Telescopic boom structure of hydraulic drill carriage

Abstract

The utility model discloses a telescopic boom structure of a hydraulic drill carriage, which comprises a mounting plate, the mounting plate is fixedly mounted on a rotary platform of the hydraulic drill carriage, a first telescopic boom is fixedly mounted on the upper surface of the mounting plate, a second telescopic boom is slidably mounted in the first telescopic boom, and a third telescopic boom is slidably mounted in the second telescopic boom. A pushing mechanism is fixedly mounted in the mounting plate, and the pushing end of the pushing mechanism penetrates through the first telescopic arm in a sliding mode to be fixedly connected with the lower surface of the second telescopic arm and the lower surface of the third telescopic arm. Through hierarchical control, the system can dynamically adjust the rigidity distribution of the cantilever structure according to the drilling depth, the last-stage arm (the third telescopic arm) is preferentially used during short-stroke operation, the load is concentrated on the base arm (the first telescopic arm) with the strongest rigidity, the ratio (extension length / length of the base arm) of the cantilever is reduced by 40%, and then bending deformation can be remarkably reduced.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic drilling rig technology, specifically to a telescopic boom structure for a hydraulic drilling rig. Background Technology

[0002] In mining, tunneling and other engineering operations, hydraulic drilling rigs have become key equipment due to their efficient and precise drilling capabilities, and the telescopic boom, as its core execution component, directly affects the work efficiency and drilling accuracy.

[0003] In existing hydraulic drilling rigs, when driving the telescopic boom for pushing operations, the extension lengths of the first, second, and third telescopic booms cannot be automatically adjusted according to the required pushing length. This leads to uneven stress on the telescopic booms during operation, which can easily cause local stress concentration and accelerated wear. This not only affects the service life of the telescopic booms but also reduces the stability and accuracy of drilling operations. Utility Model Content

[0004] The purpose of this utility model is to provide a telescopic boom structure for a hydraulic drilling rig, in order to solve the problem mentioned in the background art that when a hydraulic drilling rig drives a telescopic boom to perform pushing operations, it cannot automatically adjust the extension length of the first, second and third telescopic booms according to the required pushing length, which leads to uneven force on the telescopic boom during operation.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A telescopic boom structure for a hydraulic drilling rig includes a mounting plate, which is fixedly mounted on the rotary platform of the hydraulic drilling rig. A first telescopic boom is fixedly mounted on the upper surface of the mounting plate, a second telescopic boom is slidably mounted inside the first telescopic boom, and a third telescopic boom is slidably mounted inside the second telescopic boom. A pushing mechanism is fixedly mounted inside the mounting plate, and the pushing end of the pushing mechanism slides through the first telescopic boom and is fixedly connected to the lower surfaces of the second and third telescopic booms respectively.

[0007] As a preferred embodiment of this utility model, a first guide wheel and a second guide wheel are rotatably mounted at both ends of the first telescopic arm and the second telescopic arm, respectively. The first guide wheel and the second guide wheel are embedded and roll on the outer surfaces of the first guide strip and the second guide strip, respectively. The first guide strip and the second guide strip are fixedly mounted at one end of the second telescopic arm and the third telescopic arm, respectively.

[0008] As a preferred embodiment of this utility model, the pushing mechanism includes a first hydraulic cylinder, which is fixedly installed inside the first telescopic arm, and a piston rod slidably installed inside the first hydraulic cylinder is fixedly installed on the lower surface of the second telescopic arm.

[0009] As a further embodiment of this utility model, a second hydraulic cylinder is fixedly installed on one end of the outer surface of the first hydraulic cylinder. The second hydraulic cylinder is also located inside the first telescopic arm. The second hydraulic cylinder slides through the first telescopic arm into the second telescopic arm. The piston rod that is slidably installed inside the second hydraulic cylinder is fixedly installed on the lower surface of the third telescopic arm.

[0010] As a further embodiment of this utility model, the lower surfaces of both the first hydraulic cylinder and the second hydraulic cylinder are connected to a three-way pipe, which is fixedly installed inside the mounting plate. The remaining set of pipes extends through the mounting plate and can be connected to the closed hydraulic system of the hydraulic drilling rig.

[0011] As a preferred embodiment of this utility model, two sets of pipes in the three-way pipe are respectively connected and installed with solenoid valves. The solenoid valves are controlled by a controller, and the control output terminal of the controller is electrically connected to the electrical control terminal of the solenoid valve of the closed hydraulic system.

[0012] By controlling the opening and closing states of two solenoid valves, flexible control of hydraulic oil injection into the first and second hydraulic cylinders can be achieved. Opening one of the solenoid valves alone allows the three-way pipe to inject hydraulic oil into either the first or second hydraulic cylinder. Opening both solenoid valves simultaneously allows the three-way pipe to inject hydraulic oil into both the first and second hydraulic cylinders at the same time, thereby precisely controlling the extension and retraction of the first, second, and third telescopic arms.

[0013] Compared with the prior art, the beneficial effects of the hydraulic drilling rig telescopic boom structure of this utility model are as follows:

[0014] 1. In use, the second telescopic arm is pushed by activating the pushing mechanism, which in turn causes the first telescopic arm to extend out from the third telescopic arm. The pushing mechanism can determine the extension length of the second telescopic arm based on the injected hydraulic oil, and automatically adjust the length of the first telescopic arm pushed out based on this, until the required length is achieved. By judging the injection flow of hydraulic oil through the pushing mechanism, the second and third telescopic arms can be extended and retracted in stages. This design can automatically adjust the extension ratio of each arm according to the actual operation requirements, so that the telescopic arm can maintain the optimal stress state at different working lengths. This effectively avoids the problem of excessive cantilever bending moment caused by excessive extension of a single arm in traditional structures, and significantly improves the stability and accuracy of drilling operations.

[0015] 2. When the second telescopic arm is extended, the controller controls both sets of solenoid valves to open simultaneously, allowing the closed hydraulic system to simultaneously inject hydraulic oil into the first and second hydraulic cylinders. This enables the first and second hydraulic cylinders to push the piston rods together, extending the second and third telescopic arms together. Due to the synchronous extension of the second and third telescopic arms, the third telescopic arm remains in a retracted state, nested within the second telescopic arm, forming a combined action of synchronous extension of the two arms. This allows the second telescopic arm to extend independently. During this process, the controller monitors the opening duration of the solenoid valves and changes in hydraulic system pressure, combined with the effective area of ​​the hydraulic cylinder piston, to accurately calculate the relationship between the hydraulic oil injection volume and the stroke, thereby achieving closed-loop control of the extension length of each telescopic arm. Once the second telescopic boom extends to a specific length and is detected by the controller, the solenoid valve of the first hydraulic cylinder can be closed, while the solenoid valve of the second hydraulic cylinder remains open. This allows the third telescopic boom to continue extending from within the second telescopic boom, thus forming a tiered coordinated extension. This design can automatically adjust the extension ratio of each stage of the boom according to actual operational needs. Through this tiered control, the system can dynamically adjust the stiffness distribution of the cantilever structure according to the drilling depth. For example, during short-stroke operations, the last stage boom (third telescopic boom) is used first, concentrating the load on the most rigid base boom (first telescopic boom), reducing the cantilever ratio (extension length / base boom length) by 40%, thereby significantly reducing bending deformation. During long-stroke operations, multi-stage coordinated extension is used to distribute the load evenly across each stage of the boom, improving torsional resistance by approximately 35%. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the guide wheel and guide strip in an embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram of the pushing mechanism in an embodiment of the present invention.

[0020] Reference numerals: 1. Mounting plate; 101. First telescopic arm; 102. Second telescopic arm; 103. Third telescopic arm; 104. First guide wheel; 105. Second guide wheel; 106. First guide bar; 107. Second guide bar; 2. Pushing mechanism; 201. First hydraulic cylinder; 202. Second hydraulic cylinder; 203. T-pipe; 204. Solenoid valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0022] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0023] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present invention should be understood according to the specific circumstances.

[0024] See Figures 1-3 This utility model provides a hydraulic drilling rig telescopic arm structure, including a mounting plate 1. The mounting plate 1 is fixedly mounted on the rotary platform of the hydraulic drilling rig. A first telescopic arm 101 is fixedly mounted on the upper surface of the mounting plate 1. A second telescopic arm 102 is slidably mounted inside the first telescopic arm 101. A third telescopic arm 103 is slidably mounted inside the second telescopic arm 102. A pushing mechanism 2 is fixedly mounted inside the mounting plate 1. The pushing end of the pushing mechanism 2 slides through the first telescopic arm 101 and is fixedly connected to the lower surfaces of the second telescopic arm 102 and the third telescopic arm 103 respectively.

[0025] First guide wheel 104 and second guide wheel 105 are rotatably mounted at both ends of the first telescopic arm 101 and the second telescopic arm 102, respectively. The first guide wheel 104 and the second guide wheel 105 are embedded and roll on the outer surfaces of the first guide bar 106 and the second guide bar 107, respectively. The first guide bar 106 and the second guide bar 107 are fixedly mounted at one end of the second telescopic arm 102 and the third telescopic arm 103, respectively.

[0026] In use, the second telescopic arm 102 can be pushed by activating the pushing mechanism 2, causing the first telescopic arm 101 to extend out from the third telescopic arm 103 together. The pushing mechanism 2 can determine the extension length of the second telescopic arm 102 based on the injected hydraulic oil, and automatically adjust the length of the first telescopic arm 101 pushed out based on this until the required length is achieved. By judging the injection flow of hydraulic oil through the pushing mechanism 2, the second telescopic arm 102 and the third telescopic arm 103 can be extended and retracted in stages. This design can automatically adjust the extension ratio of each stage of the arm according to the actual operation requirements, so that the telescopic arm can maintain the optimal stress state at different working lengths. This effectively avoids the problem of excessive cantilever bending moment caused by excessive extension of a single stage arm in traditional structures, and significantly improves the stability and accuracy of drilling operations.

[0027] like Figure 3 As shown, the pushing mechanism 2 includes a first hydraulic cylinder 201, which is fixedly installed inside the first telescopic arm 101. A piston rod that is slidably installed inside the first hydraulic cylinder 201 is fixedly installed on the lower surface of the second telescopic arm 102.

[0028] A second hydraulic cylinder 202 is fixedly installed on one end of the outer surface of the first hydraulic cylinder 201. The second hydraulic cylinder 202 is also located inside the first telescopic arm 101. The second hydraulic cylinder 202 slides through the first telescopic arm 101 into the second telescopic arm 102. The piston rod that is slidably installed inside the second hydraulic cylinder 202 is fixedly installed on the lower surface of the third telescopic arm 103.

[0029] The lower surfaces of the first hydraulic cylinder 201 and the second hydraulic cylinder 202 are both connected to the three-way pipe 203. The three-way pipe 203 is fixedly installed in the mounting plate 1, and the remaining set of pipes passes through the mounting plate 1 and can be connected to the closed hydraulic system equipped on the hydraulic drilling rig.

[0030] Two sets of pipes in the three-way pipe 203 are respectively connected to and installed with solenoid valves 204. The solenoid valves 204 are controlled by a controller, and the control output terminal of the controller is electrically connected to the electrical control terminal of the solenoid valve in the closed hydraulic system.

[0031] The above technical solution achieves flexible control of the hydraulic oil injection into the first hydraulic cylinder 201 and the second hydraulic cylinder 202 by controlling the opening and closing states of the two solenoid valves 204. Opening one of the solenoid valves 204 alone allows the three-way pipe 203 to inject hydraulic oil into the first hydraulic cylinder 201 or the second hydraulic cylinder 202 separately. Opening both solenoid valves 204 at the same time allows the three-way pipe 203 to inject hydraulic oil into the first hydraulic cylinder 201 and the second hydraulic cylinder 202 simultaneously, thereby precisely controlling the extension and retraction of the first telescopic arm 101, the second telescopic arm 102 and the third telescopic arm 103.

[0032] When the second telescopic arm 102 is extended, the controller can open both sets of solenoid valves 204 simultaneously. This allows the closed hydraulic system to simultaneously inject hydraulic oil into the first hydraulic cylinder 201 and the second hydraulic cylinder 202. Consequently, the first and second hydraulic cylinders 201 and 202 push the piston rod together, extending the second telescopic arm 102 and the third telescopic arm 103 together. Due to the synchronous extension of the second and third telescopic arms 102 and 103, the third telescopic arm 103 remains nested within the second telescopic arm 102 in a retracted state, forming a combined action of synchronous extension of the two arms. This allows the second telescopic arm 102 to extend independently. During this process, the controller monitors the opening duration of the solenoid valves 204 and the changes in hydraulic system pressure, and, combined with the effective area of ​​the hydraulic cylinder piston, accurately calculates the relationship between the hydraulic oil injection volume and the stroke, thereby enabling the extension of each stage of the telescopic arm. The length is controlled in a closed loop. Once the second telescopic boom 102 extends to a specific length and is detected by the controller, the solenoid valve 204 of the first hydraulic cylinder 201 is closed, keeping the solenoid valve 204 of the second hydraulic cylinder 202 always open. This allows the third telescopic boom 103 to continue extending from within the second telescopic boom 102, thus forming a graded coordinated extension. The extension ratio of each stage of the boom can be automatically adjusted according to actual operational needs. Through this graded control, the system can dynamically adjust the stiffness distribution of the cantilever structure according to the drilling depth. For example, during short-stroke operations, the last stage boom (third telescopic boom 103) is used first, concentrating the load on the most rigid base boom (first telescopic boom 101), reducing the cantilever ratio (extension length / base boom length) by 40%, which can significantly reduce bending deformation. During long-stroke operations, multi-stage coordinated extension is used to distribute the load evenly among each stage of the boom, thereby improving the torsional resistance by about 35%.

[0033] Through the above-mentioned graded control, the system can dynamically adjust the stiffness distribution of the cantilever structure according to the drilling depth. During short-stroke operation, the last stage arm (third telescopic arm 103) is used first, and the load is concentrated on the base arm (first telescopic arm 101) with the strongest rigidity, so that the cantilever ratio (extended length / base arm length) is reduced by 40%, which can significantly reduce bending deformation. During long-stroke operation, multi-stage coordinated extension is adopted to distribute the load evenly on each stage of the arm, thereby improving the torsional resistance by about 35%.

[0034] The foregoing has shown and described the basic principles of the present invention. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A telescopic boom structure for a hydraulic drilling rig, characterized in that: The system includes a mounting plate (1), which is fixedly mounted on the rotary platform of the hydraulic drilling rig. A first telescopic arm (101) is fixedly mounted on the upper surface of the mounting plate (1). A second telescopic arm (102) is slidably mounted inside the first telescopic arm (101). A third telescopic arm (103) is slidably mounted inside the second telescopic arm (102). A pushing mechanism (2) is fixedly mounted inside the mounting plate (1). The pushing end of the pushing mechanism (2) slides through the first telescopic arm (101) and is fixedly connected to the lower surfaces of the second telescopic arm (102) and the third telescopic arm (103) respectively.

2. The telescopic boom structure of a hydraulic drilling rig according to claim 1, characterized in that: The first telescopic arm (101) and the second telescopic arm (102) are respectively rotatably mounted with a first guide wheel (104) and a second guide wheel (105). The first guide wheel (104) and the second guide wheel (105) are respectively embedded and roll on the outer surface of the first guide bar (106) and the second guide bar (107). The first guide bar (106) and the second guide bar (107) are respectively fixedly installed at one end of the second telescopic arm (102) and the third telescopic arm (103).

3. The telescopic boom structure of a hydraulic drilling rig according to claim 1, characterized in that: The pushing mechanism (2) includes a first hydraulic cylinder (201), which is fixedly installed inside the first telescopic arm (101), and a piston rod that is slidably installed inside the first hydraulic cylinder (201) is fixedly installed on the lower surface of the second telescopic arm (102).

4. The telescopic boom structure of a hydraulic drilling rig according to claim 3, characterized in that: A second hydraulic cylinder (202) is fixedly installed on one end of the outer surface of the first hydraulic cylinder (201). The second hydraulic cylinder (202) is also located inside the first telescopic arm (101). The second hydraulic cylinder (202) slides from inside the first telescopic arm (101) into the second telescopic arm (102). The piston rod that is slidably installed inside the second hydraulic cylinder (202) is fixedly installed on the lower surface of the third telescopic arm (103).

5. The telescopic boom structure of a hydraulic drilling rig according to claim 3, characterized in that: The lower surfaces of the first hydraulic cylinder (201) and the second hydraulic cylinder (202) are connected to the three-way pipe (203), which is fixedly installed in the mounting plate (1), and the remaining set of pipes passes through the mounting plate (1) and is connected to the closed hydraulic system equipped with the hydraulic drilling rig.

6. The telescopic boom structure of a hydraulic drilling rig according to claim 5, characterized in that: Two sets of pipes in the three-way pipe (203) are respectively connected to and installed with solenoid valves (204). The solenoid valves (204) are controlled by a controller, and the control output terminal of the controller is electrically connected to the electrical control terminal of the solenoid valve of the closed hydraulic system.

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