High-flow quick-opening valve group for hydraulic oil cylinder

Abstract

The utility model relates to a high-flow quick-opening valve group for a hydraulic oil cylinder, which is integrated on a valve block, and a valve group and an energy accumulator are arranged in the valve block; the valve block is provided with a pressure oil port, an oil return port and a leakage port, the pressure oil port is further connected with a pressure stabilizing branch, the oil return port is further connected with an oil return branch, and the leakage port is further connected with a leakage branch; the valves comprise a pressure reducing valve, three electromagnetic cone valves, three throttling valves, two balance cone valves and a three-way electromagnetic reversing valve, the three electromagnetic cone valves are respectively a first electromagnetic cone valve, a second electromagnetic cone valve and a third electromagnetic cone valve, the three throttling valves are respectively a first throttling valve, a second throttling valve and a third throttling valve, and the three-way electromagnetic reversing valve is connected with the three-way electromagnetic reversing valve. The two energy accumulators are respectively a first balance cone valve and a second balance cone valve, and the energy accumulators comprise a diaphragm type energy accumulator and a piston type energy accumulator. The large-flow hydraulic quick-opening valve bank can meet the requirement for large driving force, can easily meet the requirement for high torque of a large rotary valve, and is suitable for high-pressure, large-caliber or severe working conditions.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinders, and in particular to a high-flow-rate quick-opening valve assembly for hydraulic cylinders. Background Technology

[0002] With the rapid development of modern industry, the opening of large rotary valve mechanisms in some specialized industries requires high driving force, fast speed, continuous action, and accurate positioning after opening. However, due to the low thrust and slow response speed of traditional solenoid valves (or pneumatic valves), the valve may not be fully opened or may fail to open at all. In actual working conditions, this may cause the actuator to fail to operate normally according to the sequence of actions, delaying production or causing certain losses in operating conditions. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a high-torque, high-speed, and smooth-opening / closing high-flow-rate quick-opening valve assembly for hydraulic cylinders.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a high-flow-rate quick-opening valve group for hydraulic cylinders, wherein the hydraulic cylinder is connected to the high-flow-rate quick-opening valve group through a first oil circuit and a second oil circuit. Its innovation lies in that the high-flow-rate quick-opening valve group is integrated on a valve block, and the valve block is equipped with a valve group and an accumulator.

[0005] The valve block is provided with a pressure port, a return port and a leakage port. A pressure stabilizing branch is also connected to the pressure port, a return oil branch is also connected to the return port, and a leakage branch is also connected to the leakage port.

[0006] The valve group includes a pressure reducing valve, a solenoid cone valve, a throttle valve, a balance cone valve, and a three-way solenoid directional valve. There are three solenoid cone valves: a first solenoid cone valve, a second solenoid cone valve, and a third solenoid cone valve. There are three throttle valves: a first throttle valve, a second throttle valve, and a third throttle valve. There are two balance cone valves: a first balance cone valve and a second balance cone valve. The accumulator includes a diaphragm accumulator and a piston accumulator.

[0007] The return oil branch is sequentially equipped with a second balance cone valve and a third throttle valve, and one side of the return oil branch is connected to the second oil circuit.

[0008] A piston accumulator, a first electromagnetic cone valve, and a pressure reducing valve are sequentially installed on the pressure stabilizing branch, and the oil drain port of the pressure reducing valve is connected to the leakage branch.

[0009] One side of the first oil circuit is connected to the return oil branch. A first throttle valve and a second solenoid cone valve are sequentially installed on the first oil circuit. A second branch is also connected in parallel between the first oil circuit and the return oil branch. A first balance cone valve is installed on the second branch.

[0010] One side of the second oil circuit is connected to a pressure stabilizing branch, and a second throttle valve and a third solenoid cone valve are sequentially installed on the second oil circuit;

[0011] The diaphragm accumulator is connected to a three-way solenoid valve via a third branch. The other port of the three-way solenoid valve is connected to a leakage branch. The remaining port of the three-way solenoid valve is connected to a fourth branch. One side of the fourth branch is connected to the second balance cone valve and the first balance cone valve in sequence, and then connected back to the fourth branch to form a loop. The fourth branch is also connected to the leakage branch via a fifth branch.

[0012] Furthermore, the high-flow-rate quick-opening valve assembly also includes a pressure sensor, which is connected to the pressure stabilizing branch through a detection branch.

[0013] Furthermore, the pressure reducing valve is a cartridge-type pressure reducing valve.

[0014] The advantages of this utility model are as follows: the large-flow hydraulic quick-opening valve assembly can meet the requirements of large driving force and easily cope with the high torque of large rotary valves, and is suitable for high pressure, large diameter or harsh working conditions; at the same time, the valve assembly has high control precision, smooth opening and closing, and can replace pneumatic or solenoid valve drive, reducing the vibration of valves and pipelines during the opening process and extending the service life of equipment; it has the characteristics of high reliability and strong adaptability; the hydraulic system has high efficiency, low energy consumption, and low operating cost, and the hydraulic oil can be recycled, reducing resource waste and environmental pollution.

[0015] The pressure reducing valve in this invention is a cartridge-type pressure reducing valve, which can adjust the system pressure supplied by the oil source. The pressure can be adjusted to the pressure that drives the oil cylinder when the valve is opened and closed. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the high-flow-rate quick-opening valve assembly for hydraulic cylinders according to this utility model. Detailed Implementation

[0017] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0018] like Figure 1 The diagram shows a high-flow-rate quick-opening valve assembly for a hydraulic cylinder. The hydraulic cylinder 1 is connected to the high-flow-rate quick-opening valve assembly through a first oil passage 2 and a second oil passage 3. The high-flow-rate quick-opening valve assembly is integrated on a valve block 25, and the valve block 25 contains the valve assembly and an accumulator.

[0019] The valve block 25 is provided with a pressure oil port 4, a return oil port 5 and a leakage port 6. A pressure stabilizing branch 17 is also connected to the pressure oil port 4, a return oil branch 16 is also connected to the return oil port 5, and a leakage branch 23 is also connected to the leakage port 6.

[0020] The valve assembly includes a pressure reducing valve 15, a solenoid cone valve, a throttle valve, a balance cone valve, a three-way solenoid directional valve 7, a pressure sensor 20, and a check valve 28. In this embodiment, the pressure reducing valve 15 is a cartridge-type pressure reducing valve. The cartridge-type pressure reducing valve can adjust the system pressure supplied by the oil source, and the pressure can be adjusted to the pressure required to open and close the valve and push the hydraulic cylinder.

[0021] There are three electromagnetic cone valves, namely the first electromagnetic cone valve 14, the second electromagnetic cone valve 13 and the third electromagnetic cone valve 10; there are three throttle valves, namely the first throttle valve 12, the second throttle valve 9 and the third throttle valve 18; there are two balance cone valves, namely the first balance cone valve 11 and the second balance cone valve 8; and the accumulators include a diaphragm accumulator 22 and a piston accumulator 21.

[0022] A second balance cone valve 8 and a third throttle valve 18 are sequentially installed on the return oil branch 16. One side of the return oil branch 16 is connected to the second oil passage 3, and the other side of the return oil branch 16 is connected to the return oil port 5. The second balance cone valve 8 and the third throttle valve 18 are sequentially distributed on the return oil branch 16 starting from the side of the return oil branch 16 that is connected to the second oil passage 3.

[0023] A piston accumulator 21, a first electromagnetic cone valve 14, and a pressure reducing valve 15 are sequentially installed on the pressure stabilizing branch 17. The oil drain port of the pressure reducing valve 15 is connected to a first branch 26 and connected in parallel to the leakage branch 23. One side of the pressure stabilizing branch 17 is connected to the pressure oil port 4, and the other side of the pressure stabilizing branch 17 is connected to the piston accumulator 21.

[0024] One side of the first oil circuit 2 is connected to the return oil branch 16. A first throttle valve 12 and a second solenoid cone valve 13 are sequentially installed on the first oil circuit 2. A second branch 27 is also connected in parallel between the first oil circuit 2 and the return oil branch 16. A first balance cone valve 11 is installed on the second branch 27. The connection point between the second branch 27 and the first oil circuit 2 is between the connection point of the first oil circuit 2 and the hydraulic cylinder 1 and the first throttle valve 12. The connection point between the second branch 27 and the return oil branch 16 is between the return oil branch 16 and the return port 5 and the third throttle valve 18.

[0025] One side of the second oil circuit 3 is connected to the voltage stabilizing branch 17, and the connection point between the second oil circuit 3 and the voltage stabilizing branch 17 is located between the piston accumulator 21 and the first electromagnetic cone valve 14. The second oil circuit 3 is sequentially equipped with a second throttle valve 9 and a third electromagnetic cone valve 10.

[0026] The diaphragm accumulator 22 is connected to the three-way solenoid valve 7 via a third branch 29. The other port of the three-way solenoid valve 7 is connected to the leakage branch 6. The remaining port of the three-way solenoid valve 7 is connected to a fourth branch 30. One side of the fourth branch 30 is connected to the second balance cone valve 8 and the first balance cone valve 11 in sequence, and then connected back to the fourth branch 30 to form a loop. The fourth branch 30 is also connected to the leakage branch 23 via a fifth branch 24. The connection point between the fifth branch 24 and the fourth branch 30 is located between the second balance cone valve 8 and the first balance cone valve 11. The connection point between the fifth branch 24 and the leakage branch 23 is located between the connection point between the first branch 26 and the leakage branch 23 and the three-way solenoid valve 7.

[0027] The pressure sensor 20 is connected to the voltage stabilizing branch 17 through a detection branch 19.

[0028] In this embodiment, the first electromagnetic cone valve 14 controls the opening and closing of the main oil supply circuit. When the second balance cone valve 8 is closed, the third electromagnetic cone valve 10 and the second throttle valve 9 can control the slow extension of the rod chamber of the hydraulic cylinder 1, that is, the piston rod of the cylinder is slowly extended. The second throttle valve 9 can adjust the running speed of the piston rod, thereby controlling the opening speed of the valve.

[0029] When the first balance cone valve 11 is closed, the second electromagnetic cone valve 13 and the first throttle valve 12 can control the slow return of oil in the rod chamber of the hydraulic cylinder 1, that is, the piston rod of the cylinder retracts slowly.

[0030] When the second electromagnetic cone valve 13 and the third electromagnetic cone valve 10 are closed, the two-position three-way solenoid valve 7 is energized, providing pilot oil to the first balance cone valve 11 and the second balance cone valve 8. The diaphragm accumulator 22 can ensure the pilot oil pressure required for the balance cone valve to open. At the same time, when the valve needs to be opened quickly, the piston accumulator 21 can release a large flow of oil through the second balance cone valve 8, and the oil quickly enters the rodless chamber of the oil cylinder. Meanwhile, the third throttle valve 18 can adjust the piston rod extension speed of the hydraulic cylinder 1.

[0031] The high-flow quick-opening valve assembly in this invention adopts an integrated hydraulic valve assembly design, which can meet the maximum flow rate of 480L / min. This hydraulic quick-opening valve assembly has obvious advantages in the application of large rotary valves, especially when large driving force, high precision, high reliability and adaptability to harsh environments are required, making it an ideal choice to replace pneumatic or electromagnetic drives.

[0032] This utility model relates to a high-flow-rate quick-opening valve assembly primarily for rotary valves. When the hydraulic cylinder requires additional functions, the valve assembly can be modified accordingly. This valve assembly forms the basic circuit for the quick-opening valve assembly, and other valve assembly circuits are derived and extended from this circuit. For example, a proportional flow valve can be added, and a displacement gauge can be added to the hydraulic cylinder to achieve closed-loop control of the cylinder's operating speed and flow rate, thus enabling precise control of the valve's opening speed.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A high-flow-rate quick-opening valve assembly for a hydraulic cylinder, wherein the hydraulic cylinder is connected to the high-flow-rate quick-opening valve assembly via a first oil circuit and a second oil circuit, characterized in that: A high-flow, quick-opening valve assembly is integrated onto a valve block, which contains the valve assembly and accumulator. The valve block is provided with a pressure port, a return port and a leakage port. A pressure stabilizing branch is also connected to the pressure port, a return oil branch is also connected to the return port, and a leakage branch is also connected to the leakage port. The valve group includes a pressure reducing valve, a solenoid cone valve, a throttle valve, a balance cone valve, and a three-way solenoid directional valve. There are three solenoid cone valves: a first solenoid cone valve, a second solenoid cone valve, and a third solenoid cone valve. There are three throttle valves: a first throttle valve, a second throttle valve, and a third throttle valve. There are two balance cone valves: a first balance cone valve and a second balance cone valve. The accumulator includes a diaphragm accumulator and a piston accumulator. The return oil branch is sequentially equipped with a second balance cone valve and a third throttle valve, and one side of the return oil branch is connected to the second oil circuit. A piston accumulator, a first electromagnetic cone valve, and a pressure reducing valve are sequentially installed on the pressure stabilizing branch, and the oil drain port of the pressure reducing valve is connected to the leakage branch. One side of the first oil circuit is connected to the return oil branch. A first throttle valve and a second solenoid cone valve are sequentially installed on the first oil circuit. A second branch is also connected in parallel between the first oil circuit and the return oil branch. A first balance cone valve is installed on the second branch. One side of the second oil circuit is connected to a pressure stabilizing branch, and a second throttle valve and a third solenoid cone valve are sequentially installed on the second oil circuit; The diaphragm accumulator is connected to a three-way solenoid valve via a third branch. The other port of the three-way solenoid valve is connected to a leakage branch. The remaining port of the three-way solenoid valve is connected to a fourth branch. One side of the fourth branch is connected to the second balance cone valve and the first balance cone valve in sequence, and then connected back to the fourth branch to form a loop. The fourth branch is also connected to the leakage branch via a fifth branch.

2. The high-flow-rate quick-opening valve assembly for hydraulic cylinders according to claim 1, characterized in that: The high-flow-rate quick-opening valve assembly also includes a pressure sensor, which is connected to the pressure stabilizing branch through a detection branch.

3. The high-flow-rate quick-opening valve assembly for hydraulic cylinders according to claim 1, characterized in that: The pressure reducing valve is a cartridge-type pressure reducing valve.

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