阅读说明：本技术 一种高压闸阀手自一体执行机构 (Manual-automatic integrated executing mechanism of high-pressure gate valve ) 是由 谢冲 汪林 王国荣 赵建国 于 2021-07-06 设计创作，主要内容包括：本发明公开了一种高压闸阀手自一体执行机构,涉及油田井控作业中的控制技术领域,机构主要包括电机、减速机构、扭矩限制器、显示杆机构和手轮离合装置,在正常情况下通过控制电机带动减速机构使闸阀开启与关闭,减速机构及扭矩限制器作为整个机构稳定运行的保障。在正常及紧急情况下,通过手轮离合装置快速切换及控制闸阀的开启与关闭。其中显示杆机构可判断闸阀开关位置。本发明解决了现有闸阀远程自动开关装置中存在的不具备手自一体操作、无法实现手动和自动切换简单快捷且有保障、缺乏过载障碍保护功能及能够配合电机及闸阀的机械电子一体式显示杆机构。(The invention discloses a manual-automatic integrated executing mechanism of a high-pressure gate valve, which relates to the technical field of control in oil field well control operation. Under normal and emergency conditions, the opening and closing of the gate valve are quickly switched and controlled through the hand wheel clutch device. Wherein the display rod mechanism can judge the opening and closing position of the gate valve. The invention solves the problems that the existing gate valve remote automatic opening and closing device does not have manual-automatic integrated operation, can not realize manual and automatic switching, is simple and quick, has guarantee, lacks overload obstacle protection function and can be matched with a motor and a gate valve.)

1. A manual-automatic integrated actuating mechanism of a high-pressure gate valve is characterized by comprising a motor shell (1), a stator core (2), a rotor (3), a speed reducing mechanism (4), a display rod mechanism (6), a motor end cover (9), a motor rear end cover (10), a hand wheel clutch device (14) and a valve connecting cylinder (11); the motor shell (1) is fixedly connected with a motor end cover (9) and a motor rear end cover (10) respectively by adopting inner hexagonal cylindrical head screws (12); the stator iron core (2) is fixedly connected with the motor shell (1); the rotor (3) is fixedly connected with an input shaft (201) of the speed reducing mechanism (4); the speed reducing mechanism (4) is a two-stage planetary gear speed reducer and comprises an input shaft (201), a torque limiter (5), an internal gear B1 (202), a sun gear A1 (203), a planetary gear C1 (204), a rotating arm 1 (205), an internal gear B2 (206), a sun gear A2 (207), a planetary gear C2 (208), a rotating arm 2 (209), an output shaft (210) and a deep groove ball bearing (211); the central gear A1 (203) is connected with the input shaft (201) into a whole in a gear shaft mode; the internal gear B1 (202) and the internal gear B2 (206) are fixedly connected with the speed reducing mechanism shell (212) by fastening screws; the planet gear C1 (204) is meshed with the internal gear B1 (202) and the sun gear A1 (203) respectively; the planet gear C1 (204) is connected with the sun gear A2 (207) through matching with the rotating arm 1 (205); the planet gear C2 (208) is meshed with the internal gear B2 (206) and the sun gear A2 (207), respectively; the input shaft is connected with an output shaft (210) through matching with a rotating arm 2 (209); the deep groove ball bearing (211) is arranged on the input shaft (201), and the upper part of the deep groove ball bearing is connected with the torque limiter (5); the speed reducing mechanism (4) is provided with mounting holes 1 (7) and mounting holes 2 (8); the display rod mechanism (6) and the hand wheel clutch device (14) are respectively arranged in a mounting hole 1 (7) and a mounting hole 2 (8) on the shell of the speed reducing mechanism (4); the valve connecting cylinder (11) is fixedly connected with the bottom end of the speed reducing mechanism (4) by adopting a hexagonal head bolt (13); the torque limiter (5) is arranged in the motor shell (1) and connected with the rotor (3); the speed reducing mechanism (4) is connected with a rear end cover (10) of the motor.

2. The manual-automatic actuator of high-pressure gate valve according to claim 1, wherein the hand wheel clutch device (14) comprises two design modes; the first design mode is as follows: the hand wheel clutch device (14) consists of a hand wheel (407), a hydraulic pump (404), a hydraulic piston rod (403), a straight bevel gear 2 (402), an electromagnetic reversing valve (405), a handle shaft (406) and a straight bevel gear 1 (401), and is assembled on a mounting hole 1 (7) of the speed reducing mechanism (4); the hydraulic piston rod (403) is fixedly connected with the handle shaft (406) and the straight bevel gear 2 (402); the hydraulic pump (404) is connected with a hydraulic piston rod (403) through an electromagnetic directional valve (405); when the hydraulic piston rod (402) advances, the straight-tooth conical gear 2 (402) is meshed with the straight-tooth conical gear 1 (401).

3. The manual-automatic actuator of high-pressure gate valve according to claim 1 or 2, characterized in that the hand wheel clutch device (14) is designed in a second way: the hand wheel clutch device (14) consists of a hand wheel (501), a hand wheel end cover (502), a hand wheel clutch shell (503), a rocker dustproof cap (504), a rocker (505), a spring (506), a handle (507), a full-thread hexagon head bolt (508), a handle driving block (509), a reversing sliding block (510), a conical gear (511), a reversing block support (512) and a circumferential fixing pin (513), and is assembled on the mounting hole 2 (8) of the speed reducing mechanism (4); hand wheel (501) and handle drive piece (509) fixed connection, switching-over slider (510) and switching-over piece support (512) sliding connection, switching-over piece support (512) and rocker (505) fixed connection, circumference fixed pin (513) are installed on rocker (505) pinhole.

4. The manual-automatic execution mechanism of the high-pressure gate valve according to claim 2, wherein the electromagnetic directional valve (405) is a two-position four-way electromagnetic directional valve with an emergency handle, and can be quickly switched to manual operation in case of power failure.

5. The manual-automatic actuator of high-pressure gate valve according to claim 1, the display rod mechanism (6) consists of an elastic retainer ring (301) for a shaft, a display shaft (302), a displacement sensor (303), a deep groove ball bearing 6200 (304), a bearing seat (305), a sleeve (306) and a wire rod buoy (307) with a magnetic ring, and is assembled on the mounting holes 1 and 7 of the speed reducing mechanism shell (212), the bearing seat (305) is connected with the speed reducing mechanism (4) through an inner hexagonal socket head cap screw (12), the sleeve (306) is connected with the mounting hole 1 (7) of the speed reducing mechanism (4) through threads, the display shaft (302) is connected with the sleeve (306) through threads, the lead screw buoy (307) with the magnetic ring is connected with the display shaft (302) through threads, the wire rod buoy (307) with the magnetic ring is matched with the magnetic ring of the displacement sensor (303) to monitor and display displacement data of the shaft (302).

6. The manual-automatic execution mechanism of the high-pressure gate valve according to claim 4, characterized in that the displacement sensor (303) is installed on the display rod mechanism (6) and is fixedly matched with the bearing seat (305), and the displacement data of the display shaft (302) is fed back to the remote control end in real time according to the movement condition of the display shaft (302) passing through the displacement sensor (303), and the displacement sensor (303) is a magnetic telescopic displacement sensor.

7. The manual-automatic actuator of a high-pressure gate valve according to claim 1, wherein the speed reducing mechanism housing (212) is provided with a mounting hole 1 (7) and a mounting hole 2 (8) at the same horizontal position, and the speed reducing mechanism housing (212) is provided with a threaded hole (601).

Technical Field

The invention relates to the technical field of control in oil field well control operation, in particular to a manual-automatic integrated actuating mechanism of a high-pressure gate valve.

Background

Well control is an extremely important link in the exploration and development process of petroleum and natural gas, and is also a precondition and guarantee for the safe production of petroleum and natural gas. The pressure in the well is kept balanced with the pressure of the stratum during field operation, and overflow is prevented. Meanwhile, when blowout or kick accidents are caused by various reasons, emergency rescue can be carried out in time. Well control operation needs to be shut in and kill the well by equipment such as a throttling kill manifold and the like. Kill manifolds, choke manifolds are essential devices for controlling flooding, blowout, emergency for blowout. The flat gate valve is one of key devices of a kill manifold and a choke manifold, and plays an important role in opening, closing and switching a flow channel in operation. However, the manual operation is mainly used for the on-site flat valve, so that the opening torque of the manual flat valve is large, and the manual operation is difficult; the number of the choke manifold flat gate valves is large, and time is consumed for processing emergency; misoperation is easy to occur, and well control safety is seriously affected; the remote control cannot be realized, the emergency switch function is lacked, and the like. Through the improvement to the flat valve is automatic, can not only effectual technical problem more than solving, improve the security and the guarantee nature of well control operation, can also play key effect to promoting the comprehensive automation of whole well control operation.

At present, the automation of the flat valve still stays in the initial exploration stage, and a plurality of problems still exist in many aspects. Chinese patent application publication No. CN211398627U discloses a novel oil gas well flat valve opening device, the device includes electronic opening device, this electronic opening device specifically has motor, reducing gear box, control switch, transmission structure, connects external member and supplementary hand wheel, drives transmission structure through the motor and rotates, through reducing gear box deceleration increase moment, realizes that the transmission shaft is rotatory, and the transmission shaft adopts the lead screw to drive the ascending or decline of flat valve disk seat and makes the valve gap open or close. The utility model discloses a whole device structure, connected mode are complicated, lead to design development debugging cycle length, cost high and remain to manual operation automatic operation switches the difficulty, lack the device of fast switch-over manual operation under outage or the emergency, and whole electric gate valve device lacks emergent ability, leads to whole wafer valve opening device's security and stability to obtain effective guarantee, and the convenience has also received the limitation. The safety and stability of the whole electric gate valve are one of the key indexes for judging whether the whole device is beneficial to production and use.

Chinese patent application publication No. CN210859857U discloses a high temperature and high pressure electric gate valve, and this utility model discloses an install the controller, the function of each device of program command control gate valve that the accessible controller set for through installing the cylinder, telescopic link and flashboard, accessible cylinder drive the telescopic link highly carry out lifting control to the flashboard to realize opening and closing of flashboard. The utility model discloses a whole device structure, connected mode are complicated, lack manually operation's emergency device, and adopt the cylinder, and its sealing performance can't be ensured, in case gas leakage will cause accident and harm.

Chinese patent application publication No. CN212338225U discloses an electric gate valve, and this utility model realizes the autonomous failure detection and emergency switch function of electric gate valve through the mutual cooperation of pressure sensor, electric cabinet, alarm lamp and rotation seat, but lacks the ability of self-stop when the overload fault happens to the gate valve motor when there is no operating personnel around.

Chinese patent application publication No. CN203770691U discloses a manual formula slab valve of gate valve open-close state device is shown in area, and this display device installs on the valve gap, has increased the diameter of slip cap and the diameter on valve gap upper portion for whole device volume grow, the difficulty of mutually supporting causes the cost to improve, and this kind of display device can't cooperate with motor drive simultaneously, only is applicable to manual formula slab valve, can't be adapted to the automatic trend of gate valve.

Chinese patent application publication No. CN201420142545.1 discloses a manual formula slab valve of area display gate open-close state device, this reality device is installed on the valve gap, has increased the diameter of slip cap and the diameter on valve gap upper portion for whole device volume grow, the difficulty of mutually supporting causes the cost to improve, and this kind of display device can't cooperate with motor drive simultaneously, only is applicable to manual formula slab valve, can't be adapted to the automatic trend of gate valve.

In summary, the prior art has major drawbacks in structure, connection, emergency capability, overload fault protection capability, and gate valve switch position display function. Therefore, it is necessary to provide a manual-automatic integrated execution mechanism for a high-pressure gate valve, which can be operated manually and automatically, can realize simple, quick and secure manual and automatic switching, has an overload fault protection function, and can be matched with a mechanical-electronic integrated display rod mechanism of a motor and the gate valve, so that the automation of a manifold flat valve is more perfect.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a manual-automatic integrated executing mechanism of a high-pressure gate valve. Under normal and emergency conditions, the opening and closing of the gate valve are quickly switched and controlled through the hand wheel clutch device. Wherein the display rod mechanism can judge the opening and closing position of the gate valve. The problems that manual and automatic operation is not available, manual and automatic switching can not be achieved, the operation is simple and fast, the safety is guaranteed, the overload obstacle protection function is lacked, and a mechanical and electronic integrated display rod mechanism capable of being matched with a motor and a gate valve is not available in an existing gate valve remote automatic opening and closing device are solved.

The purpose of the invention is realized by the following technical scheme:

a manual-automatic integrated actuating mechanism of a high-pressure gate valve comprises a motor shell, a stator core, a rotor, a speed reducing mechanism, a display rod mechanism, a motor end cover, a motor rear end cover, a hand wheel clutch device and a valve connecting cylinder; the motor shell is fixedly connected with a motor end cover and a motor rear end cover respectively by adopting inner hexagonal cylindrical head screws; the stator iron core is fixedly connected with the motor shell; the rotor is fixedly connected with an input shaft of the speed reducing mechanism; the speed reducing mechanism is a two-stage planetary gear speed reducer and comprises an input shaft, a torque limiter, an internal gear B1, a sun gear A1, a planetary gear C1, a rotating arm 1, an internal gear B2, a sun gear A2, a planetary gear C2, a rotating arm 2, an output shaft and a deep groove ball bearing; the central gear A1 is connected with the input shaft into a whole in a gear shaft form; the internal gear B1 and the internal gear B2 are fixedly connected with the speed reducing mechanism shell by fastening screws; the planet gear C1 is meshed with an internal gear B1 and a sun gear A1 respectively; the planet gear C1 is connected with a sun gear A2 (207) through matching with the rotating arm 1; the planet gear C2 is meshed with an internal gear B2 and a sun gear A2 respectively; the input shaft is connected with the output shaft through being matched with the rotating arm 2; the deep groove ball bearing is arranged on the input shaft, and the upper part of the deep groove ball bearing is connected with the torque limiter; the speed reducing mechanism is provided with a mounting hole 1 and a mounting hole 2; the display rod mechanism and the hand wheel clutch device are respectively arranged in a mounting hole 1 and a mounting hole 2 on the shell of the speed reducing mechanism; the valve connecting cylinder is fixedly connected with the bottom end of the speed reducing mechanism by adopting a hexagonal head bolt; the torque limiter is arranged in the motor shell and connected with the rotor; the speed reducing mechanism is connected with the rear end cover of the motor.

Further, the hand wheel clutch device has two design modes:

the first method is as follows: the hand wheel clutch device consists of a hand wheel, a hydraulic pump, a hydraulic piston rod, a straight-tooth conical gear 2, an electromagnetic reversing valve, a handle shaft and a straight-tooth conical gear 1 and is assembled on the mounting hole 1 of the speed reducing mechanism; the hydraulic piston rod is fixedly connected with the handle shaft and the straight bevel gear 2; the hydraulic pump is connected with a hydraulic piston rod through an electromagnetic directional valve; when the hydraulic piston rod is pushed forward, the straight-tooth bevel gear 2 is embedded with the straight-tooth bevel gear 1.

The second method comprises the following steps: the hand wheel clutch device consists of a hand wheel, a hand wheel end cover, a hand wheel clutch shell, a rocker dustproof cap, a rocker, a spring, a handle, a full-thread hexagon head bolt, a handle driving block, a reversing slide block, a conical gear, a reversing block support and a circumferential fixing pin, and is assembled on the mounting hole 2 of the speed reducing mechanism; the hand wheel is fixedly connected with the handle driving block, the reversing sliding block is connected with the reversing block in a supporting and sliding mode, the reversing block is connected with the rocker fixedly, and the circumferential fixing pins are installed on the rocker pin holes.

Furthermore, the electromagnetic directional valve is a two-position four-way electromagnetic directional valve with an emergency handle, and can be quickly switched to manual operation under the condition of power failure.

Furthermore, the display rod mechanism is composed of an elastic check ring for a shaft, a display shaft, a displacement sensor, a deep groove ball bearing 6200, a bearing seat, a sleeve and a lead screw buoy with a magnetic ring, and is assembled on the mounting hole 1 of the speed reducing mechanism shell, the bearing seat is connected with the speed reducing mechanism through an inner hexagonal cylinder head screw, the sleeve is connected with the mounting hole 1 of the speed reducing mechanism through a thread, the display shaft is connected with the sleeve through a thread, the lead screw buoy with the magnetic ring is connected with the display shaft through a thread, and the lead screw buoy with the magnetic ring is matched with the magnetic ring of the displacement sensor to monitor displacement data of the display shaft.

Furthermore, the displacement sensor is arranged on the display rod mechanism and is fixedly matched with the bearing seat, and the displacement data of the display shaft is fed back to the remote control end in real time according to the movement condition of the display shaft passing through the displacement sensor, and the displacement sensor is a magnetic telescopic displacement sensor.

Furthermore, the middle part of the speed reducing mechanism shell is provided with a mounting hole 1 and a mounting hole 2 at the same horizontal position, and the speed reducing mechanism shell is provided with a threaded hole.

The invention has the beneficial effects that:

1) through hand wheel clutch, no matter design mode one or mode two, can both realize normally working in the circular telegram and outage condition to simple structure, simple operation have solved manual and the unable simple swift switching of automatic operation, lack the problem of emergent guarantee ability under the emergency.

2) Through a mechano-electronic integral type display rod mechanism that can cooperate motor and gate valve, realize can be under normal conditions according to the accurate acquirement gate valve switch position of the numerical value of displacement sensor feedback, also can observe the position that the gate valve switch was acquireed to the flexible state of display rod under the condition of sensor and electronic display inefficacy or outage.

3) Through two mounting holes on the speed reducing mechanism shell, the hand wheel clutch device and the display rod mechanism are more scientific and reasonable in connection with the whole actuating mechanism, the structure of the whole actuating mechanism is simpler, and the design development period and the cost of the whole actuating mechanism are greatly reduced.

4) Through increasing torque limiter, can be around there being the ability of automatic stop when operating personnel time gate valve motor takes place overload fault, solved the problem that lacks overload fault protection function.

Drawings

Fig. 1 is a schematic view of the overall structure of a manual-automatic integrated actuator of a high-pressure gate valve according to the present invention.

Fig. 2 is a schematic structural diagram of a speed reducer mechanism of the present invention.

Fig. 3 is a schematic diagram of the motion of the retarder mechanism of fig. 2.

Fig. 4 is a schematic view of the structure of the hand wheel clutch device (mode one) in the manual operation mode of the present invention.

Fig. 5 is a schematic view of the structure of the hand wheel clutch device (mode one) in the non-manual operation mode of the present invention.

Fig. 6 is a schematic view of the overall structure of a hand wheel clutch device (mode two) according to the present invention.

Fig. 7 is a schematic view of the internal structure of a handwheel-free clutch housing of the handwheel clutch device (mode two) of the present invention.

Fig. 8 is a schematic view of the overall structure of the display lever mechanism of the present invention.

Fig. 9 is a schematic view of the arrangement of two mounting holes of the present invention.

Description of reference numerals: 1-motor housing, 2-stator core, 3-rotor, 4-reduction gear, 5-torque limiter, 6-display rod mechanism, 7-mounting holes 1, 8-mounting holes 2, 9 motor end cover, 10-motor rear end cover, 11-valve connecting cylinder, 12-hexagon socket head cap screw, 13-hexagon head bolt, 14-handwheel clutch device, 201-input shaft, 202-internal gear B1, 203-central gear A1, 204-planetary gear C1, 205-tumbler 1, 206-internal gear B2, 207-central gear A2, 208-planetary gear C2, 209-tumbler 2, 210-output shaft, 211-deep groove ball bearing, 212-reduction gear housing, 401-straight-tooth bevel gear 1, 402-straight-tooth bevel gear 2, 403-hydraulic piston rod, 404-hydraulic pump, 405-electromagnetic directional valve, 406-handle shaft, 407-hand wheel, 501-hand wheel, 502-hand wheel end cover, 503-hand wheel clutch shell, 504-rocker dustproof cap, 505-rocker, 506-spring, 507-handle, 508-full thread hexagon head bolt, 509-handle driving block, 510-directional slider, 511-conical gear, 512-directional block support, 513-circumferential fixed pin, 301-shaft elastic retainer ring, 302-display shaft, 303-magnetic displacement sensor base, 304-deep groove ball bearing 6200, 305-bearing seat, 306-sleeve, 307-magnetic ring wire rod buoy and 601-threaded hole.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.

In this embodiment, as shown in fig. 1 and 2, a manual-automatic integrated actuator for a high-pressure gate valve includes a motor housing 1, a stator core 2, a rotor 3, a speed reduction mechanism 4, a display rod mechanism 6, a motor end cover 9, a motor rear end cover 10, a hand wheel clutch 14, and a valve connecting cylinder 11; the motor shell 1 is fixedly connected with a motor end cover 9 and a motor rear end cover 10 respectively by adopting inner hexagonal cylindrical head screws 12; the stator iron core 2 is fixedly connected with the motor shell 1; the rotor 3 is fixedly connected with an input shaft 201 of the speed reducing mechanism 4; the speed reducing mechanism 4 is a two-stage planetary gear speed reducer and comprises an input shaft 201, a torque limiter 5, an internal gear B1202, a sun gear A1203, a planetary gear C1204, a rotating arm 1205, an internal gear B2206, a sun gear A2207, a planetary gear C2208, a rotating arm 2209, an output shaft 210 and a deep groove ball bearing 211; the central gear A1203 is connected with the input shaft 201 into a whole in a gear shaft mode; the internal gear B1202 and the internal gear B2206 are fixedly connected with the speed reducing mechanism shell 212 by fastening screws; the planet gear C1204 is meshed with the internal gear B1202 and the central gear A1203 respectively; the planetary gear C1204 is connected with a sun gear A2207 through matching with a rotating arm 1205; the planet gear C2208 is meshed with an internal gear B2206 and a central gear A2207 respectively; the input shaft is connected with the output shaft 210 by matching with the rotating arm 2209; the deep groove ball bearing 211 is arranged on the input shaft 201, and the upper part of the deep groove ball bearing is connected with the torque limiter 5; the speed reducing mechanism 4 is provided with a mounting hole 17 and a mounting hole 28; the display rod mechanism 6 and the hand wheel clutch device 14 are respectively arranged in a mounting hole 17 and a mounting hole 28 on the shell of the speed reducing mechanism 4; the valve connecting cylinder 11 is fixedly connected with the bottom end of the speed reducing mechanism 4 by adopting a hexagonal head bolt 13; the torque limiter 5 is arranged in the motor shell 1 and connected with the rotor 3; the speed reducing mechanism 4 is connected with a motor rear end cover 10.

The two-position four-way electromagnetic reversing valve with the emergency handle can be an oil grinding electromagnetic reversing valve DSG-01-2B2-D24-CA-N1-10 manual control electromagnetic valve.

Example 1: in the above scheme, under normal conditions, the motor receives the control signal and starts normally, and then drives the speed reduction mechanism 4.

As shown in fig. 3, a sun gear a1203 is integrally connected with an input shaft 201 in a gear shaft manner, a planet gear C1204 is respectively meshed with an internal gear B1202 and the sun gear a1203, the planet gear C1204 is respectively meshed with the internal gear B1202 and the sun gear a1203, the planet gear C1204 is connected with a sun gear a2207 through matching with a rotating arm 1205, a planet gear C2208 is respectively meshed with an internal gear B2206 and the sun gear a2207, the input shaft 201 is connected with an output shaft 210 through matching with a rotating arm 2209, when a motor normally works and drives the speed reduction mechanism 4 to move, the output shaft 210 of the speed reduction mechanism 4 generates a large torque, and then the gate valve is opened or closed.

Example 2: as shown in fig. 4, a handle shaft 406 is fixedly connected with a hydraulic piston rod 403, the hydraulic piston rod 403 is fixedly connected with a straight bevel gear 2402, the hydraulic pump 404 normally works by controlling a two-position four-way electromagnetic directional valve 405 with an emergency handle, when a left lower oil inlet is communicated with a right upper oil outlet, a left upper oil return port is communicated with a right lower oil outlet, the hydraulic piston rod 403 moves to enable the straight bevel gear 2402 to be meshed with a straight bevel gear 1401, and the rotation of the straight bevel gear 1401 indirectly drives the opening and closing of a gate valve, so that the manual control of a hand wheel 407 can be realized to control the opening or closing of the gate valve in an emergency; as shown in fig. 5, when the left lower oil inlet is communicated with the left upper outlet, the right upper oil return port is communicated with the right lower oil outlet, and the hydraulic piston rod 403 moves to disengage the straight-tooth conical gear 2402 from the straight-tooth conical gear 401, thereby closing the hand wheel operation mode.

Example 3: as shown in fig. 4, in case of power failure, the handle shaft 406 is fixedly connected with the hydraulic piston rod 403, the hydraulic piston rod 403 is fixedly connected with the straight bevel gear 2402, the straight bevel gear 2402 is meshed with the straight bevel gear 1401 by manually controlling the two-position four-way electromagnetic reversing valve 405 with the emergency handle, and the straight bevel gear 401 rotates to indirectly drive the gate valve to open or close, so that the hand wheel 406 can be manually controlled to control the gate valve to open or close in case of power failure; as shown in fig. 5, the two-position four-way electromagnetic directional valve 405 with the emergency handle is manually controlled, and then the hydraulic piston rod 403 moves to enable the straight bevel gear 2402 to be disengaged from the straight bevel gear 401, so that the hand wheel operation mode is closed.

Example 4: as shown in fig. 6 and 7, a hand wheel 501 is fixedly connected with a handle driving block 509, a reversing sliding block 510 is slidably connected with a reversing block support 512, the reversing block support 512 is fixedly connected with a rocker 505, a circumferential fixing pin 513 is installed on a pin hole of the rocker 505, an operator presses the rocker 505 to enable the reversing block support 512 on the rocker 505 to drive the reversing sliding block 510 to be matched with the handle driving block 509, at this time, the circumferential fixing pin 513 is controlled to enable the reversing sliding block 510 to be fixedly locked with the handle driving block 509, the hand wheel 501 is connected with a conical gear 511, and the rotation of the conical gear 511 can indirectly drive the opening and closing of a gate valve, so that the manual operation of the hand wheel 501 is realized to control the opening or closing of the gate valve; when the circumferential fixing pin 513 is released, the reverse slider 510 and the handle driving block 509 are disengaged from each other, thereby closing the hand wheel operation mode.

In the above embodiment, as shown in fig. 8, the display lever mechanism 6 is composed of a shaft circlip 301, a display shaft 302, a displacement sensor 303, a deep groove ball bearing 6200304, a bearing seat 305, a sleeve 306 and a magnetic ring lead screw buoy 307 and is assembled on the mounting hole 17 of the speed reducing mechanism housing 212, the bearing seat 305 and the speed reducing mechanism housing 212 are connected by a hexagon socket head cap screw 12, the sleeve 306 and the mounting hole 17 are connected by a screw thread, the display shaft 302 and the sleeve 306 are connected by a screw thread, the magnetic ring lead screw buoy 307 and the display shaft 302 are connected by a screw thread, and the magnetic ring lead screw buoy 307 and the magnetic displacement sensor magnetic ring are matched; the displacement sensor 303 is mounted on the display rod mechanism 6, is fixedly matched with the bearing seat 305, feeds back displacement data of the display shaft 302 to the remote control end in real time according to the movement condition of the display shaft passing through the displacement sensor 303, and the displacement sensor 303 is a magnetostrictive displacement sensor.

In the above embodiment, as shown in fig. 1 and 9, the mounting hole 1 and the mounting hole 2 are welded and fixed at the same horizontal position in the middle of the speed reducing mechanism housing 212, and the speed reducing mechanism housing 212 is provided with a threaded hole 601; the display rod mechanism 6 is assembled on the mounting hole 1 of the speed reducing mechanism shell 212, so that the gate valve switch position can be accurately obtained according to the value fed back by the displacement sensor under the normal condition, and the gate valve switch position can be obtained by observing the telescopic state of the display rod under the condition that the sensor and the electronic display are invalid or power is cut off.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.