High-flow two-way cartridge valve type high-pressure stop valve

Abstract

The utility model relates to a large-flow two-way cartridge valve type high-pressure stop valve which comprises a valve seat, a valve element, a shuttle valve, a spring, a valve rod, a throttling screw plug, a cover plate body, a limiting steel wire, a ball, a threaded seat, an adjusting screw rod, a nut and a hand wheel. Wherein the valve seat and the valve core are combined into an insert, and the valve rod, the throttling screw plug, the cover plate body, the limiting steel wire, the ball, the threaded seat, the adjusting screw rod, the nut and the hand wheel are mounted in the cover plate body to form a cover plate; during assembly, the plug-in is arranged in the oil path block, the cover plate body is fixed on the oil path block through a fastener, and the shuttle valve is arranged in the oil path block or integrated in the cover plate according to specific design requirements. The utility model has the characteristics that the hydraulic elements are simple and convenient to arrange, the hydraulic elements are few, the volume of the manifold block is small, the space required by operation is small, the operation torque is small, the cost is low, and the like. Only one valve needs to be installed in an oil path block, connection and disconnection of an oil path can be achieved, and especially manual operation convenience under the current high-pressure and large-flow working conditions is achieved.

Description

Technical Field

[0001] The utility model relates to a large-flow two-way cartridge valve type high-pressure stop valve, which is particularly suitable for a hydraulic oil circuit with large flow and high pressure opening and closing. Background Art

[0002] Existing 31.5MPa-class high-pressure ball valves are only available in sizes of DN65, 31.5MPa-class globe valves are only available in sizes of DN32, and 21MPa-class globe valves are only available in sizes of DN80. These valves all share common flaws: 1. The opening and closing handles are extremely long, reaching 250mm, and the handwheel diameter is large, reaching 280mm. 2. The torque required to open and close the valve under pressure is so high that a one-meter-long external force rod is required to open and close the valve. This requires a significant amount of space for operation, severely limiting its use in compact equipment such as ships and construction machinery. Furthermore, the existing ball and globe valves are insufficient for hydraulic systems with higher flow rates.

[0003] There are three common approaches to this high-flow hydraulic system: 1. Using a two-way cartridge valve with manual control can address the high-flow problem. However, the valve's regulating stem travel is too long, resulting in slow opening and closing. Furthermore, the regulating torque under high-pressure conditions is so high that a force lever is required for adjustment, making it inconvenient for frequent use. 2. Abandoning manual control in favor of electronic control, using a two-way cartridge valve with a top-mounted directional valve for on-off control, only works with live operation, leaving the solenoid valve coil energized for extended periods, which can easily burn out. Furthermore, this approach cannot meet the emergency control requirements under special conditions. 3. Using multiple small-diameter ball valves in parallel increases the number of components required in the system, making operation more complex and reducing system reliability. Furthermore, the increased number of components increases the required installation and operating space, complicating the layout.

[0004] To address these shortcomings, it is crucial to develop a patented high-flow, two-way cartridge valve-type, high-pressure globe valve, leveraging the installation dimensions and structure of existing, mature, high-flow, two-way cartridge valves. The key technology employed is the use of high-pressure oil sources A and B, which flow through the shuttle valve. The higher pressure oil is controlled by the valve stem, reaching the valve core control chamber, or the pressure oil in the control chamber is released through the valve core to the Y port, thereby opening and closing the valve core. This allows for very low torque adjustment of the small valve stem, which is sufficient for adjustment with an 80mm diameter handwheel, minimizing the required operating space. The small valve stem that simultaneously opens and closes this globe valve can be used on two-way cartridge valves with a 40MPa rating from DN63 to DN160. The operating torque does not increase with increasing diameter, resulting in exceptional versatility. Furthermore, this valve structure facilitates integration into hydraulic valve manifolds, simplifying layout and operation. Summary of the Invention

[0005] The utility model aims to provide a large-flow two-way cartridge valve type high-pressure stop valve, which has simple hydraulic component selection, convenient layout, few hydraulic components, small oil circuit block volume, small space required for operation, small operating torque and low cost; only one valve needs to be installed in the oil circuit block to realize the on-off of the oil circuit, solving the problem of manual operation convenience under high-pressure working conditions.

[0006] To achieve the above-mentioned purpose, the technical solution of the utility model is: a large-flow two-way cartridge valve type high-pressure stop valve, including a valve seat, a valve core, a shuttle valve, a spring, a valve stem, a throttling screw plug, a cover plate body, a limit wire, a ball, a threaded seat, an adjusting screw, a nut, and a handwheel, wherein the valve seat and the valve core are combined into a plug-in, the valve stem, the throttling screw plug, the cover plate body, the limit wire, the ball, the threaded seat, the adjusting screw, the nut, and the handwheel are installed in the cover plate body to form a cover plate, the plug-in is installed in the oil circuit block, the shuttle valve is installed in the oil circuit block or integrated in the cover plate body, and the cover plate body is fixed to the oil circuit block by fasteners.

[0007] Furthermore, a large-flow two-way cartridge valve type high-pressure stop valve is used, which can achieve flow and closure from port A to port B or from port B to port A regardless of the circular areas of the valve core diameters D1 and D2 and the ratio between the circular areas of D1 and D2.

[0008] Furthermore, the installation dimensions of the plug-in unit and the cover body comply with DIN24342, ISO7368, and GB2877.

[0009] Furthermore, when the oil circuit has a back pressure requirement, a spring with corresponding stiffness is selected according to the required back pressure.

[0010] Furthermore, the valve seat and the bottom of the valve core on the main oil line are sealed with conical surface grinding, and the side is sealed with an O-ring or Gly ring; the ball on the control oil line is in line contact with the valve stem to achieve sealing. When the valve core is closed, there is zero leakage between port A and port B.

[0011] Furthermore, when the adjusting screw is screwed to the closed position, the valve core is at the lowest point. At this time, the pressure oil of ports A and B passes through the shuttle valve, and the higher pressure oil reaches the upper cavity of the valve core through the flow channel in the valve stem. Because the area of ​​the upper cavity of the valve core is larger than the bottom area of ​​the valve core and the annular area of ​​the valve core, according to the force balance, the valve core is always kept in a closed state, and ports A and B are blocked; at this time, when the handwheel is adjusted to lift the adjusting screw to the open position, the pressure oil reaching the upper cavity of the valve core through the shuttle valve is drained through the top ball of the flow channel in the valve stem, and at the same time, the pressure oil of ports A and B is cut off through the cylindrical surface of the valve stem, and the higher pressure oil flows out through the shuttle valve. The oil in the upper cavity of the valve core reaches port Y without damping. At this time, when the pressure of any one of ports A and B reaches the pressure value set by the spring, the valve core overcomes the spring force and lifts upward under the action of the liquid pressure, and the valve core is in an open state, and ports A and B are interconnected.

[0012] Furthermore, channel a is led from port A, and channel b is led from port B. After comparison by the shuttle valve, the larger value reaches the upper chamber of the valve core after passing through channels x, d, and c, and acts on the top of the valve core, the bottom of the valve stem, and the bottom of the ball. When the area of ​​the valve core diameter D1 is S1, the area of ​​D2 is S2, and the area of ​​the circular rings of D1 and D2 is S3, the pressure in the upper chamber of the valve core is F=P(maxA / B)×S1, and the pressure in the lower chamber of the valve core is F=P(A)×S2+P(B)×S3.

[0013] The beneficial effects of the utility model are:

[0014] The utility model adopts the advantages of simple selection and convenient arrangement of hydraulic components, fewer hydraulic components, small oil circuit block size, small space required for operation, small operating torque and low cost; only one valve needs to be installed in the oil circuit block to realize the on-off of the oil circuit, and also solves the convenience of manual operation under high-pressure working conditions.

[0015] The large-flow two-way cartridge valve type high-pressure stop valve of the utility model has the advantages of short operating stroke (quick opening and closing), large flow rate (up to several thousand liters per minute), small operating torque, small operating space, small installation space, few faults, small oil circuit block volume and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the large flow two-way cartridge valve type high-pressure stop valve of the utility model being integrated into the hydraulic valve block;

[0017] Figure 2 This is a schematic diagram of the large flow two-way cartridge valve type high pressure stop valve of the utility model being integrated on the cover plate body;

[0018] Figure 3 This is the working principle diagram of the large flow two-way cartridge valve type high pressure stop valve of the utility model;

[0019] Figure 4 This is a schematic diagram of the working process of the large flow two-way cartridge valve type high pressure stop valve of the utility model;

[0020] Figure 5 This is a schematic diagram of the plug-in structure;

[0021] Figure 6 It is a schematic diagram of the cover;

[0022] Figure 7 It is a schematic diagram of the jack;

[0023] Wherein (a) is the main cross-sectional view, (b) is the top view;

[0024] In the figure: oil circuit block 1, valve seat 2, valve core 3, shuttle valve 4, spring 5, valve stem 6, throttle screw plug 7, cover plate body 8, limit wire 9, ball 10, threaded seat 11, adjusting screw 12, nut 13, handwheel 14. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] like Figures 1 to 3 As shown, the embodiment of the present invention provides a large flow two-way cartridge valve type high pressure stop valve, including two structures: Figure 1 The structure shown in FIG4 is integrated into the hydraulic valve block. Figure 2 In the structure shown, the shuttle valve 4 is integrated on the cover plate body 8. Two structures can be selected according to the actual layout convenience.

[0027] This large flow two-way cartridge valve type high-pressure stop valve utilizes the existing two-way cartridge valve installation dimensions, which comply with DIN24342, ISO7368, and GB2877 to achieve on-off switching between ports A and B.

[0028] like Figure 1 As shown, the present invention presents a high-flow, two-way, cartridge-type, high-pressure globe valve, comprising a valve seat 2, valve core 3, shuttle valve 4, spring 5, valve stem 6, throttle screw 7, cover plate 8, stop wire 9, ball 10, threaded seat 11, adjusting screw 12, nut 13, and handwheel 14. Leveraging the proven structure of a two-way cartridge valve, the valve seat 2 and valve core 3 form the insert; the valve stem 6, throttle screw 7, cover plate 8, stop wire 9, ball 10, threaded seat 11, adjusting screw 12, nut 13, and handwheel 14 form the cover plate 8. The insert and shuttle valve 4 are installed in the oil passage block 1; the cover plate 8 is secured to the oil passage block 1 via hexagon socket head cap screws 15. The installation dimensions of the insert and cover plate 8 are the same as those of existing two-way cartridge valves and comply with DIN 24342, ISO 7368, and GB 2877.

[0029] During installation, Figure 5 The plug-in shown is inserted Figure 7 In the jack shown, Figure 6 Reinstall the cover shown Figure 7 Then tighten the four hexagon socket screws into the holes shown in the figure.

[0030] Regardless of the ratio of the circular area of ​​the valve core diameter D1, D2 and the circular area of ​​D1 and D2, the flow from port A to port B or from port B to port A and the closing can be achieved. Figure 1 、 3 shown.

[0031] Spring 5 is an optional part. When the oil circuit has a back pressure requirement, a spring with corresponding stiffness can be selected according to the required back pressure. Spring 5 can also be chosen not to be installed to reduce the opening pressure.

[0032] The valve seat 2 and the bottom of the valve core 3 in the main oil circuit are sealed with a conical surface grinding, and the side is sealed with an O-ring or a grid ring; the ball 10 of the control oil circuit is in line contact with the valve stem 6 to achieve sealing. When the valve core 3 is closed, there is zero leakage between A and B. Figure 1 shown.

[0033] When the adjusting screw 12 is screwed to the closed position, the valve core 3 is at the lowest point. At this time, the pressure oil of ports A and B passes through the shuttle valve, and the higher pressure oil reaches the upper cavity of the valve core through the flow channel in the valve stem. Because the area of ​​the upper cavity of the valve core is larger than the bottom area of ​​the valve core and the annular area of ​​the valve core, according to the force balance, the valve core 3 remains in the closed state, and A and B are blocked; at this time, when the adjusting screw 12 is raised to the open position by adjusting the handwheel 14, the pressure oil reaching the upper cavity of the valve core through the shuttle valve 4 is drained through the top ball of the flow channel in the valve stem, and at the same time, the pressure oil of ports A and B is cut off by the cylindrical surface of the valve stem, and the higher pressure oil flows out through the shuttle valve. The oil in the upper cavity of the valve core reaches the Y port without damping. At this time, when the pressure of any one of ports A and B reaches the spring set pressure value, the valve core overcomes the spring force and lifts upward under the action of the liquid pressure, and the valve core is in the open state, and ports A and B are interconnected.

[0034] like Figure 3 As shown, the control oil from port A is drawn through channel a and from port B through channel b. After comparison by shuttle valve 4, the larger value reaches the upper chamber of valve core 3 through channels x, d, and c, acting on the top of valve core 3, the bottom of valve stem 6, and the bottom of ball 10. Assuming the area of ​​valve core diameter D1 is S1, the area of ​​D2 is S2, and the area of ​​the rings around D1 and D2 is S3, the pressure in the upper chamber of the valve core is F = P(maxA / B) × S1, and the pressure in the lower chamber of the valve core is F = P(A) × S2 + P(B) × S3. Because shuttle valve 4 compares the control oil from channels A and B, the larger value reaches the upper chamber of valve core 3 and the bottom of ball 10 through channel X. Compared to conventional high-pressure globe valves, the most significant feature of adjusting handwheel 14 is that the force it must overcome is only the pressure acting on the bottom area of ​​valve stem 6, not the pressure acting on valve core 3. This reduces the required operating torque, achieving convenient operation under high-pressure and large-diameter conditions. It also reduces the size of the operating handle, minimizing the required operating space and resulting in a compact structure.

[0035] When the valve core 3 needs to be opened in the closed state, it is necessary to turn the adjusting hand wheel 14 to lift the adjusting screw 12. During this process, the pilot pressure oil will pass through the upper chamber of the valve core 3. The pressures P(A) and P(B) cannot be completely consistent, and one of them will be smaller. At this time, the upper chamber pressure is always greater than the lower chamber pressure, and the pilot pressure will lift the ball 10 and the valve stem 6, so that the pilot oil drain channel cannot be opened, that is, the valve core 3 remains in the closed state during the movement stroke of the valve stem 6; when the valve stem 6 moves to the limit wire 9, the pilot oil channel is cut off, and the valve stem 6 is no longer lifted , the ball 10 continues to rise under the action of the pilot pressure oil at the bottom, and the pressure oil in the upper chamber of the valve core 3 overflows from the ball 10 through the gap of the e channel and the Y channel. At this time, the valve core 3 can be pushed by any pressure of AB, and AB is interconnected; when the valve core 3 needs to be closed in the open state, first turn the adjusting handwheel 14 to make the adjusting screw 12 and the valve stem 6 drop, and the oil channel on the side of the valve core 3 is connected with the pilot oil channel. The pilot pressure oil reaches the upper chamber of the valve core 3, and the valve core is closed. Continue to turn the adjusting handwheel 14 to lower the valve stem 6 to the bottom of the valve core 3, and the stop valve is completely closed. The operation process is shown in Figure 4 .

[0036] Compared with conventional high-pressure stop valves, the biggest feature is that this structure reduces the operating stroke under pressurized conditions, improving the original full-stroke operation of the valve core to the movement stroke of the ball 10, which can achieve rapid opening and closing and is suitable for emergency conditions.

[0037] If the shuttle valve 4 is not installed, the control oil circuit only selects either a or b, and the other circuit is not connected. The pressure in the upper chamber of the valve core 3 is the pressure corresponding to the main oil circuit A or B. At this time, the stop valve can only be opened by the channel that does not lead to the control oil circuit, which can realize the one-way opening and closing function.

[0038] The utility model is applied to a certain type of ship system with an instantaneous maximum flow of 2200L / min. It is necessary to install this large flow two-way cartridge valve type high-pressure stop valve on the oil line. According to the traditional pressure type two-way cartridge valve, DN63 is selected, and the area ratio of diameter D3 to diameter D1 is 1:1. D3 is 65mm, D1 is 46mm, and the annular area of ​​D1 and D2 is calculated to be 6644mm. 2 The diameter of the valve stem 6 is 16mm, the adjusting screw 12 is M12, and the applicable pressure range is ≤35MPa.

Claims

1. A large flow two-way cartridge valve type high pressure stop valve, characterized by: A large-flow two-way cartridge valve type high-pressure stop valve, including a valve seat, a valve core, a shuttle valve, a spring, a valve stem, a throttling screw plug, a cover plate body, a limit wire, a ball, a threaded seat, an adjusting screw, a nut, and a handwheel, wherein the valve seat and the valve core are combined into a plug-in, the valve stem, the throttling screw plug, the cover plate body, the limit wire, the ball, the threaded seat, the adjusting screw, the nut, and the handwheel are installed in the cover plate body to form a cover plate; the plug-in is installed in the oil circuit block, the shuttle valve is installed in the oil circuit block or integrated in the cover plate body, and the cover plate body is fixed to the oil circuit block by fasteners.

2. The large flow two-way cartridge valve type high pressure stop valve according to claim 1, characterized in that: Use a large flow two-way cartridge valve type high-pressure stop valve.

3. The large flow two-way cartridge valve type high pressure stop valve according to claim 1, characterized in that: The installation dimensions of the plug-in and cover body comply with DIN24342, ISO7368, and GB2877.

4. The large flow two-way cartridge valve type high pressure stop valve according to claim 1, characterized in that: When the oil circuit has a back pressure requirement, select a spring with corresponding stiffness according to the required back pressure.

5. The large flow two-way cartridge valve type high pressure stop valve according to claim 1, characterized in that: The valve seat and the bottom of the valve core on the main oil line are sealed with conical surface grinding, the side is sealed with O-ring or Gly ring, and the ball and valve stem on the control oil line are sealed with line contact. Therefore, when the valve core is closed, there is zero leakage between port A and port B.

6. The large flow two-way cartridge valve type high pressure stop valve according to claim 1, characterized in that: When the adjusting screw is turned to the closed position, the valve core is at the lowest point. At this time, the pressure oil of ports A and B passes through the shuttle valve, and the higher pressure oil reaches the upper cavity of the valve core through the flow channel in the valve stem. Because the area of ​​the upper cavity of the valve core is larger than the bottom area of ​​the valve core and the annular area of ​​the valve core, according to the force balance, the valve core will remain closed, and ports A and B are blocked; at this time, the handwheel is adjusted to lift the adjusting screw to the open position, and the pressure oil reaching the upper cavity of the valve core through the shuttle valve is drained through the top ball of the flow channel in the valve stem, and at the same time, the pressure oil of ports A and B is cut off by the cylindrical surface of the valve stem, and the higher pressure oil flows out through the shuttle valve. The oil in the upper cavity of the valve core reaches port Y without damping. At this time, when the pressure of any one of ports A and B reaches the spring set pressure value, the valve core overcomes the spring force and lifts upward under the action of the liquid pressure, and the valve core is in the open state, and ports A and B are connected.

7. The large flow two-way cartridge valve type high pressure stop valve according to claim 6, characterized in that: Channel a is drawn from port A, and channel b is drawn from port B. After comparison by the shuttle valve, the larger value passes through channels x, d, and c and reaches the upper chamber of the valve core, and acts on the top of the valve core, the bottom of the valve stem, and the bottom of the ball; when the area of ​​the valve core diameter D1 is S1, the area of ​​D2 is S2, and the area of ​​the rings of D1 and D2 is S3, the pressure in the upper chamber of the valve core is F=P(maxA / B)×S1, and the pressure in the lower chamber of the valve core is F=P(A)×S2+P(B)×S3.

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