Expansion type cut-off door for drainage engineering

Abstract

The invention relates to the field of water supply and drainage, in particular to an expansion type cut-off door for drainage engineering. The rotary cutting device comprises a base, a rotary cutting flashboard and a power mechanism, wherein the base comprises a fixed seat and a movable ring; the fixed seat is fixedly mounted at the pipe orifice, the movable ring is rotatably mounted on the fixed seat, an annular sealing face is arranged on the side face, away from the fixed seat, of the movable ring, a partition plate is arranged on the inner wall of the water passing hole, and a sealing rubber ring is arranged on the annular sealing face. In the switching-on process of the rotary-cut flashboard, in cooperation with rotation of the movable ring, sundries at the bottom of the movable ring can be conveyed upwards under the action of the partition plate, excessive sundries are prevented from being accumulated at the bottom, the rotary-cut flashboard can conveniently and effectively cut the sundries, the switching-on reliability is improved, and the service life of the rotary-cut flashboard is prolonged. And meanwhile, the sealing rubber ring is shielded by the check block in the gate opening state, the sealing rubber ring does not make direct contact with the water body, the rubber ring is prevented from being aged and corroded, and the service life of the sealing rubber ring is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of water supply and drainage, and particularly to an expansion type cut-off gate for drainage engineering. Background Art

[0002] In existing drainage engineering, in addition to using gate plate type water gates or power flap gates to control the opening and closing of the pipe orifice flow channels, expansion type cut-off gates are also used to control the pipe orifice flow channels. The expansion type cut-off gate is a new type of drainage device, mainly used in fields such as urban drainage network overflow pollution control, prevention of river water backflow, initial rainwater interception, and combined sewer network transformation. The expansion type cut-off gate mainly includes a base and a cut-off gate plate. The base is installed at the pipe orifice, and the left and right sides of the cut-off gate plate are rotatably connected to the base. Compared with gate plate type water gates and power flap gates, the expansion type cut-off gate has a compact and small structure, does not require a large installation space and a high installation height, and when the expansion type cut-off gate closes the pipe orifice, its cut-off gate plate rotates to be tangent to the edge of the base, and can cut off dead branches and impurities in the water body, and will not cause equipment jamming due to impurities in the water.

[0003] During the actual use of the existing cut-off gate, as the cut-off gate plate rotates, the sundries in the water body are pushed by the cut-off gate plate and concentrated at the lower part of the pipe orifice and are cut off before the cut-off gate plate closes, resulting in excessive accumulation of sundries, difficult cutting, and greater damage to the cut-off gate plate; at the same time, due to the special cutting function of the expansion type cut-off gate, it is often arranged to be used in relatively harsh environments, and its upper sealing structure is severely corroded, and because the cut-off gate plate closes tangentially, the sealing ring is easily worn, affecting the sealing performance, and further affecting the blocking effect on the pipe orifice flow channel.

[0004] The information disclosed in the background art part of the present invention is only intended to deepen the understanding of the general background art of the present invention, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0005] According to the deficiencies of the prior art, one of the purposes of the present invention is to facilitate the effective cutting of dead branches and other sundries in the water body by the gate plate and improve the reliability of closing the gate.

[0006] Another purpose of the present invention is to improve the sealing performance of the expansion type cut-off gate.

[0007] An expansion type cut-off gate for drainage engineering of the present invention adopts the following technical solution: including a base, a rotary cutting gate plate and a power mechanism; The base includes a fixed seat and a movable ring; the fixed seat is fixedly installed at the water passing opening or pipe opening of the well wall in the drainage project, and a central through hole communicating with the water passing opening or pipe opening is provided on the fixed seat; the movable ring is rotatably installed on the fixed seat and has a water passing hole in its center, and the water passing hole is coaxially communicated with the central through hole of the fixed seat; an outwardly expanding annular sealing surface communicating with the water passing hole is provided on the side of the movable ring away from the fixed seat, and a plurality of circumferentially evenly distributed partition plates are provided on the inner wall of the water passing hole; The left and right sides of the rotary cutting gate are respectively rotatably connected to the left and right sides of the fixed seat to close or open the water passing hole. During the process of the rotary cutting gate closing the water passing hole, it is tangent to the annular sealing surface and forms a seal with the sealing surface after closing the water passing hole; The power mechanism is used to drive the rotary cutting gate to rotate around its rotation center to realize opening and closing of the gate.

[0008] Optionally, the partition plates are inclined and the inclination direction is the same as the rotation direction of the movable ring.

[0009] Optionally, mounting cantilevers are provided on both the left and right sides of the fixed seat, connecting arms are provided on both the left and right sides of the rotary cutting gate, and the ends of the connecting arms are rotatably connected to the ends of the mounting cantilevers.

[0010] Optionally, the power mechanism includes a power push rod which can be telescopic. The fixed end of the power push rod is hingedly connected to the top of the fixed seat, and the output end of the power push rod is hingedly connected to the end of the connecting arm, and this hinge point is on one side of the hinge point of the connecting arm and the mounting cantilever.

[0011] Optionally, the working surface of the rotary cutting gate is spherical and the shape of the annular sealing surface is adapted to it; an annular sealing cavity and a control cavity are provided at the position corresponding to the annular sealing surface on the movable ring; the sealing cavity penetrates the annular sealing surface, a sealing rubber ring is provided in the sealing cavity, and the sealing rubber ring can slide along the depth direction of the sealing cavity. A plurality of stoppers are provided on the movable ring, and the stoppers can slide along the width direction of the sealing cavity to block or expose the sealing rubber ring; The control cavity is located on the periphery of the sealing cavity. An elastic bladder wall is provided on the side of the control cavity close to the annular sealing surface. The elastic bladder wall and the side of the control cavity away from the annular sealing surface enclose a control chamber. The control chamber is communicated with the sealing cavity, and hydraulic oil is filled in the control chamber and the sealing cavity; A plurality of mounting notches are provided on the annular sealing surface, the mounting notches are communicated with the control cavity, and a plurality of pushing blocks are provided in the mounting notches. The pushing blocks can slide along the depth direction of the control cavity and abut against the elastic bladder wall. The pushing blocks correspond to the stoppers one by one and act on the stoppers. When the pushing blocks move towards the inside of the control cavity, they drive the stoppers to move towards the direction close to the control cavity to expose the sealing rubber ring.

[0012] Optionally, the sealing rubber ring is hollow inside and has an open side close to the bottom of the sealing cavity. The middle part of the side wall of the sealing rubber ring close to the annular sealing surface is a thin-wall structure.

[0013] Optionally, sliding protrusions are provided on the movable ring, and guiding sliding grooves are provided on both sides of the stopper, and the sliding protrusions cooperate with the guiding sliding grooves.

[0014] Optionally, a guiding inclined surface is provided on one side of the pushing block close to the center of the movable ring, a connecting sliding groove is provided on the guiding inclined surface, and one end of the stopper is provided with a connecting sliding block, and the connecting sliding block is slidably arranged in the connecting sliding groove.

[0015] Optionally, the pushing block includes a guiding part and a pushing part, the guiding part is adapted to the installation notch and is slidably arranged in the installation notch, and the pushing part is arranged on the side of the guiding part away from the elastic capsule wall; The outer peripheral surface of the pushing part at least includes a first pressing surface, a second pressing surface and a pushing surface. The first pressing surface is located on the side away from the center of the movable ring, and the first pressing surface is inclined from the end connected to the guiding part to the other end towards the center of the movable ring. The pushing surface is located on one side of the guiding part and is coplanar with the corresponding side surface of the guiding part. The second pressing surface is located on the opposite side of the pushing surface, and the second pressing surface is relatively inclined with the corresponding side surface of the guiding part, and the inclination direction is opposite to the rotation direction of the movable ring.

[0016] Optionally, a driving motor is provided on the fixed seat, a driving gear is provided at the output end of the driving motor, a toothed ring is provided on the movable ring, and the toothed ring meshes with the driving gear.

[0017] The beneficial effects of the present invention are as follows: An expansion type cut-off gate for a drainage project of the present invention sets the base as a split structure including a fixed seat and a rotating ring, and a partition plate is provided on the inner wall of the water passing hole of the rotating ring. During the closing process of the rotary cutting gate, with the rotation of the movable ring, the sundries at the bottom of the movable ring can be transported upward under the action of the partition plate, avoiding excessive accumulation of sundries at the bottom. The cutting of the sundries by the rotary cutting gate can be completed mostly in the middle and upper parts, which can not only facilitate the effective cutting of the sundries by the rotary cutting gate, improve the reliability of closing, but also avoid excessive rubbing and extrusion of the sundries and the annular sealing surface during cutting, extend the service life of the annular sealing surface, and improve the sealing effect.

[0018] Furthermore, through the arrangement of the pushing block and the stopper, the sealing rubber ring at the annular sealing surface is blocked by the stopper in the open gate state, and the sealing rubber ring does not directly contact sewage or rainwater, etc., preventing the rubber ring from aging and corroding and extending the service life of the sealing rubber ring. In the closed gate state, the stopper cancels the shielding of the sealing rubber ring, and the sealing rubber ring is squeezed and sealed with the rotary cutting gate, improving the sealing reliability. At the same time, when the rotary cutting gate is at the position of cutting sundries or at the position where no cutting is performed, the sealing rubber ring is blocked, and after the cutting is completed, the sealing rubber ring pops out, preventing the cutting from damaging the sealing rubber ring and further extending the service life of the sealing rubber ring.

[0019] Furthermore, by specially setting the structure of the pushing block, during the closing process of the rotary cutting gate, through contact with different surfaces of the pushing block, while realizing the retraction of the pushing block to release the sealing ring, it can also drive the movable ring to rotate, eliminating the need for additional power to drive the rotation of the movable ring, improving energy utilization efficiency and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of an expansion type cut-off gate for a drainage project according to the present invention; Figure 2 It is a front view of an expansion type cut-off gate for a drainage project according to the present invention; Figure 3 It is Figure 2 the sectional view taken along line B-B in Figure 4 It is Figure 3 the enlarged view at position A in Figure 5 It is a schematic diagram of the closed state of an expansion type cut-off gate for a drainage project according to the present invention; Figure 6 It is Figure 5 the sectional view in the Figure 7 It is Figure 6 the enlarged view at position B in Figure 8 It is a schematic diagram of the structure of the pushing block in the present invention; Figure 9 It is a schematic diagram of the structure of the stop block in the present invention; Figure 10 It is a sectional perspective view of the open state of an expansion type cut-off gate for a drainage project according to the present invention; Figure 11 It is Figure 10 the enlarged view at position C in

[0022] In the figure: 100, fixed seat; 110, limit ring; 120, mounting cantilever; 200, movable ring; 201, water passing hole; 202, annular sealing surface; 203, sealing cavity; 204, control cavity; 205, elastic capsule wall; 206, control room; 207, sliding projection; 208, mounting notch; 209, partition board; 210. Sealing rubber ring; 220. Stopper; 221. Guide chute; 222. Connecting slider; 230. Pushing block; 231. Connecting chute; 232. First extrusion surface; 233. Second extrusion surface; 234. Pushing surface.

[0023] 300. Rotary cutting gate; 310. Connecting arm; 400. Power push rod. Specific implementation manner

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] As Figures 1 to 11 shown, an expansion type cut-off gate for drainage engineering provided by an embodiment of the present invention (hereinafter referred to as the expansion type cut-off gate) includes a base, a rotary cutting gate 300 and a power mechanism. The base includes a fixed seat 100 and a movable ring 200.

[0026] The fixed seat 100 is fixedly installed at the water passing opening or pipe orifice of the well wall of the drainage project. A central through hole communicating with the water passing opening or pipe orifice is provided on the fixed seat 100; specifically, a plurality of through holes are provided on the fixed seat 100. During installation, connecting members such as bolts are inserted through the through holes to connect the fixed seat 100 with the well wall or pipe orifice.

[0027] The movable ring 200 is rotatably installed on the fixed seat 100 and has a water passing hole 201 in its center. The water passing hole 201 is coaxially communicated with the central through hole of the fixed seat 100; an outwardly expanding annular sealing surface 202 (refer to Figure 10 ) communicating with the water passing hole 201 is provided on the side of the movable ring 200 away from the fixed seat 100. A plurality of circumferentially evenly distributed partition plates 209 are provided on the inner wall of the water passing hole 201; to facilitate the installation of the movable ring 200, a limiting ring 110 is provided on one side of the fixed seat 100. The movable ring 200 is coaxial with the limiting ring 110 and is rotatably connected to the limiting ring 110.

[0028] The left and right sides of the rotary cutting gate 300 are respectively rotatably connected to the left and right sides of the fixed seat 100 to close or open the water passing hole 201. During the process of the rotary cutting gate 300 closing the water passing hole 201, it is tangent to the annular sealing surface 202, and forms a seal with the sealing surface after closing the water passing hole 201.

[0029] The power mechanism is used to drive the rotary cutting gate 300 to rotate around its rotation center to realize opening and closing of the gate.

[0030] It can be understood that in the cutting gate solution of the prior art, the base is an integral structure, and the inner wall of the flow-through channel for water is basically a smooth structure. During the closing process of the rotary cutting gate 300, sundries such as dead branches in the fluid will be pushed to the bottom of the base and cut off before closing. However, when too many sundries accumulate at the bottom, it is difficult for the rotary cutting gate 300 to cut, which is likely to damage the rotary cutting gate 300. Moreover, when a large number of sundries are cut at the bottom, they are easily rubbed against the annular sealing surface 202, affecting the service life of the annular sealing surface 202 and reducing the sealing effect.

[0031] The solution of this embodiment sets the base as a split structure including a fixed seat 100 and a movable ring 200. A partition plate 209 is arranged on the inner wall of the water passing hole 201 of the movable ring 200. During the closing process of the rotary cutting gate 300, with the rotation of the movable ring 200, the sundries at the bottom of the movable ring 200 can be transported upward under the action of the partition plate 209, avoiding excessive accumulation of sundries at the bottom. The cutting of the sundries by the rotary cutting gate 300 can be mainly completed in the middle and upper parts. This not only facilitates the effective cutting of the sundries by the rotary cutting gate 300, but also avoids excessive rubbing of the sundries against the annular sealing surface 202, prolonging the service life of the annular sealing surface 202.

[0032] Further, for the installation of the rotary cutting gate 300, in the preferred embodiment given by the present invention, installation cantilevers 120 are arranged on both the left and right sides of the fixed seat 100, and connecting arms 310 are arranged on both the left and right sides of the rotary cutting gate 300. The end of the connecting arm 310 is rotatably connected to the end of the installation cantilever 120.

[0033] In one of the embodiments, the power mechanism includes a power push rod 400 which can be telescopic. The fixed end of the power push rod 400 is hinged to the top of the fixed seat 100, and the output end of the power push rod 400 is hinged to the end of the connecting arm 310, and this hinge point is located on one side of the hinge point of the connecting arm 310 and the installation cantilever 120. When the power push rod 400 shortens, it drives the rotary cutting gate 300 to rotate and close towards the annular sealing surface 202. When the power push rod 400 extends, it drives the rotary cutting gate 300 to rotate upward to open the gate. Specifically, the connecting arm 310 is L-shaped. The hinge point of the connecting arm 310 and the installation cantilever 120 is located at the end where the cross bar and the vertical bar of the connecting arm 310 are connected, and the hinge point of the power push rod 400 and the connecting arm 310 is located at the overhanging end of the cross bar of the connecting arm 310. The power push rod 400 can adopt a hydraulic rod, a pneumatic rod or an electric push rod and other power elements that can achieve the same function.

[0034] In other embodiments, the power mechanism can also be set as a power motor. The power motor is arranged on the installation cantilever 120 and its output end is connected to the connecting arm 310, thereby driving the connecting arm 310 to rotate.

[0035] In a further embodiment, the partition plate 209 is inclined and the inclination direction is consistent with the rotation direction of the movable ring 200. The partition plate 209 is set to an inclined structure so that the partition plate 209 and the inner peripheral wall of the water hole 201 form a triangular bearing area, thereby improving the reliability of the partition plate 209 in carrying debris. At the same time, when the movable ring 200 rotates, the debris can be lifted to a higher height through the partition plate 209, thereby reducing the accumulation of debris at the bottom and facilitating cutting.

[0036] In order to realize the rotation of the movable ring 200, in one embodiment, a driving motor (not shown in the diagram) can be arranged on the fixed seat 100, and a driving gear is arranged at the output end of the driving motor. A ring gear is arranged on the movable ring 200, and the ring gear is meshed with the driving gear. The driving motor drives the driving gear to rotate, and the movable ring 200 is driven to rotate through the meshing of the driving gear and the ring gear.

[0037] In a further embodiment, the working surface of the rotary cutting gate 300 (referring to the surface that blocks the water hole 201 when the gate is closed) is spherical, and the shape of the annular sealing surface 202 is adapted thereto; an annular sealing cavity 203 and a control cavity 204 are provided on the movable ring 200 at a position corresponding to the annular sealing surface 202; the sealing cavity 203 passes through the annular sealing surface 202, and a sealing rubber ring 210 is provided in the sealing cavity 203, and the sealing rubber ring 210 can slide along the depth direction of the sealing cavity 203 (the depth direction is a direction perpendicular to the annular sealing surface 202), and a plurality of blocks 220 are provided on the movable ring 200, and the blocks 220 can slide along the width direction of the sealing cavity 203 to cover or expose the sealing rubber ring 210 (the width direction refers to a direction perpendicular to the depth direction).

[0038] The control chamber 204 is located at the periphery of the sealing chamber 203 (along the radial direction of the movable ring 200, the side close to the center is the inside, and the opposite is the outside). An elastic bag wall 205 is provided on the side of the control chamber 204 close to the annular sealing surface 202. The elastic bag wall 205 and the side of the control chamber 204 facing away from the annular sealing surface 202 enclose a control chamber 206. The control chamber 206 is connected to the sealing chamber 203, and the control chamber 206 and the sealing chamber 203 are filled with hydraulic oil.

[0039] A plurality of mounting notches 208 are provided on the annular sealing surface 202. The mounting notches 208 communicate with the control cavity 204. A number of pushing blocks 230 are arranged in the mounting notches 208. The pushing blocks 230 can slide along the depth direction of the control cavity 204. The pushing blocks 230 are in contact with the elastic bladder wall 205. The pushing blocks 230 correspond to the stoppers 220 one by one and act on the stoppers 220. When the pushing blocks 230 move towards the inside of the control cavity 204, the stoppers 220 are driven to move towards the control cavity 204 to expose the sealing rubber ring 210. It can be understood that in the initial state, the pushing blocks 230 are at the outer extreme position under the action of the elastic bladder wall 205 and protrude from the annular sealing surface 202, and the stoppers 220 block the sealing rubber ring 210; when the rotary cutting gate 300 is closed, the rotary cutting gate 300 gradually contacts and pushes the pushing blocks 230, causing the pushing blocks 230 to move towards the inside of the control cavity 204. At the same time, when the pushing blocks 230 move towards the inside of the control cavity 204, the pushing blocks 230 squeeze the elastic bladder wall 205, the volume of the control chamber 206 decreases, and the hydraulic oil in the control chamber 206 flows into the sealing cavity 203, pushing the sealing rubber ring 210 to move outwards. After the sealing rubber ring 210 moves outwards, it abuts against the rotary cutting gate 300, improving the sealing performance.

[0040] Furthermore, the inside of the sealing rubber ring 210 is hollow and the side close to the bottom of the sealing cavity 203 is open. The middle part of the side wall of the sealing rubber ring 210 close to the annular sealing surface 202 is a thin-wall structure. The thin-wall structure enables the position of the sealing rubber ring 210 to deform and protrude appropriately, so that it can be squeezed more tightly with the rotary cutting gate 300, further improving the sealing reliability between it and the rotary cutting gate 300.

[0041] It can be understood that when the expandable cut-off door of the present invention is in the open gate state, the pushing blocks 230 protrude from the movable ring 200, the stoppers 220 block the sealing rubber ring 210, and the sealing rubber ring 210 is not in direct contact with fluids such as sewage or rainwater, preventing the sealing rubber ring 210 from aging and corroding, improving the sealing effect of the sealing rubber ring 210, and extending the service life of the sealing rubber ring 210; when closing, refer to Figure 3In the shown direction, the rotary cutting gate 300 rotates counterclockwise. During the rotation of the rotary cutting gate 300, it gradually becomes tangent to the annular sealing surface 202 and squeezes the pushing block 230, causing the pushing block 230 to move inward into the control chamber 204 and squeeze the elastic bladder wall 205. The volume of the control chamber 206 decreases, and the hydraulic oil in the control chamber 206 flows into the sealing chamber 203. At the same time, the pushing block 230 drives the stopper 220 to move towards the control chamber 204, and the position of the sealing rubber ring 210 blocked by the moving stopper 220 is exposed, that is, the position where the rotary cutting gate 300 cuts debris and the uncut position. The sealing rubber ring 210 is in a blocked state. After the rotary cutting gate 300 passes, the sealing rubber ring 210 is exposed to prevent the cutting from damaging the sealing rubber ring 210. After the rotary cutting gate 300 is fully closed, the rotary cutting gate 300 contacts all the pushing blocks 230, and all the stoppers 220 cancel the blocking of the sealing rubber ring 210. Under the action of the hydraulic oil, the sealing rubber ring 210 moves towards the annular sealing surface 202 and then squeezes and seals with the rotary cutting gate 300.

[0042] When the rotary cutting gate 300 returns from the closed state to the open state and resets, the rotary cutting gate 300 gradually disengages from each pushing block 230. After the rotary cutting gate 300 disengages from the pushing block 230, the pushing block 230 resets under the action of the elastic bladder wall 205, the hydraulic oil flows back to the control chamber 206, the sealing rubber ring 210 resets, and at the same time, the pushing block 230 drives the stopper 220 to reset and re-block the sealing rubber ring 210 to protect the sealing rubber ring 210.

[0043] Further, in order to enable the pushing block 230 to drive the stopper 220 to move, sliding protrusions 207 are provided on the movable ring 200, and guiding chute grooves 221 are provided on both sides of the stopper 220. The sliding protrusions 207 cooperate with the guiding chute grooves 221 to guide the moving direction of the stopper 220.

[0044] A guiding inclined surface is provided on the side of the pushing block 230 close to the center of the movable ring 200, a connecting chute groove 231 is provided on the guiding inclined surface, and a connecting slider 222 is provided at one end of the stopper 220. The connecting slider 222 is slidably arranged in the connecting chute groove 231.

[0045] Based on the embodiment with the pushing block 230 provided, the present invention provides the following preferred embodiments to realize the rotation of the movable ring 200 to save power resources. Specifically as follows: The pushing block 230 includes a guiding part and a pushing part. The guiding part is adapted to the mounting slot opening 208 and is slidably arranged in the mounting slot opening 208, and the pushing part is arranged on the side of the guiding part away from the elastic bladder wall 205.

[0046] The outer peripheral surface of the pushing portion at least includes a first extrusion surface 232, a second extrusion surface 233, and a pushing surface 234. The first extrusion surface 232 is located on the side away from the center of the movable ring 200, and the first extrusion surface 232 inclines from the end connected to the guiding portion to the other end in the direction of the center of the movable ring 200. With such a setting, when the first extrusion surface 232 is pushed by the rotary cutting gate 300, the pushing block 230 can be moved along the control cavity 204; the pushing surface 234 is located on one side of the guiding portion and is coplanar with the corresponding side surface of the guiding portion. With such a setting, when the pushing surface 234 is pushed by the rotary cutting gate 300, the movable ring 200 can be rotated in a set direction. The second extrusion surface 233 is located on the opposite side of the pushing surface 234. The second extrusion surface 233 is inclined relative to the corresponding side surface of the guiding portion, and the inclination direction is opposite to the rotation direction of the movable ring 200. With such a setting, when the rotary cutting gate 300 contacts the second extrusion surface 233, the pushing block 230 can be moved into the control cavity 204 without causing the movable ring 200 to rotate in the reverse direction.

[0047] Referring to Figure 8 As shown, the guiding portion of the pushing block 230 is a rectangular structure as a whole. The pushing portion is arranged on one side of the guiding portion and is a frustum of a pyramid as a whole. The connecting chute 231 is arranged at the junction of the guiding portion and the pushing portion.

[0048] Combined with the above embodiments, the working principle and process of the present invention are as follows: When the expandable cutting gate of the present invention is in the open gate state, the fluid flows through the base. The pushing block 230 extends out of the movable ring 200, and the stop block 220 blocks the sealing rubber ring 210. The sealing rubber ring 210 does not directly contact fluids such as sewage or rainwater, preventing the sealing rubber ring 210 from aging and corroding, improving the sealing effect of the sealing rubber ring 210, and extending the service life of the sealing rubber ring 210.

[0049] When closing the gate, referring to Figure 3In the shown direction, the power push rod 400 contracts and drives the rotary cutting gate 300 to rotate counterclockwise. During the rotation of the rotary cutting gate 300, it gradually becomes tangent to the annular sealing surface 202 and gradually squeezes the pushing block 230 from top to bottom. At the initial stage of the closing of the rotary cutting gate 300, it contacts the first squeezing surface 232 of the uppermost pushing block 230 and causes the pushing block 230 to move inward into the control cavity 204. The inward-moving pushing block 230 squeezes the elastic bladder wall 205, reducing the volume of the control chamber 206. The hydraulic oil in the control chamber 206 flows into the sealing cavity 203. At the same time, the pushing block 230 drives the stop block 220 to move towards the control cavity 204, and the position of the sealing rubber ring 210 blocked by the moving stop block 220 is exposed; as the rotary cutting gate 300 continues to close, the left side of the rotary cutting gate 300 gradually squeezes the pushing surface 234 of the corresponding pushing block 230, thereby driving the movable ring 200 to rotate and transporting the sundries pushed to the bottom upward, facilitating the rotary cutting gate 300 to cut the sundries. At the same time, the right side of the rotary cutting gate 300 contacts the second squeezing surface 233 of the corresponding pushing block 230 on the right side, so that the corresponding pushing block 230 can still move into the control cavity 204 without causing the movable ring 200 to rotate in the reverse direction; after the rotary cutting gate 300 is closed in place, the rotary cutting gate 300 contacts all the pushing blocks 230, and all the pushing blocks 230 enter the interior of the control cavity 204. All the stop blocks 220 cancel the shielding of the sealing rubber ring 210. Under the action of the hydraulic oil, the sealing rubber ring 210 moves towards the annular sealing surface 202 and is squeezed and sealed with the rotary cutting gate 300.

[0050] When opening the gate again, the power push rod 400 extends and drives the rotary cutting gate 300 to rotate clockwise. The rotary cutting gate 300 gradually disengages from each pushing block 230. After the rotary cutting gate 300 disengages from the pushing block 230, the pushing block 230 resets under the action of the elastic bladder wall 205. The hydraulic oil flows back to the control chamber 206, the sealing rubber ring 210 resets, and at the same time, the pushing block 230 drives the stop block 220 to reset, covering the sealing rubber ring 210 again to protect the sealing rubber ring 210.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An expansion type cut-off door for drainage engineering, characterized in that, It includes a base, a rotary cutting gate and a power mechanism; The base includes a fixed seat and a movable ring; the fixed seat is fixedly installed at the water passing opening or pipe opening of the well wall in the drainage project, and a central through hole communicating with the water passing opening or pipe opening is provided on the fixed seat; the movable ring is rotatably installed on the fixed seat and has a water passing hole in its center, and the water passing hole is coaxially communicated with the central through hole of the fixed seat; an outward-expanded annular sealing surface communicating with the water passing hole is provided on the side of the movable ring away from the fixed seat, and a plurality of circumferentially evenly distributed partition plates are provided on the inner wall of the water passing hole; The left and right sides of the rotary cutting gate are respectively rotatably connected to the left and right sides of the fixed seat to close or open the water passing hole. During the process of the rotary cutting gate closing the water passing hole, it is tangent to the annular sealing surface, and a seal is formed with the sealing surface after closing the water passing hole; The power mechanism is used to drive the rotary cutting gate to rotate around its rotation center to realize opening and closing of the gate.

2. The expandable cut-off door for drainage engineering according to claim 1, wherein The partition plates are inclined and the inclination direction is the same as the rotation direction of the movable ring.

3. An expansion type cut-off door for a drainage project according to claim 1, characterized in that, Installation cantilevers are provided on both the left and right sides of the fixed seat, connecting arms are provided on both the left and right sides of the rotary cutting gate, and the ends of the connecting arms are rotatably connected to the ends of the installation cantilevers.

4. The expandable cut-off door for a drainage project according to claim 3, characterized in that, The power mechanism includes a power push rod which can be telescopic. The fixed end of the power push rod is hinged to the top of the fixed seat, and the output end of the power push rod is hinged to the end of the connecting arm, and this hinge point is located on one side of the hinge point of the connecting arm and the installation cantilever.

5. The expansion type cutting door for a drainage project according to claim 1, characterized in that, The working surface of the rotary cutting gate is spherical and the shape of the annular sealing surface is adapted to it; an annular sealing cavity and a control cavity are provided at the position corresponding to the annular sealing surface on the movable ring; the sealing cavity penetrates the annular sealing surface, a sealing rubber ring is provided in the sealing cavity, and the sealing rubber ring can slide along the depth direction of the sealing cavity. A plurality of stoppers are provided on the movable ring, and the stoppers can slide along the width direction of the sealing cavity to block or expose the sealing rubber ring; The control cavity is located on the periphery of the sealing cavity. An elastic bladder wall is provided on one side of the control cavity close to the annular sealing surface. The elastic bladder wall and the side of the control cavity away from the annular sealing surface enclose a control chamber. The control chamber is communicated with the sealing cavity, and hydraulic oil is filled in the control chamber and the sealing cavity; A plurality of installation notches are provided on the annular sealing surface, the installation notches communicate with the control cavity, and a plurality of pushing blocks are provided in the installation notches. The pushing blocks can slide along the depth direction of the control cavity and abut against the elastic bladder wall. The pushing blocks correspond to the stoppers one by one and act on the stoppers. When the pushing blocks move towards the inside of the control cavity, they drive the stoppers to move towards the direction close to the control cavity to expose the sealing rubber ring.

6. The expandable cut-off door for drainage engineering according to claim 5, characterized in that, The sealing rubber ring is hollow inside and has an open side close to the bottom of the sealing cavity. The middle part of the side wall of the sealing rubber ring close to the annular sealing surface is a thin-wall structure.

7. The expansion type cut-off door for a drainage project according to claim 5, characterized in that, Sliding protrusions are provided on the movable ring, and guiding chutes are provided on both sides of the stopper, and the sliding protrusions cooperate with the guiding chutes.

8. An expandable cut-off door for a drainage project according to claim 5, characterized in that, A guiding inclined surface is provided on one side of the pushing block close to the center of the movable ring, a connecting chute is provided on the guiding inclined surface, and a connecting slider is provided at one end of the stopper, and the connecting slider is slidably arranged in the connecting chute.

9. An expansion type cut-off door for a drainage project according to claim 5, characterized in that, The pushing block includes a guiding part and a pushing part. The guiding part is adapted to the installation notch and is slidably arranged in the installation notch, and the pushing part is arranged on the side of the guiding part away from the elastic bladder wall; The outer peripheral surface of the pushing part at least includes a first pressing surface, a second pressing surface and a pushing surface. The first pressing surface is located on the side away from the center of the movable ring, and the first pressing surface inclines from the end connected to the guiding part to the other end towards the center of the movable ring. The pushing surface is located on one side of the guiding part and is coplanar with the corresponding side surface of the guiding part. The second pressing surface is located on the opposite side of the pushing surface. The second pressing surface is inclined relative to the corresponding side surface of the guiding part, and the inclination direction is opposite to the rotation direction of the movable ring.

10. The expansion type cut-off door for drainage engineering according to claim 1, characterized in that, A driving motor is arranged on the fixed seat, a driving gear is arranged at the output end of the driving motor, a toothed ring is arranged on the movable ring, and the toothed ring meshes with the driving gear.

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