An integrated multi-way valve

Abstract

An integrated multi-way valve. The problem of unreliable confluence switching of existing multi-way valves is solved. It includes a valve body, on which a first oil inlet, a second oil inlet, a first feedback oil circuit and a second feedback oil circuit are provided. The valve body includes a first working group, a second working group and a confluence. The confluence includes a confluence valve core, a confluence shuttle valve, a confluence hydraulic control valve and a confluence solenoid valve. The confluence valve core has a first position that allows the first oil inlet and the second oil inlet to merge and a second position that is disconnected. The confluence valve core spring chamber has a movement tendency that drives the confluence valve core toward the first position. The confluence shuttle valve selects the pressure oil at the confluence hydraulic control valve or the confluence solenoid valve to be input into the confluence valve core control chamber and cooperates with the confluence valve core spring chamber to control the position of the confluence valve core. The present invention also has the advantages of simple structure, convenient assembly, reliable operation and long service life.

Description

Technical Field

[0001] The invention relates to a multi-way valve, in particular to an integrated multi-way valve. Background Art

[0002] Multi-way valves can provide reliable system solutions for manufacturers of engineering vehicles. Take cranes as an example. When working, cranes use booms to lift heavy objects, and then rely on turntables to transfer the heavy objects from one position to another to complete the work task. The main actions include main winch, auxiliary winch, luffing and telescopic. These actions are generally integrated in the main valve called multi-way valve. The multi-way valve is the core component of the crane hydraulic control system. It determines the efficiency of the four major actions of main winch, auxiliary winch, luffing and telescopic, as well as the energy consumption level of the whole machine.

[0003] For dual-pump systems, whether it is an electronically controlled pump, a load-sensitive pump, or a fixed-displacement gear pump, how to achieve dual-pump operation or single-pump operation according to actual working conditions has always been a hot topic of discussion. How to achieve confluence is usually achieved through a confluence valve. However, existing confluence valves usually only directly switch through their own electromagnetic control to achieve confluence cutoff, and the control is unreliable. Moreover, another feature of engineering machinery is that the installation space is limited, requiring many functions to be integrated on a valve, such as the pilot function of controlling reversing, the pressure relief function of providing pilot oil, the secondary relief valve function, the pressure cutoff function, etc., which can all be integrated in one body. Summary of the invention

[0004] In order to solve the problem of unreliable confluence switching of the existing multi-way valve in the background technology, the present invention provides an integrated multi-way valve.

[0005] The technical solution of the present invention is: an integrated multi-way valve, including a valve body, wherein the valve body is provided with a first oil inlet, a second oil inlet, a first feedback oil circuit and a second feedback oil circuit, the valve body includes a first working group, a second working group and a merging group, the merging group includes a merging valve core, a merging shuttle valve, a merging hydraulic control valve and a merging solenoid valve, the merging valve core has a first position and a disconnected second position that allow the first oil inlet and the second oil inlet to merge, the merging valve core spring chamber has a movement tendency that drives the merging valve core toward the first position, the merging shuttle valve selects the pressure oil at the merging hydraulic control valve or the merging solenoid valve to be input into the merging valve core control chamber and cooperates with the merging valve core spring chamber to control the position of the merging valve core.

[0006] As an improvement of the present invention, the oil inlet of the converging hydraulic control valve is connected to the first feedback oil circuit, the oil outlet of the converging hydraulic control valve is connected to the converging shuttle valve, and the second feedback oil circuit is connected to the control chamber of the converging hydraulic control valve and cooperates with the spring chamber of the converging hydraulic control valve to control the opening size of the converging hydraulic control valve.

[0007] As a further improvement of the present invention, the oil inlet of the merging solenoid valve is connected to the merging pilot oil, and the oil outlet of the merging solenoid valve is connected to the merging shuttle valve.

[0008] As a further improvement of the present invention, the first working joint group includes at least two working joints and a first control block for controlling the working joints, each working joint is provided with a working valve core, and the first control block controls the actions of the working valve cores of different working joints respectively.

[0009] As a further improvement of the present invention, the first control block includes a control valve body, a control solenoid valve and a control shuttle valve. Every two control solenoid valves form a group and a corresponding control shuttle valve is set. The control shuttle valve selects the pressure oil corresponding to the oil outlet of the control solenoid valve and is used to control the action of the first working group.

[0010] As a further improvement of the present invention, the control solenoid valve is a normally open control solenoid valve and / or a normally closed control solenoid valve and / or an electric proportional solenoid control valve.

[0011] As a further improvement of the present invention, the control shuttle valve comprises a shuttle valve body and a shuttle valve ball, the shuttle valve body is provided with a flow channel and a flow hole, the shuttle valve ball is arranged on the flow channel of the shuttle valve body, and the shuttle valve body is detachably connected to the control valve body.

[0012] As a further improvement of the present invention, the first working group is provided with a first oil return port and a second oil return port, the first working group is integrated with a diverter valve stem, the diverter valve stem is arranged between the first oil return port and the second oil return port, a first screw plug is provided between the diverter valve stem and the first oil return port, and a second screw plug is provided between the diverter valve stem and the second oil return port.

[0013] As a further improvement of the present invention, the first working joint is provided with an oil return check valve, a check valve sleeve and a check valve core, the oil return check valve includes a check valve core sleeve arranged in the check valve sleeve and slidingly cooperated with the check valve sleeve, a check spring is provided between the check valve sleeve and the check valve core, and the check valve sleeve is arranged on the working joint through a retaining spring.

[0014] As a further improvement of the present invention, the first working group is provided with a constant flow valve, a feedback relief valve, a pressure reducing valve and a safety relief valve. The constant flow valve is used to realize the mid-position unloading of the first feedback oil circuit; the feedback relief valve is used to realize the constant pressure function under a certain pressure; the pressure reducing valve and the safety relief valve provide the system with a pilot oil source for driving the working valve core.

[0015] The beneficial effect of the present invention is that, through the arrangement of the confluence hydraulic control valve and the confluence electromagnetic valve, the confluence valve core of the confluence link can realize both the electrically controlled double pump cut-off and the hydraulically controlled double pump cut-off, so that the product confluence and double pump cut-off control are reliable. The present invention also has the advantages of simple structure, convenient assembly, reliable action, long service life, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 It is a structural diagram of embodiment 1 of the present invention.

[0017] Attached Figure 2 This is a schematic diagram of the structure of the second embodiment of the present invention.

[0018] Attached Figure 3 It is a schematic diagram of the structure of the confluence connection 3 in the first and second embodiments of the present invention.

[0019] Attached Figure 4 For attachment Figure 3 Hydraulic schematic diagram of the middle junction 3.

[0020] Attached Figure 5 For attachment Figure 1 Schematic diagram of the structure of the first control block 4.

[0021] Attached Figure 6 For attachment Figure 2 Schematic diagram of the structure of the first control block 4.

[0022] Attached Figure 7 For attachment Figure 5 Schematic diagram of the cross-sectional structure of the control shuttle valve 43.

[0023] Attached Figure 8 For attachment Figure 5 Hydraulic schematic diagram.

[0024] Attached Fig. 9 For attachment Figure 6 Hydraulic schematic diagram.

[0025] Attached Fig.10 It is a structural diagram of the first working group 1 in the first embodiment of the present invention.

[0026] Attached Fig.11 For attachment Fig.10 Schematic diagram of the cross-sectional structure.

[0027] Attached Fig.12 For attachment Fig.10 Schematic diagram of the half-section structure.

[0028] In the figure, 1, first working joint group; 11, working joint; 12, working valve core; 13, diverter valve stem; 131, first screw plug; 132, second screw plug; 14, return oil check valve; 141, check valve sleeve; 142, check valve core; 143, check spring; 144, retaining spring; 15, constant flow valve; 16, feedback relief valve; 17, pressure reducing valve; 18, safety relief valve; 2, second working joint group; 3, confluence joint; 31, confluence valve core; 32, confluence Flow shuttle valve; 33, converging hydraulic control valve; 34, converging solenoid valve; 35, converging pilot oil; 4, first control block; 41, control valve body; 42, control solenoid valve; 43, control shuttle valve; 431, shuttle valve body; 432, shuttle valve ball; 433, flow channel; 434, flow hole; P1, first oil inlet; P2, second oil inlet; LS1, first feedback oil circuit; LS2, second feedback oil circuit; T1 first oil return port; T2, second oil return port. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0030] Depend on Figure 1 Combination Figure 2-12 As shown, an integrated multi-way valve includes a valve body, the valve body is provided with a first oil inlet P1, a second oil inlet P2, a first feedback oil circuit LS1 and a second feedback oil circuit LS2, the valve body includes a first working group 1, a second working group 2 and a confluence 3, the confluence 3 includes a confluence valve core 31, a confluence shuttle valve 32, a confluence hydraulic control valve 33 and a confluence solenoid valve 34, the confluence valve core has a first position for confluence of the first oil inlet and the second oil inlet and a second position for disconnection, the confluence valve core spring chamber has a movement tendency to drive the confluence valve core toward the first position, the confluence shuttle valve selects the pressure oil at the confluence hydraulic control valve or the confluence solenoid valve to be input into the confluence valve core control chamber and cooperates with the confluence valve core spring chamber to control the position of the confluence valve core. The beneficial effect of the present invention is that, through the arrangement of the confluence hydraulic control valve and the confluence solenoid valve, the confluence valve core of the confluence 3 can realize both electrically controlled double pump cut-off and hydraulically controlled double pump cut-off, so that the product confluence and double pump cut-off control are reliable. The invention also has the advantages of simple structure, convenient assembly, reliable action, long service life and the like.

[0031] The oil inlet of the converging hydraulic control valve is connected to the first feedback oil circuit, the oil outlet of the converging hydraulic control valve is connected to the converging shuttle valve, and the second feedback oil circuit is connected to the control chamber of the converging hydraulic control valve and cooperates with the spring chamber of the converging hydraulic control valve to control the opening size of the converging hydraulic control valve. Specifically, the oil inlet of the converging solenoid valve is connected to the converging pilot oil 35, and the oil outlet of the converging solenoid valve is connected to the converging shuttle valve. The converging valve can realize both the electrically controlled double pump cut-off and the hydraulically controlled double pump cut-off, and the hydraulically controlled double pump cut-off requires the first working group 1 and the second working group 2 to work and output the load at the same time to achieve it. The electrically controlled cut-off realized by the converging solenoid valve takes precedence over the hydraulically controlled cut-off, that is, when the first working group 1 or the second working group 2 is not opened, P1 and P2 can achieve reliable converging. The confluence solenoid valve has a priority override function, that is, in terms of priority, no matter what state the confluence hydraulic control valve is in, as long as the confluence solenoid valve is energized, the confluence valve core can be switched. When both the first working group 1 and the second working group 2 are loaded, the confluence valve core can be closed by the confluence hydraulic control valve. When the confluence solenoid valve is opened, the confluence valve core can be closed to realize the electric control priority, and the hydraulic control realizes automatic confluence or disconnection operation with the system action.

[0032] The first working joint group includes at least two working joints 11 and a first control block 4 for controlling the working joints, each working joint is provided with a working valve core 12, and the first control block controls the actions of the working valve cores of different working joints respectively. Specifically, the second working joint group is also provided with a control block, that is, the first control block controls the working valve cores of all working joints on the first working joint group, and the working joints in the first working joint group realize a common control block, thereby reducing the volume of the product.

[0033] The first control block includes a control valve body 41, a control solenoid valve 42 and a control shuttle valve 43. Every two control solenoid valves form a group and a corresponding control shuttle valve is set. The control shuttle valve selects the pressure oil of the corresponding control solenoid valve oil outlet and is used to control the action of the first working joint group. The first control block integrates the normally open / normally closed pilot control function to realize the reversal of the working valve core; at the same time, the control shuttle valve is integrated to lead the pilot oil to realize other functions. Specifically, embodiments 1 and 2 respectively disclose the electric control and hydraulic control to realize the control of the working valve core.

[0034] The control solenoid valve 42 is a normally open control solenoid valve and / or a normally closed control solenoid valve and / or an electric proportional solenoid control valve. Specifically, the control solenoid valve has two forms: a switch solenoid valve and an electric proportional solenoid valve. The switch solenoid valve has two forms: normally open and normally closed. Figure 8 The disclosure includes two types of control solenoid valves: a normally open type and a normally closed type. Whether it is an electric control block or a hydraulic control block, its function is to make the working valve core switch, but the implementation method is different. Figure 8There are two types of control solenoid valves, one in the normally open state and the other in the normally closed state. When the normally open control solenoid valve is used, the pilot control oil source needs to be input into the a* and b* ports, and the shuttle valve is used to lead the pilot oil of a* and b* to control other components. When the normally closed control solenoid valve is used, the two a* / b* can be connected, and the power on / off of the solenoid valve determines which link's main valve core is switched, thus saving a pilot oil source. Fig. 9 It is switched by electric proportion. It only needs to provide a stable pilot oil source and use the pressure reducing function of the electric proportional pressure reducing valve to realize the proportional switching of the working valve core of the working link. More specifically, the desired switching of the working link can be achieved by controlling the on and off of the solenoid valve. It has a simple structure and is convenient and reliable to control.

[0035] The control shuttle valve 43 comprises a shuttle valve body 431 and a shuttle valve ball 432. The shuttle valve body is provided with a flow channel 433 and a flow hole 434. The shuttle valve ball is arranged on the flow channel of the shuttle valve body. The shuttle valve body is detachably connected to the control valve body. The control shuttle valve can be disassembled and assembled, which is convenient for controlling and selecting the oil circuit and for maintenance.

[0036] The first working group is provided with a first oil return port T1 and a second oil return port T2, and the first working group is integrated with a diverter valve stem 13, the diverter valve stem is arranged between the first oil return port and the second oil return port, a first screw plug 131 is arranged between the diverter valve stem and the first oil return port, and a second screw plug 132 is arranged between the diverter valve stem and the second oil return port. The diverter valve stem is arranged in the middle of the two oil return channels, and is isolated from the oil return channels by the first screw plug and the second screw plug, which is conducive to the compression of the overall volume.

[0037] The first working joint is provided with an oil return check valve 14, which includes a check valve sleeve 141 and a check valve core 142. The check valve core is sleeved in the check valve sleeve and slidably cooperates with the check valve sleeve. A check spring 143 is provided between the check valve sleeve and the check valve core. The check valve sleeve is provided on the working joint through a retaining spring 144. Such a structure makes the oil return check valve simple in structure, convenient and reliable in installation, and compact in structure.

[0038] The first working joint is provided with a constant flow valve 15, a feedback relief valve 16, a pressure reducing valve 17 and a safety relief valve 18. The constant flow valve is used to realize the neutral unloading of the first feedback oil circuit; the feedback relief valve is used to realize the constant pressure function under a certain pressure; the pressure reducing valve and the safety relief valve provide the system with a pilot oil source for driving the working valve core. The working joint integrates four functions, namely, the constant flow valve, the feedback relief valve, the pressure reducing valve and the safety relief valve, so that the product has a simple structure, is easy to assemble and has higher safety performance.

[0039] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0041] Technical personnel should note that although the present invention has been described according to the above specific implementation methods, the inventive concept of the present invention is not limited to this invention, and any modification using the inventive concept will be included in the scope of protection of this patent.

Claims

1. An integrated multi-way valve, comprising a valve body, characterized in that The valve body is provided with a first oil inlet (P1), a second oil inlet (P2), a first feedback oil circuit (LS1) and a second feedback oil circuit (LS2); the valve body comprises a first working group (1), a second working group (2) and a merging group (3); the merging group comprises a merging valve core (31), a merging shuttle valve (32), a merging hydraulic control valve (33) and a merging solenoid valve (34); the merging valve core has a first position for merging the first oil inlet and the second oil inlet and a second position for disconnecting; the merging valve core spring chamber has a movement tendency to drive the merging valve core toward the first position; the merging shuttle valve selects a merging hydraulic control valve or a merging solenoid valve. The pressure oil at the solenoid valve is input into the control chamber of the merging valve core and cooperates with the spring chamber of the merging valve core to control the position of the merging valve core; the oil inlet of the merging hydraulic control valve is connected to the first feedback oil circuit, the oil outlet of the merging hydraulic control valve is connected to the merging shuttle valve, the second feedback oil circuit is connected to the control chamber of the merging hydraulic control valve and cooperates with the spring chamber of the merging hydraulic control valve to control the opening size of the merging hydraulic control valve; the first working joint group comprises at least two working joints (11) and a first control block (4) for controlling the working joints, each working joint is provided with a working valve core (12), and the first control block respectively controls the actions of the working valve cores of different working joints.

2. An integrated multi-way valve according to claim 1, characterized in that The oil inlet of the merging solenoid valve is connected to the merging pilot oil (35), and the oil outlet of the merging solenoid valve is connected to the merging shuttle valve.

3. An integrated multi-way valve according to claim 1, characterized in that The first control block comprises a control valve body (41), a control solenoid valve (42) and a control shuttle valve (43), wherein each group of two control solenoid valves is provided with a corresponding control shuttle valve, and the control shuttle valve selects pressure oil from the oil outlet of the corresponding control solenoid valve and is used to control the action of the first working group.

4. An integrated multi-way valve according to claim 3, characterized in that The control solenoid valve (42) is a normally open control solenoid valve and / or a normally closed control solenoid valve and / or an electric proportional solenoid control valve.

5. An integrated multi-way valve according to claim 3, characterized in that The control shuttle valve (43) comprises a shuttle valve body (431) and a shuttle valve ball (432); the shuttle valve body is provided with a flow channel (433) and a flow hole (434); the shuttle valve ball is arranged on the flow channel of the shuttle valve body; and the shuttle valve body is detachably connected to the control valve body.

6. The integrated multi-way valve according to claim 1, characterized in that The first working assembly is provided with a first oil return port (T1) and a second oil return port (T2); the first working assembly is integrated with a diverter valve stem (13); the diverter valve stem is arranged between the first oil return port and the second oil return port; a first screw plug (131) is provided between the diverter valve stem and the first oil return port; and a second screw plug (132) is provided between the diverter valve stem and the second oil return port.

7. An integrated multi-way valve according to claim 6, characterized in that The first working joint is provided with an oil return one-way valve (14), the oil return one-way valve comprising a one-way valve sleeve (141) and a one-way valve core (142), the one-way valve core sleeve being arranged in the one-way valve sleeve and slidingly cooperating with the one-way valve sleeve, a one-way spring (143) being arranged between the one-way valve sleeve and the one-way valve core, and the one-way valve sleeve being arranged on the working joint via a retaining spring (144).

8. The integrated multi-way valve according to claim 1, characterized in that The first working assembly is provided with a constant flow valve (15), a feedback relief valve (16), a pressure reducing valve (17) and a safety relief valve (18); the constant flow valve is used to achieve mid-position unloading of the first feedback oil circuit; the feedback relief valve is used to achieve a constant pressure function under a certain pressure; the pressure reducing valve and the safety relief valve provide a pilot oil source for the system to drive the working valve core.

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