Garbage compression truck hydraulic system capable of preventing misoperation

Abstract

The utility model discloses a garbage compression truck hydraulic system capable of preventing misoperation. The garbage compression truck hydraulic system comprises a hydraulic oil tank, an oil pump set connected in series and installed in parallel and a multi-way valve. The hydraulic oil tank provides two oil ways for the multi-way valve through the oil pump set which is connected in series and installed in parallel. The multi-way valve provides two oil inlets P1 and P2 to be connected with a series parallel oil pump set, the multi-way valve provides oil outlets A4, B4, A5 and B5 to be independently communicated with the oil inlet P2, and the multi-way valve provides high-pressure oil outlets A1, B1, A2, B2, A3 and B3 to be communicated with the oil inlets P2 and P1 at the same time; according to the multi-way valve, the multi-piece structural form is adopted, and after flow of the oil pumps which can be combined, connected in series and installed in parallel is gathered, the action speed of the push shovel oil cylinder, the scraper oil cylinder and the sliding plate oil cylinder is increased, so that oil cylinder actions under different flows are achieved, and the risk of safety accidents caused by misoperation when an operator manually operates the multi-way valve can be prevented; and besides convenient processing, the overall stability of the structure is higher, and abnormal sound can be reduced during use.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle hydraulic systems, in particular to a hydraulic system for a garbage compression vehicle which can prevent misoperation. Background Art

[0002] The garbage compression truck is a special vehicle product for garbage collection and transportation in the sanitation industry. It can mainly compress and collect garbage, thereby improving the transportation efficiency of domestic garbage. The main functions and actions of the garbage truck are: the push shovel extends and retracts, the scraper scrapes in and reverses, the slide rises and falls, the bucket lifts and falls back, and the bucket lock hook locks and releases. These functions and actions mainly have two sets of mutual interference problems, namely: 1. When the push shovel is extended, the bucket must be in the lifted state; 2. When the bucket lock hook is locked, the bucket must be in the fallen state; otherwise, the corresponding functions and actions cannot be operated. If the rigid operation is performed, the structural action will interfere with the functions and actions, resulting in functional disorders and even personal and property safety accidents.

[0003] In the current industry, most of the electronic control systems that use electric travel switches to control the multi-way valves perform reversing operations on the oil valve group, thereby achieving the correct logic of the various functions and actions of the garbage compactor to ensure the safety of the functions and actions. However, it is inevitable that the multi-way valve handle is directly operated due to human overstepping. When the operator directly uses the manual handle to operate the multi-way valve of the garbage compactor, it is very easy to cause the push shovel to push out when the hopper is not lifted into place, or the lock hook to lock when the hopper is not in place due to human error, resulting in safety accidents. Utility Model Content

[0004] The utility model aims to provide a hydraulic system for a garbage compression vehicle which can prevent misoperation, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a hydraulic system for a garbage compression vehicle that can prevent misoperation, comprising a hydraulic oil tank, a series-connected and mounted oil pump group, and a multi-way valve;

[0006] The hydraulic oil tanks are connected in series and equipped with oil pump groups to provide two oil circuits for the multi-way valve;

[0007] The multi-way valve provides two oil inlets, P1 and P2, to be connected to the series parallel oil pump group. The multi-way valve provides A4, B4, A5 and B5 oil outlets to be connected to the P2 oil inlet separately. The multi-way valve provides A1, B1, A2, B2, A3 and B3 high-pressure oil outlets to be connected to the P2 and P1 oil inlets at the same time.

[0008] Among them, the A1 and B1 oil outlets are connected to the push-blade cylinder, and the first machine-controlled one-way valve is connected to the passage between the A1 oil outlet and the push-blade cylinder, the A2 and B2 oil outlets are connected to the scraper rotating cylinder, the A3 and B3 oil outlets are connected to the skateboard sliding cylinder, the A4 and B4 oil outlets are connected to the trash can flipping cylinder, the A5 and B5 oil outlets are connected to the hopper locking cylinder and the hopper lifting cylinder, and a second machine-controlled one-way valve is provided on the passage between the A5 oil outlet and the hopper locking cylinder.

[0009] Preferably, the multi-way valve is composed of three three-position four-way parallel valves and two three-position four-way parallel valves.

[0010] Preferably, one end of the first machine-controlled one-way valve is connected to a dozer back-pressure valve.

[0011] Preferably, the trash can tipping cylinder is connected to a two-way balancing valve.

[0012] Preferably, a bidirectional hydraulic lock is connected to the passage between the oil outlets A5 and B5 and the hopper locking cylinder.

[0013] Preferably, a one-way throttle valve is installed on the passage between the B5 oil outlet and the hopper lifting cylinder.

[0014] Preferably, the output end of the one-way throttle valve is connected to an electromagnetic one-way valve.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model has a multi-piece structure and can combine the flow of the oil pumps installed in series to accelerate the movement speed of the shovel cylinder, the scraper cylinder and the skateboard cylinder, thereby realizing the movement of the cylinders under different flow rates, and can prevent the risk of safety accidents caused by misoperation of the operator when manually operating the multi-way valve. In addition to being easy to process, the overall stability of the structure is also higher, and abnormal noise can be reduced during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 This is a schematic diagram of the installation of the valve pressing device of the utility model. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1 as well as Figure 2 As shown, it includes a hydraulic oil tank 1, which is mainly used to store the hydraulic oil required by the hydraulic system, and can keep the heat generated by the hydraulic system in a balanced state during operation through the outer surface of the hydraulic oil tank, so that the hydraulic system can work normally within a reasonable temperature range;

[0021] Series-connected oil pump group 2: Provides two high-pressure oils with different flow rates for the hydraulic system

[0022] and a multi-way valve 3;

[0023] The hydraulic oil tank 1 is connected in series and equipped with an oil pump group 2 to provide two oil circuits for the multi-way valve 3;

[0024] The multi-way valve 3 provides two oil inlets P1 and P2 to be connected to the series parallel oil pump group 2, the multi-way valve 3 provides A4, B4, A5 and B5 oil outlets to be connected to the P2 oil inlet separately, and the multi-way valve 3 provides A1, B1, A2, B2, A3 and B3 high-pressure oil outlets to be connected to the P2 and P1 oil inlets at the same time;

[0025] Among them, the oil outlets A1 and B1 are connected to the push-blade oil cylinder. The passage between the oil outlet A1 and the push-blade oil cylinder is connected with a first mechanically controlled one-way valve 5, the oil outlets A2 and B2 are connected to the scraper rotating oil cylinder, the oil outlets A3 and B3 are connected to the slide plate sliding oil cylinder, the oil outlets A4 and B4 are connected to the trash can flipping oil cylinder, the oil outlets A5 and B5 are connected to the hopper locking oil cylinder and the hopper lifting oil cylinder, and the passage between the oil outlet A5 and the hopper locking oil cylinder is provided with a second mechanically controlled one-way valve 7.

[0026] The multi-way valve 3 is composed of 3 pieces of three-position four-way parallel valves and 2 pieces of three-position four-way parallel valves, and the multi-way valve 3 has two high-pressure oil inlets P1 and P2, which correspond to the high-pressure oil outlets of the oil pump assembly 2, which are connected in series and installed in series, so that the high-pressure oil of the oil inlet of P2 can only flow out from the high-pressure oil outlets of A4, B4 and A5, B5, and at the same time, the high-pressure oil of the oil inlets of P1 and P2 can be combined and flow out from the high-pressure oil outlets of A1, B1 and A2, B2 and A3, B3, so as to accelerate the movement speed of the push shovel oil cylinder, scraper oil cylinder and slide plate oil cylinder. When the A1 port is discharging oil, if the first machine-controlled one-way valve 5 (detecting that the hopper is lifted in place) can only make the oil circuit in a smooth state when the hopper is lifted in place, so as to realize the push shovel pushing action, otherwise when the hopper is not lifted in place, the first machine-controlled one-way valve 5 (detecting that the hopper is lifted in place) does not connect the oil circuit because the valve core is not changed.

[0027] Continue to refer to Figure 1As shown, one end of the first machine-controlled one-way valve 5 is connected to a shovel back pressure valve 4, and the trash can flip cylinder is connected to a two-way balance valve 6. A two-way hydraulic lock 8 is connected to the passage between the A5 and B5 oil outlets and the hopper locking cylinder, and a one-way throttle valve 9 is installed on the passage between the B5 oil outlet and the hopper lifting cylinder. The output end of the one-way throttle valve 9 is connected to an electromagnetic one-way valve 10.

[0028] The working principle of the first machine-controlled one-way valve 5 is as follows: an actuator is installed on the hopper, and the actuator rotates together with the hopper, and the first machine-controlled one-way valve 5 is fixed at a specific position of the frame. When the hopper is lifted into place, the actuator (i.e. Figure 2 The pressing device in the first machine-controlled one-way valve 5 can just trigger the machine-controlled part (equivalent to a switch) of the first machine-controlled one-way valve 5, thereby realizing the control of the valve core of the first machine-controlled one-way valve 5.

[0029] The working principle of the second machine-controlled one-way valve 7 is also consistent with it. An actuator is installed on the hopper, and the actuator rotates together with the hopper to fix the second machine-controlled one-way valve 7 at a specific position of the frame. When the hopper falls back into place, the actuator can just trigger the machine control part (equivalent to a switch) of the second machine-controlled one-way valve 7, thereby realizing the control of the valve core of the second machine-controlled one-way valve 7. That is, when the hopper falls back into place, the locking passage of the hopper locking cylinder is unblocked.

[0030] 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 hydraulic system for a garbage compression vehicle that can prevent misoperation, characterized in that: It comprises a hydraulic oil tank (1), a series-connected oil pump group (2) and a multi-way valve (3); The hydraulic oil tank (1) is connected in series and equipped with an oil pump group (2) to provide two oil circuits for the multi-way valve (3); The multi-way valve (3) provides two oil inlets P1 and P2 to be connected to the series parallel oil pump group (2); the multi-way valve (3) provides A4, B4, A5 and B5 oil outlets to be connected to the P2 oil inlet separately; the multi-way valve (3) provides A1, B1, A2, B2, A3 and B3 high-pressure oil outlets to be connected to the P2 and P1 oil inlets at the same time; Among them, the oil outlets A1 and B1 are connected to the push-blade cylinder, and a first machine-controlled non-return valve (5) is connected to the passage between the oil outlet A1 and the push-blade cylinder, the oil outlets A2 and B2 are connected to the scraper rotating cylinder, the oil outlets A3 and B3 are connected to the slide plate sliding cylinder, the oil outlets A4 and B4 are connected to the trash can turning cylinder, the oil outlets A5 and B5 are connected to the hopper locking cylinder and the hopper lifting cylinder, and a second machine-controlled non-return valve (7) is provided on the passage between the oil outlet A5 and the hopper locking cylinder.

2. A hydraulic system for garbage compacting vehicles capable of preventing misoperation according to claim 1, characterized in that: The multi-way valve (3) is composed of three three-position four-way parallel valves and two three-position four-way parallel valves.

3. A hydraulic system for garbage compacting vehicles capable of preventing misoperation according to claim 1, characterized in that: One end of the first machine-controlled one-way valve (5) is connected to a bulldozer back-pressure valve (4).

4. A hydraulic system for garbage compacting vehicles capable of preventing misoperation according to claim 1, characterized in that: The trash can tipping cylinder is connected to a two-way balancing valve (6).

5. The hydraulic system for garbage compacting vehicles capable of preventing misoperation according to claim 1, characterized in that: A bidirectional hydraulic lock (8) is connected to the passage between the oil outlets A5 and B5 and the hopper locking cylinder.

6. A garbage compression truck hydraulic system capable of preventing misoperation according to claim 1, characterized in that: A one-way throttle valve (9) is installed on the passage between the B5 oil outlet and the hopper lifting cylinder.

7. A hydraulic system for garbage compacting vehicles capable of preventing misoperation according to claim 5, characterized in that: The output end of the one-way throttle valve (9) is connected to an electromagnetic one-way valve (10).

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