A propulsion beam assembly with roller chain tensioning mechanism

Abstract

The present invention relates to a propulsion beam assembly with a roller chain tensioning mechanism, comprising a guide rail, a propulsion assembly, a hose reel, a rotator, a slide plate assembly and a high-pressure down-the-hole impactor, wherein the propulsion assembly is fixed at one end of the guide rail, the tensioning mechanism comprises a tensioning frame and a hydraulic cylinder, a tensioning sprocket is slidably arranged on the tensioning frame, one end of the hydraulic cylinder is connected to the tensioning sprocket, and the other end is fixed to the tensioning frame through a spring, a roller chain and a fixed chain assembly are also arranged between the propulsion assembly and the tensioning sprocket, the slide plate assembly is slidably arranged on the guide rail, the hose reel and the rotator are fixed on the slide plate assembly, the high-pressure down-the-hole impactor is connected to the rotator through a tapered drill rod and a floating joint, a drill rod warehouse is also arranged on one side of the guide rail, and a connecting rod mechanism is also arranged on the guide rail, and a rod unloading mechanism is also fixed at the front end of the guide rail, and the automatic replacement of the tapered drill rod can be completed through the cooperation of the unloading rod mechanism, the connecting rod mechanism and the drill rod warehouse. The structure can automatically change the rod, and the sprocket tensioning operation is convenient, and the overall service life is long.

Description

Technical Field

[0001] The invention relates to the technical field of down-the-hole drilling rig structures, and in particular to a propulsion beam assembly with a roller chain tensioning mechanism. Background Art

[0002] Down-the-hole drills are commonly used equipment in mining projects. Their propulsion system includes guide rails and guide plates arranged on the guide rails. The power mechanism is arranged on the guide plate. The power output shaft of the power mechanism is coaxially connected to the drill rod. When the power output shaft of the power mechanism rotates, it drives the drill rod to perform drilling action, and the guide plate moves along the guide rail to complete the propulsion and exit actions.

[0003] Most of the drilling rig propulsion mechanisms use chains to drag the slide assembly to make reciprocating motions to complete the feeding of the drilling rig. The chain will become loose after a period of use and needs to be tightened. Most of the existing chain transmission systems use an adjustment screw to adjust the tightness of the chain. During the use of this screw adjustment method, on the one hand, the adjustment screw will rotate under the action of tension, so it is necessary to take anti-rotation structural measures on the adjustment nut; on the other hand, the adjustment stroke of the adjustment screw is short, resulting in the adjustment stroke not being in place; in addition, this structure is not convenient during the adjustment operation.

[0004] In addition, the drill rods of some down-the-hole drills today are long and heavy. In the process of replacing the drill rods, more than two people are required to lift and support the drill rods to complete the rod replacement operation, which has a high labor intensity. During the lifting process, the drill rods are likely to bring dangers and hidden dangers to the personal safety of workers. At the same time, in the process of down-the-hole drilling, the drill rods need to be replaced repeatedly many times to meet the drilling depth requirements. The labor intensity of the workers is high, and the drill rods are prone to tipping over and injuring people when they are erected for docking, which brings hidden dangers to production safety work. In addition, it takes a long time to change the drill rods by manually lifting and supporting the drill rods, which affects the efficiency of the down-the-hole drilling operation. Summary of the invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a propulsion beam assembly with a roller chain tensioning mechanism, which can automatically change rods and is easy to operate for sprocket tensioning, thereby extending the overall service life.

[0006] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0007] A propulsion beam assembly with a roller chain tensioning mechanism, comprising a guide rail, a propulsion assembly, a hose reel, a rotator, a slide assembly and a high-pressure down-the-hole impactor, wherein the propulsion assembly is fixed at one end of the guide rail, a tensioning sprocket is arranged at the front end of the guide rail through a tensioning mechanism, the tensioning mechanism comprises a tensioning frame and a hydraulic cylinder, the tensioning sprocket is slidably arranged on the tensioning frame, one end of the hydraulic cylinder is connected to the tensioning sprocket, and the other end is fixed to the tensioning frame through a spring, and a roller chain and a hydraulic cylinder are also arranged between the propulsion assembly and the tensioning sprocket. A fixed chain assembly, the slide plate assembly is slidably arranged on the guide rail and is connected to the roller chain and the fixed chain assembly, the hose reel and the rotator are fixed on the slide plate assembly, the high wind pressure down-the-hole impactor is connected to the rotator through a tapered drill rod and a floating joint, a drill rod warehouse is also provided on one side of the guide rail, and a connecting rod mechanism is also provided at a position near both ends of the drill rod warehouse on the guide rail, and a rod unloading mechanism is also fixed to the front end of the guide rail, and the automatic replacement of the tapered drill rod can be completed through the cooperation of the rod unloading mechanism, the connecting rod mechanism and the drill rod warehouse.

[0008] As a preferred embodiment, the hydraulic cylinder includes a hydraulic cylinder body and a piston rod. The hydraulic cylinder body is inserted into one end face of the tensioning frame. The spring sleeve is arranged outside the hydraulic cylinder body, and one end of the spring sleeve abuts against the outer flange of the hydraulic cylinder body, and the other end abuts against the end face of the tensioning frame. The piston rod is inserted into the hydraulic cylinder body, and a sprocket frame is fixed to one end of the piston rod.

[0009] As a preferred solution, the tensioning sprocket is tightly sleeved on the bearing, and retaining rings are provided on both sides of the tensioning sprocket on the bearing, the inner ring of the bearing is tightly sleeved on the pin shaft, and both ends of the pin shaft are inserted and fixed on the sprocket frame.

[0010] As a preferred solution, a blind hole is provided at one end of the pin shaft, an oil filling bolt is provided in the blind hole, and a spring washer is provided between the oil filling bolt and the blind hole, and a straight oil cup is also provided on the outer side of the oil filling bolt.

[0011] As a preferred solution, one end of the hydraulic cylinder body is connected to a refueling conduit via a joint, and the refueling conduit is connected to the oil cup via a tensioning refueling seat.

[0012] As a preferred solution, the sprocket frame is U-shaped as a whole, and a chain-off preventing baffle is fixed on the upper end surface of the sprocket frame.

[0013] As a preferred solution, a transition joint A is further provided between the tapered drill rod and the floating joint, and a transition joint B is further provided between the tapered drill rod and the high-pressure down-the-hole impactor.

[0014] As a preferred solution, a drill rod baffle is further provided on one end of the guide rail located at the rod unloading mechanism, and a front dust collecting device is further provided on the high air pressure down-the-hole impactor.

[0015] As a preferred solution, a protection frame is also fixed on the guide rail, and the protection frame is arranged around the cone drill rod and the periphery of the drill rod warehouse.

[0016] As a preferred solution, the guide rail is also fixed with a slide valve group, a hose bracket, a hose transition piece, a propulsion double balance valve group and a hose transition frame; the guide rail is also provided with a limit plate for limiting the front and rear position of the slide plate assembly.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] After all the components of the propulsion beam of the present invention are assembled, it is only necessary to inject lubricating oil into the hydraulic cylinder in the tensioning device, and the piston rod will extend, and the chain will be easily tightened. At the same time, the tensioning device is equipped with a tensioning spring with a pre-tightening force to play a buffering and adhesion role. During the drilling process, the propulsion motor rotates forward, and the slide plate assembly is pulled forward by the propulsion sprocket, roller chain, and tensioning sprocket. Due to the action of the tensioning spring with a pre-tightening force, the mechanism can absorb the alternating vibration load transmitted by the impactor along the drill rod, thereby protecting the propulsion motor and the entire propulsion beam system. In addition, the guide rail of the present invention is provided with a rod unloading mechanism, a rod connecting mechanism and a drill rod warehouse. Through the cooperation of the three, the replacement of the tapered drill rod can be easily and automatically completed, and manual intervention is no longer required, which reduces safety hazards and saves labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation on the present application.

[0020] Figure 1 It is a structural schematic diagram of the propulsion beam assembly of the present invention;

[0021] Figure 2 is a schematic cross-sectional structure diagram of the propulsion beam assembly of the present invention;

[0022] Figure 3 is an exploded structural schematic diagram of the propulsion beam assembly of the present invention;

[0023] Figure 4 It is a schematic diagram of the overall structure of the tensioning mechanism of the present invention;

[0024] Figure 5 It is a schematic diagram of the explosion structure of the tensioning mechanism of the present invention;

[0025] Figure 6 It is a structural schematic diagram of the tensioning assembly of the present invention;

[0026] Figure 7 It is a schematic diagram of the cross-sectional structure of the tensioning assembly of the present invention.

[0027] The accompanying drawings are marked as follows: 1. guide rail; 101. guide rail bar A; 102. guide rail bar B; 103. guide rail bar C; 104. transition reinforcement plate A; 105. transition reinforcement plate B; 106. hose transition frame; 107. dust collecting cylinder seat; 108. chain guard plate; 109. compensation cylinder seat; 2. tensioning mechanism; 21. tensioning frame; 221. hydraulic cylinder body; 222. piston rod; 2221. sealing ring; 223. sprocket frame; 224. spring; 225. mounting seat; 23. tensioning sprocket; 231. bearing; 232. retaining ring; 233. spacer; 24. pin shaft; 241. spring washer; 242. oil filling bolt; 243. straight oil cup; 25. anti-chain derailment baffle; 26. joint; 27. add Oil guide tube; 28, tensioner and oiling seat; 29, oil cup; 3, slide valve group; 4, hose bracket; 5, connecting rod mechanism; 6, hose transition piece; 7, propulsion assembly; 71, propulsion double balance valve group; 72, limit plate; 81, roller chain; 82, fixed chain assembly; 9, hose reel; 10, rotator; 11, slide plate assembly; 121, floating joint; 122, transition joint A; 123, cone drill rod; 124, transition joint B; 125, high wind pressure down-the-hole impactor; 13, drill rod warehouse; 131, inclination sensor; 132, proximity sensor; 14, protection frame; 15, drill rod baffle; 16, unloading rod mechanism; 161, unloading rod sensor assembly; 17, front dust collection device; 18, front positioning block. DETAILED DESCRIPTION

[0028] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0030] In addition, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0035] like Figures 1 to 7As shown, a propulsion beam assembly with a roller chain tensioning mechanism includes a guide rail 1, a propulsion assembly 7, a hose reel 9, a rotator 10, a slide assembly 11 and a high-pressure down-the-hole impactor 125. The propulsion assembly 7 is fixed to one end of the guide rail 1. The front end of the guide rail 1 is provided with a tensioning sprocket 23 through a tensioning mechanism 2. The tensioning mechanism 2 includes a tensioning frame 21 and a hydraulic cylinder. The tensioning sprocket 23 is slidably arranged on the tensioning frame 21. One end of the hydraulic cylinder is connected to the tensioning sprocket 23, and the other end is fixed to the tensioning frame 21 through a spring 224. A roller chain 81 and a fixed spring 224 are also provided between the propulsion assembly 7 and the tensioning sprocket 23. The fixed chain assembly 82, the slide plate assembly 11 is slidably set on the guide rail 1, and is connected to the roller chain 81 and the fixed chain assembly 82, the hose reel 9 and the rotator 10 are fixed on the slide plate assembly, the high wind pressure down-the-hole impactor 125 is connected to the rotator 10 through the tapered drill rod 123 and the floating joint 121, a drill rod warehouse 13 is also provided on one side of the guide rail 1, and a connecting rod mechanism 5 is also provided on the guide rail 1 near the two ends of the drill rod warehouse 13, and a rod unloading mechanism 16 is also fixed at the front end of the guide rail 1, and the automatic replacement of the tapered drill rod 123 can be completed through the cooperation of the rod unloading mechanism 16, the connecting rod mechanism 5 and the drill rod warehouse 13.

[0036] The hydraulic cylinder includes a hydraulic cylinder body 221 and a piston rod 222. The hydraulic cylinder body 221 is inserted into one end surface of the tensioning frame 21. The spring 224 is sleeved outside the hydraulic cylinder body 221, and one end of the spring is against the outer flange of the hydraulic cylinder body 221, and the other end is against the end surface of the tensioning frame 21. A mounting seat 225 is also provided between the spring 224 and the end surface of the tensioning frame 21. The piston rod 222 is inserted into the hydraulic cylinder body 221. A plurality of sealing rings 2221 are provided on the inner side wall of the opening of the hydraulic cylinder body 221. The sealing rings 2221 are against the piston rod to prevent leakage of hydraulic oil.

[0037] A sprocket frame 223 is fixed to one end of the piston rod 222. The sprocket frame 223 is U-shaped as a whole, and a chain-off prevention baffle 25 is fixed to the upper end surface of the sprocket frame 223. A refueling conduit 27 is connected to one end of the hydraulic cylinder body 221 through a joint 26. The refueling conduit 27 is connected to an oil cup 29 through a tensioning refueling seat 28.

[0038] The tensioning sprocket 23 is tightly sleeved on the bearing 231, and a retaining ring 232 is provided on both sides of the tensioning sprocket 23 on the bearing 231. The inner ring of the bearing 231 is tightly sleeved on the pin shaft 24. The two ends of the pin shaft 24 are inserted and fixed on the sprocket frame 223. The pin shaft 24 is also provided with a spacer 233.

[0039] The bearing is a double-row cylindrical roller bearing, one end of the pin shaft 24 is provided with a blind hole, an oil injection bolt 242 is provided in the blind hole, and a spring washer 241 is provided between the oil injection bolt 242 and the blind hole, and a straight oil cup 243 is also provided on the outside of the oil injection bolt 242. The side wall of the pin shaft is also provided with a through hole connected to the blind hole, and the oil injection bolt 242 can introduce lubricating oil into the double-row cylindrical roller bearing, increase the lubrication of the inner and outer rings of the bearing, and ensure the stable operation of the sprocket.

[0040] A slide groove is provided on the side wall of one end of the tensioning frame 21, and the pin shaft 24 extends into the slide groove.

[0041] A transition joint A122 is further provided between the tapered drill rod 123 and the floating joint 121 , and a transition joint B124 is further provided between the tapered drill rod 123 and the high-pressure down-the-hole impactor 125 .

[0042] A drill rod baffle 15 is also provided on one end of the guide rail 1 at the rod unloading mechanism 16, and a front dust collecting device 17 is also provided on the high wind pressure down-the-hole impactor 125. A protection frame 14 is also fixed on the guide rail 1, and the protection frame 14 is arranged around the cone drill rod 123 and the outer periphery of the drill rod storage 13. An inclination sensor 131 and a proximity sensor 132 are respectively provided at both ends of the drill rod storage 13, and a rod unloading sensor assembly 161 is also provided on the guide rail 1.

[0043] The guide rail 1 is also fixed with a slide valve group 3, a hose bracket 4, a hose transition piece 6, a propulsion double balance valve group 71 and a hose transition frame 106; the guide rail 1 is also provided with a limit plate 72 for limiting the front and rear positions of the slide assembly 11.

[0044] The upper and lower ends of the side wall of the guide rail 1 are respectively provided with a guide rail bar B102 and a guide rail bar C103, and the front end of the guide rail 1 is also provided with a guide rail bar A101. The front end of the guide rail 1 is provided with a front end positioning block 18, and the two sides of the front end of the guide rail 1 are respectively fixed with a transition reinforcement plate A104 and a transition reinforcement plate B105, and the upper part of the guide rail 1 is also fixed with a chain guard plate 108, and the lower part of the guide rail 1 is also fixed with a dust collecting cylinder seat 107 and a compensation cylinder seat 109.

[0045] After all components of the propulsion beam of the present invention are assembled, it is only necessary to add grease to the oil cup with a grease gun, and the hydraulic cylinder in the tensioning device extends, and the chain is easily tightened. At the same time, the tensioning device is equipped with a tensioning spring with a pre-tightening force to play a buffering and clinging role. At the same time, the oil cup can be set at a convenient position for refueling by setting the refueling conduit 27.

[0046] During drilling, the propulsion motor rotates forward, and the slide assembly is pulled forward through the propulsion sprocket, roller chain, and tension sprocket. Due to the action of the tension spring with preload, the mechanism can absorb the alternating vibration load transmitted from the impactor along the drill pipe, thereby protecting the propulsion motor and the entire propulsion beam system.

[0047] The roller chain of the present invention is reliable in tensioning and easy to operate; it can effectively absorb the alternating vibration load transmitted by the impactor along the drill rod, thereby increasing the life of the drilling rig. In addition, the guide rail of the present invention is provided with a rod unloading mechanism, a rod connecting mechanism and a drill rod warehouse, through which the replacement of the tapered drill rod can be easily and automatically completed, and manual intervention is no longer required, thereby reducing safety hazards and saving labor costs.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0049] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A propulsion beam assembly with a roller chain tensioning mechanism, characterized in that: The invention comprises a guide rail (1), a propulsion assembly (7), a hose reel (9), a rotator (10), a slide plate assembly (11) and a high-pressure down-the-hole impactor (125), wherein the propulsion assembly (7) is fixed at one end of the guide rail (1), a tensioning sprocket (23) is arranged at the front end of the guide rail (1) through a tensioning mechanism (2), the tensioning mechanism (2) comprises a tensioning frame (21) and a hydraulic cylinder, the tensioning sprocket (23) is slidably arranged on the tensioning frame (21), one end of the hydraulic cylinder is connected to the tensioning sprocket (23), and the other end is fixed to the tensioning frame (21) through a spring (224), a roller chain (81) and a fixed chain assembly (82) are also arranged between the propulsion assembly (7) and the tensioning sprocket (23), and the tensioning mechanism (2) comprises a tensioning frame (21) and a hydraulic cylinder. The slide plate assembly (11) is slidably arranged on the guide rail (1) and is connected to the roller chain (81) and the fixed chain assembly (82); the hose reel (9) and the rotator (10) are fixed on the slide plate assembly; the high wind pressure down-the-hole impactor (125) is connected to the rotator (10) via a tapered drill rod (123) and a floating joint (121); a drill rod warehouse (13) is also arranged on one side of the guide rail (1); and a connecting rod mechanism (5) is also arranged on the guide rail (1) near both ends of the drill rod warehouse (13); a rod unloading mechanism (16) is also fixed at the front end of the guide rail (1); and the automatic replacement of the tapered drill rod (123) can be completed through the cooperation of the rod unloading mechanism (16), the connecting rod mechanism (5) and the drill rod warehouse (13).

2. A propulsion beam assembly with a roller chain tensioning mechanism according to claim 1, characterized in that: The hydraulic cylinder comprises a hydraulic cylinder body (221) and a piston rod (222); the hydraulic cylinder body (221) is inserted into one end surface of a tension frame (21); the spring (224) is sleeved outside the hydraulic cylinder body (221), with one end of the spring abutting against the outer flange of the hydraulic cylinder body (221) and the other end abutting against the end surface of the tension frame (21); the piston rod (222) is inserted into the hydraulic cylinder body (221), and a sprocket frame (223) is fixed to one end of the piston rod (222).

3. A propulsion beam assembly with a roller chain tensioning mechanism according to claim 2, characterized in that: The tensioning sprocket (23) is tightly sleeved on the bearing (231), and retaining rings (232) are provided on both sides of the tensioning sprocket (23) on the bearing (231). The inner ring of the bearing (231) is tightly sleeved on the pin shaft (24), and the two ends of the pin shaft (24) are inserted and fixed on the sprocket frame (223).

4. A propulsion beam assembly with a roller chain tensioning mechanism according to claim 3, characterized in that: A blind hole is provided at one end of the pin shaft (24), an oil injection bolt (242) is provided in the blind hole, a spring washer (241) is provided between the oil injection bolt (242) and the blind hole, and a straight oil cup (243) is also provided on the outer side of the oil injection bolt (242).

5. The propulsion beam assembly with roller chain tensioning mechanism according to claim 2, characterized in that: One end of the hydraulic cylinder body (221) is connected to a refueling conduit (27) via a joint (26), and the refueling conduit (27) is connected to an oil cup (29) via a tensioning refueling seat (28).

6. A propulsion beam assembly with a roller chain tensioning mechanism according to claim 2, characterized in that: The sprocket frame (223) is U-shaped as a whole, and a chain-off preventing baffle (25) is fixed on the upper end surface of the sprocket frame (223).

7. The propulsion beam assembly with roller chain tensioning mechanism according to claim 1, characterized in that: A transition joint A (122) is also provided between the tapered drill rod (123) and the floating joint (121), and a transition joint B (124) is also provided between the tapered drill rod (123) and the high-pressure down-the-hole impactor (125).

8. The propulsion beam assembly with roller chain tensioning mechanism according to claim 1, characterized in that: A drill rod baffle (15) is also provided on one end of the guide rail (1) located at the rod unloading mechanism (16), and a front dust collecting device (17) is also provided on the high-pressure down-the-hole impactor (125).

9. The propulsion beam assembly with roller chain tensioning mechanism according to claim 1, characterized in that: A protection frame (14) is also fixed on the guide rail (1), and the protection frame (14) is arranged around the cone drill rod (123) and the periphery of the drill rod storage (13).

10. The propulsion beam assembly with roller chain tensioning mechanism according to claim 1, characterized in that: The guide rail (1) is also fixed with a slide valve group (3), a hose bracket (4), a hose transition piece (6), a propulsion double balance valve group (71) and a hose transition frame (106); the guide rail (1) is also provided with a limit plate (72) for limiting the front and rear positions of the slide plate assembly (11).

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