CN109826236B - Adjustable protection well lid arranged in well - Google Patents

Abstract

The invention discloses an adjustable protection well cover arranged in a well, which comprises a fence body arranged in the well, wherein the fence body comprises a drawing inner pipe and a drawing outer pipe which is sleeved on the drawing inner pipe and can move along the drawing inner pipe, a plurality of bearing pipes are arranged on the drawing outer pipe, branch holes for branch pipes to pass through are formed in the bearing pipes, and the plurality of bearing pipes are connected through the branch holes. The free end of the drawing inner pipe is provided with a hinge body, the adjustable protection well lid can be installed on the inner wall of the well through the hinge body, and the end part of the drawing outer pipe is provided with a lock for locking the adjustable protection well lid arranged in the well. This adjustable protection well lid that sets up in the well has adjustable support protection scope, and the dismouting maintenance of being convenient for and protection security performance is good advantage.

Description

Adjustable protection well lid arranged in well

Technical Field

The invention belongs to the field of well equipment, and particularly relates to an adjustable protection well cover arranged in a well.

Background

In the prior art, various underground wells of urban streets are usually only provided with a single-layer well cover arranged at a road surface well head, and the well cover is easy to crush and damage, is easy to be stolen and lost, and under the condition, the well facilities can be stolen or damaged by artificial maliciousness, and the accidents of personnel falling into the well can be caused by illegal use of the well facilities. In addition, after the well covers are damaged, the well covers cannot be monitored and alarmed at the first time, so that the well covers cannot be timely handled for maintenance.

Furthermore, the shapes and the calibers of the wellheads of various underground wells are different, so that the well covers are required to be customized according to the specifications of the wellheads, and the general well covers suitable for different wellheads are lacking.

Therefore, there is a need to further enhance the protective performance of the manhole cover and enable versatility of the protective manhole cover.

Disclosure of Invention

The invention mainly solves the technical problems of low protection performance of a single-layer well cover and low universality of the well cover in the prior art by providing an adjustable protection well cover arranged in a well.

In order to solve the technical problems, the technical scheme adopted by the invention is to provide an adjustable protection well cover arranged in a well, which comprises a fence body arranged in the well, wherein the fence body comprises a drawing inner pipe and a drawing outer pipe which is sleeved on the drawing inner pipe and can move along the drawing inner pipe, a plurality of bearing pipes are arranged on the drawing outer pipe, branch holes for branch pipes to pass through are formed in the bearing pipes, and the plurality of branch pipes pass through the branch holes to connect the plurality of bearing pipes; the free end of the drawing inner pipe is provided with a hinge body, the adjustable protection well cover can be installed on the inner wall of a well through the hinge body, and the end part of the drawing outer pipe is provided with a lock for locking the adjustable protection well cover arranged in the well.

In another embodiment of the adjustable protection manhole cover arranged in the well, a plurality of first fixing holes which correspond to each other in position and are used for fixedly combining the pulling outer pipe and the bearing pipe are formed in the pulling outer pipe and the bearing pipe; the bearing pipe and the branch pipe are provided with a plurality of second fixing holes which correspond to each other in position and are used for fixedly combining the bearing pipe and the branch pipe.

In another embodiment of the adjustable protection manhole cover arranged in the well, a groove is formed in the upper surface and/or the lower surface of the drawing inner pipe along the axial direction of the drawing inner pipe, and the first fixing hole is formed in the upper surface and/or the lower surface of the drawing outer pipe and corresponds to the groove in position.

In another embodiment of the adjustable protection well cover arranged in a well, a first connecting ring, a second connecting ring and a connecting piece are arranged in the drawing outer tube, two ends of the connecting piece are respectively connected with the first connecting ring and the second connecting ring, the drawing inner tube is provided with a strip-shaped slideway hole, the first connecting ring passes through the slideway hole and is arranged in the drawing inner tube, and the drawing outer tube moves along the drawing inner tube to drive the first connecting ring to move along the slideway hole in the drawing inner tube.

In another embodiment of the adjustable protection well cover arranged in the well, the hinge body comprises a hinge, a movable page of the hinge is connected with one exposed end of the drawing inner pipe, a fixed page of the hinge is connected with a first connector, and the first connector is connected with the inner wall of the well.

In another embodiment of the adjustable protection manhole cover arranged in the well, the free end of the drawing outer pipe is provided with a second connector for supporting the drawing outer pipe, and the second connector is connected with the inner wall of the well.

In another embodiment of the adjustable protection well lid arranged in a well, the lockset comprises a lock shell and a lock cylinder which are arranged in the drawing outer tube, the lock cylinder is arranged in the lock shell, the lock cylinder comprises an outer lock cylinder and an inner lock cylinder which are matched together, a key hole for a key to be inserted and rotated is formed in a port of the inner lock cylinder, a hole for exposing the port of the lock shell and the port of the inner lock cylinder is formed in the upper surface of the drawing outer tube, a containing box is arranged below the lock shell, a storage battery and a lock tongue which stretches out and draws back along with the rotation of the inner lock cylinder are arranged in the containing box, a lock tongue hole for the lock tongue to pass through is formed in the containing box, and a lock groove for the lock tongue to stretch in is formed in the second connector; when a key is inserted into the inner lock cylinder, the lock tongue penetrates through the lock tongue hole and stretches into the lock groove to complete locking; and when the key is inserted into the lock groove, the inner lock cylinder is rotated, so that the lock tongue extends out of the lock groove to complete unlocking.

In another embodiment of the adjustable protection well cover arranged in the well, the accommodating box comprises a lock cavity and a battery cavity, the storage battery is arranged in the battery cavity, an electronic lock cylinder is arranged in the lock cavity, the electronic lock cylinder comprises a sliding shell, the sliding shell is connected with the lock tongue, the sliding shell is also connected with a motor component, a control module and a communication module for controlling the motor component are arranged on the side wall of the lock cavity, a signal from an internet of things platform is received through the communication module, an in-lock password is arranged on the control module, a Bluetooth module is arranged on the control module, when the lock is unlocked through the Bluetooth module, the Bluetooth module receives a Bluetooth signal from a user communication terminal, the Bluetooth signal comprises an unlocking password, the control module compares the unlocking password with the in-lock password, and if the unlocking password is the same, the electronic lock cylinder is controlled to drive the lock tongue to leave the lock groove or the lock hole to finish.

In another embodiment of the adjustable protection manhole cover arranged in a hoistway, the sliding shell is provided with a shell cavity, a rotary spring is arranged in the shell cavity, the motor assembly comprises a driving motor and a rotating shaft, the driving motor is connected with the rotating shaft, and the rotating shaft penetrates through the shell cavity and is sleeved with the rotary spring; when the driving motor rotates forwards or reversely, the rotating shaft rotates to drive the rotary spring to compress or stretch in a rotating mode, and the rotary spring compresses or stretches to deform to drive the sliding shell to move forwards and backwards along the axial direction of the rotating shaft.

In another embodiment of the adjustable protection manhole cover arranged in a hoistway, a first waterproof joint and a second waterproof joint are arranged on the front end face and the rear end face of the accommodating box, a magnet sensor is arranged in the second waterproof joint, the magnet sensor is electrically connected with the control module and corresponds to the magnet sensor, a magnet is arranged on the second connector, when the lockset is illegally pried to be unlocked, the gap between the magnet sensor and the magnet exceeds a set gap, and the magnet sensor gives an alarm through the control module.

The beneficial effects of the invention are as follows: the invention discloses an adjustable protection well cover arranged in a well, which comprises a fence body arranged in the well, wherein the fence body comprises a drawing inner pipe and a drawing outer pipe which is sleeved on the drawing inner pipe and can move along the drawing inner pipe, a plurality of bearing pipes are arranged on the drawing outer pipe, branch holes for branch pipes to pass through are formed in the bearing pipes, and the plurality of bearing pipes are connected through the branch holes. The free end of the drawing inner pipe is provided with a hinge body, the adjustable protection well lid can be installed on the inner wall of the well through the hinge body, and the end part of the drawing outer pipe is provided with a lock for locking the adjustable protection well lid arranged in the well. This adjustable protection well lid that sets up in the well has adjustable support protection scope, and the dismouting maintenance of being convenient for and protection security performance is good advantage.

Drawings

FIG. 1 is a schematic view of an embodiment of the present invention disposed within a hoistway;

FIG. 2 is an exploded view of the inner and outer telescoping tubes, carrier and manifold of another embodiment of the adjustable protective manhole cover of the present invention disposed within a hoistway;

FIG. 3 is a schematic view of a pull inner tube of another embodiment of the adjustable protective manhole cover of the present invention disposed within a hoistway;

FIG. 4 is an exploded view of a first connector connection in another embodiment of the present invention for an adjustable protective manhole cover disposed in a hoistway;

FIG. 5 is an assembled schematic view of the embodiment of FIG. 4;

FIG. 6 is a partially exploded schematic illustration of another embodiment of the adjustable protective manhole cover of the present invention disposed within a hoistway;

FIG. 7 is an assembled schematic view of the embodiment of FIG. 6;

FIG. 8 is a partial schematic view of another embodiment of the adjustable protective manhole cover of the present invention disposed within a hoistway;

FIG. 9 is a schematic bottom view of a lock housing of another embodiment of the adjustable protective manhole cover of the present invention disposed within a hoistway;

fig. 10 is an exploded view of a motor assembly and a sliding housing of another embodiment of the adjustable protective manhole cover of the present invention disposed within a hoistway;

FIG. 11 is a schematic view of the motor assembly and sliding housing assembly of the embodiment of FIG. 10;

Fig. 12 is an exploded view of a decelerator of another embodiment of the present invention disposed within a hoistway;

FIG. 13 is a schematic diagram of a control module of an adjustable protective manhole cover disposed within a hoistway in accordance with the present invention;

fig. 14 is a schematic view of a communication module of the adjustable protective manhole cover of the present invention disposed within a hoistway.

Detailed Description

In order that the invention may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Fig. 1 is a schematic view of an embodiment of an adjustable protection manhole cover disposed in a hoistway, as shown in fig. 1, the adjustable protection manhole cover disposed in the hoistway includes a fence body 1 disposed in the hoistway, the fence body 1 includes a pull inner pipe 2, and a pull outer pipe 3 sleeved on the pull inner pipe 2 and capable of moving along the pull inner pipe 2, and a plurality of bearing pipes 4 are disposed on the pull outer pipe 3, preferably, the bearing pipes 4 are disposed vertically and longitudinally, and the bearing pipes 4 may also be disposed obliquely. The bearing pipe 4 is provided with a support hole 6 for the branch pipe 5 to pass through, a plurality of branch pipes 5 can be arranged in parallel to pass through the support hole 6 to connect a plurality of the bearing pipes 4, the free end of the drawing inner pipe 2 is provided with a hinge body T1, the adjustable protection well cover can be installed on the inner wall of a well through the hinge body, and the end part of the drawing outer pipe 3 is provided with a lock 9 for locking the adjustable protection well cover.

The fence body 1 can enlarge the protection range of the well lid through sleeving and assembling of various sleeves, is suitable for shafts with various diameters of different specifications, enhances the adjustable performance of the well lid, is flexible and changeable, is not single in form, is simple to assemble and disassemble, and is convenient to carry.

Through setting up the protection well lid in the well, can still can carry out safety protection to the facility in the well after the well lid is impaired of the ground of well head. The drawable protective well cover can reasonably set the lengths of the inner pipe and the outer pipe according to the caliber of the well, and set the lengths, the combination mode, the combination shape and the density of the bearing pipe and the branch pipe, and the pipe fittings are combined together through splicing, so that the flexibility of size adjustment is stronger, and the structure is fixed and formed after one-step forming unlike the well cover which is cast at one time.

Preferably, the drawing inner tube 2 is matched with the radial cross-sectional shape of the drawing outer tube 3, so as to facilitate the sleeving and matching of the drawing inner tube and the drawing outer tube, and in this embodiment, the cross-sectional shape of the drawing inner tube and the drawing outer tube is square, and in practice, the drawing inner tube and the drawing outer tube can be in various shapes, such as a circle, a trapezoid, a diamond, and the like, which are not limited to the present invention. The square shape is adopted, so that the stability of the inner drawing pipe 2 in the outer drawing pipe 3 can be enhanced, the inner drawing pipe and the outer drawing pipe can not rotate in relative positions, the stability of the bearing pipe 4 sleeved on the outer drawing pipe 3 is further ensured, the branch pipe 5 penetrating through the bearing pipe 4 is a circular pipe, the torsional strength of the branch pipe 5 can be enhanced, in practical situations, if the bending strength of the branch pipe 5 needs to be enhanced, the branch pipe 5 can be changed into a square pipe, the shape of the branch pipe 5 can be selected from various shapes such as diamond, trapezoid, ellipse and the like, and the embodiment is not limited. And the square tube is favorable for arranging a sliding track inside the drawing inner tube 2, so that the drawing relative movement between the drawing inner tube 2 and the drawing outer tube 3 is facilitated.

Preferably, the caliber of the drawing outer tube 3 is slightly larger than that of the drawing inner tube 2, so that the drawing outer tube 3 can conveniently move along the drawing inner tube 2.

Preferably, as shown in fig. 2, the outer drawing tube 3 and the carrying tube 4 are provided with a plurality of first fixing holes 11 corresponding to each other in position and used for fixedly combining the outer drawing tube 3 and the carrying tube 4.

The spacing of the first fastening holes 11 determines the density of the carrier tube 4 along the outer tube 3. Preferably, the first fixing holes 11 are arranged at equal intervals, which is beneficial to balancing the whole adjustable well cover, so that the whole adjustable well cover is not deviated from the gravity center and is inclined.

The bearing tube 4 and the branch tube 5 are provided with a plurality of second fixing holes 12 which are corresponding in position and used for fixedly combining the bearing tube 4 and the branch tube 5.

The spacing distance between the second fixing holes 12 determines the density of the branch pipes 5, and preferably, the second fixing holes 12 are equally spaced, which functions similarly to the first fixing holes 11 and will not be described herein.

The interval distance between a plurality of first fixed orifices 11 that pull outer tube 3 pipe shaft was seted up can be adjusted according to actual well size to arrange suitable quantity bear pipe 4, through setting up a plurality of different interval distances bear pipe 4, can adjust the scope of well lid radiation protection plays better safety interception and protection effect. Likewise, by adjusting the arrangement position of the branch holes 6 on the carrier pipe 4, the branch pipes 5 can be arranged on the carrier pipe 4 at different intervals, so that the adjustment of the protection range is achieved. The branch pipe 5 penetrating the bearing pipe 4 can be more firmly fixed on the bearing pipe 4 due to the arrangement of the second fixing holes 12, so that the protection anti-collision performance of the well lid is enhanced. The fixing means at the positions of the first fixing hole 11 and the second fixing hole 12 may be various, such as screw connection, bolt connection, welding connection, chemical adhesive connection, etc.

Preferably, the protection purpose can be better achieved by adjusting the lengths of the inner drawing pipe 2, the outer drawing pipe 3, the bearing pipe 4 and the branch pipe 5. If the cross section of the well is square, the bearing pipe 4 and the branch pipe 5 with the same length can be adopted, so that the branch pipe 5 and the bearing pipe 4 can be fully matched with the well wall, the protection range of the branch pipe 5 is better expanded, if the cross section of the well is circular, the length of the bearing pipe 4 and the branch pipe 5 which are arranged close to the circle center is longer, and the length of the bearing pipe 4 and the branch pipe 5 which are arranged far away from the circle center is shorter.

Preferably, the carrying tube 4 is not necessarily vertically disposed on the outer drawing tube 3, and the carrying tube 4 and the outer drawing tube may be disposed at a certain angle, for example, 30 degrees, 45 degrees, 60 degrees, etc., that is, not vertically disposed in a crossing manner, and similarly, the carrying tube 4 and the branch tube 5 may be disposed at a certain angle. For example, when the outer drawing tube 3 and the carrier tube 4, and the carrier tube 4 and the branch tube 5 are all disposed perpendicularly intersecting each other, the shape of the gap formed by the carrier tube 4, the outer drawing tube 3, and the branch tube 5 is square; when the bearing pipe 4 and the drawing outer pipe 3 are vertically crossed, the branch pipe 5 is arranged on the bearing pipe 4 in a certain deviation angle, and the gap is triangular and parallelogram; when the carrying tube 4 is arranged at a certain angle with respect to the drawing outer tube 3, the branch tube 5 may be arranged radially on the carrying tube 4, the gap shape may have a triangular shape and a square shape, and the branch tube 5 may also be arranged on the carrying tube 4 at a certain angle with respect to the gap shape, the gap shape may have a triangular shape and a parallelogram shape. The change of the arrangement form can change the shape of the gap so as to obtain better stability of the protective structure.

Preferably, as shown in fig. 3, a groove 21 is formed on the upper surface and/or the lower surface of the drawing inner tube 2 and along the axial direction of the drawing inner tube 2, and the first fixing hole 11 is formed on the upper surface and/or the lower surface of the drawing outer tube 3 and corresponds to the position of the groove 21. When the outer drawing tube 3 slides on the inner drawing tube 2, the grooves 21 can reduce friction contact between the fixing piece at the first fixing hole 11 and the inner drawing tube 2, so that abrasion of the inner drawing tube 2 and the outer drawing tube 3 is effectively reduced.

It is further preferred that the cross-sectional shape of the recess 21 is a variety of, for example, square, trapezoid, arc, etc., and square is selected here.

Further preferably, a first connecting ring, a second connecting ring and a connecting piece are arranged inside the drawing outer tube 3, two ends of the connecting piece are respectively connected with the first connecting ring and the second connecting ring, the connecting piece can be a rope, the drawing inner tube 2 is provided with a strip-shaped slideway hole 22, the first connecting ring passes through the slideway hole 22 and is arranged in the drawing inner tube 2, and the drawing outer tube 3 moves along the drawing inner tube 2 to drive the first connecting ring to move along the slideway hole 22 in the drawing inner tube 2. The first connecting ring, the second connecting ring and the connecting piece can pull the outer drawing tube 3 to prevent the outer drawing tube 3 from separating when the outer drawing tube 3 is pulled away from the inner drawing tube 2, the first connecting ring moves in the slideway hole 22, and when the first connecting ring moves to the two ends of the slideway hole 22, the first connecting ring props against the end part of the slideway hole 22 to prevent the first connecting ring from sliding away from the inner drawing tube 2, so that the outer drawing tube 3 is not separated from the inner drawing tube 2, the firmness of the combined parts is ensured, and the safety problem caused by the separation of the parts is avoided.

Preferably, the first connecting ring and the second connecting ring are members fixedly arranged in the drawing outer tube, the shapes of the first connecting ring and the second connecting ring can be selected from ring shapes, hook shapes, block shapes and the like, the ring shapes are selected in the embodiment, the connecting pieces can also be selected from various shapes, such as iron chains, ropes, rods, wires, elastic ropes, elastic rods and the like, and the iron chains are selected. The shape of the slideway hole 22 can also be selected from a plurality of shapes, such as rectangle, oblong, wave, etc., in this embodiment, the oblong shape is selected and used, and the width of the slideway hole 22 is slightly larger than the thickness of the first connecting ring, so that the smoothness of the first connecting ring sliding in the slideway hole 22 is ensured, and the first connecting ring is prevented from oscillating with the wall of the slideway hole 22 in the sliding process, thereby ensuring the stable sliding of the first connecting ring.

Preferably, referring to fig. 1, fig. 4 and fig. 5, the hinge body T1 includes a hinge structure, such as a rotating hinge support or a hinge, in this embodiment, the hinge is selected, one exposed end of the pull inner tube 2 is connected with the hinge 7, the movable hinge 71 of the hinge 7 is connected with one exposed end of the pull inner tube 2, the fixed hinge 72 of the hinge 7 is connected with the first connector 8, and the first connector 8 is connected with the inner wall of the hoistway. The one end that pull inner tube 2 exposes is fixed to be set up on the movable page 71 of hinge 7, the fixed page 72 fixed connection of hinge 7 the upper surface of first connector 8, the fixed mode is various, like bolt, screwed connection etc. when the movable page 71 of hinge 7 rotates, fixed page 72 is motionless, just the movable page 71 drives pull inner tube 3 rotates around this hinge 7, drives whole fence body 1 and turns over the well head in succession, reaches the purpose that the well was opened.

Preferably, referring to fig. 1, 4 and 5, the first connector 8 includes a casing 81 covered on the outside, a casing frame 82 disposed at a lower portion of the casing 81, and a bottom casing 83 fastened thereto is further disposed under the casing frame 82. Three kidney-shaped holes 84 are formed in the side walls of the case 81 and the case frame 82, one end of the fixing rod 80 is conveniently inserted, the other end of the fixing rod 80 is inserted into and fixed in a shaft wall, a nut is arranged on the fixing rod 80 to fasten the first connecting body 8 and the fixing rod 80, and a flat washer can be additionally arranged on the fixing rod 80 to reduce friction between the fixing rod 80 and the first connecting body 8 and prolong the service life of the first connecting body 8 and the fixing rod 80. The upper surface of the case 81 is provided with a slotted hole 85 embedded with the hinge 7, the upper surface of the case frame 82 is also provided with a rectangular hole 86 embedded with the hinge 7, the lower part of the side wall of the case frame 82 is provided with two fastening clamps 87 extending towards the lower surface of the bottom shell 83, the fastening clamps 87 are provided with protrusions extending upwards, the lower surface of the bottom shell 83 is provided with square holes 88 matched with the protrusions, and when the case frame 82 is covered on the bottom shell 83, the protrusions are clamped into the square holes 88 to achieve the purpose of fastening. The two edges of the upper part of the bottom shell 83 are provided with an inner turning plate 831, a plurality of holes 89 are formed in the inner turning plate 831, and similarly, a plurality of holes 89 are formed in corresponding positions on the upper surfaces of the box frame 82 and the box shell 81, the box frame 82 and the bottom shell 83 are fixedly connected together by connecting the holes 89 in the corresponding positions through rivet nuts. By arranging the first connector 8, the hinge 7 can be conveniently assembled on the first connector, so that the drawing inner pipe 2 has the function of being capable of being lifted and turned over, and also has a stable supporting effect on the fence body 1.

Preferably, referring to fig. 6 and fig. 7, the free end of the outer drawing tube 3 is provided with a second connector 36 for supporting the outer drawing tube 3, the second connector 36 is connected with the inner wall of the well, and the second connector 36 supports the outer drawing tube 3 and is fixedly connected with the inner wall of the well, so that stability and firmness are provided for the adjustable protection well cover.

Preferably, referring to fig. 6 and 7, the lock 9 includes a lock housing 31 and a lock cylinder 32 disposed in the outer draw tube 3, the lock cylinder 32 is disposed in the lock housing 31, the lock cylinder 32 includes an outer lock cylinder 321 and an inner lock cylinder 322 that are matched together, a keyhole 323 through which the key Y1 is inserted and rotated is provided at a port of the inner lock cylinder 322, and a hole 324 through which the port of the lock housing 31 and the port of the inner lock cylinder 322 are exposed is provided at an upper surface of the outer draw tube 3.

The accommodating box 34 is installed below the lock shell 31, a storage battery and a lock tongue 325 which stretches out and draws back along with the rotation of the inner lock cylinder 322 are arranged in the accommodating box 34, a lock tongue hole 326 for the lock tongue 325 to pass through is formed in the accommodating box 34, and a lock groove 327 for the lock tongue 325 to stretch in is formed in the second connecting body 36.

When the key Y1 is inserted, the inner cylinder 322 is rotated so that the locking bolt 325 passes through the locking bolt hole 326 and protrudes into the locking groove 327 to complete locking.

When the key Y1 is inserted, the inner lock cylinder 322 is rotated so that the bolt 325 extends out of the locking groove 327 to complete unlocking.

Preferably, in combination with fig. 6 and 7, the manhole cover further comprises a fixing clip for fixing the lock 9 and the containing box 34 on the drawing outer tube 3, the fixing clip comprises a first fixing clip J1 and a second fixing clip J2, and the first fixing clip J1 and the second fixing clip J2 are in an eversion mouth design, so that the fixing cooperation of the lock 9 and the containing box is facilitated. The tool to lock 9, hold case 34 and the fixed setting of pull outer tube 3 of three through first fixation clamp J1 and second fixation clamp J2 together, strengthened the wholeness of tool to lock 9 and hold case 34, reduced the tool to lock 9 and hold the step of case 34 dismantlement equipment alone, simplified the installation of well lid, improved the efficiency of construction and later maintenance.

Preferably, holes are formed on the front and rear end surfaces of the accommodating case 34 for installing the first waterproof connector 341 and the second waterproof connector 342, thereby improving the waterproof sealing performance. The accommodating box 34 includes a lock cavity and a battery cavity, specifically, the accommodating box 34 is hollow and is divided into two chambers by a partition board, a hole is formed in the partition board for communicating the two chambers, the chamber with a downward opening is the battery cavity (the downward opening is not shown in the figure), the chamber with an upward opening is the lock cavity Q1, and the storage battery is installed in the battery cavity.

The opening of the lock cavity Q1 is the lock shell 31, the lower part of the lock shell 31 extends to form a cover body 311 with a shape matching with the opening of the lock cavity Q1, and the cover body 311 covers the lock cavity Q1 to ensure the tightness thereof. The cover 311 is provided with a hole 312, and a saddle Q2 corresponding to the hole 312 is provided with a hole for fixing the drawing outer tube 3.

A battery inner cover 343 is arranged below the battery cavity and is matched with the battery cavity, and the battery inner cover 343 and the battery inner cover are fixed through bolts so as to improve the waterproof sealing property of the battery cavity. Below the inner battery cover 343, and with the inner battery cover 343 looks adaptation be provided with the outer battery cover 344, the outer battery cover 344 covers the inner battery cover 343, further improves the waterproof leakproofness of battery chamber.

Preferably, the lock case 31 is placed in a hole (not shown) formed below the drawing outer tube 3, and the hole 313 is exposed through the hole 324.

Further preferably, a rubber plug 314 is provided on the outer pulling tube 3, and a plug 315 of the rubber plug 314 is adapted to the hole 313 of the lock housing 31, so as to tightly cover the hole 313, thereby preventing water or dust from entering the lock housing 31 and blocking the damaged lock core 32.

Further preferably, a magnet sensor 35 may be disposed in the second waterproof joint 342, the magnet sensor 35 is electrically connected to the control module, the second connector 36 is disposed below the free end of the outer drawing tube 3 and near the magnet sensor 35, and the magnet 37 is disposed in the second connector 36 corresponding to the magnet sensor 35. Under normal state, the clearance between the magnet inductor 35 and the magnet 37 is very small, the clearance range is 0-15mm, when the outside is not authorized to unlock or forcedly pry the well lid, the clearance between the magnet inductor 35 and the magnet 37 exceeds the set clearance, the magnet inductor 35 sends out an alarm through the control module, and the protection safety of the well lid is improved by arranging the door magnetic protection alarm device.

Preferably, the second connector 36 has a structure similar to that of the first connector 8, except that a plurality of limiting risers 381 for limiting the free end of the outer tube 3 are disposed on the upper surface 38 of the second connector 36, and a plugging head 39 adapted to the free end of the outer tube 3 is disposed on the free end of the outer tube 3. The positioning of the limiting vertical plate 381 enhances the stability of the fence body 1, and the sealing head 39 provides better tightness for the outer drawing tube 3.

Preferably, as shown in fig. 6, fig. 8 and fig. 9, an electronic lock core is disposed in the accommodating box, further preferably, the electronic lock core is disposed in the lock cavity Q1, the electronic lock core includes a sliding shell U1, the sliding shell U1 is connected with the lock tongue 325, the sliding shell U1 is further connected with a motor component U2, a control module and a communication module for controlling the motor component U2 are disposed on a side wall of the lock cavity Q1, a lock inner password is set for the control module by the communication module receiving a signal from the internet of things platform, a bluetooth module is disposed on the control module, when unlocking, the bluetooth module receives a bluetooth signal from the user communication terminal, the bluetooth signal includes an unlocking password, the control module compares the unlocking password with the lock inner password, and if the unlocking password is the same, the lock tongue is controlled to leave the lock groove or the lock hole to complete unlocking.

The lock for the protection well lid can remotely receive the unlocking password, and performs information check with the password in the lock, so that the unlocking purpose is achieved, personnel are not required to be close to the lock, intelligent remote unlocking is realized, the distance limit of common unlocking is overcome, and the position constraint during unlocking is eliminated. This a tool to lock for protecting well lid accessible bluetooth authorizes the authority of unblanking for many people, realizes the handing over of authority of unblanking, and accessible bluetooth dynamic modification unblanking password simultaneously realizes the dynamic modification of tool to lock password, has ensured the security when password was leaked carelessly.

Preferably, a sealing gasket Q11 with a shape adapted to the port is additionally arranged below the lock shell 31 and above the lock cavity Q1, so as to enhance the sealing property of the accommodating box 34 and play a waterproof function.

Further preferably, the sliding housing U1 has a housing cavity, a rotary spring U12 is disposed in the housing cavity, the motor assembly U2 includes a driving motor U21 and a rotating shaft U22, the driving motor U21 is connected to the rotating shaft U22, and the rotating shaft U22 penetrates through the housing cavity and is sleeved with the rotary spring U12.

When the driving motor U21 rotates forward or backward, the rotating shaft U22 rotates to drive the rotary spring U12 to compress or stretch, the rotary spring U12 compresses or stretches to deform to drive the sliding housing U1 to move forward or backward along the axis of the rotating shaft U22, and the locking tongue 325 further extends into or out of the locking groove 327 to complete locking or unlocking.

Further preferably, the motor assembly U2 is mounted on a bracket in the lock cavity Q1, the sliding housing U1 is mounted on a carriage, and when the driving motor U21 rotates, the rotation of the rotating shaft U22 drives the rotating spring U12 to compress or stretch, and then drives the sliding housing U1 to slide, so that the lock tongue 325 moves.

Further preferably, the bottom surface of the lock housing 31 is provided with two parallel vertical plates 316, the distance between the two vertical plates 316 is approximately equal to the width of the sliding housing U1, and the vertical plates 316 are arranged to maintain the consistency and stability of the direction of the sliding housing U1 during sliding, so that the sliding housing U1 is not deviated from a preset moving track, and the lock tongue cannot accurately extend into or extend out of the lock slot.

Preferably, a rolling element U13 is disposed on the upper surface of the sliding shell U1, a rolling groove U14 is adapted to the rolling element U13, and when the sliding shell U1 slides, the rolling element U13 rolls relatively in the rolling groove U14, which plays a role in reducing friction force of the sliding shell U1, prolonging service life of the sliding shell U1, and the rolling element may be in various forms, such as a cylindrical ball, a spherical ball, or a tire-shaped ball, and the number of the rolling elements is not limited, and may be one or more. In this embodiment, cylindrical balls are selected.

Preferably, the sliding shell U1 is in a strip shape, and covers the motor assembly U2, so as to block dust from entering the motor assembly U2.

Further preferably, the upper surface of the sliding shell U1 is provided with an arc buckle U15, a rotating shifting piece U16 is disposed above the arc buckle U15 and below the lock shell 31 and connected with the lock cylinder 32, the rotating shifting piece U16 can rotate along with rotation of the inner lock cylinder, the rotating shifting piece U16 can stir the arc buckle U15 to move when rotating, and the movement of the arc buckle U15 drives the sliding shell U1 to move, so as to drive the lock tongue 325 to move back and forth, and the lock tongue 325 moves into or out of the lock groove 327 to complete locking or unlocking. The device satisfies the mechanical unlocking under the condition of insufficient battery power or emergency, and increases the unlocking mode.

Fig. 10 is an exploded view of the motor assembly U2 and the sliding housing U1, and fig. 11 is an assembled view of the embodiment shown in fig. 10.

Preferably, in combination with fig. 10 and 11, the rotating shaft U22 may be an integral rotating shaft, two symmetrical radial protrusions U221 are disposed on two sides of the outer surface of the rotating shaft U22, and the rotating spring U12 is clamped on the two radial protrusions U221.

Further preferably, the rotating shaft U22 may also be composed of a rotating rod U23 and a rotating sleeve U231 sleeved on the rotating rod U23, two symmetrical radial protrusions U221 are disposed on two sides of the outer surface of the rotating sleeve U231, the rotating spring U12 is clamped and hung on the two radial protrusions U221 of the rotating sleeve U231, and the composition form of the rotating shaft U22 is not fixed.

The lower extreme of rotatory spring U12 with shell cavity bottom joint or fixed connection, rotatory spring U12's upper end with pivot U22 joint or fixed connection, leave the interval between the spring line that rotatory spring U12 is adjacent, can drive when pivot U22 rotates rotatory upper end of rotatory spring U12, and the lower extreme is fixed to make rotatory spring U12 produce compression or extension effect, for example the pivot clockwise rotation is rotatory spring U12 compression, anticlockwise rotation makes rotatory spring U12 extend.

Therefore, the arrangement mode can drive the rotating shaft to do rotary motion by the driving motor, further drive the compression or expansion motion of the rotary spring, and the rotary spring is fixed in the shell cavity, so that the rotary spring can drive the lock tongue to move forwards and backwards along the axial direction of the rotating shaft.

Preferably, the rotary spring is selected to be a spring which can expand and contract bidirectionally, namely, a space is reserved between adjacent spring wires of the rotary spring U12, and the spring can be compressed due to the space, otherwise, the spring cannot be compressed if the space is not reserved.

Preferably, the length of the rotary spring in a natural state (i.e. no external force makes the rotary spring stretch or compress) is the length of the shell cavity, in this case, the rotary spring is beneficial to keep long-term working, the axial moving distance range of the lock tongue can be increased, when the rotary spring is compressed downwards from the natural state to be fully contracted, namely, close contact is formed between adjacent spring wires, the rotary spring is the maximum position of downward running of the lock tongue, and when the rotary spring is stretched upwards from the natural state of the rotary spring to the maximum deformation (if the maximum stretching deformation amount is exceeded, the spring cannot recover), the maximum position of upward running of the lock tongue is the moving space distance of the lock tongue. Therefore, the type of the rotary spring and the space length of the shell cavity can be reasonably selected according to the running distance range of the lock tongue.

Preferably, in practical application, a rotary spring without any interval between adjacent spring wires can be selected for use, and in this case, the rotary spring can only work in a stretched state, and only the stretching deformation is different. When the rotary spring is in a natural state, the rotary spring is exactly corresponding to the position of the lowest end of the lock tongue, namely the locking position, the rotary spring can be stretched by the rotary motion of the rotating shaft driven by the driving motor, and at the moment, the lock tongue moves upwards to unlock. This application allows the rotary spring to be always in a natural state in the locked state, while the rotary spring will always be in a stretched state after unlocking, and the running length of the locking bolt is equal to the maximum stretched length of the rotary spring. In practical application, the lock core in a general lockset is in a locking state for a long time, so that the rotary spring is in a natural state for a long time, the rotary spring is favorable for keeping good working characteristics, and the running length of the lock tongue is limited.

Preferably, the housing cavity U11 of the sliding housing U1 is divided into two chambers, which are an upper motor cavity U111 and a lower driving cavity U112, a hole U17 through which the rotating shaft U22 passes is formed in the bottom surface of the motor cavity U111, a hole U18 through which the rotating shaft U22 passes is also formed in the bottom surface of the driving cavity U112, and the motor cavity U111 provides protection for the driving motor U21.

Preferably, the motor assembly U2 further includes a speed reducer U24 connected to the driving motor U21, and the speed reducer U24 is connected to the rotating shaft U22 or the rotating rod U23.

Preferably, the output rotation speed of the driving motor U21 and thus the torque to the rotating shaft U22 can be adjusted by the decelerator U24.

Fig. 12 is an exploded view of the decelerator, and the decelerator U24 includes a plurality of support plates disposed in layers, gears engaged between the support plates to adjust a rotation speed ratio, and support columns to support the support plates, in combination with fig. 10 and 12. The driving motor U21 is connected with a first rotating gear L1, the first rotating gear L1 is in meshed connection with a first duplex gear L2, the first duplex gear L2 is in meshed connection with a second duplex gear L3, the second duplex gear L3 is in meshed connection with a third duplex gear L4, the third duplex gear L4 is in meshed connection with a fourth duplex gear L5, the fourth duplex gear L5 is in meshed connection with a second rotating gear L6, and the second rotating gear L6 is coaxially connected with the rotating shaft U22 or the rotating rod U23.

The multi-gear transmission arrangement form reduces the radius of gears, so that the available space is increased, and the multi-gear transmission arrangement form has the advantages of constant transmission ratio, high transmission efficiency, reliable and stable operation, strong bearing capacity, long service life and compact structure.

Preferably, the support plate comprises a first support plate B1, a second support plate B2 and a third support plate B3 are also arranged between the gears in a penetrating way, the arrangement of the first support plate B1, the second support plate B2 and the third support plate B3 bears the pressure, the motor assembly U2 is arranged in a layered mode and is subjected to structural grading treatment, direct contact of parts is avoided, friction loss is reduced, and the service life of the parts is prolonged.

Preferably, a plurality of first support columns Z1 for supporting are disposed between the first support plate B1 and the second support plate B2, and the first support columns Z1 may be in a column, a table, a prism, or the like, and the shapes, the numbers, and the setting positions may be four corners or diagonal, and in this embodiment, the first support columns Z1 are two and are disposed at diagonal corners of the second support plate B2. Likewise, the second support column Z2 is also disposed on the opposite angle of the third support plate B3, and the second support column Z2 is the same as the first support column Z1, which is not described herein again, and by setting the first support column Z1 and the second support column Z2, the motor assembly U2 can be given better support stability, and the structure is also clear, so that the later disassembly, assembly and maintenance and replacement of parts are facilitated.

Preferably, a plurality of small holes are formed in the first support plate B1, the second support plate B2 and the third support plate B3, the small holes can be connected and fixed with the support plates and the support columns, and can also be connected with the gears, meanwhile, the heat dissipation between the motor assembly parts can be quickened, the fault probability caused by friction heat generation between the motor assembly parts is greatly reduced, and the motor assembly work is effectively guaranteed.

Preferably, the driving motor U21 rotates positively and drives the rotating shaft U22, the rotating shaft U22 drives the first rotating gear L1 to rotate, the first rotating gear L1 then drives the first duplex gear L2 to rotate, the first duplex gear L2 drives the second duplex gear L3 to rotate, the second duplex gear L3 drives the third duplex gear L4 to rotate, the third duplex gear L4 drives the fourth duplex gear L5 to rotate, the fourth duplex gear L5 drives the second rotating gear L6 to rotate, the second rotating gear L6 starts to drive the rotating rod U23 to rotate, and the rotating rod U23 then drives the rotating sleeve U231 to rotate, because the rotating spring U12 is clamped on the radial protrusion U221, that is, the rotating sleeve U231 rotates and simultaneously drives the rotating spring U12 to rotate, and then compresses the rotating spring U12, and the compressing of the rotating spring U12 will squeeze the motor to enable the sliding shell U1 to rotate along the axis of the rotating rod U21.

When the driving motor U21 is reversed, the rotating rod U23 drives the rotating sleeve U231 to be reversed, the rotating sleeve U231 is reversed to drive the rotating spring U12, and the rotating spring U12 pushes the sliding shell U1 to move towards the driving motor U21.

Through this kind of setting can realize that driving motor rotates this sliding shell of drive and makes its axial along the pivot remove to through the corotation and the reversal of control driving motor, make the sliding shell can reciprocate, thereby make the spring bolt stretch into or stretch out the locked groove reaches intelligent convenient shutting or unblanking, easy operation, design benefit.

Preferably, as shown in fig. 13, the control module includes a control module circuit board C00, a processor chip C01 disposed on the control module circuit board C00, and a motor interface electrically connected to the processor chip C01, the motor interface being electrically connected to the driving motor through a cable, thereby controlling the driving motor to rotate forward or backward.

The processor chip C01 is electrically connected with the Bluetooth module C02 and the loudspeaker C03, and is also electrically connected with the 5-core communication interface C04, the two-core motor interface C05, the eight-core keyboard interface C06, the six-core power supply and the door magnetic interface C07. Through bluetooth module C02, the bluetooth information that is used for unblanking that the processor chip C01 can receive external equipment (for example cell-phone) transmitted, when the unlocking password information that contains in this bluetooth information is the same with the password in the lock, can unblank, otherwise can not unblank. The password in the lock can receive password setting information from the communication module through the 5-core communication interface C04, so that the password in the lock and the unlocking password can be dynamically updated, when a user needs to unlock, a request can be made to the control center through the mobile phone, when the control center recognizes that the mobile phone is a legal user, the password can be generated and sent to the mobile phone of the user and the communication module respectively, the communication module inputs the password into the processor chip of the control module to be used as the password in the lock, the mobile phone of the user inputs the password into the processor chip of the control module in a Bluetooth mode to be used as the unlocking password, and when the password in the lock and the unlocking password are identified as consistent after comparison and verification are carried out through the processor chip, the unlocking can be realized.

When unlocking is needed, the processor chip C01 controls the driving motor to rotate through the two-core motor interface C05 to unlock. The power supply and door magnet interface C07 comprises a power supply interface, i.e. a positive terminal and a negative terminal of a direct current power supply, through which a storage battery can be connected, and two wiring ports, by which the door magnet is induced to be in a closed state or an open state, and when the processor chip C01 is not controlling the motor to unlock through the motor interface C05, if the processor chip C01 detects that the door magnet is in the open state from the door magnet interface C07, it indicates that the lock may be in an illegal prized state, thereby controlling the speaker to emit an alarm sound, which corresponds to the aforementioned magnet sensor 35 and magnet 37, which will not be repeated here.

Preferably, the control module controls the time length of forward rotation and the time length of reverse rotation of the driving motor to be the same each time, and controls the deformation length of the rotary spring in the shell cavity from the first deformation state to the second deformation state to be the same as the deformation length of the rotary spring from the second deformation state to the first deformation state.

Preferably, the first deformation state is a free state of the rotary spring, the second deformation state is a maximum compression state of the rotary spring, or the first deformation state is a free state of the rotary spring, the second deformation state is a compression state of the rotary spring, or the first deformation state is a tension state of the rotary spring, the second deformation state is a maximum compression state of the rotary spring, or the first deformation state is a tension state of the rotary spring, and the second deformation state is a compression state of the rotary spring. The deformation length of the rotary spring in the two states is the same, namely, the accuracy of pushing control of the rotary spring to the sliding shell is maintained, the accurate control of the length of the moving path of the lock tongue is ensured, and the problems of power consumption increase, fault increase, short service life and the like caused by inconsistency of the deformation length are effectively solved.

Preferably, as shown in fig. 14, the communication module includes a communication circuit board T00, and a wireless communication chip T01 disposed on the communication circuit board T00, a SIM card holder T02 electrically connected to the wireless communication chip T01, a communication interface, and an antenna feeder socket T04, where the communication interface is correspondingly connected to the control module through a connection line.

The wireless communication chip T01 is also electrically connected with a 5-core communication interface T03. The 5-core communication interface T03 is correspondingly connected to a corresponding 5-core communication interface C04 on the control module through 5 connecting wires. Preferably, the wireless communication chip T01 is an NB-IoT module BC28, and the BC28 is encapsulated by LCC, so that the mobile communication terminal has the GSM/GPRS function in mobile communication, and can be rapidly and flexibly switched from a traditional 2G network to an NB-IoT network. In addition, the module has larger advantages in size, and an OTDOA positioning function is added.

Based on the embodiment, the invention discloses an adjustable protection well cover arranged in a well, which comprises a fence body arranged in the well, wherein the fence body comprises a drawing inner pipe and a drawing outer pipe which is sleeved on the drawing inner pipe and can move along the drawing inner pipe, a plurality of bearing pipes are arranged on the drawing outer pipe, branch holes for branch pipes to pass through are formed in the bearing pipes, and the plurality of branch pipes pass through the branch holes to connect the plurality of bearing pipes. The free end of the drawing inner pipe is provided with a hinge body, the adjustable protection well lid can be installed on the inner wall of the well through the hinge body, and the end part of the drawing outer pipe is provided with a lock for locking the adjustable protection well lid arranged in the well. This adjustable protection well lid that sets up in the well has adjustable support protection scope, and the dismouting maintenance of being convenient for and protection security performance is good advantage.

The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the present invention and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present invention.

Claims (4)

1. The adjustable protection well cover is arranged in a well and is characterized by comprising a fence body arranged in the well, wherein the fence body comprises a drawing inner pipe and a drawing outer pipe which is sleeved on the drawing inner pipe and can move along the drawing inner pipe, a plurality of bearing pipes are arranged on the drawing outer pipe, branch holes for branch pipes to pass through are formed in the bearing pipes, and the plurality of branch pipes pass through the branch holes to connect the plurality of bearing pipes; the free end of the drawing inner pipe is provided with a hinge body, the adjustable protection well cover can be installed on the inner wall of a well through the hinge body, and the end part of the drawing outer pipe is provided with a lock for locking the adjustable protection well cover arranged in the well; the drawing outer tube and the bearing tube are provided with a plurality of first fixing holes which correspond to each other in position and are used for fixedly combining the drawing outer tube and the bearing tube; the bearing pipe and the branch pipe are provided with a plurality of second fixing holes which correspond to each other in position and are used for fixedly combining the bearing pipe and the branch pipe; grooves are formed in the upper surface and/or the lower surface of the drawing inner tube along the axial direction of the drawing inner tube, and the first fixing holes are formed in the upper surface and/or the lower surface of the drawing outer tube and correspond to the grooves in position; the inner tube is provided with a first connecting ring, a second connecting ring and a connecting piece, two ends of the connecting piece are respectively connected with the first connecting ring and the second connecting ring, the inner tube is provided with a strip-shaped slideway hole, the first connecting ring passes through the slideway hole and is arranged in the inner tube, and the outer tube moves along the inner tube to drive the first connecting ring to move along the slideway hole; the hinge body comprises a hinge, a movable page of the hinge is connected with one exposed end of the drawing inner pipe, a fixed page of the hinge is connected with a first connector, and the first connector is connected with the inner wall of a well; the free end of the drawing outer tube is provided with a second connector for supporting the drawing outer tube, and the second connector is connected with the inner wall of the well; the lock comprises a lock shell and a lock core, wherein the lock shell and the lock core are arranged in the outer drawing tube, the lock core is arranged in the lock shell, the lock core comprises an outer lock core and an inner lock core which are matched together, a key hole for a key to be inserted and rotated is formed in a port of the inner lock core, a hole for exposing the port of the lock shell and the port of the inner lock core is formed in the upper surface of the outer drawing tube, a containing box is arranged below the lock shell, a storage battery and a lock tongue which stretches out and draws back along with the rotation of the inner lock core are arranged in the containing box, a lock tongue hole for the lock tongue to pass through is formed in the containing box, and a lock groove for the lock tongue to stretch in is formed in the second connector; when a key is inserted into the inner lock cylinder, the lock tongue penetrates through the lock tongue hole and stretches into the lock groove to complete locking; when a key is inserted into the inner lock cylinder to rotate, the lock tongue extends out of the lock groove to complete unlocking;

The lock comprises a drawing outer tube, a lock body, a holding box and a fixing clamp, and is characterized by further comprising the lock body and the holding box are fixed on the fixing clamp on the drawing outer tube, the fixing clamp comprises a first fixing clamp and a second fixing clamp, the first fixing clamp and the second fixing clamp are provided with everting openings, and the lock body, the holding box and the drawing outer tube are fixed together through the first fixing clamp and the second fixing clamp.

2. The adjustable protection well lid set in a well according to claim 1, wherein the accommodating box comprises a lock cavity and a battery cavity, the battery cavity is internally provided with the storage battery, the lock cavity is internally provided with an electronic lock cylinder, the electronic lock cylinder comprises a sliding shell, the sliding shell is connected with the lock tongue, the sliding shell is further connected with a motor component, a control module and a communication module for controlling the motor component are arranged on the side wall of the lock cavity, an in-lock password is set for the control module by the communication module receiving a signal from an internet of things platform, the control module is provided with a bluetooth module, when the control module is unlocked by the bluetooth module, the bluetooth module receives a bluetooth signal from a user communication terminal, the bluetooth signal comprises an unlocking password, the control module compares the unlocking password with the in-lock password, and if the unlocking password is the same, the control module controls the electronic lock cylinder to drive the lock tongue to leave the lock groove or the lock hole to finish.

3. The adjustable protective manhole cover disposed in a hoistway of claim 2, wherein the sliding housing has a housing cavity in which a rotary spring is disposed, the motor assembly includes a drive motor and a shaft, the drive motor is connected to the shaft, and the shaft penetrates the housing cavity and is sleeved with the rotary spring; when the driving motor rotates forwards or reversely, the rotating shaft rotates to drive the rotary spring to compress or stretch in a rotating mode, and the rotary spring compresses or stretches to deform to drive the sliding shell to move forwards and backwards along the axial direction of the rotating shaft.

4. The adjustable protective manhole cover according to claim 3, wherein the front and rear end surfaces of the accommodating box are provided with a first waterproof joint and a second waterproof joint, a magnet sensor is arranged in the second waterproof joint, the magnet sensor is electrically connected with the control module and corresponds to the magnet sensor, a magnet is arranged on the second connector, when the lock is illegally pried to be unlocked, a gap between the magnet sensor and the magnet exceeds a set gap, and the magnet sensor gives an alarm through the control module.