, The efficiency of disassembly and replacement reduces the overall cost of use, and provides a guarantee for the construction of automatic and intelligent drilling rigs with high-efficiency intermediate loading and unloading of drill pipes.

(II) The present invention can realize two-way power transmission. Considering the cost of use and replacement efficiency, the two-way transmission device adopts a split structure and a threaded connection method; in view of the problem that the threaded connection can only transmit one-way rotary power and is easy to loosen when it is rotated in the opposite direction, a locker is used to limit the power shaft and the transmission shaft The space between the thread and the loose buckle securely connects the power shaft and the transmission shaft together, realizing two-way power transmission.

(III) The service life of the present invention is long. The two-way transmission adopts a split structure, which separates the undamaged power shaft and locker from the easily damaged transmission shaft, reducing the proportion of vulnerable parts in the overall structure and improving the overall service life.

(IV) The replacement speed of the present invention is fast. When the two-way transmission device is replaced each time, only the limit position of the locker needs to be adjusted, and the connection thread between the transmission shaft and the power shaft can be disassembled, and the disassembly and reinstallation speed is fast.

(V) The comprehensive cost of the present invention is low. Every time the two-way transmission device is damaged, only the transmission shaft needs to be replaced, which avoids the overall replacement; and the transmission shaft has a simple structure and low cost, thereby reducing the single replacement cost and improving the comprehensive economic benefits.

Description of drawings

Fig. 1 is a schematic diagram of the overall sectional structure of the split-lock bidirectional transmission device for the middle loading and unloading rod drilling rig in the coal mine.

Fig. 2 is a schematic cross-sectional structure diagram of the power shaft.

Fig. 3 is a schematic cross-sectional structural view of the transmission shaft.

Fig. 4 is a schematic diagram of the overall sectional structure of the locker.

Fig. 5 is a schematic cross-sectional structural view of the locking seat.

FIG. 6 is a schematic diagram of the A-A cross-sectional structure in FIG. 5 .

Fig. 7 is a frontal sectional structural schematic diagram of the adjustment sleeve.

Fig. 8 is a left view structural diagram of the adjustment sleeve.

Fig. 9 is a right structural schematic diagram of the adjustment sleeve.

Fig. 10 is a frontal sectional structural schematic diagram of the spacer sleeve.

Fig. 11 is a schematic diagram of the left view of the spacer sleeve.

Fig. 12 is a right view structural diagram of the spacer sleeve.

Fig. 13 is a schematic diagram of the connection and use state of the two-way transmission device.

The meaning of each label in the figure is: 1-power shaft, 2-transmission shaft, 3-locker, 4-drilling machine, 5-power head, 6-drill pipe, 7-holder, 8-two-way transmission, 9- drill. 10 - Drill holes.

101-power shaft body, 102-the first public thread, 103-arc positioning groove, 104-flange, 105-bolt hole, 106-seal groove.

201-transmission shaft body, 202-second male thread, 203-first female thread, 204-positioning section.

301-locking seat, 302-adjusting sleeve, 303-locating ball, 304-limiting sleeve, 305-spring.

30101-lock shaft, 30102-the first positioning boss, 30103-the second positioning boss, 30104-locating bin, 30105-the third male thread.

30201-adjusting shaft, 30202-the first sector block, 30203-arc limit step, 30204-the third positioning boss.

30401-limiting shaft, 30402-second sector block, 30403-third sector block, 30404-third female thread.

The specific content of the present invention will be further explained in detail below in conjunction with the examples.

detailed description

It should be noted that all components and equipment in the present invention, unless otherwise specified, all adopt components and equipment known in the prior art. For example, drill rigs, power heads, drill rods, holders and drill bits all employ equipment known in the art.

In view of the defects given in the background technology, the present invention researches and designs a coal mine in view of the short service life, low disassembly and replacement efficiency, and high comprehensive cost of the split-lock two-way transmission device for the current coal mine intermediate loading and unloading rod drilling rig. The split locking two-way transmission device and the use method for the downhole intermediate rod loading and unloading drilling rig overcome the above-mentioned defects.

The two-way transmission device of the present invention includes a power shaft and a transmission shaft connected in sequence, and a lock sleeved on the outside of the power shaft and the transmission shaft. When the two-way transmission is used, the locker restricts the movable space between the power shaft and the transmission shaft, and the power shaft and the transmission shaft are tightly connected together to transmit the forward rotation power and reverse rotation power of the drilling rig to the drill rod, and then drive The drill bit breaks rocks and drills; when the drive shaft is worn out, the drive shaft can be replaced quickly by removing the locker. The invention solves the problems of frequent loading and unloading drill pipe threads of the transmission device of the coal mine underground intermediate loading and unloading drilling rig, easy wear, short service life, low disassembly and replacement efficiency, high comprehensive cost, etc., and is an efficient intermediate loading and unloading drill pipe construction for automatic and intelligent drilling Guarantees are provided.

Specific embodiments of the present invention are provided below, and it should be noted that the present invention is not limited to the following specific embodiments, and all equivalent transformations done on the basis of the technical solutions of the present application all fall within the scope of protection of the present invention.

Example 1:

This embodiment provides a split locking two-way transmission device for the middle loading and unloading rod drilling rig in coal mines, as shown in Fig. Locker 3.

As shown in Figure 4, the locker 3 includes a locking seat 301. As shown in Figures 5 and 6, the locking seat 301 includes a hollow locking shaft 30101, and the locking shaft 30101 is radially connected with two holes arranged at equal intervals in the circumferential direction. One or more positioning bins 30104; each positioning bin 30104 is equipped with a positioning ball 303, the positioning ball 303 can move radially in the positioning bin 30104, and the radial inner side of the positioning ball 303 can be exposed to the locking shaft 30101.

As shown in Figure 2, the power shaft 1 includes a hollow power shaft body 101; the outer surface of the power shaft body 101 is provided with an arc-shaped positioning groove 103; the power shaft body 101 of the power shaft 1 is set in the locking shaft 30101 to the positioning chamber 30104 When radially aligned with the arc-shaped positioning groove 103 , the radial inner side of the positioning ball 303 can enter the arc-shaped positioning groove 103 to realize the positioning and locking of the power shaft 1 and the locker 3 .

As shown in Figure 4, an adjustment sleeve 302 capable of circumferential rotation and axial movement is set on the locking seat 301, as shown in Figure 7, Figure 8 and Figure 9, the adjustment sleeve 302 includes a hollow adjustment shaft 30201; the adjustment shaft 30201 A circle of third positioning bosses 30204 is provided at the rear of the inner wall of the inner wall, and a circle of arc-shaped limit steps 30203 is arranged at the connection between the third positioning boss 30204 and the inner wall rear of the adjustment shaft 30201. The arc-shaped limit steps 30203 can The radial movement of the positioning ball 303 is restricted.

As shown in Figure 4, the front portion of the outer wall of the locking shaft 30101 is equipped with a limit sleeve 304, the limit sleeve 304 is located in the adjustment shaft 30201, and the spring 305 is installed in the adjustment shaft 30201 and is sleeved outside the lock shaft 30101, and one end of the spring 305 is placed on the On the limiting sleeve 304 , the other end of the spring 305 abuts on the third positioning boss 30204 .

In this embodiment, as shown in FIG. 5 and FIG. 6 , the positioning bin 30104 is a bowl-shaped structure.

As a specific solution of this embodiment, as shown in Figure 7, Figure 8 and Figure 9, the front part of the inner wall of the adjustment shaft 30201 is provided with two or more first fan-shaped blocks 30202 arranged at equal intervals along the circumferential direction; As shown in Fig. 10, Fig. 11 and Fig. 12, the limit sleeve 304 includes a hollow limit shaft 30401, and the outer wall of the limit shaft 30401 is provided with two or more second fan-shaped blocks 30402 at equal intervals along the circumferential direction. The outer wall of the bit axis 30401 is also provided with two or more third sector blocks 30403 at equal intervals in the circumferential direction; the second sector blocks 30402 are located behind the third sector blocks 30403; the first sector blocks 30202, the second The number of sector blocks 30402 and the third sector blocks 30403 are the same, and the first sector blocks 30202 can cooperate with the second sector blocks 30402 and the third sector blocks 30403 to block or dislocate, so as to realize the adjustment sleeve 302 Adjustment of front end travel.

Further preferably, as shown in Fig. 4, Fig. 5 and Fig. 10, the front part of the outer wall of the locking shaft 30101 is provided with a third male thread 30105, the inner wall of the limit shaft 30401 is provided with a third female thread 30404, the third male thread 30105 and The matching installation of the third female thread 30404 realizes the detachable connection and locking of the locking shaft 30101 and the limiting shaft 30401 .

As a preferred solution of this embodiment, as shown in Figure 4 and Figure 5, the rear part of the outer wall of the locking shaft 30101 is provided with a second positioning boss 30103 extending outward, and the second positioning boss 30103 is used to define the adjustment sleeve 302 back end stroke.

As a preferred solution of this embodiment, as shown in Figure 1, Figure 2 and Figure 3, the front end of the power shaft body 101 is provided with a first male thread 102, and the rear end of the transmission shaft body 201 is provided with a first female thread 203, The mating installation of the first male thread 102 and the first female thread 203 realizes the connection between the power shaft body 101 and the transmission shaft body 201 .

As a preferred solution of this embodiment, as shown in Figure 2, the rear end of the power shaft body 101 is provided with a flange 104 connected to the power head 5 of the drilling rig 4; A sealing groove 106 is provided on the rear end surface of the flange 104 toward the opened bolt hole 105 .

As a preferred solution of this embodiment, as shown in Fig. 3 and Fig. 5, the transmission shaft 2 includes a hollow transmission shaft body 201, and a positioning section 204 is arranged on the outer front portion of the transmission shaft body 201, and the outer diameter of the positioning section 204 Smaller than the outer diameter of the transmission shaft body 201; the front part of the inner wall of the locking shaft 30101 is provided with a first positioning boss 30102 extending inward, and the first positioning boss 30102 is sleeved on the positioning section 204, and the first positioning boss 30102 passes through the positioning The shaft shoulder between the section 204 and the transmission shaft body 201 is axially limited to realize the limited locking of the transmission shaft 2 and the locker 3 .

As a preferred solution of this embodiment, as shown in FIG. 3 , the front end of the transmission shaft body 201 is provided with a second male thread 202 connected with the drill rod 6 .

In this embodiment, the first male thread 102 , the first female thread 203 , the second male thread 202 , the third male thread 30105 and the third female thread 30404 are positive threads.

Example 2:

This embodiment provides a method for using a split-lock two-way transmission device for a coal mine intermediate loading and unloading rod drilling rig. The method uses the split locking two-way transmission device for an underground coal mine intermediate loading and unloading rod drilling rig given in Example 1.

As shown in Figure 13, the usage method specifically includes the following steps:

Step 1, the installation of the power shaft:

After the sealing gasket is installed in the sealing groove 106 of the power shaft 1, the power shaft 1 is connected to the power head 5 of the drilling machine 4 by bolts.

Step 2, installation and locking of drive shaft:

First, connect the transmission shaft 2 and the power shaft 1 through threads, and then adjust the relative position of the adjustment sleeve 302 and the limit sleeve 304 of the locker 3, and use the third sector block 30403 to block the first sector block 30202 to avoid the first The sector-shaped block 30202 moves to the rear under the action of the spring 305; then the locker 3 is inserted from the front end of the transmission shaft 2 to the first positioning boss 30102 of the locker 3 and the positioning section 204 of the transmission shaft 2 and the transmission shaft The shaft shoulders between the body 201 are tight, and the positioning chamber 30104 of the locker 3 is opposite to the arc-shaped positioning groove 103 of the power shaft 1; then turn the adjustment sleeve 302 to displace the first sector-shaped block 30202 and the third sector-shaped block 30403 , under the action of the spring 305, the adjustment sleeve 302 is tightened to the rear, the positioning ball 303 exposes the positioning chamber 30104, and enters the arc-shaped positioning groove 103 of the power shaft 1; finally, the adjustment sleeve 302 is rotated until the first sector block 30202 is locked by the second The two fan-shaped blocks 30402 are blocked.

Step three, the use of two-way transmission:

The two-way transmission device 8 is the split locking two-way transmission device for the middle loading and unloading rod drilling rig in the coal mine; Cooperate with each other to install and disassemble the drill pipe 6, and transmit the forward rotation power and feeding and pulling power of the drilling rig 4 to the bottom of the hole through the two-way transmission device 8 and the drill pipe 6, and the drill pipe 6 drives the drill bit 9 to rotate and break the rock. Carry out drilling 10 construction; during the use of the bidirectional transmission 8, the power shaft 1 and the transmission shaft 2 are always kept in a tight connection state.

Step 4, replacement of drive shaft:

When the second male thread 202 of the drive shaft 2 is worn to the set threshold, firstly rotate the adjustment sleeve 302 until the first sector block 30202 is dislocated by the second sector block 30402, and then pull the adjustment sleeve 302 forward until the first sector block 30202 exceeds the third sector block 30403, turn the adjustment sleeve 302, and use the third sector block 30403 to block the first sector block 30202 to prevent the first sector block 30202 from moving to the rear under the action of the spring 305; secondly, adjust After the sleeve 302 moves forward, the positioning ball 303 retracts from the positioning chamber 30104, the positioning ball 303 breaks away from the arc-shaped positioning groove 103, and the locker is removed; then the threaded connection between the transmission shaft 2 and the power shaft 1 is removed, and the Lower the drive shaft 2; repeat step 2 to install a new drive shaft 2 and lock it.

As a preferred solution of this embodiment, in step 3, the two-way transmission device 8 includes two working conditions: forward rotation transmission and reverse rotation transmission:

Forward rotary transmission working condition:

When the drill pipe 6 is installed or the drilling is carried out, the power head 5 of the drilling rig 4 rotates forward, which drives the power shaft 1 of the two-way transmission device 8 to rotate forward, and the connecting thread between the power shaft 1 and the transmission shaft 2 bears fastening Torque, while the thread between the power shaft 1 and the transmission shaft 2 has already been tightened, and under the action of the first positioning boss 30102 and the positioning ball 303 of the locker 3, the power shaft 1 and the transmission shaft 2 continue to maintain a tight connection state, And forward rotation power is transmitted to the drill pipe 6 connected with the transmission shaft 2, and the connection thread between the transmission shaft 2 and the drill pipe 6 is tightened, or the bottom-hole drill bit 9 is driven to rotate rock breaking.

Reverse rotary transmission working conditions:

When the drill pipe 6 is disassembled, the power head 5 of the drilling rig 4 rotates in the opposite direction, driving the power shaft 1 of the two-way transmission device 8 to rotate in the reverse direction, and the connecting thread between the power shaft 1 and the transmission shaft 2 bears the loosening torque, resulting in a tendency to disengage; The first positioning boss 30102 of the locker 3 and the positioning ball 303 function, the power shaft 1 and the transmission shaft 2 lack the loosening space, and continue to maintain the fastened connection state, and transmit the reverse rotation power to the drill connected to the transmission shaft 2. Rod 6, disconnect the transmission shaft 2 and the connection between the drill pipe 6.

Claims (9)

1. A split locking two-way transmission device for a coal mine intermediate loading and unloading rod drilling rig, characterized in that it includes a power shaft (1) and a transmission shaft (2) connected in sequence, and a power shaft (1) and a transmission shaft (2) The outer casing is provided with a locker (3); The locker (3) includes a locking seat (301), and the locking seat (301) includes a hollow locking shaft (30101), on which the locking shaft (30101) is radially connected and arranged with equal intervals in the circumferential direction. Two or more positioning bins (30104); each positioning bin (30104) is equipped with a positioning ball (303), and the positioning ball (303) can move radially in the positioning bin (30104), and the radial direction of the positioning ball (303) The inner side can be exposed to the locking shaft (30101); The power shaft (1) includes a hollow power shaft (101); the outer surface of the power shaft (101) is provided with an arc-shaped positioning groove (103); the power of the power shaft (1) The shaft body (101) is set inside the locking shaft (30101) until the positioning chamber (30104) is radially aligned with the arc-shaped positioning groove (103), and the radial inner side of the positioning ball (303) can enter the arc-shaped positioning groove (103 ) to realize the positioning and locking of the power shaft (1) and the locker (3); The locking seat (301) is covered with an adjustment sleeve (302) capable of circumferential rotation and axial movement, and the adjustment sleeve (302) includes a hollow adjustment shaft (30201); the adjustment shaft (30201 ) is provided with a circle of third positioning bosses (30204) at the rear of the inner wall, and a circle of arc-shaped limit steps (30203 ), the arc-shaped limit step (30203) can limit the radial movement of the positioning ball (303); The front part of the outer wall of the locking shaft (30101) is equipped with a limit sleeve (304), the limit sleeve (304) is located in the adjustment shaft (30201), and the inside of the adjustment shaft (30201) is installed on the outside of the lock shaft (30101). A spring (305), one end of the spring (305) bears on the limit sleeve (304), and the other end of the spring (305) bears on the third positioning boss (30204). 2. The split locking two-way transmission device for the intermediate loading and unloading rod drilling rig in coal mines according to claim 1, characterized in that, the front part of the inner wall of the adjustment shaft (30201) is provided with equidistant along the circumferential direction. Two or more first sector blocks (30202); the limit sleeve (304) includes a hollow limit shaft (30401), and the outer wall of the limit shaft (30401) is provided with two and Above the second sector-shaped block (30402), the outer wall of the limit shaft (30401) is also provided with two or more third sector-shaped blocks (30403) at equal intervals along the circumference; the second sector-shaped block (30402) is located The rear of the third sector block (30403); the number of the first sector block (30202), the second sector block (30402) and the third sector block (30403) are the same, and the first sector block ( 30202) can cooperate with the second sector-shaped block (30402) and the third sector-shaped block (30403) to block or dislocate, so as to realize the adjustment of the front end stroke of the adjustment sleeve (302). 3. The split locking two-way transmission device for the intermediate loading and unloading rod drilling rig in coal mines according to claim 2, characterized in that, the front part of the outer wall of the locking shaft (30101) is provided with a third male thread (30105), The inner wall of the limit shaft (30401) is provided with a third female thread (30404), and the third male thread (30105) and the third female thread (30404) are matched and installed to realize locking the shaft (30101) and the limit shaft (30401 ) detachable connection lock. 4. The split locking two-way transmission device for the middle loading and unloading rod drilling rig in coal mine according to claim 1, characterized in that, the rear part of the outer wall of the locking shaft (30101) is provided with a second positioning protrusion extending outward The platform (30103), the second positioning boss (30103) is used to limit the rear end stroke of the adjustment sleeve (302). 5. The split locking two-way transmission device for the middle loading and unloading rod drilling rig in coal mine according to claim 1, characterized in that, the front end of the power shaft body (101) is provided with a first male thread (102), and the The rear end of the transmission shaft body (201) is provided with a first female thread (203), and the first male thread (102) and the first female thread (203) are matched and installed to realize the power shaft body (101) and the transmission shaft body ( 201) connection between. 6. The split locking two-way transmission device for the intermediate loading and unloading rod drilling rig in coal mines according to claim 1, characterized in that, the rear end of the power shaft (101) is provided with a power head connected to the drilling rig (4). (5) Connected flange (104); said flange (104) is provided with a group of axially opened bolt holes (105) in the circumferential direction, and the rear end surface of said flange (104) is set There is a sealing groove (106). 7. The split locking two-way transmission device for the intermediate loading and unloading rod drilling rig in coal mine according to claim 1, characterized in that, the transmission shaft (2) comprises a hollow transmission shaft body (201), and the transmission A positioning section (204) is provided on the outer front portion of the shaft body (201), and the outer diameter of the positioning section (204) is smaller than the outer diameter of the transmission shaft body (201); the inner wall front portion of the locking shaft (30101) is provided with The first positioning boss (30102) extending inward, the first positioning boss (30102) is set on the positioning section (204), and the first positioning boss (30102) passes through the positioning section (204) and the transmission shaft body (201 ) between the shaft shoulders for axial limit, to achieve limit locking of the transmission shaft (2) and the locker (3). 8. The split locking two-way transmission device for the intermediate loading and unloading rod drilling rig in coal mines according to claim 1, characterized in that, the front end of the transmission shaft body (201) is provided with a first shaft connected to the drill pipe (6). Two male threads (202). 9. A method for using a split locking two-way transmission device for an intermediate loading and unloading rod drilling rig in a coal mine, characterized in that the method adopts the sub-unit for an intermediate loading and unloading rod drilling rig for an underground coal mine as claimed in any one of claims 1 to 8. Body locking two-way transmission.

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