CN115367324B

CN115367324B - Translation type visible manhole cover device

Info

Publication number: CN115367324B
Application number: CN202210854286.4A
Authority: CN
Inventors: 何成达
Original assignee: Yangchun Zhongju Machinery Technology Co ltd
Current assignee: Yangchun Zhongju Machinery Technology Co ltd
Priority date: 2022-07-14
Filing date: 2022-07-14
Publication date: 2023-04-11
Anticipated expiration: 2042-07-14
Also published as: CN115367324A

Abstract

The invention relates to a manhole cover technology, which is used for solving the problems that a manhole cover is too hard to open in a flip mode and the manhole cover is possibly closed by external personnel during operation, in particular to a translation type visible manhole cover device; according to the manhole cover opening and closing device, the manhole cover is moved horizontally, so that the phenomenon that the manhole cover is too laborious to turn is avoided, the opening and closing efficiency of the manhole cover is improved, the load borne by a rotating shaft of the manhole cover is reduced, the service life of parts of the manhole cover is prolonged, the pedal capable of descending is arranged at the manhole cover, a worker can enter from a manhole more conveniently, the safety pin can be ejected out through the prying bar and the safety mechanism, the upper cover connecting rod cannot be attached to the base connecting rod, the problem that when the worker works in the tank body is avoided, the worker mistakenly closes the manhole cover is solved, and the worker is prevented from being in danger.

Description

Translation type visible manhole cover device

Technical Field

The invention relates to a manhole cover technology, in particular to a translation type visible manhole cover device.

Background

Manholes, which are typically openings for maintenance in tanks, sewers or ships, use appropriately shaped manhole covers above the openings to close the manholes and allow access to the manholes when maintenance is required. The manhole cover is usually formed by a frame, generally made of cast iron, placed to press against the opening of the manhole, i.e. the manhole cover presses against the manhole frame in order to achieve a closing action on the manhole cover.

At present, current manhole cover still has the weak point, most manhole covers all adopt flip's mode, but because the manhole cover adopts metals such as iron to make, density is big, manhole cover thickness is big in addition, make the weight of manhole cover generally very big, therefore the staff is very hard when opening through flip's mode, the manhole cover of flip form is opening the back simultaneously, generally all leans on aside, when the staff gets into inside when overhauing, easily closed the manhole cover by the outside personnel mistake that lacks the communication, thereby cause danger.

In view of the above technical problem, the present application proposes a solution.

Disclosure of Invention

According to the invention, the manhole cover is horizontally moved, so that the phenomenon that the manhole cover is too laborious to turn is avoided, the opening and closing efficiency of the manhole cover is improved, the load borne by the rotating shaft of the manhole cover is reduced, the service life of parts of the manhole cover is prolonged, the pedal capable of descending is arranged at the manhole cover, so that workers can enter from a manhole more conveniently, the safety pin can be ejected out through the prying bar and the safety mechanism, the upper cover connecting rod cannot be attached to the base connecting rod, the problem that when the workers operate in the tank body, the workers mistakenly close the manhole cover is avoided, the workers are prevented from being in danger, the problems that the manhole cover is too laborious to open in a flip mode and the manhole cover is possibly closed by the external workers during operation are solved, and the translation type visual manhole cover device is provided.

The purpose of the invention can be realized by the following technical scheme:

a translational visual manhole cover device comprises a manhole column, wherein a flange plate is mounted at the top end of the manhole column, the upper surface of the flange plate is abutted with a manhole upper cover, a base connecting rod is fixedly mounted on the side wall of the manhole column, a rotating base is fixedly mounted at the outer end of the base connecting rod, and a rotating guide pillar is rotatably connected to the upper surface of the outer end of the rotating base;

an upper cover connecting rod is fixedly installed at the bottom of the side wall of the rotary guide pillar, one end, far away from the rotary guide pillar, of the upper cover connecting rod is fixedly connected with the outer wall of the manhole upper cover, a reinforcing rib is fixedly installed on the side wall of the rotary guide pillar, two ends of the reinforcing rib are respectively connected to the upper surfaces of the side wall of the rotary guide pillar and the manhole upper cover, a ball head handle is fixedly installed at the top end of the rotary guide pillar and perpendicular to the axis of the rotary guide pillar, a hole is formed in the center of the manhole upper cover, a glass sight glass is fixedly installed above the hole on the upper surface of the manhole upper cover, glass is fixedly installed in the center of the glass sight glass, a handle is fixedly installed on one side, far away from the rotary guide pillar, of the manhole upper cover side wall is in an annular array and is provided with a plurality of groups of positioning grooves, a shaft pin is rotatably connected to the bottom of a flange plate at the top end of the manhole column, a hanging ring screw is clamped and connected to the positioning groove, a butterfly nut is fixedly installed at the top of the hanging ring screw, a pedal is arranged in the manhole column, and a safety structure is arranged below the base connecting rod;

the manhole column is fixedly arranged on the industrial tank body, the mounting angle of the manhole column forms a 20-degree included angle in the horizontal direction, the rotating guide column also forms a 20-degree included angle in the manhole upper cover, and the rotating guide column is in a vertically downward state.

As a preferred embodiment of the present invention, the inner wall of the manhole column is provided with an annular groove, the annular groove is connected with a lifting ring in a sliding manner, the pedals are fixedly mounted on the side wall of the lifting ring, a plurality of groups of the pedals are annularly distributed on the inner side of the lifting ring, at least two groups of the lifting rings are vertically distributed in the manhole column, and the pedals on the inner wall of the plurality of groups of the lifting rings are arranged in a staggered manner.

As a preferred embodiment of the present invention, an assembly plate is fixedly installed on an outer wall of the lifting ring, the assembly plate is slidably connected inside the manhole column, a pry bar is rotatably connected to a top of the assembly plate, a rotating seat is fixedly installed at a bottom of the base connecting rod, an axis of the rotating seat is rotatably connected to a middle portion of the pry bar through a rotating shaft, and one end of the pry bar, which is far away from the assembly plate, is rotatably connected to the safety structure.

As a preferred embodiment of the present invention, the safety structure below the base connecting rod includes a safety pin, a limiting rod, a bidirectional cam, a knob, a limiting groove, a stop plate connecting plate, a limiting spring and a shift lever, wherein one end of the prying rod, which is away from the assembling plate, is rotatably connected with a rotating rod, the rotating rod penetrates through the bottom of the safety pin, the safety pin is inserted into the base connecting rod, two sides of the safety pin are fixedly provided with a latch, the inside of the base connecting rod is horizontally and slidably connected with a stop plate and a connecting plate, the outer wall of the stop plate, which faces the side of the safety pin, is fixedly provided with a latch, the safety pin and the stop plate are connected through the latch, the stop plate and the connecting plate are fixedly connected, a gap is left between the stop plate and the connecting plate, the lower surface of the base connecting rod is fixedly provided with a limiting groove, the limiting rod is slidably connected into the limiting groove, the cross section of the limiting rod is in a J-shaped, one end of the limiting rod is slidably connected into the limiting groove through a T-shaped groove, the other end of the limiting rod abuts against the outer wall of the bidirectional cam, the bidirectional cam is rotatably connected to the bottom of the base connecting rod, the outer wall of the bidirectional cam is fixedly provided with a knob, and a shift lever are fixedly provided between the stop plate.

As a preferred embodiment of the present invention, the outer wall of the connecting plate is fixedly connected with a limiting spring, and one end of the limiting spring, which is far away from the connecting plate, is fixedly connected to the inner wall of the base connecting rod.

As a preferred embodiment of the present invention, a plurality of sets of return springs are fixedly installed at the bottom of the lifting ring, the bottom ends of the return springs are fixedly connected in an annular groove inside the manhole column, a plurality of sets of limit springs are annularly distributed below the lifting ring, and the positions of the return springs and the pedals are the same.

In a preferred embodiment of the present invention, the latch of the safety pin outer wall is opposite to the latch of the non-return plate outer wall, and the cross section of the latch of the non-return plate outer wall is an inverted triangle

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the manhole cover is horizontally moved, so that the phenomenon that the manhole cover is too laborious to turn is avoided, the opening and closing efficiency of the manhole cover is improved, the load borne by the rotating shaft of the manhole cover is reduced, and the service life of the manhole cover component is prolonged.

2. According to the manhole cover, the pedal capable of descending is arranged at the manhole cover, so that a worker can enter the manhole more conveniently, the safety pin can be ejected out through the prying bar and the safety mechanism, the upper cover connecting rod cannot be attached to the base connecting rod, the problem that when the worker works in the tank body, external workers mistakenly close the manhole cover is avoided, and the worker is prevented from being in danger is solved.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic front view of the structure of the present invention;

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is a schematic view of the safety structure of the present invention;

FIG. 4 is an enlarged schematic view of the portion A in FIG. 3 according to the present invention;

FIG. 5 is a schematic view of the structure of the assembled board of the present invention;

FIG. 6 is an enlarged view of the structure at B in FIG. 5 according to the present invention;

FIG. 7 is a schematic view of a spacing pin according to the present invention;

FIG. 8 is an enlarged view of the structure of FIG. 7 at C;

fig. 9 is a schematic diagram of a ratchet structure of the present invention.

In the figure: 1. a manhole column; 2. rotating the guide post; 3. a ball head handle; 4. a manhole upper cover; 5. a glass sight glass; 6. an upper cover connecting rod; 7. a base connecting rod; 8. positioning a groove; 9. rotating the base; 10. a handle; 11. A lifting ring screw; 12. a pedal; 13. a pry bar; 14. rotating the rod; 15. a safety pin; 16. a limiting rod; 17. a bidirectional cam; 18. a knob; 19. a limiting groove; 20. assembling a plate; 21. a lifting ring; 22. a return spring; 23. a backstop plate; 24. a connecting plate; 25. a limiting spring; 26. a rotating seat; 27. a deflector rod.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

most manhole covers are made of metal such as iron, the density is high, and the thickness of the manhole cover is large, so that the weight of the manhole cover is generally very large, and therefore, a worker is very hard to open the manhole cover in a flip manner.

Referring to fig. 1-4, a translational type visible manhole cover device includes a manhole column 1, the manhole column 1 is installed in a place where a manhole is needed, such as a tank, a sewer or a ship, etc., an installation angle of the manhole column 1 forms a 20 ° included angle with the horizontal plane, an included angle of 20 ° is also formed between a rotary guide column 2 and a manhole upper cover 4, the rotary guide column 2 is in a vertically downward state, a flange is installed at the top end of the manhole column 1, the upper surface of the flange abuts against the manhole upper cover 4, the manhole upper cover 4 is arc-shaped, a base connecting rod 7 is fixedly installed on the side wall of the manhole column 1, a rotary base 9 is fixedly installed at the outer end of the base connecting rod 7, the upper surface of the outer end of the rotary base 9 is rotatably connected with the rotary guide column 2, and the rotary guide column 2 can rotate on the rotary base 9;

fixed mounting has upper cover connecting rod 6 bottom the 2 lateral walls of rotatory guide pillar, upper cover connecting rod 6 keeps away from the one end and 4 outer wall fixed connection of rotatory guide pillar 2 and manhole upper cover, it drives upper cover connecting rod 6 and 4 rotations of manhole upper cover to rotate through rotatory guide pillar 2, 2 lateral walls fixed mounting of rotatory guide pillar has the strengthening rib, the strengthening rib both ends are connected respectively at rotatory guide pillar 2 lateral walls and 4 upper surfaces of manhole upper cover, increase the structural strength between rotatory guide pillar 2 and manhole upper cover 4, 2 top fixed mounting of rotatory guide pillar has bulb handle 3, bulb handle 3 is perpendicular to rotatory guide pillar 2 axis, drive rotatory guide pillar 2 through rotating bulb handle 3 and rotate, manhole upper cover 4 center department sets up porosely, manhole upper cover 4 upper surface is located this hole top fixed mounting has glass sight glass 5, glass 5 center department fixed mounting has glass, can observe the inside condition under the circumstances of not opening the manhole cover through glass sight glass 5, one side fixed mounting that manhole upper cover 4 kept away from rotatory guide pillar 2 has handle 10, manhole upper cover 4 lateral walls are ring array and has seted up multiunit constant head tank 8, the ring flange bottom of ring array has been connected with the ring bolt, ring bolt is provided with ring bolt 11, ring bolt 11 is convenient for the top to ring bolt and ring bolt, ring bolt is provided with ring bolt 11, ring bolt 11 internal mounting is provided with ring bolt.

When opening manhole upper cover 4, through rotating butterfly nut to drive rings screw 11 and rotate, rings screw 11 breaks away from constant head tank 8, then through rotating bulb handle 3, drives manhole upper cover 4 translation through upper cover connecting rod 6 and strengthening rib, thereby opens the manhole, and the mode of opening of translation can make the workman more laborsaving when opening, also more saves space simultaneously.

Example two:

the cover of a flip cover is generally leaned aside after being opened, and when workers enter the interior for maintenance, the cover is easily closed by mistake by an external person lacking communication, so that danger is caused.

Referring to fig. 5-9, an annular groove is formed in an inner wall of a manhole column 1, a lifting ring 21 is slidably connected to the inner wall of the annular groove, the lifting ring 21 can move up and down in the annular groove, pedals 12 are fixedly mounted on a side wall of the lifting ring 21 for a worker to step on when entering, a plurality of groups of pedals 12 are annularly distributed on the inner side of the lifting ring 21, at least two groups of lifting rings 21 are vertically distributed in the manhole column 1, the pedals 12 on the inner wall of the groups of lifting rings 21 are staggered, so that the worker can enter the manhole column 1, an assembling plate 20 is fixedly mounted on an outer wall of the lifting ring 21, the groups of lifting rings 21 are connected into a whole by the assembling plate 20, the assembling plate 20 is slidably connected to the inner part of the manhole column 1, so that the assembling plate 20 can move together with the lifting rings 21, a pry bar 13 is rotatably connected to the top of the assembling plate 20, and a rotating base 26 is fixedly mounted at the bottom of a base connecting rod 7, the axle center of the rotating seat 26 is rotatably connected with the middle part of the pry bar 13 through a rotating shaft, so that the assembling plate 20 can drive the pry bar 13 to rotate when lifting, one end of the pry bar 13, which is far away from the assembling plate 20, is rotatably connected with the safety structure, two ends of the pry bar 13 are provided with notches with certain lengths, when the pry bar 13 is connected with the assembling plate 20 and the safety structure, the rotating shaft at the connection part can rotate and translate in the notches, so as to compensate the influence caused by different movement tracks, the safety structure below the base connecting rod 7 comprises a safety pin 15, a limiting rod 16, a bidirectional cam 17, a knob 18, a limiting groove 19, a non-return plate 23 connecting plate 24, a limiting spring 25 and a shifting lever 27, one end of the pry bar 13, which is far away from the assembling plate 20, is rotatably connected with a rotating rod 14, the rotating rod 14 can rotate and slide in the pry bar 13, the rotating rod 14 penetrates through the bottom of the safety pin 15, and the safety pin 15 is inserted into the base connecting rod 7, therefore, the safety pin 15 is driven to move up and down through the movement of the prying rod 13, the latch teeth are fixedly arranged on two sides of the safety pin 15, the check plate 23 and the connecting plate 24 are connected inside the base connecting rod 7 in a sliding manner along the horizontal direction, the latch teeth of the outer wall of the safety pin 15 are connected with the check plate 23 in a latching manner, the latch teeth of the outer wall of the safety pin 15 are opposite to the latch teeth of the outer wall of the check plate 23 in direction, the cross section of the latch teeth of the outer wall of the check plate 23 is in an inverted triangle shape, the latch teeth of the outer wall of the safety pin 15 move upwards through the structure, the inclined planes between the two sets of latch teeth are extruded, the safety pin 15 pushes the check plate 23 open to ascend, when the safety pin 15 descends, the horizontal planes between the two sets of latch teeth are extruded, the safety pin 15 cannot push the check plate 23 open, the limiting effect on the safety pin 15 is realized, and the check plate 23 is fixedly connected with the connecting plate 24, a gap is reserved between the check plate 23 and the connecting plate 24 and is used for being connected with the shift lever 27, the lower surface of the base connecting rod 7 is fixedly provided with a limiting groove 19, the cross section of the limiting groove 19 is C-shaped, the cross section of the limiting rod 16 is J-shaped, one end of the limiting rod 16 is connected inside the limiting groove 19 in a sliding mode through a T-shaped groove, so that the limiting rod 16 keeps horizontal translation, the other end of the limiting rod 16 is abutted against the outer wall of the bidirectional cam 17, the limiting rod 16 is driven to expand towards two sides through the rotation of the bidirectional cam 17 when the long shaft of the bidirectional cam 17 is contacted with the limiting rod 16, the limiting rod 16 is pushed towards the middle through the check plate 23 and the connecting plate 24 through the shift lever 27 when the short shaft of the bidirectional cam 17 is contacted with the limiting rod 16, the bidirectional cam 17 is rotatably connected to the bottom of the base connecting rod 7, the outer wall of the bidirectional cam 17 is fixedly provided with a knob 18, the bidirectional cam 17 is driven to rotate through the knob 18, the shift lever 27 is fixedly arranged on the upper surface of the limiting rod 16, the deflector rod 27 is inserted between the check plate 23 and the connecting plate 24, the deflector rod 27 is driven to move by the limiting rod 16, the deflector rod 27 drives the check plate 23 and the connecting plate 24 to move, thereby controlling the check plate 23 to be away from the safety pin 15, facilitating the safety pin 15 to descend, the outer wall of the connecting plate 24 is fixedly connected with the limiting spring 25, one end of the limiting spring 25 away from the connecting plate 24 is fixedly connected with the inner wall of the base connecting rod 7, when the long shaft side of the bidirectional cam 17 is contacted with the limiting rod 16, the limiting rod 16 is unfolded towards two sides, the check plate 23 and the connecting plate 24 are pulled away towards two sides by the deflector rod 27, the limiting spring 25 is extruded, when the bidirectional cam 17 rotates to the short shaft side to face the limiting rod 16, gag lever post 16 and driving lever 27 lose the restriction to contrary board 23 and connecting plate 24, limiting spring 25 in the connecting plate 24 outside kick-backs, promote to end contrary board 23 and connecting plate 24 and paste tight safety catch 15 again, resume the unidirectional motion of safety catch 15, there are multiunit reset spring 22 elevator ring 21 bottom fixed mounting, reset spring 22 bottom fixed connection is in the inside ring channel of manhole post 1, make the staff when stepping on footboard 12, elevator ring 21 can drop, simultaneously the staff is when going out from the manhole in the work of finishing, can drive elevator ring 21 through reset spring 22 and kick-backs, multiunit limiting spring 25 annular distribution is the same in elevator ring 21 below and reset spring 22 and footboard 12's position, improve and bear the atress.

With the first and second embodiments, the working principle is as follows:

in the invention, when the manhole upper cover 4 is opened, the butterfly nut is rotated to drive the lifting ring screw 11 to rotate, the lifting ring screw 11 is separated from the positioning groove 8, then the manhole upper cover 4 is driven to translate through the upper cover connecting rod 6 and the reinforcing ribs by rotating the ball head handle 3, so that the manhole is opened, the translation opening mode can save more labor and save more space when a worker opens the manhole, the worker can enter the manhole through the pedal 12 to conveniently enter the manhole, meanwhile, when the worker steps down the pedal 12, the lifting ring 21 can be driven to descend, the lifting ring 21 descends to compress the return spring 22, the assembling plate 20 is driven to descend, the assembling plate 20 descends to drive one end of the pry bar 13 at the top to descend, so that the pry bar 13 rotates around the middle part as a fulcrum, and the other end of the pry bar 13 tilts up, the safety pin 15 is driven to move upwards through the rotating rod 14 to jack up, when the safety pin 15 moves upwards, the inclined plane between the two sets of clamping teeth is extruded, the safety pin 15 jacks the check plate 23 to ascend, the safety pin 15 protrudes out of the upper surface of the base connecting rod 7 after rising, so that the upper cover connecting rod 6 cannot return to the upper surface of the base connecting rod 7, and the effect of preventing the manhole cover from closing is realized, at the moment, when the safety pin 15 descends, the horizontal plane between the two sets of clamping teeth is extruded, so that the safety pin 15 cannot jack the check plate 23, the limiting effect on the safety pin 15 is realized, after the operation of a worker is finished, the worker comes out of the manhole and drives the bidirectional cam 17 to rotate through the rotating knob 18, the bidirectional cam 17 gradually rotates to the long axis side to be contacted with the limiting rod 16, the limiting rod 16 expands towards two sides, the check plate 23 and the connecting plate 24 are pulled open towards two sides through the pulling rod 27 to extrude the limiting spring 25, so that the check plate 23 is separated from the safety pin 15, the safety pin 15 is not limited, at this time, the lifting ring 21 is lifted under the action of the return spring 22, thereby driving the pry bar 13 to rotate to the recovery level, one side of the pry bar 13 close to the assembling plate 20 moves upwards, and one side close to the safety pin 15 pulls the safety pin 15 downwards, thereby retracting the safety pin 15 into the base connecting rod 7, so that the upper cover connecting rod 6 can return to the upper surface of the base connecting rod 7, after the manhole upper cover 4 is closed or the safety pin 15 falls down, the bidirectional cam 17 is rotated back to the short shaft side to face the limit rod 16, the limit rod 16 and the shift lever 27 lose the limitation on the check plate 23 and the connecting plate 24, the limit spring 25 outside the connecting plate 24 rebounds to push the check plate 23 and the connecting plate 24 to cling to the safety pin 15 again, and the unidirectional movement of the safety pin 15 is recovered.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A translation type visible manhole cover device comprises a manhole column (1) and is characterized in that a flange plate is mounted at the top end of the manhole column (1), the upper surface of the flange plate abuts against a manhole upper cover (4), a base connecting rod (7) is fixedly mounted on the side wall of the manhole column (1), a rotary base (9) is fixedly mounted at the outer end of the base connecting rod (7), and a rotary guide pillar (2) is rotatably connected to the upper surface of the outer end of the rotary base (9);

an upper cover connecting rod (6) is fixedly arranged at the bottom of the side wall of the rotary guide post (2), one end of the upper cover connecting rod (6) far away from the rotating guide post (2) is fixedly connected with the outer wall of the manhole upper cover (4), the side wall of the rotary guide post (2) is fixedly provided with a reinforcing rib, two ends of the reinforcing rib are respectively connected with the side wall of the rotary guide post (2) and the upper surface of the manhole upper cover (4), a ball head handle (3) is fixedly arranged at the top end of the rotary guide post (2), the ball head handle (3) is vertical to the axis of the rotating guide post (2), a hole is arranged at the center of the manhole upper cover (4), a glass sight glass (5) is fixedly arranged on the upper surface of the manhole upper cover (4) above the hole, the glass is fixedly arranged at the center of the glass sight glass (5), a handle (10) is fixedly arranged on one side of the manhole upper cover (4) far away from the rotary guide post (2), a plurality of groups of positioning grooves (8) are arranged on the side wall of the manhole upper cover (4) in an annular array, the bottom of a flange plate at the top end of the manhole column (1) is rotatably connected with a shaft pin, a lifting ring screw (11) is condensed on the outer wall of the shaft pin, the lifting ring screw (11) is clamped and connected inside the positioning groove (8), a butterfly nut is fixedly mounted at the top of the lifting ring screw (11), a pedal (12) is arranged inside the manhole column (1), and a safety structure is arranged below the base connecting rod (7);

the manhole column (1) is fixedly installed on an industrial tank body, the installation angle of the manhole column (1) forms a 20-degree included angle in the horizontal direction, the rotary guide column (2) also forms a 20-degree included angle in the manhole upper cover (4), the rotary guide column (2) is in a vertical downward state, an annular groove is formed in the inner wall of the manhole column (1), lifting rings (21) are connected to the inner portion of the annular groove in a sliding mode, pedals (12) are fixedly installed on the side wall of the lifting rings (21), multiple groups of pedals (12) are distributed on the inner side of the lifting rings (21) in an annular mode, at least two groups of lifting rings (21) are vertically distributed inside the manhole column (1), the pedals (12) on the inner wall of the multiple groups of lifting rings (21) are arranged in a staggered mode, assembling plates (20) are fixedly installed on the outer wall of the lifting rings (21), the assembling plates (20) are connected to the manhole column (1) in a sliding mode, a prying rod (13) is rotatably connected to the top of the assembling plates (20), a rotating seat (26) is fixedly installed at the bottom of the base connecting rod (7), a rotating seat (26) is connected with the prying rod (13) through a rotating shaft, a connecting rod (13), and a safety lever (17) and a cam connecting structure is arranged below the base connecting rod (17) and a safety lever (17) and a cam connecting rod (17) is arranged below the safety pin (17), and a rotating structure, and a safety pin (17) is arranged below the safety pin (17) and a safety pin connecting rod (17) and a rotating structure, knob (18), spacing groove (19), contrary board (23) connecting plate (24), spacing spring (25) and driving lever (27), the one end that equipment board (20) was kept away from in pinch bar (13) is rotated and is connected with dwang (14), dwang (14) run through in safety pin (15) bottom, safety pin (15) insert inside base connecting rod (7), safety pin (15) both sides fixed mounting has the latch, inside horizontal direction sliding connection along of base connecting rod (7) has contrary board (23) and connecting plate (24), contrary board (23) have the latch towards safety pin (15) one side outer wall fixed mounting, safety pin (15) and contrary board (23) are through the latch card and are connected, contrary board (23) and connecting plate (24) fixed connection, leave the clearance between contrary board (23) and connecting plate (24), fixed surface mounting has spacing groove (19) under base connecting rod (7), spacing rod (16) sliding connection is inside spacing groove (19), spacing rod (16) cross section becomes the J font and connects in the one end cam (16) other end is connected through T sliding connection of cam (17) two-way cam (17) bottom and base connecting rod (17), two-way cam (17) outer wall fixed mounting has knob (18), fixed surface installs driving lever (27) on gag lever post (16), driving lever (27) are pegged graft between backstop (23) and connecting plate (24), connecting plate (24) outer wall fixed connection has spacing spring (25), the one end fixed connection that connecting plate (24) were kept away from in spacing spring (25) is at base connecting rod (7) inner wall, the latch of safety catch (15) outer wall is opposite with the latch direction of backstop (23) outer wall, the latch cross section of backstop (23) outer wall is inverted triangle-shaped.

2. The translational type visible manhole cover device according to claim 1, wherein multiple sets of return springs (22) are fixedly installed at the bottom of the lifting ring (21), the bottom ends of the return springs (22) are fixedly connected in an annular groove inside the manhole column (1), multiple sets of limit springs (25) are annularly distributed below the lifting ring (21), and the positions of the return springs (22) and the pedal (12) are the same.