CN215759182U - Manhole cover plate and protective fence linkage device - Google Patents

Abstract

A linkage device for a manhole cover plate and a protective fence comprises slide rails, a linkage mechanism, protective guards, a locking mechanism and protective covers, wherein the slide bars of the linkage mechanism are positioned in cavities of the slide rails and are in sliding fit, the slide rails are annularly arranged, the protective guards and the upper ends of the slide bars are connected to form a cylindrical grid, channels are arranged in the axial direction of the cylindrical grid, the cylindrical grid slides upwards along the slide rails to form protection, the protective covers are connected with articulated arms of the linkage mechanism, the protective covers are closed or opened when the articulated arms act, and the locking mechanism locks the cylindrical grid. The manhole cover overcomes the problems that the original manhole is protected by displacement caused by impact, and the manhole is sealed by the operation cover plate, and has the characteristics of simple structure, safety, reliability, and simplicity and convenience in operation, and the manhole cover can be quickly protected by linkage, the manhole is not required to be sealed by additionally operating the cover plate, and the displacement caused by impact is avoided.

Description

Manhole cover plate and protective fence linkage device

Technical Field

The utility model belongs to the technical field of safety protection, and relates to a manhole cover plate and protective fence linkage device.

Background

The manhole is the passageway access & exit in making things convenient for the operation personnel to pass in and out large-scale confined space, the ubiquitous is in each trade, the purpose of setting up the manhole is that the operation personnel of being convenient for pass in and out installs, maintain, inspection or specific operation etc. to inside, for example, large-scale hydroelectric set foundation ditch, the manhole position all installs the orifice cover plate, when the operation personnel need pass through from top to bottom through this orifice, then need open this orifice cover plate, at present, this type of apron generally lays for the mode of hinge joint mode or direct covering, the apron of these two kinds of mounting means all has certain danger to operating personnel when opening. Because the cover plates in the two modes are opened, an operator needs to stand at the edge part of the hole opening to open the cover, and the risk of falling is caused; the temporary isolation fence ground does not have a fixed mounting point, the temporary isolation fence cannot be effectively fixed at an orifice position, the isolation fence is easy to move when being impacted by external force, and the temporary isolation fence cannot effectively play a role in safety isolation.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a manhole cover plate and protective fence linkage device which is simple in structure, a slide bar of a linkage mechanism is positioned in a cavity of a slide rail and is in sliding fit, a plurality of slide rails are annularly arranged, a plurality of protective guards are connected with the upper ends of the slide bars to form a cylindrical grid, a channel is arranged in the axial direction of the cylindrical grid, the cylindrical grid slides upwards along the slide rail to form protection, the protective covers are connected with a hinged arm of the linkage mechanism, the protective covers are closed or opened when the hinged arm acts, the cylindrical grid is locked by a locking mechanism, the linkage is used for quickly forming protection for a manhole, the manhole is not required to be sealed by additionally operating a cover plate, the displacement caused by collision is avoided, and the manhole cover plate and protective fence linkage device is safe, reliable and simple and convenient to operate.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: a linkage device of a manhole cover plate and a protective fence comprises a slideway, a linkage mechanism, a protective fence, a locking mechanism and a protective cover; the slide bars of the linkage mechanism are positioned in cavities of the slide ways and are in sliding fit, the slide ways are annularly arranged, the plurality of protective guards are connected with the upper ends of the slide bars to form a cylindrical grid, and channels are arranged in the axial direction of the cylindrical grid; the cylindrical grid slides upwards along the slideway to form protection; the locking mechanism is positioned outside the cylindrical grid, and the locking pin is matched with the sliding seat of the linkage mechanism; the protective cover is connected with an articulated arm of the linkage mechanism, and the protective cover is closed or opened when the articulated arm acts.

The slide is the rectangular pipe that sets up the notch, and the rectangular pipe both sides set up spacing groove and anchor union piece, and the notch side sets up the articulated arm one end connection of ear seat and link gear.

The linkage mechanism comprises a joint connected with the upper end of the sliding rod, the sliding seat is in sliding fit with the upper end of the sliding rod, and one end of the hinged arm is hinged with the sliding seat.

Locking holes are formed in the lower end of the sliding rod, the joint and the sliding seat, and rolling wheels are arranged on two sides of the lower end of the sliding rod and two sides of the joint; the sinking groove hole of the sliding seat is matched with the joint, and the joint and the locking hole on the sliding seat correspond to each other; an embedded groove is also arranged at the upper end of the sliding seat.

The guard rail comprises a plurality of vertical rods which are vertically and crossly connected with limit rods, and two ends of each vertical rod are connected with the cross rods; the upper part of the limiting rod is provided with a skirting board connected with the vertical rod; the limiting rod, the cross rod and the skirting board are all arc-shaped structures; the horizontal pole and the articulate of rail guard upper end, gag lever post and spacing groove sliding fit.

The locking mechanism comprises a locking pin in sliding fit with the fixed pipe, the operating handle penetrates through a guide groove in the fixed pipe to be connected with the locking pin, a communicated locking groove is formed in one side of the guide groove, the spring is positioned in the fixed pipe and sleeved on the locking pin, and two ends of the spring are respectively abutted against a check ring on the locking pin and a step on the inner wall of the fixed pipe; the operating handle pushes the locking pin to extend out of the fixed pipe to be matched and locked with the locking hole.

The protective cover is a grid fan-shaped structure, the protective cover is connected with an upper support arm of the articulated arm, the upper support arm is connected with the sliding seat, and the arc-shaped end of the protective cover faces the sliding seat.

And supports are arranged on one sides of the cross rods and the limiting rods at the upper ends of the two guard railings on the two sides of the channel.

The protective covers on two sides of the channel are of a split structure matched with a half halving pin shaft, wherein one half of the protective covers is connected with the upper arm of the articulated arm, and the other half of the protective covers is lapped with the upper arm of the articulated arm; a plurality of steps are arranged in the channel.

A linkage device of a manhole cover plate and a protective fence comprises a slideway, a linkage mechanism, a protective fence, a locking mechanism and a protective cover; the slide bars of the linkage mechanism are positioned in the cavities of the slide ways and are in sliding fit, the slide ways are annularly arranged, the plurality of protective guards are connected with the upper ends of the slide bars to form a cylindrical grid, and channels are arranged in the axial direction of the cylindrical grid; the cylindrical grid slides upwards along the slideway to form protection; the locking mechanism is positioned outside the cylindrical grid, and the locking pin is matched with the sliding seat of the linkage mechanism; the protective cover is connected with an articulated arm of the linkage mechanism, and the protective cover is closed or opened when the articulated arm acts. Simple structure, slide bar through link gear is located the cavity sliding fit of slide, a plurality of slides are the annular and lay, a plurality of rail guards are connected with the slide bar upper end and are constituteed the cylinder grid, cylinder grid axial direction sets up the passageway, the cylinder grid forms the protection along the slide upwards sliding, the protective cover is connected with link gear's articulated arm, the protective cover is closed or is opened when the articulated arm moves, locking mechanical system locks the cylinder grid, the linkage forms the protection to the manhole fast, need not to operate separately and cover the hole and seal the manhole, avoid the striking to take place the displacement, safety and reliability, easy operation is convenient.

In the preferred scheme, the slide way is a rectangular pipe provided with a notch, two sides of the rectangular pipe are provided with a limiting groove and an anchoring piece, and the side of the notch is provided with an ear seat connected with one end of a hinged arm of the linkage mechanism. The structure is simple, when the manhole cover is installed, the anchoring pieces on two sides of the slide way are fixedly connected with the inner wall of the manhole, and the upper end of the slide way is positioned below the base surface of the manhole.

In a preferred scheme, the linkage mechanism comprises a joint connected with the upper end of a sliding rod, a sliding seat is in sliding fit with the upper end of the sliding rod, and one end of a hinged arm is hinged with the sliding seat. The structure is simple, when the device is used, after the protective covers are completely unfolded to seal the upper end of the cylindrical grid, the joint slides into the counter sink of the sliding seat, and the upper side surfaces of the joint and the sliding seat and the manhole base surface are located on the same horizontal plane.

In the preferred scheme, locking holes are formed in the lower end of the sliding rod, the joint and the sliding seat, and rollers are arranged on two sides of the lower end of the sliding rod and two sides of the joint; the sinking groove hole of the sliding seat is matched with the joint, and the joint and the locking hole on the sliding seat correspond to each other; an embedded groove is also arranged at the upper end of the sliding seat. The structure is simple, and when the slide bar is used, the roller is in rolling contact with the slide way in the process that the slide bar slides along the slide way; when the joint slides into the sunk groove hole of the sliding seat, the cross rod at the upper end of the protective guard is embedded into the embedded groove at the upper end of the sliding seat, at the moment, the joint and the locking hole on the sliding seat are overlapped, and the locking pin of the locking mechanism penetrates through the locking hole to be matched and locked with the locking hole.

In a preferred scheme, the guard rail comprises a plurality of vertical rods which are vertically and crossly connected with limit rods, and two ends of each vertical rod are connected with a cross rod; the upper part of the limiting rod is provided with a skirting board connected with the vertical rod; the limiting rod, the cross rod and the skirting board are all arc-shaped structures; the horizontal pole and the articulate of rail guard upper end, gag lever post and spacing groove sliding fit. The structure is simple, when the device is installed, the plurality of protective guards are connected with the plurality of linkage mechanisms to form the cylindrical grid, the manhole is protected by the cylindrical grid, the skirting board increases the structural strength of the cylindrical grid, and meanwhile, the protective effect on the lower end of the cylindrical grid is achieved, and the deformation caused by gravity impact is avoided; the cross rod at the upper end of the vertical rod is connected with the joint, the limiting rod penetrates through the limiting groove to be in sliding fit with the limiting groove, when the sliding rod moves up and down, the protective guard moves up and down along with the sliding rod, the limiting rod slides up and down along the limiting groove, and the limiting rod limits the upward stroke of the cylindrical grid.

In a preferred scheme, the locking mechanism comprises a locking pin in sliding fit with the fixed pipe, the operating handle penetrates through a guide groove in the fixed pipe to be connected with the locking pin, a communicated locking groove is formed in one side of the guide groove, the spring is positioned in the fixed pipe and sleeved on the locking pin, and two ends of the spring are respectively abutted against a check ring on the locking pin and a step on the inner wall of the fixed pipe; the operating handle pushes the locking pin to extend out of the fixed pipe to be matched and locked with the locking hole. When the locking device is used, the operating handle is pushed to drive the locking pin to slide along the guide groove, the spring is compressed, the operating handle rotates towards one side to enter the locking groove after the locking pin extends out of the fixed pipe, the locking pin is limited to reset, and otherwise, the locking pin resets; the locking pin locks the cylindrical grid when extending out of the fixed pipe, and unlocks the cylindrical grid when being reset and retreated into the fixed pipe.

In a preferred scheme, the protective cover is of a grid fan-shaped structure, the protective cover is connected with an upper support arm of the hinged arm, the upper support arm is connected with the sliding seat, and the arc-shaped end of the protective cover faces the sliding seat. The structure is simple, when the device is installed, the protective cover of the fan-shaped structure is fixedly connected with the upper support arm of the articulated arm, the sliding seat is contacted with the upper end of the sliding way, and the protective cover is in a horizontal state; when the sliding rod is used, after the rod body at the upper end of the sliding rod slides out of the sliding channel, the lower side of the sliding seat is in contact with the rod body at the lower end of the sliding rod, when the sliding rod continuously slides towards the upper end of the sliding channel, the sliding seat is driven to ascend, the angle between the upper support arm and the lower support arm of the articulated arm is increased, and the protective cover is inclined downwards and collapses.

In a preferred scheme, a support is arranged on one side of a cross bar and a limiting rod at the upper ends of two guard rails on two sides of a channel. The structure is simple, when the device is installed, the supports at the upper ends of the two protective fences on the two sides of the channel are connected with the joint, the support connected with the limiting rod is connected with the bolt, and the bolt penetrates through the limiting groove to be in sliding fit with the limiting groove; when the device is used, the two guard railings on the two sides of the channel rotate around the support to be opened and closed, and the guard railings do not interfere with the steps when the device is opened and closed.

In a preferred scheme, the protective covers on two sides of the channel are in a split structure with half of equal split pin shaft matching, wherein one half of the protective covers is connected with the upper arm of the articulated arm, and the other half of the protective covers is lapped with the upper arm of the articulated arm; a plurality of steps are arranged in the channel. The protective covers on the two sides of the channel are of split structures matched with half equal-dividing pin shafts, after the cylindrical grid rises to the upper portion of a manhole, the protective covers on the two sides of the channel are in a downward-inclined collapse state, the protective covers on the side faces of the channel are pushed to enable the half protective covers to rotate around the pin shafts to be folded with the other half protective covers, the protective covers on the two sides of the channel are located on the two sides of a step, an operator can enter and exit the manhole along the step in the channel, and the operator can hold the protective covers on the two sides of the channel to enter and exit in the process of entering and exiting, so that the safety in the process of entering and exiting is improved.

A linkage device for a manhole cover plate and a protective fence comprises slide rails, a linkage mechanism, protective guards, a locking mechanism and protective covers, wherein the slide bars of the linkage mechanism are positioned in cavities of the slide rails and are in sliding fit, the slide rails are annularly arranged, the protective guards and the upper ends of the slide bars are connected to form a cylindrical grid, channels are arranged in the axial direction of the cylindrical grid, the cylindrical grid slides upwards along the slide rails to form protection, the protective covers are connected with articulated arms of the linkage mechanism, the protective covers are closed or opened when the articulated arms act, and the locking mechanism locks the cylindrical grid. The manhole cover overcomes the problems that the original manhole is protected by displacement caused by impact, and the manhole is sealed by the operation cover plate, and has the characteristics of simple structure, safety, reliability, and simplicity and convenience in operation, and the manhole cover can be quickly protected by linkage, the manhole is not required to be sealed by additionally operating the cover plate, and the displacement caused by impact is avoided.

Drawings

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a state view of the manhole being closed by the protective cover.

Fig. 3 is a schematic structural view of the slide of the present invention.

Fig. 4 is a schematic structural diagram of the linkage mechanism of the present invention.

FIG. 5 is a schematic structural diagram of the sliding bar according to the present invention.

Fig. 6 is a schematic structural view of the sliding seat of the present invention.

FIG. 7 is a schematic view of the structure of the channel of the present invention.

Fig. 8 is a schematic structural view of the connection of the guard rail at the side of the passageway with the slide and the link mechanism according to the present invention.

Fig. 9 is a schematic structural view of the guard rail of the present invention.

Fig. 10 is a schematic structural view of a channel side guard rail according to the present invention.

FIG. 11 is a schematic view of the locking mechanism of the present invention.

Fig. 12 is a schematic view of a protective cover according to the present invention.

Fig. 13 is a schematic structural view of a channel side protective cover according to the present invention.

FIG. 14 is a schematic view of the step of the present invention.

In the figure: the slide way 1, the notch 11, the limiting groove 12, the anchoring piece 13, the ear seat 14, the linkage mechanism 2, the slide rod 21, the joint 22, the slide seat 23, the hinge arm 24, the locking hole 25, the roller 26, the guard rail 3, the limiting rod 31, the vertical rod 32, the cross rod 33, the skirting board 34, the locking mechanism 4, the fixed pipe 41, the locking pin 42, the operating handle 43, the guide groove 44, the locking groove 45, the spring 46, the protective cover 5, the channel 6 and the step 7.

Detailed Description

As shown in fig. 1 to 14, a linkage device for a manhole cover plate and a protective fence includes a slideway 1, a linkage mechanism 2, a protective fence 3, a locking mechanism 4 and a protective cover 5; the slide bars 21 of the linkage mechanism 2 are positioned in the cavities of the slide ways 1 and are in sliding fit, the plurality of slide ways 1 are annularly arranged, the plurality of protective fences 3 are connected with the upper ends of the slide bars 21 to form a cylindrical grid, and a channel 6 is arranged in the axial direction of the cylindrical grid; the cylindrical grid slides upwards along the slideway 1 to form protection; the locking mechanism 4 is positioned outside the cylindrical grid, and the locking pin 42 is matched with the sliding seat 23 of the linkage mechanism 2; the protecting cover 5 is connected with a hinge arm 24 of the linkage mechanism 2, and the protecting cover 5 is closed or opened when the hinge arm 24 acts. Simple structure, slide bar 21 through link gear 2 is located slide 1's cavity sliding fit, a plurality of slides 1 are the annular and lay, a plurality of rail guards 3 are connected with slide bar 21 upper end and are constituteed the cylinder grid, cylinder grid axial direction sets up passageway 6, the cylinder grid slides upwards along slide 1 and forms the protection, protective cover 5 is connected with link gear 2's articulated arm 24, protective cover 5 is closed or is opened when articulated arm 24 moves, locking mechanism locks the cylinder grid, the linkage forms the protection to the people hole fast, need not to operate separately and cover the manhole and seal, avoid the striking to take place the displacement, safety and reliability, easy operation is convenient.

In the preferred scheme, the slide way 1 is a rectangular tube provided with a notch 11, two sides of the rectangular tube are provided with a limiting groove 12 and an anchoring piece 13, and the side of the notch 11 is provided with an ear seat 14 connected with one end of a hinge arm 24 of the linkage mechanism 2. The structure is simple, during installation, the anchoring pieces 13 on two sides of the slideway 1 are fixedly connected with the inner wall of the manhole, and the upper end of the slideway 1 is positioned below the manhole base surface.

In a preferred scheme, the linkage mechanism 2 comprises a joint 22 connected with the upper end of a sliding rod 21, a sliding seat 23 is in sliding fit with the upper end of the sliding rod 21, and one end of a hinge arm 24 is hinged with the sliding seat 23. The structure is simple, when in use, after the plurality of protective covers 5 are completely unfolded to seal the upper end of the cylindrical grid, the joint 22 slides into the sinking groove hole of the sliding seat 23, and the upper side surfaces of the joint 22 and the sliding seat 23 and the manhole base surface are positioned on the same horizontal plane.

In a preferable scheme, locking holes 25 are arranged at the lower end of the sliding rod 21, the joint 22 and the sliding seat 23, and rollers 26 are arranged at two sides of the lower end of the sliding rod 21 and two sides of the joint 22; the sinking groove hole of the sliding seat 23 is matched with the joint 22, and the joint 22 corresponds to the locking hole 25 on the sliding seat 23; an embedded groove is also arranged at the upper end of the sliding seat 23. The structure is simple, when in use, the roller 26 is in rolling contact with the slideway 1 when the sliding rod 21 slides along the slideway 1; when the joint 22 slides into the sunk slot of the sliding seat 23, the cross bar 33 at the upper end of the guard rail 3 is embedded into the embedded slot at the upper end of the sliding seat 23, at the moment, the joint 22 and the locking hole 25 on the sliding seat 23 are overlapped, and the locking pin 42 of the locking mechanism 4 penetrates through the locking hole 25 to be matched and locked with the locking hole.

In a preferred scheme, the guard rail 3 comprises a plurality of vertical rods 32 which are vertically and crossly connected with a limiting rod 31, and two ends of each vertical rod 32 are connected with a cross rod 33; the upper part of the limiting rod 31 is provided with a skirting board 34 connected with the vertical rod 32; the limiting rod 31, the cross rod 33 and the skirting board 34 are all arc-shaped structures; the cross bar 33 at the upper end of the guard rail 3 is connected with the joint 22, and the limiting rod 31 is in sliding fit with the limiting groove 12. The structure is simple, when the device is installed, the plurality of guard rails 3 and the plurality of linkage mechanisms 2 are connected to form a cylindrical grid, the manhole is protected by the cylindrical grid, the skirting board 34 increases the structural strength of the cylindrical grid, and meanwhile, the lower end of the cylindrical grid is protected, so that deformation caused by gravity impact is avoided; the cross bar 33 at the upper end of the vertical bar 32 is connected with the joint 22, the limiting bar 31 passes through the limiting groove 12 and is in sliding fit with the limiting groove, when the sliding bar 21 moves up and down, the protective guard 3 moves up and down along with the sliding bar, the limiting bar 31 slides up and down along the limiting groove 12, and the limiting bar 31 limits the upward stroke of the cylindrical grid.

In a preferred scheme, the locking mechanism 4 comprises a locking pin 42 in sliding fit with the fixed pipe 41, the operating handle 43 passes through a guide groove 44 on the fixed pipe 41 to be connected with the locking pin 42, a communicated locking groove 45 is arranged on one side of the guide groove 44, a spring 46 is positioned in the fixed pipe 41 and sleeved on the locking pin 42, and two ends of the spring 46 are respectively abutted against a retaining ring on the locking pin 42 and a step on the inner wall of the fixed pipe 41; the operating handle 43 pushes the locking pin 42 to extend out of the fixing tube 41 to be locked with the locking hole 25. When the locking device is used, the operating handle 43 is pushed to drive the locking pin 42 to slide along the guide groove 44, the spring 46 is compressed, after the locking pin 42 extends out of the fixing tube 41, the operating handle 43 rotates towards one side to enter the locking groove 45, the locking pin 42 is limited to reset, and otherwise, the locking pin 42 resets; the locking pin 42 locks the cylindrical grid when it is extended out of the fixing tube 41, and releases the locking of the cylindrical grid when it is returned and retracted into the fixing tube 41.

In a preferred embodiment, the protecting cover 5 is a grid fan-shaped structure, the protecting cover 5 is connected to an upper arm of the hinge arm 24, the upper arm is connected to the sliding seat 23, and an arc-shaped end of the protecting cover 5 faces the sliding seat 23. The structure is simple, when the device is installed, the protective cover 5 with a fan-shaped structure is fixedly connected with the upper arm of the articulated arm 24, the sliding seat 23 is contacted with the upper end of the slide way 1, and the protective cover 5 is in a horizontal state; when the slide bar 21 slides to the upper end of the slide way 1, the lower side of the slide seat 23 is contacted with the rod body at the lower end of the slide bar 21, the slide bar 21 drives the slide seat 23 to ascend when continuously sliding to the upper end of the slide way 1, the angle between the upper support arm and the lower support arm of the articulated arm 24 is increased, and the protective cover 5 falls along with the downward inclination.

In a preferred scheme, a support is arranged on one side of the cross bar 33 and the limiting rod 31 at the upper ends of the two guard rails 3 at two sides of the channel 6. The structure is simple, when the device is installed, the supports at the upper ends of the two protective fences 3 on the two sides of the channel 6 are connected with the joint 22, the supports connected with the limiting rods 31 are connected with the bolts, and the bolts penetrate through the limiting grooves 12 to be in sliding fit with the limiting grooves; when the device is used, the two guard rails 3 positioned at the two sides of the channel 6 rotate around the support to be opened and closed, and when the device is opened and closed, the guard rails 3 do not interfere with the steps 7.

In a preferred scheme, the protective covers 5 on two sides of the channel 6 are of a split structure matched with a half halving pin shaft, wherein one half of the split structure is connected with the upper arm of the hinge arm 24, and the other half of the split structure is overlapped with the upper arm of the hinge arm 24; a plurality of steps 7 are provided within the channel 6. The structure is simple, when the device is used, the protective covers 5 on two sides of the channel 6 adopt a split structure with half equal-division pin shaft matching, after the cylindrical grid rises to the upper part of the manhole, the protective covers 5 on two sides of the channel 6 are in a downward-inclined collapse state, the protective covers 3 on the side surfaces of the channel 6 are pushed to enable one half of the protective covers 5 to rotate around the pin shaft to be folded with the other half of the protective covers 5, the protective covers 3 on two sides of the channel 6 are located on two sides of the step 7, at the moment, an operator can enter and exit the manhole along the step 7 in the channel 6, and in the process of entering and exiting, the operator can hold the protective covers 3 on two sides of the channel 6 to enter and exit, so that the safety in the process of entering and exiting is improved.

When the manhole cover plate and protection fence linkage device is installed and used, the sliding rods 21 of the linkage mechanism 2 are located in the cavities of the sliding rails 1 and are in sliding fit, the sliding rails 1 are arranged in an annular shape, the protective guards 3 are connected with the upper ends of the sliding rods 21 to form the cylindrical grids, the channels 6 are arranged in the axial direction of the cylindrical grids, the cylindrical grids slide upwards along the sliding rails 1 to form protection, the protective covers 5 are connected with the hinged arms 24 of the linkage mechanism 2, the protective covers 5 are closed or opened when the hinged arms 24 act, the cylindrical grids are locked by the locking mechanism, linkage can quickly form protection for the formation of manhole, the manhole does not need to be sealed by an additional operation cover plate, impact is avoided, and displacement is avoided.

When the manhole cover is installed, the anchoring pieces 13 on the two sides of the slideway 1 are fixedly connected with the inner wall of the manhole, and the upper end of the slideway 1 is positioned below the manhole base surface.

When the device is used, after the plurality of protective covers 5 are completely unfolded to seal the upper end of the cylindrical grid, the joint 22 slides into the sinking groove hole of the sliding seat 23, and the upper side surfaces of the joint 22 and the sliding seat 23 and the manhole base surface are positioned on the same horizontal plane.

When in use, the roller 26 is in rolling contact with the slideway 1 when the slide rod 21 slides along the slideway 1; when the joint 22 slides into the sunk slot of the sliding seat 23, the cross bar 33 at the upper end of the guard rail 3 is embedded into the embedded slot at the upper end of the sliding seat 23, at the moment, the joint 22 and the locking hole 25 on the sliding seat 23 are overlapped, and the locking pin 42 of the locking mechanism 4 penetrates through the locking hole 25 to be matched and locked with the locking hole.

When the device is installed, the plurality of protective fences 3 are connected with the plurality of linkage mechanisms 2 to form a cylindrical grid, the manhole is protected by the cylindrical grid, the skirting board 34 increases the structural strength of the cylindrical grid, and meanwhile, the protective effect on the lower end of the cylindrical grid is achieved, and deformation caused by gravity impact is avoided; the cross bar 33 at the upper end of the vertical bar 32 is connected with the joint 22, the limiting bar 31 passes through the limiting groove 12 and is in sliding fit with the limiting groove, when the sliding bar 21 moves up and down, the protective guard 3 moves up and down along with the sliding bar, the limiting bar 31 slides up and down along the limiting groove 12, and the limiting bar 31 limits the upward stroke of the cylindrical grid.

When the locking device is used, the operating handle 43 is pushed to drive the locking pin 42 to slide along the guide groove 44, the spring 46 is compressed, after the locking pin 42 extends out of the fixing tube 41, the operating handle 43 rotates towards one side to enter the locking groove 45, the locking pin 42 is limited to reset, and otherwise, the locking pin 42 resets; the locking pin 42 locks the cylindrical grid when it is extended out of the fixing tube 41, and releases the locking of the cylindrical grid when it is returned and retracted into the fixing tube 41.

When the device is installed, the protective cover 5 of the fan-shaped structure is fixedly connected with the upper arm of the articulated arm 24, the sliding seat 23 is contacted with the upper end of the slide way 1, and the protective cover 5 is in a horizontal state; when the slide bar 21 slides to the upper end of the slide way 1, the lower side of the slide seat 23 is contacted with the rod body at the lower end of the slide bar 21, the slide bar 21 drives the slide seat 23 to ascend when continuously sliding to the upper end of the slide way 1, the angle between the upper support arm and the lower support arm of the articulated arm 24 is increased, and the protective cover 5 falls along with the downward inclination.

When the device is installed, the supports at the upper ends of the two protective fences 3 on the two sides of the channel 6 are connected with the joint 22, the support connected with the limiting rod 31 is connected with the bolt, and the bolt penetrates through the limiting groove 12 to be in sliding fit with the limiting groove; when the device is used, the two guard rails 3 positioned at the two sides of the channel 6 rotate around the support to be opened and closed, and when the device is opened and closed, the guard rails 3 do not interfere with the steps 7.

When the protective device is used, the protective covers 5 on the two sides of the channel 6 adopt a split structure with half equal-dividing pin shafts matched, after the cylindrical grid rises to the upper part of a manhole, the protective covers 5 on the two sides of the channel 6 are in a downward-inclined collapse state, the protective covers 3 on the side surfaces of the channel 6 are pushed to enable one half of the protective covers 5 to rotate around the pin shafts to be folded with the other half of the protective covers 5, the protective covers 3 on the two sides of the channel 6 are located on the two sides of the step 7, at the moment, an operator can enter and exit the manhole along the step 7 in the channel 6, and in the process of entering and exiting, the operator can hold the protective covers 3 on the two sides of the channel 6 to enter and exit, so that the safety in the process of entering and exiting is improved.

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the utility model.

Claims (8)

1. The utility model provides a manhole mouth apron and protection rail aggregate unit, characterized by: the device comprises a slideway (1), a linkage mechanism (2), a protective guard (3) and a protective cover (5); the slide bars (21) of the linkage mechanism (2) are positioned in the cavities of the slide ways (1) and are in sliding fit, the slide ways (1) are annularly arranged, the plurality of protective railings (3) are connected with the upper ends of the slide bars (21) to form a cylindrical grid, and a channel (6) is arranged in the axial direction of the cylindrical grid; the cylindrical grid slides upwards along the slideway (1) to form protection; the protective cover (5) is connected with a hinged arm (24) of the linkage mechanism (2), and the protective cover (5) is closed or opened when the hinged arm (24) acts.

2. The manhole cover and protective fence linkage as claimed in claim 1, wherein: the slide (1) is a rectangular tube provided with a notch (11), two sides of the rectangular tube are provided with a limiting groove (12) and an anchoring piece (13), and the side of the notch (11) is provided with an ear seat (14) connected with one end of a hinged arm (24) of the linkage mechanism (2).

3. The manhole cover and protective fence linkage as claimed in claim 1, wherein: the linkage mechanism (2) comprises a joint (22) connected with the upper end of a sliding rod (21), a sliding seat (23) is in sliding fit with the upper end of the sliding rod (21), and one end of a hinged arm (24) is hinged with the sliding seat (23).

4. The manhole cover and protective fence linkage of claim 3, wherein: locking holes (25) are formed in the lower end of the sliding rod (21), the joint (22) and the sliding seat (23), and rollers (26) are arranged on two sides of the lower end of the sliding rod (21) and two sides of the joint (22); a sunk slot hole of the sliding seat (23) is matched with the joint (22), and the joint (22) corresponds to the locking hole (25) on the sliding seat (23); an embedded groove is also arranged at the upper end of the sliding seat (23).

5. The manhole cover and protective fence linkage as claimed in claim 1, wherein: the guard rail (3) comprises a plurality of vertical rods (32) which are vertically and crossly connected with a limiting rod (31), and two ends of each vertical rod (32) are connected with a cross rod (33); the upper part of the limiting rod (31) is provided with a skirting board (34) connected with the vertical rod (32); the limiting rod (31), the cross rod (33) and the skirting board (34) are all arc-shaped structures; a cross bar (33) at the upper end of the guard rail (3) is connected with the joint (22), and a limiting rod (31) is in sliding fit with the limiting groove (12).

6. The manhole cover and protective fence linkage as claimed in claim 1, wherein: protective cover (5) are the fan-shaped structure of net, and protective cover (5) are connected with the last support arm of articulated arm (24), go up the support arm and are connected with sliding seat (23), and the arc end of protective cover (5) is towards sliding seat (23).

7. The manhole cover and protective fence linkage as claimed in claim 1, wherein: and a support is arranged on one side of a cross bar (33) and a limiting rod (31) at the upper ends of the two guard rails (3) on the two sides of the channel (6).

8. The manhole cover and protective fence linkage as claimed in claim 1, wherein: the protective covers (5) on two sides of the channel (6) are of a split structure matched with a half halving pin shaft, wherein one half of the protective covers is connected with the upper support arm of the hinged arm (24), and the other half of the protective covers is lapped with the upper support arm of the hinged arm (24); a plurality of steps (7) are arranged in the channel (6).

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