CN2784464Y

CN2784464Y - Anti-theft cover for manhole

Info

Publication number: CN2784464Y
Application number: CN 200520024034
Authority: CN
Inventors: 邢建中
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-05-10
Filing date: 2005-05-10
Publication date: 2006-05-31
Anticipated expiration: 2015-05-10

Abstract

The utility model relates to an anti-theft well cover, which comprises a well cover plate and a well seat. The utility model is characterized in that the well cover plate is provided with a conical hole for opening. The diameter of a hole opening of the conical hole is less than the diameter of the hole bottom of the conical hole. A gap of the circumferential edge of the well cover plate and the inner side surface on a position limiting table of a well seat ring is less than or equal to 3.5 mm. A spanner rod of an opening spanner which is arranged and an opening head are two-body structures. The spanner rod is provided with a handle and a conical table. The middle part of the spanner rod is provided with an outer thread. An expansion cylinder is screwed by the spanner rod. The opening head is an expansion shape lock head, and is arranged on one end of the expansion cylinder. An inner thread and an inner light hole are arranged in the expansion cylinder. The expansion opening head and the inner light hole are provided with a plurality of longitudinal grooves. The outer diameter of the expansion opening head is matched with the hole opening of the conical hole of an anti-theft lock for a well cover. The expansion opening head is provided with a conical hole. The inner conical surface of the conical hole is matched with the outer conical surface of the conical table of the spanner rod. The anti-theft well cover has no an anti-theft lock, and the utility model has simple structure, firmness, reliability and good anti-theft performance.

Description

A kind of anti-stealing manhole cover

Technical field

The utility model relates to a kind of anti-stealing manhole cover.

Background technology

Cable shaft, following well and tap water pipe well are a lot of on the road now, the various aboveground well lids that are installed with, and losing of well lid is very serious, after well lid is lost, not only causes any property loss, and can cause personal injury.In order to prevent that well lid from losing, various anti-stealing manhole covers are disclosed, mainly be to add theftproof lock at well lid, what have uses padlock, and what have uses dead bolt.The former locks the son damage that gets rusty easily, and complex structure, and the latter is opened easily.Add theftproof lock, make the anti-stealing manhole cover structure complicated, increased the cost of anti-stealing manhole cover, theftproof lock is installed on the well lid plate that is arranged on ground, and the time has been grown the damage of can getting rusty.

Summary of the invention

In order to overcome the existing above-mentioned deficiency that adds the anti-stealing manhole cover of theftproof lock, the utility model provides a kind of simple in structure, anti-stealing manhole cover of not adding theftproof lock.

The technical solution of the utility model is the conical bore that unlatching usefulness is set at the upper face of well lid plate, reach in the conical bore with the unlatching head of the unlatching spanner of special use the well lid plate is drawn back, because the well lid plate weighs more than 30 kilograms, cover on the well seat, and the gap between well lid plate circumferential edge and the well seat ring inboard is very little, can't open the well lid plate with other instrument.

The utility model comprises well lid plate, well seat, at the well seat limiting stand is arranged, the well lid plate is installed in limiting stand, it is characterized in that: the upper face at the well lid plate has the conical bore of opening usefulness, general conical bore is arranged on the position near well lid plate circumferential edge, the orifice diameter of conical bore less than the hole of conical bore at the bottom of diameter; The angle of the axis that the bus of the internal conical surface of conical bore is vertical with the well lid plate relatively is generally 15 °-20 °; Well lid plate circumferential edge and well seat ring are not more than 3.5 millimeters in the gap between the medial surface on the limiting stand.For pick-proof, after the well lid plate covered on the well seat, the upper face of well lid plate was lower than well seat ring upper topside.

This anti-stealing manhole cover is disposing interrelated, the unlatching spanner when uncapping, open spanner and comprise wrenching bar, unlatching head with handle, wrenching bar is two body structures with opening head, one end of wrenching bar is a handle, the other end is the frustum of a cone, and wrenching bar is connected at the bottom of the roundlet of the frustum of a cone, and promptly the end face diameter of the frustum of a cone is greater than other axle profile diameter of hanging down of the frustum of a cone, there is one section external screw thread at the middle part of wrenching bar, and the angle of the bus of the frustum of a cone of wrenching bar and wrenching bar axis is generally 13 °-16 °; Expansion cylinder at the wrenching bar overcoat, said unlatching head is to expand to open head, unthreaded hole in one section internal thread and one section is arranged in the expansion cylinder, expansion cylinder is screwed in outside the wrenching bar by this internal thread, there are two grooves of symmetry in the expansion cylinder outside, expand opening head is one at an end of the interior unthreaded hole of expansion cylinder and both, with interior unthreaded hole some cannelures are arranged at the unlatching head that expands, the aperture of the external diameter of expansion unlatching head and the conical bore of anti-stealing manhole cover matches, the unlatching head that expands has an axial tubaeform conical bore, and the outer conical surface of the internal conical surface of conical bore and the frustum of a cone of wrenching bar matches.

This anti-stealing manhole cover does not have theftproof lock, and the well lid plate weighs more than 30 kilograms, leans on the deadweight of well lid plate to be pressed on the well seat, gap between well lid plate circumferential edge and the well seat ring inboard is very little, can't pry open, and is simple in structure, solid reliable, the conical bore tapering is little, and the conical bore side is smooth, can't open the well lid plate with other instrument, have only with unlatching spanner of the present utility model and could open the well lid plate, theftproof is good, is used with special-purpose unlatching spanner, and it is convenient to open.

Description of drawings

Fig. 1 is the structure chart of this anti-stealing manhole cover embodiment, all cuts open among the figure.

Fig. 2 is the enlarged drawing of left side among Fig. 1.

Fig. 3 is the structure chart of the unlatching spanner of this anti-stealing manhole cover configuration, vertically cuts open among the figure.

Fig. 4 is the structure chart of wrenching bar.

Fig. 5 is the axial sectional view of expansion cylinder.

Fig. 6 is to view along the A among Fig. 5.

Fig. 7 is the sectional view along A-A line among Fig. 5.

Fig. 8 is the reference diagram of installing and using of this anti-stealing manhole cover embodiment.

Fig. 3, Fig. 4, Fig. 5, Fig. 6, the relative Fig. 1 with Fig. 8 of Fig. 7 amplify.

Among the above-mentioned figure:

1, well lid plate 2, internal conical surface 3, conical bore 4, at the bottom of the hole 5, upper face 6, limiting stand 7, well seat ring 8, well seat 9, well seat ring upper topside 10, gap 11, open spanner 12, wrenching bar 13, handle 14, through hole 15, expansion nozzle 16, external screw thread 17, expansion cylinder 18, internal thread 19, interior unthreaded hole 20, expand to open 21, conical bore 22, the frustum of a cone 23, outer conical surface 24, cannelure 25, internal conical surface 26, expanding noodles 27, groove

The specific embodiment

Below in conjunction with the detailed structure of embodiment and this anti-stealing manhole cover of description of drawings thereof, but this anti-stealing manhole cover is not limited to following embodiment.

The anti-stealing manhole cover that Fig. 1 provides comprises well lid plate 1, well seat 8, at well seat 8 limiting stand 6 is arranged, well lid plate 1 is installed in limiting stand 6, it is characterized in that: the upper face 5 at well lid plate 1 has the conical bore 3 of opening usefulness, the conical bore 3 of present embodiment is arranged on the position near well lid plate circumferential edge, the orifice diameter of conical bore 3 less than the hole of conical bore at the bottom of 4 diameter, the orifice diameter of present embodiment conical bore 3 is 32 millimeters, 4 diameter is 38 millimeters at the bottom of the hole.The bus of the internal conical surface 2 of the conical bore 3 relatively angle of the axis vertical with well lid plate 1 is 15 °.The circumferential edge of well lid plate 1 and well seat ring 7 are 3 millimeters in the gap between the medial surface on the limiting stand 6 10.After well lid plate 1 covered on well seat 8, the upper face 5 of well lid plate 1 hanged down 1.5 millimeters than well seat ring upper topside 9.

Present embodiment is disposing the unlatching spanner 11 of cover plate 1 usefulness that drives a well, the unlatching spanner 11 that Fig. 3, Fig. 4 and Fig. 5 provide comprises wrenching bar 12, the unlatching head with handle 13, wrenching bar 12 is two body structures with opening head, wrenching bar 12 is tightening handle 13, the lower end is the frustum of a cone 22, wrenching bar 12 is connected at the bottom of the roundlet of the frustum of a cone 22, and promptly the end face diameter of the frustum of a cone 22 is greater than other axle profile diameter of hanging down of the frustum of a cone 22.There is one section external screw thread 16 at the middle part of wrenching bar 12, and the angle of the bus of the frustum of a cone 22 of wrenching bar and wrenching bar 12 axis is 14.5 °.Expansion cylinder 17 at wrenching bar 12 overcoats, said unlatching head is to expand to open 20, expand to open 20 in the lower end of expansion cylinder 17 and both be one, unthreaded hole 19 in one section internal thread 18 and one section is arranged in the expansion cylinder 17, expansion cylinder 17 is screwed in outside the wrenching bar 12 by internal thread 18, there are two grooves 27 of symmetry in expansion cylinder 17 outsides, referring to Fig. 7, expand and open 20 a end at interior unthreaded hole 19, with interior unthreaded hole 19 four cannelures 24 are arranged expand opening 20, referring to Fig. 6, the aperture of expand opening the conical bore 3 of 20 external diameter and anti-stealing manhole cover 1 matches, and present embodiment is 31.9 millimeters.Expand opening 20 has an axial tubaeform conical bore 21, and the internal conical surface 25 of conical bore 21 matches with the frustum of a cone 22 outer conical surface 23 of wrenching bar 12.

Fig. 8 is seen in the use of the unlatching spanner of installation of this anti-stealing manhole cover and configuration, in the time will driving a well cover plate 1, the expansion of opening spanner 11 is opened in the 20 insertion conical bore 3, rotating spanner bar 12, expand to open 20 locked with the conical bore 3 of well lid plate 1, upwards draw back and open spanner 11, can open well lid plate 1.

Claims

1, a kind of anti-stealing manhole cover, it comprises well lid plate, well seat, the well lid plate is installed in the limiting stand of well seat, it is characterized in that: at the upper face of well lid plate the conical bore of opening usefulness is arranged, the orifice diameter of conical bore less than the hole of conical bore at the bottom of diameter; The angle of the axis that the bus of the internal conical surface of conical bore is vertical with the well lid plate relatively is 15 °-20 °.

2, anti-stealing manhole cover according to claim 1 is characterized in that: well lid plate circumferential edge and well seat ring are not more than 3.5 millimeters in the gap between the medial surface on the limiting stand.

3, anti-stealing manhole cover according to claim 1 and 2 is characterized in that: after the well lid plate covered on the well seat, the upper face of well lid plate was lower than well seat ring upper topside.

4, anti-stealing manhole cover according to claim 1 and 2, it is characterized in that: also disposing the unlatching spanner, the wrenching bar of opening spanner is two body structures with opening head, one end of wrenching bar is a handle, the other end is the frustum of a cone, wrenching bar is connected at the bottom of the roundlet of the frustum of a cone, and there is one section external screw thread at the middle part of wrenching bar, and the angle of the bus of the frustum of a cone of wrenching bar and wrenching bar axis is 13 °-16 °; Expansion cylinder at the wrenching bar overcoat, said unlatching head is to expand to open head, unthreaded hole in one section internal thread and one section is arranged in the expansion cylinder, expansion cylinder is screwed in outside the wrenching bar by this internal thread, there are two grooves of symmetry in the expansion cylinder outside, expand opening head is one at an end of the interior unthreaded hole of expansion cylinder and both, with interior unthreaded hole some cannelures are arranged at the unlatching head that expands, the aperture of the external diameter of expansion unlatching head and the conical bore of anti-stealing manhole cover matches, the unlatching head that expands has an axial tubaeform conical bore, and the outer conical surface of the internal conical surface of conical bore and the frustum of a cone of wrenching bar matches.

5, anti-stealing manhole cover according to claim 3, it is characterized in that: also disposing the unlatching spanner, the wrenching bar of opening spanner is two body structures with opening head, one end of wrenching bar is a handle, the other end is the frustum of a cone, wrenching bar is connected at the bottom of the roundlet of the frustum of a cone, and there is one section external screw thread at the middle part of wrenching bar, and the angle of the bus of the frustum of a cone of wrenching bar and wrenching bar axis is 13 °-16 °; Expansion cylinder at the wrenching bar overcoat, said unlatching head is to expand to open head, unthreaded hole in one section internal thread and one section is arranged in the expansion cylinder, expansion cylinder is screwed in outside the wrenching bar by this internal thread, there are two grooves of symmetry in the expansion cylinder outside, expand opening head is one at an end of the interior unthreaded hole of expansion cylinder and both, with interior unthreaded hole some cannelures are arranged at the unlatching head that expands, the aperture of the external diameter of expansion unlatching head and the conical bore of anti-stealing manhole cover matches, the unlatching head that expands has an axial tubaeform conical bore, and the outer conical surface of the internal conical surface of conical bore and the frustum of a cone of wrenching bar matches.