CN221072729U - High-safety valve well structure - Google Patents

Abstract

The utility model discloses a valve well structure with high safety performance, and relates to the technical field of valve wells. The valve well main part is rectangular form structure setting, and the top of valve well main part slides and is provided with the well lid, and the draw-in groove has been seted up to the bottom of valve well main part, and the quantity of draw-in groove is two sets of and is parallel corresponding setting, is provided with the gas pipe in the draw-in groove. According to the utility model, the sand is backfilled in the valve well by arranging the identification rod, so that the airtight space in the valve well is greatly reduced by about 90% -95%, the occurrence of the problem of airtight potential safety hazards is reduced, the working safety of workers is greatly improved, meanwhile, the novel petrolatum oil belt corrosion prevention method is good in effect, the corrosion of oxygen and water to valves and facilities is greatly reduced, the novel technology is more reliable, and the pipelines and facilities in the valve well are in a direct-buried environment in a sand backfilling mode, thereby achieving a maintenance-free state, only the inspection of the valve well is required to be enhanced, the production of maintenance cost is also reduced, and the practicability of the device is greatly improved.

Description

High-safety valve well structure

Technical Field

The utility model relates to the technical field of valve wells, in particular to a valve well structure with high safety performance.

Background

In recent years, gas accidents frequently occur in a closed space, which causes a great deal of injury to personnel and huge economic loss. Various levels of government and group companies pay high attention to the reduction of working space, when the local gas industry is rising, a plurality of companies have partial manholes under the condition of building main pipelines due to technical conditions, and the valve holes have larger closed spaces and are in a non-ventilation state under the ground throughout the year, so that potential safety hazards exist.

Therefore, the types, styles, functions and auxiliary facilities of the valve in the lower manhole are required to be classified, a feasibility research scheme is formulated, the lower manhole is modified into a hand manhole by using a more advanced technology, the aim of reducing the closed space is achieved, and the main purpose is to reduce the existing closed space and the potential safety hazard and provide basic conditions for the safe operation of the gas facilities.

For this purpose, a valve shaft structure with high safety is proposed.

Disclosure of utility model

The utility model aims at: the utility model provides a valve well structure with high safety performance, which aims to solve the problem of reducing the internal closed space of the existing gas valve well.

The utility model adopts the following technical scheme for realizing the purposes:

The valve well structure with high safety performance comprises a valve well main body, wherein the valve well main body is arranged in a rectangular structure, a well cover is slidably arranged at the top of the valve well main body, clamping grooves are formed in the bottom of the valve well main body, the number of the clamping grooves is two, the clamping grooves are arranged in parallel and correspond to each other, a gas pipe is arranged in the clamping grooves, a gas valve body is arranged in the valve well main body on the gas pipe, fixing rods and marking rods are fixedly arranged on the inner walls of the two sides of the valve well main body, the fixing rods are positioned right above the gas pipe, a pipeline limiting and stabilizing mechanism is arranged on the fixing rods, the marking rods are positioned right above the fixing rods, the distance between the top of each marking rod and the top of the valve well main body is 80cm, sand is filled below each marking rod, the sand height and the marking rods are horizontally arranged, and a cover limiting mechanism is arranged on the corresponding side walls of the marking rods and the well cover;

Specifically, in some embodiments, when the valve well body needs to be rebuilt or built, at this moment, the user builds the valve well body with proper height according to the required construction in the field, limit and fix the pipeline in the valve well body through the pipeline limit and stabilization mechanism, install the gas valve body on the pipeline simultaneously, make the gas valve body valve in the valve well body open and close knob apart from the valve well body top 50cm, be convenient for the observation of operating personnel naked eyes, reduce the potential safety hazard that causes improperly, after the gas valve body is installed, the user wraps the outside of the gas valve body through STAC petrolatum anticorrosion sticky tape, make the valve be in the state of isolating oxygen and preventing water corrosion, promote anticorrosive effect, also can let the valve satisfy the requirement that is in the direct-buried environment, at this moment the user can be according to the sign pole to carry out sand backfill in the valve well body, sand backfill makes valve and well pipeline be in the direct-buried environment, greatly reduced airtight space reduces more than%, if need to carry out at later stage, the user drives the lid spacing mechanism and can move the well lid, thereby reach the observation effect.

Further, the pipeline limiting and stabilizing mechanism comprises a first handle, a clamping plate, a fourth sliding block, a second threaded rod, a fourth sliding groove, a fifth gear and a sixth gear, wherein the fourth sliding groove is formed in the bottom of the fixed rod, the second threaded rod is rotatably installed on the inner walls of the front side and the rear side of the fourth sliding groove, the sixth gear is fixedly installed at one end of the second threaded rod, the fifth gear is rotatably installed at the top of the inner side of the fourth sliding groove, the fifth gear is meshed with the sixth gear, the first handle is rotatably installed at the top of the fixed rod, a rotating shaft of the first handle longitudinally penetrates through the fixed rod and is fixedly connected with the rotating shaft of the fifth gear, the fourth sliding block is arranged in the fourth sliding groove, the number of the fourth sliding blocks is two groups and is correspondingly arranged, and clamping plates matched with a gas pipe are sequentially and fixedly installed at the bottom of the fourth sliding block;

Specifically, after the gas pipe enters the valve well body, a user rotates the first handle, so that the fifth gear drives the sixth gear to rotate, at the moment, the second threaded rod rotates to enable the two groups of fourth sliding blocks to move in opposite directions, and at the moment, the two groups of clamping plates can clamp, fix and limit the pipeline.

Further, the cover body limiting mechanism comprises a limiting rod, a first sliding groove, a second sliding groove, a first threaded rod, a second sliding block, a protective shell, a positioning plate, a second handle, a first gear, a second gear, a connecting rod, a third gear, a fourth gear, a third sliding block, a third sliding groove, a sliding rod, a movable rod, the first sliding block and an auxiliary wheel, wherein the second sliding groove is formed in the top of the identification rod, the first threaded rod is rotatably arranged on the inner wall of the front side and the rear side of the second sliding groove, the first threaded rod transversely penetrates through the second sliding groove and extends to the outside of the rear side of the valve well main body, the first gear is fixedly arranged on one end of the first threaded rod outside the rear side of the valve well main body, the protective shell is fixedly arranged on the outer side of the first gear, the connecting rod is rotatably arranged on the inner walls of the two sides of the protective shell, the second gear is fixedly arranged on the connecting rod and is positioned at the first gear, the second gear is meshed with the first gear, a fourth gear is fixedly arranged at the middle of the connecting rod, positioning plates are fixedly arranged on the inner walls of the two sides of the protective shell, the bottom of the positioning plates is rotatably provided with a third gear meshed with the fourth gear, the top of the positioning plates is rotatably provided with a second handle, a rotating shaft of the second handle longitudinally penetrates through the positioning plates and is fixedly connected with the rotating shaft of the third gear, second sliding blocks are arranged in the second sliding grooves, the number of the second sliding blocks is two groups and are sequentially arranged at the inner walls of the front side and the rear side of the second sliding grooves, the second sliding blocks are sleeved on the first threaded rod and are in threaded connection with the first threaded rod, the inner threads of the two groups of second sliding blocks are in opposite arrangement, the tops of the second sliding blocks are sequentially hinged with supporting rods, the two groups of supporting rods are in crossed arrangement, the middle parts of the two groups of supporting rods are hinged with each other, the free ends of the supporting rods are provided with movable rods, the bottom of the movable rod is provided with a third sliding groove, the inner walls of the front side and the rear side of the third sliding groove are fixedly provided with sliding rods, the third sliding grooves are internally provided with third sliding blocks, the number of the third sliding blocks is two, the third sliding blocks are sleeved on the sliding rods and are in sliding connection with the sliding rods, the bottoms of the third sliding blocks are sequentially hinged with the free ends of the two groups of supporting rods, the top of the movable rod is provided with a first sliding groove, the inner walls of the front side and the rear side of the first sliding groove are fixedly provided with limiting rods, the first sliding grooves are internally provided with first sliding blocks, the first sliding blocks are sleeved on the limiting rods and are in sliding connection with the limiting rods, and the tops of the first sliding blocks are fixedly connected with a well cover;

Specifically, the user causes the third gear to drive the fourth gear and the connecting rod to rotate through rotating the second handle, and at this moment, the second gear rotates to cause the first gear and the first threaded rod to rotate, and at this moment, two groups of first sliding blocks move in opposite directions to cause two groups of support rods to hinge and lift the movable rod, and the movable rod moves longitudinally, and at this moment, the well lid breaks away from the top of the valve well main body, and at this moment, the user pulls the well lid to slide the well lid, so that the well lid is opened.

Further, the initial position of the first sliding block is positioned at the inner wall of one side of the first sliding groove, an auxiliary wheel is arranged at the position, opposite to the first sliding block, of the top of the movable rod, the top of the auxiliary wheel is attached to the bottom of the well lid, and the wheel body of the auxiliary wheel is made of rubber;

Specifically, the auxiliary wheel can carry out horizontal support to the well lid effectually, also can carry out auxiliary protection's effect to the well lid when the well lid slides simultaneously, causes the staff to use laborsaving facility more.

Further, the top of the protective shell is in an open structure, the top of the protective shell is hinged with a protective cover, and a sealing rubber pad is arranged at the joint of the protective cover and the protective shell; specifically, the effectual protective housing that seals avoids the protective housing back of intaking, leads to the second handle to appear corrosion unable pivoted condition to appear.

Further, the corresponding side wall of the clamping plate is arranged in an arc-shaped structure, and an anti-abrasion rubber pad is arranged on the corresponding side wall of the clamping plate; specifically, splint can effectually laminate the external diameter of pipeline, and the condition of wearing and tearing can be avoided to the use of rubber pad simultaneously, also guarantees that the pipeline has certain space when expend with heat and contract with cold.

The beneficial effects of the utility model are as follows:

According to the utility model, the sand is backfilled in the valve well by arranging the identification rod, so that the airtight space in the valve well is greatly reduced by about 90% -95%, the occurrence of the problem of airtight potential safety hazards is reduced, the working safety of workers is greatly improved, meanwhile, the novel petrolatum oil belt corrosion prevention method is good in effect, the corrosion of oxygen and water to valves and facilities is greatly reduced, the novel technology is more reliable, and the pipelines and facilities in the valve well are in a direct-buried environment in a sand backfilling mode, thereby achieving a maintenance-free state, only the inspection of the valve well is required to be enhanced, the production of maintenance cost is also reduced, and the practicability of the device is greatly improved.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic view of the position structure of the gas valve body of the present utility model;

FIG. 3 is a schematic view of the internal structure of the protective shell of the present utility model;

FIG. 4 is a schematic view of the structure of the movable bar of the present utility model;

Fig. 5 is a schematic structural view of the fixing rod of the present utility model.

Reference numerals: 1. a well cover; 2. a valve well body; 3. a gas pipe; 4. a clamping groove; 5. a protective shell; 6. a limit rod; 7. a first chute; 8. a marking rod; 9. a second slider; 10. a first threaded rod; 11. a second chute; 12. a clamping plate; 13. a first handle; 14. a gas valve body; 15. a second handle; 16. a positioning plate; 17. a first gear; 18. a connecting rod; 19. a second gear; 20. a third gear; 21. a fourth gear; 22. a third slider; 23. a third chute; 24. a slide bar; 25. a first slider; 26. a movable rod; 27. an auxiliary wheel; 28. a fourth chute; 29. a second threaded rod; 30. a fourth slider; 31. a fixed rod; 32. a fifth gear; 33. and a sixth gear.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

As shown in fig. 1 to 5, the valve well structure that the security performance is high, including valve well main part 2, valve well main part 2 is rectangular form structure setting, the top slip of valve well main part 2 is provided with well lid 1, draw-in groove 4 has been seted up to the bottom of valve well main part 2, the quantity of draw-in groove 4 is two sets of and is parallel correspondence setting, be provided with gas pipe 3 in the draw-in groove 4, the inside that lies in valve well main part 2 on the gas pipe 3 is provided with gas valve body 14, gas valve body 14 is the customization direct burial valve, the interval that the valve knob of gas valve body 14 is opened and close the top of valve well main part 2 is 50cm, the outside wall bonding cladding of gas valve body 14 is provided with STAC petrolatum anticorrosion sticky tape, both sides inner wall fixed mounting of valve well main part 2 has dead lever 31 and marking lever 8, dead lever 31 is located directly over the gas pipe 3, be provided with pipeline spacing stabilizing mechanism on the dead lever 31, and marking lever 8 is located directly over the dead lever 31, and the interval that the top distance of marking lever 8 is 80cm from valve well main part 2 top, be located marking lever 8 in the valve well main part 2 and all fill with sand soil and soil, the height is provided with marking lever 8 and the corresponding side wall 1 level setting. The gas valve body 14 can also adopt the existing gas valve, and the outer side wall of the gas valve body 14 can also be adhered and coated with a common anti-corrosion adhesive tape.

Specifically, in some embodiments, when the valve well body 2 needs to be rebuilt or built, at this time, a user builds the valve well body 2 with proper height according to the field requirement, the pipeline in the valve well body 2 is limited and fixed through the pipeline limiting and stabilizing mechanism, meanwhile, the gas valve body 14 is installed on the pipeline, so that the opening and closing knob of the gas valve body 14 in the valve well body 2 is 50cm away from the top of the valve well body 2, visual observation of operators is facilitated, potential safety hazards caused by improper operation are reduced, after the gas valve body 14 is installed, the user wraps the outside of the gas valve body 14 through the STAC petrolatum anti-corrosion adhesive tape, the valve is in a state of isolating oxygen and preventing corrosion, the anti-corrosion effect is improved, and the requirement of the valve in a direct-buried environment can be met, at this time, the user can carry out sand and soil backfilling on the valve well body 2 according to the marking rod 8, the valve and the pipeline in the direct-buried environment is greatly reduced by more than 90%, if the later maintenance is needed, the user drives the well cover body mechanism to move, and thus the limiting effect can be achieved.

As shown in fig. 1 to 5, the pipe limit stabilizing mechanism comprises a first handle 13, a clamping plate 12, a fourth sliding block 30, a second threaded rod 29, a fourth sliding groove 28, a fifth gear 32 and a sixth gear 33, wherein the fourth sliding groove 28 is formed in the bottom of a fixed rod 31, the second threaded rod 29 is rotatably mounted on the inner wall of the front side and the rear side of the fourth sliding groove 28, the sixth gear 33 is fixedly mounted at one end of the second threaded rod 29, the fifth gear 32 is rotatably mounted on the top of the inner side of the fourth sliding groove 28, the fifth gear 32 is meshed with the sixth gear 33, the first handle 13 is rotatably mounted on the top of the fixed rod 31, a rotating shaft of the first handle 13 longitudinally penetrates through the fixed rod 31 and is fixedly connected with the rotating shaft of the fifth gear 32, the fourth sliding groove 28 is internally provided with the fourth sliding block 30, the fourth sliding block 30 is correspondingly arranged in two groups, and the clamping plate 12 matched with the gas pipe 3 is sequentially fixedly mounted at the bottom of the fourth sliding block 30. The sixth gear 33 and the fifth gear 32 are bevel gears.

Specifically, after the gas pipe 3 enters the valve well body 2, the user rotates the first handle 13, so that the fifth gear 32 drives the sixth gear 33 to rotate, at this time, the second threaded rod 29 rotates to enable the two groups of fourth sliders 30 to move in opposite directions, and at this time, the two groups of clamping plates 12 can clamp, fix and limit the pipeline.

As shown in fig. 1 to 5, the cover body limiting mechanism comprises a limiting rod 6, a first chute 7, a second chute 11, a first threaded rod 10, a second sliding block 9, a protecting shell 5, a positioning plate 16, a second handle 15, a first gear 17, a second gear 19, a connecting rod 18, a third gear 20, a fourth gear 21, a third sliding block 22, a third chute 23, a sliding rod 24, a movable rod 26, a first sliding block 25 and an auxiliary wheel 27, wherein the top of the identifying rod 8 is provided with the second chute 11, the front and rear inner walls of the second chute 11 are rotatably provided with the first threaded rod 10, the first threaded rod 10 transversely penetrates through the second chute 11 and extends to the outside of the rear side of the valve well body 2, the first threaded rod 10 is fixedly provided with the first gear 17 at one end of the outside of the rear side of the valve well body 2, the rear side wall of the valve well body 2 is fixedly provided with the protecting shell 5 at the outside of the first gear 17, the protecting shell 5 is arranged in a T-shaped structure, the connecting rod 18 is rotatably arranged on the inner walls of the two sides of the protective shell 5, the second gear 19 is fixedly arranged at the first gear 17 on the connecting rod 18, the second gear 19 is meshed with the first gear 17, the fourth gear 21 is fixedly arranged at the middle position of the connecting rod 18, the positioning plate 16 is fixedly arranged on the inner walls of the two sides of the protective shell 5, the third gear 20 meshed with the fourth gear 21 is rotatably arranged at the bottom of the positioning plate 16 at the fourth gear 21, the second handle 15 is rotatably arranged at the top of the positioning plate 16, the rotating shaft of the second handle 15 longitudinally penetrates through the positioning plate 16 and is fixedly connected with the rotating shaft of the third gear 20, the second sliding grooves 11 are internally provided with second sliding blocks 9, the number of the second sliding blocks 9 is two, the second sliding blocks 9 are sequentially arranged at the inner walls of the front side and the rear side of the second sliding grooves 11, the second sliding blocks 9 are sleeved on the first threaded rod 10 and are in threaded connection with the first threaded rod 10, the built-in screw threads of the two groups of second sliding blocks 9 are oppositely arranged, supporting rods are hinged to the tops of the second sliding blocks 9 in sequence, the two groups of supporting rods are in cross arrangement, the middle parts of the two groups of supporting rods are hinged to each other, movable rods 26 are arranged at the free ends of the supporting rods, third sliding grooves 23 are formed in the bottoms of the movable rods 26, sliding rods 24 are fixedly arranged on the inner walls of the front side and the rear side of the third sliding grooves 23, third sliding blocks 22 are arranged in the third sliding grooves 23 in a built-in mode, the number of the third sliding blocks 22 is two, the third sliding blocks 22 are sleeved on the sliding rods 24 and are in sliding connection with the sliding rods 24, the bottoms of the third sliding blocks 22 are hinged to the free ends of the two groups of supporting rods in sequence, first sliding grooves 7 are formed in the tops of the movable rods 26 in a hinged mode, limiting rods 6 are fixed to the inner walls of the front side and the rear side of the first sliding grooves 7, first sliding blocks 25 are sleeved on the limiting rods 6 and are in sliding connection with the limiting rods 6, and the tops of the first sliding blocks 25 are fixedly connected with the well covers 1.

Specifically, the user rotates the second handle 15 to drive the third gear 20 to drive the fourth gear 21 to rotate with the connecting rod 18, at this time, the second gear 19 rotates to drive the first gear 17 and the first threaded rod 10 to rotate, at this time, the two groups of second sliding blocks 9 move in opposite directions to drive the two groups of support rods to hinge and lift the movable rods 26, the movable rods 26 move longitudinally, at this time, the well lid 1 is separated from the top of the valve well main body 2, at this time, the user pulls the well lid 1 to slide the well lid 1, and therefore the well lid 1 is opened.

As shown in fig. 1 to 5, the initial position of the first slider 25 is located at the inner wall of one side of the first chute 7, an auxiliary wheel 27 is disposed at the position opposite to the first slider 25 at the top of the movable rod 26, the top of the auxiliary wheel 27 is attached to the bottom of the well lid 1, and the wheel body of the auxiliary wheel 27 is made of rubber.

Specifically, the auxiliary wheel 27 can effectively horizontally support the well lid 1, and can also assist the well lid 1 in protecting when the well lid 1 slides, so that the use of staff is more labor-saving and convenient.

As shown in fig. 1 to 5, the top of the protecting shell 5 is in an open structure, the top of the protecting shell 5 is hinged with a protecting cover, a sealing rubber pad is arranged at the joint of the protecting cover and the protecting shell 5, the protecting shell 5 is effectively sealed, and the condition that rust cannot rotate due to the fact that the second handle 15 is corroded after the protecting shell 5 is filled with water is avoided.

As shown in fig. 1 to 5, the corresponding side wall of the clamping plate 12 is in an arc-shaped structure, and an anti-abrasion rubber pad is arranged on the corresponding side wall of the clamping plate 12, the clamping plate 12 can effectively fit with the outer diameter of the pipeline, meanwhile, the rubber pad can avoid abrasion, and a certain space is also ensured when the pipeline expands with heat and contracts with cold.

As shown in fig. 1 to 5, the first gear 17, the second gear 19, the third gear 20 and the fourth gear 21 have the same size and structure and are all conical gears.

To sum up: in some embodiments, when the valve well body 2 needs to be rebuilt or built, at this time, a user builds the valve well body 2 with proper height according to the field requirement, the pipeline in the valve well body 2 is limited and fixed through the pipeline limiting and stabilizing mechanism, meanwhile, the gas valve body 14 is installed on the pipeline, so that the opening and closing knob of the gas valve body 14 in the valve well body 2 is 50cm away from the top of the valve well body 2, the visual observation of operators is facilitated, the potential safety hazard caused by improper operation is reduced, after the gas valve body 14 is installed, the user wraps the outside of the gas valve body 14 through the STAC petrolatum anti-corrosion adhesive tape, the valve is in a state of isolating oxygen and preventing water corrosion, the anti-corrosion effect is improved, the requirement of the valve in a direct-buried environment is met, at this time, the user can backfill sand in the valve well body 2 according to the identification rod 8, if the inspection is needed in the later period, the user drives the cover body limiting mechanism to move the well lid 1, so that the observation effect is achieved, after the gas pipe 3 enters the valve well body 2, the user rotates the first handle 13, the fifth gear 32 drives the sixth gear 33 to rotate, the second threaded rod 29 rotates to enable the two groups of fourth sliding blocks 30 to move oppositely, the two groups of clamping plates 12 can clamp and fix and limit the pipelines, the user rotates the second handle 15, the third gear 20 drives the fourth gear 21 to rotate with the connecting rod 18, the second gear 19 rotates to enable the first gear 17 and the first threaded rod 10 to rotate, the two groups of second sliding blocks 9 move oppositely, the two groups of supporting rods are hinged to the lifting movable rods 26, the movable rods 26 move longitudinally, the well lid 2 is separated from the top of the valve well body 2, at this time, the user pulls the well lid 1 to slide the well lid 1, thereby opening the well lid 1.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made therein without departing from the spirit and scope of the utility model, which is defined by the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (6)

1. The utility model provides a high valve well structure of security performance, a serial communication port, including valve well main part (2), valve well main part (2) are rectangular form structure setting, top slip of valve well main part (2) is provided with well lid (1), draw-in groove (4) have been seted up to the bottom of valve well main part (2), the quantity of draw-in groove (4) is two sets of just be parallel correspondence setting, be provided with gas pipe (3) in draw-in groove (4), be located the inside of valve well main part (2) on gas pipe (3) and be provided with gas valve body (14), both sides inner wall fixed mounting of valve well main part (2) has dead lever (31) and marking pole (8), dead lever (31) are located directly over gas pipe (3), be provided with pipeline spacing stabilizing mechanism on dead lever (31), and the interval of marking pole (8) apart from valve well main part (2) top is 80cm, all fill in valve well main part (2) and have sand soil, sand soil height and marking pole (8) level are provided with the well lid (8) and are corresponding with spacing mechanism of setting up (1).

2. The high-safety valve well structure according to claim 1, wherein the pipe limit stabilizing mechanism comprises a first handle (13), a clamping plate (12), a fourth sliding block (30), a second threaded rod (29), a fourth sliding groove (28), a fifth gear (32) and a sixth gear (33), the fourth sliding groove (28) is formed in the bottom of the fixed rod (31), the second threaded rod (29) is rotatably mounted on the inner walls of the front side and the rear side of the fourth sliding groove (28), the sixth gear (33) is fixedly mounted at one end of the second threaded rod (29), the fifth gear (32) is rotatably mounted at the top of the inner side of the fourth sliding groove (28), the fifth gear (32) is meshed with the sixth gear (33), the first handle (13) is rotatably mounted at the top of the fixed rod (31), the rotating shaft of the first handle (13) longitudinally penetrates through the fixed rod (31) and is fixedly connected with the rotating shaft of the fifth gear (32), the fourth sliding block (30) is mounted in the fourth sliding groove (28), the number of the fourth sliding block (30) is two groups and is correspondingly arranged, and the bottom of the fourth sliding block (30) is fixedly mounted on the clamping plate (12) in sequence.

3. The high-safety valve well structure according to claim 1, wherein the cover limiting mechanism comprises a limiting rod (6), a first sliding groove (7), a second sliding groove (11), a first threaded rod (10), a second sliding block (9), a protective shell (5), a positioning plate (16), a second handle (15), a first gear (17), a second gear (19), a connecting rod (18), a third gear (20), a fourth gear (21), a third sliding block (22), a third sliding groove (23), a sliding rod (24), a movable rod (26), a first sliding block (25) and an auxiliary wheel (27), wherein the second sliding groove (11) is formed in the top of the marking rod (8), the front side inner wall and the rear side inner wall of the second chute (11) are rotatably provided with a first threaded rod (10), the first threaded rod (10) transversely penetrates through the second chute (11) and extends to the outside of the rear side of the valve well main body (2), the first threaded rod (10) is fixedly provided with a first gear (17) at one end of the outside of the rear side of the valve well main body (2), the rear side wall of the valve well main body (2) is fixedly provided with a protective shell (5) at the outer side of the first gear (17), the inner walls at the two sides of the protective shell (5) are rotatably provided with connecting rods (18), the connecting rods (18) are fixedly provided with second gears (19) at the positions of the first gears (17), the second gear (19) is meshed with the first gear (17), a fourth gear (21) is fixedly arranged at the center of the connecting rod (18), positioning plates (16) are fixedly arranged on the inner walls of the two sides of the protecting shell (5), a third gear (20) meshed with the fourth gear (21) is rotatably arranged at the bottom of the positioning plates (16) and positioned at the fourth gear (21), a second handle (15) is rotatably arranged at the top of the positioning plates (16), a rotating shaft of the second handle (15) longitudinally penetrates through the positioning plates (16) and is fixedly connected with the rotating shaft of the third gear (20), a second sliding block (9) is arranged in the second sliding groove (11), the number of the second sliding blocks (9) is two groups, the second sliding blocks (9) are sequentially positioned at the front side inner wall and the rear side inner wall of the second sliding groove (11), the second sliding blocks (9) are sleeved on the first threaded rod (10) and are in threaded connection with the first threaded rod (10), the built-in threads of the two groups of second sliding blocks (9) are oppositely arranged, the top parts of the second sliding blocks (9) are sequentially hinged with supporting rods, the two groups of supporting rods are in crossed arrangement, the middle parts of the two groups of supporting rods are hinged with each other, the free ends of the supporting rods are provided with movable rods (26), the bottom of the movable rods (26) is provided with a third sliding groove (23), the front side inner wall and the rear side inner wall of the third sliding groove (23) are fixedly provided with sliding rods (24), third spout (23) embeds third slider (22), the quantity of third slider (22) is two sets of, third slider (22) cover is located on slide bar (24) and is set up with slide bar (24) sliding connection, the bottom of third slider (22) is connected with the free end hinge of two sets of bracing pieces in proper order and is set up, first spout (7) have been seted up at the top of movable rod (26), the front and back side inner wall of first spout (7) is fixed with gag lever post (6), first slider (25) are built-in to first spout (7), first slider (25) cover is located on gag lever post (6) and is set up with gag lever post (6) sliding connection, the top and well lid (1) fixed connection of first slider (25) set up.

4. A valve well structure with high safety performance according to claim 3, wherein the initial position of the first sliding block (25) is located at the inner wall of one side of the first sliding groove (7), an auxiliary wheel (27) is arranged at the position, opposite to the first sliding block (25), of the top of the movable rod (26), the top of the auxiliary wheel (27) is attached to the bottom of the well cover (1), and the wheel body of the auxiliary wheel (27) is made of rubber.

5. A valve well structure with high safety performance according to claim 3, wherein the top of the protecting shell (5) is in an open structure, the top of the protecting shell (5) is hinged with a protecting cover, and a sealing rubber pad is arranged at the joint of the protecting cover and the protecting shell (5).

6. The high-safety valve well structure according to claim 2, wherein the corresponding side walls of the clamping plates (12) are arranged in an arc-shaped structure, and the corresponding side walls of the clamping plates (12) are provided with anti-wear rubber pads.