A horizontal directional drilling machine device with chassis and automatic rod loading and unloading

Abstract

This utility model discloses a chassis-mounted horizontal directional drilling rig with automatic drill rod lifting and lowering capability. It includes a traveling mechanism, a main drilling arm, and a fixed inclined trolley-mounted cantilever mechanism. A drill rod housing is fixedly mounted on the chassis of the traveling mechanism, located symmetrically to the main drilling arm, to balance the counterweight of the entire drilling rig. This utility model, through the coordinated operation of the fixed inclined trolley-mounted cantilever mechanism, the hydraulic magnetic gripping mechanism, and the automatic positioning mechanism for the front and rear supports of the drill rod, enables the drill rod to be flexibly and freely lifted and lowered, accurately moved back and forth between the drill rod housing and the main drilling arm, and precisely and automatically positioned on the main drilling arm. This utility model has low investment cost, strong practicality, and wide application range. It fully considers the stability of the drilling rig, the safety of operation and transportation, saves labor and effort, and greatly improves engineering efficiency.

Description

Technical Field

[0001] This utility model relates to the field of horizontal directional drilling rig technology, and in particular to a chassis-mounted horizontal directional drilling rig device that can automatically raise and lower drill rods. Background Technology

[0002] In recent years, horizontal directional drilling rigs have been widely used in urban and new rural construction for trenchless road laying, including the installation of water supply pipelines, power pipelines, and communication pipelines, playing an irreplaceable role. How to save manpower, make operation more convenient, and improve the automation level and work efficiency of horizontal directional drilling rigs has become a hot research topic for both manufacturers and users.

[0003] However, to date, the research and application of automatic drill pipe raising and lowering technology has not achieved a substantial breakthrough. The current application technology has significant limitations in use and is therefore not accepted by users.

[0004] In existing technology, the drill pipe loading box is positioned on top and supported by the main boom of the drilling rig. The drawbacks are as follows: Firstly, because it is positioned top-mounted and fixed to the main boom, when the drill pipe box is fully loaded with drill pipes, the center of gravity or counterweight of the entire drilling rig changes, making it unstable and prone to swaying, posing a safety hazard. Secondly, the main boom of the drilling rig becomes the support for the drill pipe box, and during operation, it is subjected to heavy pressure, which brings many disadvantages to the use of the drilling rig. Furthermore, due to its top-mounted design, the number of drill pipes that can be loaded is limited, far from meeting the needs of the project. Adding drill pipes to the drill pipe box is difficult, and unloading the added drill pipes at the end of the project is equally difficult. Utility Model Content

[0005] The purpose of this utility model is to provide a chassis-mounted horizontal directional drilling rig device that can automatically load and unload drill rods, in order to solve the technical problems in the prior art where the drill rod loading box is placed on top and supported by the main boom of the drilling rig, which makes the center of gravity or counterweight of the entire drilling rig unstable and prone to shaking, and the number of drill rods that can be loaded is limited, posing safety hazards and making it difficult to load and unload drill rods.

[0006] To solve the above-mentioned technical problems, this utility model provides a chassis-mounted horizontal directional drilling rig device with automatic drill rod raising and lowering, including a traveling mechanism, a drilling rig main boom, and an inclined fixed trolley cantilever crane mechanism. A drill rod box is fixedly installed on the chassis of the traveling mechanism. The drill rod box is located on the symmetrical side of the drilling rig main boom and is used to balance the counterweight of the entire drilling rig device. The inclined fixed trolley cantilever crane mechanism includes a trolley crane rail, a trolley crane trolley, a trolley crane hydraulic motor, a trolley crane sprocket, a trolley crane chain, a moving cantilever, a lifting hydraulic motor, gears, and a rack and pinion lifting rod.

[0007] Preferably, the drill rod box is provided with baffles at both the front and rear ends and a railing on the side to prevent the drill rod from falling. The drill rod box is provided with partitions inside for placing the drill rods in rows, so as to facilitate the orderly placement of the drill rods.

[0008] Preferably, a horizontally inclined gantry crane track is fixedly installed above the drill pipe box. The gantry crane track spans above the drill rig main boom and the drill pipe box. The gantry crane track is inclined in the horizontal direction relative to the drill pipe box. The angle of inclination is determined by the installation position of the drill pipe box. The length of the gantry crane track is greater than the combined width of the drill rig main boom and the drill pipe box below.

[0009] Preferably, a crane chain is provided on one side of the crane rail, and the crane chain is connected to a crane sprocket located at one end of the crane rail and the crane hydraulic motor; a crane trolley is movably mounted on the crane rail, and the crane trolley can move left and right on the crane rail under the drive of the crane chain. Because the crane rail is inclined relative to the entire machine body and drill pipe box, the forward and backward movement of the drill pipe is also ensured when the crane trolley moves left and right.

[0010] Preferably, a movable cantilever is fixedly connected to the trolley of the crane, and a rack and pinion lifting rod is movably connected to the other end of the movable cantilever. The rack and pinion lifting rod is equipped with a lifting hydraulic motor and a gear, and the rack and pinion lifting rod can move up and down at one end of the movable cantilever under the action of the lifting hydraulic motor and the gear.

[0011] Preferably, a hydraulic magnetic gripper is movably provided at the lower end of the rack lifting rod for gripping and releasing the drill rod. The hydraulic magnetic gripper includes a magnetic claw and a hydraulic motor. Under the action of the hydraulic motor, the magnetic claw can switch between an angle parallel to the rotating rod inside the drill rod box and an angle parallel to the main boom of the drilling rig.

[0012] Preferably, a track for sliding the drill rig power head is fixed on the main boom of the drill rig, and the front end of the drill rig power head is provided with a drill rod nozzle that can rotate left and right for installing or unloading drill rods. The drill rod installed on the drill rig power head is parallel to the main boom of the drill rig.

[0013] Preferably, the drill rod support point at the front end of the drilling rig main boom is fixedly provided with a drill rod positioning front support;

[0014] The drill rig's main boom is equipped with an automatic positioning mechanism for the drill rod rear support, which is used to support and position the drill rod when it is installed after the drill rig's power head has slid to a fixed position. The automatic positioning mechanism for the drill rod rear support includes a drill rod positioning rear support, a return spring, a drill rod positioning rear support hinge, a one-way swing arm, a swing arm hinge, and a wire rope.

[0015] Preferably, the drill rod positioning support, return spring, and drill rod positioning support hinge are located on the side of the main boom of the drilling rig near the power head of the drilling rig to facilitate the support and positioning of the drill rod, or they can be located in the groove in the middle of the main boom of the drilling rig.

[0016] The one-way swing arm, swing arm hinge, and wire rope are arranged on one side symmetrical to the drilling rig main boom and the drill rod positioning support, return spring, and drill rod positioning support hinge. They are used to control the drill rod positioning support to move to a position that can support and position the drill rod when the drilling rig power head slides to a fixed position.

[0017] Preferably, an operating platform, a hydraulic main pump, and a hydraulic auxiliary pump are provided on the other side of the drilling rig's main boom. An electro-hydraulic triple valve is provided on the operating platform for wired control of the movement of the gantry crane trolley, the rack and pinion lifting rod, and the hydraulic magnetic grabber.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This utility model provides a chassis-mounted horizontal directional drilling rig device with automatic drill rod loading and unloading. The drill rod box is fixed to the chassis of the traveling mechanism, innovatively changing the original top-mounted design supported by the main boom of the drilling rig to a chassis-mounted design where the drill rod box is directly on the traveling mechanism. This significantly optimizes the overall weight distribution of the drilling rig, making it more stable and overcoming the safety hazards caused by the unstable center of gravity of the machine in the original technology. Since the drill rod box is not on the main boom of the drilling rig, the main boom no longer bears heavy pressure during operation, eliminating many disadvantages caused by heavy pressure. The number of drill rods that can be loaded is substantially increased, basically meeting the required number of drill rods for engineering projects. Adding or removing drill rods from the drill rod box and recycling drill rods becomes simple and easy.

[0020] The coordinated operation of the inclined fixed gantry crane mechanism, the hydraulic magnetic gripping mechanism, and the drill rod front and rear support automatic positioning mechanism enables the drill rod to be flexibly and freely gripped and lowered, accurately and precisely moved back and forth between the drill rod box and the main boom of the drilling rig, and achieves the technical effect of precise automatic positioning of the drill rod on the main boom of the drilling rig.

[0021] This technical solution will bring a qualitative leap to the application technology innovation of horizontal directional drilling rigs. This is reflected in: low investment cost, strong practicality, wide application range, and the fact that the innovation and design fully consider the stability of the drilling rig main unit, the safety of operation and transportation, labor saving, and significantly improved project efficiency. Attached Figure Description

[0022] Figure 1 This is the front view of the present invention;

[0023] Figure 2 This is a top view of the present invention.

[0024] Reference numerals: 1. Traveling mechanism; 2. Drill rod positioning front support; 3. Drill rod housing; 4. Crane track; 5. Crane trolley; 6. Crane hydraulic motor; 7. Crane sprocket; 8. Crane chain; 9. Moving boom; 10. Drill rod; 11. Lifting hydraulic motor; 12. Gear; 13. Rack lifting rod; 14. Hydraulic magnetic gripper; 15. Drill rod positioning rear support; 16. Return spring; 17. Drill rod positioning rear support hinge; 18. Drill rig power head; 19. Drill rig main boom; 20. One-way swing arm; 21. Swing arm hinge; 22. Wire rope; 23. Electro-hydraulic triple valve. Detailed Implementation

[0025] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, top, bottom, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or IoT terminal that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or IoT terminals.

[0026] Furthermore, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0028] Example

[0029] like Figure 1-2As shown, this utility model provides a chassis-mounted horizontal directional drilling rig device with automatic drill rod loading and unloading, including a traveling mechanism 1, a drilling rig main boom 19 and an inclined fixed gantry crane mechanism. A drill rod box 3 is fixedly mounted on the chassis of the traveling mechanism 1. The drill rod box 3 is located on the symmetrical side of the drilling rig main boom 19 and is used to balance the counterweight of the entire drilling rig device.

[0030] This application innovatively fixes the drill pipe box 3 to the chassis of the traveling mechanism, transforming the original top-mounted design supported by the drilling rig's main boom into a design where the drill pipe box serves as the main beam of the machine body, which is essentially the chassis of the traveling mechanism. On one hand, because the drill pipe box is fixed to the main beam of the machine body, symmetrically positioned on the drilling rig's main boom, the previously lighter side of the machine becomes heavier, thus greatly optimizing the overall weight distribution of the drilling rig and making it more stable. This overcomes the safety hazards caused by the unstable center of gravity of the machine in the original technology. On the other hand, since the drill pipe box is no longer on the drilling rig's main boom, the main boom no longer bears heavy pressure during operation, eliminating many disadvantages caused by heavy pressure. Furthermore, the number of drill pipes that can be loaded is significantly increased, basically meeting the required number of drill pipes for engineering projects, while adding or removing drill pipes from the drill pipe box becomes simple and easy.

[0031] The drill rod housing 3 is equipped with baffles at both the front and rear ends and a railing on the side to prevent the drill rod from falling during walking or operation; the drill rod housing 3 is equipped with partitions inside for placing the drill rods in rows, which facilitates the orderly placement of the drill rods.

[0032] The inclined fixed-type overhead crane cantilever mechanism includes an overhead crane track 4, an overhead crane trolley 5, an overhead crane hydraulic motor 6, an overhead crane sprocket 7, an overhead crane chain 8, a moving cantilever 9, a lifting hydraulic motor 11, a gear 12, and a rack and pinion lifting rod 13. This inclined fixed-type overhead crane cantilever mechanism accurately positions the drill rod as it moves parallel to the drill rod housing and then parallel to the drill rig's main boom, or vice versa. This mechanism is highly versatile and suitable for various machine models.

[0033] The inclined fixed gantry crane cantilever mechanism can be installed on the drill pipe box or on the main beam of the drilling rig, depending on the different drilling rig models. The position of the gantry crane rail 4 determines the length of the moving cantilever 9. When the gantry crane rail 4 is at the end position, the length of the moving cantilever 9 is the longest. When the gantry crane rail 4 is at the center position of the drill pipe, the length of the moving cantilever 9 is the shortest. The length of the moving cantilever 9 can be zero.

[0034] A horizontally inclined gantry crane track 4 is fixedly installed above the drill pipe housing 3 or on the main beam of the drilling rig. The gantry crane track 4 spans across the top of the main boom of the drilling rig 19 and the drill pipe housing 3. The gantry crane track 4 is inclined in the horizontal direction relative to the drill pipe housing 3. The angle of inclination is determined by the installation position of the drill pipe housing 3. The length of the gantry crane track 4 is greater than the combined width of the main boom of the drilling rig 19 and the drill pipe housing 3 below.

[0035] A crane chain 8 is provided on one side of the crane rail 4. The crane chain 8 is connected to a crane sprocket 7 and a crane hydraulic motor 6 located at one end of the crane rail 4. A crane trolley 5 is movably mounted on the crane rail 4. The crane trolley 5 can move left and right on the crane rail 4 under the drive of the crane chain 8. Because the crane rail is inclined relative to the entire machine body and drill pipe box, the forward and backward movement and left and right translation of the drill pipe are also ensured when the crane trolley 5 moves left and right on the crane rail 4.

[0036] A movable cantilever 9 is fixedly connected to the trolley 5 of the overhead crane. A rack and pinion lifting rod 13 is movably connected to the other end of the movable cantilever 9. A lifting hydraulic motor 11 and a gear 12 are provided on the rack and pinion lifting rod 13. The rack and pinion lifting rod 13 can move up and down at one end of the movable cantilever 9 under the action of the lifting hydraulic motor 11 and the gear 12.

[0037] A hydraulic magnetic gripper 14 is movably mounted at the lower end of the rack and pinion lifting rod 13 for gripping and releasing the drill rod 10. The hydraulic magnetic gripper 14 includes a magnetic claw and a hydraulic motor. Under the action of the hydraulic motor, the magnetic claw can switch between an angle parallel to the drill rod inside the drill rod housing 3 and an angle parallel to the main boom 19 of the drilling rig. The rotation angle of the magnetic claw is pre-measured and calibrated, and can be set to have only two angle positions, enabling one-button shifting.

[0038] The hydraulic magnetic gripper 14, in conjunction with the movable cantilever 9, can complete the installation and unloading of the drill rod 10 on the drill rig power head 18. Under the control of the electro-hydraulic triple valve, it can flexibly and freely grip or release the drill rod. The application of this mechanism and the drill rods arranged in a dense and orderly manner in the drill rod box free the drill rig from the space requirements of the mechanical claw, greatly reducing the stacking volume of the drill rods.

[0039] A track for sliding the drill power head 18 is fixed on the main boom 19 of the drill rig. The front end of the drill power head 18 is provided with a drill rod nozzle that can rotate left and right for installing or unloading the drill rod 10. The drill rod 10 installed on the drill power head 18 is parallel to the main boom 19 of the drill rig.

[0040] The drill rod support point at the front end of the main boom 19 of the drilling rig is fixedly provided with a drill rod positioning front support 2;

[0041] The drill rod rear support automatic positioning mechanism is provided at the rear end of the drill rig main boom 19. It is used to support and position the drill rod 10 when the drill rig power head 18 is slid to a fixed position. The drill rod rear support automatic positioning mechanism includes a drill rod positioning rear support 15, a return spring 16, a drill rod positioning rear support hinge 17, a one-way swing arm 20, a swing arm hinge 21, and a wire rope 22. This application achieves automatic and precise positioning of the drill rod during loading and unloading by two support points at the front and rear.

[0042] The drill rod positioning support 15, return spring 16, and drill rod positioning support hinge 17 are located on the side of the drilling rig main arm 19 near the drilling rig power head 18 to facilitate the support and positioning of the drill rod 10. They can also be located in the groove in the middle of the drilling rig main arm 19. The one-way swing arm 20, swing arm hinge 21, and wire rope 22 are located on the side of the drilling rig main arm 19 symmetrical to the drill rod positioning support 15, return spring 16, and drill rod positioning support hinge 17. They are used to control the drill rod positioning support 15 to move to a position that can support and position the drill rod 10 when the drilling rig power head 18 slides to a fixed position.

[0043] The working principle of the drill rod rear support automatic positioning mechanism is that when the drill rig power head 18 slides to a fixed position, that is, the position where the drill rod needs to be installed or unloaded, the drill rod positioning rear support 15 will automatically move to the corresponding position to provide rear support positioning for the drill rod under the coordinated action of the return spring 16, the drill rod positioning rear support hinge 17, the one-way swing arm 20, the swing arm hinge 21 and the wire rope 22.

[0044] An operating platform, a hydraulic main pump, and a hydraulic auxiliary pump are provided on the other side of the drilling rig main boom 19. An electro-hydraulic triple valve 23 is provided on the operating platform for wired control of the movement of the gantry crane 5, the rack and pinion lifting rod 13, and the hydraulic magnetic grab 14.

[0045] The electro-hydraulic triple valve 23 is powered by the main hydraulic auxiliary pump, which is located next to the drilling rig's power unit and is separately installed from the main hydraulic pump. The electronic control of the electro-hydraulic triple valve 23 is via a wired circuit.

[0046] The control system of the electro-hydraulic triple valve 23 is divided into three paths: one path controls the trolley 5 of the inclined fixed trolley boom crane mechanism to move on the trolley track 4 to the corresponding position of the drill rod box 3 or to the position above the main boom 19 of the drilling rig corresponding to the power head 18 of the drilling rig, which realizes the horizontal positioning and front-back positioning of the drill rod; another path controls the lifting hydraulic motor 11 to move up and down at one end of the moving boom 9, which realizes the vertical positioning of the drill rod, and together with the front and rear positioning support mechanism, it can achieve parallelism with the main boom of the drilling rig; the third path controls the angle and magnetic switch of the hydraulic magnetic grab 14, which realizes the grabbing and release of the drill rod.

[0047] Working principle: First, the electro-hydraulic triple valve controls the gantry crane to move along the gantry crane track to the corresponding column of drill rods in the drill rod housing. The corresponding movable cantilever and rack lifting rod, fixed on the gantry crane, are also above the drill rod column. The electro-hydraulic triple valve controls the rack lifting rod to move downwards until the hydraulic magnetic grabber can contact the drill rod. Then, the electro-hydraulic triple valve controls the hydraulic magnetic grabber (initially set to be parallel to the rotating rod inside the drill rod housing) to activate the magnetic switch. Because the drill rods are placed sequentially, it is easy to control the hydraulic magnetic grabber to grab only one drill rod, and also easy to control which column of drill rods to grab. The rack lifting rod is then moved upwards to a position that does not affect the horizontal movement of the drill rods. The gantry crane trolley is moved along the gantry crane track to above the main boom of the drilling rig. At this time, the drill rod that has been grabbed is moved parallel to the main boom from above the drill rod housing. The hydraulic magnetic gripper is then rotated to an angle parallel to the main boom of the drilling rig (at this point, the grabbed drill rod is parallel to the main boom). The drilling rig power head is then slid upward to the fixed position where the drill rod needs to be installed. After the drill rod is positioned, the support moves to the support position. Then, the rack and pinion lifting rod is moved downward until the drill rod is aligned with the drill rod nozzle on the drilling rig power head. At this point, the drill rod is automatically and accurately positioned under the action of the two support points. The drilling rig power head is then slid downward to the drill rod nozzle to rotate and install the drill rod into place. This completes the precise and automatic installation of the drill rod. After the drill rod is positioned, the support automatically returns to its original position.

[0048] The drill pipe unloading process is the reverse of the installation process, and will not be described in detail here.

[0049] The movement position of the overhead crane trolley 5 on the overhead crane track 4 and the up-and-down movement position of the rack and pinion lifting rod 13 in this application can be pre-adjusted to several gears for easy gear shifting by the operator, or it can be set to a mode for free operation by the operator. It is applicable to the operation of various crane models.

[0050] This application utilizes the coordinated operation of a slanted fixed overhead crane cantilever mechanism, a hydraulic magnetic gripping mechanism, and an automatic positioning mechanism for the front and rear supports of the drill rod to achieve flexible and free gripping and lowering of the drill rod, accurate back-and-forth translation of the drill rod between the drill rod housing and the main boom of the drilling rig, and precise automatic positioning of the drill rod on the main boom of the drilling rig.

[0051] The innovative application of this application brings a qualitative leap to the technological innovation of horizontal directional drilling rigs. This is reflected in: low investment cost, strong practicality, wide application range, and the fact that the innovation and design fully consider the stability of the drilling rig main unit, the safety of operation and transportation, labor saving, and significantly improved project efficiency.

[0052] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the specific details described above. The above description is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features of this application.

[0053] The above are merely preferred embodiments of this application and are not intended to limit the scope of this application. Any modifications or equivalent substitutions made within the spirit and principles of this application shall be included within the protection scope of this application.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A chassis mounted horizontal directional drilling rig apparatus capable of automatically raising and lowering drill pipe comprising a travel mechanism (1) and a rig main arm (19) characterised in that, It also includes a fixed inclined gantry crane mechanism, on which a drill rod box (3) is fixedly mounted on the chassis of the traveling mechanism (1). The drill rod box (3) is located on the symmetrical side of the main boom (19) of the drilling rig and is used to balance the counterweight of the entire drilling rig device. The fixed inclined gantry crane mechanism includes a gantry crane track (4), a gantry crane carriage (5), a gantry crane hydraulic motor (6), a gantry crane sprocket (7), a gantry crane chain (8), a moving boom (9), a lifting hydraulic motor (11), a gear (12), and a rack and pinion lifting rod (13).

2. The chassis-supported, automatically raising and lowering horizontal directional drilling rig device according to claim 1, characterized in that, The drill rod box (3) is equipped with baffles at the front and rear ends and a fence on the side to prevent the drill rod from falling. The drill rod box (3) is equipped with partitions inside to separate the drill rods for orderly placement.

3. The chassis-supported, automatically raising and lowering horizontal directional drilling rig device according to claim 1, characterized in that, A horizontally inclined gantry crane track (4) is fixedly installed above the drill pipe box (3). The gantry crane track (4) spans across the top of the drill rig main boom (19) and the drill pipe box (3). The gantry crane track (4) is inclined in the horizontal direction relative to the drill pipe box (3). The angle of inclination is determined by the installation position of the drill pipe box (3). The length of the gantry crane track (4) is greater than the combined width of the drill rig main boom (19) and the drill pipe box (3) below.

4. The chassis-supported, automatically raising and lowering horizontal directional drilling rig device according to claim 1, characterized in that, A crane chain (8) is provided on one side of the crane track (4). The crane chain (8) is connected to the crane sprocket (7) and the crane hydraulic motor (6) at one end of the crane track (4). A crane trolley (5) is movably provided on the crane track (4). The crane trolley (5) can move left and right on the crane track (4) under the drive of the crane chain (8).

5. A chassis-supported horizontal directional drilling rig with automatic drill rod loading and unloading as described in claim 1, characterized in that, A movable cantilever (9) is fixedly connected to the trolley (5) of the crane. A rack lifting rod (13) is movably connected to the other end of the movable cantilever (9). A lifting hydraulic motor (11) and a gear (12) are provided on the rack lifting rod (13). The rack lifting rod (13) can move up and down at one end of the movable cantilever (9) under the action of the lifting hydraulic motor (11) and the gear (12).

6. The chassis-mounted, automatically raising and lowering horizontal directional drilling rig according to claim 1, characterized in that, A hydraulic magnetic gripper (14) is movably installed at the lower end of the rack lifting rod (13) for gripping and releasing the drill rod (10). The hydraulic magnetic gripper (14) includes a magnetic claw and a hydraulic motor. Under the action of the hydraulic motor, the magnetic claw can switch between the angle parallel to the rotating rod inside the drill rod box (3) and the angle parallel to the main boom (19) of the drilling rig.

7. A chassis-mounted, automatically raising and lowering horizontal directional drilling rig according to claim 1, characterized in that, A track for sliding the drill power head (18) is fixed on the main boom (19) of the drill rig. The front end of the drill power head (18) is provided with a drill rod nozzle that can rotate left and right for installing or unloading the drill rod (10). The drill rod (10) installed on the drill power head (18) is parallel to the main boom (19) of the drill rig.

8. A chassis-mounted, automatically raising and lowering horizontal directional drilling rig according to claim 7, characterized in that, The drill rod support point at the front end of the main boom (19) of the drilling rig is fixedly provided with a drill rod positioning front support (2). The drill rod rear support automatic positioning mechanism is provided at the rear end of the main boom (19) of the drilling rig. It is used to support and position the drill rod (10) when the drill rod is installed after the power head (18) of the drilling rig slides to a fixed position. The drill rod rear support automatic positioning mechanism includes a drill rod positioning rear support (15), a return spring (16), a drill rod positioning rear support hinge (17), a one-way swing arm (20), a swing arm hinge (21), and a wire rope (22).

9. A chassis-mounted, automatically raising and lowering horizontal directional drilling rig according to claim 8, characterized in that, The drill rod positioning support (15), return spring (16) and drill rod positioning support hinge (17) are set on the main arm (19) of the drilling rig near the power head (18) of the drilling rig to facilitate the support and positioning of the drill rod (10) on the side. They can also be set in the groove in the middle of the main arm (19) of the drilling rig. The one-way rocker arm (20), rocker arm hinge (21) and wire rope (22) are arranged on one side of the main boom (19) of the drilling rig symmetrical to the drill rod positioning support (15), return spring (16) and drill rod positioning support hinge (17), and are used to control the drill rod positioning support (15) to move to a position that can support and position the drill rod (10) when the drilling rig power head (18) slides to a fixed position.

10. A chassis-mounted, automatically raising and lowering horizontal directional drilling rig according to claim 6, characterized in that, On the other side of the main boom (19) of the drilling rig, there is an operating platform, a hydraulic main pump and a hydraulic auxiliary pump. An electronic hydraulic triple valve (23) is provided on the operating platform for wired control of the movement of the gantry crane trolley (5), the rack lifting rod (13) and the hydraulic magnetic grab (14).

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