Cover plate type two-way cartridge valve with displacement sensor

Abstract

The utility model provides a cover plate type two-way cartridge valve with a displacement sensor, which is fixed on an integrated block and is characterized in that the cover plate type two-way cartridge valve comprises a cartridge part and a control cover plate, the cartridge part is positioned in a standardized cavity hole of the integrated block, and the control cover plate is mounted and fixed on the integrated block; the plug-in mounting piece comprises a cover gasket, a valve sleeve, a valve element, an induction valve element and a reset spring. And a displacement sensor is arranged at the top of the control cover plate. According to the two-way cartridge valve, the displacement sensor is additionally arranged on the basis of a common two-way cartridge valve, so that the opening position of the valve element of the cartridge element can be measured with high precision, and meanwhile, the displacement sensor has high heat resistance and corrosion resistance and can be applied to severe environments; the application range of the system is wider and is not limited; moreover, the control cover plate is simple in structure, convenient to process, favorable for improving the overall quality and reducing the cost, and also convenient to assemble, disassemble and maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic control valves, in particular to a cover-plate type two-way cartridge valve with a displacement sensor. Background Art

[0002] Hydraulic transmission is a transmission method that uses liquid as the working medium to exchange, transmit and control energy. It has now become an irreplaceable and important basic technology in the modernization process of industry, agriculture, national defense and science and technology.

[0003] Hydraulic systems typically consist of two main components: hydraulic components (including energy components, actuators, hydraulic control components, and auxiliary components) and the working medium. Hydraulic control components come in a variety of sizes and are widely and flexibly applied. Hydraulic valves, when combined in different configurations, can form a variety of hydraulic systems. Hydraulic valves play a crucial role in hydraulic systems.

[0004] Among them, the two-way cartridge valve control is a modular and integrated hydraulic control element and technology that uses pilot control, seat valve main stage and cartridge hole connection. It usually includes the following components (such as Figure 1 Assembly cross-section of a conventional two-way cartridge valve of the structure shown):

[0005] (1) Insert 01: also known as the seat valve main stage or main valve assembly, usually composed of end cover, valve core, valve sleeve, spring, sealing assembly, etc.

[0006] (2) Control cover 02: usually forms the pilot control stage together with the pilot control valve and accessories, usually composed of the cover body, throttle screw plug, built-in micro pilot control element, etc.

[0007] (3) Control valve block: A metal block carrier used to install components such as plug-ins and control covers, and to combine and communicate the connections between them, including the connection between the main oil flow and the pilot control oil flow.

[0008] However, currently available two-way cartridge valves lack integrated pressure sensors and the ability to accurately measure the valve core's open position, compromising system reliability. High pressure, high temperature, or other harsh operating environments can cause system interference or failure. Furthermore, they cannot meet the stringent requirements of fields such as precision machinery and aerospace, limiting the system's applicability. Utility Model Content

[0009] In view of the deficiencies in the prior art, the present invention aims to provide a cover-plate two-way cartridge valve with a position sensor having an improved structure.

[0010] In order to achieve the above purpose, the solutions adopted by the present invention are as follows:

[0011] The utility model provides a cover-type two-way cartridge valve with a displacement sensor, which is fixed on an integrated block and comprises an insert and a control cover. The insert is located in a standardized cavity of the integrated block, and the control cover is mounted and fixed on the integrated block; wherein:

[0012] The insert comprises a cover gasket, a valve sleeve, a valve core, a sensing valve core and a reset spring. The cover gasket is located between the valve sleeve and the inner wall of the standardized cavity of the integrated block. The valve core is located in the valve sleeve. The valve core can move axially in the valve sleeve. A blind hole is provided at the top of the valve core. The sensing valve core and the reset spring are located in the blind hole. The reset spring is sleeved on the bottom of the sensing valve core.

[0013] The control cover plate is provided with a through hole coaxial with the blind hole of the valve core of the insert, the top of the sensing valve core is inserted into the through hole, a displacement sensor is arranged on the top of the control cover plate, the sensing push rod of the displacement sensor is inserted into the through hole of the control cover plate and connected to the top of the sensing valve core.

[0014] Preferably, a pressure chamber hydraulic oil circuit, an external control hydraulic oil circuit and a control hydraulic oil circuit are opened in the control cover plate; the pressure chamber hydraulic oil circuit is connected with the through hole of the control cover plate, and an oil port of the pressure chamber hydraulic oil circuit is formed on the side of the control cover plate, and a screw plug is inserted at the oil port of the pressure chamber hydraulic oil circuit; the external control hydraulic oil circuit is connected with the pressure chamber hydraulic oil circuit, and an oil port of the external control hydraulic oil circuit is formed at the bottom of the control cover plate, and a first sealing ring is provided at the oil port of the external control hydraulic oil circuit; one end of the control hydraulic oil circuit is connected with the control hydraulic oil circuit, and the other end is connected with the blind hole of the valve core of the plug-in component.

[0015] Preferably, a control oil circuit drilling channel is provided on the top of the integrated block, the control oil circuit drilling channel is communicated with the external control hydraulic oil circuit of the control cover plate, and the control oil circuit drilling channel is also communicated with the control oil port X.

[0016] Preferably, a main flow oil port A and a main flow oil port B are provided at the bottom of the plug-in component, and a drilling channel is also opened on the integrated block, and the drilling channel is communicated with the main flow oil port A and the main flow oil port B.

[0017] Preferably, a second sealing ring is provided on the contact surface between the top of the cover gasket of the insert and the bottom of the control cover plate.

[0018] Preferably, a third sealing ring is provided on the contact surface between the side surface of the cover gasket of the insert and the integrated block, and a third retaining ring is provided on the third sealing ring for protecting the third sealing ring from damage.

[0019] Preferably, on the side surface of the valve sleeve of the insert, there are provided a fourth sealing ring located in the middle of the valve sleeve and in contact with the inner wall of the cover gasket, and a fifth sealing ring located at the bottom of the valve sleeve and in contact with the inner wall of the integrated block, and a fourth retaining ring and a fifth retaining ring are respectively provided on the fourth sealing ring and the fifth sealing ring for protecting the fourth sealing ring and the fifth sealing ring from damage.

[0020] Preferably, a countersunk hole is provided at the bottom of the through hole of the control cover plate, one end of the reset spring abuts against the bottom of the blind hole at the top end of the valve core, and the other end abuts against the top of the countersunk hole of the control cover plate.

[0021] Preferably, an aerospace plug and a signal light connected to the aerospace plug are provided on the top of the displacement sensor, and information from the displacement sensor can be fed back to the signal light.

[0022] Preferably, at least one circle of balancing grooves is provided on the outer circumferential side surface of the valve core for storing tiny impurities in the oil, preventing the valve seat from getting stuck, and reducing wear between the valve core and the valve sleeve.

[0023] Beneficial effects

[0024] The utility model provides a cover-type two-way cartridge valve with a displacement sensor. A displacement sensor is added to an ordinary two-way cartridge valve, so that the opening position of the valve core of the cartridge can be measured with high precision. At the same time, the displacement sensor has strong heat resistance and corrosion resistance and can be used in harsh environments. The system has a wider range of applications and is not restricted. Moreover, the control cover of the utility model has a simple structure and is easy to process, which is conducive to improving overall quality and reducing costs, and is also convenient for assembly, disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an assembly cross-sectional view of the traditional two-way cartridge valve mentioned in the background technology of this utility model.

[0026] Figure 2 This is an assembly cross-sectional view of a cover-type two-way cartridge valve with a displacement sensor involved in the utility model.

[0027] Figure 3 It is a half-section view of the valve sleeve of the cover-plate two-way cartridge valve with a displacement sensor involved in the utility model.

[0028] Figure 4 It is a half-section view of the valve core of the cover-plate two-way cartridge valve with a displacement sensor involved in the utility model.

[0029] Figure 5 The utility model is a structural schematic diagram of the induction valve core and the induction push rod of the cover-type two-way cartridge valve with a displacement sensor. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or displacements based on the positions or displacements shown in the accompanying drawings, or the positions or displacements in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific position, be constructed, or operate in a specific position. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0035] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0036] To this end, the following solutions are proposed:

[0037] See also Figure 2 The utility model provides a cover-type two-way cartridge valve with a displacement sensor, which is fixed on an integrated block 300. It includes a control cover 100 and an insert 200. The insert 200 is located in a standardized cavity 301 of the integrated block 300. The control cover 100 is installed and fixed on the integrated block 300.

[0038] Specifically, the insert 200 includes a cover gasket 201, a valve sleeve 202, a valve core 203, a sensing valve core 204, and a return spring 205. The cover gasket 201 is located between the valve sleeve 202 and the inner wall of the standardized cavity 301 of the manifold 300, and is used to secure the insert 200, including the valve sleeve 202, valve core 203, sensing valve core 204, and return spring 205, within the standardized cavity 301 of the manifold 300. The valve core 203 is located within the valve sleeve 202 and can move axially within the valve sleeve 202. A blind hole 206 is defined at the top of the valve core 203, and the sensing valve core 204 and return spring 205 are located in the blind hole 206. The return spring 205 is sleeved on the bottom of the sensing valve core 204.

[0039] The control cover plate 100 is provided with a stepped through hole 101 coaxial with the blind hole 206 of the valve core 203 of the insert 200. The top of the sensing valve core 204 is inserted into the through hole 101. A displacement sensor 102 is provided on the top of the control cover plate 100. The sensing push rod 103 of the displacement sensor 102 is inserted into the through hole 101 of the control cover plate 100 and connected to the top of the sensing valve core 204. Figure 5 As shown, the lower portion of the sensing push rod 103 of the displacement sensor 102 is inserted into the hole at the top of the sensing valve core 204 .

[0040] In some embodiments, the displacement sensor 102 used in the present invention has strong heat resistance and corrosion resistance, and can be used stably in harsh environments, such as high temperature and corrosion environments. It can meet the high requirements of the precision machinery field and aerospace field, and the scope of application of the system is not limited.

[0041] As an embodiment of the present invention, a countersunk hole 109 is provided at the bottom of the stepped through hole 101 of the control cover plate 100, and a protruding end 2031 (such as Figure 4 As shown), one end of the return spring 205 abuts against the protruding end 2031 of the valve core 203 of the insert 200, and the other end abuts against the top of the counterbore 109 of the control cover 100.

[0042] As an embodiment of the present invention, an aerospace plug 110 and a signal light (not shown in the figure) connected to the aerospace plug 110 are provided on the top of the displacement sensor 102, and information of the displacement sensor 102 can be fed back to the signal light.

[0043] As one embodiment of the present invention, a pressure chamber hydraulic oil circuit 104, an external control hydraulic oil circuit 105, and a control hydraulic oil circuit 106 are provided in the control cover plate 100. The pressure chamber hydraulic oil circuit 104 is connected to the through hole 101 of the control cover plate 100, and an oil port for the pressure chamber hydraulic oil circuit 104 is formed on the side of the control cover plate 100, with a screw plug 107 inserted into the oil port of the pressure chamber hydraulic oil circuit 104. The external control hydraulic oil circuit 105 is connected to the pressure chamber hydraulic oil circuit 104, and an oil port for the external control hydraulic oil circuit 105 is formed on the bottom of the control cover plate 100, with a first sealing ring 108 provided at the oil port of the external control hydraulic oil circuit 105. One end of the control hydraulic oil circuit 106 is connected to the control hydraulic oil circuit 106, and the other end is connected to the blind hole 206 of the valve core 203 of the insert 200.

[0044] Furthermore, a control oil circuit drilling channel 302 is provided on the top of the integrated block 300 , and the control oil circuit drilling channel 302 is connected to the external control hydraulic oil circuit 105 of the control cover plate 100 , and the control oil circuit drilling channel 302 is also connected to the control oil port X of the two-way cartridge valve.

[0045] As one embodiment of the present invention, the bottom of the insert 200 is provided with a main flow oil port A and a main flow oil port B. A drilled channel 303 is also provided in the manifold block 300, communicating with the main flow oil port A and the main flow oil port B. When oil is supplied to the insert 200, hydraulic oil enters the working oil ports A and B, thereby driving the axial movement of the valve core 203 of the insert 200.

[0046] During operation of the cover-type two-way cartridge valve of the present invention, control oil enters through control oil port X, then enters control cover plate 100, flows sequentially through external control hydraulic oil circuit 105, pressure chamber hydraulic oil circuit 104, and control hydraulic oil circuit 106, and finally enters blind hole 206 of valve core 203 of cartridge 200, exerting a downward force on valve core 203, maintaining the valve core 203 in a closed state. If control oil is supplied through main flow oil port B, it exerts a force on the side of valve core 203, keeping the valve core 203 stationary and in a closed state. If the control oil enters from the main flow oil port A, it will generate a force on the bottom of the valve core 203. The pressure oil pushes the valve core 203 to overcome the return spring 205 and move upward axially, so that the sensing valve core 204 pushes the sensing push rod 103 of the displacement sensor 102, and finally pushes it to the displacement sensor 102. At this time, the valve core is opened, and the displacement signal sensed by the displacement sensor 102 is fed back to the signal light on the M12 4-pin aerospace plug 110. At this time, the signal light is on.

[0047] Combine Figure 1 、 Figure 3 and Figure 4 The control cover 100 is installed and fixed on the mounting surface 304 of the integrated block 300, and the plug-in component 200 is arranged in the standardized cavity 301 of the integrated block 300. The cover gasket 201 in the plug-in component 200 is cylindrical with a stepped through hole and is located at the top of the standardized cavity 301 of the integrated block 300. Its top end abuts against the bottom of the control cover 100. A second sealing ring 207 is provided on the contact surface between the top end of the cover gasket 201 and the bottom of the control cover 100.

[0048] The bottom of the cylindrical cover gasket 201 extends to the bottom of the drilling channel 302 of the integrated block 300. A third sealing ring 208 is provided on the contact surface between the side of the cover gasket 201 and the integrated block 300, and a third retaining ring 208a is provided on the third sealing ring 208 to protect the third sealing ring 208 from damage.

[0049] Furthermore, the cover gasket 201 fixes the plug-in component 200 including the valve sleeve 202, the valve core 203, the sensing valve core 204 and the reset spring 205 in the standardized cavity 301 of the integrated block 300, wherein most of the valve sleeve 202 is located in the stepped through hole of the cylindrical cover gasket 201, and the lower part of the valve sleeve 202 is fixed in the cavity 301 of the integrated block 300 and directly contacts the inner wall of the cavity 301 of the integrated block 300. On the side of the valve sleeve 202, there is provided a fourth sealing ring 209 located in the middle of the valve sleeve 202 and in contact with the inner wall of the cover gasket 201, and a fifth sealing ring 210 located at the bottom of the valve sleeve 202 and in contact with the inner wall of the integrated block 300, and accordingly, a fourth retaining ring 209a and a fifth retaining ring 210a are respectively provided on the fourth sealing ring 209 and the fifth sealing ring 210 for protecting the fourth sealing ring 209 and the fifth sealing ring 210 from damage. In some embodiments, two fourth retaining rings 209 a may be provided above and below the fourth sealing ring 209 , and two fifth retaining rings 210 a may be provided above and below the fifth sealing ring 210 .

[0050] In some embodiments, the first sealing ring 108, the second sealing ring 207, the third sealing ring 208, the fourth sealing ring 209, and the fifth sealing ring 210 are all high-pressure and high-temperature resistant sealing rings to enhance sealing, further reduce internal leakage, prevent hydraulic oil leakage and dust ingress, and maintain stable system pressure. Furthermore, the hydraulic oil ports all utilize conical seals to reduce leakage, making them suitable for low-viscosity working media such as emulsions, thereby extending the service life of the two-way cartridge valve.

[0051] Furthermore, the valve core 203 is located in the valve sleeve 202 and can move axially in the valve sleeve 202, such as Figure 4 As shown, a blind hole 206 is provided on the upper portion of the valve core 203 for accommodating a return spring 205, and three circles of balancing grooves 211 are provided on the outer circumferential side of the valve core 203 for the following purposes: first, to store tiny impurities in the oil to prevent the valve seat from getting stuck; second, to enable automatic centering. Under the action of oil pressure, the oil film in the matching gap between the outer circumference of the valve core 203 and the inner hole of the valve sleeve 202 becomes uniform, which can slow down wear and reduce internal leakage.

[0052] Furthermore, if Figure 3 and Figure 4As shown, a stepped through hole 212 is provided in the valve sleeve 202 for accommodating the valve core 203, so that the valve core 203 can move axially in the stepped through hole 212 of the valve sleeve 202. The drilling channel 302 of the manifold 300 always passes through the valve sleeve 202 horizontally, so a transverse through hole 213 is provided on the valve sleeve 202. Below the through hole 213, the diameter of the stepped through hole 212 in the valve sleeve 202 is smaller than that of the stepped through hole 213 above the through hole 213. 12 in diameter, and accordingly, the lower narrowed portion of the valve core 203 is inserted into the small-diameter stepped through hole 212 in the lower portion of the valve sleeve 202. Thus, after control oil enters from the main flow oil port A and exerts a force on the bottom of the valve core 203, the pressure oil pushes the valve core 203 to overcome the return spring 205 and move axially upward, causing the lower narrowed portion of the valve core 203 to slide out of the small-diameter stepped through hole 212 in the lower portion of the valve sleeve 202, thereby allowing control oil to enter the valve sleeve 202. Therefore, sealing surfaces 215 and 214 are formed between the lower narrowed portion of the valve core 203 and the small-diameter stepped through hole 212 in the valve sleeve 202. When the valve core 203 is stationary, under the action of the return spring 205, the entire lower narrowed part of the valve core 203 is stuck in the small-diameter stepped through hole 211 at the lower part of the valve sleeve 202, and the entire lower narrowed part of the valve core 203 is located in the small-diameter stepped through hole 211 at the lower part of the valve sleeve 202, that is, the sealing surface 215 and the sealing surface 214 are completely in contact with each other, and the valve core 203 and the valve sleeve 202 are completely sealed; when the control oil enters from the main flow oil port A and generates a force on the bottom of the valve core 203, the pressure oil pushes the valve core 203 to overcome the return spring 205 and move axially upward, the lower narrowed part of the valve core 203 slides out of the small-diameter stepped through hole 212 at the lower part of the valve sleeve 202, the sealing surface 215 separates from the sealing surface 214, and the control oil penetrates into the valve sleeve 202.

[0053] In a preferred embodiment, the sealing surface 215 of the valve core 203 and the sealing surface 214 of the valve sleeve 202 are both sealed with conical surfaces at the control oil penetration ports.

[0054] In the cover-type two-way cartridge valve provided by the present invention, the inner hole of the cover gasket 201, the inner hole 212 of the valve sleeve 202, the blind hole 206 of the valve core 203, the sealing ring groove of the outer circle of the cover gasket 201, the sealing ring groove of the outer circle of the valve sleeve 202 and the balancing groove of the outer circle of the valve core 203 are easy to process. The sealing surface 213 in the blind hole 206 of the valve core 203, the sealing surface 214 in the inner hole 212 of the valve sleeve 202 and their sealing cone surfaces all need to be ground to better cooperate with the up and down opening and closing of the valve core 203.

[0055] During assembly, the valve core 203 is assembled into the valve sleeve 202, and the cover gasket 201 is then installed on the end face of the valve core 203. The return spring 205 configured inside the valve core 203 affects the steady-state and dynamic performance of the cover-type two-way cartridge valve, so it can be equipped with a variety of spring stiffnesses to correspond to different opening pressures. The sensing valve core 204 is installed in the hole of the valve core 203. The sensing valve core 204 is fixed by the valve core 203 and the sensing push rod 103 to extend the length. After that, it is tightened 216 by using a punch, so that the lower part of the sensing push rod 103 is inserted into the hole at the top of the sensing valve core 204. Finally, the position sensor 102 is installed through threads. The top of the position sensor 102 is made into an M12 4-pin-M12 aerospace plug 110, and a signal light is connected to this 4-pin-M12 aerospace plug 110.

[0056] The cover plate type two-way cartridge valve provided by the utility model has a simple structure and is easy to manufacture, which is beneficial to improving the overall quality and reducing the cost, and is also convenient for assembly, disassembly and maintenance.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A cover-type two-way cartridge valve with a displacement sensor, fixed on an integrated block, characterized in that: It comprises an insert and a control cover, wherein the insert is located in a standardized cavity of the integrated block, and the control cover is mounted and fixed on the integrated block; wherein: The plug-in component includes a cover gasket, a valve sleeve, a valve core, an inductive valve core and a reset spring. The cover gasket is located between the valve sleeve and the inner wall of the standardized cavity of the integrated block. The valve core is located in the valve sleeve. The valve core can move axially in the valve sleeve. A blind hole is provided at the top of the valve core. The inductive valve core and the reset spring are located in the blind hole. The reset spring is sleeved at the bottom of the inductive valve core. The control cover plate is provided with a through hole coaxial with the blind hole of the valve core of the plug-in component, the top of the sensing valve core is inserted into the through hole, a displacement sensor is arranged on the top of the control cover plate, the sensing push rod of the displacement sensor is inserted into the through hole of the control cover plate and connected to the top of the sensing valve core.

2. The cover plate type two-way cartridge valve with a displacement sensor according to claim 1, characterized in that: A pressure chamber hydraulic oil circuit, an external control hydraulic oil circuit and a control hydraulic oil circuit are provided in the control cover plate; the pressure chamber hydraulic oil circuit is communicated with the through hole of the control cover plate, and an oil port of the pressure chamber hydraulic oil circuit is formed on the side of the control cover plate, and a screw plug is inserted into the oil port of the pressure chamber hydraulic oil circuit; The external control hydraulic oil circuit is communicated with the pressure chamber hydraulic oil circuit, and an oil port of the external control hydraulic oil circuit is formed at the bottom of the control cover plate, and a first sealing ring is arranged at the oil port of the external control hydraulic oil circuit; One end of the control hydraulic oil circuit is communicated with the control hydraulic oil circuit, and the other end is communicated with the blind hole of the valve core of the insert.

3. The cover plate type two-way cartridge valve with a displacement sensor according to claim 2, characterized in that: A control oil circuit drilling channel is arranged on the top of the integrated block, and the control oil circuit drilling channel is communicated with the external control hydraulic oil circuit of the control cover plate, and the control oil circuit drilling channel is also communicated with the control oil port X.

4. The cover plate type two-way cartridge valve with a displacement sensor according to claim 1, characterized in that: A main flow oil port A and a main flow oil port B are provided at the bottom of the plug-in component, and a drilling channel is also provided on the integrated block, and the drilling channel is communicated with the main flow oil port A and the main flow oil port B.

5. The cover plate type two-way cartridge valve with a displacement sensor according to claim 1, characterized in that: A second sealing ring is provided on the contact surface between the top of the cover pad of the plug-in component and the bottom of the control cover plate.

6. The cover plate type two-way cartridge valve with a displacement sensor according to claim 5, characterized in that: A third sealing ring is arranged on the contact surface between the side surface of the cover pad of the plug-in component and the integrated block, and a third retaining ring is arranged on the third sealing ring for protecting the third sealing ring from damage.

7. The cover plate type two-way cartridge valve with a displacement sensor according to claim 6, characterized in that: On the side of the valve sleeve of the insert, there are provided a fourth sealing ring which contacts the inner wall of the cover gasket and is located in the middle of the valve sleeve, and a fifth sealing ring which contacts the inner wall of the integrated block and is located at the bottom of the valve sleeve, and a fourth retaining ring and a fifth retaining ring are respectively provided on the fourth sealing ring and the fifth sealing ring for protecting the fourth sealing ring and the fifth sealing ring from damage.

8. The cover plate type two-way cartridge valve with a displacement sensor according to claim 1, characterized in that: A countersunk hole is arranged at the bottom of the through hole of the control cover plate, one end of the return spring abuts against the bottom of the blind hole at the top end of the valve core, and the other end abuts against the top of the countersunk hole of the control cover plate.

9. The cover plate type two-way cartridge valve with a displacement sensor according to claim 1, characterized in that: An aerospace plug and a signal light connected to the aerospace plug are arranged on the top of the displacement sensor, and information of the displacement sensor can be fed back to the signal light.

10. The cover plate type two-way cartridge valve with a displacement sensor according to claim 1, characterized in that: At least one circle of balancing grooves is provided on the outer circumferential side of the valve core to store tiny impurities in the oil, prevent the valve seat from getting stuck, and reduce the wear between the valve core and the valve sleeve.

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