CN209779697U - Cable access well - Google Patents

Abstract

The utility model discloses a cable goes out well, it includes well lid, well head frame and the supplementary opening device of hydraulic pressure, the well lid articulates on the lateral wall of well head frame, the one end of the supplementary opening device of hydraulic pressure is articulated with the inside wall of well lid, the other end of the supplementary opening device of hydraulic pressure is articulated with the inside wall of well head frame, it has well lid strutting arrangement still to articulate on the inside wall of well head frame, install blocking device on the well lid, install on the inside wall of well head frame with blocking device complex locking portion. The utility model has the advantages that: after the cable enters and exits the well lid to be unlocked, the hydraulic auxiliary opening device can assist workers to open the well lid; the baffle is arranged, so that rainwater can be shielded, and the hinge is prevented from being corroded by the rainwater; the well lid and the well head frame are not provided with the lock holes, a mechanical key is not needed, the technical problem that the unlocking and locking device and the mechanical key in the prior art are various and are easy to lose is solved, and the whole device is low in maintenance cost and convenient to maintain.

Description

Cable access well

Technical Field

The utility model relates to a business turn over device of cable, especially cable go out and go into the well.

Background

The cable discrepancy well head uses to have keyhole lock body and steel material apron to make up and forms, receives the invasion and attack of sand blown by the wind throughout the year, and the keyhole very easily leads to blockking up, leads to the unable normal opening of cable discrepancy well head, and the personnel of patrolling and examining can't use, seriously influences the real-time business time of production, has increased the maintenance cost and the degree of difficulty, and former apron junction uses ordinary hinge very easily to rust to damage or drop, has seriously influenced the theftproof effect, endangers the safe economic stable operation of electric wire netting.

The well lid that current cable discrepancy well head used is combined material or steel manufacturing, device dead weight is overweight itself, it is very hard when patrolling and examining personnel or maintainer open, and can't stabilize fixedly after opening, take place danger very easily, original fixing device rusts easily, can't fix after rustting, cause the well lid to damage easily, the maintenance cost has been increased, the theftproof effect has seriously been influenced, endanger the safe economic stable operation of electric wire netting, and current cable discrepancy well head anti-theft device is half automatic, team member all need take loaded down with trivial details unlocking means when patrolling and examining the circuit, and unlocking means is many extremely easily lost, the maintenance cost is high, the business progress has seriously been influenced, and team member's work load has been increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's shortcoming, provide a long service life, easy maintenance and have the cable of theftproof function and go out the income well.

The purpose of the utility model is realized through the following technical scheme: the cable goes out and goes into the well, it includes the well lid, the supplementary opening device of well head frame and hydraulic pressure, the well lid articulates on the lateral wall of well head frame, the one end of the supplementary opening device of hydraulic pressure is articulated with the inside wall of well lid, the other end of the supplementary opening device of hydraulic pressure is articulated with the inside wall of well head frame, still articulated on the inside wall of well head frame have well lid strutting arrangement, install blocking device on the well lid, install on the inside wall of well head frame with blocking device complex locking portion.

Preferably, the hydraulic auxiliary opening device comprises a hydraulic cylinder and a hydraulic rod arranged on the hydraulic cylinder, the hydraulic cylinder is hinged to the inner side wall of the well lid, and the hydraulic rod is hinged to the inner side wall of the well lid frame.

preferably, install an at least truss on the inside wall of well lid, install the mounting bracket that corresponds with the truss on the well head frame inside wall, the pneumatic cylinder is articulated with the truss, and the hydraulic stem is articulated with the mounting bracket.

Preferably, a goat's horn fork is all installed to the hinged end of pneumatic cylinder and hydraulic stem, sets up the through-hole that the pivot passed on the goat's horn fork, all sets up the mounting hole that the pivot passed on tank tower and the mounting bracket, and corresponding mounting hole and goat's horn fork are passed in proper order to the one end of pivot, and the pivot passes through lock nut and locks.

Preferably, a pivot between the groove frame and the corresponding claw fork is provided with a limiting column, and a pivot between the mounting frame and the corresponding claw fork is also provided with a limiting column.

Preferably, well lid strutting arrangement includes bracing piece and stores pylon, installs the inside wall at the well lid on the stores pylon, and the one end of bracing piece is articulated with the inside wall of well head frame, and the other end of bracing piece is provided with the couple that articulates with the stores pylon.

Preferably, install the support frame on the inside wall of well head frame, seted up the hinge hole on the support frame, the hinged end of bracing piece is provided with the articulated shaft that penetrates in the hinge hole, still installs the rack that can place the bracing piece on the inside wall of well head frame, and the rack is located support frame one side, and the bracing piece is placed behind the rack, and the couple does not bulge the top edge of well head frame.

Preferably, install a plurality of mounting panels on the lateral wall of well head frame, the mounting panel is connected with the one end of hinge, and the other end and the well lid of hinge are connected, and the well lid is close to and installs a baffle on the lateral wall of hinge, and the baffle can rotate 90 at least relatively the hinge.

Preferably, the blocking device includes the motor cabinet, the bolt, connecting rod and profile of tooth axle, the motor cabinet is installed perpendicularly on the inside wall of well lid, install the motor in the motor cabinet and provide the battery of electric energy for the motor, install a carousel on the output shaft of motor, coaxial arrangement has the profile of tooth axle on the carousel, still install a guide block on the well lid, sliding fit has the bolt in the guide block, and the bolt is parallel with the well lid, the connecting rod is installed to the one end of bolt, set up the spur rack with the profile of tooth axle meshing on the connecting rod, the other end and the cooperation of locking portion of bolt.

preferably, the top of the toothed shaft is also provided with a hand wheel for rotating the toothed shaft.

The utility model has the advantages of it is following:

1. after the cable enters and exits the well lid and is unlocked, the hydraulic rod can apply a thrust to the well lid, so that workers can be assisted to open the well lid, the strength of the workers is reduced, and the problem that the well lid of the workers is difficult to open is solved;

2. Be provided with well lid strutting arrangement, open the back when the well lid, the accessible bracing piece supports to need not the staff and support the well lid again, thereby reduced staff's intensity, make the staff business turn over cable go in and out the well and go on in order.

3. Be provided with the baffle, can cover the rainwater, avoid the hinge to be corroded by the rainwater to guaranteed the life of hinge, and hydraulic pressure auxiliary opening device and well lid strutting arrangement all set up in the well, thereby guaranteed hydraulic pressure auxiliary opening device and well lid strutting arrangement's life.

4. The utility model discloses a blocking device all lies in the cable discrepancy well in, all does not set up the keyhole on well lid and well head frame, after well lid and well head frame shutting, the non-staff can't open the well lid to can play the theftproof effect.

5. The well lid is connected with the well head frame is articulated, and blocks the hinge through the baffle, has avoided non-staff to prize open the hinge and has made the problem that well lid and well head frame break away from, and further has played the theftproof effect.

6. The whole device does not need a mechanical key, solves the technical problems that the unlocking and locking device and the mechanical key in the prior art are various and are easy to lose, and is low in maintenance cost and convenient to maintain.

Drawings

Fig. 1 is a schematic view of the well lid closing structure of the utility model;

Fig. 2 is the utility model discloses a well lid structure schematic diagram of opening

FIG. 3 is a schematic view of the hydraulic cylinder and hydraulic rod articulation;

FIG. 4 is a schematic structural view of the manhole cover;

FIG. 5 is a schematic diagram of a wellhead housing;

FIG. 6 is a schematic view of the attachment of the connecting rod;

FIG. 7 is a schematic receiving view of a spur rack meshing with a toothed shaft;

In the figure: 1-well lid, 2-well mouth rack, 3-groove rack, 4-mounting hole, 5-hydraulic cylinder, 6-hydraulic rod, 7-mounting rack, 8-hinge, 9-mounting board, 10-baffle, 11-claw fork, 12-spacing column, 13-pivot, 14-locking nut, 15-support rod, 16-hanging rack, 17-hook, 18-hinge shaft, 19-support rack, 20-placing rack, 21-hydraulic auxiliary opening device, 22-well lid supporting device, 31-motor base, 32-rotary table, 33-toothed shaft, 34-hand wheel, 35-connecting rod, 36-bolt, 37-spur rack, 38-locking part and 39-guide block.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the utility model is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

in the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

as shown in fig. 1 ~ fig. 5, the cable goes out and goes into the well, it includes well lid 1, well head frame 2 and the supplementary opening device 21 of hydraulic pressure, well head frame 2 is installed at the well head that the cable goes out and goes into the well, be provided with the fixed plate on well head frame 2's lateral wall all around, be provided with the waist shape hole of construction bolt on the fixed plate, during installation well head frame 2, wear the bolt in waist shape downthehole, then lock through the nut, just can realize well head frame 2's installation, as for the installation of bolt, can bury underground in advance, then the mode of concreting is installed.

In this embodiment, as shown in fig. 1 and fig. 2, well lid 1 articulates on well head frame 2's lateral wall, it is further, as shown in fig. 5, install a plurality of mounting panels 9 on well head frame 2's the lateral wall, mounting panel 9 is connected with hinge 8's one end, hinge 8's the other end is connected with well lid 1, thereby make well lid 1 can rotate for relative well head frame 2 of pivot with hinge 8's pivot, thereby open well lid 1, it is further, install joint strip in the region of well lid 1 with well head frame 2 laminating, joint strip can prevent that water liquid from entering into in the cable discrepancy well, and well lid 1 and well head frame 2 noise because of rigid contact caused still can be avoided, the problem of derusting.

In this embodiment, a baffle 10 is installed on the lateral wall that well lid 1 is close to hinge 8, and baffle 10 can rotate 90 relatively hinge 8 at least, and baffle 10 can shelter from the rainwater to avoid hinge 8 to be corroded by the rainwater for a long time and cause hinge 8 card to die and damage, guaranteed hinge 8's life and active nature, thereby make well lid 1 can rotate relatively wellhead rack 2.

in this embodiment, as shown in fig. 1, fig. 2 and fig. 3, one end of the hydraulic auxiliary opening device 21 is hinged to the inner side wall of the well lid 1, the other end of the hydraulic auxiliary opening device 21 is hinged to the inner side wall of the well head frame 2, further, the hydraulic auxiliary opening device 21 comprises a hydraulic cylinder 5 and a hydraulic rod 6 mounted on the hydraulic cylinder 5, the hydraulic cylinder 5 is hinged to the inner side wall of the well lid 1, the hydraulic rod 6 is hinged to the inner side wall of the well head frame 2, further, at least one slot frame 3 is mounted on the inner side wall of the well lid 1, a mounting frame 7 corresponding to the slot frame 3 is mounted on the inner side wall of the well head frame 2, the hydraulic cylinder 5 is hinged to the slot frame 3, the hydraulic rod 6 is hinged to the mounting frame 7, preferably, a goat's horn fork 11 is mounted at the hinged end of the hydraulic cylinder 5 and the hydraulic rod 6, a through hole through which the pivot 13 passes is formed in the goat, the one end of pivot 13 passes corresponding mounting hole 4 and goat's horn fork 11 in proper order, and pivot 13 passes through lock nut 14 locking, pneumatic cylinder 5 is the same with hydraulic stem 6's articulated mode, when pneumatic cylinder 5 during operation, hydraulic stem 6 stretches out, thereby make well lid 1 receive an ascending thrust, thereby make well lid 1 open, after well lid 1 opens, the personnel of uncapping exert an external force to well lid 1 again, thereby make well lid 1 open completely, in this embodiment, when well lid 1 covers, pneumatic cylinder 5 is in compression state, consequently when well lid 1 drops with well head frame 2, hydraulic stem 6 can be automatic stretch out.

In this embodiment, as shown in fig. 3, a pivot 13 between the trough rack 3 and the corresponding goat's horn fork 11 is provided with a limiting post 12, the pivot 13 between the mounting rack 7 and the corresponding goat's horn fork 11 is also provided with a limiting post 12, further, the trough rack 3 and the mounting rack 7 are on the same axis, by adjusting the limiting post 12, the axis of the hydraulic cylinder 5 and the axes of the trough rack 3 and the mounting rack 7 can be on the same plane, so as to better open the manhole cover 1, further, the trough rack 3 is two, and is symmetrically installed on the inner side wall of the manhole cover 1, so as to make the hydraulic cylinders 5 two sets, by two sets of symmetrically arranged hydraulic cylinders 5, so as to make the opening of the manhole cover 1 more convenient, the trough rack 3 is provided with a plurality of uniformly distributed mounting holes 4, by adjusting the positions of the hydraulic cylinders 5 in the mounting holes 4, so as to change the rebound force of the hydraulic rod 6 after being compressed, thereby can be according to actual conditions, the position of reasonable rotary hydraulic cylinder 5 on truss 3 to open under the effect of pneumatic cylinder 5 that well lid 1 can be better.

In this embodiment, as shown in fig. 2, a well lid supporting device 22 is hinged on the inner side wall of the well lid frame 2, the well lid supporting device 22 includes a supporting rod 15 and a hanging frame 16, the inner side wall of the well lid 1 is installed on the hanging frame 16, one end of the supporting rod 15 is hinged with the inner side wall of the well lid frame 2, the other end of the supporting rod 15 is provided with a hook 17 hooked with the hanging frame 16, the hanging frame 16 is provided with a hanging hole hooked with the hook 17, further, a supporting frame 19 is installed on the inner side wall of the well lid frame 2, a hinge hole is opened on the supporting frame 19, a hinge shaft 18 penetrating into the hinge hole is arranged at the hinge end of the supporting rod 15, the hinge shaft 18 can freely rotate in the hinge hole, in order to prevent the hinge shaft 18 from separating from the hinge hole, a stopping pin can be installed on the hinge shaft 18 penetrating through, Well head frame 2 and bracing piece 15 are the triangle-shaped state to well lid 1's rigidity need not the staff and makes power again and keep well lid 1 to open, has reduced staff's intensity, and can guarantee that the orderly cable of advancing or going out of staff goes into the well.

In this embodiment, as shown in fig. 2, still install the rack 20 that can place bracing piece 15 on the inside wall of well head frame 2, and rack 20 is located support frame 19 one side, bracing piece 15 is placed behind rack 20, couple 17 does not bulge well head frame 2's upper edge, thereby guarantee the leakproofness that well lid 1 and well head frame 2 closed the lid, when needs close the lid, break away from hanger 16 with couple 17, thereby make bracing piece 15 can rotate by well head frame 2 relatively, then place bracing piece 15 on rack 20, thereby make bracing piece 15 be difficult for dropping, and can not interfere the staff and enter or go out the cable and go out into the well.

In this embodiment, as shown in fig. 6 and 7, the locking device 30 includes a motor base 31, a latch 36, a connecting rod 35 and a toothed shaft 33, the motor base 31 is vertically installed on the inner side wall of the manhole cover 1, a motor and a storage battery for supplying electric power to the motor are installed in the motor base 31, the storage battery can supply electric power to the motor, the storage battery is a rechargeable battery, when the storage battery has no electric power, the storage battery can be charged to store electric power, the motor is provided with a signal receiver, the signal receiver can control the conduction between the storage battery and the motor, when the manhole cover 1 is closed and locked with the manhole frame 2, an external operator only needs to send an instruction of the motor operation to the signal receiver through a signal sending device, when the signal receiver receives the instruction, the motor starts to operate, further, as shown in fig. 6 and 7, a rotary disc 32 is installed on an output shaft of the motor, the rotary table 32 is coaxially provided with a toothed shaft 33, the well lid 1 is further provided with a guide block 39, a bolt 36 is arranged in the guide block 39 in a sliding fit mode, the bolt 36 is parallel to the well lid 1, one end of the bolt 36 is provided with a connecting rod 35, the connecting rod 35 is provided with a spur rack 37 meshed with the toothed shaft 33, when a motor works, the rotary table 32 and the toothed shaft 33 are driven to rotate, the bolt 36 is meshed with the spur rack 37 through the toothed shaft 33, linear motion of the bolt 36 is achieved, further, a locking portion 38 matched with the bolt 36 is arranged on the side wall of the well head frame 2, the locking portion 38 can be a flat plate parallel to the well lid 1, the front end of the bolt 36 is located on the lower surface of the flat plate, when the bolt 36 is located below the flat plate, the flat plate blocks the bolt 36, the well lid 1 cannot rotate relative to the well head frame 2, locking of the well lid 1 is achieved, and non-working personnel cannot open the, thereby can avoid non-staff to open 1 steal the cable etc. of cable discrepancy in the well of well lid, thereby the theftproof effect has been played, and because motor cabinet 31 sets up on the inside wall of well lid 1, whole blocking device need not to set up the keyhole and be equipped with mechanical key, thereby when making team member overhaul, switching lock device and mechanical key need not to take, the problem of losing very easily of blocking device and mechanical key kind in the prior art has been solved, and whole device is located in the cable discrepancy in the well, do not blown the sun, therefore long service life, but the work load that cost and team personnel overhauld.

Certainly, locking portion 38 not only can be dull and stereotyped, and locking portion 38 is opened and to be a locking block, seted up on the locking block with 36 complex spacing holes of bolt, when well lid 1 is in the shutting state, bolt 36 is located spacing downthehole to make well lid 1 can't be opened, when bolt 36 withdrawed from spacing hole under the effect of motor, well lid 1 can be opened this moment.

In this embodiment, as shown in fig. 6, a hand wheel 34 convenient for rotating the toothed shaft 33 is further disposed at the top of the toothed shaft 33, when a worker is located in the well, if there is no signal sending device, the hand wheel 34 can be rotated by the worker to rotate the toothed shaft 33, so that the bolt 36 is separated from the locking portion 38, the worker can open the well lid 1 conveniently from the well, and the technical problem that the worker cannot open the well lid 1 in the well is solved.

In this embodiment, as shown in fig. 6, motor cabinet 31 is a barrel, has seted up evenly distributed's locking screw on the same circumference of motor cabinet 31, locking screw female fit has fastening motor's locking screw, it is firm to make the motor installation through locking screw, and after the motor installation was accomplished, the motor did not form confined cavity with motor cabinet 31, a plurality of gaps have, thereby can avoid the problem emergence that signal receiver can not receive the signal behind motor and the formation shield of motor cabinet 31.

The working process of the utility model is as follows: an external worker sends an opening or locking instruction through a signal sending device, a signal receiver on the motor receives the signal and then conducts the motor with a storage battery, when the well lid 1 needs to be opened, the motor works in the forward direction to drive the toothed shaft 33 to rotate, the bolt 36 is separated from the locking part 38, after the bolt 36 is separated from the locking part 38, the hydraulic rod 6 extends out, so that the well lid 1 rotates around the hinge 8, the well lid 1 and the well head frame 2 are opened, then the external worker applies a thrust force to the well lid 1 again, so that the well lid 1 is completely opened, after the well lid 1 is opened, the hook 17 on the supporting rod 15 is hung on the hanging frame 16, so that the well lid 1, the well head frame 2 and the supporting rod 15 are in a triangular state, the position of the well lid 1 is ensured to be fixed, therefore, the worker can orderly enter and exit cables, when the well lid 1 needs to be closed, the hook 17 of the, then well lid 1 begins slowly closed under gravity and the supplementary opening device's of hydraulic pressure effect again, then the staff exerts an external force to well lid 1, make well lid 1 and well head frame 2 closed completely, at this moment, send the instruction of a locking closure with signalling equipment, after signal receiver received this signal, the motor reverse work, thereby make bolt 36 cooperation in locking portion 38, realize the locking of well lid 1, when the cable has the staff to come out in and out of the well, personnel only need rotate hand wheel 34 in the well, just can realize that bolt 36 breaks away from locking portion 38 or bolt 36 cooperation is in locking portion 38, realize opening or locking closure of well lid 1.

Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims (10)

1. The well is gone into to cable, its characterized in that: it includes well lid (1), well head frame (2) and the supplementary opening device of hydraulic pressure (21), well lid (1) articulates on the lateral wall of well head frame (2), the one end of the supplementary opening device of hydraulic pressure (21) with the inside wall of well lid (1) is articulated, the other end of the supplementary opening device of hydraulic pressure (21) with the inside wall of well head frame (2) is articulated, it has well lid strutting arrangement (22) still to articulate on the inside wall of well head frame (2), install blocking device (30) on well lid (1), install on the inside wall of well head frame (2) with blocking device (30) complex locking portion (38).

2. A wireline access well according to claim 1, wherein: the hydraulic auxiliary opening device (21) comprises a hydraulic cylinder (5) and a hydraulic rod (6) installed on the hydraulic cylinder (5), the hydraulic cylinder (5) is hinged to the inner side wall of the well lid (1), and the hydraulic rod (6) is hinged to the inner side wall of the well head frame (2).

3. A wireline access well according to claim 2, wherein: install an at least truss (3) on the inside wall of well lid (1), install on well head frame (2) inside wall with mounting bracket (7) that truss (3) correspond, pneumatic cylinder (5) with truss (3) are articulated, hydraulic stem (6) with mounting bracket (7) are articulated.

4. A wireline access well according to claim 3, wherein: a goat's horn fork (11) is all installed to the hinged end of pneumatic cylinder (5) and hydraulic stem (6), set up the through-hole that pivot (13) passed on goat's horn fork (11), truss (3) and all set up mounting hole (4) that pivot (13) passed on mounting bracket (7), the one end of pivot (13) is passed in proper order and is corresponded mounting hole (4) with goat's horn fork (11), just pivot (13) are locked through lock nut (14).

5. a cable entry well according to claim 4 wherein: be located truss (3) and corresponding install spacing post (12) on pivot (13) between goat's horn fork (11), be located mounting bracket (7) and corresponding also install spacing post (12) on pivot (13) between goat's horn fork (11).

6. A wireline access well according to claim 1, wherein: well lid strutting arrangement (22) are including bracing piece (15) and stores pylon (16), install on stores pylon (16) the inside wall of well lid (1), the one end of bracing piece (15) with the inside wall of well head frame (2) is articulated, the other end of bracing piece (15) be provided with couple (17) that stores pylon (16) articulated.

7. A wireline access well according to claim 6, wherein: install support frame (19) on the inside wall of wellhead frame (2), the hinge hole has been seted up on support frame (19), the hinged end of bracing piece (15) is provided with articulated shaft (18) that penetrates in the hinge hole, still install rack (20) that can place bracing piece (15) on the inside wall of wellhead frame (2), just rack (20) are located support frame (19) one side, place behind rack (20) bracing piece (15), couple (17) do not protrude the top edge of wellhead frame (2).

8. A wireline access well according to claim 1, wherein: install a plurality of mounting panels (9) on the lateral wall of well head frame (2), mounting panel (9) are connected with the one end of hinge (8), the other end of hinge (8) with well lid (1) are connected, well lid (1) are close to install a baffle (10) on the lateral wall of hinge (8), just baffle (10) can be relative hinge (8) rotate 90 at least.

9. A wireline access well according to claim 1, wherein: the locking device (30) comprises a motor base (31), a bolt (36), a connecting rod (35) and a toothed shaft (33), the motor base (31) is vertically arranged on the inner side wall of the well lid (1), a motor and a storage battery for providing electric energy for the motor are arranged in the motor base (31), a rotary disc (32) is arranged on an output shaft of the motor, the toothed shaft (33) is coaxially arranged on the rotary disc (32), the well lid (1) is also provided with a guide block (39), the guide block (39) is internally matched with the bolt (36) in a sliding way, the bolt (36) is parallel to the well lid (1), one end of the bolt (36) is provided with a connecting rod (35), the connecting rod (35) is provided with a spur rack (37) meshed with the toothed shaft (33), and the other end of the bolt (36) is matched with the locking part (38).

10. A wireline access well according to claim 9, wherein: the top of the toothed shaft (33) is also provided with a hand wheel (34) which is convenient for rotating the toothed shaft (33).