CN218029730U - Lifting device and flood gate - Google Patents

Abstract

The utility model discloses a lifting device and flood control door, which relates to the technical field of flood control safety facilities, wherein the lifting device is used for driving a flood control door body to lift and comprises a driving piece, a driving piece and a plurality of lifting components, the plurality of lifting components are arranged on the flood control door body at intervals, and the driving piece is connected with the plurality of lifting components through the driving piece so as to drive the plurality of lifting components to lift synchronously; when the flood-proof door body needs to be lifted, the driving piece acts to drive the lifting assemblies to lift through the driving piece, so that the flood-proof door body is lifted, the synchronism among the lifting assemblies is high, the stable lifting of the flood-proof door body is guaranteed, the occupied space of the device can be reduced, and the investment cost is reduced.

Description

Lifting device and flood gate

Technical Field

The utility model relates to a flood control safety facility technical field especially relates to a elevating gear and flood control door.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

With the rapid development of urban rail transit, subways gradually become the first choice of transportation for citizens to go out. The subway is usually arranged below the ground, is a relatively closed space, has the characteristics of concealment, blockade, high density of personnel and equipment and the like, and is difficult to evacuate and rescue. The way of communicating the subway with the outside is mainly through air shafts, entrances and exits, line openings and the like. Therefore, when flood disasters happen to cities, flood can preferentially enter the interior of the subway and rapidly spread to the whole communication area of the subway. In recent years, inland inundation disasters caused by urban rainstorm occur frequently, and the inland inundation disasters become a new form of urban underground rail transit disasters.

The entrance and exit of the subway station are the key points and the difficulty of flood prevention of the station. Some subway station access & exit are equipped with flood gate now, and when the flood takes place, rise through flood gate and shutoff flood. In order to realize the stable lifting of the flood gate, a plurality of sets of driving mechanisms are usually arranged on the flood gate, but the occupied space of the driving mechanisms is large, and the investment cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the lifting device of the flood gate occupies large space and has high investment cost. The purpose is realized by the following technical scheme:

the utility model discloses a first aspect provides a lifting device for the drive prevents flooding the door body and goes up and down, including driving piece, driving medium and a plurality of lifting unit, a plurality of lifting unit are used for the interval to set up prevent flooding on the door body, the driving piece passes through the driving medium is with a plurality of lifting unit connects respectively, and is in order to drive a plurality of lifting unit goes up and down in step.

According to the utility model discloses a lifting device, driving piece are connected with a plurality of lifting unit through the driving medium, a plurality of lifting unit with prevent flooding door body coupling. When the flood-proof door body needs to be lifted, the driving piece acts to drive the lifting assemblies to lift through the driving pieces, and therefore the lifting of the flood-proof door body is achieved. Because the quantity of the lifting components connected with the flooding-proof door body is still kept at a plurality of quantities, the lifting stability of the flooding-proof door body is ensured, meanwhile, the lifting components connected with the flooding-proof door body are driven to lift through the same driving piece, and compared with the mode that one lifting component is provided with one driving piece, the space occupied by the device can be reduced, the investment cost can be reduced, better synchronism among the lifting components is realized, and the stable rising of the flooding-proof door body is ensured.

In addition, according to the utility model discloses a lifting device still can have following additional technical characterstic:

the utility model discloses an in some embodiments, lifting unit includes lead screw spare and nut spare, lead screw spare with nut spare threaded connection, the upper end of lead screw spare be used for with prevent flooding door body coupling, the driving medium with nut spare is connected, the driving piece passes through the driving medium can drive nut spare rotates.

The utility model discloses an in some embodiments, the driving medium includes switching-over piece and transmission shaft, the switching-over piece is connected the output shaft of driving piece with between the transmission shaft, the vertical extension of output shaft, the transmission shaft extends along the horizontal direction, the transmission shaft is with a plurality of the nut spare difference transmission of lifting unit is connected.

In some embodiments of the present invention, the number of the lifting assemblies is two, the transmission shaft includes a main body section, a first end section and a second end section, the first end section is connected to the first end of the main body section through a universal joint, and the second end section is connected to the second end of the main body section through a universal joint;

the main body section is horizontally arranged, the first end section and the second end section are obliquely arranged, and one end of the first end section, which is far away from the main body section, and one end of the second end section, which is far away from the main body section, are respectively in transmission connection with the nut members of the two lifting assemblies.

In some embodiments of the present invention, the lifting device further includes two speed reducers, two speed reducers are disposed in one-to-one correspondence with the two lifting assemblies, the first end section and the second end section are respectively connected with two speed reducers in one-to-one correspondence, and the output shaft of the speed reducer is connected with the nut member.

In some embodiments of the present invention, the driving member includes a motor and a gear box, the power shaft of the motor is connected to the gear box, and the gear box is connected to the driving member.

In some embodiments of the invention, the drive member further comprises a manual shaft, the manual shaft being connected to the gear box.

In some embodiments of the present invention, the manual shaft is detachably connected to a manual wheel.

The second aspect of the utility model provides a flood gate, be in including the flood gate body and setting on the flood gate body the utility model discloses the elevating gear that the first aspect provided.

The utility model discloses the flood gate of second aspect has at least the utility model discloses the advantage of the elevating gear that the first aspect provided, no longer give unnecessary details here.

In some embodiments of the present invention, the flood gate body includes a frame structure, a front panel and a back panel, the frame structure is hollow, the front panel is connected to the front side of the frame structure, and the back panel is connected to the back side of the frame structure;

the lifting device is arranged on the frame structure.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:

fig. 1 schematically shows a schematic view of a lifting device according to an embodiment of the invention;

fig. 2 schematically shows a structural view of a flood gate body according to an embodiment of the present invention;

fig. 3 schematically shows an internal structure view of a flood gate body according to an embodiment of the present invention;

fig. 4 schematically shows a cross-sectional view of a sealing strip according to an embodiment of the invention;

fig. 5 schematically shows a schematic view of a flood gate according to an embodiment of the present invention, wherein the flood gate body is in a raised state;

fig. 6 schematically shows a schematic view of a flood gate according to an embodiment of the present invention, wherein the flood gate body is in a retracted state.

The reference numbers are as follows:

100-flooding prevention door body; 101-a frame structure; 102-a front panel; 104-a transverse bar; 105-a longitudinal rod; 106-a first lightening hole; 107-second lightening holes; 108-a guide wheel; 110-a reinforcement plate; 111-a base plate; 112-a circumferential plate; 113-reinforcing ribs; 114-floor tile; 120-a manual wheel disc; 200-a door frame; 201-horizontal frame body; 202-a vertical frame body; 203-a pilot hole; 204-a guide track; 300-a sealing strip; 301-a fixed part; 302-a seal; 410-a drive member; 411-an electric machine; 412-a gearbox; 413-a manual shaft; 414-an output shaft; 421-a reversing member; 422-a transmission shaft; 423-body section; 424-first end section; 425-a second end section; 430-a lifting assembly; 440-reducer.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience in description, the relationship of one element or feature to another element or feature as illustrated in the figures may be described herein using spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "over", and the like. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "in 8230 \8230; below" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1-6, according to the utility model discloses an embodiment provides a flood gate, including flood gate body 100 and door frame 200, flood gate body 100 sets up on door frame 200, and the bottom of door frame 200 is pre-buried in the ground, and the top of flood gate frame 200 exposes, and flood gate body 100 can move along the direction of height of flood gate frame 200.

The door frame 200 includes two vertical frames 202 disposed opposite to each other and a horizontal frame 201 connected between the vertical frames 202. The transverse frame body 201 is provided with a guide hole 203 for the flood gate body 100 to pass through. The vertical frame 202 is provided with a guide rail 204. The flood-proof door body 100 is sleeved in the guide hole 203, the reinforcing plate 110 is always positioned above the transverse frame body 201, and the width of the reinforcing plate 110 is greater than that of the guide hole 203. The two ends of the flood-proof door body 100 are provided with guide wheels 108, and the guide wheels 108 are matched with the guide tracks 204, so that the flood-proof door body 100 can be conveniently lifted.

The flood gate of the present embodiment can be applied to the entrance and exit of a subway, when the subway normally operates, the flood gate body 100 is located at the underground part of the door frame 200, that is, in the retracted state, and the top of the flood gate body 100 is approximately aligned with the transverse frame 201. When a subway entrance or a subway exit needs to be blocked by flood, the flood prevention door body 100 rises along the vertical frame body from the guide hole 203 of the horizontal frame body 201 to form a rising state so as to block the flood.

The flood-proof door body 100 comprises a frame structure 101, the frame structure 101 is arranged in a hollow mode, a front panel 102 is connected to the front side of the frame structure 101, a back panel is connected to the back side of the frame structure 101, a reinforcing plate 110 is connected to the top of the frame structure 101, the thickness from the front side to the back side of the frame structure 101 is a, the width of the reinforcing plate 110 along the direction from the front side to the back side of the frame structure 101 is b, and b is larger than a. The width b of the reinforcing plate 110 of the flood-proof door body 100 is greater than the thickness a of the frame structure 101, the reinforcing plate 110 is connected to the top of the frame structure 101, and forms a substantially T-shaped reinforcing structure with the frame structure 101, so that the reinforcing structure can bear higher load and ensure the strength of the flood-proof door body 100; the frame structure 101 is hollowed out, so that the weight of the flooding-proof door body 100 is reduced on the premise that the strength of the flooding-proof door body 100 is ensured. In the construction process, as the flood-proof door body 100 has lighter weight, the transportation and the installation position adjustment are more convenient, and the installation is convenient; when encountering flood, the flood-proof door body 100 is also convenient to rapidly lift.

The frame structure 101 of the flood-proof door body 100 of the present embodiment includes a rectangular frame body, a transverse rod 104 and a longitudinal rod 105 are arranged in the frame body, two ends of the transverse rod 104 are fixedly connected to two transverse ends of the frame respectively, two ends of the longitudinal rod 105 are fixedly connected to two longitudinal ends of the frame respectively, and the transverse rod 104 is fixedly connected to the longitudinal rod 105 in a crossing manner. A plurality of first lightening holes 106 are arranged on the transverse rod 104 at intervals along the extending direction of the transverse rod 104; the longitudinal bar 105 is provided with a plurality of second lightening holes 107 at intervals along the extending direction of the longitudinal bar 105.

It can be understood that the first lightening holes 106 and the second lightening holes 107 can reduce the weight of the flood gate body 100 in the case of raising the flood gate body 100.

In one specific implementation, one side of the reinforcing plate 110 located on the back side of the frame structure 101 protrudes from the frame structure 101, and one side of the reinforcing plate 110 located on the front side of the frame structure 101 protrudes from the frame structure 101.

Referring to fig. 2 and 3, the center of the reinforcement plate member 110 in the thickness direction (the front-rear direction of fig. 2) is aligned with the center of the frame structure 101 in the thickness direction, that is, the reinforcement plate member 110 is disposed on the frame structure 101 in axial symmetry with respect to the center of the frame structure 101 in the thickness direction, the rear side of the reinforcement plate member 110 extends to the rear side of the frame structure 101, and the front side of the reinforcement plate member 110 extends to the front side of the frame structure 101. The reinforcing plate 110 is matched with the frame structure 101 to form a standard T-shaped structure, and the reinforcing plate can be suitable for a large-span flood-proof door body 100 and can bear higher load. In addition, the reinforcing plate member 110 in this form can cover the guide hole 203 of the doorframe 200 for the movement of the reinforcing plate member 110, so as to play a role in sealing, and prevent sundries and the like from entering the guide hole 203 of the doorframe 200 to influence the normal use of the flood gate body 100.

Preferably, the width (width refers to the dimension along the front-back direction in fig. 2) of the reinforcement plate 110 is greater than the width of the guide hole 203, so as to ensure that the reinforcement plate 110 can completely cover the guide hole 203 when the flood gate body 100 is in the stowed state.

Further, as shown in fig. 3, the reinforcing plate member 110 includes a bottom plate 111 and a circumferential plate 112, the bottom plate 111 is fixedly connected with the frame structure 101, and the circumferential plate 112 is arranged around the circumferential edge of the bottom plate 111, so that the top surface of the reinforcing plate member 110 is arranged in a groove shape.

Specifically, the bottom plate 111 is provided with a plurality of reinforcing ribs 113 at intervals along the longitudinal direction (the left-right direction shown in fig. 2) of the bottom plate 111, and the plurality of reinforcing ribs 113 divide the groove-like space into a plurality of grooves, each of which can be matched with the size of the floor tile 114 to be installed.

It will be appreciated that the reinforcing ribs 113 may increase the strength of the reinforcing plate 110 and facilitate the fixing of the floor tiles 114.

Further, floor tiles 114 corresponding to floor tiles on which the flood gate body 100 is located are laid on the bottom plate 111 on the inner side of the circumferential plate 112.

It can be understood that the floor tiles are arranged on the reinforcing plate 110, so that the surface structure of the flood gate is consistent with the ground in the retracted state, and the flood gate is more attractive.

The flood gate body 100 shown in fig. 3 omits the front panel 102, the rear panel, and the floor tiles 114.

The flooding-proof door frame 200 of the embodiment is further provided with a sealing strip 300, and when the flooding-proof door body rises to an open state, the flooding-proof door body 100 abuts against the sealing strip 300; the cross section of sealing strip 300 is the dovetail table formula, and sealing strip 300 includes fixed part 301 and the sealing 302 of integral structure, fixed part 301 and door frame 200 fixed connection, and sealing 302 sets up in the one side that is close to flood-proof door body 100 of fixed part 301 and is located the below of fixed part 301, and sealing 302 inclines to set up.

When the flood gate body 100 is in a raised state for flood control, the flood gate body 100 abuts against the fixing portion 301 and the sealing portion 302 of the weather strip 300, presses the sealing portion 302, and moves the sealing portion 302 to the side where the door frame 200 is located. This kind of desk-top sealing strip 300 leakproofness of forked tail is better, and when the flood pressure of the environment that flood prevention door body 100 is located was big more, flood prevention door body 100 compressed tightly the effort to sealing 302 big more, is favorable to sealing more, so this sealing strip 300 can guarantee still when great flood, guarantees flood prevention door body 100 and door frame 200's inseparable sealing.

In order to realize the rapid lifting of the flood gate body 100, the embodiment further provides a lifting device, and the lifting device is used for driving the flood gate body 100 to lift. The lifting device is arranged on the flood-proof door body 100.

The lifting device comprises a driving element 410, a transmission element and a plurality of lifting assemblies 430, wherein the plurality of lifting assemblies 430 are arranged on the flood-proof door body 100 at intervals, and the driving element 410 is connected with the two lifting assemblies 430 through the transmission element so as to drive the plurality of lifting assemblies 430 to lift synchronously.

It can be understood that the driving member 410 is connected to a plurality of lifting assemblies 430, that is, a plurality of lifting assemblies 430, through a transmission member, and the plurality of lifting assemblies 430 are connected to the flood gate body 100. When the flood-proof door body 100 needs to be lifted, the driving part 410 acts to drive the lifting assemblies 430 to lift through the driving part, so that the lifting of the flood-proof door body 100 is realized. Because the number of the lifting assemblies 430 connected with the flood-proof door body 100 is still kept to be a plurality, the lifting stability of the flood-proof door body 100 is ensured, and meanwhile, compared with the mode that one lifting assembly 430 is provided with one driving member 410, the lifting assemblies 430 connected with the flood-proof door body 100 are driven to lift through the same driving member 410, the occupied space of the device can be reduced, and the investment cost can be reduced.

In a specific implementation manner, the lifting assembly 430 includes a screw rod member and a nut member, the screw rod member is in threaded connection with the nut member, the upper end of the screw rod member is used for being connected with the flood-proof door body 100, a transmission member is connected with the nut member, and the driving member 410 can drive the nut member to rotate through the transmission member.

The lead screw member and the nut member are matched to form a lead screw nut assembly, and in this embodiment, the driving member is driven by the driving member 410 to drive the nut member to rotate, so that the lead screw member is forced to move up and down, and thus the lifting of the flood-proof door body 100 is realized under the action of the lead screw member.

Specifically, the driving member 410 includes a motor 411 and a gear box 412, a power shaft of the motor 411 is connected to the gear box 412, and an output shaft 414 of the gear box 412 is connected to the transmission member. The motor 411 drives the transmission member to rotate through a gear assembly in the gear box 412, and the transmission member in turn drives the nut member to rotate.

It can be understood that the gear box 412 can change the power output direction of the motor 411, which is beneficial to the arrangement of the components on the flood gate body 100.

The driving member 410 of the present embodiment further includes a manual shaft 413, and the manual shaft 413 is connected to the transmission member. The manual shaft 413 can be connected with the gear box 412, and the manual shaft 413 can drive the transmission piece to rotate through the gear box 412, so that the nut piece is driven to rotate manually, and the flood gate body 100 is lifted.

In this embodiment, through setting up manual axle 413, under the outage condition, can adopt manual mode drive lifting unit 430 to go up and down, avoid under the emergency power failure condition, take place the condition that flood-proof door body 100 is difficult to close.

The manual wheel 120 is detachably connected to the manual shaft 413 of this embodiment, and when manual driving is required, the manual wheel 120 can be mounted on the manual shaft 413. When the manual driving is not needed, the manual shaft 413 may not be installed with the manual wheel disc 120, and at this time, a protective cover may be disposed at a position of the manual shaft 413 for connecting the manual wheel disc 120, so as to avoid a potential safety hazard caused by the rotation of the manual shaft 413 with the motor 411.

Referring to fig. 1, the transmission member includes a reversing member 421 and a transmission shaft 422, the reversing member 421 is connected between the output shaft 414 of the driving member 410 and the transmission shaft 422, the output shaft 414 extends vertically, the transmission shaft 422 extends horizontally, and the transmission shaft 422 is in transmission connection with the nut members of the plurality of lifting assemblies 430, respectively.

Specifically, the number of the lifting assemblies 430 is two, the transmission shaft 422 includes a main body segment 423, a first end segment 424 and a second end segment 425, the first end segment 424 is connected to the first end of the main body segment 423 through a universal joint, and the second end segment 425 is connected to the second end of the main body segment 423 through a universal joint; the main body section 423 is horizontally arranged, the first end section 424 and the second end section 425 are obliquely arranged, and one end of the first end section 424, which is far away from the main body section 423, and one end of the second end section 425, which is far away from the main body section 423, are in transmission connection with the nut members of the two lifting assemblies 430 respectively.

The lifting device further comprises two speed reducers 440, the two speed reducers 440 are arranged in one-to-one correspondence with the two lifting assemblies 430, the first end sections 424 and the second end sections 425 are respectively connected with the two speed reducers 440 in one-to-one correspondence, and output shafts of the speed reducers 440 are connected with the nut members.

In the lifting device of this embodiment, the motor 411 drives the output shaft 414 to rotate, the output shaft 414 is connected to the transmission shaft 422 through the reversing element 421, two ends of the transmission shaft 422 are respectively connected to the speed reducer 440, and the power of the motor 411 is reduced in speed by the speed reducer 440 and then applied to the nut element.

It can be understood that one motor 411 drives two lifting assemblies 430 to lift simultaneously, and under the condition that the same speed reducer 440 is provided, the lifting assemblies 430 can be ensured to lift synchronously, so as to avoid the flooding-proof door body 100 from inclining.

In a particular arrangement, the lifting device is provided on the frame structure 101, and is located primarily between the front face 102 and the back panel. The motor 411 is fixed at a position near the top of the middle of the flood-proof door body 100, the output shaft 414 penetrates through the first lightening holes 106 of the transverse rod 104 and is arranged along the vertical direction, the transmission shaft 422 is arranged along the horizontal direction, two ends of the transmission shaft 422 are respectively connected with a speed reducer 440, and the output shaft of the speed reducer 440 is connected with the nut member to drive the nut member to rotate. The reinforcing plate 110 is inserted into the upper end of the manual shaft 413 so as to be connected to the manual wheel 120.

The lifting device of the flood gate adopts the same set of transmission structure in the electric mode and the manual mode, so that the complexity and the failure rate of the transmission structure are greatly reduced. The lifting device of the flood-proof door adopts a reasonable transmission design, has a simple and efficient transmission structure, is safe and reliable, is convenient to overhaul, integrates electric control and manual control into a whole, drives the transmission shaft 422 to rotate by the motor 411 in an electric mode, transmits driving force to the lifting assembly 430 in a screw rod form through the transmission shaft 422, and realizes the ascending and descending of the flood-proof door body 100 through the lifting assemblies 430 on the left side and the right side. Under manual mode, motor 411 is out of work this moment, installs the manual rim plate 120 of depositing alone on manual axle 413, through manual rotatory manual rim plate 120, can drive transmission shaft 422 and rotate, transmits drive power to the elevating screw through same set of transmission shaft 422, realizes the rising and the decline of the anti-flooding door body 100.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A lifting device is used for driving a flood-proof door body to lift and is characterized by comprising a driving piece, a transmission piece and a plurality of lifting assemblies, wherein the plurality of lifting assemblies are arranged on the flood-proof door body at intervals, and the driving piece is respectively connected with the plurality of lifting assemblies through the transmission piece so as to drive the plurality of lifting assemblies to lift synchronously.

2. The lifting device as claimed in claim 1, wherein the lifting assembly comprises a screw member and a nut member, the screw member is connected to the nut member by a screw thread, the upper end of the screw member is used for connecting to the flood-proof door body, the transmission member is connected to the nut member, and the driving member can drive the nut member to rotate through the transmission member.

3. The lifting device as claimed in claim 2, wherein the transmission member includes a reversing member and a transmission shaft, the reversing member is connected between an output shaft of the driving member and the transmission shaft, the output shaft extends vertically, the transmission shaft extends horizontally, and the transmission shaft is in transmission connection with the nut members of the plurality of lifting assemblies, respectively.

4. The lifting device as claimed in claim 3, wherein the number of the lifting assemblies is two, the transmission shaft comprises a main body section, a first end section and a second end section, the first end section is connected to the first end of the main body section through a universal joint, and the second end section is connected to the second end of the main body section through a universal joint;

the main body section is horizontally arranged, the first end section and the second end section are obliquely arranged, and one end of the first end section, which is far away from the main body section, and one end of the second end section, which is far away from the main body section, are respectively in transmission connection with the nut members of the two lifting assemblies.

5. The lifting device according to claim 4, further comprising two speed reducers, wherein the two speed reducers are disposed in one-to-one correspondence with the two lifting assemblies, the first end section and the second end section are respectively connected to the two speed reducers in one-to-one correspondence, and an output shaft of the speed reducer is connected to the nut member.

6. A lifting device as claimed in any one of claims 1 to 5, characterized in that the drive member comprises a motor and a gearbox, the power shaft of the motor being connected to the gearbox and the gearbox being connected to the transmission member.

7. The lift device of claim 6, wherein the drive member further comprises a manual shaft, the manual shaft being connected to the gear box.

8. The lifting device as claimed in claim 7, wherein the manual shaft is detachably connected with a manual wheel.

9. A flood gate which is characterized by comprising a flood gate body and the lifting device which is arranged on the flood gate body and is provided with any one of the claims 1 to 8.

10. The flood gate of claim 9, wherein the flood gate body comprises a frame structure, a front panel and a back panel, the frame structure is hollow, the front panel is attached to the front of the frame structure, and the back panel is attached to the back of the frame structure;

the lifting device is arranged on the frame structure.

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