A well lid locking structure and a well lid locking method

Abstract

The application discloses a well lid locking structure, which comprises a lid body, a well lid base and a locking assembly. An outwardly open locking groove is arranged on the outer side of the lid body, and the lid body is arranged on the well lid base. An inwardly open mounting groove is arranged on the inner side of the well lid base, and the mounting groove is arranged opposite to the locking groove. The locking assembly comprises a locking seat and a limiting piece. The side of the locking seat is formed with a protruding part and a recessed part. The locking seat is rotatably arranged on the mounting groove so that the protruding part is located on the locking groove or the protruding part is not located on the locking groove. When the protruding part is not located on the locking groove, the recessed part does not contact the locking groove. The limiting piece is arranged on the locking seat and the well lid base to prevent the locking seat from rotating. The application further discloses a well lid locking method. After the lid body is arranged on the well lid base, the locking seat and the limiting piece are arranged. The limiting piece limits the locking seat, so that the rotating phenomenon of the locking seat can be effectively prevented, and the lid body is not easy to separate from the well lid base.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of well lid, in particular to a well lid locking structure and a well lid locking method. BACKGROUND

[0002] In the urban construction, there are many underground pipelines, such as sewer, underground gas pipeline, water pipeline, power pipeline, communication pipeline, national defense pipeline, etc. These pipelines have an outlet to the ground every certain distance, and the section from the pipeline to the ground becomes a well. In order to prevent people or objects from falling, a well lid is arranged on the well.

[0003] The traditional well lid usually comprises a well lid base and a cover arranged on the well lid base. In order to prevent the cover from being separated from the well lid base, a locking structure is arranged between the cover and the well lid base, such as a bolt for locking the cover on the well lid base. However, since the well lid is mainly used outdoors, it often bears the pressure of vehicles, and the environment is harsh, so that the locking structure is easily damaged, and the bolt is prone to loosening, thereby causing the cover to be separated from the well lid base. In view of the above defects in the prior art, the present application is produced. SUMMARY

[0004] The present application aims to solve at least one of the above technical problems in the prior art. To this end, one object of the present application is to provide a well lid locking structure which can effectively prevent the locking seat from rotating and the cover from being separated from the well lid base by arranging a locking seat and a limiting piece after the cover is placed on the well lid base.

[0005] A second object of the present application is to provide a well lid locking method.

[0006] To achieve the above object, the present application provides a well lid locking structure comprising a cover, a well lid base and a locking assembly.

[0007] The outer side of the cover is provided with a locking groove with an outward opening, and the cover is arranged on the well lid base.

[0008] The inner side of the well lid base is provided with a mounting groove with an inward opening, and the mounting groove is arranged opposite to the locking groove.

[0009] The locking assembly comprises a locking seat and a limiting piece. The side of the locking seat is formed with a protruding part and a recessed part. The locking seat is rotatably arranged on the mounting groove so that the protruding part is located on the locking groove or the protruding part is not located on the locking groove. When the protruding part is not located on the locking groove, the recessed part does not contact the locking groove. The limiting piece is arranged on the locking seat and the well lid base to prevent the locking seat from rotating.

[0010] Further, the inner side of the well lid base is provided with an upper convex seat, and the bottom of the cover is provided with a lower convex seat for abutting against the upper convex seat.

[0011] Further, the upper protrusions include a front protrusion, a first side protrusion, a rear protrusion and a second side protrusion arranged in sequence, a first reinforcing seat is arranged between the front protrusion and the first side protrusion, a second reinforcing seat is arranged between the first side protrusion and the rear protrusion, a third reinforcing seat is arranged between the rear protrusion and the second side protrusion, and a fourth reinforcing seat is arranged between the second side protrusion and the front protrusion.

[0012] Further, the locking assembly further includes a connecting piece fixed on the mounting groove through the locking seat.

[0013] Further, the connecting piece includes a connecting rod and a connecting head, one end of the connecting rod is fixed on the manhole cover seat, the connecting head is connected with the other end of the connecting rod, and the outer diameter of the connecting head is larger than the outer diameter of the connecting rod.

[0014] Further, the groove bottom of the mounting groove is provided with a through hole for the connecting rod to pass through.

[0015] Further, an inner thread is arranged in the through hole, and an outer thread matched with the inner thread is arranged on the outer side of the connecting rod.

[0016] Further, the fixing seat is arranged at the bottom of the manhole cover seat and below the mounting groove, and a cavity communicating with the through hole is formed in the fixing seat.

[0017] Further, the cavity communicates with the outside through a gap.

[0018] Further, the fixing seat includes a side fixing plate and a bottom fixing plate, the upper end of the side fixing plate is fixed on the bottom of the manhole cover seat, the side gap is arranged on the side of the side fixing plate, and the bottom fixing plate is fixed on the lower end of the side fixing plate.

[0019] Further, the inner side of the side fixing plate includes a first vertical surface, a curved surface and a second vertical surface, one end of the curved surface is connected with the first vertical surface, and the second vertical surface is connected with the other end of the curved surface.

[0020] Further, the bottom fixing plate is provided with a connecting surface, one side of the connecting surface is connected with the first vertical surface, the other side of the connecting surface is connected with the second vertical surface, and the end of the connecting surface is connected with the curved surface.

[0021] Further, the connecting surface is in a horizontal state.

[0022] Further, the connecting surface is in an inclined state, and the distance between the connecting surface and the manhole cover seat gradually decreases from the direction close to the curved surface to the direction away from the curved surface.

[0023] Further, the locking groove is a semicircular groove.

[0024] Further, one side of the manhole cover seat is provided with a connecting groove, and a protrusion is arranged on the side wall of the connecting groove; a connecting block matched with the connecting groove is arranged on the cover body, and a slot for inserting the protrusion is arranged on the connecting block so that the cover body can be rotatably arranged on the manhole cover seat.

[0025] Further, the protrusion is cuboid; the slot comprises a strip slot and a circular slot communicated with the strip slot, one end of the strip slot is communicated with the outside, the circular slot is arranged at the other end of the strip slot, and the inner diameter of the circular slot is greater than the width of the strip slot.

[0026] Further, the width of the strip slot is equal to or slightly greater than the length of the protrusion.

[0027] Further, one side wall of the connecting slot is provided with a first protrusion, the other side wall of the connecting slot is provided with a second protrusion; one side of the connecting block is provided with a first slot matched with the first protrusion, and the other side of the connecting block is provided with a second slot matched with the second protrusion.

[0028] Further, the bottom of the cover body is provided with staggered reinforcing plates.

[0029] Further, the reinforcing plate comprises a first horizontal reinforcing plate, a second horizontal reinforcing plate, a first vertical reinforcing plate, a second vertical reinforcing plate, a third vertical reinforcing plate and an annular reinforcing plate, the annular reinforcing plate is connected with the end portions of the first horizontal reinforcing plate, the second horizontal reinforcing plate, the first vertical reinforcing plate, the second vertical reinforcing plate and the third vertical reinforcing plate, and the locking slot is located on the outer side of the annular reinforcing plate.

[0030] Further, the bottom of the cover body is provided with a positioning block, and the well lid seat is provided with a positioning slot for inserting the positioning block.

[0031] Further, the positioning block comprises a positioning seat and an elastic positioning plate fixed on the positioning seat, the elastic positioning plate is in an arc shape, a deformation space is formed between the elastic positioning plate and the well lid seat, and a positioning head is arranged at the end portion of the elastic positioning plate.

[0032] Further, the positioning head comprises an upper outer inclined surface and a lower outer inclined surface, the upper inner inclined surface matched with the upper outer inclined surface is arranged on the upper portion of the positioning slot, and the lower inner inclined surface matched with the lower outer inclined surface is arranged on the lower portion of the positioning slot.

[0033] Further, the angle formed by the plane where the upper outer inclined surface is located and the plane where the lower outer inclined surface is located is obtuse; and the angle formed by the plane where the upper inner inclined surface is located and the plane where the lower inner inclined surface is located is obtuse.

[0034] Further, the locking seat comprises a locking head and a locking rod, the side portion of the locking head forms the protruding portion and the recessed portion, the locking rod is fixedly connected to the bottom portion of the locking head, the outer diameter of the locking rod is smaller than the outer diameter of the locking head, and the locking rod is internally formed with a channel for the connecting piece to pass through.

[0035] Further, the locking head comprises a side plate and a bottom plate, the bottom plate is fixed to the bottom portion of the side plate, and the bottom plate is formed with an abutting surface matched with the bottom of the locking slot.

[0036] Further, the side plate protrudes from the connecting head.

[0037] Further, the top portion of the locking head is provided with a driving slot for driving the locking head to rotate.

[0038] Further, the driving grooves include a first driving groove and a second driving groove, and an axial center line of the first driving groove coincides with an axial center line of the second driving groove.

[0039] Further, the side plate includes a side connecting arc plate and a side connecting vertical plate, the side connecting arc plate and the bottom plate form the protruding part, and the side connecting vertical plate and the bottom plate form the recessed part.

[0040] Further, an outer side of the side connecting vertical plate forms an outer side vertical surface, and a plane of the outer side vertical surface is parallel to a plane of a groove wall of the second driving groove.

[0041] Further, a height of the side connecting vertical plate is less than a height of the side connecting arc plate, one end of the side connecting vertical plate forms a first limiting surface, the other end of the side connecting vertical plate forms a second limiting surface, and a limiting opening is formed between the second limiting surface, the first limiting surface and a top of the side connecting vertical plate.

[0042] Further, the limiting piece includes a body and a limiting protrusion, one side of the body abuts against a side wall of the mounting groove, the other side of the body abuts against the side connecting vertical plate, the limiting protrusion is arranged on an upper end of the body, and the limiting protrusion is clamped into the limiting opening.

[0043] Further, one side of the limiting protrusion abuts against the first limiting surface, the other side of the limiting protrusion abuts against the second limiting surface, and a bottom of the limiting protrusion abuts against the top of the side connecting vertical plate.

[0044] Further, a width of the body gradually decreases from a direction close to the limiting protrusion to a direction away from the limiting protrusion.

[0045] Further, a first inclined surface is arranged on an outer side of the body, a second inclined surface is arranged on one side of the body, a vertical surface is arranged on an inner side of the body, a third inclined surface is arranged on the other side of the body, and the third inclined surface, the vertical surface, the second inclined surface and the first inclined surface are connected together in a head-tail mode.

[0046] Further, the body is in interference fit with the mounting groove.

[0047] Further, an end of the limiting protrusion is provided with a protection head abutting against the connecting head.

[0048] Further, a gap is formed between the limiting protrusion and the vertical surface.

[0049] To achieve the above object, the second aspect of the present application provides a manhole cover locking method, including the following steps:

[0050] S1, placing the cover body on the manhole cover seat so that the mounting groove is opposite to the locking groove;

[0051] S2, placing the locking seat on the mounting groove;

[0052] S3, using the connecting piece to pass through the locking seat and fix on the installation groove to make the locking seat rotate along the installation groove;

[0053] S4, rotating the locking seat to make the protruding part of the locking seat above the locking groove;

[0054] S5, inserting the limiting piece into the installation groove to make one side of the limiting piece abut against the sidewall of the installation groove and the other side of the limiting piece abut against the locking seat.

[0055] Further, in step S3, the end of the connecting piece protrudes from the bottom of the installation groove, and the end of the connecting piece is welded on the fixing seat.

[0056] Further, in step S3, the gap is formed between the bottom of the locking head and the bottom of the installation groove.

[0057] After adopting the above structure, the well lid locking structure has at least the following beneficial effects:

[0058] First, when in use, the cover body is installed on the well lid seat to make the installation groove face the locking groove, then the locking seat is installed to make the locking seat rotatably arranged on the installation groove, when locking, the locking seat is rotated to make the protruding part of the locking seat above the locking groove, finally the limiting piece is inserted into the installation groove to make the limiting piece contact with the locking seat and the well lid seat to prevent the locking seat from rotating, therefore, the locking seat is limited by the limiting piece, so that the rotating of the locking seat can be effectively prevented, and the cover body is not easy to separate from the well lid seat.

[0059] Second, when the cover body needs to be opened, the limiting piece is taken out, then the locking seat is rotated to make the protruding part of the locking seat not above the locking groove, at this time, the recess part of the locking seat faces the locking groove and does not contact with the locking groove, so that the cover body is not limited by the locking seat, thereby the cover body is opened. When the cover body needs to be closed, the cover body is placed on the well lid seat again, the locking seat is rotated to make the protruding part of the locking seat above the locking groove, finally the limiting piece is inserted into the installation groove to lock, therefore, the cover body is convenient to lock and open, and the locking structure is not easy to be damaged.

[0060] Third, by arranging the upper convex seat and the lower convex seat, when installing, the cover body is placed on the well lid seat, the lower convex seat abuts against the upper convex seat to support the cover body, and after the lower convex seat abuts against the upper convex seat, the installation groove is just opposite to the locking groove, thereby the locking seat is convenient to lock.

[0061] Compared with the prior art, by arranging the locking seat and the limiting piece, when locking, the protruding part of the locking seat is above the locking groove, finally the limiting piece is inserted into the installation groove, thereby the rotating of the locking seat can be effectively prevented, and the cover body is not easy to separate from the well lid seat. BRIEF DESCRIPTION OF DRAWINGS

[0062] Figure 1 Structure diagram of the well lid locking structure according to an embodiment of the present application;

[0063] Figure 2 Exploded view of the well lid locking structure according to an embodiment of the present application;

[0064] Figure 3 Sectional view of the well lid locking structure according to an embodiment of the present application;

[0065] Figure 4 Partial enlarged view of Figure 3 ;

[0066] Figure 5 Structure diagram of the cover according to an embodiment of the present application;

[0067] Figure 6 Structure diagram of the cover from another angle according to an embodiment of the present application;

[0068] Figure 7 Structure diagram of the well lid seat according to an embodiment of the present application;

[0069] Figure 8 Connection diagram of the positioning head and the positioning groove according to an embodiment of the present application;

[0070] Figure 9 Structure diagram of the well lid seat from another angle according to an embodiment of the present application;

[0071] Figure 10 Partial enlarged view of Figure 9 ;

[0072] Figure 11 Structure diagram of the locking assembly according to an embodiment of the present application;

[0073] Figure 12 Exploded view of the locking assembly according to an embodiment of the present application;

[0074] Figure 13 Exploded view of another locking assembly according to an embodiment of the present application;

[0075] Figure 14 Structure diagram of another well lid locking structure according to an embodiment of the present application.

[0076] Label Explanation

[0077] Cover 1, locking groove 11, lower boss 12, connecting block 13, slot 131, strip slot 1311, round slot 1312, reinforcing plate 14, positioning block 15, positioning seat 151, elastic positioning plate 152, positioning head 153, upper outer inclined surface 1531, lower outer inclined surface 1532, manhole cover seat 2, mounting groove 21, through hole 211, upper boss 22, front boss 221, first side boss 222, rear boss 223, second side boss 224, first reinforcing seat 225, second reinforcing seat 226, third reinforcing seat 227, fourth reinforcing seat 228, connecting groove 23, protruding block 231, positioning groove 24, upper inner inclined surface 241, lower inner inclined surface 242, locking assembly 3, locking seat 31, protruding part 311, recessed part 312, insertion hole 313, locking head 314, side plate 3141, side connecting arc plate 31411, side connecting vertical plate 31412, outer vertical surface 31413, first limiting surface 31414, second limiting surface 31415, limiting opening 31416, bottom plate 3142, driving groove 3143, locking rod 315, channel 3151, limiting piece 32, body 321, limiting protruding block 322, protection head 323, gap 324, connecting piece 33, connecting rod 331, connecting head 332, fixed seat 4, cavity 41, accommodation opening 42, side fixed plate 43, bottom fixed plate 44. DETAILED DESCRIPTION

[0078] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0079] As shown in Figures 1 to 14 A manhole cover locking structure of the present application comprises a cover 1, a manhole cover seat 2 and a locking assembly 3. The cover 1 is provided with an outwardly opening locking groove 11 on the outer side thereof, and is arranged on the manhole cover seat 2. The manhole cover seat 2 is provided with an inwardly opening mounting groove 21 on the inner side thereof, and the mounting groove 21 is arranged opposite to the locking groove 11. The locking assembly 3 comprises a locking seat 31 and a limiting piece 32. The locking seat 31 is rotatably arranged on the mounting groove 21 so that the protruding part 311 is located on the locking groove 11 or the protruding part 311 is not located on the locking groove 11. When the protruding part 311 is not located on the locking groove 11, the recessed part 312 does not contact the locking groove 11. The limiting piece 32 is arranged on the locking seat 31 and the manhole cover seat 2 to prevent the locking seat 31 from rotating.

[0080] Thus, the well lid locking structure of the present application, when in use, installs the cover 1 on the well lid seat 2, so that the installation groove 21 is opposite to the locking groove 11, then installs the locking seat 31, so that the locking seat 31 is rotatably arranged on the installation groove 21, when locking, rotates the locking seat 31, so that the protruding part 311 of the locking seat 31 is above the locking groove 11, finally inserts the limiting part 32 into the installation groove 21, so that the limiting part 32 contacts with the locking seat 31 and the well lid seat 2 to prevent the locking seat 31 from rotating, thus, the present application limits the locking seat 31 by arranging the locking seat 31 and the limiting part 32, so that the locking seat 31 can be effectively prevented from rotating, and the cover 1 is not easy to separate from the well lid seat 2.

[0081] When the cover 1 needs to be opened, the limiting part 32 is taken out, then the locking seat 31 is rotated, so that the protruding part 311 of the locking seat 31 is not above the locking groove 11, at this time, the recessed part 312 of the locking seat 31 is opposite to the locking groove 11, and the recessed part 312 does not contact with the locking groove 11, so that the cover 1 is not limited by the locking seat 31, thereby realizing the opening of the cover 1. When the cover 1 needs to be closed, the cover 1 is placed on the well lid seat 2 again, the locking seat 31 is rotated, so that the protruding part 311 of the locking seat 31 is above the locking groove 11, finally the limiting part 32 is inserted into the installation groove 21 to lock, thus, the present application is convenient for locking and opening the cover 1, and the locking structure is not easy to be damaged.

[0082] Optionally, the upper convex seat 22 is arranged on the inner side of the well lid seat 2, and the lower convex seat 12 for abutting on the upper convex seat 22 is arranged on the bottom of the cover 1. By arranging the upper convex seat 22 and the lower convex seat 12, when installing, the cover 1 is placed on the well lid seat 2, then the lower convex seat 12 abuts on the upper convex seat 22, thereby supporting the cover 1, and after the lower convex seat 12 abuts on the upper convex seat 22, the installation groove 21 is just opposite to the locking groove 11, thereby facilitating the locking of the locking seat 31.

[0083] In the example, the upper convex seat 22 comprises a front convex seat 221, a first side convex seat 222, a rear convex seat 223 and a second side convex seat 224 arranged in sequence, a first reinforcing seat 225 is arranged between the front convex seat 221 and the first side convex seat 222, a second reinforcing seat 226 is arranged between the first side convex seat 222 and the rear convex seat 223, a third reinforcing seat 227 is arranged between the rear convex seat 223 and the second side convex seat 224, and a fourth reinforcing seat 228 is arranged between the second side convex seat 224 and the front convex seat 221.

[0084] By setting the first reinforcing seat 225, the strength between the front convex seat 221 and the first side convex seat 222 is increased, by setting the second reinforcing seat 226, the strength between the first side convex seat 222 and the rear convex seat 223 is increased, by setting the third reinforcing seat 227, the strength between the rear convex seat 223 and the second side convex seat 224 is increased, and by setting the fourth reinforcing seat 228, the strength between the second side convex seat 224 and the front convex seat 221 is increased, so that the upper convex seat 22 has sufficient strength.

[0085] In some examples, the locking assembly 3 further comprises a connecting piece 33 fixed on the mounting groove 21 through the locking seat 31. By setting the connecting piece 33, the locking seat 31 can be limited on the mounting groove 21 during installation, realizing that the locking seat 31 is rotatably arranged on the mounting groove 21, preventing the locking seat 31 from separating from the lid seat 2.

[0086] Among them, the connecting piece 33 includes a connecting rod 331 and a connecting head 332, one end of the connecting rod 331 is fixed on the lid seat 2, and the connecting head 332 is connected with the other end of the connecting rod 331, and the outer diameter of the connecting head 332 is greater than that of the connecting rod 331. The locking seat 31 can be provided with a hole 313 for the connecting rod 331 to insert, and the hole diameter of the hole 313 is equal to or slightly larger than the outer diameter of the connecting rod 331. Specifically, in use, the connecting rod 331 is inserted through the hole 313 of the locking seat 31, so that the locking seat 31 can rotate around the connecting rod 331, and after the connecting rod 331 is fixed on the mounting groove 21, the locking seat 31 is located between the mounting groove 21 and the connecting head 332, thereby limiting the locking seat 31 on the lid seat 2, preventing the locking seat 31 from separating from the lid seat 2.

[0087] In this example, the groove bottom of the mounting groove 21 is provided with a through hole 211 for the connecting rod 331 to pass through. By setting the through hole 211, it is convenient to connect the connecting rod 331 with the through hole 211, wherein the through hole 211 is provided with an internal thread, and the outer side of the connecting rod 331 is provided with an external thread matched with the internal thread. Specifically, in connection, the connecting head 332 is rotated to make the connecting rod 331 rotate synchronously, and the connecting rod 331 is locked on the lid seat 2 through the cooperation of the internal thread and the external thread.

[0088] In some examples, the fixed seat 4 is arranged at the bottom of the manhole cover seat 2 and below the mounting groove 21. A cavity 41 is formed in the fixed seat 4 and communicates with the through hole 211. The cavity 41 communicates with the outside through a gap 42. After the connecting piece 33 is fixed on the mounting groove 21, the end of the connecting piece 33 protrudes from the through hole 211, so that the end of the connecting piece 33 is located in the cavity 41. At this time, the end of the connecting piece 33 can be welded in the cavity 41, thereby further enhancing the connection strength between the connecting piece 33 and the manhole cover seat 2, effectively preventing the connecting piece 33 from being separated from the manhole cover seat 2, thereby preventing the locking seat 31 from being separated from the manhole cover seat 2. By arranging the gap 42, the welding torch can pass through the gap 42 and contact the end of the connecting rod 331 and the inside of the fixed seat 4 during welding.

[0089] Since the manhole cover is used in a harsh environment, after the connecting rod 331 is locked on the manhole cover seat 2 by the cooperation of the internal thread and the external thread, the connecting piece 33 may be loose when the vehicle passes over the manhole cover. After a long time, the connecting piece 33 will be separated from the manhole cover seat 2. Therefore, in the present embodiment, the end of the connecting piece 33 is welded in the cavity 41, which effectively prevents the connecting piece 33 from being separated from the manhole cover seat 2.

[0090] Further, the fixed seat 4 includes a side fixed plate 43 and a bottom fixed plate 44. The upper end of the side fixed plate 43 is fixed to the bottom of the manhole cover seat 2. The gap 42 is arranged on the side of the side fixed plate 43. The bottom fixed plate 44 is fixed to the lower end of the side fixed plate 43. By arranging the side fixed plate 43 and the bottom fixed plate 44, the side of the welding agent is connected to the side fixed plate 43 and the bottom of the welding agent is connected to the bottom fixed plate 44 during welding, thereby increasing the welding area between the connecting rod 331 and the manhole cover seat 2 and firmly fixing the connecting rod 331 on the manhole cover seat 2.

[0091] In some examples, the inner side of the side fixed plate 43 includes a first vertical surface, a curved surface, and a second vertical surface. One end of the curved surface is connected to the first vertical surface. The second vertical surface is connected to the other end of the curved surface. In this way, the welding agent is firmly connected to the first vertical surface, the curved surface, and the second vertical surface during welding, thereby firmly fixing the connecting rod 331 on the manhole cover seat 2. The bottom fixed plate 44 is provided with a connecting surface. One side of the connecting surface is connected to the first vertical surface. The other side of the connecting surface is connected to the second vertical surface. The end of the connecting surface is connected to the curved surface. The welding agent is firmly connected to the connecting surface, thereby firmly fixing the connecting rod 331 on the manhole cover seat 2.

[0092] In the present example, the connecting surface is in a horizontal state. Of course, the connecting surface can also be in an inclined state. The distance between the connecting surface and the manhole cover seat gradually decreases from the direction close to the curved surface to the direction away from the curved surface. In this way, the melted welding agent flows along the connecting surface to the curved surface, thereby preventing the welding from flowing out of the fixed seat 4.

[0093] Further, the locking groove 11 is a semi-arc-shaped groove, so as to facilitate the rotation of the locking seat 31 to make the protruding part 311 located on the locking groove 11.

[0094] In some examples, the manhole cover seat 2 is provided with a connecting groove 23 on one side, and the side wall of the connecting groove 23 is provided with a protrusion 231; the cover body 1 is provided with a connecting block 13 matched with the connecting groove 23, and the connecting block 13 is provided with a slot 131 for inserting the protrusion 231, so that the cover body 1 can be rotatably arranged on the manhole cover seat 2. By arranging the connecting groove 23 and the connecting block 13, one end of the cover body 1 and one end of the manhole cover seat 2 are rotatably connected, and the other end of the cover body 1 and the other end of the manhole cover seat 2 are locked by the locking assembly 3.

[0095] Specifically, as shown in Figure 7 the protrusion 231 is in the shape of a cuboid; the slot 131 includes a strip slot 1311 and a circular slot 1312 in communication with the strip slot 1311, one end of the strip slot 1311 is in communication with the outside, and the circular slot 1312 is arranged at the other end of the strip slot 1311, the inner diameter of the circular slot 1312 is greater than the width of the strip slot 1311, and the width of the strip slot 1311 is equal to or slightly greater than the length of the protrusion 231. During installation, the cover body 1 is first inclined at a certain angle, and then the protrusion 231 is inserted into the circular slot 1312 along the strip slot 1311, so that the one end of the cover body 1 is connected with the one end of the manhole cover seat 2. When the cover body 1 needs to be opened, the cover body 1 is rotated along the manhole cover seat 2, and since the width of the strip slot 1311 is equal to or slightly greater than the length of the protrusion 231, the protrusion 231 can be separated from the slot 131 after the cover body 1 is rotated to a specified angle, so that the cover body 1 is not easy to be separated from the manhole cover seat 2 during rotation.

[0096] In some examples, one side wall of the connecting groove 23 is provided with a first protrusion 231, and the other side wall of the connecting groove 23 is provided with a second protrusion 231; one side of the connecting block 13 is provided with a first slot 131 matched with the first protrusion 231, and the other side of the connecting block 13 is provided with a second slot 131 matched with the second protrusion 231. By arranging the first protrusion 231 and the second protrusion 231, and by arranging the first slot 131 and the second slot 131, the rotation of the cover body 1 along the manhole cover seat 2 is more smooth.

[0097] The cover body 1 in the present example is provided with staggered reinforcing plates 14 at the bottom. By arranging the reinforcing plates 14, the overall strength of the cover body 1 is greater, and it can withstand greater pressure and is not easy to deform.

[0098] The reinforcing plates 14 include a first horizontal reinforcing plate 14, a second horizontal reinforcing plate 14, a first vertical reinforcing plate 14, a second vertical reinforcing plate 14, a third vertical reinforcing plate 14, and a ring-shaped reinforcing plate 14, the ring-shaped reinforcing plate 14 being connected to the ends of the first horizontal reinforcing plate 14, the second horizontal reinforcing plate 14, the first vertical reinforcing plate 14, the second vertical reinforcing plate 14, and the third vertical reinforcing plate 14, and the locking groove 11 being located on the outer side of the ring-shaped reinforcing plate 14. By arranging the first horizontal reinforcing plate 14, the second horizontal reinforcing plate 14, the first vertical reinforcing plate 14, the second vertical reinforcing plate 14, the third vertical reinforcing plate 14, and the ring-shaped reinforcing plate 14 in a staggered manner, the cover 1 has greater strength.

[0099] In some examples, the cover 1 is provided with a positioning block 15, and the well lid seat 2 is provided with a positioning groove 24 for the positioning block 15 to be inserted into. By arranging the positioning block 15 and the positioning groove 24, after the cover 1 is connected to the well lid seat 2, the positioning block 15 is inserted into the positioning groove 24, thereby preventing the cover 1 from shaking left and right under the rolling of a vehicle and preventing the cover 1 from shaking and affecting the locking seat 31.

[0100] As shown in Figure 8 Further, the positioning block 15 includes a positioning seat 151 and an elastic positioning plate 152 fixed on the positioning seat 151, the elastic positioning plate 152 is in an arc shape, the elastic positioning plate 152 forms a deformation space in front of the well lid seat 2, and the elastic positioning plate 152 is provided with a positioning head 153 at the end thereof. After the cover 1 is placed on the well lid seat 2, the positioning head 153 tightly abuts against the positioning groove 24 under the action of the elastic positioning plate 152, thereby preventing the positioning head 153 from being separated from the positioning groove 24.

[0101] The positioning head 153 includes an upper outer inclined surface 1531 and a lower outer inclined surface 1532, the upper portion of the positioning groove 24 is provided with an upper inner inclined surface 241 matched with the upper outer inclined surface 1531, and the lower portion of the positioning groove 24 is provided with a lower inner inclined surface 242 matched with the lower outer inclined surface 1532. During the process of placing the cover 1 on the well lid seat 2, the lower outer inclined surface 1532 is clamped into the lower inner inclined surface 242, and the upper outer inclined surface 1531 is clamped into the upper inner inclined surface 241, thereby preventing the cover 1 from shaking up and down.

[0102] In the present example, the angle formed by the plane in which the upper outer inclined surface 1531 is located and the plane in which the lower outer inclined surface 1532 is located is an obtuse angle; the angle formed by the plane in which the upper inner inclined surface 241 is located and the plane in which the lower inner inclined surface 242 is located is an obtuse angle. In this way, after the lower outer inclined surface 1532 is clamped into the lower inner inclined surface 242 and the upper outer inclined surface 1531 is clamped into the upper inner inclined surface 241, a relatively large force is required to separate the cover 1 from the well lid seat 2, so that the cover 1 is not prone to shaking up and down during the rolling of a vehicle.

[0103] As an example, the locking seat 31 comprises a locking head 314 and a locking rod 315, the locking head 314 is provided with the protrusion 311 and the recess 312, the locking rod 315 is fixedly connected to the bottom of the locking head 314, the outer diameter of the locking rod 315 is smaller than that of the locking head 314, and the locking rod 315 is provided with a channel 3151 for the connector 33 to pass through. The plane where the bottom of the installation groove 21 is located is lower than the plane where the bottom of the locking groove 11 is located. By arranging the locking rod 315, the locking rod 315 plays a compensating role, so that the bottom of the locking head 314 is just above or slightly higher than the plane where the bottom of the locking groove 11 is located, and it is ensured that the protrusion 311 of the locking head 314 can be located above the locking groove 11.

[0104] In addition, the inner diameter of the channel 3151 is equal to or slightly larger than the outer diameter of the connecting rod 331, so that the locking seat 31 will not shake left and right, and the locking seat 31 is more stable when rotating.

[0105] In some examples, the locking head 314 comprises a side plate 3141 and a bottom plate 3142, the bottom plate 3142 is fixedly connected to the bottom of the side plate 3141, and the bottom plate 3142 is provided with an abutting surface matched with the bottom of the locking groove 11. When locking, after the protrusion 311 is located above the locking groove 11, the bottom of the locking groove 11 is in contact with the abutting surface, thereby preventing the cover body 1 from being separated from the manhole cover seat 2.

[0106] In the example, the side plate 3141 protrudes from the connecting head 332, that is, the height of the side plate 3141 is higher than the height of the locking head 314, so that the locking head 314 is not easy to contact with the wheels of the vehicle, thereby preventing the connecting head 332 from bearing pressure and causing the connector 33 to be separated from the manhole cover seat 2. At the same time, it is convenient for the end of the screwdriver to be smoothly inserted into the driving groove 3143.

[0107] Further, the top of the locking head 314 is provided with a driving groove 3143 for driving the locking head 314 to rotate, and by arranging the driving groove 3143, it is convenient to drive the locking head 314 to rotate so that the protrusion 311 is located above or not above the locking groove 11.

[0108] The driving groove 3143 comprises a first driving groove 3143 and a second driving groove 3143, and the axial center line of the first driving groove 3143 coincides with the axial center line of the second driving groove 3143. In this way, a tool such as a flathead screwdriver can be inserted into the first driving groove 3143 and the second driving groove 3143, and the screwdriver is rotated to drive the locking head 314 to rotate, thereby realizing that the protrusion 311 is located above or not above the locking groove 11.

[0109] As an example, the side plate 3141 includes a side connecting arc plate 31411 and a side connecting vertical plate 31412, the side connecting arc plate 31411 forms the protrusion 311 with the bottom plate 3142, and the side connecting vertical plate 31412 forms the recess 312 with the bottom plate 3142. The outer side of the side connecting vertical plate 31412 forms an outer side vertical surface 31413, and the plane where the outer side vertical surface 31413 is located is parallel to the plane where the groove wall of the second driving groove 3143 is located. By arranging the outer side vertical surface 31413, it is convenient to connect with the limiting piece 32, so that the limiting piece 32 abuts against the outer side vertical surface 31413 to prevent the locking seat 31 from rotating. The distance between the side connecting vertical plate 31412 and the through hole 21 is greater than the distance between the side connecting vertical plate 31412 and the through hole 21.

[0110] In some examples, the height of the side connecting vertical plate 31412 is less than the height of the side connecting arc plate 31411, one end of the side connecting vertical plate 31412 forms a first limiting surface 31414, the other end of the side connecting vertical plate 31412 forms a second limiting surface 31415, and the second limiting surface 31415, the first limiting surface 31414 and the top of the side connecting vertical plate 31412 form a limiting opening 31416. By arranging the limiting opening 31416, it is convenient to cooperate with the limiting piece 32, thereby effectively preventing the locking seat 31 from rotating.

[0111] The limiting piece 32 in the example includes a body 321 and a limiting block 322, one side of the body 321 abuts against the side wall of the mounting groove 21, the other side of the body 321 abuts against the side connecting vertical plate 31412, the limiting block 322 is arranged on the upper end of the body 321, and the limiting block 322 is clamped into the limiting opening 31416. When installing the limiting piece 32, the body 321 is inserted into the gap between the locking seat 31 and the mounting groove 21, one side of the body 321 abuts against the side wall of the mounting groove 21, the other side of the body 321 abuts against the side connecting vertical plate 31412, and at the same time, the limiting block 322 is clamped into the limiting opening 31416, thereby effectively preventing the locking seat 31 from rotating.

[0112] Optionally, one side of the limiting block 322 abuts against the first limiting surface 31414, the other side of the limiting block 322 abuts against the second limiting surface 31415, and the bottom of the limiting block 322 abuts against the top of the side connecting vertical plate 31412, so that the limiting block 322 is closely matched with the limiting opening 31416, and the locking seat 31 is further prevented from rotating.

[0113] In some examples, the body 321 gradually decreases in width from the direction close to the limiting protrusion 322 to the direction away from the limiting protrusion 322, wherein the outer side of the body 321 is provided with a first inclined surface, one side of the body 321 is provided with a second inclined surface, the inner side of the body 321 is provided with a vertical surface, and the other side of the body 321 is provided with a third inclined surface, and the third inclined surface, the vertical surface, the second inclined surface and the first inclined surface are connected together in a head-to-tail manner. That is, by providing the first inclined surface, the second inclined surface and the third inclined surface, the body 321 gradually decreases from top to bottom, so that the limiting piece 32 is easily inserted into the gap formed between the mounting groove 21 and the locking seat 31, and as the insertion depth increases, the limiting piece 32 is tightly fitted with the mounting groove 21 and the locking seat 31, further preventing the locking seat 31 from loosening.

[0114] The body 321 in the present example is in interference fit with the mounting groove 21, so that the limiting piece 32 can be tightly fitted with the mounting groove 21 and the locking seat 31 to prevent the locking seat 31 from loosening.

[0115] In the present example, the end of the limiting protrusion 322 is provided with a protective head 323 abutting on the connecting head 332. By providing the protective head 323 and placing the protective head 323 on the connecting head 332, the connecting head 332 can be protected from being directly exposed to the outside, wherein the protective head 323 can be made of soft material, the protective head 323 is located in the groove formed by the side connecting arc plate 31411, and the surface of the protective head 323 is flush with the upper end of the side connecting arc plate 31411, so that the manhole cover seat 2 is not easily separated from the vehicle rolling on the protective head 323. At the same time, by providing the protective head 323, when the limiting piece 32 needs to be opened, a tool can be used to hook the side of the protective head 323 through the driving groove 3143, and the limiting piece 32 can be pulled out of the manhole cover seat 2 by upward force.

[0116] The edge of the protective head 323 in the present example is formed with a rounded corner, so that when the vehicle passes over the protective head 323, the edge of the protective head 323 is not easy to be raised, and the protective head 323 is more difficult to be separated from the manhole cover seat 2.

[0117] In some examples, a gap 324 is formed between the limiting protrusion 322 and the vertical surface. By providing the gap 324, when the limiting piece 32 needs to be opened, a tool can be used to hook the limiting piece 32 from the bottom, so that the tool abuts on the bottom of the limiting protrusion 322, and the limiting piece 32 is driven to separate from the mounting groove 21 by upward force, so that the locking seat 31 loses the restraint of the limiting piece 32, and the rotation of the locking seat 31 is realized.

[0118] The application further provides a well lid locking method, comprising the following steps: S1, placing the cover 1 on the well lid seat 2 so that the mounting groove 21 is opposite to the locking groove 11; S2, placing the locking seat 31 on the mounting groove 21; S3, fixing the connecting piece 33 on the mounting groove 21 after passing through the locking seat 31 so that the locking seat 31 can rotate along the mounting groove 21; S4, rotating the locking seat 31 so that the protruding part 311 of the locking seat 31 is above the locking groove 11; and S5, inserting the limiting piece 32 into the mounting groove 21 so that one side of the limiting piece 32 abuts against the sidewall of the mounting groove 21 and the other side of the limiting piece 32 abuts against the locking seat 31.

[0119] When locking, the locking seat 31 is rotated so that the protruding part 311 of the locking seat 31 is above the locking groove 11, and finally the limiting piece 32 is inserted into the mounting groove 21 so that the limiting piece 32 contacts the locking seat 31 and the well lid seat 2 to prevent the locking seat 31 from rotating. When the cover 1 needs to be opened, the limiting piece 32 is removed, and then the locking seat 31 is rotated so that the protruding part 311 of the locking seat 31 is not above the locking groove 11, at this time, the recessed part 312 of the locking seat 31 is opposite to the locking groove 11 and does not contact the locking groove 11, so that the cover 1 is not limited by the locking seat 31, thereby realizing the opening of the cover 1.

[0120] Optionally, in step S3, the end of the connecting piece 33 protrudes from the groove bottom of the mounting groove 21, and the end of the connecting piece 33 is welded on the fixing seat 4. After the connecting piece 33 is fixed, the end of the connecting piece 33 can be welded on the fixing seat 4, so that the connecting piece 33 is firmly fixed on the well lid seat 2.

[0121] In the example, in step S3, a gap is formed between the bottom of the locking seat 31 and the groove bottom of the mounting groove 21. Specifically, the distance between the bottom of the connecting head 322 and the groove bottom of the mounting groove 21 is slightly greater than the distance between the bottom plate 3142 and the bottom of the locking rod 315, so that the locking seat 31 rotates more smoothly, and the locking seat 31 is prevented from being too tight and not easy to rotate.

[0122] Compared with the prior art, the application sets the locking seat 31 and the limiting piece 32. When locking, the locking seat 31 is rotated so that the protruding part 311 of the locking seat 31 is above the locking groove 11, and finally the limiting piece 32 is inserted into the mounting groove 21, so that the locking seat 31 can be effectively prevented from rotating, and the cover 1 is not easy to separate from the well lid seat 2.

[0123] The above embodiments and drawings are not limited to the product shape and style of the application, and any appropriate changes or modifications made by those skilled in the art shall be considered as not departing from the patent scope of the application.

Claims

1. A lock securing structure for a manhole cover, characterized by: The utility model provides a manhole cover locking device, including cover, well lid seat and locking assembly; The cover is provided with a locking groove opening outward on the outer side, and the cover is arranged on the well lid seat; The inner side of the well lid seat is provided with a mounting groove opening inward, and the mounting groove is arranged opposite to the locking groove; The locking assembly comprises a locking seat, a limiting piece and a connecting piece, the side of the locking seat forms a protruding part and a recessed part, the locking seat is rotatably arranged on the mounting groove so that the protruding part is located on the locking groove or the protruding part is not located on the locking groove, when the protruding part is not located on the locking groove, the recessed part does not contact the locking groove, the limiting piece is arranged on the locking seat and the well lid seat to prevent the locking seat from rotating, the connecting piece is fixed on the mounting groove after penetrating through the locking seat, the connecting piece comprises a connecting rod and a connecting head, one end of the connecting rod is fixed on the well lid seat, the connecting head is connected with the other end of the connecting rod, and the outer diameter of the connecting head is larger than that of the connecting rod; The locking seat comprises a locking head and a locking rod, the side of the locking head forms the protruding part and the recessed part, the locking rod is fixedly connected to the bottom of the locking head, the outer diameter of the locking rod is smaller than that of the locking head, and a channel is formed in the locking rod for the connecting piece to pass through; the locking head comprises a side plate and a bottom plate, the bottom plate is fixed to the bottom of the side plate, and the bottom of the bottom plate forms an abutting surface matched with the groove bottom of the locking groove; the side plate comprises a side connecting arc plate and a side connecting vertical plate, the side connecting arc plate and the bottom plate form the protruding part, the side connecting vertical plate and the bottom plate form the recessed part, the outer side of the side connecting vertical plate forms an outer vertical surface, the height of the side connecting vertical plate is smaller than that of the side connecting arc plate, one end of the side connecting vertical plate forms a first limiting surface, the other end of the side connecting vertical plate forms a second limiting surface, and a limiting opening is formed between the second limiting surface, the first limiting surface and the top of the side connecting vertical plate; The limiting piece comprises a body and a limiting protrusion, one side of the body abuts against the side wall of the mounting groove, the other side of the body abuts against the side connecting vertical plate, the limiting protrusion is arranged on the upper end of the body, and the limiting protrusion is clamped into the limiting opening; one side of the limiting protrusion abuts against the first limiting surface, the other side of the limiting protrusion abuts against the second limiting surface, and the bottom of the limiting protrusion abuts against the top of the side connecting vertical plate; the width of the body gradually decreases from the direction close to the limiting protrusion to the direction away from the limiting protrusion; a first inclined surface is arranged on the outer side of the body, a second inclined surface is arranged on one side of the body, a vertical surface is arranged on the inner side of the body, a third inclined surface is arranged on the other side of the body, and the third inclined surface, the vertical surface, the second inclined surface and the first inclined surface are connected together in sequence; the body is in interference fit with the mounting groove.

2. The well lid locking structure according to claim 1, wherein: The inner side of the well lid seat is provided with an upper convex seat, and the bottom of the cover is provided with a lower convex seat for abutting against the upper convex seat.

3. The cover locking structure according to claim 2, wherein: The upper convex seat comprises a front convex seat, a first side convex seat, a rear convex seat and a second side convex seat arranged in sequence, a first reinforcing seat is arranged between the front convex seat and the first side convex seat, a second reinforcing seat is arranged between the first side convex seat and the rear convex seat, a third reinforcing seat is arranged between the rear convex seat and the second side convex seat, and a fourth reinforcing seat is arranged between the second side convex seat and the front convex seat.

4. The well lid locking structure according to claim 1, wherein: The utility model further comprises a fixing seat arranged on the bottom of the well lid seat and located below the mounting groove, and a cavity in communication with the through hole is formed in the fixing seat.

5. The well lid locking structure according to claim 1, wherein: One side of the well lid seat is provided with a connecting groove, and a protrusion is arranged on the side wall of the connecting groove; a connecting block matched with the connecting groove is arranged on the cover, and a slot for inserting the protrusion is arranged on the connecting block so that the cover can be rotatably arranged on the well lid seat.

6. A method of locking a manhole cover based on the manhole cover locking structure according to any one of claims 1 to 5, characterized by: The utility model comprises the following steps: S1, place the cover on the well lid seat, so that the installation groove is opposite the locking groove; S2, place the locking seat on the installation groove; S3, use the connecting piece to pass through the locking seat and be fixed on the installation groove, so that the locking seat can rotate along the installation groove; S4, rotate the locking seat, so that the protruding part of the locking seat is above the locking groove; S5, insert the limiting piece into the installation groove, so that one side of the limiting piece abuts against the side wall of the installation groove, and the other side of the limiting piece abuts against the locking seat.

7. The method of claim 6, wherein: In step S3, the end of the connecting piece protrudes from the bottom of the installation groove, and the end of the connecting piece is welded on the fixing seat.

8. The method of claim 6, wherein: In step S3, an air gap is formed between the bottom of the locking head and the bottom of the installation groove.

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