CN101967921A - Anti-theft lock for manhole cover - Google Patents

Abstract

The invention relates to an anti-theft lock for a manhole cover, which belongs to the field of road facilities so that the manhole cover in the public place has anti-theft function. The anti-theft lock for the manhole cover consists of a lock bracket, a spring, an active column, a lock plug, a movable pin, a fixed pin and a key clamping board to form a whole set of lockset and the key matched with the lockset is used to unlock or lock the anti-theft lock. In implementation, the manhole cover can be used in the public place by manufacturing the anti-theft lock for the manhole cover matched with corresponding manhole cover and the manhole cover simultaneously or manufacturing the anti-theft lock for the manhole cover individually according to the prior manhole cover. The anti-theft lock for the manhole cover not only has simple structure, convenient installation, easy operation and low production cost, but also improves the anti-theft and anti-rust effects effectively and is very convenient for electric power, communication, water supply, drainage, fuel and thermal power departments and the like to apply at well mouths of related facility wells placed in the public place.

Description

Manhole antitheft lock

[technical field]

The present invention relates to road administration facility field, especially relate to a kind of manhole antitheft lock that can make well lid in the public arena possess anti-theft feature.

[background technology]

Known, the city farm-to-market road need be at provided underground such as water, electricity, communication or the like multiple pipeline, and be used to observe or overhaul the well head of subterranean pipe line, what great majority adopted is the well lid that cast iron materials is made, because the well lid of cast iron quality has certain recovery value, and the anti-theft measure that is used for well lid at present is imperfection very, so well lid is very easily stolen, light then because the disappearance of filling up well lid causes the property loss of country, heavy then because the trap that forms in the stolen road afterwards of well lid causes the personal injury incident; In addition, because stolen article lost or the damage that very easily causes in the subterranean pipe line of well lid, as cable in the subterranean pipe line of electric power or communication section or pipe fitting etc.; The imperfection of manhole cover anti-theft measure has not only strengthened the expense of relevant departments aspect safeguarding, the also corresponding expense of departments such as electric power, communication and tap water that caused strengthens, simultaneously, because the losing and damage of well lid, the pedestrian that on road, walks or the safety of vehicle have been threatened again, cause unnecessary loss therefore for the country and the common people, promptly caused the waste of unnecessary manpower and materials and loss economically accordingly; Now, the caused social concern of the problem of well lid safety has become a major hidden danger in the urban safety.

[summary of the invention]

In order to overcome the deficiency in the background technology, the invention discloses a kind of manhole antitheft lock, this manhole antitheft lock is not only easy for installation, and is simple to operate, and can effectively prevent losing of well lid and rain grid made.

For achieving the above object, the present invention adopts following technical scheme:

A kind of manhole antitheft lock, described manhole antitheft lock comprise lock frame, spring, movable post, locking bolt, removable pin, steady pin, key clamp and key; Described lock frame constitutes hollow structure by back side walls in face of the lock on top top and the lock top/bottom part; Side walls all is made as " U " word shape of hollow before and after the lock frame, is respectively equipped with outwards outstanding engaging lug in the two sides, front and back on lock top, and is equipped with vertical hole on two engaging lugs; Laterally and at interval be arranged with a plurality of holes uniformly at middle part, lock top, the aperture, two ends up and down in each hole all is the toroidal of outside bending; Described each hole internal upper part all is mounted with spring, and the spring bottom in each hole is mounted with movable post; The basal surface position that is positioned at the lock top in lock frame left side is provided with lockhole, and the width of lockhole is wider than the width between the medial surface of locking former and later two sidewalls of frame; Be provided with the tongue hole corresponding with lockhole in lock frame right side, the width in tongue hole is wider than the width between the medial surface of locking former and later two sidewalls of frame, and the medial surface that perhaps will be positioned at former and later two sidewalls of lock frame of below, tongue hole is interconnected to form the bottom surface in tongue hole; The position of the corresponding lockhole of the medial surface bottom surface of sidewall is respectively equipped with outstanding projection before and after the lock frame; The angle position of side is fixed with fixed head respectively before and after lock top bottom surfaces and the inner, tongue hole of lock frame, and the medial surface that the side walls correspondence is positioned at below the fixed head before and after the lock frame is interconnected to constitute limited block; The lock top upper side of described lock frame is equipped with and locks the supporting cover plate of top upper side;

Described locking bolt is positioned at the below, bottom surface, lock top of lock frame, and the identical lockhole that runs through of an end of locking bolt, and the other end of locking bolt coincide and runs through the tongue hole; The side of both sides is respectively equipped with an outstanding promotion post near the position in tongue hole before and after the locking bolt, and two promotion posts are in the horizontal level of alignment; The position in corresponding each hole of locking bolt is equipped with pin-and-hole, and the aperture, two ends up and down of pin-and-hole all is the toroidal of outside bending; Described locking bolt intimate is socketed with supporting corrosion-resistant pipe or the tight more supporting corrosion-resistant pipe of socket after plug face is smeared anti-corrosion material; The aperture of corresponding each the pin-and-hole upper end of corrosion-resistant pipe is equipped with the port identical with this aperture bore, and the aperture of corrosion-resistant pipe respective pin hole lower end is equipped with the port less than this aperture bore; Be mounted with in the pin-and-hole and the supporting removable pin of pin-and-hole internal diameter, the center, lower surface of removable pin is provided with outstanding post; Described outstanding post can coincide and stretch out the port in aperture, corrosion-resistant pipe respective pin hole lower end on the locking bolt; The position of corrosion-resistant pipe bottom surface between two pin-and-holes on the locking bolt is equipped with steady pin, and steady pin is no longer than the length of outstanding post;

Described key clamp comprises the limiting plate of a spill, two junction plates, two positioning strips and two blocks of right-angled trapezium plates; The limiting plate openend of described spill makes progress and the corresponding respectively front and back sides that is positioned at locking bolt of both sides, front and back wooden partition, and before and after the limiting plate fixedly connected with the junction plate bottom faces of a setting respectively in the top of both sides wooden partition; Described two junction plates middle part is respectively equipped with clamping and promotes the arc chute that post slides, and the chute two ends when static are in level; Described promotion post slides into the distance of the chute other end by an end of chute and equates with distance between two pin-and-hole centers; An end top in the same way of two junction plates is hinged on respectively on the corresponding fixed head; Described limiting plate bottom is lower than the bottom of outstanding post and steady pin, and two positioning strips that are provided with of spacing are arranged away from the side medium position in tongue hole in the bottom of limiting plate; The top end face of described positioning strip all is not higher than the bottom surface of locking bolt, and the bottom face of positioning strip all is not less than the bottom surface of lock frame; Positioning strip is positioned at part under the limiting plate bottom surface, and to be 30～60 degree angle lappings to the outside separately respectively oblique, and the widest part between two positioning strip sloping portions is not wider than the width between the wooden partition of limiting plate both sides; The positioning strip of sloping portion is fixedly connected with a right-angled trapezium plate respectively near the side in tongue hole; Limit between two right angles of described two blocks of right-angled trapezium plates is all towards the inboard, and the distance between while two right-angled trapezium plate medial surfaces is less than the distance between two positioning strip medial surfaces;

Described key comprises body, the shank of the key, push-pull handle, power transmission shaft, position-limiting tube and key bit; Described body is " L " shape pipe that is provided with the bending arc between the two ends; Described pipe diameter is less than the vertical spacing between the medial surface of part of the spacing between the medial surface of lock frame former and later two sidewalls and two positioning strips, and greater than the spacing between two right-angled trapezium plate medial surfaces; One end of body is fixedly connected with hinge; Described hinge is provided with axis hole along axial line; The catch of fixedly connected first annular in an end outer wall place that hinge is connected with body, the catch of fixedly connected second annular of other end termination outer wall of hinge is hinged with the shank of the key on the hinge outer wall between two catch; The other end of body is made as blind end, and being positioned at the bending arc has position-limiting tube in the inside of body near the fixed-site of body blind end; The external diameter of described position-limiting tube and the internal diameter of body coincide, and the body tube wall that is positioned at the position-limiting tube upper side open wide form uncovered; Body blind end end face opens wide to the tube wall upper side of the uncovered position of body and forms tube seat, and two trough rims of tube seat all are not higher than two uncovered opening edges; Be arranged with the projection of upper side and uncovered two opening edge levels respectively near the position of position-limiting tube in the trough rim upper side of tube seat; Described projection with uncovered between the recess that forms corresponding with the projection bottom surfaces of locking the frame left side; Be placed with the supporting key bit of bottom surface and inboard wall of tube body in the tube seat; The position of the corresponding key bit upper side of the trough rim of tube seat upper side both sides is fixed with compression bar respectively;

Described key bit upper side is horizontal plane and the upper side that is not higher than compression bar; One end end face center of the corresponding position-limiting tube of key bit is provided with outwards outstanding out screw rod, and the width of key bit is corresponding with the width of tube seat upper side notch, and the key bit upper side is respectively equipped with the groove of corresponding outstanding post and steady pin; When out screw rod one end of key bit attached position-limiting tube, the length between the distance between the other end of key bit and the body blind end and two the pin-and-hole centers was consistent; Described power transmission shaft comprises flexible axle mandrel and straight-bar; One end of described flexible axle mandrel in tube seat with an end crimping of tube connector, the other end of tube connector is provided with the internal thread hole and is connected with the out screw rod of key bit is supporting, the diameter of tube connector is greater than the internal diameter of position-limiting tube; Fixedly connected with an end of straight-bar behind the pore that the other end of flexible axle mandrel runs through position-limiting tube and the bending arc, the other end of straight-bar is hinged push-pull handle after running through the axis hole of hinge; Be provided with the plastics pillar between the inwall at described body bending arc place and the outer wall of flexible axle mandrel, and the plastics pillar is attached on the inwall at bending arc place; The limited pipe of one end of plastics pillar stops fixing, and a be fixed end of pipe of the other end of plastics pillar stops fixing; Described stationary pipes is between inboard wall of tube body and straight-bar outer wall, and the other end of stationary pipes is stopped fixing by hinge.

Described manhole antitheft lock, side and bottom surface are equipped with protective cover before and after the described lock frame, and the position of the corresponding engaging lug bottom surfaces in the opening two ends that protective cover makes progress is respectively equipped with outwards outstanding fillet, and the corresponding vertically position in hole is provided with connecting hole on the fillet; The bottom surfaces position of the bottom surfaces respective pin hole of protective cover is provided with downward depression, and the bottom surface of depression is respectively equipped with removable pin and is staggered mudhole.

Described manhole antitheft lock, described lock frame surface is coated with anti-corrosion material.

Described manhole antitheft lock, the inwall in described each hole that is provided with on the lock top of lock frame all closely is socketed with corresponding corrosion-resistant pipe, and the two ends mouth of pipe of corrosion-resistant pipe is joined with the two ends orifice shapes kiss in corresponding hole.

Described manhole antitheft lock, the corrosion-resistant pipe and the steady pin of described locking bolt and the socket of locking bolt intimate are made as integrative-structure.

Described manhole antitheft lock, described pin-and-hole inwall all closely are socketed with corresponding corrosion-resistant pipe, and the two ends mouth of pipe of corrosion-resistant pipe is joined with the two ends orifice shapes kiss of corresponding pin-and-hole.

Described manhole antitheft lock, described lockhole inwall closely are socketed with the corrosion-resistant pipe that corresponding bottom surface middle part disconnects, and the edge of the corrosion-resistant pipe two ends mouth of pipe can be with the tight attached fixedly tooth that is fixed in the corresponding lockhole of corrosion-resistant pipe after being protruding with bending respectively.

Described manhole antitheft lock, described tongue hole inwall closely are socketed with the corrosion-resistant pipe that corresponding bottom surface middle part disconnects, and the edge of the corrosion-resistant pipe two ends mouth of pipe can be with the tight attached fixedly tooth that is fixed in the corresponding tongue hole of corrosion-resistant pipe after being protruding with bending respectively.

Described manhole antitheft lock, two parts up and down of described outstanding post and steady pin are made as isometrical or waney shape, and two-part horizontal section can be made as polygonal, circle respectively, has pit or have protruding shape about outstanding post and the steady pin.

Described manhole antitheft lock, the termination that described locking bolt stretches out lock frame right side by the tongue hole is connected with the height regulating rod of regulating gap between locking bolt and the corresponding well seat bearing surface bottom surface.

Because adopt aforesaid technical scheme, the present invention has following beneficial effect:

Manhole antitheft lock of the present invention is not only simple in structure, easy operating and cost of production are low but also antitheft, antirust dead, supporting use when being suitable for departments such as electric power, communication, water supply, draining, combustion gas and heating power and settling related facility in public place.

[description of drawings]

Fig. 1 is a side schematic view of the present invention;

Fig. 2 is the schematic diagram after lock frame of the present invention is installed locking bolt;

Fig. 3 is a key schematic diagram of the present invention;

Fig. 4 is a lock frame vertical view of the present invention;

Fig. 5 is a lock frame of the present invention left side schematic diagram;

Fig. 6 is a lock frame of the present invention right side schematic diagram;

Fig. 7 is the locking bolt schematic diagram behind the setting height(from bottom) adjusting rod among the present invention;

Fig. 8 is a key clamp of the present invention left side schematic diagram;

Fig. 9 is the schematic diagram of protective cover of the present invention;

Figure 10 is a key bit schematic top plan view of the present invention;

Figure 11 is a key schematic top plan view of the present invention.

Among the figure: 1, lock frame; 2, spring; 3, movable post; 4, locking bolt; 5, removable pin; 6, steady pin; 7, key clamp; 8, key; 9, engaging lug; 10, vertical hole; 11, hole; 12, lockhole; 13, tongue hole; 14, projection; 15, limited block; 16, promote post; 17, pin-and-hole; 18, limiting plate; 19, junction plate; 20, positioning strip; 21, right-angled trapezium plate; 22, chute; 23, fixed head; 24, body; 25, the shank of the key; 26, push-pull handle; 27, power transmission shaft; 28, position-limiting tube; 29, key bit; 30, bending arc; 31, hinge; 32, catch; 33, uncovered; 34, tube seat; 35, projection; 36, compression bar; 37, groove; 38, flexible axle mandrel; 39, straight-bar; 40, protective cover; 41, fillet; 42, connecting hole; 43, depression; 44, mudhole; 45, height regulating rod; 46, recess; 47, plastics pillar; 48, stationary pipes; 49, tube connector; 50, out screw rod; 51, cover plate; 52, outstanding post.

[specific embodiment]

Can explain the present invention in more detail by the following examples, disclose purpose of the present invention and be intended to protect all changes and improvements in the scope of the invention that the present invention is not limited to the following examples;

1～11 described manhole antitheft lock in conjunction with the accompanying drawings, described theftproof lock comprise lock frame 1, spring 2, movable post 3, locking bolt 4, removable pin 5, steady pin 6, key clamp 7 and key 8; The back side walls constitutes hollow structure to described lock frame 1 by the lock on top top with in face of being positioned at the lock top/bottom part; Lock frame 1 front and back side walls all is made as " U " word shape of hollow, is convenient to assemble described theftproof lock by the hollow part on two sidewalls; The middle part that is respectively equipped with outwards outstanding 9, two engaging lugs 9 of engaging lug in the two sides, front and back on lock top is equipped with vertical hole 10, be convenient to by bolt will lock frame 1 firm be fixed on the well lid back side; Be arranged with the hole 11 on a plurality of perforation locks top in lateral separation, middle part, lock top, the aperture, two ends up and down in each hole 11 all is the toroidal of outside bending; Described each hole 11 internal upper part all are mounted with spring 2, and the bottom that is positioned at spring 2 in the hole 11 is mounted with movable post 3; The basal surface position that is positioned at the lock top in lock frame 1 left side is provided with lockhole 12, the width of lockhole 12 is wider than the width between the medial surface of locking frame 1 former and later two sidewalls, the medial surface that former and later two sidewalls of promptly locking frame 1 left end are positioned at bottom surface, lock top is respectively equipped with an inside depression, pushes up the bottom surface by depression on two sidewalls and lock between two depressions and forms a bottom lockhole 12 jaggy; Be provided with the tongue hole 13 corresponding with lockhole 12 in lock frame 1 right side, the width in tongue hole 13 is wider than the width between the medial surface of locking frame 1 former and later two sidewalls, the medial surface that former and later two sidewalls of promptly locking frame 1 right-hand member are positioned at bottom surface, lock top is respectively equipped with an inside depression, pushes up the bottom surface by depression on two sidewalls and lock between two depressions and forms tongue jaggy hole, a bottom 13; The medial surface that perhaps will be positioned at lock frame 1 former and later two sidewalls of 13 belows, tongue hole is interconnected to form the bottom surface in tongue hole 13, has promptly filled up the breach that 13 bottom surfaces, tongue hole are formed by the gap between the front and back sidewall of lock frame 1; The position of the corresponding lockhole of medial surface 12 bottom surfaces of lock frame 1 front and back sidewall is respectively equipped with outstanding projection 14, and the space between the projection 14 on the lock frame 1 front and back sidewall is greater than the diameter of outstanding post 52, be convenient to locking bolt 4 when mobile, outstanding post 52 can move between projection 14; Be fixed with fixed head 23 respectively in the lock top bottom surfaces of lock frame 1 and the angle position of both sides, 13 inner front and back, tongue hole, and the medial surface that the sidewall of lock frame 1 front and back lays respectively at corresponding fixed head 23 belows interconnects back formation limited block 15, because limited block 15 has limited the over-tilting of key clamp 7 when key clamp 7 is pushed, guaranteed effectively that therefore the blind end of key 8 can accurately be located when opening and closing lockset; The lock top upper side of described lock frame 1 is equipped with the cover plate 51 identical with locking upper side plane, top, after being about to described lock frame and supporting cover plate 51 and being fixed to the corresponding well lid back side, cover plate 51 not only can prevent to enter sewage dirt by the aperture, top in hole 11, and has protected hole 11 interior springs 2 can not influenced the normal use of activity post 3 and removable pin 5 by the ejection of upper hole degree of making a slip of the tongue;

Locking bolt 4 one ends that are positioned at the below, bottom surface, lock top of lock frame 1 coincide and run through lockhole 12, and the other end coincide and runs through tongue hole 13, and promptly when locking bolt 4 ran through peace and goes in lockhole 12 and the tongue hole 13, two sidewalls locking frame 1 had played the effect of effective support locking bolt 4; As required, can pass tongue hole 13 and stretch out the vertical height regulating rod 45 of termination pin joint of lock frame 1 right side at locking bolt 4, the effect of height regulating rod 45 is after described theftproof lock is locked, height regulating rod 45 is filled in the gap between the well seat bearing surface bottom surface corresponding with this end termination, the termination of locking bolt 4, at this moment, actual conditions according to the gap are carried out suitable shearing to height regulating rod 45, make between locking bolt 4 and the well seat and do not have the gap, just well lid is vibrated yet, therefore not only improve the coupling mechanism force of described theftproof lock, but also effectively reduced the possibility that well lid makes a noise because of vibration; The position of locking bolt 4 corresponding apertures 11 is provided with corresponding supporting pin-and-hole 17, and promptly the aperture of pin-and-hole 17 is identical with the aperture in hole 11, and the aperture, two ends up and down of each pin-and-hole 17 all is the toroidal of outside bending; Described locking bolt 4 intimate are socketed with supporting corrosion-resistant pipe or tight again socket corrosion-resistant pipe after locking bolt 4 external surfaces are smeared anti-corrosion material, the place, aperture, two ends up and down of each pin-and-hole 17 is provided with port respectively on the corresponding locking bolt 4 of corrosion-resistant pipe, and the port of the corrosion-resistant pipe end face all aperture bore with corresponding pin-and-hole 17 upper ends is identical, the port of corrosion-resistant pipe bottom surface is all less than the aperture of pin-and-hole 17 lower ends of correspondence, because removable pin 5 falls behind down in pin-and-hole 17, removable pin 5 is stopped by the port in the aperture, respective pin hole 17 lower end that the corrosion-resistant pipe bottom surface is provided with, and the outstanding post 52 that center, removable pin 5 lower surface is provided with can stretch out the bottom surfaces of locking bolt 4 by the port of corrosion-resistant pipe bottom surface, thereby has guaranteed that removable pin 5 can whole do not deviate from by the aperture, lower end of pin-and-hole 17; The position of the corrosion-resistant pipe bottom surface of socket on the locking bolt 4 between per two pin-and-holes 17 is equipped with steady pin 6, described steady pin 6 is all no longer than the length of giving prominence to post 52, the power that when steady pin 6 has disperseed key pull locking bolt 4 outstanding post 52 has been applied, make key bit 29 can drive locking bolt 4 fully and make corresponding action, played the outstanding post 52 of protection simultaneously, prolonged and give prominence to the post effect in 52 application lifes; As required, the corrosion-resistant pipe and the steady pin 6 of described locking bolt 4 and locking bolt 4 intimate sockets can be made as integrative-structure, be convenient to produce and install; The side of both sides, locking bolt 4 front and back is respectively equipped with an outstanding promotion post 16 near the position in tongue hole 13, described two promotion posts 16 are in the horizontal level of axial alignment, and do not influence locking bolt 4 by tongue hole 13 stretch out the lock frame 1 the right side reach locked position, promote post 16 and not only fixed bonding strength between the corrosion-resistant pipe of locking bolt 4 and locking bolt 4 external surface sockets, carry out corresponding action but also make locking bolt 4 when moving, can drive key clamp 7;

Described key clamp 7 comprises the limiting plate 18 of a spill, two junction plates 19, two positioning strips 20 and two blocks of right-angled trapezium plates 21; Limiting plate 18 openends of described spill upwards and the gapped respectively correspondence of both sides, front and back wooden partition be positioned at the side of the both sides, front and back of locking bolt 4, the top of both sides, limiting plate 18 front and back wooden partition is respectively with corresponding to be junction plate 19 bottoms of erectting shape fixedly connected; The middle part of described two junction plate 19 risers is respectively equipped with the arc chute 22 that penetrates junction plate 19 plate faces of symmetry; Two junction plates 19 are hinged on respectively on the corresponding fixed head 23 near an end top in tongue hole 13, can be that corresponding action is made in the center of circle along the pin joint of junction plate 19 and fixed head 23 thereby make key clamp 7; Described chute 22 is the arcuation form near " V " type, and the minimum point in the arc chute 22 to the distance of low order end is longer than minimum point in the chute 22 to the distance of high order end; Clampings promote posts 16 in the chute 22 of arc, when locking bolt 4 is moved by push-and-pull, can drive key clamp 7 and make corresponding actions by promoting post 16 moving in chute 22; Because chute 22 is being unblanked fully or is being the state of both ends horizontal during locking, key clamp 7 is in the state that is tilted to the right simultaneously, therefore when locking bolt 4 actions, key clamp 7 is pushed post 16 drives and makes action, and unblank or during blocking not reaching fully, limiting plate 18 in the key clamp 7 is in vertical relatively state, thereby can make the up and down space of the limiting plate 18 bottoms restrictions key 8 in the key clamp 7, effectively avoided do not unblank fully or during locking the key bit 29 in the key 8 break away from locking bolt 4 bottom surfaces; When unblank fully or locking after because the promotion post 16 on the locking bolt 4 is positioned at an end of arc chute 22, thereby make the limiting plate 18 in the key clamp 7 return to the state that is tilted to the right, promptly key 8 safety can be extracted; Described promotion post 16 slides into the distance of chute 22 other ends by an end of chute 22 and equates with distance between two pin-and-hole 17 centers, it is spacing by the length of chute 22 to have guaranteed to promote post 16, when making locking bolt 4 be positioned at the position of unblanking fully, movable post 3 can be staggered corresponding with pin-and-hole 17, be that locking bolt 4 is when becoming unlocking condition by blocking, the upper surface of the movable post 3 corresponding locking bolts 4 in first hole 11 of the lock top right-hand member of lock frame 1, movable post 3 in second hole of lock top right-hand member 11 of lock frame 1 is vertical corresponding with first pin-and-hole 17 of locking bolt 4 right-hand members, movable post 3 in the 3rd hole of lock top right-hand member 11 of lock frame 1 is vertical corresponding with second pin-and-hole 17 of locking bolt 4 right-hand members, with this order, after staggered correspondence, first pin-and-hole 17 of locking bolt 4 left ends does not have movable post 3 correspondences; The bottom of described limiting plate 18 is lower than the bottom of steady pin 6 and outstanding post 52, guaranteed that key 8 can insert between the bottom of the bottom face of steady pin 6 and outstanding post 52 and limiting plate 18, thereby can not make the groove 37 on the key bit 29 can't accurately correspondingly give prominence to post 52 and steady pin 6 because of the bottom of touching limiting plate 18; Two positioning strips 20 that are fixedly connected with of spacing are arranged away from the side medium position in tongue hole 13 at described limiting plate 18 bottoms; The top end face of described positioning strip 20 all is not higher than the bottom surface of locking bolt 4, the bottom face of positioning strip 20 all is not less than the bottom surface of lock frame 1, guaranteed when locking bolt 4 action and when driving key clamp 7, key clamp 7 can be made the action that tilts between the bottom surface of locking bolt 4 and the bottom surface of locking frame 1; Positioning strip 20 is positioned at part under limiting plate 18 bottom surfaces, and to be 30～60 degree angle lappings to the outside separately respectively oblique, and the widest part between two positioning strip 20 sloping portions is not wider than the width between the limiting plate 18 both sides wooden partitions; The positioning strip 20 of sloping portion is fixedly connected with a right-angled trapezium plate 21 respectively near the side in tongue hole 13; Limit between two right angles of described two blocks of right-angled trapezium plates 21 is all towards the inboard, and the distance between two right-angled trapezium plate 21 opposed inside faces is less than the distance between two positioning strip 20 medial surfaces;

Described key 8 comprises body 24, the shank of the key 25, push-pull handle 26, power transmission shaft 27, position-limiting tube 28 and key bit 29; Described body 24 is for being provided with " L " shape pipe of bending arc 30 between the two ends, the diameter of body 24 is less than the spacing between the medial surface of the spacing between the medial surface of lock frame 1 former and later two sidewalls and two positioning strip 20 vertical parts, and greater than the spacing between two right-angled trapezium plate 21 medial surfaces, thereby guaranteed that key 8 terminations put in place and when touching the plate face of right-angled trapezium plate 21 by inserting between the lock frame 1 front and back side walls, can not misplace by the termination that positioning strip 20 limits key 8 because of sideslip; One end of body 24 is fixedly connected with hinge 31; The catch 32 of fixedly connected first annular in an end outer wall place that hinge 31 is connected with body 24, the catch 32 of fixedly connected second annular of other end termination outer wall of hinge 31, on 31 outer walls of the hinge between two catch 32, be hinged with the shank of the key 25, be that the shank of the key 25 is being when rotate in the axle center with hinge 31, two catch can stop that the shank of the key can not move up and down; Described hinge 31 is provided with axis hole along axial line, and promptly power transmission shaft 27 can be by stretching out in the internal diameter of axis hole by body 24 that runs through hinge 31 that coincide; The other end of described body 24 is made as blind end, and being positioned at bending arc 30 has position-limiting tube 28 in the inside of body 24 near the fixed-site of body 24 blind ends; The internal diameter of described position-limiting tube 28 external diameters and body 24 coincide, and it is uncovered 33 that the tube wall that body 24 is positioned at position-limiting tube 28 upper side open wide to form, and forms two opening edges of uncovered 33 and weld the internal diameter that position-limiting tube 28 is fixed to body 24 with the upper side of position-limiting tube 28 by being arranged in body 24 upper side; Body 24 blind end end faces open wide to the tube wall upper side of uncovered 33 positions and form tube seat 34, and two trough rims that are positioned at tube seat 34 upper side all are not higher than two opening edges of uncovered 33 upper side; Be respectively equipped with projection 35 in two trough rim upper side of tube seat 34 near the position of position-limiting tube 28, described projection 35 is for being symmetrical arranged, and the opening edge upper side level of the upper side of projection 35 and uncovered 33; The recess 46 that forms between on described projection 35 and the body uncovered 33 is corresponding with projection 14 bottom surfaces of lock frame 1 left side, and promptly projection 14 can coincide and snap in the recess 46 of correspondence; Be placed with the supporting key bit 29 of bottom surface and body 24 inwalls in the tube seat 34, promptly the bottom surface of key bit 29 is for kissing the arcwall face of joining with body 24 inwalls;

One end end face center of described key bit 29 corresponding position-limiting tubes 28 is provided with outwards outstanding out screw rod 50, when out screw rod 50 1 ends of key bit 29 attach position-limiting tube 28, length between length between the other end of key bit 29 and body 24 blind ends and two pin-and-hole 17 centers is consistent, thereby driving locking bolt 4 when making key bit 29 by push-and-pull makes accurate in locating and moves, guaranteed locking bolt 4 after action finishes fully, movable post 3 is can be accurately vertical corresponding with corresponding pin-and-hole 17; The width of key bit 29 is corresponding with the width of tube seat 34 upper side notches, and promptly key bit 29 can vertically be placed into by the upper side notch of tube seat 34 in the tube seat 34; The position of corresponding outstanding post 52 of key bit 29 upper side and steady pin 6 is respectively equipped with groove 37, so that open lockset after the corresponding clamping; Simultaneously, because the top and the bottom of outstanding post 52 and steady pin 6 are made as supporting isometrical or waney shape, and outstanding post 52 and steady pin 6 horizontal section of top and the bottom separately can be made as supporting polygonal respectively, circular, have pit or have protruding shape, though outstanding post 52 and steady pin 6 two parts up and down separately had any different but do not influence whole use, therefore the groove 37 on the key bit 29 is also corresponding possesses changeable characteristic, can be as required thereby reached, set a key and open the purpose that a manhole antitheft lock or key are opened a plurality of manhole antitheft locks, can carry out multiple variation owing to giving prominence to post 52 and steady pin 6 simultaneously, and then also improve antitheft effect; The position of the corresponding key bit of the trough rim of tube seat 34 upper side 29 upper side both sides is fixed with compression bar 36 respectively, the upper side of key bit 29 is horizontal plane and the upper side that is not higher than compression bar 36, compression bar 36 has guaranteed that key bit 29 can not rotate in tube seat 34, and compression bar 36 is just limited key bit 29 by the both sides of key bit 29 upper side, and do not block groove 37 on the key bit 29, therefore do not influence the use of key bit 29;

Described power transmission shaft 27 comprises flexible axle mandrel 38 and straight-bar 39; One end of described flexible axle mandrel 38 in tube seat 34 with an end crimping of tube connector 49, the other end of tube connector 49 be provided with the internal thread hole and with 50 supporting connections of out screw rod of key bit 29; The diameter of tube connector 49 has guaranteed that position-limiting tube 28 can limit the zone of action of tube connector 49, thereby key bit 29 has been carried out fixed limit greater than the internal diameter of position-limiting tube 28; The other end of flexible axle mandrel 38 passes position-limiting tube 28 in the internal diameter of body 24 pore is fixedlyed connected with an end of straight-bar 39 with bending arc 30 backs; The other end of straight-bar 39 is hinged with push-pull handle 26 behind the axis hole that passes hinge 31, promptly push-pull handle 26 can be that rotate in the axle center along hinged straight-bar 39 terminations;

Be provided with the plastics pillar between the outer wall of described bending arc inwall and flexible axle mandrel, and plastics pillar 47 is attached on the inwall at body bending arc place, play protection power transmission shaft 27 when the push-and-pull transmission not with body 24 inwall generation direct friction, thereby prolonged application life of power transmission shaft 27; The tube wall of plastics pillar 48 is thicker than the corresponding position-limiting tube 28 and the tube wall of stationary pipes 48, be convenient to fix by an end of 28 pairs of plastics pillars 47 of position-limiting tube, fixed by an end of stationary pipes 48 other end to plastics pillar 47 simultaneously, promptly plastics pillar 47 fixedly is attached at bending arc 30 inwalls between position-limiting tube 28 and the stationary pipes 48; Described stationary pipes 48 is between body 24 inwalls and straight-bar 39 outer walls; The other end of stationary pipes 48 is spacing fixing by hinge 31, and promptly hinge 31 defines the position of stationary pipes 48, and stationary pipes 48 can not be moved, thus the also related position that defines plastics pillar 48;

In addition, in described lock frame 1 front and back side and bottom surface protective cover 40 can be installed, the position of corresponding engaging lug 9 bottom surfaces in the opening two ends that protective cover 40 makes progress is respectively equipped with outwards outstanding fillet 41, the corresponding vertically position in hole 10 is provided with connecting hole 42 on the fillet 41, is convenient to by connecting hole 42 and vertical hole 10 protective cover 40 and lock frame 1 and cover plate 51 are fixedly installed to corresponding rainwater double-edged fine-toothed comb bottom surface simultaneously with bolt; The position of bottom surfaces respective pin hole 17 bottom surfaces of protective cover 40 is provided with downward depression 43, and 43 the bottom surface of caving in is respectively equipped with removable pin 5 and is staggered mudhole 44, is beneficial to drainage and may enters sewage dirt in the lock frame 1.

Described manhole antitheft lock in order to strengthen anti-corrosion function, is coated with anti-corrosion material on the surface of lock frame 1; The tight socket corrosion-resistant pipe of inwall in spaced a plurality of holes 11, lock top, the two ends mouth of pipe of corrosion-resistant pipe is joined with the two ends orifice shapes kiss in corresponding hole 11; Corrosion-resistant pipe in the tight socket correspondence of lockhole 12 inwalls, the edge of the corrosion-resistant pipe two ends mouth of pipe in the lockhole 12 is respectively equipped with the fixedly tooth of protrusion, with these fixedly tooth respectively after outside bending separately, corrosion-resistant pipe closely is fixed in the corresponding lockhole 12, plays locking bolt 4 does not influence corrosion-resistant pipe fastness in the lockhole 12 when action effect; At the same closely corrosion-resistant pipe of socket correspondence of tongue hole 13 inwalls, the mouth of pipe edge at the corrosion-resistant pipe two ends in the tongue hole 13 is respectively equipped with the fixedly tooth of protrusion, with these fixedly tooth respectively after outside bending separately, corrosion-resistant pipe in the tongue hole 13 is closely fixed, and promptly locking bolt 4 does not influence the fastness of corrosion-resistant pipe in the tongue hole 13 when action; At the corrosion-resistant pipe of the tight socket correspondence of inwall of pin-and-hole 17, the two ends mouth of pipe of corrosion-resistant pipe is joined with the two ends orifice shapes kiss of corresponding pin-and-hole 17.

Implement manhole antitheft lock of the present invention, when described theftproof lock is used for well lid, will lock the end position that frame 1 is fixed on the well lid back side earlier, and guarantee closely to be stuck in after locking bolt 4 is stretched out by tongue hole 13 the well seat bearing surface bottom surface of fixed in position; After installing key clamp 7, locking bolt 4 is run through peace by lock frame 1 left side goes in lockhole 12 and the tongue hole 13, and the pin-and-hole on the locking bolt 4 17 and the hole 11 of lock on the frame 1 vertical one by one corresponding after, pack into successively removable pin 5, movable post 3 and spring 2, to promote post 16 again and be mounted on the locking bolt 4, will lock frame 1 by the upright opening 10 on lock frame 1 engaging lug 9 at last and cover plate 51 is fixed to the well lid back side; This moment is because the springs 2 in the hole 11 apply downward active force, and therefore the bottom of movable post 3 is depressed into to enter in the pin-and-hole 17 corresponding on the locking bolt 4 locking bolt 4 can not be moved, and simultaneously, the outstanding post 52 of removable pin 5 lower surfaces is depressed into the outside, bottom surface of locking bolt 4; Then that the other end at the well lid back side is hinged or be connected to corresponding well seat and put, and the position of corresponding lock frame 1 left side lockhole 12 has and is convenient to the through hole that key 8 penetrates on the well lid; When unblanking, earlier push-pull handle 26 is pushed into downwards near the shank of the key 25, make the inner face of key bit 29 tight attached body 24 blind ends, then push-pull handle 26 and the shank of the key 25 are rotated to simultaneously do not influence the through hole that the tube seat of key 8 end inserts well lid after, in the through hole that the tube seat 34 end fill-in wells of key 8 are covered, again tube seat 34 ends of key 8 are pushed into and are lower than lock frame 1 bottom surfaces, groove 37 upper side that afterwards key 8 are adjusted in the tube seat 34 are corresponding with pin-and-hole 17 bottom surfaces on the locking bolt 4, the blind end end face by tube seat 34 tightly touched right-angled trapezium plate 21 and accurately located with positioning strip 20 this moment, played the effect that the groove 37 that makes on the key bit 29 and corresponding outstanding post 52 and steady pin 6 can not misplace; The upwards flat then key 8 of carrying, make in outstanding post 52 and the steady pin 6 corresponding grooves 37 that insert on the key bit 29, simultaneously, the corresponding engaging of projection 14 bottom surfaces of recess on the tube seat 34 46 and lock frame 1 left side, guaranteed unblank or during locking the body 24 of key 8 move left and right can not take place; At this moment, groove 37 is by the upwards action of the moving removable pin 5 of outstanding post 52 holders, and to hole 11, because the active force of hole 11 inner springs 2, the upper side of removable pin 5 is concordant with the upper side of locking bolt 4 with movable post 3 tops; Upwards take out push-pull handle 26, when key bit 29 is pulled to tight attached position-limiting tube 28, locking bolt 4 is also driven, and the end that this moment, locking bolt 4 stretched out tongue hole 13 is drawn out of under the bottom surface of walling crib supporting station, the pin-and-hole 17 on this moment locking bolt 4 with lock frame 1 on hole 11 corresponding being staggered; Because the spring 2 in the hole 11 imposes on movable post 3 active forces, therefore the lower end of movable post 3 is depressed into the vertical corresponding pin-and-holes 17 in locking bolt 4 staggered backs in, movable post 3 in last hole 11 on lock frame 1 the right then is depressed into the upper side of locking bolt 4, thereby locking bolt 4 can't be moved; Make the groove 37 on the key bit 29 break away from steady pin 6 and outstanding post 52 key 8 downward horizontal slidings this moment, extracts key 8 then and promptly finished the operation of opening manhole antitheft lock; The said process reverse operating just can be locked manhole antitheft lock; Wherein behind the locking manhole antitheft lock, spring 2 in the hole 11 imposes on movable post 3 active forces, the lower end of movable post 3 is depressed in the pin-and-hole 17 of vertical correspondence, thereby the two ends that make movable post 3 are stuck among hole 11 and the pin-and-hole 17, reach locking bolt 4 irremovable purposes, promptly locked manhole antitheft lock.

When described manhole antitheft lock is used for the rainwater double-edged fine-toothed comb,, again theftproof lock, cover plate 51 and protective cover 40 are fixedly attached to the mounting plate bottom surface simultaneously at the corresponding mounting plate of lock top upper side of rainwater double-edged fine-toothed comb upper top fixed installation with lock frame 1; Unblanking or during locking, only need and to stretch in the well in the neutral of key 8 by the rainwater double-edged fine-toothed comb, and insert lock frame 1 by depression 43 1 ends of protective cover 40 corresponding lockholes 12 positions, make again in outstanding post 52 and the steady pin 6 corresponding grooves 37 that insert on the key bits 29, the corresponding method of operating that adopts well lid of all the other operations has promptly been finished the operation of unblanking with locking.

Not having specifically described part in the present invention's explanation is prior art, so carefully do not state.

Manhole antitheft lock of the present invention is not only simple in structure, easy for installation, easy operating and cost of production are low, and has effectively improved antitheft, antirust dead effect; In addition, described manhole antitheft lock and corresponding well lid are produced after supporting simultaneously, perhaps produce described manhole antitheft lock separately according to existing corresponding well lid, then manhole antitheft lock and the supporting installation of well lid back are used, be convenient to departments such as electric power, communication, water supply, draining, combustion gas and heating power and be applied on the related facility of settling in public place.

Claims (10)

1. manhole antitheft lock is characterized in that: described manhole antitheft lock comprises lock frame (1), spring (2), movable post (3), locking bolt (4), removable pin (5), steady pin (6), key clamp (7) and key (8); Described lock frame (1) constitutes hollow structure by the lock top and the lock top/bottom part front and back side walls on top; Side walls all is made as " U " word shape of hollow before and after the lock frame (1), is respectively equipped with outwards outstanding engaging lug (9) in the two sides, front and back on lock top, is equipped with vertical hole (10) on two engaging lugs (9); Laterally and at interval be arranged with a plurality of holes (11) uniformly at middle part, lock top, the aperture, two ends up and down of each hole (11) all is the toroidal of outside bending; Described each hole (11) internal upper part all is mounted with spring (2), and spring (2) bottom in each hole (11) all is mounted with movable post (3); The basal surface position that is positioned at the lock top in lock frame (1) left side is provided with lockhole (12), and the width of lockhole (12) is wider than the width between former and later two inside sidewalls faces of lock frame (1); Be provided with the tongue hole (13) corresponding in lock frame (1) right side with lockhole (12), the width in tongue hole (13) is wider than the width between the medial surface of locking former and later two sidewalls of frame (1), and the medial surface that perhaps will be positioned at former and later two sidewalls of lock frame (1) of below, tongue hole (13) is interconnected to form the bottom surface of tongue hole (13); The position of the corresponding lockhole (12) of the medial surface of sidewall bottom surface is respectively equipped with outstanding projection (14) before and after the lock frame (1); Be fixed with fixed head (23) respectively in the lock top bottom surfaces of lock frame (1) and the angle position of tongue hole (13) inner front and back side, the medial surface that lock frame (1) front and back side walls correspondence is positioned at fixed head (23) below is interconnected to constitute limited block (15); The lock top upper side of described lock frame (1) is equipped with and locks the supporting cover plate of top upper side (51);

Described locking bolt (4) is positioned at the below, bottom surface, lock top of lock frame (1), and an end of locking bolt (4) coincide and runs through lockhole (12), and the other end of locking bolt (4) coincide and runs through tongue hole (13); The side of both sides is respectively equipped with an outstanding promotion post (16) near the position of tongue hole (13) before and after the locking bolt (4), and two promotion posts (16) are in the horizontal level of alignment; The position in corresponding each hole of locking bolt (4) (11) is equipped with pin-and-hole (17), and the aperture, two ends up and down of pin-and-hole (17) all is the toroidal of outside bending; Described locking bolt (4) intimate is socketed with supporting corrosion-resistant pipe or the tight more supporting corrosion-resistant pipe of socket after anti-corrosion material is smeared on locking bolt (4) surface; The aperture of corresponding each pin-and-hole of corrosion-resistant pipe (17) upper end is equipped with the port identical with this aperture bore, and the aperture of corrosion-resistant pipe respective pin hole (17) lower end is equipped with the port less than this aperture bore; Be mounted with removable pin (5) in the pin-and-hole (17), the center, lower surface of removable pin (5) is provided with outstanding post (52); Described outstanding post (52) can coincide and stretch out the port that locking bolt (4) is gone up corrosion-resistant pipe respective pin hole (17) aperture, lower end; The position that corrosion-resistant pipe bottom surface on the locking bolt (4) is positioned between two pin-and-holes (17) is equipped with steady pin (6), and steady pin (6) is no longer than the length of outstanding post (52);

Described key clamp (7) comprises limiting plate (18), two junction plates (19), two location-plates (20) and two blocks of right-angled trapezium plates (21) of a spill; The limiting plate of described spill (18) openend upwards and both sides, front and back wooden partition respectively correspondence be positioned at the front and back sides of locking bolt (4), before and after the limiting plate (18) fixedly connected with junction plate (19) bottom faces of a setting respectively in the top of both sides wooden partition; Described two junction plates (19) middle parts is respectively equipped with clamping and promotes the arc chute (22) that post (16) slides, and chute (22) two ends when static are in level; Described promotion post (16) slides into the distance of chute (22) other end by an end of chute (22) and equates with distance between two pin-and-holes (17) center; Two junction plates (19) are hinged on respectively on the corresponding fixed head (23) near an end top of tongue hole (13); Described limiting plate (18) bottom is lower than the bottom of outstanding post (52) and steady pin (6), and is provided with two location-plates (20) in the bottom of limiting plate (18) away from what the side medium position of tongue hole (13) had a spacing; The top end face of described location-plate (20) all is not higher than the bottom surface of locking bolt (4), and the bottom face of location-plate (20) all is not less than the bottom surface of lock frame (1); Location-plate (20) is positioned at part under limiting plate (18) bottom surface, and to be 30～60 degree angle lappings to the outside separately respectively oblique, and two location-plates (20) the widest part between tilting partly is not wider than the width between the wooden partition of limiting plate (18) both sides; The location-plate (20) of the part that tilts is fixedly connected with a right-angled trapezium plate (21) respectively near the side of tongue hole (13); Limit between two right angles of described two blocks of right-angled trapezium plates (21) is all towards the inboard, and the distance between two blocks of right-angled trapezium plates (21) medial surface is less than the distance between two location-plates (20) medial surface simultaneously;

Described key (8) comprises body (24), the shank of the key (25), push-pull handle (26), power transmission shaft (27), position-limiting tube (28) and key bit (29); Described body (24) is for being provided with " L " shape pipe of bending arc (30) between the two ends; Described body (24) diameter is less than the vertical spacing between partly the medial surface of the spacing between the medial surface of lock frame (1) former and later two sidewalls and two location-plates (20), and greater than the spacing between two blocks of right-angled trapezium plates (21) medial surface; One end of body (24) is fixedly connected with hinge (31); Described hinge (31) is provided with axis hole along axial line; The catch (32) of fixedly connected first annular in an end outer wall place that hinge (31) is connected with body (24), the catch (32) of fixedly connected second annular of other end termination outer wall of hinge (31) is hinged with the shank of the key (25) on hinge (31) outer wall between two catch (32); The other end of body (24) is made as blind end, and being positioned at bending arc (30) has position-limiting tube (28) in the inside of body (24) near the fixed-site of body (24) blind end; The internal diameter of the external diameter of described position-limiting tube (28) and body (24) coincide, and body (24) is positioned at the unlimited formation of tube wall uncovered (33) of position-limiting tube (28) upper side; Body (24) blind end end face opens wide to the tube wall upper side of uncovered (33) position and forms tube seat (34), and two trough rims of tube seat (34) all are not higher than two opening edges of uncovered (33); Be respectively equipped with the projection (35) of two opening edge levels of upper side and opening (33) near the position of position-limiting tube (28) in the trough rim upper side of tube seat (34); The recess (46) that forms between described projection (35) and uncovered (33) is corresponding with projection (14) bottom surfaces of locking frame (1) left side; Be placed with supporting key bit (29) in the tube seat (34); The position of the corresponding key bit (29) of the trough rim of tube seat (34) upper side upper side both sides is fixed with compression bar (36) respectively;

Described key bit (29) upper side is horizontal plane and the upper side that is not higher than compression bar (36); One end end face center of the corresponding position-limiting tube of key bit (29) (28) is provided with outwards outstanding out screw rod (50), the width of key bit (29) is corresponding with the width of tube seat (34) upper side notch, and key bit (29) upper side is respectively equipped with the groove (37) of corresponding outstanding post (52) and steady pin (6); When out screw rod (50) one ends of key bit (29) attach position-limiting tubes (28), between the distance between the other end of key bit (29) and body (24) blind end and two pin-and-holes (17) center apart from consistent; Described power transmission shaft (27) comprises flexible axle mandrel (38) and straight-bar (39); One end of described flexible axle mandrel (38) in tube seat (34) with an end crimping of tube connector (49), the other end of tube connector (49) be provided with the internal thread hole and with supporting connection of out screw rod (50) of key bit (29), the diameter of tube connector (49) is greater than the internal diameter of position-limiting tube (28); The pore that the other end of flexible axle mandrel (38) runs through position-limiting tube (28) is fixedlyed connected with an end of straight-bar (39) with bending arc (30) back, and the other end of straight-bar (39) is hinged push-pull handle (26) behind the axis hole that runs through hinge (31); Be provided with plastics pillar (47) between the outer wall of the inwall of described bending arc (30) and flexible axle mandrel (38), and plastics pillar (4) is attached on the inwall of bending arc (30); The limited pipe of one end (28) of plastics pillar (47) stops fixing, and a be fixed end of pipe (48) of the other end of plastics pillar (47) stops fixing; Described stationary pipes (48) is positioned between body (24) inwall and straight-bar (39) outer wall, and the other end of stationary pipes (48) is stopped fixing by hinge (31).

2. manhole antitheft lock according to claim 1, it is characterized in that: side and bottom surface are equipped with protective cover (40) before and after the described lock frame (1), the position of corresponding engaging lug (9) bottom surfaces in the opening two ends that protective cover (40) makes progress is respectively equipped with outwards outstanding fillet (41), and fillet (41) is gone up the corresponding vertically position in hole (10) and is provided with connecting hole (42); The bottom surfaces position of the bottom surfaces respective pin hole (17) of protective cover (40) is provided with downward depression (43), and the bottom surface of depression (43) is respectively equipped with and removable pin (5) is staggered mudhole (44).

3. according to claim 1 or 2 arbitrary described manhole antitheft locks, it is characterized in that: described lock frame (1) surface is coated with anti-corrosion material.

4. manhole antitheft lock according to claim 1, it is characterized in that: the inwall in described each hole (11) that is provided with on the lock top of lock frame (1) all closely is socketed with corresponding corrosion-resistant pipe, and the two ends mouth of pipe of corrosion-resistant pipe is kissed with the two ends orifice shapes in corresponding hole (11) and joined.

5. manhole antitheft lock according to claim 1 is characterized in that: described locking bolt (4) is made as integrative-structure with the corrosion-resistant pipe and the steady pin (6) of locking bolt (4) intimate socket.

6. manhole antitheft lock according to claim 1 is characterized in that: described each pin-and-hole (17) inwall all closely is socketed with corresponding corrosion-resistant pipe, and the two ends orifice shapes kiss of the two ends mouth of pipe of corrosion-resistant pipe and pin-and-hole (17) is joined.

7. manhole antitheft lock according to claim 1, it is characterized in that: described lockhole (12) inwall closely is socketed with corresponding corrosion-resistant pipe, and the edge of the corrosion-resistant pipe two ends mouth of pipe can be with the tight attached fixedly tooth that is fixed in the lockhole (12) of corrosion-resistant pipe after being protruding with bending respectively.

8. manhole antitheft lock according to claim 1, it is characterized in that: described tongue hole (13) inwall closely is socketed with corresponding corrosion-resistant pipe, and the edge of the corrosion-resistant pipe two ends mouth of pipe can be with the tight attached fixedly tooth that is fixed in the tongue hole (13) of corrosion-resistant pipe after being protruding with bending respectively.

9. manhole antitheft lock according to claim 1, it is characterized in that: described outstanding post (52) and steady pin (6) two parts up and down separately are made as supporting isometrical or waney shape, and outstanding post (52) and steady pin (6) separately up and down two-part horizontal section can be made as supporting polygonal, circle respectively, have pit or have the shape of projection.

10. manhole antitheft lock according to claim 1 is characterized in that: the termination that described locking bolt (4) stretches out lock frame (1) right side by tongue hole (13) is connected with the height regulating rod (45) of regulating gap between locking bolt (4) and the corresponding well seat bearing surface bottom surface.

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