Tree pit measuring device and measuring method

Abstract

The invention discloses a tree pit measuring device and method, and relates to the field of forestry planting. A tree pit measuring device comprises a supporting frame and further comprises a measuring rod connected to the supporting frame in a lifting mode, sliding grooves are formed in the two ends of the measuring rod, and sliding rods are connected into the sliding grooves in a sliding mode; the pressure applying block is fixedly connected with the end part of the sliding rod; the graduated scale is fixedly connected to the measuring rod; the measuring sleeve is connected to the graduated scale in a sliding manner; one end of the pull rod is fixedly connected with the measuring sleeve, and the other end of the pull rod is fixedly connected with the sliding rod; while the depth of the tree pit is measured, the diameter of the tree pit can be measured synchronously, the efficiency of measuring the depth and the diameter of the tree pit is improved, and whether the overall diameter of the tree pit is consistent or not can be detected by measuring the diameters of different depths of the tree pit. The tree pits are prevented from being big-end-up or small-end-down in diameter, and root system damage during planting is prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of forestry planting, and specifically relates to a tree pit measuring device and a measuring method. Background Art

[0002] Forestry refers to the production department that protects the ecological environment, maintains ecological balance, cultivates and protects forests to obtain timber and other forest products, and utilizes the natural characteristics of forest trees to play a protective role, and is an important part of the national economy.

[0003] During the process of forestry planting, it is often necessary to dig tree pits on the ground. In order to prevent the diameter of the tree pits from being dug too large or too small, which may affect the growth of the trees, it is necessary to measure the diameter of the tree pits during excavation.

[0004] Currently, in the prior art, a ruler is mostly used to measure the diameter of the tree pits. However, when measuring the diameter of deeper tree pits, since the diameters at different depths of the tree pits may vary, it is not convenient for the staff to measure the diameters at different depths of the tree pits with a ruler after measuring the diameter of the tree pit opening. In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a tree pit measuring device and a measuring method that can overcome the above problems or at least partially solve the above problems.

[0006] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0007] A tree pit measuring device includes a support frame, and further includes: a measuring rod that is vertically connected to the support frame. Both ends of the measuring rod are provided with chutes, and a sliding rod is slidably connected in the chutes; a pressing block fixedly connected to the end of the sliding rod; a scale fixedly connected to the measuring rod; a measuring sleeve slidably connected to the scale; a pull rod, one end of which is fixedly connected to the measuring sleeve, and the other end is fixedly connected to the sliding rod.

[0008] To drive the measuring rod to move up and down, preferably, electric telescopic rods are symmetrically and fixedly installed on the support frame. The output ends of the electric telescopic rods penetrate through the support frame and are fixedly connected to the measuring rod.

[0009] Preferably, a pipe I communicating with the chute is fixedly connected to the measuring rod, and a solenoid valve is arranged on the pipe I.

[0010] Preferably, a tension spring is further included. The tension spring is arranged in the chute, one end of which is fixedly connected to the sliding rod, and the other end is fixedly connected to the inner wall of the chute.

[0011] To facilitate the drainage of water remaining in the chute, preferably, a second pipe is further included. The second pipe is fixedly connected to the measuring rod and communicates with the chute. A valve switch is provided on the second pipe.

[0012] To detect whether the soil on the inner wall of the tree pit is loose, further, a detection cavity is formed in the sliding rod. The detection cavity is fixedly communicated with the chute through a first pressure relief pipe. A pressure relief valve is provided on the first pressure relief pipe. A sealing block is slidably connected in the detection cavity. A second spring is fixedly connected between the detection cavity and the sealing block. A second pressure relief pipe fixedly communicated with the detection cavity is provided on the sliding rod. A pressure relief valve is provided on the second pressure relief pipe. A hollow cavity communicated with the detection cavity is formed in the pressing block. A water spraying hole communicated with the hollow cavity is formed in the pressing block.

[0013] To facilitate the staff to judge whether the soil on the inner wall of the tree pit is loose, further, a first conductive ring, a second conductive ring and a warning device are further included. The first conductive ring is fixedly connected in the detection cavity. The second conductive ring is fixedly connected with the sealing block. The warning device is fixedly installed on the support frame. A controller and a storage battery are fixedly installed on the support frame. The controller is electrically connected to the storage battery through the first conductive ring and the second conductive ring. The warning device is electrically connected to the storage battery through the controller.

[0014] To achieve the purpose of measuring the depth of the tree pit, further, a measuring cylinder is fixedly connected to the support frame. A piston disk is slidably connected in the measuring cylinder. A first spring is fixedly connected between the piston disk and the inner wall of the measuring cylinder. A top rod is fixedly connected to the piston disk. One end of the top rod away from the piston disk penetrates through the measuring cylinder. Scale marks are provided on the measuring cylinder. The measuring rod is sleeved on the outer wall of the measuring cylinder. A water injection pipe is fixedly communicated with the measuring cylinder. A one-way valve is provided on the water injection pipe. One end of the first pipe close to the solenoid valve is fixedly communicated with the measuring cylinder.

[0015] To achieve the effect of increasing the sealing performance of the measuring cylinder, further, a sealing ring is provided on the measuring cylinder. The sealing ring is attached to the outer wall of the top rod.

[0016] A measuring method of a tree pit measuring device is operated by the following steps:

[0017] Step 1: Before measuring the diameter and depth of the tree pit, first externally connect a water pump and a water storage tank, inject water into the measuring cylinder through the water injection pipe, and push the piston disk to slide upward to compress the first spring;

[0018] Step 2: After an appropriate amount of water is reserved in the measuring cylinder, disassemble and separate the water injection pipe from the output end of the water pump;

[0019] Step 3: Horizontally cover the support frame on the tree pit, and then move the measuring rod downward. When the measuring rod moves to the mouth of the tree pit, open the solenoid valve so that the piston disc moves downward in the measuring cylinder and squeezes water to be transported into the chute through Pipe 1;

[0020] Step 4: When the piston disc slides downward in the measuring cylinder, the ejector rod moves downward synchronously with the piston disc until the end of the ejector rod abuts against the bottom of the tree pit;

[0021] Step 5: The water pressurized into the chute pushes the sliding rod to move out of the chute until the pressing block on the end of the sliding rod abuts against the soil on the inner wall of the tree pit. At the same time, the measuring sleeve moves synchronously with the sliding rod through the pull rod on the scale;

[0022] Step 6: The excess water continuously fed into the chute is discharged to the outside through the pressure relief pipe 1. When the pressure relief pipe 1 stops draining water to the outside, the measurement of the diameter and depth of the tree pit is completed;

[0023] Step 7: The length of the ejector rod sliding out of the measuring cylinder can be measured through the scale markings on the measuring cylinder. Since the length of the measuring cylinder is a fixed value, the depth of the tree pit can be calculated based on the length of the measuring cylinder and the measured length of the ejector rod sliding out of the measuring cylinder;

[0024] Step 8: The length of the sliding rod sliding out of the chute can be measured through the scale. Since the length of the measuring rod is a fixed value, the diameter of the tree pit can be calculated based on the length of the measuring rod and the measured length of the sliding rod sliding out of the chute.

[0025] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0026] In the present invention, while measuring the depth of the tree pit, the diameter of the tree pit can be measured synchronously, which improves the efficiency of measuring the depth and diameter of the tree pit. And by measuring the diameters at different depths of the tree pit, it can be detected whether the overall diameter of the tree pit is consistent, avoiding the situation where the diameter of the tree pit is larger at the top and smaller at the bottom or smaller at the top and larger at the bottom, so as to prevent root damage during planting. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the structural schematic of the present invention Figure 1 ;

[0028] Figure 2 is the structural schematic of the present invention Figure 2 ;

[0029] Figure 3 is the cross-sectional view of the measuring cylinder and the measuring rod of the present invention;

[0030] Figure 4 is the cross-sectional view of the measuring rod, the sliding rod and the pressing block of the present invention;

[0031] Figure 5 is a schematic diagram of a partial structure of the present invention;

[0032] Figure 6 is a cross-sectional view of the measuring cylinder and the water injection pipe of the present invention;

[0033] Figure 7 is of the present invention Figure 3 an enlarged view of part A therein;

[0034] Figure 8 is of the present invention Figure 4 an enlarged view of part B therein;

[0035] Figure 9 is of the present invention Figure 4 an enlarged view of part C therein.

[0036] In the figure: 1, support frame; 2, measuring cylinder; 201, piston disc; 202, ejector rod; 203, sealing ring; 204, first spring; 205, water injection pipe; 3, measuring rod; 301, chute; 302, sliding rod; 303, pressing block; 304, first pipe; 305, solenoid valve; 306, first pressure relief pipe; 307, scale; 308, measuring sleeve; 309, pull rod; 310, tension spring; 4, detection cavity; 401, sealing block; 402, second spring; 403, hollow cavity; 404, water spraying hole; 405, second pressure relief pipe; 5, first conductive ring; 501, second conductive ring; 502, warning device; 503, controller; 504, storage battery; 6, second pipe; 601, valve switch; 7, electric telescopic rod. Specific embodiments

[0037] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0038] Embodiment 1: Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , a tree pit measuring device includes a support frame 1, and further includes: a measuring rod 3 that is vertically connected to the support frame 1. Both ends of the measuring rod 3 are provided with chutes 301, and sliding rods 302 are slidably connected in the chutes 301; a pressing block 303 fixedly connected to the end of the sliding rod 302; a scale 307 fixedly connected to the measuring rod 3; a measuring sleeve 308 slidably connected to the scale 307; a pull rod 309, one end of which is fixedly connected to the measuring sleeve 308 and the other end is fixedly connected to the sliding rod 302.

[0039] Electric telescopic rods 7 are symmetrically and fixedly installed on the support frame 1. The output ends of the electric telescopic rods 7 penetrate through the support frame 1 and are fixedly connected to the measuring rod 3.

[0040] A first pipe 304 communicating with the chute 301 is fixedly connected to the measuring rod 3, and a solenoid valve 305 is arranged on the first pipe 304.

[0041] A tension spring 310 is further included. The tension spring 310 is arranged in the chute 301. One end of the tension spring 310 is fixedly connected to the sliding rod 302, and the other end is fixedly connected to the inner wall of the chute 301.

[0042] A measuring cylinder 2 is fixedly connected to the support frame 1. A piston disc 201 is slidably connected in the measuring cylinder 2. A first spring 204 is fixedly connected between the piston disc 201 and the inner wall of the measuring cylinder 2. A push rod 202 is fixedly connected to the piston disc 201. The end of the push rod 202 away from the piston disc 201 penetrates through the measuring cylinder 2. Scale marks are arranged on the measuring cylinder 2. The measuring rod 3 is sleeved on the outer wall of the measuring cylinder 2. A water injection pipe 205 is fixedly communicated with the measuring cylinder 2. A one-way valve is arranged on the water injection pipe 205. One end of the first pipe 304 close to the solenoid valve 305 is fixedly communicated with the measuring cylinder 2.

[0043] Before measuring the diameter and depth of the tree pit, first externally connect a water pump and a water storage tank. Then connect the input end of the water pump to the water storage tank and the output end to the water injection pipe 205 by means of a flange. Subsequently, start the water pump. The water pump sucks the water in the water storage tank and transports it into the measuring cylinder 2 through the water injection pipe 205. The one-way valve arranged on the water injection pipe 205 enables the water transported into the measuring cylinder 2 to push the piston disc 201 to slide upward in the measuring cylinder 2 and compress the first spring 204. At the same time, the push rod 202 moves synchronously with the piston disc 201, so as to achieve the effect of storing water in the measuring cylinder 2. After an appropriate amount of water is stored in the measuring cylinder 2, disassemble the flange to separate the water injection pipe 205 from the output end of the water pump;

[0044] After the above preparations for measuring the diameter and depth of the tree pit are completed, first cover the support frame 1 horizontally on the tree pit, and then start the electric telescopic rod 7. The electric telescopic rod 7 pushes the measuring rod 3 downward. When the measuring rod 3 moves to the edge of the tree pit, by opening the solenoid valve 305 on the first pipeline 304, the compressed first spring 204 generates a thrust force, pushing the piston disc 201 downward, and squeezing the water in the measuring cylinder 2 to be transported into the chute 301 through the first pipeline 304. A one-way valve is provided on the first pipeline 304, so as to achieve water supply and pressure increase into the chute 301. At the same time, when the piston disc 201 slides downward in the measuring cylinder 2, the ejector rod 202 moves downward synchronously with the piston disc 201 until the end of the ejector rod 202 abuts against the bottom of the tree pit. At the same time, the water pressurized into the chute 301 pushes the sliding rod 302 to move out of the chute 301 and stretches the tension spring 310 until the pressing block 303 on the end of the sliding rod 302 abuts against the soil on the inner wall of the tree pit, so that the sliding rod 302 can no longer move out of the chute 301. At this time, the excess water continuously transported into the chute 301 is discharged to the outside through the first pressure relief pipe 306, and the water remaining in the chute 301, in cooperation with the tension spring 310, can play a role in limiting and fixing the sliding rod 302. At the same time, when the sliding rod 302 moves out of the chute 301, the measuring sleeve 308 moves synchronously with the sliding rod 302 on the scale 307 through the pull rod 309. Then, when the first pressure relief pipe 306 stops discharging water to the outside, the measurement of the diameter and depth of the tree pit is completed. Subsequently, close the solenoid valve 305 on the first pipeline 304, so that the water remaining in the measuring cylinder 2, in cooperation with the first spring 204, can play a role in limiting and fixing the piston disc 201 and the ejector rod 202. Subsequently, take out the measuring device from the tree pit;

[0045] Based on the above, the length of the ejector rod 202 sliding out of the measuring cylinder 2 can be measured through the scale mark on the measuring cylinder 2. Since the length of the measuring cylinder 2 is a fixed value, therefore, according to the length of the measuring cylinder 2 and the measured length of the ejector rod 202 sliding out of the measuring cylinder 2, the depth of the tree pit can be calculated. And the length of the sliding rod 302 sliding out of the chute 301 can be measured through the scale 307. Since the length of the measuring rod 3 is a fixed value, therefore, according to the length of the measuring rod 3 and the measured length of the sliding rod 302 sliding out of the chute 301, the diameter of the tree pit can be calculated. In summary, in the present invention, while measuring the depth of the tree pit, the diameter of the tree pit can be measured synchronously, thereby improving the efficiency of measuring the depth and diameter of the tree pit. Then, by repeatedly repeating the above operation steps for measuring the diameter of the tree pit, but before each measurement, the electric telescopic rod 7 pushes the measuring rod 3 to descend a certain distance, the diameter of the tree pit at different depths can be measured, so as to detect whether the overall diameter of the tree pit is consistent, and avoid the situation that the diameter of the tree pit is larger at the top and smaller at the bottom or smaller at the top and larger at the bottom, so as to prevent root damage during planting.

[0046] It should be noted that the first pipeline 304 adopts a stretchable and shrinkable hose, so the first pipeline 304 will not interfere with the up and down movement of the measuring rod 3;

[0047] One end of the first pressure relief pipe 306 away from the chute 301 adopts a stretchable and shrinkable hose, so the first pressure relief pipe 306 will not interfere with the sliding of the sliding rod 302.

[0048] It should be added that the diameter of the measuring cylinder 2 is much larger than the diameter of the chute 301. Therefore, the distance that the ejector rod 202 moves downward until it abuts against the inner wall of the bottom of the tree pit is sufficient to push the pressure block 303 on the end of the sliding rod 302 to abut against the inner wall of the tree pit.

[0049] Embodiment 2: Refer to Figure 2 、 Figure 4 、 Figure 5 and Figure 9 A tree pit measuring device is basically the same as that in Embodiment 1. Further, a detection cavity 4 is formed on the sliding rod 302. The detection cavity 4 is fixedly communicated with the chute 301 through the first pressure relief pipe 306. A pressure relief valve is arranged on the first pressure relief pipe 306. A sealing block 401 is slidably connected in the detection cavity 4. A second spring 402 is fixedly connected between the detection cavity 4 and the sealing block 401. A second pressure relief pipe 405 fixedly communicated with the detection cavity 4 is arranged on the sliding rod 302. A pressure relief valve is arranged on the second pressure relief pipe 405. A hollow cavity 403 communicated with the detection cavity 4 is formed in the pressure block 303. A water spraying hole 404 communicated with the hollow cavity 403 is formed in the pressure block 303.

[0050] Based on Embodiment 1, when part of the water in the chute 301 is discharged through the first pressure relief pipe 306, it is then conveyed into the detection cavity 4. A one-way valve is arranged on the first pressure relief pipe 306, so as to achieve water conveyance and pressure increase into the detection cavity 4. If the soil where the pressure block 303 abuts against the inner wall of the tree pit is relatively loose, the water pressurized into the detection cavity 4 can then be conveyed into the water spraying hole 404 through the hollow cavity 403 and sprayed out, and seep into the soil. If the soil where the pressure block 303 abuts against the inner wall of the tree pit is relatively compact, the water pressurized into the detection cavity 4 cannot be well conveyed into the water spraying hole 404 through the hollow cavity 403 and sprayed out. Therefore, the water continuously conveyed into the detection cavity 4 will push the sealing block 401 to slide towards the side away from the pressure block 303 and compress the second spring 402. When the sealing block 401 passes over the second pressure relief pipe 405 and cannot slide further towards the side away from the pressure block 303 in the detection cavity 4, the excess water continuously conveyed into the detection cavity 4 is discharged through the second pressure relief pipe 405. In summary, the staff can know whether the soil on the inner wall of the tree pit is loose by observing whether water is discharged from the second pressure relief pipe 405 (it should be noted that if water is discharged from the second pressure relief pipe 405, it means that the soil on the inner wall of the tree pit is compact; if no water is discharged from the second pressure relief pipe 405, it means that the soil on the inner wall of the tree pit is loose).

[0051] Example 3: Refer to Figure 2 , Figure 3 , Figure 4 and Figure 9 , a tree pit measuring device, which is basically the same as that in Example 1. Further, it further includes a first conductive ring 5, a second conductive ring 501, and a warning device 502. The first conductive ring 5 is fixedly connected in the detection cavity 4, the second conductive ring 501 is fixedly connected to the sealing block 401, the warning device 502 is fixedly installed on the support frame 1, and a controller 503 and a storage battery 504 are fixedly installed on the support frame 1. The controller 503 is electrically connected to the storage battery 504 through the first conductive ring 5 and the second conductive ring 501, and the warning device 502 is electrically connected to the storage battery 504 through the controller 503.

[0052] Based on Example 2, if the soil against which the pressing block 303 abuts against the inner wall of the tree pit is relatively compact, then the water pressurized into the detection cavity 4 cannot be well transported through the hollow cavity 403 into the spray holes 404 and sprayed out. Therefore, the continuously transported water into the detection cavity 4 will push the sealing block 401 to drive the second conductive ring 501 to move closer to the first conductive ring 5 and compress the second spring 402. When the sealing block 401 crosses the second pressure relief pipe 405 and the second conductive ring 501 contacts the first conductive ring 5, it turns on the controller 503, and the controller 503 controls the warning device 502 to flash. Then, the excess water continuously transported into the detection cavity 4 is discharged through the second pressure relief pipe 405;

[0053] In summary, on the basis that the staff can know whether the soil on the inner wall of the tree pit is loose by observing whether water is discharged from the second pressure relief pipe 405, they can also know whether the soil on the inner wall of the tree pit is loose by observing whether the warning device 502 flashes (it should be noted that if the warning device 502 flashes, it means that the soil on the inner wall of the tree pit is compact, and if the warning device 502 does not flash, it means that the soil on the inner wall of the tree pit is loose), which improves the convenience for the staff to know whether the soil on the inner wall of the tree pit is loose.

[0054] Example 4: Refer to Figure 4 , Figure 8 , a tree pit measuring device, which is basically the same as that in Example 1. Further, it further includes a second pipeline 6. The second pipeline 6 is fixedly connected to the measuring rod 3 and communicates with the sliding groove 301. A valve switch 601 is provided on the second pipeline 6; after measuring the diameter and depth of the tree pit, by opening the valve switch 601 on the second pipeline 6, the stretched tension spring 310 contracts under its own elastic force, pulls the sliding rod 302 to move back into the sliding groove 301 to reset, and squeezes the water remaining in the sliding groove 301 to be discharged through the second pipeline 6, so as to facilitate the complete discharge of the water remaining in the sliding groove 301.

[0055] Example 5: Refer to Figure 7, a tree pit measuring device, which is basically the same as that in Embodiment 1. Further, a sealing ring 203 is provided on the measuring cylinder 2, and the sealing ring 203 is fitted to the outer wall of the ejector rod 202; when the water pump sucks the water in the water storage tank and conveys it into the measuring cylinder 2 through the water injection pipe 205, the water conveyed into the measuring cylinder 2 pushes the piston disc 201 to slide upward in the measuring cylinder 2 and compresses the first spring 204, the ejector rod 202 moves synchronously with the piston disc 201. At this time, through the sealing ring 203 being fitted to the outer wall of the ejector rod 202, the sealing performance of the measuring cylinder 2 is improved, preventing the water conveyed into the interior of the measuring cylinder 2 from leaking through the gap at the connection between the ejector rod 202 and the measuring cylinder 2, resulting in insufficient water pressure inside the measuring cylinder 2 and affecting the stable upward sliding of the water-pushed piston disc 201 in the measuring cylinder 2.

[0056] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, within the scope of the technical solution of the present invention.

Claims

1. A tree pit measuring device, comprising a support frame (1), characterized in that, Further included are: A measuring rod (3) which is vertically connected to the support frame (1); wherein, both ends of the measuring rod (3) are provided with chutes (301), and sliding rods (302) are slidably connected in the chutes (301); A pressing block (303) fixedly connected to the end of the sliding rod (302); A scale (307) fixedly connected to the measuring rod (3); A measuring sleeve (308) slidably connected to the scale (307); A pull rod (309) with one end fixedly connected to the measuring sleeve (308) and the other end fixedly connected to the sliding rod (302).

2. The tree pit measuring device according to claim 1, wherein, Electric telescopic rods (7) are symmetrically and fixedly installed on the support frame (1), the output ends of the electric telescopic rods (7) penetrate through the support frame (1) and are fixedly connected to the measuring rod (3).

3. The tree pit measuring device according to claim 2, characterized in that, A first pipe (304) communicating with the chute (301) is fixedly connected to the measuring rod (3), and a solenoid valve (305) is arranged on the first pipe (304).

4. The tree pit measuring device according to claim 1, characterized in that, A tension spring (310) is further included, the tension spring (310) is arranged in the chute (301), one end of the tension spring (310) is fixedly connected to the sliding rod (302), and the other end is fixedly connected to the inner wall of the chute (301).

5. The tree pit measuring device according to claim 1, characterized in that, A second pipe (6) is further included, the second pipe (6) is fixedly connected to the measuring rod (3) and communicates with the chute (301), and a valve switch (601) is arranged on the second pipe (6).

6. The tree pit measuring device according to claim 3, wherein, A detection cavity (4) is formed in the sliding rod (302), the detection cavity (4) is fixedly communicated with the chute (301) through a first pressure relief pipe (306), a pressure relief valve is arranged on the first pressure relief pipe (306), a sealing block (401) is slidably connected in the detection cavity (4), a second spring (402) is fixedly connected between the detection cavity (4) and the sealing block (401), a second pressure relief pipe (405) fixedly communicated with the detection cavity (4) is arranged on the sliding rod (302), a pressure relief valve is arranged on the second pressure relief pipe (405), a hollow cavity (403) communicating with the detection cavity (4) is formed in the pressing block (303), and a water spraying hole (404) communicating with the hollow cavity (403) is formed in the pressing block (303).

7. The tree pit measuring device according to claim 6, characterized in that, A first conductive ring (5), a second conductive ring (501), and a warning device (502) are further included, the first conductive ring (5) is fixedly connected in the detection cavity (4), the second conductive ring (501) is fixedly connected to the sealing block (401), the warning device (502) is fixedly installed on the support frame (1), a controller (503) and a storage battery (504) are fixedly installed on the support frame (1), the controller (503) is electrically connected to the storage battery (504) through the first conductive ring (5) and the second conductive ring (501), and the warning device (502) is electrically connected to the storage battery (504) through the controller (503).

8. The tree pit measuring device according to claim 7, wherein, A measuring cylinder (2) is fixedly connected to the support frame (1). A piston disc (201) is slidably connected inside the measuring cylinder (2). A first spring (204) is fixedly connected between the piston disc (201) and the inner wall of the measuring cylinder (2). A push rod (202) is fixedly connected to the piston disc (201). One end of the push rod (202) away from the piston disc (201) penetrates through the measuring cylinder (2). Scale marks are provided on the measuring cylinder (2). A measuring rod (3) is sleeved on the outer wall of the measuring cylinder (2). A water injection pipe (205) is fixedly communicated with the measuring cylinder (2). A one-way valve is provided on the water injection pipe (205). One end of the pipeline one (304) close to the solenoid valve (305) is fixedly communicated with the measuring cylinder (2).

9. The tree pit measuring device according to claim 8, characterized in that, A sealing ring (203) is provided on the measuring cylinder (2), and the sealing ring (203) is in fit with the outer wall of the push rod (202).

10. A measuring method of a tree pit measuring device as described in claim 8, characterized in that, The following steps are adopted for operation: Step 1: Before measuring the diameter and depth of the tree pit, first externally connect a water pump and a water storage tank, inject water into the measuring cylinder (2) through the water injection pipe (205), and push the piston disc (201) to slide upward to compress the first spring (204); Step 2: After an appropriate amount of water is stored in the measuring cylinder (2), disassemble and separate the water injection pipe (205) from the output end of the water pump; Step 3: Horizontally cover the support frame (1) on the tree pit, and then move the measuring rod (3) downward. When the measuring rod (3) moves to the mouth of the tree pit, open the solenoid valve (305) so that the piston disc (201) moves downward in the measuring cylinder (2), and squeeze the water to be conveyed into the chute (301) through the pipeline one (304); Step 4: When the piston disc (201) slides downward in the measuring cylinder (2), the push rod (202) moves downward synchronously with the piston disc (201) until the end of the push rod (202) abuts against the bottom of the tree pit; Step 5: The water pressurized into the chute (301) pushes the sliding rod (302) to move out of the chute (301) until the pressing block (303) at the end of the sliding rod (302) abuts against the soil on the inner wall of the tree pit. At the same time, the measuring sleeve (308) moves synchronously with the sliding rod (302) on the scale (307) through the pull rod (309); Step 6: The excess water continuously input into the chute (301) is discharged to the outside through the pressure relief pipe one (306). When the pressure relief pipe one (306) stops draining water to the outside, the measurement of the diameter and depth of the tree pit is completed; Step 7: The length of the push rod (202) sliding out of the measuring cylinder (2) can be measured through the scale marks on the measuring cylinder (2). Since the length of the measuring cylinder (2) is a fixed value, the depth of the tree pit can be calculated according to the length of the measuring cylinder (2) and the length of the push rod (202) sliding out of the measuring cylinder (2); Step 8: The length of the sliding rod (302) sliding out of the chute (301) can be measured through the scale (307). Since the length of the measuring rod (3) is a fixed value, the diameter of the tree pit can be calculated according to the length of the measuring rod (3) and the length of the sliding rod (302) sliding out of the chute (301).

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