Hydraulic control valve and hydraulic operating mechanism

Abstract

The invention relates to a hydraulic control valve and a hydraulic operating mechanism. The hydraulic control valve comprises an outer valve shell, a valve sleeve assembly, a valve element and a paddle. The outer valve shell is provided with a valve cavity. The valve sleeve assembly is arranged in the valve cavity and comprises a left valve sleeve and a right valve sleeve, the left valve sleeve and the right valve sleeve are provided with a left moving cavity and a right moving cavity respectively, the right valve sleeve is further provided with a first connecting cavity communicated with the right moving cavity, and the first connecting cavity is used for inputting normal high-pressure oil; the valve element is slidably assembled in the valve sleeve assembly, and the two ends of the valve element are arranged in the left moving cavity and the right moving cavity correspondingly. The paddle is arranged at one end of the valve element and located in the right moving cavity, and the paddle rotates and moves towards the left moving cavity under the acting force of the normal high-pressure oil input by the first connecting cavity so that the paddle can drive the valve element to move to the closing position on the sliding stroke. In other words, rotary motion is added on the basis of linear motion, static friction force brought by a sealing ring on the valve element is overcome in a composite mode, and then the stability of the switching-on action of the operating mechanism is improved.

Description

Technical Field

[0001] The present application relates to the technical field of high-voltage switchgear, and in particular to a hydraulic control valve and a hydraulic operating mechanism. Background Art

[0002] Hydraulic operating mechanisms are widely used in power grid systems with voltage levels of 252kV and above. In hydraulic operating mechanisms, hydraulic control valves are not only the core components of hydraulic operating mechanisms, but also the most sophisticated part of hydraulic operating mechanisms. The hydraulic control valves play the role of receiving opening and closing instructions and completing hydraulic system state switching.

[0003] The current hydraulic control valve is a two-position three-way sliding valve structure, for example, a hydraulic operating mechanism, a control valve and a main valve of the control valve disclosed in the Chinese patent application number 201810565783.6. In the above patent, when the valve is closed, the valve stem slides back and forth in the valve sleeve, and different oil chambers are sealed by the valve port and the sliding sealing ring. The sealing ring is made of rubber. The static friction of the sealing ring after being stationary is significantly greater than the sliding friction, which greatly affects the stability of the hydraulic operating mechanism when closing.

[0004] To solve the above problem, the thrust generated by the area difference between different regions of the valve stem is currently used to forcibly overcome the static friction force. However, the effect of the above method is not obvious, and the stability of the closing action of the hydraulic operating mechanism still needs to be improved. Summary of the invention

[0005] Based on this, it is necessary to provide a hydraulic control valve and a hydraulic operating mechanism to address the problem of poor stability of the closing action of the current operating mechanism.

[0006] A hydraulic control valve, comprising an outer valve housing, a valve sleeve assembly, a valve core and a paddle, wherein:

[0007] The outer valve housing has a valve cavity;

[0008] The valve sleeve assembly is arranged in the valve cavity, and comprises a left valve sleeve and a right valve sleeve, wherein the left valve sleeve and the right valve sleeve respectively have a left moving cavity and a right moving cavity, and the right valve sleeve also has a first connecting cavity connected to the right moving cavity, and the first connecting cavity is used to input normal high-pressure oil;

[0009] The valve core is slidably and sealingly assembled in the valve sleeve assembly, and its two ends are respectively arranged in the left moving chamber and the right moving chamber;

[0010] The paddle is arranged at one end of the valve core and is located in the right moving chamber. The paddle is rotated and moved toward the left moving chamber by the force of the normally high-pressure oil input from the first connecting chamber, so that the paddle drives the valve core to move to the closing position on the sliding stroke.

[0011] In one embodiment, the outer valve housing is further provided with a second connecting chamber connected with the first connecting chamber, and a gate-opening pilot valve is arranged on the second connecting chamber, and the gate-opening pilot valve is used for pressure relief, and the left movable chamber is used for inputting the normally high-pressure oil, and the normally high-pressure oil acts on the valve core after the gate-opening pilot valve relieves pressure, so that the valve core moves toward the right movable chamber to the gate-opening position on the sliding stroke.

[0012] In one embodiment, the paddle includes a connecting shaft and a rotating shaft sleeved on the outside of the connecting shaft, the connecting shaft is connected to the valve core, a plurality of rotating grooves spaced apart from each other are provided on the rotating shaft, and a rotating blade is formed between two adjacent rotating grooves.

[0013] In one embodiment, the rotating shaft has a first end surface close to the valve core and a second end surface away from the valve core, and the direction in which the first end surface extends toward the second end surface is a first direction;

[0014] The rotation groove opens at the outer wall of the rotation shaft and extends along the first direction to the second end surface, and along the first direction, the opening depth of the rotation groove gradually increases.

[0015] In one embodiment, the rotation groove has an opening line extending in the length direction along the circumference of the rotation axis, one end of the opening line has an arc segment extending to the second end surface, and the arc segment forms a guide surface with the corresponding groove wall in the rotation groove.

[0016] In one of the embodiments, the groove wall of the rotating groove further has a receiving surface arranged at a preset angle with the guide surface.

[0017] In one of the embodiments, in the open position, the first connecting cavity is arranged opposite to the paddle.

[0018] In one embodiment, the hydraulic control valve also includes a control module, a detection module and an alarm that are communicatively connected to the control module. The detection module is arranged in the outer valve housing and is used to detect the measured oil pressure information in the second connecting chamber. The control module controls the activation of the alarm according to the measured oil pressure information.

[0019] The hydraulic control valve is provided with a paddle connected to one end of the valve core. The paddle is rotated and moved toward the left moving chamber by the force of the normally high pressure oil input from the first connecting chamber, so that the paddle drives the valve core to move to the closing position on the sliding stroke. That is, the present application adds rotational motion on the basis of linear motion, and overcomes the static friction caused by the sealing ring on the valve core in a composite form, so that the action of the valve core when switching the state is more stable, thereby improving the stability of the closing action of the hydraulic operating mechanism.

[0020] The present application also provides a method for monitoring a hydraulic control valve, comprising the following steps:

[0021] Providing the hydraulic control valve described in the previous embodiment;

[0022] The detection module detects the measured oil pressure information in the second connecting chamber, and transmits the measured oil pressure information to the control module;

[0023] The control module draws a measured oil pressure fluctuation curve according to the measured oil pressure information, generates a control signal according to the measured oil pressure fluctuation curve and a preset reference fluctuation curve, and transmits the control signal to the alarm;

[0024] The alarm is activated according to the received control signal.

[0025] The present application also provides a hydraulic operating mechanism, which includes a hydraulic control valve as described in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic diagram of the structure of a hydraulic control valve provided in the present application.

[0027] FIG. 2 is a schematic diagram of an installation structure of a valve core and a paddle provided in the present application.

[0028] FIG3 is a schematic diagram of the structure of a blade provided in the present application.

[0029] FIG. 4 is a schematic structural diagram of the blade in FIG. 3 from another perspective.

[0030] FIG. 5 is a schematic diagram of another installation structure of the valve core and the paddle provided in the present application.

[0031] in:

[0032] 10. Hydraulic control valve; a. first direction; 100. outer valve housing; 110. valve chamber; 120. T chamber; 130. P chamber; 140. Z chamber; 150. second connecting chamber;

[0033] 200, valve sleeve assembly; 210, left valve sleeve; 211, left movable chamber; 2111, A chamber; 2112, B chamber; 212, valve port at closing position; 220, right valve sleeve; 221, right movable chamber; 2211, C chamber; 2212, D chamber; 222, valve port at opening position; 223, first connecting chamber; 230, connecting pipeline;

[0034] 300, valve core; 310, first end; 320, second end; 330, valve shaft; 340, sealing ring;

[0035] 400, blade; 410, connecting shaft; 420, rotating shaft; 421, rotating groove; 4211, opening line; 4212, arc segment; 4213, guide surface; 4214, receiving surface; 422, rotating blade; 423, first end surface; 424, second end surface;

[0036] 500. Detection module; 600. Control module. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0038] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0039] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0041] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0043] Referring to FIG. 1 and FIG. 2, FIG. 1 shows a schematic diagram of the structure of a hydraulic control valve 10 in an embodiment of the present application. FIG. 2 shows a schematic diagram of an installation structure of a valve core 300 and a paddle 400 in an embodiment of the present application. The hydraulic control valve 10 provided in an embodiment of the present application includes an outer valve housing 100, a valve sleeve assembly 200, a valve core 300 and a paddle 400, wherein the outer valve housing 100 has a valve cavity 110, and in a specific configuration, the outer valve housing 100 is provided with a T cavity 120, a P cavity 130 and a Z cavity 140 connected to the valve cavity 110, the Z cavity 140 is located between the T cavity 120 and the P cavity 130, the Z cavity 140 is used to connect the rodless cavity of the hydraulic cylinder, the Z cavity 140 is the control oil cavity of the entire mechanism, the T cavity 120 is used to connect the system oil tank and is a low-pressure oil channel, that is, the T cavity 120 can transport low-pressure oil, the P cavity 130 is used to connect the accumulator and is a normally high-pressure oil channel, that is, the P cavity 130 can transport normally high-pressure oil.

[0044] The valve sleeve assembly 200 is arranged in the valve cavity 110. The valve sleeve assembly 200 includes a left valve sleeve 210 and a right valve sleeve 220. The left valve sleeve 210 and the right valve sleeve 220 are respectively provided with a left moving cavity 211 and a right moving cavity 221. In a specific setting, the right end opening of the left valve sleeve 210 forms a valve port 212 at the closed position, and the left end opening of the right valve sleeve 220 forms a valve port 222 at the open position. The valve core 300 is slidably and sealedly assembled in the valve sleeve assembly 200. The two ends of the valve core 300 are respectively arranged in the left moving cavity 211 and the right moving cavity 221. In a specific setting, the two ends of the valve core 300 are respectively a first end 310 and a second end 320, and the first end 310 and the second end are correspondingly located in the left moving cavity 211 and the right moving cavity 221. The first end 310 and the second end 320 are both provided with a sealing ring 340. The middle section of the valve core 300 is provided with a valve shaft 330 whose radial dimension is larger than that of the two end sections. The outer peripheral surfaces of the two ends of the large diameter section of the valve shaft 330 are conical surfaces, which are respectively used to seal with the closed position valve port 212 and the open position valve port 222 in the form of line seals.

[0045] It should be noted that the valve core 300 has a closed position and an open position during the process of opening and closing. In the closed position, one end face of the valve shaft 330 in the valve core 300 is in sealing contact with the closing position valve port 212. At this time, the T chamber 120 is separated from the Z chamber 140, and the P chamber 130 is connected to the Z chamber 140 through the open position valve port 222; in the open position, the other end face of the valve shaft 330 in the valve core 300 is in sealing contact with the open position valve port 222. At this time, the P chamber 130 is separated from the Z chamber 140, and the T chamber 120 is connected to the Z chamber 140 through the closing position valve port 212.

[0046] The right valve sleeve 220 is also provided with a first connecting chamber 223 connected to the right moving chamber 221. The first connecting chamber 223 is used to input high-pressure oil. The paddle 400 is arranged at one end of the valve core 300, and the paddle 400 is located in the right moving chamber 221. The paddle 400 is rotated and moved toward the left moving chamber 211 by the force of the high-pressure oil input from the first connecting chamber 223, so that the paddle 400 drives the valve core 300 to move to the closing position on the sliding stroke. It should be emphasized that the paddle 400 structure will produce an effect similar to rifling, but avoids the problem of damaging the sliding seal caused by adding rifling to the valve chamber 110.

[0047] The hydraulic control valve 10 is provided with a paddle 400 connected to one end of the valve core 300. The paddle 400 is rotated and moved toward the left moving chamber 211 by the force of the normally high pressure oil input from the first connecting chamber 223, so that the paddle 400 drives the valve core 300 to move to the closing position on the sliding stroke. That is, the present application adds rotational motion on the basis of linear motion, and overcomes the static friction caused by the sealing ring 340 on the valve core 300 in a composite form, so that the action of the valve core 300 when switching the state is more stable, thereby improving the stability of the closing action of the operating mechanism.

[0048] It should be noted that the provision of the paddle 400 is also conducive to improving the stability of the gate opening process. In the present application, the outer valve housing 100 is further provided with a second connecting chamber 150 connected to the first connecting chamber 223. A gate opening pilot valve is provided on the second connecting chamber 150. The gate opening pilot valve is used for pressure relief. The left movable chamber 211 is used for inputting normal high-pressure oil. The normal high-pressure oil acts on the valve core 300 after the gate opening pilot valve is pressure-relieved, so that the valve core 300 moves toward the right movable chamber 221 to the gate opening position on the sliding stroke. Through the above-mentioned provision, in the process of the normal high-pressure oil in the left movable chamber 211 pushing the valve core 300 to move rightward to the gate opening position, the provision of the paddle 400 is conducive to the gas and residual liquid in the right movable chamber 221 being discharged from the first connecting chamber 223 more quickly, so that the movement process of the valve core 300 is smoother, thereby improving the stability of the gate opening process. In the specific setting, a closing pilot valve is also provided on the second connecting chamber 150, and the closing pilot valve is used to input normal high-pressure oil. The normal high-pressure oil flows into the second connecting chamber 150 through the closing pilot valve and then flows to the first connecting chamber 223, providing power for the closing movement of the valve core 300.

[0049] In order to enable the closing pilot valve to conveniently provide normal high-pressure oil so as to subsequently push the valve core 300 to move left, in the specific setting, the second end 320 in the valve core 300 divides the right moving chamber 221 into a C chamber 2211 and a D chamber 2212, wherein the C chamber 2211 is connected to the first connecting chamber 223, and the closing pilot valve is connected to the P chamber 130. The normal high-pressure oil in the P chamber 130 flows into the second connecting chamber 150 through the closing pilot valve, then flows through the first connecting chamber 223 and then flows to the C chamber 2211. The normal high-pressure oil in the C chamber 2211 acts on the second end 320 in the valve core 300 to realize the left movement of the valve core 300.

[0050] In order to more conveniently realize the delivery of normally high-pressure oil in the left moving chamber 211 to push the valve core 300 to move right, in the specific setting, the D chamber 2212 is connected with the P chamber 130, and the normally high-pressure oil in the P chamber 130 flows into the D chamber 2212. The first end 310 in the valve core 300 divides the left moving chamber 211 into the A chamber 2111 and the B chamber 2112. The A chamber 2111 is connected with the D chamber 2212 through the connecting pipe 230, then the normally high-pressure oil in the D chamber 2212 flows into the A chamber 2111 through the connecting pipe 230, and the B chamber 2112 is connected with the T chamber 120. The B chamber 2112 contains the low-pressure oil in the T chamber 120, which is beneficial for the normally high-pressure oil in the A chamber 2111 to push the valve core 300 to move right. Through the above arrangement, when the gate needs to be opened, the normal high pressure oil in the C chamber 2211 is first discharged to the T chamber 120 through the first connecting chamber 223 and the second connecting chamber 150 through the gate opening pilot valve, and then the normal high pressure oil in the A chamber 2111 pushes the valve core 300 to move right to realize the gate opening operation. In the specific arrangement, the shape of the connecting pipeline 230 is preferably U-shaped but is not limited to the above U-shaped, and can be any other geometric shape.

[0051] It should be noted that, when closing the gate, the normally high-pressure oil in the C chamber 2211 can also come from the A chamber 2111 through the closing pilot valve, that is, the closing pilot valve is connected to the A chamber 2111. Through the above arrangement, when closing the gate is required, the closing pilot valve is first started, and the normally high-pressure oil in the A chamber 2111 is replenished to the C chamber 2211, so that the pressure of the A chamber 2111 drops, and the speed at which the normally high-pressure oil in the C chamber 2211 pushes the valve core 300 to move left is accelerated, thereby playing a role in accelerating the closing start.

[0052] As shown in FIG. 3 and FIG. 4 , FIG. 3 is a schematic diagram of the structure of a blade 400 provided in an embodiment of the present application, and FIG. 4 is a schematic diagram of the structure of the blade 400 in FIG. 3 from another perspective. In order to design the blade 400 more conveniently, in a preferred embodiment, the blade 400 includes a connecting shaft 410 and a rotating shaft 420 sleeved on the outside of the connecting shaft 410, the connecting shaft 410 is connected to the valve core 300, and a plurality of rotating grooves 421 spaced apart are provided on the rotating shaft 420, and a rotating blade 422 is formed between two adjacent rotating grooves 421. In a specific setting, the connecting shaft 410 is connected to the second end 320 of the valve core 300, and specifically, the second end 320 may be provided with a mounting hole for fixing the connecting shaft 410, and a plurality of rotating grooves 421 are provided on the side of the rotating shaft 420 away from the second end 320, and the specific number of the rotating grooves 421 may be 2, 3, 5 or more.

[0053] In order to receive more high-pressure oil to achieve rapid rotation, specifically, the rotating shaft 420 has a first end face 423 close to the valve core 300 and a second end face 424 away from the valve core 300, the direction in which the first end face 423 extends toward the second end face 424 is the first direction a, the rotating groove 421 opens at the outer wall of the rotating shaft 420 and extends to the second end face 424 along the first direction a, and along the first direction a, the opening depth of the rotating groove 421 gradually deepens. In the specific setting, the rotating groove 421 has an opening line 4211 extending along the circumference of the rotating shaft 420 in the length direction, and one end of the opening line 4211 has an arc segment 4212 extending to the second end face 424, and the arc segment 4212 and the corresponding groove wall in the rotating groove 421 form a guide surface 4213. Through the above setting, the guide surface 4213 can be regarded as the oil-facing surface of the blade, and the arc segment 4212 is more suitable for the entry of high-pressure oil, thereby exerting a force on the blade to drive the blade to rotate.

[0054] Furthermore, the groove wall of the rotating groove 421 also has a receiving surface 4214 arranged at a preset angle with the guide surface 4213. In the specific arrangement, the receiving surface 4214 is preferably a fan-shaped structure. Through the above arrangement, part of the normally high-pressure oil entering from the guide surface 4213 will flow to the receiving surface 4214, and the blades will rotate by applying pressure to the receiving surface 4214.

[0055] In order to enhance the rotation of the blade 400, specifically, in the off position, the first connecting chamber 223 is arranged opposite to the blade 400. In the specific arrangement, in order to further increase the fluid impact effect when the switch is closed and started, the cavity flow channels of the first connecting chamber 223 and the second connecting chamber 150 have the same shape, and the cavity flow channels of the two can use inclined holes to dock with the extension direction of the guide surface 4213 in the blade 400 to increase the rotation effect of the blade 400.

[0056] It should be noted that the present application preferably sets the paddle 400 at the second end 320 of the valve core 300. In addition, it can also be set on the valve shaft 330 in the valve core 300. For details, please refer to another installation structure diagram of the valve core 300 and the paddle 400 shown in Figure 5. It should be emphasized that the setting position of the paddle 400 is not limited to the above two places, and the position that can achieve the paddle 400 driving the valve core 300 to rotate is sufficient.

[0057] In order to obtain the operating status of the hydraulic control valve 10 in time and to handle abnormal situations in time, specifically, the hydraulic control valve 10 also includes a control module 600, a detection module 500 and an alarm connected to the control module 600 in communication, the detection module 500 is arranged in the outer valve housing 100 and is used to detect the measured oil pressure information in the second connecting chamber 150, and the control module 600 controls the start of the alarm according to the measured oil pressure information. It should be noted that by detecting the oil pressure in the second connecting chamber 150, it can be indirectly equivalent to obtaining the oil pressure fluctuation in the C chamber 2211, so as to judge whether the hydraulic control valve 10 is in the closed or open state, and compare the judged state with the state that the hydraulic control valve 10 should be in at this time in the preset state. If the two do not match, the control module 600 controls the alarm to alarm. In the specific setting, the detection module 500 can be an oil pressure sensor. In addition, the detection module 500 can also be a flow sensor or other sensor that can reflect the change in liquid. The control module 600 is a PLC controller.

[0058] The present application also provides a monitoring method of a hydraulic control valve 10, comprising the following steps:

[0059] Step S1, provide the hydraulic control valve 10 described in the previous embodiment; Step S2, the detection module 500 detects the measured oil pressure information in the second connecting chamber 150, and the detection module 500 transmits the measured oil pressure information to the control module 600; Step S3, the control module 600 draws a measured oil pressure fluctuation curve according to the measured oil pressure information, and generates a control signal according to the measured oil pressure fluctuation curve and a preset reference fluctuation curve, and the control module 600 transmits the control signal to the alarm. In the specific setting, the measured oil pressure fluctuation curve is formed by the time of the X-axis and the measured oil pressure information of the Y-axis, and the preset reference fluctuation curve is the reference oil pressure information corresponding to the opening and closing time period under normal conditions. If the deviation between the measured oil pressure information and the reference oil pressure information is large at the same time, there is a fault such as the valve core 300 not moving into place or leakage, and the control module 600 generates a control signal at this time; through step S4, the alarm is started according to the received control signal.

[0060] The present application also provides a hydraulic operating mechanism, which includes the hydraulic control valve 10 as described in any of the above embodiments.

[0061] The hydraulic operating mechanism is provided with a paddle 400 connected to one end of the valve core 300 in the hydraulic control valve 10. The paddle 400 is rotated and moved toward the left moving chamber 211 by the force of the normally high pressure oil input from the first connecting chamber 223, so that the paddle 400 drives the valve core 300 to move to the closing position on the sliding stroke. That is, the present application adds rotational motion on the basis of linear motion, and overcomes the static friction caused by the sealing ring 340 on the valve core 300 in a composite form, so that the action of the valve core 300 when switching the state is more stable, thereby improving the stability of the closing action of the hydraulic operating mechanism.

[0062] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A hydraulic control valve, characterized in that: The hydraulic control valve comprises an outer valve housing, a valve sleeve assembly, a valve core and a paddle, wherein: The outer valve housing has a valve cavity; The valve sleeve assembly is arranged in the valve cavity, and comprises a left valve sleeve and a right valve sleeve, wherein the left valve sleeve and the right valve sleeve respectively have a left moving cavity and a right moving cavity, and the right valve sleeve also has a first connecting cavity connected to the right moving cavity, and the first connecting cavity is used to input normal high-pressure oil; The valve core is slidably and sealingly assembled in the valve sleeve assembly, and its two ends are respectively arranged in the left moving chamber and the right moving chamber; The paddle is arranged at one end of the valve core and is located in the right moving chamber. The paddle is rotated and moved toward the left moving chamber by the force of the normally high-pressure oil input from the first connecting chamber, so that the paddle drives the valve core to move to the closing position on the sliding stroke.

2. The hydraulic control valve according to claim 1, characterized in that: The outer valve housing is also provided with a second connecting chamber connected with the first connecting chamber, and a gate-opening pilot valve is arranged on the second connecting chamber, and the gate-opening pilot valve is used for pressure relief. The left movable chamber is used for inputting the normally high-pressure oil, and the normally high-pressure oil acts on the valve core after the gate-opening pilot valve relieves pressure, so that the valve core moves toward the right movable chamber to the gate-opening position on the sliding stroke.

3. The hydraulic control valve according to claim 1, characterized in that: The paddle comprises a connecting shaft and a rotating shaft sleeved on the outside of the connecting shaft, the connecting shaft is connected to the valve core, a plurality of rotating grooves spaced apart from each other are provided on the rotating shaft, and a rotating blade is formed between two adjacent rotating grooves.

4. The hydraulic control valve according to claim 3, characterized in that: The rotating shaft has a first end surface close to the valve core and a second end surface away from the valve core, and the direction in which the first end surface extends toward the second end surface is a first direction; The rotation groove opens at the outer wall of the rotation shaft and extends along the first direction to the second end surface, and along the first direction, the opening depth of the rotation groove gradually increases.

5. The hydraulic control valve according to claim 4, characterized in that: The rotation groove has an opening line whose length direction extends along the circumference of the rotation axis, and one end of the opening line has an arc segment extending to the second end surface, and the arc segment and the corresponding groove wall in the rotation groove form a guide surface.

6. The hydraulic control valve according to claim 5, characterized in that: The groove wall of the rotating groove also has a receiving surface arranged at a preset angle with the guide surface.

7. The hydraulic control valve according to claim 2, characterized in that: When in the open position, the first connecting cavity is arranged opposite to the paddle.

8. The hydraulic control valve according to claim 2, characterized in that: The hydraulic control valve also includes a control module, a detection module and an alarm that are communicatively connected to the control module. The detection module is arranged in the outer valve housing and is used to detect the measured oil pressure information in the second connecting chamber. The control module controls the activation of the alarm according to the measured oil pressure information.

9. A method for monitoring a hydraulic control valve, characterized in that: The steps include: Providing a hydraulic control valve as claimed in claim 8; The detection module detects the measured oil pressure information in the second connecting chamber, and transmits the measured oil pressure information to the control module; The control module draws a measured oil pressure fluctuation curve according to the measured oil pressure information, generates a control signal according to the measured oil pressure fluctuation curve and a preset reference fluctuation curve, and transmits the control signal to the alarm; The alarm is activated according to the received control signal.

10. A hydraulic operating mechanism, characterized in that: The hydraulic operating mechanism comprises a hydraulic control valve according to any one of claims 1 to 8.

Images