Earth boring machine for forestry seedling planting

Abstract

The invention relates to the technical field of nursery stock planting, and discloses a digging machine for forestry nursery stock planting, which comprises a bottom frame, one side of the top of the bottom frame is fixedly connected with a mounting frame, the exterior of the mounting frame is provided with a digging mechanism, and the top end of the exterior of the mounting frame is provided with an up-and-down moving mechanism. A flushing and drying mechanism is arranged at the bottom of the up-and-down moving mechanism, the pit digging mechanism is used for digging holes in the ground, the up-and-down moving mechanism can drive the flushing and drying mechanism to move, and therefore the pit digging mechanism can be cleaned and dried, and the pit digging mechanism comprises a motor; and the bottom of the motor is fixedly connected to the top of the mounting frame. Through cooperation of the up-down moving mechanism and the washing and drying mechanism, soil can be prevented from being attached to the drilling tool, the service life of the drilling tool in the device is prolonged, manual cleaning is not needed, and the workload of workers can be reduced while the cleaning efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of seedling planting, and in particular to a pit digging machine used for forestry seedling planting. Background Art

[0002] When planting forestry seedlings, it is necessary to dig holes on the ground to facilitate placing the roots of the seedlings into the holes. At present, large-scale seedling planting mainly uses ground hole digging devices to dig ground holes, and ground hole digging devices are divided into portable digging machines and vehicle-mounted digging machines. The portable excavator is powered by a gasoline engine, which transmits power to a high-reduction ratio transmission box through an overrunning clutch, reduces the speed and increases the torque, thereby driving the drill to rotate and realize drilling and excavation of the ground.

[0003] The portable digging machine in the prior art does not have an automatic cleaning structure. If the soil in the working environment is very sticky, such as clay, the soil will easily adhere to the surface of the auger blade when the auger blade rotates to dig a hole. Even sandy soil may adhere to the auger blade under high humidity conditions. The soil contains various corrosive substances such as acids, alkalis, and salts. These substances will react chemically when in contact with the surface of the auger blade. If they are not cleaned in time, the protective layer on the surface of the auger blade will be destroyed, causing rust and reducing the service life of the drilling tool of the pit excavation device. If it is cleaned manually, it will be time-consuming and labor-intensive, reducing the cleaning efficiency and increasing the workload of the staff. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a pit digging machine for forestry seedling planting, which solves the problem that the pit digging device in the prior art does not have an automatic cleaning structure, resulting in rusting of the drill bit after being contaminated with mud, thereby reducing the service life of the drill bit in the device; if manual cleaning is required, the cleaning efficiency is reduced and the workload of the staff is increased.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a pit digging machine for forestry seedling planting, comprising a base frame, a mounting frame fixedly connected to the top side of the base frame, a pit digging mechanism arranged on the outside of the mounting frame, an upper and lower movable mechanism arranged on the outer top of the mounting frame, a flushing and drying mechanism arranged on the bottom of the upper and lower movable mechanism, the pit digging mechanism is used to dig holes in the ground, and the upper and lower movable mechanism can drive the flushing and drying mechanism to move, thereby cleaning and drying the pit digging mechanism.

[0006] Preferably, the digging mechanism includes an electric motor, the bottom of the electric motor is fixedly connected to the top of the mounting frame, the output end of the electric motor is fixedly connected to a threaded rod, the external thread of the threaded rod is connected to a sliding frame, the two ends of the sliding frame are respectively slidably connected to the two ends of the mounting frame, the outside of the sliding frame is detachably connected to the engine, the outside of the sliding frame is fixedly connected to a transmission, the output end of the transmission is fixedly connected to an auger drilling head, and a belt is sleeved between the input end of the transmission and the output end of the engine.

[0007] Preferably, the upper and lower movable mechanism includes two mounting cylinders, the internal sliding connection of the mounting cylinder is connected to a limit ring, the bottom of the limit ring is fixedly connected to a movable rod, a spring is fixedly connected between the internal bottom end of the mounting cylinder and the inside of the movable rod, the external bottom end of the mounting cylinder is fixedly connected to two automatic valves, the top of the mounting cylinder is fixedly connected to a mounting bent rod, the tops of the two mounting bent rods are respectively fixedly connected to the external top ends of the mounting frame, the outside of the sliding frame is fixedly connected to a pump head, the output end of the engine is fixedly connected to the input shaft of the pump head, the input end of the pump head is fixedly connected to a water inlet pipe, wherein a connecting pipe is fixedly connected between the two automatic valves, and the inner sides of the other two automatic valves are fixedly connected to drain pipes, the outside of the mounting frame is fixedly connected to a water tank, the end of the water inlet pipe away from the pump head is fixedly connected to the outside of the water tank, the output end of the pump head is fixedly connected to a water outlet pipe, and the side of the water outlet pipe away from the pump head is fixedly connected to the external bottom end of the connecting pipe.

[0008] Preferably, the flushing and drying mechanism comprises an installation box, the interior of the installation box is rotatably connected to an impeller, one end of the impeller is fixedly connected to a rotating shaft, the end of the rotating shaft away from the impeller is fixedly connected to a fan, both ends of the exterior of the installation box are fixedly connected to fixed bent rods, a mounting frame is fixedly connected between the two fixed bent rods, one end of the fan is rotatably connected to the inner side of the installation frame, the inner side of the installation frame is fixedly connected to a heating wire, the exterior of the rotating shaft is rotatably connected to the bottom of one of the movable rods, a three-way valve is fixedly connected to the bottom of the installation box, one end of the three-way valve is fixedly connected to a drainage hose, one end of the drainage hose away from the three-way valve is fixedly connected to the outside of the water tank, a water spray head is fixedly connected to the bottom of the other movable rod, one end of the water spray head away from the installation box is fixedly connected to a connecting hose, one end of the connecting hose away from the water spray head is fixedly connected to the bottom of the three-way valve, a water-passing hose is fixedly connected to the exterior of the connecting pipe, and the top of the water-passing hose is fixedly connected to the outer bottom end of the connecting pipe.

[0009] Preferably, the top end of the threaded rod is externally rotatably connected to the middle of the top end of the mounting frame, and the bottom end of the threaded rod is rotatably connected to the top of the base frame.

[0010] Preferably, a water injection pipe is fixedly connected to the top of the water tank, and a threaded cap is threadedly connected to the top of the water injection pipe.

[0011] Preferably, an auxiliary rod is fixedly connected to the outside of the installation tube, and one end of two auxiliary rods away from the installation tube is fixedly connected to the outside of the water tank.

[0012] Preferably, the outer portion of the rotating shaft is rotatably connected to one end of the installation box close to the water spray head, and one side of the installation box close to the water spray head is fixedly connected to the outer bottom end of the movable rod.

[0013] Preferably, the side of the base frame away from the pit digging mechanism is rotatably connected to two rotating wheels, and the bottom of the water tank is fixedly connected to the top of the base frame.

[0014] Preferably, four corners of the bottom of the base frame are fixedly connected with soil nails, both ends of the top of the mounting frame are fixedly connected with handles, and two stabilizing rods are detachably connected between the outside of the mounting frame and the outside of the base frame.

[0015] The present invention provides a pit digging machine for forestry seedling planting, which has the following beneficial effects:

[0016] 1. The present invention can automatically clean the drill tool in the ground hole excavation device through the cooperation of the upper and lower movable mechanisms and the flushing and drying mechanisms, thereby preventing soil from adhering to the drill tool, thereby increasing the service life of the drill tool in the device, and eliminating the need for manual cleaning, thereby improving the cleaning efficiency and reducing the workload of the staff.

[0017] 2. The present invention, through the provision of a flushing and drying mechanism, can flush and dry the drill tools in the device at the same time, thereby preventing moisture from forming a water film on the surface of the auger piece in the drill tool, thereby preventing moisture from accelerating the rusting process of the auger piece, thereby protecting the drill tools in the ground pit excavation device, increasing the replacement cycle of the drill tools, and reducing the cost of hole excavation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The three-dimensional Figure 1 ;

[0019] Figure 2 The three-dimensional Figure 2 ;

[0020] Figure 3 It is a structural schematic diagram of the pit digging mechanism in the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the pump head in the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the water hose in the present invention;

[0023] Figure 6 It is a structural schematic diagram of the installation cylinder in the present invention;

[0024] Figure 7 It is a schematic diagram of the structure of the electric heating wire in the present invention;

[0025] Figure 8 It is a schematic diagram of the structure of the impeller in the present invention.

[0026] Among them, 1. chassis; 2. mounting frame; 3. digging mechanism; 301. motor; 302. threaded rod; 303. sliding frame; 304. engine; 305. transmission; 306. auger drilling head; 4. upper and lower movable mechanism; 401. mounting cylinder; 402. limit ring; 403. movable rod; 404. spring; 405. automatic valve; 406. mounting bent rod; 407. auxiliary rod; 408. pump head; 409. water inlet pipe; 410. connecting pipe; 411. Drain pipe; 412. Water tank; 413. Water filling pipe; 414. Water outlet pipe; 5. Flushing and drying mechanism; 501. Installation box; 502. Impeller; 503. Rotating shaft; 504. Fan; 505. Fixed bent rod; 506. Installation frame; 507. Heating wire; 508. Three-way valve; 509. Drain hose; 510. Sprinkler head; 511. Connecting hose; 512. Water hose; 6. Rotating wheel; 7. Soil nail; 8. Handle; 9. Stabilizer bar. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Please refer to the attached Figure 1 -Attached Figure 8The embodiment of the present invention provides a digging machine for planting forestry seedlings, including a base frame 1, a mounting frame 2 is fixedly connected to one side of the top of the base frame 1, the mounting frame 2 can provide a mounting position, a digging mechanism 3 is arranged on the outside of the mounting frame 2, the digging mechanism 3 can be used for digging holes on the ground, an upper and lower movable mechanism 4 is arranged on the top of the outer top of the mounting frame 2, a flushing and drying mechanism 5 is arranged on the bottom of the upper and lower movable mechanism 4, the digging mechanism 3 is used for digging holes on the ground, and the flushing and drying mechanism 5 can be driven to move by the upper and lower movable mechanism 4, so that the digging mechanism 3 can be cleaned and dried, and two rotating wheels 6 are rotatably connected to one side of the base frame 1 away from the digging mechanism 3, the bottom of the water tank 412 is fixedly connected to the top of the base frame 1, and soil nails 7 are fixedly connected to the four corners of the bottom of the base frame 1, handles 8 are fixedly connected to the two ends of the top of the mounting frame 2, and two stabilizing bars 9 are detachably connected between the outside of the mounting frame 2 and the outside of the base frame 1.

[0029] The digging mechanism 3 includes a motor 301, the bottom of the motor 301 is fixedly connected to the top of the mounting frame 2, the output end of the motor 301 is fixedly connected to a threaded rod 302, and the output end of the motor 301 can drive the threaded rod 302 to rotate after rotating, the external threaded rod 302 is threadedly connected to a sliding frame 303, and the sliding frame 303 can be slidably connected to the outside of the mounting frame 2, and the two ends of the sliding frame 303 are respectively slidably connected to the two ends of the mounting frame 2, and the outside of the sliding frame 303 is detachably connected to an engine 304, and the engine 304 can provide power for excavation, and the outside of the sliding frame 303 is fixedly connected to a transmission 305, and the output end of the transmission 305 is fixedly connected to an auger drilling head 306, and the auger drilling head 306 can be used for digging holes on the ground, and a belt is sleeved between the input end of the transmission 305 and the output end of the engine 304, the top end of the threaded rod 302 is externally rotatably connected to the middle of the top end of the mounting frame 2, and the bottom of the threaded rod 302 is rotatably connected to the top of the base frame 1. When digging a hole on the ground, the motor 301 is first started. After the output end of the motor 301 rotates, the threaded rod 302 can be driven to rotate. After the threaded rod 302 rotates, the sliding frame 303 can be driven to move downward. After the sliding frame 303 moves downward, the engine 304 and the transmission 305 can be driven to move downward. After the transmission 305 moves downward, the auger drill head 306 can be driven to move downward. At this time, the engine 304 is turned on. After the output end of the engine 304 rotates, the transmission 305 is driven to rotate through a belt. After the transmission 305 rotates, the auger drill head 306 can be driven to rotate. Therefore, as the auger drill head 306 rotates and moves downward, the digging of the hole on the ground can be completed. When the digging is completed, the engine 304 is turned off and the motor 301 is started at the same time. As the threaded rod 302 rotates in the opposite direction, the sliding frame 303, the engine 304, the transmission 305 and the auger drill head 306 are driven to move upward, thereby completing the digging of the hole on the ground.

[0030] The upper and lower movable mechanism 4 includes two mounting cylinders 401, which can provide mounting positions. The inner sliding connection of the mounting cylinder 401 is connected to a limiting ring 402, which provides a limiting function. The bottom of the limiting ring 402 is fixedly connected to a movable rod 403, which can slide inside the mounting cylinder 401, thereby achieving a lifting effect. A spring 404 is fixedly connected between the inner bottom end of the mounting cylinder 401 and the inner part of the movable rod 403. Two automatic valves 405 are fixedly connected to the outer bottom end of the mounting cylinder 401, and the automatic valves 405 can automatically control the on and off of the flow of liquid. The top of the mounting cylinder 401 is fixedly connected to a mounting bent rod 406, which plays a role in installation and fixing. The tops of the mounting bent rods 406 are respectively fixedly connected to the external tops of the mounting frame 2, the external part of the sliding frame 303 is fixedly connected with a pump head 408, and the pump head 408 can pump out liquid, the output end of the engine 304 is fixedly connected to the input shaft of the pump head 408, and the input end of the pump head 408 is fixedly connected with a water inlet pipe 409, and the water inlet pipe 409 has a connecting function, wherein a connecting pipe 410 is fixedly connected between the two automatic valves 405, and the connecting pipe 410 can play a connecting function, and the inner sides of the other two automatic valves 405 are fixedly connected with a drain pipe 411, and the drain pipe 411 facilitates the mounting cylinder 401 to discharge liquid, the external part of the mounting frame 2 is fixedly connected with a water tank 412, and the water tank 412 has a liquid storage function, and the water inlet pipe 410 is fixedly connected to the external part of the mounting frame 2. 09 One end away from the pump head 408 is fixedly connected to the outside of the water tank 412, the output end of the pump head 408 is fixedly connected to the outlet pipe 414, the outlet pipe 414 has a connecting function, the side of the outlet pipe 414 away from the pump head 408 is fixedly connected to the external bottom end of the connecting pipe 410, the top of the water tank 412 is fixedly connected to the water injection pipe 413, the top of the water injection pipe 413 is threadedly connected with a threaded cover, the outside of the mounting cylinder 401 is fixedly connected to the auxiliary rod 407, the two auxiliary rods 407 are fixedly connected to the outside of the water tank 412 at one end away from the mounting cylinder 401, the output end of the engine 304 can drive the pump head 408 to start after rotation, the pump head 408 draws liquid from the inside of the water tank 412 through the water inlet pipe 409, and pumps liquid out through the outlet The water pipe 414 is drawn into the interior of the connecting pipe 410. At this time, the liquid will enter the interior of the two mounting tubes 401 through the connecting tube 410, and one of the automatic valves 405 is closed, and then the limit ring 402 can be pushed upward, and the movable rod 403 is driven to move upward. When the movable rod 403 moves downward, two of the automatic valves 405 are closed and the other two automatic valves 405 are opened. At this time, the liquid can enter the interior of the water tank 412 through the drain pipe 411, and no liquid enters the interior of the mounting tube 401. At this time, under the action of gravity and the spring 404, the limit ring 402 can slide downward, and since the liquid takes time to flow, the limit ring 402 can move slowly downward to prevent the descending speed from being too large.

[0031] The washing and drying mechanism 5 includes an installation box 501, which provides an installation position. The installation box 501 is internally rotatably connected to an impeller 502, which can rotate under the action of water flow. One end of the impeller 502 is fixedly connected to a rotating shaft 503, which has a connecting function. The end of the rotating shaft 503 away from the impeller 502 is fixedly connected to a fan 504, and the fan 504 can rotate when the rotating shaft 503 rotates. Both ends of the outside of the installation box 501 are fixedly connected to fixed bent rods 505, and an installation frame 506 is fixedly connected between the two fixed bent rods 505. The fixed bent rod 505 can install the fixed installation frame 506, and one end of the fan 504 is rotatably connected to the inside of the installation frame 506. On the side, the inner side of the mounting frame 506 is fixedly connected with an electric heating wire 507, and the electric heating wire 507 can generate heat. The outer side of the rotating shaft 503 is rotatably connected to the bottom of one of the movable rods 403. The bottom of the mounting box 501 is fixedly connected with a three-way valve 508, and one end of the three-way valve 508 is fixedly connected with a drainage hose 509. The end of the drainage hose 509 away from the three-way valve 508 is fixedly connected to the outside of the water tank 412. The bottom of the other movable rod 403 is fixedly connected with a water spray head 510, and the end of the water spray head 510 away from the mounting box 501 is fixedly connected with a connecting hose 511. The connecting hose 511 has the function of connecting liquids, and the end of the connecting hose 511 away from the water spray head 510 is fixedly connected to the bottom of the three-way valve 508. The outside of the installation box 501 is fixedly connected with a water hose 512, and the water hose 512 has a connecting function. The top of the water hose 512 is fixedly connected to the external bottom end of the connecting pipe 410, and the external rotation of the rotating shaft 503 is connected to one end of the installation box 501 close to the water spray head 510. The side of the installation box 501 close to the water spray head 510 is fixedly connected to the external bottom end of the movable rod 403. As the movable rod 403 moves up and down, the rotating shaft 503 and the water spray head 510 can be driven to move up and down. When drying separately, close one end of the three-way valve 508 to pass into the connecting hose 511. When the liquid enters the interior of the installation box 501 through the water hose 512, it can drive the impeller 502 to rotate and enter The liquid inside the installation box 501 can enter the water tank 412 through the drainage hose 509. After the impeller 502 rotates, it can drive the rotating shaft 503 to rotate. After the rotating shaft 503 rotates, it can drive the fan 504 to rotate, thereby generating wind. When the electric heating wire 507 is started, heat can be generated, and then hot air can be generated in cooperation with the rotating fan 504, so that the auger drill head 306 can be dried. If flushing is required, first open the three-way valve 508 to one end of the connecting hose 511, and close the end of the drainage hose 509. At this time, the water flow will enter the interior of the sprinkler head 510 through the connecting hose 511 and spray out, and then the auger drill head 306 can be flushed.

[0032] Working principle: When digging a hole on the ground, the motor 301 is first started. After the output end of the motor 301 rotates, it can drive the threaded rod 302 to rotate. After the threaded rod 302 rotates, it can drive the sliding frame 303 to move downward. After the sliding frame 303 moves downward, it can drive the engine 304 and the transmission 305 to move downward. After the transmission 305 moves downward, it drives the auger drill head 306 to move downward. At this time, the engine 304 is turned on. After the output end of the engine 304 rotates, it drives the transmission 305 to rotate through the belt. After the transmission 305 rotates, it can drive the auger drill head 306 to rotate. Therefore, as the auger drill head 306 rotates and moves downward, the digging of the ground hole can be completed. When the digging is completed, the engine 304 is turned off and the motor 301 is started at the same time. As the threaded rod 302 rotates in the opposite direction, the sliding frame 303, the engine 304, the transmission 305 and the auger drill head 306 move upward, thereby completing the digging of the ground hole.

[0033] After the output end of the engine 304 rotates, it can drive the pump head 408 to start, and the pump head 408 draws liquid from the inside of the water tank 412 through the water inlet pipe 409, and draws it into the inside of the connecting pipe 410 through the water outlet pipe 414. At this time, the liquid will enter the inside of the two installation cylinders 401 through the connecting pipe 410, and one of the automatic valves 405 is closed, and then the limit ring 402 can be pushed upward, and the movable rod 403 can be driven to move upward. When the movable rod 403 moves downward, two of the automatic valves 405 are closed, and the other two automatic valves 405 are opened. At this time, the liquid can enter the inside of the water tank 412 through the drain pipe 411, and no liquid enters the inside of the installation cylinder 401. At this time, under the action of gravity and the spring 404, the limit ring 402 can slide downward, and because the liquid needs time to flow, the limit ring 402 can move slowly downward to prevent the descending speed from being too large;

[0034] As the movable rod 403 moves up and down, the rotating shaft 503 and the water spray head 510 can be driven to move up and down. When drying alone, close the three-way valve 508 to pass through one end of the connecting hose 511. When the liquid enters the interior of the installation box 501 through the water hose 512, it can drive the impeller 502 to rotate, and the liquid entering the interior of the installation box 501 can enter the interior of the water tank 412 through the drainage hose 509. After the impeller 502 rotates, it can drive the rotating shaft 503 to rotate, and the rotating shaft 503 rotates. After the rotation, it can drive the fan 504 to rotate, thereby generating wind. When the electric heating wire 507 is started, it can generate heat, and then it can cooperate with the rotating fan 504 to generate hot air, so it can dry the auger drill head 306. If flushing is required, first open the three-way valve 508 to one end of the connecting hose 511, and close the end of the drain hose 509. At this time, the water flow will enter the interior of the sprinkler head 510 through the connecting hose 511 and spray out, and then the auger drill head 306 can be flushed.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pit digging machine for forestry seedling planting, comprising a base frame (1), characterized in that: A mounting frame (2) is fixedly connected to one side of the top of the base frame (1); a digging mechanism (3) is arranged outside the mounting frame (2); an up-and-down movable mechanism (4) is arranged at the top of the outside of the mounting frame (2); a flushing and drying mechanism (5) is arranged at the bottom of the up-and-down movable mechanism (4); the digging mechanism (3) is used to dig holes in the ground; the up-and-down movable mechanism (4) can drive the flushing and drying mechanism (5) to move, thereby cleaning and drying the digging mechanism (3).

2. A pit digging machine for forestry seedling planting according to claim 1, characterized in that: The digging mechanism (3) comprises an electric motor (301), the bottom of the electric motor (301) is fixedly connected to the top of the mounting frame (2), the output end of the electric motor (301) is fixedly connected to a threaded rod (302), the outer portion of the threaded rod (302) is threadedly connected to a sliding frame (303), the two ends of the sliding frame (303) are respectively slidably connected to the two ends of the mounting frame (2), the outer portion of the sliding frame (303) is detachably connected to an engine (304), the outer portion of the sliding frame (303) is fixedly connected to a transmission (305), the output end of the transmission (305) is fixedly connected to an auger drilling head (306), and a belt is sleeved between the input end of the transmission (305) and the output end of the engine (304).

3. A pit digging machine for forestry seedling planting according to claim 2, characterized in that: The upper and lower movable mechanism (4) comprises two mounting cylinders (401), the interior of the mounting cylinder (401) is slidably connected to a limit ring (402), the bottom of the limit ring (402) is fixedly connected to a movable rod (403), a spring (404) is fixedly connected between the inner bottom end of the mounting cylinder (401) and the inside of the movable rod (403), two automatic valves (405) are fixedly connected to the outer bottom end of the mounting cylinder (401), the top of the mounting cylinder (401) is fixedly connected to a mounting bent rod (406), the tops of the two mounting bent rods (406) are respectively fixedly connected to the outer top end of the mounting frame (2), the outside of the sliding frame (303) is fixedly connected to a pump head (408), and the engine (3 04) is fixedly connected to the input shaft of the pump head (408), the input end of the pump head (408) is fixedly connected to an inlet pipe (409), wherein a connecting pipe (410) is fixedly connected between two of the automatic valves (405), and the inner sides of the other two automatic valves (405) are fixedly connected to a drain pipe (411), the outside of the mounting frame (2) is fixedly connected to a water tank (412), one end of the inlet pipe (409) away from the pump head (408) is fixedly connected to the outside of the water tank (412), the output end of the pump head (408) is fixedly connected to an outlet pipe (414), and the side of the outlet pipe (414) away from the pump head (408) is fixedly connected to the outer bottom end of the connecting pipe (410).

4. A pit digging machine for forestry seedling planting according to claim 3, characterized in that: The washing and drying mechanism (5) comprises a mounting box (501), the interior of the mounting box (501) is rotatably connected to an impeller (502), one end of the impeller (502) is fixedly connected to a rotating shaft (503), one end of the rotating shaft (503) away from the impeller (502) is fixedly connected to a fan (504), both ends of the exterior of the mounting box (501) are fixedly connected to fixed curved rods (505), a mounting frame (506) is fixedly connected between the two fixed curved rods (505), one end of the fan (504) is rotatably connected to the inner side of the mounting frame (506), the inner side of the mounting frame (506) is fixedly connected to a heating wire (507), the exterior of the rotating shaft (503) is rotatably connected to the bottom of one of the movable rods (403), and the mounting frame (506) is fixedly connected to the inner side of the mounting frame (506). A three-way valve (508) is fixedly connected to the bottom of the box (501), one end of the three-way valve (508) is fixedly connected to a drainage hose (509), one end of the drainage hose (509) away from the three-way valve (508) is fixedly connected to the outside of the water tank (412), a water spray head (510) is fixedly connected to the bottom of the other movable rod (403), one end of the water spray head (510) away from the installation box (501) is fixedly connected to a connecting hose (511), one end of the connecting hose (511) away from the water spray head (510) is fixedly connected to the bottom of the three-way valve (508), the outside of the installation box (501) is fixedly connected to a water hose (512), the top end of the water hose (512) is fixedly connected to the outer bottom end of the connecting pipe (410).

5. A pit digging machine for forestry seedling planting according to claim 2, characterized in that: The top end of the threaded rod (302) is externally rotatably connected to the middle of the top end of the mounting frame (2), and the bottom end of the threaded rod (302) is rotatably connected to the top of the base frame (1).

6. A pit digging machine for forestry seedling planting according to claim 3, characterized in that: A water injection pipe (413) is fixedly connected to the top of the water tank (412), and a threaded cover is threadedly connected to the top of the water injection pipe (413).

7. A pit digging machine for forestry seedling planting according to claim 3, characterized in that: An auxiliary rod (407) is fixedly connected to the outside of the installation cylinder (401), and one end of the two auxiliary rods (407) away from the installation cylinder (401) is fixedly connected to the outside of the water tank (412).

8. The hole digging machine for forestry seedling planting according to claim 4, characterized in that: The outer end of the rotating shaft (503) is rotatably connected to one end of the installation box (501) close to the water spray head (510), and the side of the installation box (501) close to the water spray head (510) is fixedly connected to the outer bottom end of the movable rod (403).

9. The pit digging machine for forestry seedling planting according to claim 3, characterized in that: The side of the base frame (1) away from the pit digging mechanism (3) is rotatably connected to two rotating wheels (6), and the bottom of the water tank (412) is fixedly connected to the top of the base frame (1).

10. The pit digging machine for forestry seedling planting according to claim 1, characterized in that: The four bottom corners of the base frame (1) are fixedly connected with soil nails (7), the two ends of the top of the mounting frame (2) are fixedly connected with handles (8), and two stabilizing rods (9) are detachably connected between the outside of the mounting frame (2) and the outside of the base frame (1).

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