CN220396578U - Electric direct control type control valve of hydraulic support - Google Patents

Abstract

The utility model provides an electric direct control valve of a hydraulic support, which comprises a shell and a pulse signal receiver assembly, wherein a left main body hole and a right main body hole which are symmetrically arranged are formed in the shell, iron cores are respectively arranged at the inner tops of the left main body hole and the right main body hole, windings are wound on the iron cores, rotors are inserted into inner holes of the iron cores and the windings, hollow shafts are fixed in the rotors, central shafts are respectively arranged in the left main body hole and the right main body hole, and a first oil blind hole and a second oil blind hole are respectively formed in two sides of the shell; the first oil liquid blind hole or the second oil liquid blind hole can be communicated with the low-pressure liquid return hole through the corresponding upper oil port annular groove respectively, and the first oil liquid blind hole or the second oil liquid blind hole can be communicated with the high-pressure liquid inlet hole through the corresponding lower oil port annular groove respectively. The hydraulic cylinder action executed by the hydraulic support corresponds to the pulse signal according to the characteristics of the coal seam, and the position and the speed are accurately controlled and accurately adjusted by subdividing the pulse signal under the control of the pulse signal.

Description

Electric direct control type control valve of hydraulic support

Technical Field

The utility model relates to the technical field of control valves, in particular to an electric direct control type control valve of a hydraulic support.

Background

At present, the operation of the coal mine hydraulic support is mainly carried out in two modes, namely a direct manual control valve and an electrohydraulic pilot control valve group. The manual control valve is completed by manual operation, a complex control system is not needed, and an operator is used for manually moving the handle back and forth to control the reversing of the high-pressure emulsion during the working, so that an advanced control system is not needed for the manual operation. Therefore, the method is popularized and used in most coal mines for many years. The electrohydraulic pilot control valve group is composed of electrohydraulic valve as pilot valve and hydraulic control valve as main valve, and the system is composed of computer control system, displacement sensor and electrohydraulic pilot control valve. When the hydraulic support is in operation, the displacement sensor receives a state signal of the hydraulic support, a control signal is sent to the electrohydraulic pilot valve through the computer system, the pilot valve acts to control the main valve to act, and control of each hydraulic cylinder executing piece of the hydraulic support is realized, and the hydraulic support belongs to a secondary control mode. The electrohydraulic pilot control valve and the system thereof realize closed-loop control, improve the automation level of the hydraulic support and reduce the labor cost.

However, both manual operated valves and liquid pilot operated valve sets have significant drawbacks, and manual operated valves have significant several major drawbacks: (1) in the manual operation working process, the action and control of the hydraulic support are completely completed by manual observation and experience, and the control position is inaccurate; (2) the labor is wasted on the operation of the staff, and the labor efficiency is improved; (3) the manual work can only be realized on-site operation at the working site, and automatic remote control cannot be realized; (4) the manual control valve has complex structure, more parts and high production cost; (5) the overpressure safety protection of the emulsion control system is realized through a safety valve in the whole system, and the overpressure accurate safety protection cannot be realized for a certain hydraulic cylinder; (6) the manual control valve adopts a ball valve or a conical structure, so that automatic balance adjustment of internal pressure cannot be realized; (7) manual operation cannot realize accurate speed regulation, and misoperation is easy to occur; the manual control valve adopts a passive closing structure of a spring control valve core, and has hysteresis of valve port closing engineering.

The drawbacks of electrohydraulic pilot valves are mainly manifested in the following aspects: (1) the computer system has high cost in the use and maintenance processes, has high technical requirements on operators, is not suitable for small and medium coal mine enterprises, and is particularly limited in application to coal beds with complex geological conditions; (2) the pilot valve part of the electrohydraulic pilot control valve adopts a solenoid valve control mode, has a complex structure, involves more parts and has high production and processing cost; (3) the pilot control loop of the electro-hydraulic pilot control valve adopts a micro-hole structure for processing, has high processing precision requirement, particularly has high requirement on emulsion quality, needs to precisely filter the emulsion and has high production and use costs; (4) the main valve part of the electrohydraulic pilot control valve has complex structure, more parts and high matching requirement, belongs to precise processing and has high production cost; (5) the main valve part structure of the electrohydraulic pilot control valve adopts a passive closing structure of a spring control valve core, and has the hysteresis of valve port closing engineering; (6) the control mode of the pilot valve in the electrohydraulic pilot control valve bank to the main valve is a one-time in-place control mode, and the speed regulation control of the execution hydraulic cylinder according to different coalbed geological conditions cannot be realized; (7) the overpressure safety protection of the emulsion control system is realized through a safety valve in the main control system, the overpressure accurate safety protection cannot be realized for a certain hydraulic cylinder, and misoperation is easy to occur.

Based on the above factors, there is an urgent need for a control valve that overcomes the above drawbacks to meet the control requirements of hydraulic supports.

Disclosure of Invention

The utility model aims to provide an electric direct control type control valve of a hydraulic support, which realizes accurate position control and accurate speed adjustment by subdividing pulse signals, does not need to control the position by an electrohydraulic pilot-operated valve position sensor, simplifies the structural composition of the system and improves the accuracy of speed control.

According to one object of the utility model, the utility model provides an electric direct control valve of a hydraulic support, which comprises a shell and a pulse signal receiver assembly arranged at the upper part of the shell, wherein a left main body hole and a right main body hole which are symmetrically arranged are formed in the shell, iron cores are respectively arranged at the inner tops of the left main body hole and the right main body hole, windings are wound on the iron cores, rotors are inserted into inner holes of the iron cores and the windings, hollow shafts are fixed in the rotors, central shafts are respectively arranged in the left main body hole and the right main body hole, and the upper parts of the central shafts are in threaded fit with the hollow shafts;

the central shaft is provided with an upper oil port annular groove and a lower oil port annular groove at the middle lower part, a high-pressure liquid inlet hole and a low-pressure liquid return hole are processed at the lower part of the central position of the shell, and a first oil blind hole and a second oil blind hole which are symmetrically arranged are respectively arranged at two sides of the shell;

the first oil blind hole or the second oil blind hole can be communicated with the low-pressure liquid return hole through the corresponding upper oil through hole annular groove respectively, and the first oil blind hole or the second oil blind hole can be communicated with the high-pressure liquid inlet hole through the corresponding lower oil through hole annular groove respectively;

the pulse signal receiver assembly comprises a left pulse signal receiver arranged corresponding to the left main body hole and a right pulse signal receiver arranged corresponding to the right main body hole.

Further, the left main body hole and the right main body hole are provided with three-section stepped blind holes 4, the left main body hole and the right main body hole comprise a gland mounting hole, a winding mounting hole and a central shaft mounting hole from top to bottom, the inner wall of the gland mounting hole is provided with internal threads, the gland mounting holes are provided with glands, and the glands are arranged in the gland mounting hole and are connected with the shell through threads; the winding mounting holes are internally provided with iron cores, and the windings are wound on the iron cores.

Further, the center shaft is of a cylindrical structure, the center shaft comprises a left center shaft and a right center shaft, the left center shaft is arranged in the left main body hole, and the right center shaft is arranged in the right main body hole.

Further, an inner thread is arranged on the inner wall of the hollow shaft, bearings are respectively arranged on the upper part and the lower part of the hollow shaft, and an outer thread matched with the inner thread of the hollow shaft is arranged on the outer wall of the upper part of the central shaft.

Further, after the central shaft is screwed with the hollow shaft, an upper stroke working cavity is reserved at the top of the central shaft, the bottoms of the left main body hole and the right main body hole are blind hole bottoms, and the bottoms of the left main body hole and the right main body hole and the central shaft are slidably mounted to form a lower stroke working cavity.

Further, an inner damping micro hole is formed in the middle lower portion of the central shaft, and a damping guide hole is formed in the radial direction of the end portion of the inner damping micro hole; the central shaft is also provided with an upper bit combined sealing annular groove, a middle bit combined sealing annular groove and a lower bit combined sealing annular groove.

Further, the diameter of the first oil blind hole is smaller than that of the second oil blind hole, and the diameter of the high-pressure liquid inlet hole is smaller than that of the first oil blind hole and that of the second oil blind hole.

Further, the housing above the first oil blind hole and the second oil blind hole is respectively provided with an ultrahigh pressure protection assembly mounting hole for assembling an ultrahigh pressure protection assembly, and the ultrahigh pressure protection assembly comprises a conical pressure control core, an ultrahigh pressure protection spring and a combined sealing piece nut.

Further, a first overpressure protection oil duct and a second overpressure protection oil duct are also arranged in the shell, and the first oil liquid blind hole is communicated with the low-pressure liquid return hole through the first overpressure protection oil duct; the second oil liquid blind hole is communicated with the low-pressure liquid return hole through the second overpressure protection oil duct.

Further, a left internal leakage flow dividing groove and a right internal leakage flow dividing groove are further processed in the shell, the bottom of the left internal leakage flow dividing groove or the bottom of the right internal leakage flow dividing groove is respectively communicated with the lower stroke working cavity, and the other end of the left internal leakage flow dividing groove or the other end of the right internal leakage flow dividing groove is respectively communicated with the low-pressure liquid return hole.

The technical scheme of the utility model has simple structure, does not need a valve core, and directly controls the opening and closing of the hydraulic oil port through the screw rod structure; the hydraulic support executes the hydraulic cylinder action and corresponds to the pulse signal according to the characteristics of the coal seam, the pulse signal is used for controlling, the accurate control of the position and the accurate adjustment of the speed are realized through subdivision of the pulse signal, the human factors that the position and the speed of a manual operation valve which is widely used at present are controlled by manual experience are avoided, the position is not required to be controlled by an electrohydraulic pilot operation valve position sensor, the system structure is simplified, and meanwhile, the accuracy of speed control is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic view of a housing according to an embodiment of the present utility model;

FIG. 3 is a side view of the embodiment C of the present utility model;

FIG. 4 is a side view of the embodiment D of the present utility model;

fig. 5 is a side view of the embodiment E of the present utility model.

In the figure, 1, a shell; 2. a left body hole 2; 201. a gland mounting hole; 202. winding mounting holes; 203. a central shaft mounting hole; 3. a gland; 4. a right body aperture; 5. a left winding; 6. a right winding; 7. a hollow shaft; 8. a bearing; 9. a left central axis; 10. a right central axis;

11. a left upper stroke working chamber; 12. a right upper stroke working chamber; 13. a left lower stroke working chamber; 14. a right lower stroke working chamber; 15. an upper oil port annular groove; 16. a lower oil port annular groove; 17. the upper bit assembly seals the annular groove; 18. the middle position combination seals the annular groove; 19. the lower assembly seals the annular groove;

20. an internal damping micro-hole; 21. high-pressure liquid inlet holes; 22. a low-pressure liquid return hole; 23. the first oil liquid blind hole; 24. the second oil liquid blind hole; 25. an ultra-high pressure protection component mounting hole; 26. an overpressure protection oil duct; 27. an internal leakage shunt tank; 28. a pulse signal receiver.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1

As shown in figures 1-5 of the drawings,

an electric direct control type control valve of a hydraulic support comprises a shell 1, a pulse signal receiver component arranged on the upper part of the shell 1 and an electric mechanism component arranged in the shell 1.

The housing 1 is a body member of a symmetrical structure, and the interior of the housing 1 is machined to form inner and outer tunnels for mounting the various components. Specifically, two main body holes are formed in the shell 1, the main body holes are divided into a left main body hole 2 and a right main body hole 4, the main body holes are three-section stepped blind holes, and the main body holes comprise a gland mounting hole 201, a winding mounting hole 202 and a central shaft mounting hole 203 from top to bottom.

An internal thread is arranged on the inner wall of the gland mounting hole 201, each gland mounting hole 201 is provided with a gland 3, and the gland 3 is arranged in the gland mounting hole 201 and is connected with the shell 1 through the thread.

Each winding mounting hole 202 is internally provided with an iron core, a winding is wound on the iron core, specifically, the left main body hole 2 is internally provided with a left winding 5, the right main body hole 4 is internally provided with a right winding 6, and the iron core is tightly matched with the winding mounting holes 202.

The rotor is inserted in the inner holes of the iron core and the winding, a hollow shaft 7 is fixed in the rotor, internal threads are arranged on the inner wall of the hollow shaft 7, and bearings 8 are respectively arranged at the upper part and the lower part of the hollow shaft 7.

The center pin is cylindrical structure, and the center pin includes left center pin 9 and right center pin 10, and left center pin 9 sets up in left main part hole 2, and right center pin 10 sets up in right main part hole 4. An external thread matched with the internal thread of the hollow shaft 7 is arranged on the outer wall of the upper part of the central shaft, the central shaft can be connected in the hollow shaft 7 in a threaded manner, and an upper stroke working cavity is reserved at the top of the central shaft after the central shaft is in threaded engagement with the hollow shaft 7; the middle lower part of the central shaft is of a smooth cylindrical structure, the middle lower part of the central shaft is slidably arranged in the main body hole, the lower part of the main body hole is a blind hole bottom, the bottom of the main body hole and the central shaft are slidably arranged to form a lower stroke working cavity, and the upper stroke working cavity corresponds to the lower stroke working cavity in position and size. Specifically, the lower stroke working chamber is divided into a left lower stroke working chamber 13 and a right lower stroke working chamber 14, and the upper stroke working chamber is divided into a left upper stroke working chamber 11 and a right upper stroke working chamber 12.

An upper oil through hole annular groove 15 and a lower oil through hole annular groove 16 are formed in the outer circumferential direction of the cylindrical structure of the outer light surface of the middle lower part of the central shaft, an upper combined sealing annular groove 17, a middle combined sealing annular groove 18 and a lower combined sealing annular groove 19 are further arranged on the central shaft, and sealing rings are arranged in the upper combined sealing annular groove 17, the middle combined sealing annular groove 18 and the lower combined sealing annular groove 19. Specifically, the left central shaft 9 is provided with a left upper oil port annular groove and a left lower oil port annular groove, and the right central shaft 10 is provided with a right upper oil port annular groove and a right lower oil port annular groove. The left lower oil through hole annular groove and the right lower oil through hole annular groove are respectively provided with a through hole penetrating through the central shaft.

The middle lower part of the central shaft is provided with an inner damping micro hole 20, a damping guide hole is processed in the radial direction of the end part of the inner damping micro hole 20, a trapezoid hole is processed at the upper part of the inner damping micro hole 20, and the trapezoid hole is used for balancing the axial thrust to the central shaft generated by a high-pressure hole at the lower part of the central shaft.

The lower part of the central position of the shell 1 is provided with a high-pressure liquid inlet hole 21 and a low-pressure liquid return hole 22, the diameters of the high-pressure liquid inlet hole 21 and the low-pressure liquid return hole 22 meet the design requirements of fluid flow rules and hydraulic support action performance, and the diameter of the low-pressure liquid return hole 17 is large.

The both sides of casing 1 are equipped with the first fluid blind hole 23 and the second fluid blind hole 24 that the symmetry set up respectively, and the diameter of first fluid blind hole 23 is less than the diameter of second fluid blind hole 24, and the diameter of high-pressure feed liquor hole 21 is less than the diameter of first fluid blind hole 23 and second fluid blind hole 24.

The side surfaces of the shell above the first oil blind hole 23 and the second oil blind hole 24 are respectively provided with an ultrahigh pressure protection component mounting hole 25, and an ultrahigh pressure protection component is arranged in the ultrahigh pressure protection component mounting hole 25 and comprises a conical pressure control core, an ultrahigh pressure protection spring and a combined sealing piece nut.

The casing 1 is also internally provided with an overpressure protection oil duct 26, the overpressure protection oil duct 26 comprises a first overpressure protection oil duct and a second overpressure protection oil duct which are symmetrically arranged, and the first oil blind hole 23 is communicated with the low-pressure liquid return hole 22 through the first overpressure protection oil duct; the second oil blind hole 24 is communicated with the low-pressure liquid return 17 hole through a second overpressure protection oil duct.

An inner leakage flow dividing groove 27 is further processed in the shell 1, the inner leakage flow dividing groove 27 comprises a left inner leakage flow dividing groove and a right inner leakage flow dividing groove, the bottom of the left inner leakage flow dividing groove is communicated with the left lower stroke working cavity 1101, and the other end of the left inner leakage flow dividing groove is communicated with the low-pressure liquid return hole 22. The bottom of the right internal leakage shunt groove is communicated with the right lower stroke working chamber 1102, and the other end of the right internal leakage shunt groove is communicated with the low-pressure liquid return hole 22.

The diameter of the hole meets the design requirements of fluid flow rules and ultrahigh pressure action sensitivity, and the diameter of a pipeline of the overpressure protection oil duct at the front end part of the ultrahigh pressure protection assembly is smaller than that of a pipeline at the rear side part of the ultrahigh pressure protection assembly.

The pulse signal receiver 28 mounted on the upper portion of the housing 1 is fixed on the upper portion of the housing 1 by a connection bolt, and specifically, the pulse signal receiver 28 includes a left pulse signal receiver provided corresponding to the left body hole 2 and a right pulse signal receiver provided corresponding to the right body hole 4. The pulse signal receiver 28 is connected with an external power supply, the signal of the pulse signal receiver 28 is connected with the winding, and the energization condition of the winding is controlled through the signal of the pulse signal receiver, so that the magnetic field change of the iron core and the winding is controlled.

When in use, the utility model comprises the following five working states:

(1) The signal system does not send signals to the pulse signal receiver, and the windings are not electrified

When the left winding and the right winding 6 are not electrified 401, the left central shaft 9 and the right central shaft 10 are in initial installation positions, the first oil blind hole 23 is communicated with the low-pressure liquid return hole 22 through the left upper oil hole annular groove 1001, the second oil blind hole 24 is communicated with the low-pressure liquid return hole 22 through the right upper oil hole annular groove 1002, no action pressure is generated when the hydraulic cylinder is executed on the hydraulic support, and meanwhile, the high-pressure oil inlet is closed.

(2) The signal system sends out signals to the left pulse signal receiver, the left winding 5 is powered positively, and the right winding 6 is not powered

The left winding 5 drives the rotor to rotate forward, the hollow shaft 7 is driven to rotate forward, the left central shaft 9 moves upwards (the moving speed and the moving position are determined by pulse signal fraction values), the connection between the first oil blind hole 23 and the upper left oil through hole annular groove 1001 is closed, and the connection between the first oil blind hole 23 and the low-pressure liquid return hole 22 is cut off; the connection between the first oil blind hole 23 and the left lower oil through hole annular groove 1101 is opened, and the connection between the first oil blind hole 23 and the high-pressure liquid inlet 21 is realized; the first oil liquid blind hole 23 is connected with a working cavity of the hydraulic support executing hydraulic cylinder, and when the working resistance of the working cavity of the hydraulic support executing hydraulic cylinder exceeds the set value of the ultrahigh pressure protection assembly, the hydraulic pressure generated by the working resistance is connected with the low pressure oil hole 17 through the first liquid return blind hole 18 and the first overpressure protection oil duct, so that ultrahigh pressure protection is realized.

(3) The signal system sends out signals to the right pulse signal receiver, the right winding 6 is powered positively, and the left winding 5 is not powered

The right winding 6 drives the rotor to rotate forward, the hollow shaft 7 is driven to rotate forward, the right central shaft 10 moves upwards (the moving speed and the position are determined by pulse signal fraction values), the connection between the second oil blind hole 24 and the upper right oil through hole annular groove 1002 is closed, the connection between the second oil blind hole 24 and the low-pressure liquid return hole 22 is cut off, the connection between the second oil blind hole 24 and the lower right oil through hole annular groove 1102 is opened, and the connection between the second oil blind hole 24 and the high-pressure liquid inlet hole 21 is realized; the second oil liquid blind hole 24 is connected with a working cavity of the hydraulic support executing hydraulic cylinder, and when the working resistance of the working cavity of the hydraulic support executing hydraulic cylinder exceeds the set value of the ultrahigh pressure protection assembly, the hydraulic pressure generated by the working resistance is connected with the low pressure oil hole 17 through the second liquid return blind hole 19 and the second overpressure protection oil duct to realize ultrahigh pressure protection.

(4) The signal system sends out signals to the left pulse signal receiver, the left winding 5 is reversely electrified, and the right winding 6 is not electrified

The left winding 5 drives the rotor to reversely rotate, the hollow shaft 7 is driven to reversely rotate, the left central shaft 9 moves downwards (the moving speed and the position are determined by the pulse signal fine value), the connection between the first oil blind hole 23 and the upper left oil through hole annular groove 1001 is opened, the connection between the first oil blind hole 23 and the low-pressure liquid return hole 22 is closed, the connection between the first oil blind hole 23 and the lower left oil through hole annular groove 1101 is closed, and the connection between the first oil blind hole 23 and the high-pressure liquid inlet hole 21 is closed.

(5) The signal system sends out signals to the right pulse signal receiver, the right winding 6 is reversely electrified, and the left winding 5 is not electrified

The right winding 6 drives the rotor to reversely rotate, the hollow shaft 7 is driven to reversely rotate, the right central shaft 10 moves downwards (the moving speed and the position are determined by the pulse signal fine value), the connection between the second oil blind hole 24 and the upper right oil through hole annular groove 1002 is opened, the connection between the second oil blind hole 24 and the low-pressure liquid return hole 22 is closed, the connection between the second oil blind hole 24 and the lower right oil through hole annular groove 1102 is closed, and the connection between the second oil blind hole 24 and the high-pressure liquid inlet hole 21 is closed.

The electric actuating mechanism receives the pulse control signals transmitted by the control system to generate rotary motion, a plurality of position sensors are not needed, the complexity of the system caused by the fact that the electro-hydraulic pilot control system adopts the plurality of position sensors is avoided, and the running cost and the complexity of the system are reduced; the hydraulic support executes the hydraulic cylinder action and corresponds to the pulse signals according to the characteristics of the coal seam, the pulse signals are used for controlling, the accurate control of the position and the accurate adjustment of the speed are realized by subdividing the pulse signals, the human factors that the manual operation valve widely used at present controls the position and the speed by manual experience are avoided, the position control by an electrohydraulic pilot operation valve position sensor is not needed, the system structure composition is simplified, and the accuracy of speed control is improved; the control signal receiving can directly control the liquid control valve through remote control or computer software, so that disposable control is realized, a secondary control mode of the electrohydraulic pilot control valve group is avoided, and the system structure is simplified;

the utility model adopts widely used common hydraulic support emulsion, does not need to carry out precise filtration on the emulsion, reduces the running and maintenance cost of the system, and particularly reduces the failure rate of the system; the utility model has simple structure, no need of valve core, direct control of opening and closing of the hydraulic oil port by the screw structure, less number of parts, relatively simple production and processing technique and low cost; the spring reset control is not needed, so that the hysteresis phenomenon of closing the valve port by the spring is avoided, and the sensitivity and reliability of the action are improved; the independent overpressure protection component is arranged, so that the independent overpressure protection control of the hydraulic cylinder is implemented for a single hydraulic support, and the possibility of interference misoperation caused by the comprehensive arrangement of the safety valve in the system of the electrohydraulic pilot operated valve is reduced; the inner leakage diversion trench is reasonably designed, so that the action hysteresis phenomenon of an oil liquid channel caused by the fact that the inner leakage forms over-pressure work is avoided, and the reliability of executing the action control of the hydraulic cylinder on the hydraulic support is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. The electric direct control type control valve for the hydraulic support is characterized by comprising a shell and a pulse signal receiver assembly arranged at the upper part of the shell, wherein a left main body hole and a right main body hole which are symmetrically arranged are formed in the shell, iron cores are respectively arranged at the inner tops of the left main body hole and the right main body hole, windings are wound on the iron cores, rotors are inserted into inner holes of the iron cores and the windings, hollow shafts are fixed in the rotors, central shafts are respectively arranged in the left main body hole and the right main body hole, and the upper parts of the central shafts are in threaded fit with the hollow shafts;

the middle lower part of the central shaft is provided with an upper oil port annular groove and a lower oil port annular groove, the lower part of the central position of the shell is provided with a high-pressure liquid inlet hole and a low-pressure liquid return hole, and the two sides of the shell are respectively provided with a first oil blind hole and a second oil blind hole which are symmetrically arranged;

the first oil blind hole or the second oil blind hole can be communicated with the low-pressure liquid return hole through the corresponding upper oil through hole annular groove respectively, and the first oil blind hole or the second oil blind hole can be communicated with the high-pressure liquid inlet hole through the corresponding lower oil through hole annular groove respectively;

the pulse signal receiver assembly comprises a left pulse signal receiver arranged corresponding to the left main body hole and a right pulse signal receiver arranged corresponding to the right main body hole.

2. The hydraulic support electric direct control type control valve according to claim 1, wherein the left main body hole and the right main body hole are three-section stepped blind holes, the left main body hole and the right main body hole comprise a gland mounting hole, a winding mounting hole and a central shaft mounting hole from top to bottom, internal threads are arranged on the inner wall of the gland mounting hole, glands are arranged in the gland mounting hole, and the glands are arranged in the gland mounting hole and connected with the shell through threads; the winding mounting holes are internally provided with iron cores, and the windings are wound on the iron cores.

3. The hydraulic mount electric direct control valve according to claim 1, wherein the central shaft is of a cylindrical structure, the central shaft includes a left central shaft and a right central shaft, the left central shaft is disposed in the left main body hole, and the right central shaft is disposed in the right main body hole.

4. The hydraulic support electric direct control type control valve according to claim 1, wherein internal threads are arranged on the inner wall of the hollow shaft, bearings are respectively arranged on the upper portion and the lower portion of the hollow shaft, and external threads matched with the internal threads of the hollow shaft are arranged on the outer wall of the upper portion of the central shaft.

5. The hydraulic support electric direct control valve according to claim 1, wherein an upper stroke working cavity is reserved at the top of the central shaft after the central shaft is screwed with the hollow shaft, blind hole bottoms are arranged at the lower parts of the left main body hole and the right main body hole, and a lower stroke working cavity is formed after the bottoms of the left main body hole and the right main body hole are slipped with the central shaft.

6. The hydraulic support electric direct control type control valve according to claim 1, wherein an inner damping micro hole is formed in the middle lower portion of the central shaft, and a damping guide hole is formed in the radial direction of the end portion of the inner damping micro hole; the central shaft is also provided with an upper bit combined sealing annular groove, a middle bit combined sealing annular groove and a lower bit combined sealing annular groove.

7. The hydraulic bracket electric direct control type control valve according to claim 1, wherein the diameter of the first oil blind hole is smaller than the diameter of the second oil blind hole, and the diameter of the high-pressure liquid inlet hole is smaller than the diameters of the first oil blind hole and the second oil blind hole.

8. The hydraulic bracket electric direct control type control valve according to claim 1, wherein the housing above the first oil blind hole and the second oil blind hole is respectively provided with an ultrahigh pressure protection component mounting hole for assembling an ultrahigh pressure protection component, and the ultrahigh pressure protection component comprises a conical pressure control core, an ultrahigh pressure protection spring and a combined sealing member nut.

9. The hydraulic support electric direct control type control valve according to claim 1, wherein a first overpressure protection oil duct and a second overpressure protection oil duct are further arranged in the shell, and the first oil blind hole is communicated with the low-pressure liquid return hole through the first overpressure protection oil duct; the second oil liquid blind hole is communicated with the low-pressure liquid return hole through the second overpressure protection oil duct.

10. The hydraulic bracket electric direct control valve according to claim 5, wherein a left internal leakage shunt groove and a right internal leakage shunt groove are further processed in the housing, the bottom of the left internal leakage shunt groove or the bottom of the right internal leakage shunt groove is respectively communicated with the lower stroke working cavity, and the other end of the left internal leakage shunt groove or the other end of the right internal leakage shunt groove is respectively communicated with the low pressure liquid return hole.