Active opening type two-way logic valve with position monitoring function

Abstract

The utility model relates to the technical field of two-way logic valves, in particular to an active opening type two-way logic valve with a position monitoring function, which comprises a primary valve sleeve, a primary valve core, a primary return spring and a primary cover plate, and the primary valve sleeve, the primary valve core, the primary return spring and the primary cover plate form a primary structure. Through holes are formed in the middle of the main-stage valve sleeve and the middle of the main-stage cover plate, the main-stage valve sleeve is fixedly connected to the lower end of the main-stage cover plate, the main-stage valve element is slidably connected to the interior of the main-stage valve sleeve, the main-stage reset spring is located between the main-stage valve element and the main-stage valve sleeve, a port A is formed in the lower end of the main-stage valve sleeve, and a port B is formed in the middle of the main-stage valve sleeve. The upper end of the main stage cover plate is fixedly connected with a control cover plate, the middle of the upper end of the control cover plate is in threaded connection with a sensor flange, the upper end of the sensor flange is fixedly connected with an inductance type position sensor, active opening and closing of the main stage can be achieved, and main stage reversing can be guaranteed even if a main stage oil inlet loses pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of two-way logic valves, in particular to an active-opening two-way logic valve with position monitoring function. Background Art

[0002] With the development of direct-acting hydraulic equipment, the demand for large-flow safety hydraulic control components is increasing. In the past, the control of two-way logic valves was mostly to unload and load the valve core side to control the oil pressure to achieve the switching control of the main-stage two-way valve, which is a passive control type. When safety action control is required in certain practical working conditions, there may be risks. Utility Model Content

[0003] The purpose of the utility model is to provide an active-opening two-way logic valve with position monitoring to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a two-way logic valve with active opening with position monitoring, comprising a main-stage valve sleeve, a main-stage valve core, a main-stage return spring and a main-stage cover plate, wherein the main-stage valve sleeve, the main-stage valve core, the main-stage return spring and the main-stage cover plate constitute a main-stage structure, through holes are provided in the middle of the main-stage valve sleeve and the main-stage cover plate, the main-stage valve sleeve is fixedly connected to the lower end of the main-stage cover plate, the main-stage valve core is slidably connected to the inside of the main-stage valve sleeve, the main-stage return spring is located between the main-stage valve core and the main-stage valve sleeve, the lower end of the main-stage valve sleeve is provided with a port A, the middle of the main-stage valve sleeve is provided with a port B, the upper end of the main-stage cover plate is fixedly connected to a control cover plate, the middle of the upper end of the control cover plate is threadedly connected to a sensor flange, the upper end of the sensor flange is fixedly connected to an inductive position sensor, and the middle of the sensor flange is slidably connected to the An inductive sensor sensing rod is connected, both ends of the inductive sensor sensing rod pass through the sensor flange, the upper end of the inductive sensor sensing rod is inserted into the inductive position sensor, the middle of the control cover plate is slidably connected with the main-stage piston, the lower end of the main-stage piston is inserted into the upper end of the main-stage valve core, the lower end of the main-stage valve core is provided with a connecting screw, the upper end of the connecting screw and the lower end of the main-stage piston are threadedly connected, the lower end of the inductive sensor sensing rod is inserted into the upper end of the main-stage piston, the middle of the main-stage piston is fixedly connected with a sealing ring, the left side of the control cover plate is fixedly connected with a solenoid valve, the lower end of the control cover plate is provided with a control piston, the lower end of the control cover plate is provided with an X port and a Z port, the control piston is located at the X port and the Z port, the X port is connected to the lower cavity of the sealing ring through the solenoid valve, and the Z port is connected to the upper cavity of the main-stage piston through the solenoid valve.

[0005] Preferably, the upper end of the sealing ring is fixedly connected to the main-stage piston, a mounting cavity is formed between the inner wall of the sealing ring and the main-stage piston, a blocking ring is fixedly connected to the middle of the main-stage piston, a compensating oil bag is fixedly connected to the inner wall of the sealing ring, and an extrusion ring is sleeved in the middle of the main-stage piston.

[0006] Preferably, both the inner sidewall and the outer sidewall of the blocking ring are arc-shaped concave surfaces, and the sidewall of the compensation oil bag abuts against the outer sidewall of the blocking ring.

[0007] Preferably, the upper end of the extrusion block is provided with an inclined surface and a horizontal surface, the inclined surface of the extrusion ring is located at the lower end of the compensation oil bag, and the arc-shaped concave surface of the inner side wall of the extrusion ring is blocked above the horizontal surface of the extrusion ring.

[0008] Preferably, the lower end of the extrusion ring is fixedly connected to a connecting plate, the lower end of the connecting plate is fixedly connected to a deformation ring, the deformation ring is an elastic structure, the outer side wall of the deformation ring is fixedly connected to the sealing ring, and the inner side wall of the deformation ring is fixedly connected to the main stage piston.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] 1. The standard mounting hole of the two-way logic valve can be easily installed with various two-way standard valves;

[0011] 2. Integrated pilot valve design and main stage integrated connection, easy to use and install, reliable structure;

[0012] 3. Active control can realize active opening and closing of the main stage, and can ensure the main stage reversal even if the main stage oil inlet loses pressure;

[0013] 4. The inductive sensor design can monitor the closing and opening of the main stage valve core, which can realize the direct-acting design of hydraulic equipment and improve equipment safety;

[0014] 5. A sealing ring is provided on the side end of the main stage piston, which can compensate for the wear during active pressurization, increase the service life, and ensure that the active control will not fail. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the internal connections of a two-way logic valve.

[0016] Figure 2 This is an enlarged schematic diagram of point A.

[0017] In the figure: 1 main-stage valve sleeve, 2 main-stage valve core, 3 main-stage return spring, 4 control piston, 5 main-stage piston, 6 control cover, 7 inductive sensor sensing rod, 8 sensor flange, 9 inductive position sensor, 10 solenoid valve, 11 main-stage cover, 12 connecting screws, 13 blocking ring, 14 compensation oil bag, 15 extrusion ring, 16 connecting plate, 17 deformation ring, 18 sealing ring, 19 installation cavity. DETAILED DESCRIPTION

[0018] In order to deepen the understanding and recognition of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described and introduced in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the embodiments in any form. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-2The utility model provides a technical solution: a two-way logic valve with active opening with position monitoring, comprising a main-stage valve sleeve 1, a main-stage valve core 2, a main-stage return spring 3 and a main-stage cover plate 11. The main-stage valve sleeve 1, the main-stage valve core 2, the main-stage return spring 3 and the main-stage cover plate 11 constitute a main-stage structure. The two-way design can achieve hydraulic control with large flow and low pressure loss. Through holes are provided in the middle of the main-stage valve sleeve 1 and the main-stage cover plate 11. The main-stage valve sleeve 1 is fixedly connected to the lower end of the main-stage cover plate 11, and the main-stage valve core 2 is slidably connected to the main-stage cover plate 11. The main stage valve sleeve 1 is connected to the inside of the main stage valve sleeve 1, the main stage return spring 3 is located between the main stage valve core 2 and the main stage valve sleeve 1, the lower end of the main stage valve sleeve 1 is provided with a port A, the middle of the main stage valve sleeve 1 is provided with a port B, the upper end of the main stage cover plate 11 is fixedly connected to the control cover plate 6, the middle of the upper end of the control cover plate 6 is threadedly connected to the sensor flange 8, the upper end of the sensor flange 8 is fixedly connected to the inductive position sensor 9, the middle of the sensor flange 8 is slidably connected to the inductive sensor sensing rod 7, and both ends of the inductive sensor sensing rod 7 pass through the sensor. The upper end of the inductive sensor sensing rod 7 is inserted into the inductive position sensor 9. The middle of the control cover 6 is slidably connected with the main stage piston 5. The lower end of the main stage piston 5 is inserted into the upper end of the main stage valve core 2. The lower end of the main stage valve core 2 is provided with a connecting screw 12. The upper end of the connecting screw 12 is threadedly connected to the lower end of the main stage piston 5. The lower end of the inductive sensor sensing rod 7 is inserted into the upper end of the main stage piston 5. The middle of the main stage piston 5 is fixedly connected with a sealing ring 18. The left side of the control cover 6 is fixedly connected to the The electromagnetic valve 10 is connected, and the control piston 4 is provided at the lower end of the control cover plate 6. The lower end of the control cover plate 6 is provided with an X port and a Z1 port. The control piston 4 is located at the X port and the Z1 port. The X port is communicated with the lower cavity of the sealing ring 18 through the electromagnetic valve 10, and the Z1 port is communicated with the upper cavity of the main stage piston 5 through the electromagnetic valve 10. The control cover plate (6) and the electromagnetic valve (10) realize the control of the pilot stage. The sensor plug on the inductive position sensor 9 can realize the monitoring of the opening and closing of the two-way logic valve, thereby playing a safety control function.

[0020] The upper end of the sealing ring 18 is fixedly connected to the main-stage piston 5, and a mounting chamber 19 is formed between the inner wall of the sealing ring 18 and the main-stage piston 5. A blocking ring 13 is fixedly connected to the middle of the main-stage piston 5, and a compensation oil bag 14 is fixedly connected to the inner wall of the sealing ring 18. An extrusion ring 15 is sleeved in the middle of the main-stage piston 5. The inner and outer side walls of the blocking ring 13 are both arc-shaped concave surfaces. The side walls of the compensation oil bag 14 abut against the outer wall of the blocking ring 13. The upper end of the extrusion block is provided with an inclined surface and a horizontal surface. The inclined surface of the extrusion ring 15 is located at the lower end of the compensation oil bag 14. The arc-shaped concave surface of the inner side wall of the blocking ring 13 is above the horizontal surface of the extrusion ring 15. The lower end of the extrusion ring 15 is fixedly connected to a connecting plate 16, and the lower end of the connecting plate 16 is fixedly connected to a deformation ring 17. The deformable ring 17 is an elastic structure. The outer wall of the deformable ring 17 is fixedly connected to the sealing ring 18, and the inner wall of the deformable ring 17 is fixedly connected to the main-stage piston 5. When the pilot control oil enters the control port X of the control cover plate 6 and pressurizes the lower chamber of the main-stage piston 5 through the reversing of the solenoid valve 10, the sealing ring can ensure the sealing, thereby lifting the main-stage piston 5. After long-term use, the outer wall of the sealing ring wears. When the pilot control oil is pressurized, the deformable plate will be deformed due to pressure, thereby pushing the extrusion ring to move upward. The inclined surface of the extrusion ring squeezes the compensation oil bag, thereby moving the oil in the compensation oil bag to compensate for the wear of the sealing ring, thereby ensuring the sealing, allowing the main-stage piston 5 to move smoothly, and avoiding active control failure.

[0021] Active control function: When in use, port A of the main stage is connected to the load via port B. Pilot control oil enters from port X of the control cover plate 6 and pressurizes the lower chamber of the main stage piston 5 through the reversing of the solenoid valve 10, thereby realizing the active opening of the main stage valve core 5. Alternatively, pilot oil is loaded through the Z1 control oil port to pressurize the upper chamber of the main stage piston 5, thereby realizing the active closing of the main stage valve core.

[0022] Safety monitoring function: When the main-stage valve core 2 is controlled to open, the sensor sensing rod 7 will be displaced, so that the position setting of the inductive position sensor 9 can be used to monitor whether the main-stage valve core 2 is opened. The sensor plug on the inductive position sensor 9 can be used to monitor the opening and closing of the two-way logic valve, thereby playing a safety control function.

[0023] Although the embodiments of the present invention have been shown and described, it should be emphasized that the above description is merely an introduction and description of the use of the embodiments of the present invention and does not limit the present invention in any form. It will be understood by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A two-way logic valve with active opening function and position monitoring, comprising a main-stage valve sleeve (1), a main-stage valve core (2), a main-stage return spring (3) and a main-stage cover plate (11), characterized in that: The main stage valve sleeve (1), the main stage valve core (2), the main stage return spring (3) and the main stage cover plate (11) form a main stage structure. Through holes are provided in the middle of the main stage valve sleeve (1) and the main stage cover plate (11). The main stage valve sleeve (1) is fixedly connected to the lower end of the main stage cover plate (11). The main stage valve core (2) is slidably connected to the inside of the main stage valve sleeve (1). The main stage return spring (3) is located between the main stage valve core (2) and the main stage valve sleeve (1). The lower end of the main stage valve sleeve (1) is fixedly connected to the lower end of the main stage cover plate (11). A port A is provided, a port B is provided in the middle of the main stage valve sleeve (1), the upper end of the main stage cover plate (11) is fixedly connected to a control cover plate (6), the middle of the upper end of the control cover plate (6) is threadedly connected to a sensor flange (8), the upper end of the sensor flange (8) is fixedly connected to an inductive position sensor (9), the middle of the sensor flange (8) is slidably connected to an inductive sensor sensing rod (7), and both ends of the inductive sensor sensing rod (7) pass through the sensor flange (8). The upper end of the inductive sensor sensing rod (7) is inserted into the inductive position sensor (9), the middle of the control cover (6) is slidably connected to the main stage piston (5), the lower end of the main stage piston (5) is inserted into the upper end of the main stage valve core (2), the lower end of the main stage valve core (2) is provided with a connecting screw (12), the upper end of the connecting screw (12) is threadedly connected to the lower end of the main stage piston (5), the lower end of the inductive sensor sensing rod (7) is inserted into the upper end of the main stage piston (5), and the lower end of the main stage piston (5) is inserted into the upper end of the main stage piston (5). The middle of the main stage piston (5) is fixedly connected with a sealing ring (18), the left side of the control cover plate (6) is fixedly connected with a solenoid valve (10), the lower end of the control cover plate (6) is provided with a control piston (4), the lower end of the control cover plate (6) is provided with an X port and a Z1 port, the control piston (4) is located at the X port and the Z1 port, the X port is communicated with the lower cavity of the sealing ring (18) through the solenoid valve (10), and the Z1 port is communicated with the upper cavity of the main stage piston (5) through the solenoid valve (10).

2. The two-way logic valve with active opening function and position monitoring according to claim 1, characterized in that: The upper end of the sealing ring (18) is fixedly connected to the main stage piston (5), and a mounting cavity (19) is formed between the inner wall of the sealing ring (18) and the main stage piston (5). A blocking ring (13) is fixedly connected to the middle of the main stage piston (5), a compensation oil bag (14) is fixedly connected to the inner wall of the sealing ring (18), and an extrusion ring (15) is sleeved in the middle of the main stage piston (5).

3. The two-way logic valve with active opening function and position monitoring according to claim 2, characterized in that: The inner side wall and the outer side wall of the blocking ring (13) are both arc-shaped concave surfaces, and the side wall of the compensation oil bag (14) abuts against the outer side wall of the blocking ring (13).

4. The two-way logic valve with active opening function and position monitoring according to claim 2, characterized in that: The upper end of the extrusion block is provided with an inclined surface and a horizontal surface. The inclined surface of the extrusion ring (15) is located at the lower end of the compensation oil bag (14). The arc-shaped concave surface of the inner side wall of the blocking ring (13) is located above the horizontal surface of the extrusion ring (15).

5. The two-way logic valve with active opening function and position monitoring according to claim 2, characterized in that: The lower end of the extrusion ring (15) is fixedly connected to a connecting plate (16), and the lower end of the connecting plate (16) is fixedly connected to a deformation ring (17). The deformation ring (17) is an elastic structure, and the outer side wall of the deformation ring (17) is fixedly connected to the sealing ring (18), and the inner side wall of the deformation ring (17) is fixedly connected to the main stage piston (5).

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