CN210925174U

CN210925174U - City planning overall arrangement display device

Info

Publication number: CN210925174U
Application number: CN201921230714.6U
Authority: CN
Inventors: 巫昊燕
Original assignee: Chongqing Normal University
Current assignee: Chongqing Normal University
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-07-03
Anticipated expiration: 2029-07-31

Abstract

The utility model belongs to the technical field of the sand table facility, a city planning overall arrangement display device is provided, include: the top of the sand table rack is provided with a sand table groove for arranging a sand table, and the middle part of the sand table groove is provided with a containing hole; the upper end of the upright column can penetrate through the accommodating hole and is positioned above the accommodating hole, a first air supply channel and a first air draft channel are arranged on the upright column, the exhaust end of the first air supply channel and the air inlet end of the first air draft channel are transversely arranged at the upper end of the upright column, and the air inlet end of the first air supply channel and the exhaust end of the first air draft channel are longitudinally arranged at the lower end of the upright column; the base is arranged at the lower end of the upright post and is rotationally connected with the upright post; the cleaning pipe comprises a connector, a blowing pipe, a dust absorption pipe and a handle; an air supply device; and a dust collecting apparatus. The utility model discloses simple structure, greatly reduced the cost of clean sand table model.

Description

City planning overall arrangement display device

Technical Field

The utility model relates to a sand table facility technical field, concretely relates to city planning overall arrangement display device.

Background

In a city planning exhibition hall, a planning model of a certain area needs to be displayed through a sand table so as to visually display the planning direction of the city in a plurality of years in the future to people. Generally, the models matched with the sand table generally comprise models of buildings, streets, greens and the like, and the models are small and exquisite, are usually connected with a power supply and are not expensive to manufacture. Once finished, the shouldering task is required for years. However, a large amount of dust is inevitably accumulated easily after long-term placement, and if the model is not cleaned in time, the display effect of the model is seriously affected. And the model and the circuit are easy to damage by directly using the cleaning agent to match with wiping, and the model and the circuit are inconvenient and irreparable. Therefore, cleaning of the sand table model has been one of the problems in the exhibition hall.

For solving above-mentioned problem, application number 2019101000529's utility model application discloses an automatic clear city planning overall arrangement display device, the device include the base assembly, and fixed show assembly on the base assembly cup joints and is equipped with the intermediate layer cavity between the two, sets up the dust absorption assembly that can go up and down in the intermediate layer cavity, and the top side of dust absorption assembly is fixed sweeps the assembly, sweeps the assembly and has the pipe that sweeps that can follow sand table top horizontal slip, connects the air supply and can sweep the sand table. Because the lifting frame which is matched with the sand table groove and sleeved outside the sand table groove in the device needs to be lifted integrally, the device is only suitable for sand table models with smaller sizes, for large sand tables, the lifting of the lifting frame needs to be realized by matching with more lifting devices, the electric energy is consumed, and the cleaning cost is high.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims at providing a city planning overall arrangement display device to reduce the cost of clean sand table model.

The utility model provides a pair of city planning overall arrangement display device, include:

the top of the sand table rack is provided with a sand table groove for arranging a sand table, and the middle part of the sand table groove is provided with a containing hole;

the upper end of the upright column can penetrate through the accommodating hole and is positioned above the accommodating hole, a first air supply channel and a first air draft channel are arranged on the upright column, the exhaust end of the first air supply channel and the air inlet end of the first air draft channel are transversely arranged at the upper end of the upright column, and the air inlet end of the first air supply channel and the exhaust end of the first air draft channel are longitudinally arranged at the lower end of the upright column;

the base is arranged at the lower end of the upright post and is rotationally connected with the upright post;

the lifting device is arranged below the sand table groove and used for realizing the lifting of the base;

the cleaning pipe comprises a connector, a blowing pipe, a dust absorption pipe and a handle, wherein the connector is provided with a second air supply channel and a second air draft channel, the air inlet end of the second air supply channel can be communicated with the air exhaust end of the first air supply channel, the air exhaust end of the second air draft channel can be communicated with the air inlet end of the first air draft channel, one end of the blowing pipe is connected with the air exhaust end of the second air supply channel, the other end of the blowing pipe is a blind end, a plurality of blowing holes are formed in the blowing pipe in the extending direction, one end of the dust absorption pipe is connected with the air inlet end of the second air draft channel, the other end of the dust absorption pipe is a blind end, a plurality of dust absorption holes are formed in the dust absorption pipe in the extending direction, the dust absorption pipe is parallel to the blowing pipe, and the other ends of the blowing pipe and the dust absorption pipe are connected with the handle;

the exhaust end of the air supply equipment is connected with the air inlet end of the first air supply channel; and

and the air inlet end of the dust collection equipment is connected with the air exhaust end of the first air draft channel.

Furthermore, the purging pipe comprises a plurality of purging branch pipes which are sequentially sleeved, and a plurality of purging holes are formed in each purging branch pipe; the dust absorption pipe includes the dust absorption branch pipe that many cup joints in proper order, seted up a plurality of on the dust absorption branch pipe the dust absorption hole.

Furthermore, the exhaust end of the first air supply channel and the air inlet end of the first air draft channel are protruded outwards on the circumferential surface of the upper end of the upright post, elastic sealing gaskets are respectively sleeved outside the exhaust end of the first air supply channel and the air inlet end of the first air draft channel, the air inlet end of the second air supply channel can be sleeved outside the exhaust end of the first air supply channel, and the exhaust end of the second air draft channel can be sleeved outside the air inlet end of the first air draft channel; the end face of the air inlet end of the second air supply channel and the end face of the air exhaust end of the second air exhaust channel are arranged on the stand columns and are respectively abutted against the end faces of the elastic sealing gaskets under the locking action of the locking devices on the stand columns.

Furthermore, the upright post is longitudinally provided with a mounting hole and a sliding groove communicated with the mounting hole, the mounting hole and the sliding groove extend upwards for a certain distance from the bottom end surface of the upright post, the locking device comprises a screw rod which is longitudinally and rotatably arranged in the mounting hole and two connecting blocks which are slidably arranged in the sliding groove, the screw rod is provided with two threaded parts with opposite thread turning directions, one ends of the two connecting blocks are respectively sleeved on the two threaded parts, the connecting blocks are in threaded connection with the threaded parts, and the other ends of the two connecting blocks are respectively connected with the first locking block and the second locking block; the air inlet end of the second air supply channel is provided with a first boss extending outwards along the radial direction, the air outlet end of the second air draft channel is provided with a second boss extending outwards along the radial direction, and the first boss and the second boss are both provided with a conical surface; when the first locking block and the second locking block are both abutted against the conical surface, the locking device performs a locking function.

Further, the first locking block is provided with a first inclined surface, the second locking block is provided with a second inclined surface, and the first inclined surface and the second inclined surface are oppositely arranged in the longitudinal direction; when the first inclined surface and the second inclined surface are both abutted against the conical surface, the locking device performs a locking function.

Furthermore, two sides of the blowing pipe are respectively provided with one dust suction pipe.

The utility model has the advantages that:

1. the utility model discloses a city planning overall arrangement display device is owing to need not go up and down to the sand table frame, therefore overall structure is simple, greatly reduced the cost of clean sand table model.

2. The utility model discloses a city planning overall arrangement display device can adapt to the rectangle sand table of aspect ratio in the certain limit.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

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

FIG. 2 is a schematic perspective view of the column;

FIG. 3 is a perspective front view;

FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 3;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 3;

FIG. 6 is a cross-sectional view taken along the plane C-C of FIG. 3;

FIG. 7 is an enlarged view of the portion D of FIG. 3;

FIG. 8 is a schematic view of the structure of the cleaning tube;

FIG. 9 is a schematic structural view of a purge tube;

fig. 10 is a schematic view of the structure of the suction pipe.

Reference numerals:

10-sand tray frame, 11-sand tray groove, 12-containing hole, 13-cover plate, 14-base, 20-upright post, 21-first air supply channel, 22-first air draft channel, 23-mounting hole, 24-sliding groove, 25-elastic sealing gasket, 30-lifting device, 40-cleaning pipe, 41-connector, 411-second air supply channel, 412-second air draft channel, 413-conical surface, 42-purging pipe, 421-purging hole, 422-purging branch pipe, 43-dust-absorbing pipe, 431-dust-absorbing hole, 432-dust-absorbing branch pipe, 44-handle, 50-air supply device, 60-dust-absorbing device, 70-locking device, 71-screw, 72-connecting block, 73-first locking block, 731-first inclined surface, 74-second locking block, 741-second ramp, 80-support.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

In the description of the present application, it is to be understood that the terms "longitudinal," "transverse," "radial," "circumferential," and the like refer to an orientation or positional relationship based on that shown in the drawings, which is for convenience and simplicity of description, and does not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 to 10, the present embodiment provides a city planning layout display apparatus, which includes a sand tray rack 10, a column 20, a base 14, a lifting device 30, a cleaning pipe 40, an air supply device 50, and a dust suction device 60.

The top of sand table frame 10 is equipped with sand table groove 11 that is used for overall arrangement sand table, and the middle part of sand table groove 11 is opened has holding hole 12, and holding hole 12 is the through-hole.

The upper end of the upright post 20 can pass through the containing hole 12 and is positioned above the containing hole 12, and the top end of the upright post 20 is a cover plate 13 which covers the containing hole 12 and is used for arranging a sand table. The upright post 20 is provided with a first air supply channel 21 and a first air draft channel 22, the first air supply channel 21 and the first air draft channel 22 are approximately in an inverted L shape, namely, the exhaust end of the first air supply channel 21 and the air inlet end of the first air draft channel 22 are transversely arranged at the upper end of the upright post 20, and the air inlet end of the first air supply channel 21 and the exhaust end of the first air draft channel 22 are longitudinally arranged at the lower end of the upright post 20. The air inlet end of the first air supply channel 21 is connected with the air inlet end of the air supply device 50, and the air outlet end of the first air draft channel 22 is connected with the air inlet end of the dust suction device 60. The air blowing device 50 is a blower, and the dust suction device 60 is a dust collector, which are preferably disposed below the sand table tub 11, but of course, may be installed at different positions below the sand table tub 11 according to convenience of assembly and disassembly. The lower end of the upright post 20 is provided with a base 14, preferably, the base 14 is sleeved on the lower end of the upright post 20, the base 14 is rotatably connected with the upright post 20, and the upright post 20 can only rotate on the base 14 and can not move longitudinally relative to the base 14. The base 14 is lifted by a lifting device 30 disposed below the sand table trough 11, and the lifting device 30 may be a cylinder or other electric-driven linear reciprocating mechanism.

The cleaning pipe 40 comprises a connector 41, a blowing pipe 42, a dust suction pipe 43 and a handle 44, the connector 41 is provided with a second air supply channel 411 and a second air draft channel 412, the air inlet end of the second air supply channel 411 can be communicated with the air outlet end of the first air supply channel 21, and the air outlet end of the second air draft channel 412 can be communicated with the air inlet end of the first air draft channel 22. One end of the blowing pipe 42 is connected with the exhaust end of the second air supply channel 411, the other end of the blowing pipe 42 is a blind end, a plurality of blowing holes 421 are formed in the blowing pipe 42 along the extending direction, one end of the dust suction pipe 43 is connected with the air inlet end of the second air suction channel 412, the other end of the dust suction pipe 43 is a blind end, a plurality of dust suction holes 431 are formed in the dust suction pipe 43 along the extending direction, the dust suction pipe 43 is parallel to the blowing pipe 42, the other ends of the blowing pipe 42 and the dust suction pipe 43 are connected with the handle 44, and the blowing holes 421 and the dust suction holes 431 are all arranged downwards. Preferably, a dust suction pipe 43 is disposed at each of both sides of the purge pipe 42, and in this case, the second suction passage 412 has two air inlet ends, and each air inlet end is connected to the one end of the dust suction pipe 43, so that a better dust suction effect is achieved. Regardless of whether the sand table trough 11 is circular or rectangular, the length of the cleaning tube 40 should be such that the operator can hold the handle 44 at the peripheral edge of the sand table trough 11.

As a further improvement of the above scheme, the purging pipe 42 includes a plurality of purging branch pipes 422 sequentially sleeved, and a plurality of purging holes 421 are formed on the purging branch pipes 422; the dust suction pipe 43 includes a plurality of dust suction branch pipes 432 sequentially sleeved, and a plurality of dust suction holes 431 are formed in the dust suction branch pipes 432. Limiting structures are arranged in the blowing branch pipes 422 and the dust suction branch pipes 432, so that the plurality of blowing branch pipes 422 and the plurality of dust suction branch pipes 432 are prevented from being separated from each other in the process of being pulled out. In the condition of guaranteeing sealed effect, limit structure can be the spring and the spacer pin of setting in the inside one end of sweeping branch pipe 422 and dust absorption branch pipe 432, sets up spacing recess at the other end of sweeping branch pipe 422 and dust absorption branch pipe 432 inside, and after the spacer pin removed spacing recess in, the resistance of continuing to remove will increase, and the operator can perceive this moment. Since the limiting structure is a conventional technology, it is only described in text in this embodiment and is not shown in the drawings. When the sand table slot 11 is rectangular, the connector 41 on the cleaning pipe 40 can be first butted to the upper end of the upright post 20 in the width direction of the rectangle, and then the lengths of the purging pipe 42 and the dust suction pipe 43 can be adaptively lengthened in the process that the cleaning pipe 40 moves to the length direction of the rectangle. Because the butt joint of the cleaning pipe 40 and the upright post 20 is remotely operated outside the sand table groove 11 by an operator, the arrangement not only facilitates the butt joint of the cleaning pipe 40 and the upright post 20, but also ensures that the length of the cleaning pipe 40 is not too long.

When the lengths of the purging pipe 42 and the dust suction pipe 43 are long, a plurality of supporting members 80 may be further disposed between the upright column 20 and the edge of the sand table groove 11, and the lower ends of the supporting members 80 are connected to the base 14, so that the supporting members 80 may be lifted by the lifting device 30, and the supporting members 80 may be lifted above the sand table groove 11 as with the upright column 20.

As a further improvement of the above scheme, the exhaust end of the first air supply channel 21 and the air inlet end of the first air draft channel 22 are outwards protruded on the circumferential surface of the upper end of the upright post 20, the exhaust end of the first air supply channel 21 and the air inlet end of the first air draft channel 22 are respectively sleeved with an elastic sealing gasket 25, the air inlet end of the second air supply channel 411 can be sleeved outside the exhaust end of the first air supply channel 21, and the exhaust end of the second air draft channel 412 can be sleeved outside the air inlet end of the first air draft channel 22. The end face of the air inlet end of the second air supply channel 411 and the end face of the air outlet end of the second air draft channel 412 are respectively abutted against the end face of one elastic sealing gasket 25 under the locking action of the locking device 70 arranged on the upright post 20, and after the abutting against, a good sealing effect is realized. The provision of the locking means 70 also avoids the inconvenience of operation or damage to the sand table caused by the cleaning pipe 40 falling off the upright 20 during movement of the cleaning pipe 40 around the sand table slot 11.

As a further improvement of the above scheme, the upright post 20 is provided with a mounting hole 23 and a sliding chute 24 communicated with the mounting hole 23 along the longitudinal direction, and the mounting hole 23 and the sliding chute 24 extend from the bottom end surface of the upright post 20 to the upper end of the upright post 20 without penetrating through the upright post 20. The locking device 70 comprises a screw rod 71 which is arranged in the mounting hole 23 in a longitudinal direction and can rotate, and two connecting blocks 72 which are arranged in the sliding groove 24 in a sliding way, wherein the screw rod 71 is provided with two thread parts with opposite thread directions, the screw rod 71 is driven by a motor which is arranged at the lower end of the upright post 20, and the motor is not directly driven by the screw rod 71 but driven by a speed reducing mechanism. Since the rotation angle of the screw 71 is not large in the present embodiment, the rotation angle of the screw 71 can be controlled by an element such as a photoelectric switch. One end of each of the two connecting blocks 72 is sleeved on each of the two threaded portions, the connecting blocks 72 are in threaded connection with the threaded portions, the other ends of the two connecting blocks 72 are connected with the first locking blocks 73 and the second locking blocks 74 respectively, and the first locking blocks 73 and the second locking blocks 74 are distributed longitudinally and are symmetrical relative to a certain transverse plane. The air inlet end of the second air supply channel 411 is provided with a first boss extending outwards along the radial direction, the air outlet end of the second air draft channel 412 is provided with a second boss extending outwards along the radial direction, and the first boss and the second boss are both provided with a conical surface 413; when both the first lock block 73 and the second lock block 74 abut against the conical surface 413, the lock device 70 performs a locking function. That is, in this embodiment, when the operator aligns the cleaning pipe 40 with the upper end of the upright post 20, specifically, the air inlet end of the second blowing duct 411 is fitted over the air outlet end of the first blowing duct 21, the air outlet end of the second suction duct 412 is fitted over the air inlet end of the first suction duct 22, then, the operator presses the end of the connection head 41 with appropriate force at the handle 44, so that the end surface of the air inlet end of the second blowing channel 411 and the end surface of the air outlet end of the second suction channel 412 are both kept in contact with the elastic sealing gasket 25, then the first locking block 73 and the second locking block 74 of the locking device 70 approach each other, and abut against the above-mentioned conical surface 413, thus, the end surfaces of the air inlet end of the second air blowing passage 411 and the air outlet end of the second air draft passage 412 are always kept in contact with the elastic packing 25, and the cleaning pipe 40 is not detached from the upper end of the pillar 20. The motor and the photoelectric switch are connected with a controller (such as a PLC). The locking device 70 has a simple structure and a good locking effect.

As a further improvement of the above-mentioned solution, the first locking block 73 has a first inclined surface 731, the second locking block 74 has a second inclined surface 741, and the first inclined surface 731 and the second inclined surface 741 are disposed opposite to each other in the longitudinal direction, and preferably, the inclination angles of the first inclined surface 731 and the second inclined surface 741 are adapted to the inclination angle of the conical surface 413. When both the first inclined surface 731 and the second inclined surface 741 abut against the conical surface 413, the lock device 70 performs a locking function. With the above arrangement, when the first locking block 73 and the second locking block 74 move on the conical surface 413, the movement is smoother and the resistance is smaller.

In the specification of the present invention, a large number of specific details are explained. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. The utility model provides a city planning overall arrangement display device which characterized in that: the method comprises the following steps:

the sand table rack (10) is provided with a sand table groove (11) for arranging a sand table at the top, and the middle part of the sand table groove (11) is provided with a containing hole (12);

the upper end of the upright post (20) can penetrate through the accommodating hole (12) and is positioned above the accommodating hole (12), a first air supply channel (21) and a first air draft channel (22) are formed in the upright post (20), the exhaust end of the first air supply channel (21) and the air inlet end of the first air draft channel (22) are transversely arranged at the upper end of the upright post (20), and the air inlet end of the first air supply channel (21) and the air outlet end of the first air draft channel (22) are longitudinally arranged at the lower end of the upright post (20);

the base (14) is arranged at the lower end of the upright post (20) and is rotationally connected with the upright post (20);

the lifting device (30) is arranged below the sand table groove (11) and is used for realizing the lifting of the base (14);

cleaning tube (40), it includes connector (41), sweeps pipe (42), dust absorption pipe (43) and handle (44), connector (41) has second air supply passageway (411) and second convulsions passageway (412), the inlet end of second air supply passageway (411) can with the exhaust end intercommunication of first air supply passageway (21), the exhaust end of second convulsions passageway (412) can with the inlet end intercommunication of first convulsions passageway (22), the one end of sweeping pipe (42) with the exhaust end of second air supply passageway (411) is connected, the other end of sweeping pipe (42) is the cecum, it has a plurality of blow-off holes (421) to open along the extending direction on sweeping pipe (42), the one end of dust absorption pipe (43) with the inlet end of second convulsions passageway (412) is connected, the other end of dust absorption pipe (43) is the cecum, it has a plurality of dust absorption holes (431) to open along the extending direction on dust absorption pipe (43), the dust suction pipe (43) is parallel to the blowing pipe (42), and the other ends of the blowing pipe (42) and the dust suction pipe (43) are connected with the handle (44);

an air supply device (50) of which the exhaust end is connected with the air inlet end of the first air supply channel (21); and

and the air inlet end of the dust suction equipment (60) is connected with the air outlet end of the first air draft channel (22).

2. The city planning layout display apparatus of claim 1, wherein: the purging pipe (42) comprises a plurality of purging branch pipes (422) which are sequentially sleeved, and a plurality of purging holes (421) are formed in the purging branch pipes (422); the dust suction pipe (43) comprises a plurality of dust suction branch pipes (432) which are sequentially sleeved, and the dust suction branch pipes (432) are provided with a plurality of dust suction holes (431).

3. The city planning layout display apparatus of claim 1, wherein: the exhaust end of the first air supply channel (21) and the air inlet end of the first air draft channel (22) are outwards protruded on the circumferential surface of the upper end of the upright post (20), the exhaust end of the first air supply channel (21) and the air inlet end of the first air draft channel (22) are respectively sleeved with an elastic sealing gasket (25), the air inlet end of the second air supply channel (411) can be sleeved outside the exhaust end of the first air supply channel (21), and the air outlet end of the second air draft channel (412) can be sleeved outside the air inlet end of the first air draft channel (22); the end face of the air inlet end of the second air supply channel (411) and the end face of the air exhaust end of the second air exhaust channel (412) are arranged on the upright post (20) and are respectively abutted against the end faces of the elastic sealing gaskets (25) under the locking action of the locking device (70).

4. The city planning layout display apparatus of claim 3, wherein: the upright post (20) is provided with a mounting hole (23) and a sliding groove (24) communicated with the mounting hole (23) along the longitudinal direction, the mounting hole (23) and the sliding groove (24) extend upwards for a certain distance from the bottom end surface of the upright post (20), the locking device (70) comprises a screw rod (71) which is longitudinally and rotatably arranged in the mounting hole (23) and two connecting blocks (72) which are slidably arranged in the sliding groove (24), the screw rod (71) is provided with two threaded parts with opposite thread turning directions, one ends of the two connecting blocks (72) are respectively sleeved on the two threaded parts, the connecting blocks (72) are in threaded connection with the threaded parts, and the other ends of the two connecting blocks (72) are respectively connected with a first locking block (73) and a second locking block (74); the air inlet end of the second air supply channel (411) is provided with a first boss extending outwards along the radial direction, the air outlet end of the second air draft channel (412) is provided with a second boss extending outwards along the radial direction, and the first boss and the second boss are both provided with a conical surface (413); the locking device (70) performs a locking action when both the first locking piece (73) and the second locking piece (74) abut against the conical surface (413).

5. The city planning layout display apparatus of claim 4, wherein: the first locking block (73) has a first inclined surface (731), the second locking block (74) has a second inclined surface (741), and the first inclined surface (731) and the second inclined surface (741) are oppositely arranged in the longitudinal direction; the locking device (70) exerts a locking action when both the first inclined surface (731) and the second inclined surface (741) abut against the conical surface (413).

6. The city planning layout display apparatus of claim 1, wherein: two sides of the blowing pipe (42) are respectively provided with one dust suction pipe (43).