KR101646229B1

KR101646229B1 - Elevating possible floodgate

Info

Publication number: KR101646229B1
Application number: KR1020150185064A
Authority: KR
Inventors: 강성수; 박진춘; 채형구
Original assignee: (주)엠닉스
Priority date: 2015-12-23
Filing date: 2015-12-23
Publication date: 2016-08-08

Abstract

The present invention relates to a tipping floodgate capable of ascending and descending, and more specifically, to a tipping floodgate capable of ascending and descending which gives an ascending/descending function to a conventional tipping floodgate which releases stored water by allowing the floodgate to tip over when the stored water increases to a management level or higher to artificially control a water level to prevent contamination by decomposition of sediment accumulated on a lower portion of the floodgate and soil sedimentation by periodically lifting the floodgate. According to the present invention, the tipping floodgate capable of ascending and descending is installed on a bank (B) to store or control water of a reservoir or a river, and comprises: a floodgate body (10) comprising a rectangular floodgate (11) to block a discharge passage of the bank (B), and a floodgate shaft (12) positioned on a lower portion of the floodgate and extended to the outside of the floodgate; a first operational unit (20) connected to both ends of the floodgate shaft (12) to receive a drive force of a drive means (30) to allow the floodgate to tip over; and a second operational unit (40) which is connected to both ends of the floodgate shaft (12), is coaxially arranged with the first operational unit (20), and lifts and lowers the floodgate.

Description

{Elevating possible floodgate}

The present invention relates to a conduit gate capable of ascending and descending, and more particularly, to a conduit gate capable of ascending and descending, and more particularly, The present invention relates to a conduit gate capable of preventing contamination due to decay of sediments deposited at the bottom of a hydrological pile through periodic hydrological lift and capable of moving up and down to prevent sediment accumulation.

Generally, the conduction gate is used to drain or regulate the water in a reservoir or a river. When the water is stored in an irrigation water reservoir such as an irrigation water reservoir or a reservoir for storing water, and the water needs to be appropriately utilized for agricultural land management and irrigation water It is used for the purpose of discharging water.

That is, in case of drought, the water is stored and the water is stored. When the water level rises due to a lot of rain, the water gate is installed to open and discharge the water. .

Therefore, the water is discharged mainly to the upper part, so that the water in the upper layer of the water that has been stored becomes drainage, and the lower layer water becomes congested without being circulated, and foreign materials such as sand are deposited on the bottom of the reservoir, Water becomes contaminated and causes interference with the complete opening of the water gate and damages it.

In order to solve such a problem, Korean Patent Publication No. 10-1009565 (hereinafter referred to as "Prior Art 1") discloses a hydraulically operated conduit that selectively opens the upper and lower water levels by opening the upper or lower end of the conduit It is public.

However, in the prior art document 1, the second hydraulic cylinder 223 is additionally provided at the bottom of the water gate, and the bottom of the water gate is opened by rotating the lower end of the water gate through the second hydraulic cylinder 223. This is because the soil is ejected at the interval between the projecting portion 125 and the water gate When the cylinder rod 229 of the second hydraulic cylinder 223 is extended during the initial drive, the fixed shaft 114 and the rotation guide member 150, to which one end of the cylinder rod 229 is connected, The upper end portion of the rotation guide member 150 is rotated in the reverse direction to rotate the water at the time of initial driving as the center of rotation of the cylinder rod 219 of the rotation shaft 213 is connected to the support member 160, There arises a problem that the durability of the rotation guide member 150 is deteriorated due to a large amount of applied pressure.

Korean Patent Publication No. 10-0800564 (hereinafter referred to as Prior Art Document 2) discloses an articulated conduit which can lift the lower end of a watercraft to a height suitable for formation.

However, in the prior art document 2, as the load of the second cylinder 12 is reduced, the first elevator 31 connected to the load is lifted along the first post 21, The second elevator body 32 as well as the sluice gate must be elevated at the same time, so that the apparatus becomes complicated and maintenance becomes difficult.

On the other hand, the prior art document 1 and the preceding document 2 are hydraulic conduit doors provided with hydraulic cylinders on both sides of the watercourse. In this case, when the standing state is maintained for a long time, the pressure in the hydraulic system is lowered, (Locking device). In addition, since the locking device is locked only at the mounting position, the locking position can not be linearly controlled.

Therefore, it is necessary to prevent the water in the lower layer water from being stagnated and to prevent sand and foreign matter from accumulating on the bottom of the river or reservoir, and to simultaneously perform the two functions of conduction operation and locking operation Hydrological structures are required.

Prior Art 1: Korean Patent Publication No. 10-1009565 Prior Art 2: Korean Patent Publication No. 10-0800564

The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to provide a conduit gate capable of ascending and descending by opening the upper or lower end of a watercourse, In particular, the basic task is to provide a conduit gate that can move up and down the gate for opening and closing the lower layer water.

It is another object of the present invention to provide a structure capable of freely adjusting the open / close angle of a water gate by simultaneously performing two functions of a conduction operation for opening and closing a water gate and a locking operation for locking at a conduction position, It is another task.

In order to accomplish the above object, according to the present invention, there is provided a conduit gate capable of ascending and descending, comprising: a rectangle for shielding a discharge passage of a bank B in a gate installed in a bank B for desalinating or regulating water in a reservoir or a river; A hydrographic body (10) comprising a hydrographic shaft (12) located at the bottom of the hydrograph and extending outside the hydrograph; A first actuating part 20 connected to both ends of the water gate shaft 12 to transmit the driving force of the driving means 30 to conduct the water gate; And a second operation part 40 connected to both ends of the water gate shaft 12 so as to share a coaxial relationship with the first operation part 20 and to move up and down the water gate.

Alternatively, the first actuating part 20 may include a rail 22 formed on one side of the bank B, a screw shaft 24 formed on the rail and rotated by receiving a driving force transmitted from the driving means 30, A first support 26 hinged to the transfer 25 and one end hinged to the first support and a second end hinged to the first support so that the other end is connected to the hydrographic shaft 12, And a fixed second support (27).

Or a roller 251 rolling on the rail 22 is formed at the bottom of the transfer 25.

Alternatively, the drive means 30 may include a motor 31 or a manual actuator 32, a speed reducer 33 connected to an electric motor or a manual actuator, a drive gear box 34 connected to the speed reducer, and a transmission shaft 35 connected to the drive gear box. And a power transmitting portion including an operating gear box. The power generating portion is located at an upper portion of the bank, and the power transmitting portion is located on the same surface as the first operating portion 20 .

Alternatively, the operating gear box 36 may include a bevel gear set 361 formed at the end of the transmission shaft 35, a spur gear set 362 connected to the bevel gear set 361, And a shaft (363).

Or the second actuating part 40 includes a triangular link 41 having three vertexes and each vertex of the triangular link 41 is connected to the hydrodynamic axis 12, the first fixing bracket 42, (43) are hinged to each other.

Or the hinge connection is made through the through hole formed at the vertex of the triangular link, one of the three through holes is inserted into the hydration shaft 12, and the remaining through holes are respectively connected to the first fixing bracket 42 and the hydraulic cylinder 43, And is connected to a pin.

The exponent means 50 is attached to the side of the bank B and includes a lift hole H2 corresponding to the lift hole H1 at the bank And an exponent part 52 which is provided on the hydrologic shaft 12 so as to be in close contact with the plate 51 and which is raised and lowered together with the hydrological shaft to normally close the lift hole H2 of the plate .

In the present invention, the first and second actuating parts are configured to open the upper part of the hydrological main body when the water is being discharged by the water gate, It is possible to increase the amount of dissolved oxygen in the discharged water by discharging not only the upper water of the stored water but also the foreign matter deposited on the bottom surface including the lower water together to prevent contamination of the water.

Further, since the second actuating part is constituted by the triangular link and the hydraulic cylinder, the opening and closing of the water door for the lower layer water discharge can be realized by the upward / downward movement of the water gate, thereby reducing the load of opening and closing the water gate.

In addition, since the first actuating part is constructed of a screw shaft and a gear system, it is necessary to provide a separate anti-rotation device (locking device) for continuously maintaining the conductive state when the watertight door is opened There is an effect that the gate pad is made compact.

In addition, unlike a locking device which is locked only at a conventional installation position through the application of a screw shaft, locking is possible at any position, and the opening and closing angle of the door can be freely adjusted and maintained safely have.

1 is a perspective view showing an embodiment of a movable beam proposed by the present invention;
Fig. 2 is a detailed view for explaining the main constitution presented in the present invention.
Fig. 3 is a detailed view for explaining the first actuating part of the present invention
FIG. 4 is a cross-sectional view for explaining main components proposed in the present invention;
5 is a detailed view of A 'shown in Fig. 4
6 is a detailed view of B 'shown in Fig. 4
7 is a perspective view for explaining the exponent means proposed by the present invention.
8 is a cross-sectional view showing a state of the movable beam normally shown in the present invention
Fig. 9 is a cross-sectional view showing a half conduction state of the movable beam proposed by the present invention
10 is a cross-sectional view showing the elevating state of the movable beam proposed by the present invention

The term used in the present invention is a general term that is widely used at present. However, in some cases, there is a term selected arbitrarily by the applicant. In this case, the term used in the present invention It is necessary to understand the meaning.

Hereinafter, the technical structure of the present invention will be described in detail with reference to preferred embodiments shown in the accompanying drawings.

Here, it should be noted that the expressions related to the directions of up and down, left and right, right, left, and bottom are all described based on the drawings.

Referring to FIG. 1, the conduit according to the present invention is a water gate installed on a bank B for desalinating or regulating water in a reservoir or a river. The conduit has a rectangular shape for shielding the discharge passage of the bank B A hydrographic body (10) comprising a hydrographic shaft (12) located at the bottom of the hydrograph and extending outside the hydrograph; A first actuating part 20 connected to both ends of the water gate shaft 12 to transmit the driving force of the driving means 30 to conduct the water gate; And a second actuating part 40 connected to both ends of the hydrograph shaft 12 to share the coaxial with the first actuating part 20 and move up and down the hydrograph.

In this case, the height and the shape of the bank B are formed like waterways, and each bank is preferably fixedly installed at an interval so that the inner wall thereof comes into contact with the side face of the water gate main body 10, And the elevating and lowering holes H are formed so that they can be raised and lowered by the second actuating part 40.

2 and 6, the hydrological main body 10 can be opened and closed by opening and closing the upper part of the water channel of the bank while being conducted and standing by the first operating part 20 to be specifically described, And the bottom part of the water channel is opened and closed while being raised and lowered by the part 40 to discharge the foreign substances accumulated on the bottom surface including the lower layer water together.

For this purpose, the hydrology main body 10 includes a rectangular water gate 11 formed to be in close contact with a water channel, a hydrologic axis 12 extending to the outside of the hydrological gate located at the bottom of the hydrologic gate, A bottom surface exponent portion 15 formed on the outer periphery of the basin and closely adhered to the bottom of the basin and a side exponential portion 17 formed on the side of the basin and in close contact with the basin side.

Here, the structures existing on both sides of the first actuating part 20, the second actuating part 40, and the flange 13 are identical to each other with reference to the drawings, .

The hydr. Shaft 12 should be formed to have a length sufficient to allow the first actuating part 20 and the second actuating part 40 to be connected to each other. The flange 13 on which the means 50 is to be formed is formed with a distance L by the thickness of the inner wall of the bank.

To this end, the flanges 13 are formed as a pair, and the exponential means formed on the pair of flanges will be described in detail below.

2, 3, and 5, the first operation unit 20 is configured to open and close the upper part of the water channel of the bank while discharging the upper layer water while conducting and standing the water gate main body 10, A screw shaft 24 rotatably receiving a driving force transmitted from the driving means 30 and formed on an upper portion of the rail; A first support 26 connected to the transfer 25 and a second support 27 connected at one end to the first support and the other end connected to the water gate shaft 12, .

The rail 22 is configured to support the load of the water gate 11 transmitted through the first support so that the transfer 25 slidingly sliding along the rotation of the screw shaft can be stably slid. It is preferable that the roller 251 is provided at the bottom.

The screw shaft 24 is configured to rotate by the power transmitted by the operating gear box 36 to be linearly moved by the transfer gear 25. To this end, And the other side is supported by bearings (not shown) mounted on the stationary bracket 23.

The transfer 25 receives the rotational force of the screw shaft 24 and linearly moves and pushes the first support table 26. The screw 25 is screwed with the screw shaft 24 to thereby rotate the screw shaft 24, Lt; / RTI >

As described above, the roller 251 is provided at the bottom of the transfer 25 and rolls along the rail 22 to disperse the load transmitted to the bearings on both sides of the screw shaft 24 .

The first support 26 converts the linear force of the linear transfer 25 into a rotational force and transmits the linear force to the second support so as to conduct the hydrological main body through the second support. (Not shown), and the other end is hingedly connected to the second support table 27 by a common pin.

The second support table 27 is configured to rotate and transmit the hydrograph body by the rotational force transmitted through the first support table 26. The second support table 27 has one end hingedly connected to the other end of the first support table 26 by a common pin, And the other end is fixed to the hydrological shaft 12.

Specifically, the rotational force transmitted by the drive means 30 is converted into a linear motion by the screw shaft 24 and the transfer 25, and then is converted into a rotational motion to rotate the hydrograph body again so that the hydrograph body is turned .

Here, in the case of a conventional hydraulic power transmission structure, when the standing state is maintained for a long time, the hydraulic pressure inside the hydraulic system is lowered and the gate is naturally conducted, so that a separate anti-rotation device (locking device) The mechanical power transmission structure of the drive means 30 and the screw shaft 24 and the transfer unit 25 according to the present invention not only performs the locking function but also performs the water gate opening / Economic effect.

2 and 3, the driving means 30 is configured to transmit a rotational force to the screw shaft 24, and is composed of a power generating portion R and a power transmitting portion T. [

The power generating unit R is located above the bank for operating convenience of the driver and includes a speed reducer 33 connected to the motor 31 and / or the manual controller 32, the motor and / or the manual controller, A gear box 34 and a transmission shaft 35 connected to the drive gear box.

The power transmitting portion T is configured to simultaneously transmit a rotational force to a screw shaft 24 formed on both sides of the water gate by a driving shaft 35. The power transmitting portion includes a first operating portion including a screw shaft 24 20).

The power transmission unit T includes a bevel gear set 361 and a spur gear set 362. The power transmission unit T on either side of the power transmission unit T includes a transmission shaft A power bevel gear 3613 is formed at the end of the transmission shaft 35 so that the rotational force of the bevel gear 361 and the spur gear set 362 can be switched by 90 °.

The bevel gear set 361 includes a first bevel gear 3611 formed at a distal end of the screw shaft 24 and a second bevel gear 3611 formed at a distal end of the spur gear set 632 and meshed with the first bevel gear 3611. [ And a bevel gear 3612.

The spur gear set 362 includes a first spur gear 3621 having the second bevel gear 3612 formed therein and a second spur gear 3622 engaged with the first spur gear, 3622 are formed with a transmission shaft 363.

5 and 10, the second actuating part 40 is constituted by a triangular link and a hydraulic cylinder as a structure for realizing opening and closing of the water door for the lower layer water discharge through the water descending operation, The load of opening and closing the water gate is reduced, thereby improving the durability of the water gate.

To this end, the second operating portion 40 includes a triangular link 41 having three vertexes, and each vertex of the triangular link 41 is connected to the hydrostatic axis 12, the first fixing bracket 42, And are hinged to the cylinders 43 respectively.

The hinge connection is made through a through hole formed at the vertex of the triangular link, one of the three through holes is inserted into the hydr. Shaft 12, and the remaining through holes are respectively connected to the first fixing bracket 42 and the hydraulic cylinder 43 Respectively.

On the other hand, an exponent means 50 is further provided on the bank B side.

7, the indexing means 50 includes an elevation hole H1 formed in the bank, reflecting the elevation section of the hydrology shaft 12 during the ascending and descending of the floodgate 11 by the second actuating portion 40, A plate 51 attached to the side of the bank B and having a plate lift hole H2 corresponding to the lift hole H1 of the bank, And an exponent portion 52 which is provided on the hydrological shaft 12 so as to be closely contacted and is lifted and lowered together with the hydrological shaft to normally close the plate lift hole H2.

The exponent part 52 includes a band-shaped exponent rubber 521 attached to the plate 51 so as to be adhered to the plate 51. The exponent part 52 is lifted up and down together with the hydrological shaft in the exponential rubber 521, A sealing portion 522 symmetrically provided on the upper and lower sides of the structure corresponding to the lifting hole H2 and a lifting hole H3 of the lifting shaft 12 are formed to seal the belt- And a cover portion 523.

One side of the flange is formed to correspond to a part of the lift hole H2 of the plate and the other side of the flange 13 is formed on the side of the cover part 523 A part of the lift hole H3 is correspondingly formed and the exponent rubber 521 and the sealing portion 522 are positioned between the thicknesses D of the pair of flanges 13. [

The operating relationship of the conductive water can be ascended / descended according to the present invention as described above.

[At the time of discharging the upper layer water through the waterway conduction]

Referring to FIGS. 8 and 9, when the first operation unit 20 is in the closed state, the transfer 25 is located in the leftmost position in the bank B, About 75 [deg.]).

In this standing state, the transfer 25 is screwed into the screw shaft 24, the screw shaft 24 is engaged with the first bevel gear 3611 in the operating gear box 36, And the electric shafts are mechanically connected to the electric motor 31 and / or the manual actuator 32 through the drive gear box 34 and the speed reducer 33 State.

As a result, the screw shaft 24 can not be reversely rotated due to the mechanical connection state while maintaining the standing state (about 75), thereby performing the locking function by itself, It is not necessary to provide a separate conduction preventing device (locking device).

In the case of 1/2 conduction, it is necessary to operate the electric motor 31 and / or the manual operation device 32 so as to discharge the water only through the speed reducer 33 The horizontal rotation force is transmitted through the bevel gear in the drive gear box 34 by 90 degrees to the transmission shaft 35. [

The rotational force of the transmission shaft transmitted in this manner is transmitted to the first bevel gear 3611 and the second bevel gear 3612 of the one-side operating gear box 36, which are respectively present on both sides of the bank through the power bevel gear 3613 formed at the end of the transmission shaft, .

The rotational force transmitted to the first bevel gear rotates the screw shaft 24 and the rotational force transmitted to the second bevel gear is transmitted to the transmission shaft 363 via the spur gear set 362, The second bevel gear 3612 and the first bevel gear 3611 and the second bevel gear 3612 of the second screw gear 3612.

In this case, the screw shaft 24 on both sides is rotated, and the transfer 24 screwed to the screw shaft is linearly moved by the rotation of the screw shaft, that is, sliding to the right side. At this time, (251) slides along the rail (22).

The linear movement of the transfer 24 moves the first support 26 hinged to the upper portion of the transfer to the left and the first support 26 rotates the transfer upper portion and the second support 27 via the hinge connection, While the second support table 27 is pulled to the left side, the second support table 27 fixedly coupled to the water gate shaft 12 rotates clockwise, so that the water gate 11 is turned on.

Even in the case of 1/2 conduction, the mechanical coupling performs the locking function, so that the locking function is performed not only at 1/2 conduction but also at any position of conduction.

At this time, since the triangular link 41 having three vertexes is hingedly connected to the hydrographic shaft 12 by the second operation means, the hydrograph axis is rotated at the connection point of the triangular link, The rotation of the door is not affected at all.

Subsequently, when the transfer 24 is further moved to the right, the flood gate is in a fully conductive state, thereby reaching the fully open state of the water gate.

[At the time of discharging the lower layer water by lifting the water gate]

8 and 10, when the hydrological main body 10 is closed by the second actuating part 40, the hydraulic cylinder 43 is extended to the maximum extent in the bank B, 75 °).

In this standing state, the vertexes of the triangular link 41 having three vertexes are hinged to the hydromotor shaft 12, the first fixing bracket 42, and the hydraulic cylinder 43, respectively.

If the hydraulic cylinder 43 is retracted in the case of raising and lowering the water gate for discharging accumulated sediments on the bottom of the water gate, for example, in the case of ascending and descending 200 mm, the triangular link is rotated clockwise around the connection point of the first fixing bracket 42 , Through which the triangular link lifts the water gate clockwise through the connection point of the water gate shaft 12.

At this time, since the first supporting means 26 is hinged to the upper portion of the transfer 25 and the second supporting portion 27, the first actuating means 20 can move the transfer 25 in spite of the rotation of the triangular link, So that it is not affected at all by the connection of the upper and second support rods 27.

The elevating hole H1 of the bank and the elevating hole H2 of the bank provided for the elevating and lowering of the water gate are symmetrical with respect to the elevating and lowering holes H1 and H2 symmetrically So that it is in a normally closed state due to the sealing portion 522 provided therein.

In other words, when the water gate is lifted and lowered, the triangular link rotates and lifts the water gate shaft 12. The closure part 522 having symmetrical structures corresponding to the elevation holes H1 and H2, The elevating holes H1 and H2 are pierced by the upper shaft portion (the shaft portion formed on the upper side with respect to the water gate shaft), and the lower shaft portion (the shaft portion formed at the lower portion with respect to the water gate shaft, The elevating holes H1 and H2 can be hermetically sealed with each other so that the closing holes H1 and H2 can be closed.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention. Various modifications and variations will be possible without departing from the spirit of the invention. Therefore, the scope of the present invention should be construed as being covered by the scope of the appended claims, and technical scope within the scope of equivalents thereof should be construed as being included in the scope of the present invention.

10: hydrologic body 20: first operating portion
30: driving means 40: second operating portion
50: exponent means B: embankment
11: Hydrology 12: Hydrological axis
13: flange 15: bottom face portion
17: lateral side exponent part 22: rail
23: Fixing bracket 24: Screw shaft
25: transfer 251: roller
26: first support frame 27: second support frame
31: electric motor 32: manual actuator
33: Reduction gear 34: Drive gear box
35: transmission shaft 36: operating gear box
361: Bevel gear set 362: Spur gear set
363: transmission shaft 41: triangular link
42: first fixing bracket 43: hydraulic cylinder
45: second fixing bracket 51: plate
521: Exponential rubber 522: Sealing part
523: Cover portion R: Power generating portion
T: Power transmission part D: Thickness between flanges
L: thickness of the inner wall of the bank H:

Claims

In a water gate installed on a bank (B) for desalinating or regulating water in a reservoir or river,
A rectangular water gate 11 for shielding the discharge passage of the bank B, a hydrological main body 10 including a hydrographic shaft 12 located at the bottom of the hydrograph and extended to the outside of the hydrograph;
A first actuating part 20 connected to both ends of the water gate shaft 12 to transmit the driving force of the driving means 30 to conduct the water gate;
And a second operation part (40) connected to both ends of the water gate shaft (12) to move up and down the water gate,
The first actuating part 20 includes a rail 22 formed on one side of the bank B,
A screw shaft 24 formed on the rail and rotated by receiving a driving force transmitted from the driving means 30,
A transfer 25 which slides along the screw shaft 24 on the screw shaft 24,
A first support 26 hinged to the transfer 25,
And a second support (27) hingedly connected at one end to the first support and the other end fixed to the hydrangea shaft (12).

delete

The method according to claim 1,
And a roller (251) rolling on the rail (22) is formed at the bottom of the transfer (25).

The method according to claim 1,
The drive means 30 includes an electric motor 31 or a manual actuator 32, a speed reducer 33 connected to an electric motor or a manual actuator, a drive gear box 34 connected to the speed reducer and a transmission shaft 35 connected to the drive gear box And a power transmitting portion including an operating gear box,
The power generating portion is located at an upper portion of the bank,
Wherein the power transmission unit is located on the same plane as the first operation unit.

The method of claim 4,
The operating gear box 36 includes a bevel gear set 361 formed at the end of the transmission shaft 35,
A spur gear set 362 connected to the bevel gear set 361,
And a transmission shaft (363) connected to the spur gear set (362).

The method according to claim 1,
The second actuating part 40 includes a triangular link 41 having three vertexes,
Wherein each vertex of the triangular link (41) is hinged to the hydrologic shaft (12), the first fixing bracket (42), and the hydraulic cylinder (43).

The method of claim 6,
The hinge connection is made through a through hole formed at the vertex of the triangular link,
Wherein one of the three through holes is inserted into the water gate shaft (12), and the remaining through holes are respectively connected to the first fixing bracket (42) and the hydraulic cylinder (43) by pins.

The method according to claim 1,
An exponent means (50) is further provided on the side of the bank (B)
The indexing means 50 includes a plate 51 attached to a side of the bank B and having a lift hole H2 corresponding to the lift hole H1 of the bank,
And an exponent part (52) provided on the water gate shaft (12) so as to be in close contact with the plate (51) and vertically closing the lift hole (H2) of the plate while being lifted and lowered together with the water gate shaft Conduction gates.