Long-distance transportation hydraulic system for loading machine

Abstract

The long-distance transportation hydraulic system for the loading machine comprises a hydraulic control multi-way valve, a pilot handle, a rotating bucket oil cylinder, a movable arm oil cylinder and an anti-explosion valve, the hydraulic control multi-way valve, the pilot handle, the rotating bucket oil cylinder, the movable arm oil cylinder and the anti-explosion valve are connected through hydraulic pipelines, and the anti-explosion valve is used for sealing a large-cavity oil way of the rotating bucket oil cylinder. The pilot handle is used for controlling opening and closing of the anti-explosion valve; when the hydraulic control multi-way valve returns to the middle way from the bucket receiving position, the anti-explosion valve closes the large-cavity oil way of the rotating bucket oil cylinder; and when the hydraulic control multi-way valve returns to the bucket unloading position from the middle position, the pilot handle opens the anti-explosion valve to ensure that the large cavity of the rotating bucket oil cylinder returns oil. According to the utility model, the anti-explosion valve is additionally arranged on the transfer bucket oil cylinder pipeline of the hydraulic system of the loader; when a user operates the loader to conduct long-distance transfer operation, the anti-explosion valve can seal an oil way of the rotating bucket oil cylinder, it is guaranteed that internal leakage of the hydraulic control multi-way valve does not affect the pressure of a large cavity of the rotating bucket oil cylinder, it is guaranteed that a bucket does not shake in the transfer process of the loader, and therefore the working efficiency of the whole loader is improved.

Description

Technical Field

[0001] This utility model relates to a long-distance transportation hydraulic system for loaders, belonging to the field of loader technology. Background Technology

[0002] Currently, loaders commonly use the following method for long-distance transport operations: the main valve bucket hydraulic circuit is directly connected to the large and small chamber oil ports of the bucket hydraulic cylinder (e.g., Figure 1 According to the system principle, due to internal leakage in both the bucket cylinder and the main valve, prolonged transportation will lead to a decrease in the pressure in the large chamber of the bucket cylinder. Simultaneously, during transportation, the bucket limit block may detach from the boom limit block (e.g., Figure 2 This causes the bucket to shake, resulting in material spillage and affecting the overall working efficiency of the machine. Utility Model Content

[0003] The technical problem this invention aims to solve is that, due to internal leakage in both the bucket cylinder and the main valve of the loader, prolonged transportation can lead to a decrease in the pressure of the large chamber of the bucket cylinder. At the same time, during transportation, the bucket limit block may detach from the boom limit block, causing the bucket to shake, resulting in material spillage and affecting the overall working efficiency of the machine.

[0004] To solve the above-mentioned technical problems, this utility model provides a long-distance transportation hydraulic system for loaders, which ensures that the shovel does not shake or spill material during long-distance operation of the loader, improves the overall efficiency of the machine's transportation operation, and has a compact structure, is easy to install, and is inexpensive.

[0005] To achieve the above-mentioned technical objectives and effects, this application provides the following technical solution:

[0006] A long-distance transport hydraulic system for a loader includes a hydraulically controlled multi-way valve, a pilot handle, a bucket cylinder, a boom cylinder, and an explosion-proof valve. The hydraulically controlled multi-way valve, pilot handle, bucket cylinder, boom cylinder, and explosion-proof valve are connected by hydraulic pipelines. The explosion-proof valve is used to close the large-cavity oil circuit of the bucket cylinder, and the pilot handle is used to control the opening and closing of the explosion-proof valve.

[0007] Preferably, when the hydraulic control multi-way valve returns from the collecting position to the middle position, the explosion-proof valve closes the large chamber oil circuit of the bucket rotating cylinder;

[0008] When the hydraulic control multi-way valve returns from the neutral position to the unloading position, the pilot handle opens the explosion-proof valve to ensure oil return to the large chamber of the bucket cylinder.

[0009] Preferably, the pilot handle is a pilot control valve.

[0010] The hydraulic system for long-distance transportation in loaders provided by this utility model has the following advantages:

[0011] 1. When this utility model is used, it ensures that the shovel does not shake or spill material during long-distance operation of the loader, thereby improving the overall efficiency of the machine's transport operation.

[0012] 2. This utility model is inexpensive to use and has a simple structure, requiring only the addition of an explosion-proof valve.

[0013] 3. This utility model is easy to use and promote, and can be easily switched to on the original system with minimal modifications. At the same time, due to its price advantage, it is easily accepted by customers. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a long-distance transport hydraulic system for existing loaders;

[0015] Figure 2 This is a schematic diagram of a structure in the prior art where the bucket limiting block and boom limiting block may detach during transportation.

[0016] Figure 3 This is a schematic diagram of the structure of a long-distance transportation hydraulic system for a loader according to the present invention;

[0017] In the picture:

[0018] 1-Hydraulic multi-way valve; 2-Pilot handle; 3-Dump cylinder; 4-Boom cylinder; 5-Explosion-proof valve. Detailed Implementation

[0019] 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 utility model, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Reference Figure 3 A long-distance transport hydraulic system for a loader includes a hydraulically controlled multi-way valve 1, a pilot handle 2, a bucket cylinder 3, a boom cylinder 4, and an explosion-proof valve 5. The hydraulically controlled multi-way valve 1, pilot handle 2, bucket cylinder 3, boom cylinder 4, and explosion-proof valve 5 are connected by hydraulic pipelines. The hydraulically controlled multi-way valve 1, pilot handle 2, bucket cylinder 3, and boom cylinder 4 can use existing parts without modification. The pilot handle 2 is a pilot control valve.

[0021] During long-distance transport operations, the explosion-proof valve 5 seals the oil circuit of the main chamber of the bucket cylinder 3, ensuring that the pressure in the main chamber of the bucket cylinder 3 does not decrease. The explosion-proof valve 5 seals the oil circuit of the main chamber of the bucket cylinder 3 when the hydraulic multi-way valve 1 returns from the bucket retraction position to the neutral position, and opens the explosion-proof valve 5 via the pilot handle 2 when the hydraulic multi-way valve 1 returns from the neutral position to the bucket unloading position, ensuring oil return to the main chamber of the bucket cylinder 3. With the addition of the explosion-proof valve 5, this system can seal the oil circuit of the main chamber of the bucket cylinder 3 to ensure that the oil pressure does not decrease, and at the same time, it can prevent the oil circuit from bursting due to overload impact of the bucket.

[0022] An explosion-proof valve 5 is added to the pipeline of the bucket cylinder 3 in the hydraulic system of the loader. When the user operates the loader for long-distance transportation, the explosion-proof valve 5 can close the oil circuit of the bucket cylinder 3, ensuring that the internal leakage of the hydraulic control multi-way valve 1 will not affect the pressure of the large chamber of the bucket cylinder 3, and ensuring that the bucket of the loader does not shake during transportation, thereby improving the working efficiency of the whole machine.

[0023] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art without departing from the spirit and scope of this utility model using the disclosed technical content are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model are still within the scope of the technical solution of this utility model.

Claims

1. A long-distance transport hydraulic system for a loader, characterized in that, The device includes a hydraulic multi-way valve (1), a pilot handle (2), a bucket cylinder (3), a boom cylinder (4), and an explosion-proof valve (5). The hydraulic multi-way valve (1), pilot handle (2), bucket cylinder (3), boom cylinder (4), and explosion-proof valve (5) are connected by hydraulic pipelines. The explosion-proof valve (5) is used to close the large-cavity oil circuit of the bucket cylinder (3), and the pilot handle (2) is used to control the opening and closing of the explosion-proof valve (5).

2. The long-distance transportation hydraulic system for a loader as described in claim 1, characterized in that, When the hydraulic control multi-way valve (1) returns from the collecting position to the middle position, the explosion-proof valve (5) closes the large chamber oil circuit of the rotating cylinder (3); When the hydraulic control multi-way valve (1) returns from the neutral position to the unloading position, the pilot handle (2) opens the explosion-proof valve (5) to ensure that the large chamber of the rotating cylinder (3) returns oil.

3. The long-distance transportation hydraulic system for a loader as described in claim 1, characterized in that, The pilot handle (2) is a pilot control valve.

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