Flow pressure control valve for single hydraulic circuit

Abstract

The utility model discloses a kind of flow pressure control valve for single hydraulic circuit, it is related to hydraulic valve technical field, to solve the problem of existing equipment new hydraulic actuator needs to change original structure.The control valve includes valve body, and the valve body is equipped with oil inlet P, load feedback port LS, flow valve, oil return port A, installation fixed hole, loop port T, pressure regulating valve and multiple oil ducts and pressure measuring port;Oil inlet P is connected high-pressure pressure measuring port through high-pressure oil inlet, and flow valve is threaded plug-in valve and is adapted with load feedback oil duct, load feedback port LS connects original equipment main pump LS signal port, and pressure regulating valve is connected load feedback oil duct and oil return port A through process hole, and loop port T is used for overflow, and oil return port A is connected oil outlet pressure measuring port through high-pressure oil outlet.The utility model does not need to change original equipment, can accurately control flow and pressure, small and exquisite, installation is convenient, applicable to equipment function expansion and old equipment upgrading, with higher practicality and economy.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic valve technology, specifically to a flow and pressure control valve suitable for single-circuit hydraulic systems. It can provide a precise supply of hydraulic oil to newly added hydraulic actuators without altering the original hydraulic structure and components of the equipment, thereby enabling the expansion and upgrading of equipment functions. Background Technology

[0002] In industrial production, many mechanical equipment require additional functions during use, which often rely on extra hydraulic actuators. However, the existing hydraulic circuits and components of the equipment have fixed installation methods and positions. To connect new hydraulic actuators to the existing hydraulic circuit, it is usually necessary to change the original equipment structure and replace the original hydraulic components, which is not only time-consuming and costly, but may also affect the stability of the original equipment. The lack of a compact valve assembly in the existing technology that can directly draw oil from any connection point of the original hydraulic circuit and accurately control the flow and pressure leads to significant obstacles to the expansion of equipment functions. This problem is particularly prominent for the technical upgrade of old equipment, and a solution is needed to expand the hydraulic circuit without modifying the original equipment structure. Utility Model Content

[0003] The purpose of this utility model is to solve the problems of high cost and long cycle when adding hydraulic actuators to existing equipment, which requires modifying the original structure. It provides a flow and pressure control valve for a single hydraulic circuit, which can draw oil from any point in the original hydraulic circuit and accurately control the flow and pressure. It is also small in size and easy to install. Without changing the original equipment structure and components, it can add one or more hydraulic circuits to the equipment, reduce the cost of expanding equipment functions and shorten the upgrade cycle.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A flow and pressure control valve for a single hydraulic circuit includes a valve body, and an oil inlet P, a load feedback port LS, a flow valve, a return port A, a circuit port T, and a pressure regulating valve disposed on the valve body. The valve body is equipped with a high-pressure oil inlet channel, a load feedback oil channel, and a high-pressure oil outlet channel. The oil inlet P is connected to the high-pressure test port through the high-pressure oil inlet channel; the oil return port A is connected to the oil outlet test port through the high-pressure oil outlet channel. The flow valve is a threaded cartridge valve, installed in the valve hole on the valve body. Hydraulic oil enters the valve body through the oil inlet P and then flows through the flow valve into the load feedback oil passage. The load feedback port LS is connected to the load feedback oil passage and is used to connect to an external load feedback signal; The pressure regulating valve is installed in a channel on the valve body. This channel is connected to the load feedback oil passage through a transverse process hole and is also connected to the oil return port A. The circuit port T is connected to the valve hole of the pressure regulating valve and is used to connect to an external oil tank; The valve body is provided with mounting holes for fixing the valve body.

[0005] As a further improvement to the above technical solution: Both the high-pressure test port and the oil outlet test port are equipped with pressure test connectors for installing pressure gauges to monitor pressure.

[0006] The load feedback port LS is used to connect to the LS signal port of the original equipment's main pump, so that the control valve circuit and the original equipment circuit can transmit pressure signals in parallel.

[0007] The circuit port T is used to connect to the original equipment oil tank and guide the hydraulic oil overflowing when the pressure regulating valve adjusts the pressure back to the oil tank.

[0008] Compared with the prior art, the beneficial effects of this utility model are: 1. No modification required to the original equipment: This control valve can draw oil from any connection point in the original equipment's hydraulic circuit without changing the structure and components of the original equipment. It can provide hydraulic oil for the newly added hydraulic actuators, greatly reducing the cost and time required for equipment modification. 2. Precise control: The output flow can be precisely adjusted by the flow valve and the output pressure can be precisely adjusted by the pressure regulating valve. It is also equipped with a high pressure test port and an oil outlet pressure test port, which facilitates real-time pressure monitoring and ensures stable operation of hydraulic actuators. 3. Strong compatibility: The load feedback port LS can be connected to the original equipment's main pump LS signal port to realize parallel circuit and synchronous transmission of pressure signals, adapting to different types of existing hydraulic systems. Attached Figure Description

[0009] Figure 1: Front view of this utility model; Figure 2: Main sectional view of the present invention; Figure 3: Left elevation view of this utility model; Figure 4: Right elevation view of this utility model; Figure 5: Hydraulic principle diagram of this utility model.

[0010] In the diagram: 1. Oil inlet P; 2. Load feedback port LS; 3. Flow valve; 4. Oil return port A; 5. Mounting hole; 6. Circuit port T; 7. Pressure regulating valve; 8. High-pressure oil inlet; 9. Load feedback oil inlet; 10. High-pressure oil outlet; 11. High-pressure test port; 12. Oil outlet test port. Detailed Implementation

[0011] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0012] To achieve the above objectives, this utility model provides a flow and pressure control valve for a single hydraulic circuit, comprising a valve body, and an oil inlet P1, a load feedback port LS2, a flow valve 3, a return port A4, a mounting hole 5, a circuit port T6, a pressure regulating valve 7, a high-pressure oil inlet passage 8, a load feedback oil passage 9, a high-pressure oil outlet passage 10, a high-pressure pressure measuring port 11, and an oil outlet pressure measuring port 12, all disposed on the valve body. The specific structure is as follows: Oil passage and pressure test port connection structure: The right side of the oil inlet P1 is connected to the high pressure test port 11 through the high pressure oil inlet passage 8. The high pressure test port 11 can be equipped with a pressure test connector for monitoring the pressure value of the oil inlet P1 during debugging and use; The oil return port A4 is connected to the oil outlet pressure test port 12 through the high pressure oil outlet passage 10. The oil outlet pressure test port 12 can be equipped with a pressure test connector for monitoring the pressure value of the oil return port A4 during debugging and use. Flow control structure: The flow valve 3 is a threaded cartridge valve with a valve hole on the valve body that matches the flow valve 3. The flow valve 3 is fully installed in the valve hole. After the hydraulic oil enters the valve body through the inlet P1, it flows through the flow valve 3 and enters the load feedback oil passage 9. The flow rate of the hydraulic oil in the load feedback oil passage 9 can be changed by adjusting the valve core of the flow valve 3. The load feedback port LS2 is located on the outside of the valve body and is connected to the load feedback oil passage 9. The load feedback port LS2 can be connected to the LS signal port of the original equipment main pump, so that this control valve circuit and the original equipment circuit are connected in parallel and jointly transmit pressure signals to the main pump. Pressure regulation and overflow structure: The valve body is provided with a channel for installing the pressure regulating valve 7. This channel is connected to the load feedback oil passage 9 through a transverse process hole, and is directly connected to the return oil port A4. High-pressure oil enters the channel where the pressure regulating valve 7 is located through the load feedback oil passage 9 and the transverse process hole. After being pressure-regulated by the pressure regulating valve 7, it flows to the return oil port A4. The circuit port T6 is located on the outside of the valve body and is connected to the left end of the valve hole of the pressure regulating valve 7. It is used to overflow excess hydraulic oil back to the oil tank when the pressure regulating valve 7 is adjusting the pressure. Installation structure: The mounting and fixing hole 5 is provided on the valve body, which is used to fix the valve body in the designated position of the equipment to ensure the stable operation of the control valve. Installation process: Secure the control valve to the appropriate position on the original equipment using bolts through the mounting holes 5 on the valve body; connect any hydraulic pipe in the original equipment's hydraulic circuit to the oil inlet P1 to obtain oil; connect the load feedback port LS2 to the LS signal port of the original equipment's main pump through a pipeline; connect the return port A4 to the oil inlet of the newly added hydraulic actuator; connect the circuit port T6 to the original equipment's oil tank through a pipeline. Commissioning process: Install pressure testing connectors and pressure gauges at the high-pressure test port 11 and the oil outlet test port 12 respectively; start the original equipment hydraulic system, and the hydraulic oil enters the valve body through the oil inlet P1 and flows to the flow valve 3 through the high-pressure oil inlet channel 8; adjust the valve core of the flow valve 3 and observe the equipment operation status until the action speed of the newly added hydraulic actuator reaches the design requirements. At this time, the flow in the load feedback oil channel 9 is stable; then adjust the pressure regulating valve 7 and monitor the pressure at the return oil port A4 through the pressure gauge at the oil outlet test port 12 until the pressure value meets the working requirements of the newly added hydraulic actuator; during the commissioning process, the excess hydraulic oil overflowing from the pressure regulating valve 7 flows back to the oil tank through the return port T6. Working process: During normal operation, hydraulic oil enters the pressure regulating valve 7 through the inlet P1, flow valve 3, load feedback oil passage 9, and transverse process hole. After being regulated by the pressure regulating valve 7, it is output from the return oil port A4 to the newly added hydraulic actuator to drive its operation. The pressure signal in the load feedback oil passage 9 is transmitted to the original main pump through the load feedback port LS2, working in conjunction with the original circuit pressure signal to ensure stable output of the main pump. The high pressure test port 11 and the oil outlet test port 12 can monitor the pressure at key locations in real time, facilitating equipment maintenance.

[0013] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A flow and pressure control valve for a single hydraulic circuit, comprising a valve body, and an inlet port P (1), a load feedback port LS (2), a flow valve (3), a return port A (4), a circuit port T (6), and a pressure regulating valve (7) disposed on the valve body; characterized in that: The valve body is provided with a high-pressure oil inlet (8), a load feedback oil inlet (9), and a high-pressure oil outlet (10). The oil inlet P (1) is connected to the high pressure test port (11) through the high pressure oil inlet channel (8); the oil return port A (4) is connected to the oil outlet test port (12) through the high pressure oil outlet channel (10); The flow valve (3) is a threaded cartridge valve, installed in the valve hole on the valve body. Hydraulic oil enters the valve body through the oil inlet P (1) and then flows through the flow valve (3) into the load feedback oil passage (9). The load feedback port LS (2) is connected to the load feedback oil passage (9) and is used to connect to the external load feedback signal; The pressure regulating valve (7) is installed in the channel on the valve body. The channel is connected to the load feedback oil passage (9) through the transverse process hole and is connected to the return oil port A (4). The circuit port T (6) is connected to the valve hole of the pressure regulating valve (7) and is used to connect to an external oil tank; The valve body is provided with mounting holes (5) for fixing the valve body.

2. The flow and pressure control valve for a single hydraulic circuit according to claim 1, characterized in that, Both the high-pressure test port (11) and the oil outlet test port (12) are equipped with pressure test connectors for installing pressure gauges to monitor pressure.

3. The flow and pressure control valve for a single hydraulic circuit according to claim 1, characterized in that, The load feedback port LS (2) is used to connect to the LS signal port of the original equipment main pump, so that the control valve circuit and the original equipment circuit can transmit pressure signals in parallel.

4. The flow and pressure control valve for a single hydraulic circuit according to claim 1, characterized in that, The circuit port T (6) is used to connect to the original equipment oil tank and guide the hydraulic oil overflowing when the pressure regulating valve (7) adjusts the pressure back to the oil tank.

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