Vacuum injection machine for tree trunks

Abstract

Disclosed is a vacuum injection machine for tree trunks. The injection machine comprises an injection gun and an injection needle. A gun nozzle, a gun body and a gun handle of the injection gun are in an integrated structure, an injection hole is opened in the injection nozzle and communicated with a piston cavity in the gun body, a piston rod is arranged in the piston cavity, a tail end of the piston rod stretching out of the gun body is connected with an operation rod, the piston cavity is further communicated with a liquid medicine storage device above the gun body, the gun nozzle and the gun body incline downward for 30 degrees to 45 degrees along a horizontal direction, and a vertical pipeline communicated with the piston cavity is arranged on the upper portion of the gun body and connected with the liquid medicine storage device. A one-way valve in the prior art is omitted by inclining the gun nozzle and the gun body downward for a certain angle along the horizontal direction; residual air in a tree hole and the injection gun body is discharged into the liquid medicine storage device through the vertical pipeline in the piston cavity; and accordingly, vacuum injection is achieved, injection resistance is effectively reduced, trunk injection efficiency is improved, and physical damages to trunk transfusion tissues are avoided.

Description

technical field [0001] The invention relates to a trunk injection machine in the field of agricultural and forestry machinery, in particular to a vacuum trunk injection machine. Background technique [0002] Existing tree trunk injection techniques include perfusion, high-pressure injection and implantation. The actual meaning of injection should be "pressurized injection", or the technology of introducing medicinal liquid into the trunk with a force higher than atmospheric pressure. In contrast, "perfusion" is relatively passive, and the practice has proved that the efficiency is relatively low. It is a technology to introduce medicinal liquid into the trunk by gravity or gravity and atmospheric pressure. "Implantation" means inserting or embedding a solid drug in a well made hole in the trunk, so in general, trunk injections performed with instruments are injections or infusions. [0003] The important obstacles to trunk injection are the physiological injury caused by in...

AI Technical Summary

Problems solved by technology

[0003] The important obstacles to trunk injection are the physiological injury caused by injection and the injection resistance. The air in the injection hole of the trunk and the air remaining in the injection machine are injected into the trunk together with the injection liquid, forming a "transpiration channel-duct, tracheid system". Air embolism, these air embolisms form more fine bubbles when they penetrate the pits under the push of injection pressure, which not only increases the range of blocked water transport channels, but also causes physiological damage caused by blockage of water transport channels, and also affects subsequent The injection produces huge resistance, forming a high injection pressure. Therefore, the patents for trunk injection machines currently applied for in my country are all high-pressure trunk injection machines, that is, the emphasis is on high-pressure injection, while ignoring how to reduce injection resistance, improve injection efficiency, and reduce injection injuries.

[0004] At present, the trunk injection machines in our country all use the injection head to seal in the tree body, forming a large injection tree hole, causing direct damage to the trunk, which is restricted in the application of economic forests, precious trees and fruit trees.

[0005] Chinese patent ZL01230479.4 is an improved trunk injection machine, and ZL2005201283610 is a trunk injection machine, both of which are converted into trunk injection machines from pedal sprayers. The injection hole is sealed in the tree with the injection head, which is easy to cause direct damage to the trunk. The equipment structure is relatively complicated, the manufacturing cost is high, and it has no practical application value.

[0006] Chinese patent ZL99243992.2 discloses a hand-held high-pressure quantitative tree trunk injection machine. The injection machine adopts a structure in which the liquid medicine barrel is integrated with the injection machine body, eliminating the need for liquid medicine delivery equipment, so that the structure is simple, the overall weight is reduced, and the operation is easy. , to adapt to various geographical environments, but it uses a one-way valve for high-pressure injection, and the air is difficult to discharge, causing physiological damage to the trunk and injection resistance

[0007] Chinese patent ZL02200104.2 discloses a non-injury in-line trunk injection machine, which includes an integrated gun body, an injection needle, and a liquid medicine storage device connected to the inner cavity of the gun body. A plunger is installed in the rear cavity of the gun body. The plunger is connected with the booster rod outside the gun body. There is a one-way drug valve in the front cavity of the gun body. An injection needle is connected to the front gun body. The sliding rod sleeved on the injection needle is connected to the rotary sleeve outside the gun body. There is an expansion ring in front of the lock cap and the slide rod of the needle. The injection machine is light in appearance, easy to operate, and saves effort. The injection aperture is small, the power consumption is small, the speed is fast, the injection hole heals quickly, and the seal is reliable during injection. Liquid leakage, but the principle is to use the one-way valve for high-pressure injection, which is likely to cause physiological damage to the trunk and injection resistance

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