CN211574694U

CN211574694U - Shallow foundation pit large-stroke lifting screen

Info

Publication number: CN211574694U
Application number: CN201922199401.5U
Authority: CN
Inventors: 杨全明; 杨同焱
Original assignee: Hangzhou Youbang Performing Arts Equipment Co ltd
Current assignee: Hangzhou Youbang Performing Arts Equipment Co ltd
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-09-25
Anticipated expiration: 2029-12-10

Abstract

The utility model provides a shallow big stroke lift screen of pit relates to projection screen technical field, including foundation ditch seat and the crane of being connected with the foundation ditch seat, the crane includes first support body and second support body, be provided with first stand on the first support body and set up the first piece that sets up to foundation ditch seat inner wall direction extension on first stand, be provided with down guide wheel and last guide wheel on the first stand, be provided with the second stand on the second support body and set up the second piece that sets up to first stand direction extension on the second stand, be provided with the tight pulley on the foundation ditch seat and pass the tight pulley in proper order, first piece, lower guide wheel, go up the connection steel wire that guide wheel and second piece are connected, first support body and second support body outside are provided with the projection board. The utility model relates to a shallow pit large stroke lift screen simple structure can go up and down, and does not occupy foundation ditch space, low in cost, advantage that the maintenance cost is low, arrange simply, energy-concerving and environment-protective.

Description

Shallow foundation pit large-stroke lifting screen

Technical Field

The utility model relates to the technical field of projection screens,

especially, the utility model relates to a shallow pit large stroke lift screen.

Background

Along with the increasing abundance of cultural life, people have higher and higher requirements on stage effects in performance activities, and in order to enable performance arts to generate unusual special effects, various types of stage mechanical equipment are installed in modern various large-scale performance places and the like, and the stage mechanical equipment plays the roles of drawing dragon eyes and making a look in the stage performance.

In order to continuously innovate the performance mode of the performance, more and more novel and high-tech vision enjoyment is pursued, and in the practical process, in order to meet the requirement, directors and related technicians design more and more stages, Chinese people have special feelings to water, so that water elements are presented on the stages in various modes, and various water show performances are born in the large background. In order to match with rendering atmosphere of the performance in the water show performance, a plurality of laser projections are required to be matched for application, so that a proper lifting projection screen needs to be matched for the water show performance. The traditional lifting screen has high requirement on the depth of a foundation pit, the height of the traditional lifting screen is generally 1.5 times of the height of the lifting screen, the height of 10 m is a relatively common size for an outdoor projection screen, the depth of the foundation pit is required to be 15 m, the difficulty of building the foundation pit is very high, and the height of a projection screen is forced to be reduced in certain areas due to the fact that the foundation pit meeting the requirement cannot be built due to geological relations, so that the performance effect cannot reach the expectation. And the driving mechanism of the traditional lifting screen generally adopts a hydraulic or rigid chain structure, and the structure inherently has own advantages, such as stable lifting, large bearing capacity and the like, but has obvious defects of high cost, no water and dust resistance, occupation of foundation pit space and the like when being used as an outdoor lifting screen.

Therefore, in order to solve the above problems, it is necessary to design a reasonable shallow pit large stroke lifting screen.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a simple structure can go up and down, and does not occupy foundation ditch space, low in cost, the advantage that the maintenance cost is low, arrange simple and easy, energy-concerving and environment-protective shallow pit large stroke lift screen.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a shallow pit large stroke lift screen, including the foundation ditch seat and with the crane that the foundation ditch seat is connected, the crane includes first support body and second support body, be provided with first stand on the first support body and set up in on the first stand to the first piece that foundation ditch seat inner wall direction extended the setting, be provided with down guide wheel and last guide wheel on the first stand, be provided with the second stand on the second support body and set up in on the second stand to the second piece that first stand direction extended the setting, be provided with the tight pulley on the foundation ditch seat and pass in proper order tight pulley, first piece, lower guide wheel, go up the guide wheel with the connection steel wire that the second piece is connected, first support body and second support body outside are provided with the projection board.

As the utility model discloses a preferred, the quantity of connecting steel wire, first stand and second stand all is two at least, and is a plurality of second stand length is all inequality.

As an optimization of the utility model, the first frame body is an isosceles trapezoid steel frame.

As the utility model discloses a preferred, second support body upper surface slope sets up.

As the utility model discloses a preferred, foundation ditch seat inner wall is provided with and is used for the convenience first gliding first spout of piece.

As the utility model discloses a preferred, be provided with on the first stand and be used for the convenience the gliding second spout of second piece.

As the utility model discloses a preferred, first spout and second spout are vertical direction and extend the setting.

As the utility model discloses a preferred, the quantity of tight pulley, lower guide wheel and last guide wheel all is one at least.

As the utility model discloses a preferred, the projection board is perforation aluminum plate, just the perforation quantity on the projection board is one at least.

As the utility model discloses a preferred, be provided with on the foundation ditch seat with connect the hoist engine that the steel wire is connected, the hoist engine is provided with the PLC controller, be provided with on the second support body with the position inductor that the PLC controller electricity is connected.

The utility model relates to a shallow pit large stroke lift screen beneficial effect lies in: the lifting device has the advantages of simple structure, capability of lifting, no occupation of foundation pit space, low manufacturing cost, low maintenance cost, simple arrangement, energy conservation and environmental protection.

Drawings

Fig. 1 is a schematic structural view of the shallow pit large-stroke elevating screen of the present invention when it is expanded;

FIG. 2 is a schematic structural view of the shallow pit large stroke elevating screen of the present invention during folding;

fig. 3 is a schematic structural view of a first frame body of a shallow pit large-stroke elevating screen of the present invention;

fig. 4 is a schematic structural view of a second frame body of the shallow pit large-stroke elevating screen of the present invention;

in the figure: 1. foundation ditch seat, 11, tight pulley, 12, connection steel wire, 2, crane, 21, first support body, 211, first stand, 212, first piece, 213, lower guide wheel, 214, go up guide wheel, 22, second support body, 221, second stand, 222, second piece, 23, projection board.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

The first embodiment is as follows: as shown in fig. 1 to 4, which is only one embodiment of the present invention, a large-stroke lift screen for shallow foundation pits includes a foundation pit base 1 and a lift frame 2 connected to the foundation pit base 1, wherein the lift frame 2 includes a first frame body 21 and a second frame body 22, the first frame body 21 is provided with a first upright post 211 and a first block 212 arranged on the first upright post 211 and extending toward the inner wall of the foundation pit base 1, the first upright post 211 is provided with a lower guide wheel 213 and an upper guide wheel 214, the second frame body 22 is provided with a second upright post 221 and a second block 222 arranged on the second upright post 221 and extending toward the first upright post 211, the foundation pit base 1 is provided with a fixed wheel 11 and a connecting steel wire 12 sequentially passing through the fixed wheel 11, the first block 212, the lower guide wheel 213, the upper guide wheel 214 and connected to the second block 222, a projection plate 23 is arranged outside the first frame body 21 and the second frame body 22.

The utility model discloses in, connect steel wire 12 through the hoist engine pulling, first support body 21 and second support body 22 just can upwards rise in foundation ditch seat 1, loosen connection steel wire 12 otherwise, first support body 21 and second support body 22 just descend and hide, and adopt doubles lift principle, compare in traditional integral type elevating screen, can reduce demand foundation ditch degree of depth by one time, this design has creatively adopted connection steel wire 12 traction mode in actuating system simultaneously, separate drive arrangement (hoist engine) and crane 2, connection steel wire 12 of crane 2 passes through tight pulley 11, the direction of lower guide pulley 213 and last guide pulley 214 can arrange the hoist engine outside the foundation ditch, owing to install with the drive separation through connection steel wire 12 towed crane 2 simultaneously, the event can be used for crane 2 in extreme environment such as the aquatic.

The lifting frame 2 is divided into a two-layer structure and comprises a first frame body 21 and a second frame body 22.

Firstly, be provided with first stand 211 on first support body 21 and set up in on first stand 211 to the first piece 212 that 1 inner wall direction of foundation ditch seat extended the setting, just 1 inner wall of foundation ditch seat is provided with and is used for making things convenient for the gliding first spout of first piece 212, first spout extends the setting for vertical direction, namely when hoist engine pulling connecting wire 12, first support body 21 rises along first spout is vertical upwards under first stand 211 is spacing.

Then be second support body 22, be provided with down guide wheel 213 and last guide wheel 214 on first stand 211, be provided with second stand 221 on the second support body 22 and set up in second stand 221 is to the second piece 222 that first stand 211 direction extended setting, first stand 211 is a movable pulley in fact, is a guide post again, be provided with on first stand 211 and be used for making things convenient for the gliding second spout of second piece 222, and the second spout extends the setting for vertical direction, namely when connecting wire 12 was taut, under the circumstances that first stand 211 rose, second stand 221 rose upwards along the second spout relative to first stand 211.

Like this doublestage goes up and down, effectively reduces the demand of foundation ditch seat 1 degree of depth, and when foundation ditch seat 1 height limit, crane 2 rises the theoretical maximum value of height and is the twice of foundation ditch seat 1. Or put it another way, when the crane 2 height that needs to rise is constant, adopt the utility model discloses a 1 degree of depth of foundation ditch seat is half the height that is the lift at minimum theoretically.

It should be noted that the first block 212 is provided with a through hole for allowing the connecting steel wire 12 to pass through conveniently, the second block 222 is provided with a fixing buckle for fixing the end of the connecting steel wire 12, the first block 212 is movably connected with the connecting steel wire 12, and the connecting steel wire 12 can pass through the through hole of the first block 212, and is fixedly connected with the fixing buckle arranged above the second block 222 after sequentially bypassing the lower guide wheel 213 and the upper guide wheel 214.

Of course, the quantity of connecting steel wire 12, first stand 211 and second stand 221 all is two at least, and connecting steel wire 12, first stand 211 and second stand 221 are two generally speaking, and set up respectively in the both sides of foundation ditch seat 1, and two first stands 211 set up at foundation ditch seat 1 inner wall, and two second stands 221 set up between two first stands 211, and a first stand 211 and second stand 221 are connected to a connecting steel wire 12, and both ends go up and down simultaneously like this, and crane 2 is more stable.

Finally first support body 21 and second support body 22 outside are provided with projection board 23, projection board 23 is also projection screen, a light for accepting light and shadow lamp source transmission comes, projection board 23 should set up with first support body 21 and second support body 22 lateral surface level, also can set up along first support body 21 and second support body 22 side line, only need projection board 23 upper end and second support body 22 upper end to be connected, projection board 23 lower extreme is connected with first support body 21 lower extreme, projection board 23 expandes when guaranteeing first support body 21 and second support body 22 to rise, and projection board 23 expandes highly equals the sum of first support body 21 and second support body 22 height.

In order to facilitate the connection between the projection plate 23 and the first frame body 21 and the second frame body 22, the side edges of the first frame body 21 and the second frame body 22 are provided with mounting posts extending outwards. Preferably, the mounting posts are disposed outside of the first vertical posts 211 so that movement of the first vertical posts 211 and the second vertical posts 221 does not affect the mounting posts, and in this case, it is advantageous that the width of the projection plate 23 can be greater than the distance between the two first vertical posts 211.

Of course, the lengths of the first upright posts 211 must be the same, so that the rising height of the first frame 21 needs to be fixed to ensure that the second frame 22 does not slide out of the second sliding groove, but the lengths of the second upright posts 221 may be different, so that the rising heights of the two ends of the second frame 22 may be different, so that the projection screen 23 may have different rising heights and may be extended to different positions to receive light projection.

The utility model relates to a shallow pit large stroke lift screen simple structure can go up and down, and does not occupy foundation ditch space, low in cost, advantage that the maintenance cost is low, arrange simply, energy-concerving and environment-protective.

Embodiment two, still as shown in fig. 1 to 4, only be the utility model discloses a one of them embodiment, in order to make the utility model relates to a shallow pit large stroke elevating screen's regulation effect is better, and stability is higher, the utility model discloses in still have following design:

first, the first frame body 21 is an isosceles trapezoid steel frame, so that the stability of the first frame body 21 is higher.

Moreover, the upper surface of the second frame 22 is inclined, and the heights of the lower ends of the plurality of second vertical columns 221 are the same, but the heights of the upper ends of the second vertical columns 221 may be different, so that the upper surface of the second frame 22 is inclined.

Then, install the support supporting legs in foundation ditch seat 1 department bottom and foundation ditch seat 1 bottom pre-buried being connected, adopt square pipe welding to form, the surface prevents to rust, convenient for the hot-galvanize processing the utility model discloses the device sets up and uses under water.

In addition, the projection plate 23 is a perforated aluminum plate, and the number of perforations on the projection plate 23 is at least one. Projection board 23 passes through rivet (erection column) to be fixed on first support body 21 and second support body 22 surface, and projection board 23 adopts the preparation of 3mm thickness perforated aluminum plate, and aluminum plate has lighter quality and higher rust-resistant ability, and the perforation size is diameter 5mm, and the hole interval is 20mm, and perforated aluminum plate can effectively reduce the wind pressure, provides the guarantee for outdoor performance.

And finally, a winch connected with the connecting steel wire 12 is arranged on the foundation pit seat 1, the winch is provided with a PLC (programmable logic controller), and a position sensor electrically connected with the PLC is arranged on the second frame body 22. Crane 2 uses the hoist engine as the drive, and through the rotation of PLC control hoist engine reel, the direction through first stand 211 and second stand 221 and the traction of connecting wire 12 upwards rise first support body 21 and second support body 22, the design has position sensor and is connected with the PLC controller simultaneously on second support body 22, send the motion gesture of second support body 22 to the PLC controller and form closed loop control, can be real-timely with the threshold value that sets up contrast and adjust the motion of hoist engine, avoid appearing leading to the uncontrollable condition appearance to appear in the motion gesture because of the hoist engine zero offset appears in long-time motion.

The present invention is not limited to the above-described specific embodiments, and various modifications and changes are possible. Any modification, equivalent replacement, improvement and the like made to the above embodiments according to the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. The utility model provides a shallow foundation pit large stroke lift screen which characterized in that: the lifting frame (2) is connected with the foundation pit base (1), the lifting frame (2) comprises a first frame body (21) and a second frame body (22), a first upright post (211) and a first block (212) which is arranged on the first upright post (211) and extends towards the inner wall direction of the foundation pit base (1) are arranged on the first frame body (21), a lower guide wheel (213) and an upper guide wheel (214) are arranged on the first upright post (211), a second upright post (221) and a second block (222) which is arranged on the second upright post (221) and extends towards the direction of the first upright post (211) are arranged on the second frame body (22), a fixed wheel (11) is arranged on the foundation pit base (1), and a connecting steel wire (12) which is connected with the second block (222) sequentially penetrates through the fixed wheel (11), the first block (212), the lower guide wheel (213) and the upper guide wheel (214), and projection plates (23) are arranged on the outer sides of the first frame body (21) and the second frame body (22).

2. The shallow pit large-stroke lifting screen as claimed in claim 1, wherein: the quantity of connecting wire (12), first stand (211) and second stand (221) all is two at least, and is a plurality of second stand (221) all are all inequality.

3. The shallow pit large-stroke lifting screen as claimed in claim 1, wherein: the first frame body (21) is an isosceles trapezoid steel frame.

4. A shallow pit large stroke elevating screen as claimed in claim 2, wherein: the upper surface of the second frame body (22) is obliquely arranged.

5. The shallow pit large-stroke lifting screen as claimed in claim 1, wherein: the inner wall of the foundation pit seat (1) is provided with a first sliding groove used for facilitating the sliding of the first block (212).

6. A shallow pit large-stroke lifting screen as claimed in claim 5, wherein: the first upright post (211) is provided with a second sliding groove used for facilitating the sliding of the second block (222).

7. A shallow pit large-stroke lifting screen as claimed in claim 6, wherein: the first sliding groove and the second sliding groove are both arranged in a vertical extending mode.

8. The shallow pit large-stroke lifting screen as claimed in claim 1, wherein: the number of the fixed wheels (11), the lower guide wheels (213) and the upper guide wheels (214) is at least one.

9. The shallow pit large-stroke lifting screen as claimed in claim 1, wherein: the projection plate (23) is a perforated aluminum plate, and the number of perforations on the projection plate (23) is at least one.

10. The shallow pit large-stroke lifting screen as claimed in claim 1, wherein: the foundation pit base (1) is provided with a winch connected with the connecting steel wire (12), the winch is provided with a PLC (programmable logic controller), and the second frame body (22) is provided with a position sensor electrically connected with the PLC.