Distribution valve for duplex control of container lifting and top cover opening and closing and control system

Abstract

The utility model belongs to the technical field of distribution valves, and particularly relates to a distribution valve for duplex control of container lifting and top cover opening and closing and a control system, the distribution valve comprises an oil path structure, the oil path structure is provided with a main oil inlet, a main oil return port, a lifting oil outlet, a cover closing oil pipe port and a cover opening oil pipe port; the oil way structure is connected with the container lifting valve body and the top cover opening and closing valve body, and the container lifting valve body is used for enabling the lifting oil outlet to be communicated with the main oil inlet or the main oil return opening or enabling the lifting oil outlet to be communicated with the top cover opening and closing valve body. The top cover opening and closing valve body is used for enabling a main oil inlet passing through the container lifting valve body to be communicated with a cover closing oil pipe opening or a cover opening oil pipe opening, a distribution valve combination multi-way control valve driven by a duplex gear pump is simplified into a duplex control integrated distribution valve capable of meeting the driving requirement through a single gear pump, two ways of control are integrated on one valve body, and therefore two ways of control are integrated on the valve body. A simplified hydraulic system is achieved, the number of split functional valve bodies is reduced, oil way mixing is avoided, and fault points are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of distribution valves, and particularly relates to a distribution valve and a control system for double-link control of cargo box lifting and top cover opening and closing. Background Technique

[0002] In the transportation field, especially in transportation tools such as trucks, the lifting of the cargo box and the opening and closing of the top cover are common operations. Traditional hydraulic systems require independent control devices to operate the cargo box lifting and top cover opening and closing respectively, that is, each of the two control systems for cargo box lifting and top cover opening and closing requires a set of gear pumps and corresponding control valve groups. This not only increases the complexity of the system, but also raises the cost and the difficulty of maintenance. Therefore, it is particularly important to develop a system that can simplify control and reduce costs. Content of the Utility Model

[0003] To solve the problem of the complex hydraulic system for the lifting of the cargo box and the opening and closing of the top cover, the utility model provides a distribution valve and a control system for double-link control of cargo box lifting and top cover opening and closing.

[0004] The purpose of the utility model is achieved in the following way: A distribution valve for double-link control of cargo box lifting and top cover opening and closing includes an oil circuit structure, and a total oil inlet 15, a total oil return port 16, a lifting oil outlet 14, a closing cover oil pipe port 9, and an opening cover oil pipe port 10 are arranged on the oil circuit structure; the oil circuit structure is respectively connected to a cargo box lifting valve body 1 and a top cover opening and closing valve body 4, wherein,

[0005] The cargo box lifting valve body 1 is used to connect the lifting oil outlet 14 to the total oil inlet 15 or the total oil return port 16, or to connect the lifting oil outlet 14 to the top cover opening and closing valve body 4;

[0006] The top cover opening and closing valve body 4 is used to connect the total oil inlet 15 passing through the cargo box lifting valve body 1 to the closing cover oil pipe port 9 or the opening cover oil pipe port 10.

[0007] Further, the cargo box lifting valve body 1 is a three-position four-way valve, including an oil inlet P, the oil inlet P is connected to the total oil inlet 15 and an oil return port T through an oil circuit, the oil return port T is connected to the total oil return port 16 and an oil port A through an oil circuit, the oil port A is connected to the lifting oil outlet 14 and an oil port B through an oil circuit, and the oil port B is connected to the top cover opening and closing valve body 4 through an oil circuit;

[0008] One of the working positions of the cargo box lifting valve body 1 is that the oil port A is connected to the oil return port T and the oil inlet P is connected to the oil port B;

[0009] The second working position of the cargo box lifting valve body 1 is that the oil inlet P is connected to the oil port B and both the oil port A and the oil return port T are closed;

[0010] The third working position of the cargo box lifting valve body 1 is that the oil inlet P is connected to the oil port A and both the oil port B and the oil return port T are closed.

[0011] Further, the top cover opening and closing valve body 4 is a three-position five-way valve, including an oil inlet p. The oil inlet p is connected to the oil port B of the cargo box lifting valve body 1 and the oil return port t through an oil path. The oil return port t is connected to the total oil return port 16 and the oil port a through an oil path. The oil port a is connected to the open cover oil pipe port 10 and the oil port b through an oil path. The oil port b is connected to the total oil return port 16 and the oil port c through an oil path. The oil port c is connected to the close cover oil pipe port 9 through an oil path;

[0012] One working position of the top cover opening and closing valve body 4 is that the oil inlet p is communicated with the oil port c, the oil port a is communicated with the oil return port t, and the oil port b is closed;

[0013] The second working position of the top cover opening and closing valve body 4 is that the oil inlet p is communicated with the oil port b, and the oil ports a, c and t are all closed;

[0014] The third working position of the top cover opening and closing valve body 4 is that the oil inlet p is communicated with the oil port a, the oil port c is communicated with the oil return port t, and the oil port b is closed.

[0015] Further, a top cover safety valve 12 is arranged between the oil path from the oil port B to the oil inlet p and the oil path from the oil return port t to the total oil return port 16; a lifting safety valve 13 is arranged between the oil path from the total oil inlet 15 to the oil inlet P and the oil path from the oil return port T to the total oil return port 16.

[0016] A control system including the distribution valve as described above further includes a hydraulic oil tank 100. The hydraulic oil tank 100 is connected to a gear pump 200 through an oil path, and the gear pump 200 is connected to the total oil inlet 15 through an oil path;

[0017] The lifting oil outlet 14 is connected to a lifting oil cylinder 400 through an oil path;

[0018] The open cover oil pipe port 10 is connected to the rodless cavity of the top cover oil cylinder 900 through an oil path, and the close cover oil pipe port 9 is connected to the rod cavity of the top cover oil cylinder 900 through an oil path. A two-way balance valve 700 is arranged on the oil path between the open cover oil pipe port 10, the close cover oil pipe port 9 and the top cover oil cylinder 900;

[0019] The total oil return port 16 is connected to the hydraulic oil tank 100 through an oil path.

[0020] Further, both the cargo box lifting valve body 1 and the top cover opening and closing valve body 4 are pneumatic valves. The cargo box lifting valve body 1 includes a lowering air port 2 and a lifting air port 3. The lowering air port 2 and the lifting air port 3 are both connected to a proportional control air valve 600 through an air path. Among them, a first limit air valve 500 is arranged on the air path between the lifting air port 3 and the proportional control air valve 600;

[0021] The top cover opening and closing valve body 4 is connected to a second limit air valve 800 through an air path.

[0022] Compared with the prior art, the utility model simplifies the distribution valve combination multi-way control valve driven by a double gear pump into an integrated distribution valve with a single gear pump that can meet the double control drive, integrates the two-way control on one valve body. In this way, the hydraulic system is simplified, the functional valve bodies for sub-assembly are reduced, the oil circuits are prevented from being mixed, and the fault points are reduced. Description of the Drawings

[0023] Figure 1 It is the oil and gas circuit diagram of the control system, where the solid line is the oil circuit and the dotted line is the gas circuit;

[0024] Figure 2 is Figure 1 the enlarged view of the distribution valve in

[0025] Figure 3 the structural schematic diagram of the distribution valve;

[0026] Figure 4 the top view of the distribution valve;

[0027] Figure 5 the bottom view of the distribution valve.

[0028] Among them, 100 is the hydraulic oil tank, 200 is the gear pump, 300 is the distribution valve, 400 is the lifting cylinder, 500 is the first limit air valve, 600 is the proportional control air valve, 700 is the two-way balance valve, 800 is the second limit air valve, 900 is the top cover cylinder;

[0029] 1 is the cargo box lifting valve body, 2 is the lowering air port, 3 is the lifting air port, 4 is the top cover opening and closing valve body, 5 is the closing cover air port, 6 is the opening cover air port, 7 is the top cover speed regulating valve, 8 is the spare oil outlet, 9 is the closing cover oil pipe port, 10 is the opening cover oil pipe port, 11 is the top cover pressure measuring port, 12 is the top cover safety valve, 13 is the lifting safety valve, 14 is the lifting oil outlet, 15 is the total oil inlet, 16 is the total oil return port, 17 is the lifting speed regulating bolt. Detailed Embodiment

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0031] In the present utility model, unless otherwise clearly specified and defined, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0032] As shown in the attached Figures 2 - 5 figures, a distribution valve for double-link control of cargo box lifting and top cover opening and closing includes an oil circuit structure. A total inlet port 15, a total return port 16, a lifting outlet port 14, a closing pipe port 9, and an opening pipe port 10 are provided on the oil circuit structure. The oil circuit structure is respectively connected to a cargo box lifting valve body 1 and a top cover opening and closing valve body 4. Among them,

[0033] the cargo box lifting valve body 1 is used to connect the lifting outlet port 14 to the total inlet port 15 or the total return port 16, or to connect the lifting outlet port 14 to the top cover opening and closing valve body 4;

[0034] the top cover opening and closing valve body 4 is used to connect the total inlet port 15 passing through the cargo box lifting valve body 1 to the closing pipe port 9 or the opening pipe port 10.

[0035] Specifically, as Figures 3 - 5 shown in the figures, the above-mentioned oil circuit structure is an integral structure, and all oil circuits are integrated in the entire oil circuit module. The cargo box lifting valve body 1 and the top cover opening and closing valve body 4 are fixed on one side of the oil circuit module, and the valve core penetrates into the oil circuit module to work.

[0036] Furthermore, the cargo box lifting valve body 1 is a three-position four-way valve, including an inlet port P. The inlet port P is connected to the total inlet port 15 and a return port T through an oil circuit. The return port T is connected to the total return port 16 and an oil port A through an oil circuit. The oil port A is connected to the lifting outlet port 14 and an oil port B through an oil circuit. The oil port B is connected to the top cover opening and closing valve body 4 through an oil circuit;

[0037] One of the working positions of the cargo box lifting valve body 1 is that the oil port A is connected to the return port T, and the inlet port P is connected to the oil port B. When in this working position, the lifting oil cylinder 400 returns oil, the cargo box retracts, and at the same time, it does not affect the oil supply to the top cover opening and closing valve body 4;

[0038] The second working position of the cargo box lifting valve body 1 is that the inlet port P is connected to the oil port B, and both the oil port A and the return port T are closed. When in this working position, only the oil supply to the top cover opening and closing valve body 4 is ensured, the top cover opening and closing valve body 4 can work normally, the oil in the lifting oil cylinder 400 is sealed, and the lifting oil cylinder 400 is locked;

[0039] The third working position of the cargo box lifting valve body 1 is that the oil inlet P is connected, the oil ports A and B are closed, and the oil return port T is closed. When in this working position, oil enters the lifting cylinder 400, and the lifting cylinder 400 performs the cargo box lifting action, and the top cover opening and closing valve body 4 cannot work.

[0040] The purpose of this setting is that when the lifting cylinder 400 performs the cargo box lifting action, the top cover cannot be opened or closed. This is because when the cargo box is lifted, if the top cover makes an opening and closing movement, the overall outward movement is relatively large, and the user needs to be distracted to control it, which poses a greater safety hazard; when the lifting cylinder 400 is locked or retracted, the top cover can be normally opened and closed.

[0041] Furthermore, the top cover opening and closing valve body 4 is a three-position five-way valve, including an oil inlet p. The oil inlet p is connected to the oil port B of the cargo box lifting valve body 1 and the oil return port t through an oil circuit. The oil return port t is connected to the total oil return port 16 and the oil port a through an oil circuit. The oil port a is connected to the open cover oil pipe port 10 and the oil port b through an oil circuit. The oil port b is connected to the total oil return port 16 and the oil port c through an oil circuit. The oil port c is connected to the close cover oil pipe port 9 through an oil circuit.

[0042] One working position of the top cover opening and closing valve body 4 is that the oil inlet p is connected, the oil port c is connected, the oil port a is connected to the oil return port t, and the oil port b is closed. When in this working position, the rod chamber of the top cover cylinder 900 is filled with oil, and the rodless chamber returns oil, and the top cover cylinder 900 retracts.

[0043] The second working position of the top cover opening and closing valve body 4 is that the oil inlet p is connected, the oil ports a, c, and t are all closed. When in this working position, the top cover cylinder 900 is locked and does not work.

[0044] The third working position of the top cover opening and closing valve body 4 is that the oil inlet p is connected, the oil port c is connected to the oil return port t, and the oil port b is closed. When in this working position, the rod chamber of the top cover cylinder 900 returns oil, the rodless chamber is filled with oil, the top cover cylinder 900 extends, and the top cover opens.

[0045] Furthermore, a top cover safety valve 12 is provided between the oil circuit from the oil port B to the oil inlet p and the oil circuit from the oil return port t to the total oil return port 16; a lifting safety valve 13 is provided between the oil circuit from the total oil inlet 15 to the oil inlet P and the oil circuit from the oil return port T to the total oil return port 16. Preferably, a top cover speed regulating valve 7 is provided between the oil circuit at the inlet of the top cover safety valve 12 and the oil circuit at the outlet of the oil return port t. Through the above settings, the flow rate can be adjusted according to actual use, thereby adjusting the speeds of the cargo box lifting and the top cover opening and closing. The structures of the safety valve and the speed regulating valve themselves belong to the prior art and will not be elaborated here.

[0046] Furthermore, as shown in the appendix Figure 1As shown, the control system including the above-mentioned distribution valve comprises a hydraulic oil tank 100. The hydraulic oil tank 100 is connected to a gear pump 200 through an oil circuit, and the gear pump 200 is connected to a main oil inlet 15 through an oil circuit, that is, the oil supply for two hydraulic systems is completed by a single pump.

[0047] The lifting oil outlet 14 is connected to a lifting cylinder 400 through an oil circuit.

[0048] An open cover oil pipe port 10 is connected to the rodless cavity of a top cover cylinder 900 through an oil circuit, and a close cover oil pipe port 9 is connected to the rod chamber of the top cover cylinder 900 through an oil circuit. A two-way balance valve 700 is provided on the oil circuit between the open cover oil pipe port 10, the close cover oil pipe port 9 and the top cover cylinder 900. The structure of the two-way balance valve 700 itself belongs to the prior art and will not be elaborated here.

[0049] The main oil return port 16 is connected to the hydraulic oil tank 100 through an oil circuit.

[0050] Furthermore, both the cargo box lifting valve body 1 and the top cover opening and closing valve body 4 are pneumatic valves. The cargo box lifting valve body 1 includes a lowering air port 2 and a lifting air port 3. Both the lowering air port 2 and the lifting air port 3 are connected to a proportional control air valve 600 through an air circuit. Among them, a first limit air valve 500 is provided on the air circuit between the lifting air port 3 and the proportional control air valve 600. The proportional control air valve 600 is preferably a manual control valve.

[0051] The top cover opening and closing valve body 4 is connected to a second limit air valve 800 through an air circuit.

[0052] The top cover opening and closing valve body 4 can also be as Figure 2 shown, with air ports controlled by solenoid valves designed at the close cover air port 5 and the open cover air port 6. Preferably, the opening and closing of the solenoid valves are controlled by a control unit according to operation instructions, so as to achieve precise control of the cargo box lifting and the top cover opening and closing.

[0053] The structures of the above-mentioned proportional control air valve 600 and limit air valve itself belong to the prior art and will not be elaborated here.

[0054] To realize the lifting of the cargo box, the lowering air port 2 and the lifting air port 3 are adjusted through a manual control valve to control the cargo box lifting valve body 1, so that the main oil inlet 15 of the oil circuit entering the cylinder is connected to the lifting oil outlet 14, and the top cover opening and closing valve body 4 is not connected to the oil circuit, and there is no operation for the top cover switch.

[0055] To realize the opening and closing of the top cover, adjust the cargo box lifting valve body 1 to lock or retract the lifting cylinder 400, control the top cover opening and closing valve body 4 to make the close cover oil pipe port 9 and the open cover oil pipe port 10 open and close immediately. While the top cover oil circuit is working, the lifting cylinder 400 is not affected, and the lowering air port 2 and the lifting air port 3 are still independently controlled by the manual control valve. The main oil inlet 15 and the lifting oil outlet 14 are still in a connected or locked state, so as to realize the independent operation of the top cover opening and closing and the cargo box lifting.

[0056] When the cargo box falls back and the top cover closes, either simultaneously or independently, the hydraulic oil returns to the hydraulic oil tank through the oil circuit 16 to achieve hydraulic oil recovery.

[0057] Compared with the prior art, the utility model has the following beneficial effects:

[0058] 1. The independent control of the cargo box lifting and the top cover opening and closing is realized through a single gear pump, which simplifies the system structure.

[0059] 2. The oil circuit is controlled by the air circuit, reducing the complexity of the hydraulic system and lowering the cost.

[0060] 3. It is easy to maintain and repair. Due to the simple structure, the number of failure points is reduced and the maintenance cost is lowered.

[0061] The above are only the preferred embodiments of the utility model. It should be noted that for those skilled in the art, without departing from the overall concept of the utility model, several changes and improvements can still be made, and these should also be regarded as the protection scope of the utility model.

Claims

1. A dual-control distribution valve for lifting the cargo box and opening and closing the top cover, characterized in that: The invention comprises an oil circuit structure, wherein the oil circuit structure is provided with a main oil inlet (15), a main oil return port (16), a lifting oil outlet (14), a cover closing oil pipe port (9), and a cover opening oil pipe port (10); the oil circuit structure is respectively connected to a cargo box lifting valve body (1) and a top cover opening and closing valve body (4), wherein: The cargo box lifting valve body (1) is used to connect the lifting oil outlet (14) to the main oil inlet (15) or the main oil return port (16), or to connect the lifting oil outlet (14) to the top cover opening and closing valve body (4); The top cover opening and closing valve body (4) is used to connect the main oil inlet (15) through the cargo box lifting valve body (1) to the cover closing oil pipe port (9) or the cover opening oil pipe port (10).

2. A dual-control distribution valve for lifting the cargo box and opening and closing the top cover as claimed in claim 1, characterized in that: The cargo box lifting valve body (1) is a three-position four-way valve, comprising an oil inlet P, the oil inlet P is connected to the main oil inlet (15) and the oil return port T through an oil circuit, the oil return port T is connected to the main oil return port (16) and the oil port A through an oil circuit, the oil port A is connected to the lifting oil outlet (14) and the oil port B through an oil circuit, and the oil port B is connected to the top cover opening and closing valve body (4) through an oil circuit; One of the working positions of the cargo box lifting valve body (1) is that the oil port A is connected to the oil return port T, and the oil inlet port P is connected to the oil port B; The second working position of the cargo box lifting valve body (1) is that the oil inlet P is connected to the oil port B, and the oil port A and the oil return port T are both closed; The third working position of the cargo box lifting valve body (1) is that the oil inlet P is connected to the oil port A, and the oil port B and the oil return port T are all closed.

3. A dual-control distribution valve for lifting the cargo box and opening and closing the top cover as claimed in claim 2, characterized in that: The top cover opening and closing valve body (4) is a three-position five-way valve, comprising an oil inlet p, the oil inlet p being connected to the oil port B and the oil return port t of the cargo box lifting valve body (1) through an oil circuit, the oil return port t being connected to the total oil return port (16) and the oil port a through an oil circuit, the oil port a being connected to the cover opening oil pipe port (10) and the oil port b through an oil circuit, the oil port b being connected to the total oil return port (16) and the oil port c through an oil circuit, and the oil port c being connected to the cover closing oil pipe port (9) through an oil circuit; One of the working positions of the top cover opening and closing valve body (4) is that the oil inlet port p is connected to the oil port c, the oil port a is connected to the oil return port t, and the oil port b is closed; The second working position of the top cover opening and closing valve body (4) is that the oil inlet port p is connected to the oil port b, and the oil port a, the oil port c and the oil port t are all closed; The third working position of the top cover opening and closing valve body (4) is that the oil inlet port p is connected to the oil port a, the oil port c is connected to the oil return port t, and the oil port b is closed.

4. A dual-control distribution valve for lifting the cargo box and opening and closing the top cover as claimed in claim 3, characterized in that: A top cover safety valve (12) is provided between the oil circuit from the oil port B to the oil inlet port P and the oil circuit from the oil return port T to the total oil return port (16); a lifting safety valve (13) is provided between the oil circuit from the total oil inlet port (15) to the oil inlet port P and the oil circuit from the oil return port T to the total oil return port (16).

5. A control system comprising a distribution valve according to any one of claims 1 to 4, characterized in that: It also includes a hydraulic oil tank (100), the hydraulic oil tank (100) is connected to a gear pump (200) via an oil circuit, and the gear pump (200) is connected to a main oil inlet (15) via an oil circuit; The lifting oil outlet (14) is connected to the lifting oil cylinder (400) through an oil circuit; The opening cover oil pipe port (10) is connected to the rodless chamber of the top cover oil cylinder (900) through an oil circuit, and the closing cover oil pipe port (9) is connected to the rod chamber of the top cover oil cylinder (900) through an oil circuit. A two-way balancing valve (700) is provided on the oil circuit between the opening cover oil pipe port (10), the closing cover oil pipe port (9) and the top cover oil cylinder (900); The main oil return port (16) is connected to the hydraulic oil tank (100) through an oil circuit.

6. The control system according to claim 5, characterized in that: The cargo box lifting valve body (1) and the top cover opening and closing valve body (4) are both pneumatic valves. The cargo box lifting valve body (1) comprises a descending air port (2) and a lifting air port (3). The descending air port (2) and the lifting air port (3) are both connected to a proportional control air valve (600) via an air path. A first limit air valve (500) is provided on the air path between the lifting air port (3) and the proportional control air valve (600). The top cover opening and closing valve body (4) is connected to the second limit position air valve (800) via an air path.

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