Anchor rod drilling machine with built-in oil circuit of clamp holder based on axial surface static sealing structure

Abstract

The invention discloses a jumbolter with a clamp built-in oil way based on an axial surface static sealing structure. The jumbolter comprises a jumbolter body, a clamp assembly and a feeding oil cylinder. The jumbolter body comprises an underframe, a carriage, a guide sleeve and a drilling machine, the carriage is mounted on the upper layer of the underframe through the guide sleeve, the drilling machine is mounted on the carriage, and a holder assembly and a feeding oil cylinder are mounted on the lower layer of the underframe. One end of the feeding oil cylinder is installed on the bottom frame, and the other end of the feeding oil cylinder is connected with the clamp holder assembly through a cylinder rod shaft of the feeding oil cylinder. A nested oil pipe is arranged in the feeding oil cylinder to form an inner-layer independent oil way structure and an outer-layer independent oil way structure; the outer-layer oil way independently supplies oil to a feeding oil cylinder through a hydraulic hose, and the inner-layer oil way independently supplies oil to a clamping oil cylinder in the clamp holder assembly based on an axial surface static sealing structure. The jumbolter is internally provided with an oil path, is simple in structure, and solves the problem that an external hydraulic hose hung on a clamp holder is easy to scrape and collide; the axial surface static sealing structure is high in reliability, and safety and efficiency of coal mine construction are improved.

Description

Technical Field

[0001] The present application relates to the technical field of anchor drills for coal mines, and in particular to an anchor drill with a built-in oil circuit in a clamper based on an axial surface static sealing structure. Background Art

[0002] At present, the known coal mine anchor drill clamps all adopt the structure of external hydraulic hose. Since the clamp needs to slide and retract, the hydraulic hose leading to the clamp needs to reserve a long margin to meet the needs of group feeding. During the construction of the anchor drill, the anchor drill needs to rotate and retract. The external oil circuit of the clamp is very easy to interfere with the tunnel wall, causing the main road to break and affecting normal construction.

[0003] Anchor drilling rigs are usually designed with a two-stage telescopic structure. The size of the drilling rig is shorter when it is retracted, and the stroke is longer when it is extended to drill holes. During the operation of the drilling rig, the front clamp needs to be extended to the top of the tunnel first, and it needs to be frequently extended and retracted to adjust the hole position. The suspended pipeline is easy to interfere with the tunnel wall in the narrow tunnel, affecting the construction safety. Summary of the invention

[0004] Purpose: In order to overcome the deficiencies in the prior art, the present invention provides a clamper-built-in oil circuit anchor drilling rig based on an axial surface static sealing structure, so as to avoid collision of external hanging oil pipes and improve the sealing effect of the oil circuit.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: The present application provides an anchor drilling rig with a clamp built-in oil circuit based on an axial surface static sealing structure, comprising an anchor drilling rig body, a clamp assembly and a feed cylinder; The anchor drilling rig body comprises a base frame, a slide, a guide sleeve and a drilling rig. The base frame is a double-layer structure, and the upper layer is equipped with a slide through a guide sleeve. The slide is a telescopic guide mechanism, which slides and retracts with the guide sleeve to extend the drilling stroke. The drilling rig is installed on the slide, and the clamp assembly and the feed cylinder are installed on the lower layer. One end of the feed cylinder is mounted on the base frame, and the other end is connected to the clamp assembly through the cylinder rod shaft of the feed cylinder, and an oil outlet hole is provided at the front end of the cylinder rod shaft; The feed cylinder is provided with nested oil pipes to form an inner and outer two-layer independent oil circuit structure; The outer oil circuit supplies oil to the feed cylinder independently through the hydraulic hose, which is used to drive the extension and retraction of the feed cylinder rod shaft and control the feed and retraction of the gripper assembly; The inner oil circuit supplies oil independently to the clamping cylinder in the clamp assembly based on the axial static seal structure, and is extended and retracted along with the clamp assembly to achieve the clamping and opening of the drill rod of the drilling rig.

[0006] In some embodiments, the clamp assembly includes a frame, a clamp, and a clamping cylinder; The frame body comprises a first vertical plate and a second vertical plate, wherein a mounting hole is formed on the second vertical plate, and the cylinder rod shaft of the feed oil cylinder passes through the mounting hole and is connected to the first vertical plate via a positioning member on the first vertical plate; the positioning member is used to perform axial and radial positioning on the cylinder rod shaft; The clamp is mounted on the first vertical plate; The clamping cylinder is installed between the first vertical plate and the second vertical plate, one end of which is connected to the cylinder rod shaft of the feed cylinder, and the other end is hinged to the clamp for controlling the opening and closing of the clamp.

[0007] During operation, the gripper assembly realizes two independent actions: one is the overall sliding feed, which is driven by the feed cylinder; the other is the clamping and opening of the clamp in the gripper assembly, which is driven by the clamping cylinder.

[0008] In some embodiments, the positioning member on the first vertical plate includes a key and a fastener, the key is used to achieve radial positioning of the cylinder rod shaft, and the fastener is used to achieve axial positioning of the cylinder rod shaft.

[0009] In some embodiments, the second vertical plate is a liquid distribution plate structure, and has a second vertical plate internal oil circuit inside; The second vertical plate is also provided with an axial hole, which is the inlet of the oil circuit; The second vertical plate is also provided with an oil hole which is the outlet of the oil circuit.

[0010] In some embodiments, the shaft hole on the second vertical plate is aligned with the oil outlet hole at the front end of the cylinder rod shaft, and the positions are relatively fixed, so that the inner oil path of the feed oil cylinder is connected to the shaft hole on the second vertical plate through the oil outlet hole at the front end of the cylinder rod shaft of the feed oil cylinder, and then flows to the oil hole of the second vertical plate through the internal oil path of the second vertical plate; A hose is provided at the oil hole on the second vertical plate, which is used to connect the oil path at the oil hole on the second vertical plate to the clamping cylinder.

[0011] Therefore, the inner oil circuit of the feed oil cylinder flows from the oil outlet hole at the front end of the feed oil cylinder rod shaft to the shaft hole on the second vertical plate, flows through the internal oil circuit of the second vertical plate to the oil hole on the second vertical plate, and is connected to the clamping oil cylinder by a hose provided at the oil hole to control the opening and closing of the clamp. Among them, the clamping oil cylinder is a conventional oil cylinder with a simple structure, reliable connection and convenient maintenance.

[0012] In addition, when the clamp assembly feeds and retracts, the oil circuit can follow the retraction and expansion. Therefore, when the inner oil circuit is connected to the clamping cylinder through a hose, the required hose length is shorter, avoiding the situation where the hose is suspended during construction. The hose is not easy to be scratched by the tunnel wall, and the construction safety is high.

[0013] Furthermore, in some embodiments, an axial surface static sealing structure is provided near the axial hole on the second vertical plate and the oil outlet hole at the front end of the cylinder rod shaft, and the inner layer oil circuit of the feed cylinder independently supplies oil to the clamping cylinder in the clamp assembly based on the axial surface static sealing structure; The axial surface static sealing structure comprises a cambered surface sealing ring, and the cambered surface sealing ring is arranged between the oil outlet hole on the cylinder rod shaft and the axial hole on the second vertical plate; The arc surface sealing ring is annular, with a flat bottom structure on the bottom surface, which fits the second vertical plate; the top surface is an arc structure, and the curvature of the top surface fits the cylinder rod axis; The hollow part of the arc surface sealing ring is aligned with the oil outlet hole on the cylinder rod shaft and the shaft hole on the liquid distribution plate.

[0014] In some embodiments, the arc surface sealing ring is 1-2 mm higher than the hole wall.

[0015] In some embodiments, the axial static sealing structure also includes a U-ring and an O-ring, which are arranged between the cylinder rod shaft and the feed cylinder mounting hole on the second vertical plate, and are sequentially sleeved on the cylinder rod shaft, the U-ring is installed on the inner side close to the second vertical plate, and the O-ring is installed on the outer side; a sealing end cover is provided on the outer side of the sealing assembly.

[0016] In some embodiments, the sealing assembly is provided in one or more groups.

[0017] In some embodiments, a V-shaped spring is provided inside the U-shaped ring, and a certain elastic force is reserved to improve the sealing performance.

[0018] In general, the axial surface static sealing structure has three seals: an arc surface sealing ring, a U-ring and an O-ring, and the feed cylinder is fixed to the frame by keys and fasteners, which together realize the static sealing of the clamping oil circuit. Compared with the dynamic seal, the static seal has a simple structure and high reliability.

[0019] Beneficial effects: The clamper based on the axial surface static sealing structure disclosed in the present application has a built-in oil circuit for the anchor drilling rig and a simple structure, which solves the problem of multiple hydraulic pipelines in the clamper and easy scratching of the suspended external hydraulic hose; the three-line axial surface static sealing structure ensures the sealing of the pipeline with high reliability, improves the safety and efficiency of coal mine construction, and expands the adaptability and reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a structural schematic diagram of an anchor drilling rig with a built-in oil circuit in a clamp based on an axial surface static sealing structure in an embodiment of the present invention;

[0022] Figure 2 It is a cross-sectional schematic diagram of the internal oil circuit communication of the anchor drilling rig with internal oil circuit of the clamp based on the axial surface static sealing structure in the embodiment of the present invention;

[0023] Figure 3 is a schematic structural diagram of a clamp assembly in an embodiment of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the sealing structure and oil circuit of the anchor drilling rig with built-in oil circuit in the clamp based on the axial surface static sealing structure in the embodiment of the present invention;

[0025] Figure 5 Schematic diagram of a curved surface sealing ring in an embodiment of the present invention;

[0026] Figure 6 A top view of a curved surface sealing ring in an embodiment of the present invention;

[0027] Figure 7 Schematic diagram of the installation of the arc surface sealing ring in the embodiment of the present invention.

[0028] In the figure: 11 base frame, 12 slide, 13 guide sleeve, 14 drilling rig; 2 clamp assembly, 21 first vertical plate, 22 second vertical plate, 221 oil circuit in the second vertical plate, 222 oil hole on the second vertical plate, 23 clamp, 24 clamping cylinder, 25 mounting hole, 26 fastener, 27 key, 28 hose; 3 feed cylinder, 31 cylinder rod shaft; 41 arc surface sealing ring, 42 U-ring, 43 O-ring, 44 sealing end cover. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use.

[0030] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may also include different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0031] Embodiment 1:

[0032] This embodiment provides a clamper with built-in oil circuit anchor drilling machine based on axial surface static sealing structure, such as Figure 1 , Figure 2 As shown, it includes an anchor drilling machine body, a clamp assembly 2 and a feed cylinder 3; The anchor drilling rig body includes a base frame 11, a slide 12, a guide sleeve 13 and a drilling rig 14. The base frame 11 is a double-layer structure, the upper layer is equipped with the slide 12 through the guide sleeve 13, and the lower layer is equipped with a clamp assembly 2 and a feed cylinder 3 to realize the telescopic clamping function of the clamp; One end of the feed cylinder 3 is mounted on the base frame 11, and the other end is connected to the clamp assembly 2 through the cylinder rod shaft 31 of the feed cylinder 3, and an oil outlet hole is provided at the front end of the cylinder rod shaft 31; The feed cylinder 3 is provided with nested oil pipes to form an inner and outer two-layer independent oil circuit structure; The outer oil circuit supplies oil to the feed oil cylinder 3 independently through the hydraulic hose, which is used to drive the extension and retraction of the feed oil cylinder rod shaft 31 and control the feeding and retreating of the clamp assembly 2; The inner oil circuit independently supplies oil to the clamping oil cylinder 24 in the clamp assembly 2 based on the axial surface static sealing structure, and is extended and retracted along with the clamp assembly 2 to achieve the clamping and opening of the drill rod of the drilling rig 14; The slide 12 is a telescopic guide mechanism, which slides and telescopes along with the guide sleeve 13 to extend the drilling stroke; The drilling rig 14 is installed on the slide 12 to achieve rotary drilling and driving of the drilling rig 14 .

[0033] In this embodiment, the slide 12 is a two-stage telescopic guide mechanism, which can achieve long-stroke drilling after being extended.

[0034] During construction, the clamp assembly 2 is first extended to abut against the tunnel wall to allow the drilling rig 14 to advance, and the drilling rig 14 can connect, change, and pull out the drill rods in coordination with the construction plan.

[0035] In this embodiment, the feed cylinder 3 can drive the clamp assembly 2 to feed and retreat, and control the drilling process of the drilling rig 14; the setting of the slide 12 can extend the drilling formation and expand the operating range of the drilling rig 14; the clamp assembly 2 is connected to the feed cylinder 3, which can reduce vibration and deviation during the operation process and improve the accuracy and safety of drilling.

[0036] Further, in some embodiments, the clamp assembly 2 includes a frame, a clamp 23 and a clamping cylinder 24; The frame body includes a first vertical plate 21 and a second vertical plate 22. The second vertical plate 22 is provided with a mounting hole 25. The cylinder rod shaft 31 of the feed oil cylinder 3 passes through the mounting hole 25 and is connected to the first vertical plate 21 through a positioning piece on the first vertical plate 21. The positioning piece is used to position the cylinder rod shaft 31 axially and radially. The clamp 23 is installed on the first vertical plate 21; The clamping cylinder 24 is installed between the first vertical plate 21 and the second vertical plate 22 , one end of which is connected to the cylinder rod shaft 31 of the feed cylinder 3 , and the other end is hinged to the clamp 23 for controlling the opening and closing of the clamp 23 .

[0037] In some embodiments, the positioning member on the first vertical plate 21 includes a key 27 and a fastener 26 , wherein the key 27 is used to achieve radial positioning of the cylinder rod shaft 31 , and the fastener 26 is used to achieve axial positioning of the cylinder rod shaft 31 .

[0038] In this embodiment, the fastener 26 is a bolt, and the key 27 is a flat key.

[0039] The optimized design of the clamp assembly 2, especially the use of positioning parts, ensures the radial and axial positioning accuracy of the cylinder rod shaft 31, avoids deviation or looseness during operation, and improves the stability and reliability of clamping; the structure is simple and easy to maintain, reducing the downtime of the equipment.

[0040] Embodiment 2:

[0041] Based on the first embodiment, the structure of the feed cylinder 3 is optimized in this embodiment.

[0042] Specifically, Figure 3 , Figure 4 As shown, the feed cylinder 3 is provided with nested oil pipes inside, forming an inner and outer two-layer independent oil circuit structure; The outer oil circuit supplies oil to the feed oil cylinder 3 independently, which is used to drive the extension and retraction of the cylinder rod shaft 31 and control the feeding and retreating of the clamp assembly 2; The inner oil circuit supplies oil to the clamping oil cylinder 24 independently, and is extended and retracted along with the clamp assembly 2, so as to control the opening and closing of the clamp 23, thereby achieving the clamping and opening of the drill rod of the drilling rig 14.

[0043] In the inner and outer two-layer independent oil circuit structure, the inner oil circuit is realized by a nested steel oil pipe. When the clamp assembly 2 is fed and retracted, the oil circuit follows the retraction to meet the independent oil supply of the clamping cylinder 24 of the clamp.

[0044] In some embodiments, the second vertical plate 22 is a liquid distribution plate structure, and has a second vertical plate internal oil circuit 221 inside; The second vertical plate 22 is provided with an axial hole, which is the inlet of the oil circuit; The second vertical plate 22 is provided with an oil hole, which is the outlet of the oil circuit.

[0045] In some embodiments, the shaft hole on the second vertical plate 22 is aligned with the oil outlet hole at the front end of the cylinder rod shaft 31, and the positions are relatively fixed, so that the inner layer oil path of the feed oil cylinder 3 is connected to the shaft hole on the second vertical plate 22 through the oil outlet hole at the front end of the cylinder rod shaft of the feed oil cylinder, and then flows to the oil hole on the second vertical plate 22 through the oil path 221 in the second vertical plate; A hose 28 is provided at the oiling hole 222 of the second vertical plate, and is used to connect the oil path at the oiling hole 222 of the second vertical plate to the clamping cylinder 24 .

[0046] The inner oil circuit of the feed oil cylinder 3 flows from the oil outlet hole at the front end of the feed oil cylinder rod shaft 31 to the shaft hole on the second vertical plate 22, flows through the second vertical plate inner oil circuit 221 to the oil hole on the second vertical plate 22, and is connected to the clamping oil cylinder 24 through the hose 28 provided at the oil hole to control the opening and closing of the clamp 23. Among them, the clamping oil cylinder 24 is a conventional oil cylinder.

[0047] The liquid distribution plate structure of the second vertical plate 22 provides an oil circuit interface, and different sizes can be selected according to actual needs to meet the use requirements of different types of oil cylinders. In addition, when the clamp assembly 2 is fed and retracted, the oil circuit can follow the retraction, so when the inner oil circuit is connected to the clamping oil cylinder 24 through the hose 28, the required length of the hose 28 is shorter, avoiding the situation of the hose hanging during the construction process, and the hose is not easy to be scraped against the tunnel wall, and the construction safety is high.

[0048] During operation, first press the clamp feed control button, the outer oil circuit of the feed cylinder 3 is connected, and the cylinder rod shaft 31 is pushed out, so that the clamp assembly 2 fixed at the front end of the cylinder rod shaft 31 slides forward to reach a predetermined position, and the drill box of the drilling rig 14 drives the drill rod of the drilling rig 14 to rotate and drill under the drive of the two-stage sliding carriage 12, and the clamp 23 cooperates with the drilling rig 14 to perform auxiliary work such as changing rods.

[0049] This embodiment realizes independent oil supply of the feed cylinder 3 and the clamping cylinder 24 through the design of independent inner and outer oil circuits, avoids interference between the oil circuits, avoids scratching of the hanging external hose, and improves the stability and response speed of the hydraulic system. The outer oil circuit controls the extension and contraction of the clamp assembly 2, and the inner oil circuit controls the opening and closing of the clamp 23, so that the feeding and clamping operations of the drilling rig 14 can be performed synchronously, improving the working efficiency.

[0050] Embodiment three:

[0051] On the basis of the first and second embodiments, this embodiment adds a static sealing structure in the anchor drilling rig with a built-in oil circuit in the clamp based on the axial surface static sealing structure.

[0052] Specifically, Figures 4 to 7 As shown, An axial surface static sealing structure is provided near the axial hole on the second vertical plate 22 and the oil outlet hole at the front end of the cylinder rod shaft 31. The axial surface static sealing structure includes a curved surface sealing ring 41. The curved surface sealing ring 41 is provided between the oil outlet hole on the cylinder rod shaft 31 and the axial hole on the second vertical plate 22. The arc surface sealing ring 41 is annular, with a flat bottom structure, which fits the second vertical plate 22 for easy installation; the top surface is an arc structure, and the curvature of the top surface fits the cylinder rod shaft 31; the hollow part of the arc surface sealing ring 41 is aligned with the oil hole on the cylinder rod shaft 31 and the shaft hole on the liquid distribution plate.

[0053] In some embodiments, the height of the arc surface sealing ring 41 is 1-2 mm higher than the hole wall so that there is a certain compression during installation to ensure the sealing performance.

[0054] During installation, the cylinder rod shaft 31 is inserted into the arc surface portion of the arc surface sealing ring 41 to ensure that the hollow portion of the arc surface sealing ring 41 coincides with the oil passage.

[0055] In some embodiments, the axial static sealing structure also includes a U-ring 42 and an O-ring 43, which are arranged between the cylinder rod shaft 31 and the feed cylinder mounting hole on the second vertical plate 22, and are sequentially sleeved on the cylinder rod shaft 31, the U-ring 42 is installed on the inner side close to the second vertical plate 22, and the O-ring 43 is installed on the outer side; a sealing end cover 44 is provided on the outer side of the sealing assembly.

[0056] The provision of the sealing end cover 44 further improves the sealing performance and is convenient for assembly and disassembly, maintenance and repair.

[0057] In some embodiments, the sealing assembly is provided in one or more groups.

[0058] In this embodiment, there are two groups of sealing components, which are respectively arranged on both sides of the arc surface sealing ring 41.

[0059] In some embodiments, a V-shaped spring is provided inside the U-shaped ring 42 and a certain elastic force is reserved to improve the sealing performance.

[0060] In this embodiment, three sealing structures are used near the oil hole: an arcuate sealing ring, a U-shaped ring and an O-ring; the arcuate sealing ring is installed around the oil hole, which is the first sealing structure; the second sealing design is a U-shaped ring, and a V-shaped spring is added inside to tighten the seal and compensate; the outermost third seal is an O-ring structure, which further improves the sealing performance.

[0061] The three-seal structure ensures the tightness of the oil circuit, prevents oil leakage, and prolongs the service life of the equipment; the setting of the sealing end cover is convenient for disassembly and assembly. In addition, the structure of the liquid distribution plate on the second vertical plate 22 and the connection of the hose simplify the layout of the oil circuit, which is convenient for maintenance and overhaul.

[0062] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only used to explain the relative position relationship, movement, etc. between the components in a certain posture. If the specific posture changes, the directional indication will also change accordingly. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0063] In addition, the terms "first", "second", etc. 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", "second", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0064] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 indirectly connected 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 this application can be understood by specific circumstances.

[0065] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An anchor drilling rig with a built-in oil circuit in the clamp based on an axial surface static seal structure, characterized in that: It includes an anchor drilling machine body, a clamp assembly and a feed cylinder; The anchor drilling rig body comprises a base frame, a slide, a guide sleeve and a drilling rig, wherein the base frame is a double-layer structure, the upper layer is provided with a slide through a guide sleeve, the drilling rig is provided on the slide, and the lower layer is provided with a clamp assembly and a feed cylinder; One end of the feed cylinder is mounted on the base frame, and the other end is connected to the clamp assembly through the cylinder rod shaft of the feed cylinder, and an oil outlet hole is provided at the front end of the cylinder rod shaft; The feed cylinder is provided with nested oil pipes to form an inner and outer two-layer independent oil circuit structure; The outer oil circuit supplies oil to the feed cylinder independently through the hydraulic hose, which is used to drive the extension and retraction of the feed cylinder rod shaft and control the feed and retraction of the gripper assembly; The inner oil circuit supplies oil independently to the clamping cylinder in the clamp assembly based on the axial static seal structure, and is extended and retracted along with the clamp assembly to achieve the clamping and opening of the drill rod of the drilling rig.

2. The anchor drilling rig with built-in oil circuit in the clamp based on the axial surface static sealing structure according to claim 1, characterized in that: The clamp assembly includes a frame, a clamp and a clamping cylinder; The frame body comprises a first vertical plate and a second vertical plate, wherein a mounting hole is formed on the second vertical plate, and the cylinder rod shaft of the feed oil cylinder passes through the mounting hole and is connected to the first vertical plate via a positioning member on the first vertical plate; the positioning member is used to perform axial and radial positioning on the cylinder rod shaft; The clamp is mounted on the first vertical plate; The clamping cylinder is installed between the first vertical plate and the second vertical plate, one end of which is connected to the cylinder rod shaft of the feed cylinder, and the other end is hinged to the clamp for controlling the opening and closing of the clamp.

3. The anchor drilling rig with built-in oil circuit in the clamp based on the axial surface static sealing structure according to claim 2, characterized in that: The positioning member on the first vertical plate includes a key and a fastener, wherein the key is used to realize radial positioning of the cylinder rod shaft, and the fastener is used to realize axial positioning of the cylinder rod shaft.

4. The anchor drilling rig with built-in oil circuit in the clamp based on the axial surface static sealing structure according to claim 2, characterized in that: The second vertical plate is a liquid distribution plate structure, and has a second vertical plate internal oil circuit inside; The second vertical plate is also provided with an axial hole, which is the inlet of the oil circuit; The second vertical plate is also provided with an oil hole which is the outlet of the oil circuit.

5. The anchor drilling rig with built-in oil circuit in the clamp based on the axial surface static sealing structure according to claim 4, characterized in that: The shaft hole on the second vertical plate is aligned with the oil outlet hole at the front end of the cylinder rod shaft, and the position is relatively fixed, so that the inner oil path of the feed cylinder is connected to the shaft hole on the second vertical plate through the oil outlet hole at the front end of the cylinder rod shaft of the feed cylinder, and then flows to the oil hole on the second vertical plate through the internal oil path of the second vertical plate; A hose is provided at the oil hole on the second vertical plate, which is used to connect the oil path at the oil hole on the second vertical plate to the clamping cylinder.

6. The anchor drilling rig with built-in oil circuit in the clamp based on the axial surface static sealing structure according to claim 5, characterized in that: An axial surface static sealing structure is provided near the axial hole on the second vertical plate and the oil outlet hole at the front end of the cylinder rod shaft, including a curved surface sealing ring, and the curved surface sealing ring is arranged between the oil outlet hole on the cylinder rod shaft and the axial hole on the second vertical plate; The arc surface sealing ring is annular, and the bottom surface is a flat bottom structure, which fits the second vertical plate; The top surface is an arc-shaped structure, and the curvature of the top surface fits the cylinder rod axis; The hollow part of the arc surface sealing ring is aligned with the oil outlet hole on the cylinder rod shaft and the shaft hole on the liquid distribution plate.

7. The anchor drilling rig with built-in oil circuit in the clamp based on the axial surface static sealing structure according to claim 6, characterized in that: The height of the arc surface sealing ring is 1-2 mm higher than the hole wall.

8. The anchor drilling rig with built-in oil circuit in the clamp based on the axial surface static sealing structure according to claim 6, characterized in that: The axial static sealing structure also includes a U-ring and an O-ring, which are arranged between the cylinder rod shaft and the feed cylinder mounting hole on the second vertical plate, and are sequentially sleeved on the cylinder rod shaft, the U-ring is installed on the inner side close to the second vertical plate, and the O-ring is installed on the outer side; a sealing end cover is provided on the outer side of the sealing assembly.

9. The anchor drilling machine with built-in oil circuit in the clamp based on the axial surface static sealing structure according to claim 8, characterized in that: The sealing components are provided in one or more groups.

10. The anchor drilling machine with built-in oil circuit in the clamp based on the axial surface static sealing structure according to claim 8, characterized in that: A V-shaped spring is arranged inside the U-shaped ring, and a certain elastic force is reserved to improve the sealing performance.

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