Control valve for variable pump load feedback

Abstract

The utility model discloses a control valve for load feedback of a variable pump, which belongs to the technical field of control valves, and comprises a valve body, an electromagnetic valve I and an electromagnetic valve II are respectively mounted above the valve body from left to right, a hydraulic control valve is arranged on one side of the electromagnetic valve II, and the hydraulic control valve is arranged on the other side of the electromagnetic valve II. An L opening and a shuttle valve are installed on one side of the valve body from top to bottom, and a damper is arranged at the upper left corner of the shuttle valve. By arranging a control valve composed of a hydraulic control valve, a first electromagnetic valve, a second electromagnetic valve and a shuttle valve, high-pressure signals are obtained from different oil ways and fed back to a variable pump according to whether power-on / power-off oil ways of the electromagnetic valves are the same or not and the characteristic that the shuttle valve adopts high pressure, and then the displacement of the pump is controlled, so that the purpose of accurate control is achieved; according to the variable pump load feedback control valve set, the efficiency of a hydraulic system is improved, the requirements for heating and installation space are reduced, and meanwhile the weight of the whole machine is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to control valve technical field more specifically, relate to a control valve for variable displacement pump load feedback. BACKGROUND

[0002] With the maturation of load feedback technology, industry standard gradually forms, saves the cost, reduces the product size, conforms to the need of product upgrading, and load feedback system has developed from single fluid hydraulic control to more accurate control mode, through the combination of sensor and controller, can make the feedback of load feedback system accurate, responds quickly, improves the quality of product, in practical application, the load feedback technology of variable displacement pump controls the tilt angle of swash plate through the feedback of pump outlet oil pressure and the feedback of oil pressure of oil tank that flows back through pressure control valve, and then controls output flow to reach the actual use purpose, avoids unnecessary overflow loss.

[0003] Based on the above, the inventor finds that: at present, the existing control valve structure is relatively simple, mostly adopts single oil circuit to control the displacement of variable displacement pump, cannot reach the purpose of accurate control, therefore, in view of this, the prior art is researched and improved, a control valve for variable displacement pump load feedback is provided, to reach the purpose of more practical value. SUMMARY

[0004] 1. Technical problem to be solved

[0005] In view of the problems in the prior art, the utility model aims at providing a control valve for variable displacement pump load feedback, which can prevent the loosening of the connecting pieces between the mosquito net framework rods after long-term use, and the collapse of the mosquito net framework.

[0006] 2. Technical scheme

[0007] To solve the above problems, the utility model adopts the following technical scheme.

[0008] A control valve for variable displacement pump load feedback, comprising a valve body, an electromagnetic valve one and an electromagnetic valve two are installed above the valve body from left to right, a liquid control valve is arranged on one side of the electromagnetic valve two, an L port and a shuttle valve are installed on one side of the valve body from top to bottom, a damper is arranged at the upper left corner position of the shuttle valve, a fixed seat is fixedly connected to the bottom of the valve body, a concave seat is installed below the fixed seat, a fastening button is threadedly connected to one side of the concave seat, a clamping groove is formed in the inner side wall of the fixed seat, a clamping block is clamped in the inner side of the clamping groove, and a mounting rod is threadedly connected to the connection between the clamping block and the fixed seat.

[0009] Further, the valve body is provided with the interface A and the interface B from left to right on the side far away from the L port, the valve body is provided with the interface P and the interface P from top to bottom on the right side, the interface C is arranged at the upper left corner of the interface P, the electromagnetic valve is provided with two groups, and the shuttle valve is provided with three groups.

[0010] Further, the interface A to the interface C pressure output, the electromagnetic valve one is powered on, the signal is transmitted to the interface C through the shuttle valve, the interface B and the interface C pressure output, the interface B provides pressure oil, and the signal of the interface C is transmitted to the interface C through the shuttle valve, the interface B and the interface P pressure output, the electromagnetic valve one is powered on, and the signal is transmitted to the interface P through the shuttle valve.

[0011] Further, the L port provides external control oil, the electromagnetic valve one is not powered on, the signal of the interface B is transmitted to the interface P through the shuttle valve, and when the electromagnetic valve two is powered on, the pressure of the interface B is transmitted to the interface P.

[0012] Further, the fastening knob is provided with two, and is symmetrically arranged on the two sides of the recess.

[0013] Further, the clamping groove is connected in a clamping and embedding mode with the clamping block.

[0014] Further, the mounting rod is provided with two, and each mounting rod is connected in a threaded mode with the clamping block through the fixing seat.

[0015] 3. Beneficial effects

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] (1) the control valve is composed of the hydraulic control valve, the electromagnetic valve one, the electromagnetic valve two and the shuttle valve, the high-pressure signal is fed back to the variable pump from different oil paths by using the same or not of the electromagnetic valve power-on / power-off oil path and the characteristics of the shuttle valve adopting high pressure, so that the displacement of the pump is controlled, the purpose of accurate control is achieved, the control valve group of the variable pump load feedback not only improves the efficiency of the hydraulic system, but also reduces the heat and the installation space requirement, and the weight of the whole machine is also reduced.

[0018] (2) the fixing seat is fixedly connected to the bottom of the valve body, the clamping block is connected in a clamping and embedding mode with the clamping groove, the mounting rod is connected in a threaded mode with the clamping block through the fixing seat, the fastening knob is symmetrically arranged on the two sides of the recess, the control valve can be quickly disassembled and assembled, and operation is facilitated. ACCURACY

[0019] Figure 1 It is a three-dimensional schematic view of the utility model;

[0020] Figure 2 It is a planar schematic view of the utility model;

[0021] Figure 3 It is the schematic view of the handrail of the utility model;

[0022] Figure 4 It is the schematic view of the utility model from the side;

[0023] Figure 5 It is the schematic view of the A part of the utility model.

[0024] Mark explanation in the drawing:

[0025] 1, valve body;2, electromagnetic valve one;3, electromagnetic valve two;4, hydraulic control valve;5, shuttle valve;6, damping;7, fixed seat;8, concave seat;9, fastening knob;10, clamping groove;11, clamping block;12, mounting rod;13, L port. Specific implementation

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model;Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments;Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0027] Embodiment:

[0028] Please refer to Figures 1-5 , a control valve for variable pump load feedback, comprising a valve body 1, electromagnetic valve one 2 and electromagnetic valve two 3 are installed from left to right above the valve body 1, the hydraulic control valve 4 is arranged on one side of the electromagnetic valve two 3, the L port 13 and the shuttle valve 5 are installed from top to bottom on one side of the valve body 1, the shuttle valve 5 is used for signal transmission, the damping 6 is arranged at the upper left corner position of the shuttle valve 5, the fixed seat 7 is fixedly connected at the bottom of the valve body 1, the concave seat 8 is installed below the fixed seat 7, the fixed seat 7 and the concave seat 8 are used for installing the control valve concave seat 8, the fastening knob 9 is threadedly connected on one side of the concave seat 8, the fastening knob 9 is used for limiting the concave seat 8, the clamping groove 10 is formed in the inner side wall of the fixed seat 7, the clamping block 11 is clamped in the inner side of the clamping groove 10, the clamping groove 10 and the clamping block 11 are used for limiting the concave seat 8, the mounting rod 12 is threadedly connected at the connecting position of the clamping block 11 and the fixed seat 7.

[0029] Please refer to Figure 1 And Figure 4 , the interface A and the interface B are installed from left to right on the side of the valve body 1 away from the L port 13, the interface P1 and the interface P2 are installed from top to bottom on the right side of the valve body 1, the interface C is arranged at the upper left corner position of the interface P1, the electromagnetic valve one 2 is provided with two groups, the shuttle valve 5 is provided with three groups, the electromagnetic valve one 2 and the electromagnetic valve two 3 can cooperate with the shuttle valve 5 to transmit signals by being arranged.

[0030] Please refer toFigure 1 and Figure 4 , interface A to interface C pressure output, solenoid valve 2 is powered, through the shuttle valve 5 signal transmission to interface C, interface B and interface C pressure output, interface B provides pressure oil, interface C through the shuttle valve 5 signal transmission to interface C, interface B and interface P1 pressure output, solenoid valve 2 is powered, through the shuttle valve 5 signal transmission to interface P1, by setting interface A, interface B, interface C, interface P1 and interface P2 can be obtained from different oil circuit high pressure signal to feedback to the variable pump.

[0031] Referring to Figure 1 and Figure 4 , L port 13 provides external control oil, solenoid valve 2 is not obtained, interface B signal through the shuttle valve 5 to interface P1, when solenoid valve 2 3 is obtained, interface B pressure will be transmitted to interface P2, by setting the shuttle valve 5 can transmit signal.

[0032] Referring to Figure 2 and Figure 5 , the fastening button 9 is provided with two, symmetrically arranged on both sides of the recess 8, by setting the fastening button 9 can install the control valve.

[0033] Referring to Figure 2 and Figure 5 , the clamping groove 10 and the clamping block 11 are connected, by setting the clamping groove 10 and the clamping block 11 can limit the recess 8.

[0034] Referring to Figure 2 and Figure 5 , the mounting rod 12 is provided with two, each mounting rod 12 is screwed with the clamping block 11 through the fixed seat 7, by setting the mounting rod 12 can install the recess 8.

[0035] In use: valve body 1 operation, interface A to interface C pressure output, solenoid valve 2 is powered, through the shuttle valve 5 signal transmission to interface C, interface B and interface C pressure output, interface B provides pressure oil, interface C through the shuttle valve 5 signal transmission to interface C, interface B and interface P1 pressure output, solenoid valve 2 is powered, through the shuttle valve 5 signal transmission to interface P1; L port 13 provides external control oil, solenoid valve 2 is not obtained, interface B signal through the shuttle valve 5 to interface P1, when solenoid valve 2 3 is obtained, interface B pressure will be transmitted to interface P2, interface B pressure will be transmitted to P2 port, using the clamping block 11 and the clamping groove 10 clamping connection, and then using the mounting rod 12 is screwed with the clamping block 11 through the fixed seat 7, the fastening button 9 is symmetrically arranged on both sides of the recess 8, which can quickly disassemble and assemble the control valve, and is convenient to operate; the control valve group of the variable pump load feedback not only improves the efficiency of the hydraulic system, but also reduces the heat and the demand for installation space, and also reduces the weight of the whole machine.

[0036] Finally should be explained is: in the description of the utility model, it is to be explained that, the term "vertical", "upper", "lower", "horizontal" and so on indicate the position relation or location relation is based on the position relation or location relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and is not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation structure and operation, therefore can not be understood as the limitation of the utility model.

[0037] In the description of the utility model, it is to be explained that, unless otherwise explicitly provided and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, can be fixedly connected, can also be detachably connected, or integrally connected, can be mechanically connected, can also be electrically connected, can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] The above is only the preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this. Any skilled in the art can understand the specific meaning of the above terms in the utility model according to the technical range disclosed by the utility model and the improvement concept of the utility model, and the equivalent replacement or change of the technical scheme of the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A control valve for variable pump load feedback, comprising a valve body (1), an electromagnetic valve one (2) and an electromagnetic valve two (3) are installed above the valve body (1) from left to right, respectively, a hydraulic control valve (4) is arranged on one side of the electromagnetic valve two (3), characterized in that: One side of the valve body (1) is provided with L port (13) and shuttle valve (5) from top to bottom, the upper left corner of the shuttle valve (5) is provided with damping (6), the bottom of the valve body (1) is fixedly connected with fixed seat (7), the lower side of the fixed seat (7) is provided with concave seat (8), one side of the concave seat (8) is threadedly connected with fastening knob (9), the inner side wall of the fixed seat (7) is provided with clamping groove (10), the inner side of the clamping groove (10) is clamped with clamping block (11), the connecting part of the clamping block (11) and the fixed seat (7) is threadedly connected with mounting rod (12).

2. A control valve for variable pump load feedback according to claim 1, characterized in that: The side of the valve body (1) away from the L port (13) is provided with interface A and interface B from left to right, the right side of the valve body (1) is provided with interface P1 and interface P2 from top to bottom, the upper left corner of the interface P1 is provided with interface C, the electromagnetic valve (2) is provided with two groups, the shuttle valve (5) is provided with three groups.

3. A control valve for variable pump load feedback as set forth in claim 2, characterized by: The interface A to interface C pressure output, the electromagnetic valve (2) is powered on, the signal is transmitted to the interface C through the shuttle valve (5), the interface B and the interface C pressure output, the interface B provides pressure oil, the interface C transmits the signal to the interface C through the shuttle valve (5), the interface B and the interface P1 pressure output, the electromagnetic valve (2) is powered on, the signal is transmitted to the interface P1 through the shuttle valve (5).

4. A control valve for variable pump load feedback as set forth in claim 2, characterized by: The L port (13) provides external control oil, the electromagnetic valve (2) is not powered on, the signal of the interface B is transmitted to the interface P1 through the shuttle valve (5), when the electromagnetic valve (3) is powered on, the pressure of the interface B is transmitted to the interface P2.

5. A control valve for variable pump load feedback as defined in claim 1, wherein: The fastening knob (9) is provided with two, which are symmetrically arranged on both sides of the concave seat (8).

6. A control valve for variable pump load feedback as defined in claim 1, wherein: The clamping groove (10) is connected with the clamping block (11).

7. A control valve for variable pump load feedback as defined in claim 1, wherein: The mounting rod (12) is provided with two, each mounting rod (12) is threadedly connected with the clamping block (11) penetrating through the fixed seat (7).

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