Buried valve driving connection mechanism

Abstract

A buried valve driving connection mechanism. The mechanism comprises: a valve main body (100); a machine housing (200), disposed on the valve main body (100); a transmission mechanism (400), disposed on the valve main body (100); an extendable driving apparatus (300), disposed over the transmission mechanism (400); a reference apparatus (600), disposed on the machine housing (200) at one side of the extendable driving apparatus (300); and a protective cover (500), disposed on the extendable driving apparatus (300), the protective cover (500) being slidably connected to the extendable driving apparatus (300). The buried valve driving connection mechanism has a simple and compact structure, and not only can be extended within an apparatus buried in the ground, but also is provided with a protective cover (500), to protect the driving connection mechanism from dust and water, thus preventing the driving apparatus from being damaged due to the influence of torsion, and reducing maintenance frequency and maintenance costs. Furthermore, a state of the valve can be determined by means of the reference apparatus (600), thereby reducing operating errors and ensuring operating efficiency.

Description

Underground Valve Driving and Connecting Mechanism Technical Field The present invention relates to the technical field of underground valves, and particularly to an underground valve driving and connecting mechanism. Background Art An underground valve is a valve installed underground, and its main purpose is to control the fluid flow in a pipeline system, and is used in water supply and drainage systems, natural gas and oil pipelines, chemical process systems, sewage treatment systems, urban heating systems, etc. Underground valves play a key control role in various pipeline systems, ensuring the safe, efficient and reliable operation of fluids. They can be used to control flow rate, pressure, temperature and direction to meet different application requirements. Due to the special installation form of underground valves, the driving and switching device of the valve is also different from that of general valves. The Chinese patent with the application number "2022227516790" discloses an underground high corrosion-resistant and high pressure-resistant ball valve, including a ball valve body, an anti-settlement base, a connecting flange, an underground pipeline, a sealing valve neck, a switching valve ball, a switching valve stem and an anti-corrosion protection neck, wherein in the specification part

[0019] from paragraph to

[0021] discloses that the switching valve stem 7 penetrates through the sealing valve neck 5 and is connected to the switching valve ball 6. The switching valve ball 6 and the switching valve stem 7 are used to control the opening and closing of the valve. This is the most common driving and switching device for underground valves in the prior art. When manually opening and closing the valve, this type of driving device requires a large amount of manpower. After the switching valve stem is twisted multiple times, due to the torque effect, the switching valve stem will bend and deform, making maintenance and replacement troublesome. There is also no protective cover for the driving and switching device to prevent dust and water, increasing the maintenance cost. And there is no display device to display the state of the valve, which is likely to cause operation errors. The Chinese patent with the application number "2018202544668" discloses a telescopic underground valve switch tool, which relates to the field of mechanical repair tools. The telescopic underground valve switch tool includes a rotary handle, a telescopic torque rod, a positioning bracket and a socket head. The socket head is detachably connected to one end of the telescopic torque rod and has an assembly groove for tightening or loosening the valve. The positioning bracket is sleeved outside the telescopic torque rod for positioning the telescopic torque rod. A torque socket is fixedly arranged at one end of the telescopic torque rod away from the socket head. The rotary handle passes through the torque socket for driving the telescopic torque rod to rotate. The device provided by this technical solution detachably connects the socket head to one end of the telescopic torque rod and has an assembly groove for tightening or loosening. The positioning bracket is sleeved outside the telescopic torque rod for positioning the telescopic torque rod, and can replace a suitable socket head according to the valve type, and can be applicable to the switch protrusions of various underground globe valves and can achieve self-positioning. However, there are still problems: the telescopic part of the telescopic torque rod will be deformed after multiple torque twists, and the contour structure of the socket head will be worn after multiple switch operations, and there will be a slipping phenomenon when used again, and the valve cannot be successfully and effectively opened or closed, increasing the maintenance cost. Summary of the Invention The purpose of the present invention is to provide a driving connection mechanism for an underground valve, which can be telescoped in a device buried in the ground surface, and has a protective cover to prevent dust and water from entering the driving connection mechanism, and will not cause damage to the driving device due to torque influence, reducing the maintenance rate and maintenance cost. At the same time, it has a comparison device to reduce work errors, so as to solve the problems in the prior art. To achieve the above purpose, the present invention is implemented by adopting the following technical solutions: A driving connection mechanism for an underground valve includes a valve body, on which a machine shell is provided. A transmission mechanism is provided on the valve body, and a telescopic driving device is provided above the transmission mechanism. The telescopic driving device includes a driving cylinder body, a rotating cylinder rotatably connected in the driving cylinder body, a rotating column slidably connected in the rotating cylinder, and a handle connected to the end of the rotating column away from the rotating cylinder. Two or more limiting blocks are symmetrically arranged on the side wall of the rotating column along the axial direction. The inner wall of the rotating cylinder is vertically symmetrically provided with limiting sliding grooves along the axial direction. Each limiting sliding groove is in an inverted L shape, and the number of limiting sliding grooves is equal to and the positions correspond to those of the limiting blocks. The limiting blocks slide in the limiting sliding grooves. A comparison device is provided on one side of the telescopic driving device on the machine shell, and a protective cover is provided on the telescopic driving device. The protective cover is slidably connected to the telescopic driving device. Further, the transmission mechanism includes a drive shaft rotatably connected to the machine housing about a fixed axis, a transmission shaft parallel to the drive shaft and provided on the machine housing, a drive gear key-connected to the drive shaft, and a transmission gear key-connected to the transmission shaft. The transmission gear meshes with the drive gear. The upper end of the drive shaft is connected to the lower end surface of the rotating cylinder. The upper end of the transmission shaft passes through the machine housing and is rotatably connected to the machine housing about a fixed axis, and the lower end is connected to the valve body of the valve main body. Furthermore, the gear ratio of the transmission gear to the drive gear is 1:2 to 1.5:2. Furthermore, the cross-sectional area of the sliding part at the upper end of the rotating column is smaller than the cross-sectional area of the sliding part of the rotating column in the drive cylinder, and the cross-sectional area of the sliding part of the rotating column in the drive cylinder is larger than the cross-sectional area of the sleeve. Further, the control device includes a control installation pipe, a fine-tuning assembly, and an observation assembly. The control installation pipe is provided on the machine housing. The fine-tuning assembly is slidably connected to the control installation pipe. The observation assembly is provided at the top of the control installation pipe. The transmission shaft is rotatably connected to the control installation pipe about a fixed axis through a bearing. Furthermore, the fine-tuning assembly includes a fine-tuning housing, a sliding ring connected to the lower end surface of the fine-tuning housing, a fine-tuning button slidably connected to the fine-tuning housing, a lower movable claw provided below the fine-tuning button, and a compression spring provided at the power input end of the lower movable claw. An observation window is provided at the top of the fine-tuning housing. An installation opening is provided on the side wall of the fine-tuning housing. Two guiding grooves are provided on the vertical side wall of the installation opening. Two guiding blocks are provided on the side wall of the fine-tuning button. Each guiding block slides in the corresponding guiding groove. An installation frame is provided below the installation opening on the fine-tuning housing. An installation shaft is provided on the installation frame. The compression spring is sleeved on the installation shaft. The lower movable claw is hinged to the installation. An upper claw corresponding to the position of the lower movable claw is provided on the inner side wall of the fine-tuning button. A pressing rod is vertically provided on the lower end surface of the connecting arm of the upper claw, and the pressing rod contacts the upper end surface of the power input end of the lower movable claw. The power input end of the lower movable claw horizontally extends longitudinally with a limiting stop piece. A limiting stop block is provided on the fine-tuning housing at the position corresponding to the limiting stop piece. The limiting stop block is in contact connection with the limiting stop piece. An arc-shaped guiding groove is provided below the limiting stop block on the fine-tuning housing for the limiting stop piece to slide in the arc-shaped guiding groove. Furthermore, the sliding ring and the fine-tuning housing are connected by a plurality of bolt fixing members. A ball sliding groove is cooperatively provided at the contact position between the upper end surface of the sliding ring and the control installation pipe. A plurality of balls are distributed in the ball sliding groove for the fine-tuning device to rotate at the upper end of the control installation pipe. Further, the observation assembly includes a protective cover provided at the upper end of the control installation pipe and a prompting assembly. The protective cover is provided at the upper end of the control installation pipe through bolt fasteners. A transparent control window is provided at the position corresponding to the observation window on the protective cover. The prompting assembly is fastened to the upper end of the transmission shaft through a nut. The prompting assembly rotates coaxially with the valve body. The prompting assembly is located between the upper clamping jaw and the lower movable clamping jaw in the vertical direction, so that the fine-tuning device can clamp and rotate the prompting assembly for fine-tuning. Furthermore, the prompting assembly is of a disc structure. Four display areas are provided on the upper end surface of the prompting assembly. The position of the transparent control window corresponds to one of the display areas, so as to display the current open or closed state of the valve. Further, a placement groove is provided on the upper end surface of the protective cover. A handle is accommodated in the placement groove. A sleeve is provided on the lower end surface of the protective cover. The sleeve communicates with the placement groove. The rotating column slides in the sleeve. The beneficial effects of the present invention are as follows: 1. The present invention drives through a telescopic driving device and drives the valve body to complete the opening and closing of the valve through a transmission device. When not in operation, the driving device can be retracted into the device buried in the ground surface, without affecting the overall aesthetics of the road. 2. The transmission device provided by the present invention is driven by gear transmission, and is matched by the meshing of a large gear and a small gear. It not only saves operating manpower, but also will not damage the parts of the driving device due to multiple twists, reducing the maintenance rate and maintenance cost. 3. The present invention is provided with a control device. The prompting assembly in the control assembly is fastened to the upper end of the transmission shaft through a nut. The lower end of the transmission shaft is connected to the valve body. Therefore, the prompting assembly rotates coaxially with the valve body. Technicians can observe through the transparent control window of the control device to judge the current open or closed state of the valve body. 4. The present invention is provided with a protective cover to protect the driving connection mechanism from dust and rain as much as possible. Description of the Drawings Figure 1 is a schematic diagram of the overall structure of a buried valve driving connection mechanism provided by the present invention; Figure 2 is an exploded structural diagram of the telescopic driving device provided by the present invention; Figure 3 is a schematic cross-sectional structure diagram of a buried valve driving connection mechanism provided by the present invention; Figure 4 is a schematic cross-sectional structure diagram of the rotating cylinder and the rotating column provided by the present invention; Figure 5 is an enlarged schematic diagram of part A in Figure 3; Figure 6 is a schematic diagram of the overall structure of the control device provided by the present invention; Figure 7 is a partial structural cross-sectional view of the fine-tuning assembly provided by the present invention; FIG. 8 is a schematic diagram of the overall structure of the fine-tuning button provided by the present invention; FIG. 9 is a schematic diagram of the overall structure of the protective cover provided by the present invention; FIG. 10 is a schematic diagram of the overall structure of the prompt component provided by the present invention. Description of the labels in the figures: 100, valve body; 200, housing; 300, telescopic drive device; 310, drive cylinder; 320, rotating cylinder; 321, limit chute; 330, rotating column; 331, limit block; 340, handle; 400, transmission mechanism; 410, drive shaft; 420, drive gear; 430, transmission shaft; 440, transmission gear; 500, protective cover; 510, placement groove; 520, sleeve; 600, comparison device; 610, comparison installation pipe; 620, fine-tuning component; 621, fine-tuning housing; 6211, observation window; 6212, installation port; 622, sliding ring; 623, fine-tuning button; 6231, upper claw; 6232, pressure rod; 624, lower movable claw; 6241, limit retaining piece; 625, guide groove; 626, guide block; 627, mounting bracket; 628, mounting shaft; 629, limit retaining block; 630, observation component; 631, protective cover; 632, prompt component; 633, transparent comparison window; 700, compression spring; 800, ball. Detailed implementation manners To make the above objects, features, and advantages of the present invention more obvious and understandable, the following describes the detailed implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementations disclosed below. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. The embodiments are as follows: As shown in Figures 1 to 3, a buried valve drive connection mechanism includes a valve body 100, a housing 200 is welded on the valve body 100, a transmission mechanism 400 is rotatably connected to the valve body 100, a telescopic drive device 300 is rotatably connected above the transmission mechanism 400, a protective cover 500 is installed on the telescopic drive device 300, the protective cover 500 is slidably connected to the telescopic drive device 300, a placement groove 510 is opened on the upper end surface of the protective cover 500, and a handle 340 is accommodated in the placement groove 510, a sleeve 520 is welded on the lower end surface of the protective cover 500, the sleeve 520 is connected to the placement groove 510, and the upper part of the rotating column 330 slides in the sleeve 520. Compared with the prior art, the present invention is driven by the telescopic drive device 300 and driven by the transmission device 400. The valve body 100 is driven to open and close the valve. When not in operation, the telescopic drive device 300 can be retracted into a device buried in the ground without affecting the overall aesthetics of the road. The protective cover 500 protects the drive connection mechanism from dust and rain as much as possible. As a technical solution of this embodiment, specifically, the telescopic drive device 300 shown in Figures 2 to 4 includes a drive cylinder body 310, a rotating cylinder 320 rotatably connected to the drive cylinder body 310, a rotating column 330 slidably connected to the rotating cylinder 320, and a handle 340 connected to the rotating column 330 at one end away from the rotating cylinder 320. The drive cylinder body 310 is welded to the housing 200, and two limit blocks 331 are symmetrically welded below the side wall of the rotating column 330 along the axial direction, or the rotating column 330 and the two limit blocks 331 are integrally formed. The inner wall of the rotating cylinder 320 is vertically symmetrically provided with limiting grooves 321 along the axial direction. Each limiting groove 321 is inverted L-shaped. The number of limiting grooves 321 is equal to the limiting block 331 and the position corresponds. The limiting block 331 slides in the limiting groove 321. In addition, the cross-sectional area of ​​the sliding part of the rotating column 330 in the sleeve is smaller than the cross-sectional area of ​​the sliding part of the rotating column 330 in the driving cylinder. The cross-sectional area of ​​the sliding part of the rotating column 330 in the driving cylinder is larger than the cross-sectional area of ​​the sleeve 520. When operating the telescopic driving device 300, first lift the handle 340. The two limit blocks 331 slide in the vertical grooves of the two limit slide grooves 321. When the lifting height is greater than the sliding length of the rotating column on the sleeve 520, the protective cover 500 is also lifted. When the two limit blocks 331 slide to the horizontal grooves of the two limit slide grooves 321, the handle 340 cannot continue to rise, reminding the operator that the handle 340 is lifted into place and can be rotated. By turning the handle 340, the two limit blocks 331 slide in the horizontal grooves of the two limit slide grooves 321. After sliding to the rightmost end of the horizontal groove of the limit slide groove 321, the handle 340 drives the rotating cylinder 320 to rotate coaxially in the driving cylinder 310 through the rotating column 330. As the technical solution of this embodiment, specifically, as shown in FIGS. 3 and 4, the transmission mechanism 400 includes a driving shaft 410 fixedly connected to the housing 200 by a fixed axis, a transmission shaft 430 parallel to the driving shaft 410 and fixedly connected to the housing 200 by a fixed axis, a driving gear 420 key-connected to the driving shaft 410, and a transmission gear 440 key-connected to the transmission shaft 430. An installation portion is welded to one end of the driving shaft 410 away from the driving gear 420, and the installation portion is connected to the rotating cylinder 320 through a bolt fixing member. The transmission gear 440 meshes with the driving gear 420. The upper end of the driving shaft 410 is connected to the lower end surface of the rotating cylinder 320. The upper end of the transmission shaft 430 is fixedly connected to the housing 200 by a fixed axis, and the lower end is welded to the valve body of the valve body 100 or connected through a bolt fixing member. The gear ratio of the transmission gear 440 to the driving gear 420 is 1:2. When opening and closing the valve, the operator can save a lot of manpower and avoid damage to the components of the driving connection mechanism. When the handle 340 drives the rotating cylinder 320 to rotate coaxially in the driving cylinder 310 through the rotating column 330, the driving shaft 410 also rotates coaxially, driving the driving gear 420 to rotate. The driving gear 420 drives the transmission gear 440 to rotate, thereby driving the transmission shaft 430 to rotate fixedly in the housing 200. Further, the transmission shaft 430 drives the valve body to rotate to complete the opening of the valve. As the technical solution of this embodiment, further, as shown in FIGS. 1, 2, 3, and 6, the comparison device 600 includes a comparison installation pipe 610, a fine adjustment component 620, and an observation component 630. The comparison installation pipe 610 is fixedly provided on the housing through a bolt fixing member. The fine adjustment component 620 is slidably connected to the comparison installation pipe 610. The observation component 630 is provided on the top of the comparison installation pipe 610. The end of the transmission shaft 430 passing through the housing 200 rotates fixedly in the comparison installation pipe 610 through a bearing. Specifically, as shown in FIGS. 5, 7, and 8, the fine-tuning component 620 includes a fine-tuning housing 621, a sliding ring 622 connected to the lower end surface of the fine-tuning housing 621, a fine-tuning button 623 slidably connected to the fine-tuning housing 621, a lower movable pawl 624 provided below the fine-tuning button 623, and a compression spring 700 provided at the power input end of the lower movable pawl 624. The sliding ring 622 is fixed to the lower end surface of the fine-tuning housing 621 by a bolt fastener. Additionally, a ball chute is provided in cooperation with the contact surface between the upper end surface of the sliding ring 622 and the control mounting tube 610, and a number of balls 800 are distributed in the ball chute for the fine-tuning device to rotate at the upper end of the control mounting tube 610. An observation window 6211 is provided at the top of the fine-tuning housing 621, and an installation opening 6212 is provided on the side wall of the fine-tuning housing 621. Two guiding grooves 625 are provided on the vertical side wall of the installation opening 6212, and two guiding blocks 626 are provided on the side wall of the fine-tuning button 623. Each guiding block 626 slides in the guiding groove 625 at the corresponding position. Below the installation opening 6212 on the fine-tuning housing 621, there is an installation bracket 627. The fine-tuning housing 621 and the installation bracket 627 are of an integrally formed structure. A mounting shaft 628 is threadedly connected to the installation bracket 627. The compression spring 700 is sleeved on the mounting shaft 628. The upper end surface of the compression spring 700 abuts against the lower end surface of the power input end of the lower movable pawl 624. The lower movable pawl 624 is hinged on the installation. An upper pawl 6231 corresponding to the position of the lower movable pawl 624 is provided on the inner side wall of the fine-tuning button 623. The fine-tuning button 623, the guiding blocks 626, and the upper pawl 6231 are of an integrally formed structure. A pressing rod 6232 is vertically provided at the lower end surface of the connecting arm of the upper pawl 6231. The pressing rod 6232 is threadedly connected to the upper pawl 6231. The pressing rod 6232 contacts the upper end surface of the power input end of the lower movable pawl 624. A limiting tab 6241 extends horizontally longitudinally at the power input end of the lower movable pawl 624. A limiting block 629 is provided on the fine-tuning housing 621 corresponding to the position of the limiting tab 6241. The limiting block 629 is in contact connection with the limiting tab 6241. An arc-shaped guiding groove is provided below the limiting block 629 on the fine-tuning housing 621 for the limiting tab 6241 to slide in the arc-shaped guiding groove. As the technical solution of this embodiment, further, as shown in FIGS. 5, 9 and 10, the observation assembly 630 includes a protective cover 631 provided at the upper end of the control installation pipe 610 and a prompt assembly 632. The protective cover 631 is fixed to the upper end of the control installation pipe 610 through bolt fasteners. A transparent control window 633 is adhesively bonded to the protective cover 631 corresponding to the position of the observation window 6211. The material of the transparent control window 633 is a transparent material, preferably but not limited to glass material, acrylic plate material, etc. The prompt assembly 632 is fastened to the upper end of the transmission shaft 430 through a nut, and a gasket is provided between the nut and the prompt assembly 632. The gasket has a damping effect on the rotation of the prompt assembly. The prompt assembly 632 is located between the upper claw 6231 and the lower movable claw 624 in the vertical direction, so that the fine-tuning device can clamp and rotate the prompt assembly 632 for fine-tuning. Among them, the prompt assembly 632 is of a disc structure. Four display areas are provided on the upper end surface of the prompt assembly 632, and the opening or closing of the valve is indicated by markings in the display areas. The markings can be the words "open" or "closed", or a red color block can be used to indicate "closed", and a blue color block can be used to indicate "open". The markings indicating "open" and the markings indicating "closed" are arranged at intervals on the prompt assembly 632. When the valve body is opened, the position of the transparent control window 633 corresponds to the display area with the "open" marking. When the valve body is closed, the position of the transparent control window 633 corresponds to the display area with the "closed" marking. When the transmission shaft 430 drives the valve body to rotate, the prompting component 632 rotates coaxially with the valve body. The operator can observe the state of the valve body through the transparent viewing window 633. After long-term use, the rotation position of the prompting component 632 may deviate. The position of the prompting component 632 can be adjusted by the fine-tuning component 620. The operation is as follows: First, the operator presses the fine-tuning button 623. The guiding block 626 on the fine-tuning button 623 slides downward in the guiding groove 625, and the upper claw 6231 moves downward with the fine-tuning button 623. At the same time, the pressing rod 6232 on the lower end surface of the upper claw 6231 pushes the power input end of the lower movable claw 624. Since the lower movable claw 624 is hinged on the mounting bracket 627, the power input end of the lower movable claw 624 moves downward, and the limit tab 6241 moves downward in the arc-shaped guiding groove. The power output end of the lower movable claw 624 moves upward, and the upper claw 6231 and the lower movable claw 624 cooperate to clamp the prompting component 623. Then, the operator rotates the fine-tuning housing 621. The sliding ring 622 rotates at the upper end of the control mounting tube 610 and drives the fine-tuning housing 621 to rotate at the same time. The upper claw 6231 and the lower movable claw 624 clamp the prompting component 623 and rotate until the identifier in the display area is completely displayed in the transparent viewing window 633, completing the position adjustment operation of the prompting component 632. The operator releases the fine-tuning button 623. Due to the elastic deformation force of the compression spring 700, the power input end of the lower movable claw 624 is pushed upward, the power output end of the lower movable claw 624 moves downward, the power input end of the lower movable claw 624 pushes the pressing rod 6232 upward, the fine-tuning button 623 slides upward, and the upper claw 6231 moves upward. When the limit tab 6241 slides upward in the arc-shaped guiding groove to the limit stop 629, the fine-tuning button 623 and the lower movable claw 624 are both reset and completed. In summary, the structure of the present invention is simple and compact. It can not only be telescoped in the device buried in the ground surface, but also has a protective cover to prevent dust and water from entering the drive connection mechanism. Moreover, it will not be damaged due to the influence of torque on the drive device, reducing the maintenance rate and maintenance cost. And the current state of the valve body, whether it is open or closed, can be judged through the control device. The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved. In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A buried valve driving connection mechanism, comprising a valve body, on which a housing is provided, characterized in that: The valve body is provided with a transmission mechanism, and a telescopic driving device is provided above the transmission mechanism, and the telescopic driving device includes a driving cylinder body, a rotating cylinder rotatably connected in the driving cylinder body, a rotating column slidably connected in the rotating cylinder, and a handle connected to an end of the rotating column away from the rotating cylinder, and more than two limit blocks are symmetrically provided along the axial direction below the side wall of the rotating column, and limit slide grooves are vertically symmetrically provided on the inner wall of the rotating cylinder along the axial direction, each of the limit slide grooves is an inverted L-shape, and the number of the limit slide grooves is equal to that of the limit blocks and the positions correspond, and the limit blocks slide in the limit slide grooves, and a control device is provided on one side of the telescopic driving device on the casing, and a protective cover is provided on the telescopic driving device, and the protective cover is slidably connected to the telescopic driving device.

2. The underground valve drive connection mechanism according to claim 1, characterized in that: The transmission mechanism includes a driving shaft rotatably connected to the casing, a transmission shaft parallel to the driving shaft and arranged on the casing, a driving gear keyed to the driving shaft, and a transmission gear keyed to the transmission shaft, the transmission gear meshes with the driving gear, the upper end of the driving shaft is connected to the lower end surface of the rotating cylinder, the upper end of the transmission shaft passes through the casing and is rotatably connected to the casing with a fixed axis, and the lower end is connected to the valve body of the valve body.

3. The underground valve drive connection mechanism according to claim 2, characterized in that: The gear ratio of the transmission gear to the driving gear is 1:2~1.5:

2.

4. The underground valve drive connection mechanism according to claim 2, characterized in that: The cross-sectional area of ​​the sliding part at the upper end of the rotating column is smaller than the cross-sectional area of ​​the sliding part of the rotating column in the driving cylinder, and the cross-sectional area of ​​the sliding part of the rotating column in the driving cylinder is larger than the cross-sectional area of ​​the sleeve.

5. The underground valve drive connection mechanism according to claim 2, characterized in that: The control device includes a control mounting tube, a fine-tuning component and an observation component. The control mounting tube is arranged on the casing, the fine-tuning component is slidably connected to the control mounting tube, the observation component is arranged on the top of the control mounting tube, and the transmission shaft rotates in the control mounting tube through a bearing.

6. The underground valve drive connection mechanism according to claim 5, characterized in that: The fine-tuning assembly comprises a fine-tuning housing, a sliding ring connected to the lower end surface of the fine-tuning housing, a fine-tuning button slidably connected to the fine-tuning housing, a lower movable claw arranged below the fine-tuning button, and a compression spring arranged at the power input end of the lower movable claw. An observation window is provided on the top of the fine-tuning housing, a mounting opening is provided on the side wall of the fine-tuning housing, two guide grooves are provided on the vertical side wall of the mounting opening, two guide blocks are provided on the side wall of the fine-tuning button, each of the guide blocks slides in the guide groove at the corresponding position, a mounting frame is provided below the mounting opening on the fine-tuning housing, and a mounting shaft is provided on the mounting frame. The compression spring sleeve is arranged on the mounting shaft, the lower movable claw is hinged on the mounting, an upper claw corresponding to the position of the lower movable claw is arranged on the inner wall of the fine-tuning button, a pressure rod is vertically arranged on the lower end surface of the upper claw connecting arm, the pressure rod contacts with the upper end surface of the power input end of the lower movable claw, the power input end of the lower movable claw extends horizontally and longitudinally with a limit block, a limit block is arranged on the fine-tuning shell corresponding to the position of the limit block, the limit block is in contact with the limit block, and an arc guide groove is opened below the upper limit block of the fine-tuning shell for the limit block to slide in the arc guide groove.

7. The underground valve drive connection mechanism according to claim 6, characterized in that: The sliding ring is connected to the fine-tuning housing by a plurality of bolt fixings, and a ball groove is provided at the contact point between the upper end surface of the sliding ring and the control mounting tube. A plurality of balls are distributed in the ball groove so that the fine-tuning device can rotate at the upper end of the control mounting tube.

8. The underground valve drive connection mechanism according to claim 6, characterized in that: The observation assembly includes a protective cover and a prompt assembly arranged at the upper end of the control mounting tube. The protective cover is arranged at the upper end of the control mounting tube by bolt fasteners. A transparent control window is provided at the position of the protective cover corresponding to the observation window. The prompt assembly is fastened to the upper end of the transmission shaft by a nut. The prompt assembly is located between the upper clamping claw and the lower movable clamping claw in the vertical direction so that the fine-tuning device can clamp and rotate the prompt assembly for fine-tuning.

9. The underground valve drive connection mechanism according to claim 8, characterized in that: The prompt component is a disc structure, and four display areas are arranged on the upper end surface of the prompt component. The transparent contrast window corresponds to the position of one of the display areas to display whether the current valve is in an open or closed state.

10. The underground valve drive connection mechanism according to claim 1, characterized in that: The upper end surface of the protective cover is provided with a placement groove, and the handle is accommodated in the placement groove. The lower end surface of the protective cover is provided with a sleeve, and the sleeve is communicated with the placement groove. The rotating column slides in the sleeve.

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