Primary and secondary door structure for sewage pretreatment

Abstract

The utility model discloses a primary and secondary door structure for sewage pretreatment, relates to a gate structure, and solves the problems that an existing gate lacks more ways for utilizing intercepted raw water, and pipeline sludge needs to be cleaned regularly in a subsequent pipe section, otherwise, the working efficiency of the gate is influenced. Comprising a channel and a gate body installed in the channel, and a desilting runner is further formed in the bottom of the channel; the gate body comprises a main gate arranged in a channel in a blocking mode and a sub-gate arranged in a dredging flow channel in a blocking mode, the sub-gate is connected to the lower side of the main gate, and the main gate and the sub-gate are further correspondingly connected with opening and closing devices for controlling the main gate and the sub-gate to be opened and closed up and down respectively. The potential energy generated by raw water intercepted at the front end can be used for flushing sludge deposited in a subsequent pipe section, and the purpose of channel dredging is achieved.

Description

Technical Field

[0001] The utility model relates to a gate structure, in particular to a mother - daughter gate structure for sewage pretreatment. Background Art

[0002] A gate is a control facility for closing and opening a water discharge (release) channel. It is an important part of a hydraulic structure and can be used to intercept water flow, control water level, regulate flow rate, discharge sediment and floating objects, etc. However, the existing gates lack more utilization ways for the intercepted raw water. In the subsequent pipe sections, it is necessary to regularly clean the pipe silt, otherwise it will affect its working efficiency. Content of the Utility Model

[0003] The purpose of the utility model is to provide a mother - daughter gate structure for sewage pretreatment, which can utilize the potential energy generated by the raw water intercepted at the front end to flush the silt deposited in the subsequent pipe sections, so as to achieve the purpose of channel silt cleaning.

[0004] The above - mentioned technical purpose of the utility model is achieved through the following technical solutions:

[0005] A mother - daughter gate structure for sewage pretreatment includes a channel and a gate body installed in the channel. A silt - flushing channel is also opened at the bottom of the channel; the gate body includes a main gate blocking in the channel and a sub - gate blocking in the silt - flushing channel. The sub - gate is connected to the lower side of the main gate, and the main gate and the sub - gate are respectively connected with opening and closing devices for controlling their up - and - down opening and closing.

[0006] Furthermore, the opening and closing device of the main gate includes a double - hanging - point hydraulic opening and closing assembly.

[0007] Furthermore, the opening and closing device of the sub - gate includes a single - hanging - point hand - electric dual - purpose opening and closing assembly.

[0008] Furthermore, the cross - section of the channel is rectangular or square.

[0009] Furthermore, the cross - section of the silt - flushing channel is semi - circular or U - shaped.

[0010] Furthermore, the main gate door panel and the corresponding opening and closing device, and the sub - gate door panel and the corresponding opening and closing device are connected by connecting rods.

[0011] Furthermore, an installation wall is fixed in the channel. The main gate is installed at the lower part of the installation wall. Several groups of steel plates are embedded in the installation wall, and through the steel plate installation rod guides, the corresponding connecting rods pass through the rod guides of the corresponding groups to maintain their straightness.

[0012] Furthermore, several wedge seats are connected to the main gate door frame, and corresponding wedge blocks are connected to the door panel. When the door panel is closed, the wedge surfaces of the wedge blocks and the wedge seats are in full contact.

[0013] Furthermore, grooves are machined on the main door frame and / or the door panel, and a sealing strip is inlaid in the grooves.

[0014] Furthermore, the main door panel includes two front and back pieces fixed to each other, with a middle position between the two door panels being vertically penetrated, and the sub-door is clamped between the two door panels.

[0015] In summary, the present utility model has the following beneficial effects:

[0016] The main door is used to control the interception or passage of a large flow of sewage in the channel, and the silt is deposited through the silt cleaning channel at the bottom of the channel. The sub-door structure in the silt cleaning channel is opened and closed separately to utilize the potential energy generated by the raw water intercepted at the front end to wash the silt deposited in the subsequent pipe sections, achieving the purpose of channel silt cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is Figure 1 a schematic cross-sectional structure diagram of

[0019] In the figure, 1, channel; 2, silt cleaning channel; 3, main door; 31, double-hanging-point hydraulic opening and closing assembly; 32, connecting rod; 4, sub-door; 41, single-hanging-point hand-electric dual-purpose opening and closing assembly; 5, installation wall; 51, steel plate; 52, rod guide frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further describes the specific embodiments of the present utility model in conjunction with the drawings. This embodiment does not constitute a limitation to the present utility model.

[0021] A mother-daughter door structure for sewage pretreatment, as Figure 1 and Figure 2 shown, includes a channel 1 and a gate body installed in the channel 1. A silt cleaning channel 2 is also opened downward at the midpoint position of the bottom of the channel 1; the cross-section of the channel 1 is rectangular or square, and the cross-section of the silt cleaning channel 2 is semi-circular or U-shaped;

[0022] The gate body includes a main door 3 blocking the channel 1 and a sub-door 4 blocking the silt cleaning channel 2. The sub-door 4 is connected to the lower side of the main door 3. By combining the main door 3 and the sub-door 4, the main door 3 and the sub-door 4 are independent of each other and are respectively connected to opening and closing devices for controlling their respective up and down opening and closing; a U-shaped frame body is fixed at the bottom of the silt cleaning channel 2 by secondary grouting to cooperate with the sub-door 4 for closing.

[0023] In this application, the main gate 3 and the sub-gate 4 are combined. The flow-through cross-section of the main gate 3 is a rectangle or square adapted to the channel 1, and can pass sewage with a large flow rate; the flow-through cross-section of the sub-gate 4 is a semi-circular or U-shaped adapted to the dredging channel 2, which can be quickly opened, and the raw water intercepted at the front end generates a large potential energy to flush the subsequent pipe sections, so as to achieve the purpose of dredging the channel 1.

[0024] As Figure 1 shown, the opening and closing device of the main gate 3 includes a double-hoisting-point hydraulic opening and closing assembly 31, which specifically adopts a structure of a hand-electric dual-purpose double-hoisting-point cast iron inlaid copper sealed gate. Through wall-mounted installation, the double-hoisting-point hydraulic opening and closing assembly 31 is selected to perform the opening and closing operations of the gate. The opening and closing speed is 0.5m / min. The double cylinders of the hydraulic opening and closing assembly should be synchronized, and its synchronization accuracy is not greater than 5mm. An electro-hydraulic proportional control valve and a gate position detection system are adopted, and triple hydraulic locking is set to reduce the settlement amount of the gate.

[0025] As Figure 1 shown, the opening and closing device of the sub-gate 4 includes a single-hoisting-point hand-electric dual-purpose opening and closing assembly 41, which specifically adopts a hand-electric dual-purpose single-hoisting-point opening and closing stainless steel soft seal structure. The opening and closing speed is 1.0m / min, and it mainly consists of a valve motor, a reduction device, torque control, stroke control, a hand / electric switching mechanism, on-site operation buttons, etc. It is an existing technology. For example, it can adopt AUMA of Germany, Rotork of the UK, SIPOS of Germany, etc. for mechatronic electric actuators.

[0026] As Figure 1 and Figure 2 shown, the sub-gate 4 can be located at the front / rear lower side of the main gate 3, or can be installed inside the main gate 3; in this embodiment, the main gate 3 door panel includes two positive and negative pieces fixed to each other. The two sides between the two door panels are fixedly closed, while the middle position is vertically through. The sub-gate 4 is clamped between the two door panels, and the sub-gate 4 and the opening and closing device of the sub-gate 4 are installed and opened and closed up and down through the position between the two door panels.

[0027] As Figure 2 shown, between the main gate 3 door panel and the corresponding opening and closing device is connected by a connecting rod 32 and a hydraulic push rod, and between the sub-gate 4 door panel and the corresponding opening and closing device is connected by a connecting rod 32 and a screw; the screw, the push rod and the connecting rod 32 are made of solid 420 stainless steel material. The pulling force of the hydraulic push rod is greater than 1.25 times the gate opening force, and the diameter slenderness ratio of the push rod and the connecting rod 32 is not less than 2.

[0028] An installation wall 5 is fixedly installed at the upper part inside the channel 1. When the main gate 3 is closed, it is blocked below the installation wall 5. The main gate 3 is fixedly installed on the embedded steel parts at the lower part of the installation wall 5. A number of groups of steel plates 51 are also embedded in the installation wall 5, and through the steel plate 51 installation rod guides 52, the corresponding connecting rods 32 pass through the rod guides 52 of the corresponding groups to maintain its straightness (the rod guides 52 are made of stainless steel material and are equipped with phosphor bronze bushings);

[0029] The top of the installation wall 5 is fixedly installed with a single-hoist-point electric and manual dual-purpose opening and closing assembly 41 and a double-hoist-point hydraulic opening and closing assembly 31 through embedded steel parts.

[0030] As Figure 1 shown, for the main gate 3, it is a four-side water-stop and two-way pressure-bearing gate. The positive water pressure is 0.3 MPa, and the reverse water pressure is 0.15 MPa; it adopts a rising rod structure, copper-inlaid sealing water stop, and wall-mounted installation. The main gate 3 door panel is connected to the corresponding opening and closing device by a connecting rod and a hydraulic push rod.

[0031] As Figure 1 shown, the main gate 3 door panel is made of a material not lower than QT450-10, with a sufficient number of transverse and longitudinal stiffeners. Its safety factors for tensile, compressive, and shear strengths are not less than 5, and its bending deformation amount under the maximum operating water head should not be greater than 1 / 1500 of the door panel width; while the door frame is made of a material not lower than QT450-10, with a sufficient cross-section. Its safety factors for tensile, compressive, and shear strengths are not less than 5, and its bending deformation amount under the maximum operating water head should not be greater than 1 / 1000 of the door frame width; Grooves are processed on the main gate 3 door panel and / or door frame, and sealing strips are inlaid in the grooves. The material is tin bronze, and its thickness should not be less than 12 mm, and the width should not be less than 50 mm to ensure that it remains in place without deformation or loosening during the use of the door frame and the door body.

[0032] As Figure 1 shown, the main gate 3 door frame is tightened with auxiliary guide rails by bolts. The auxiliary guide rails are made of the same material as the door frame, and wear-resistant inserts made of tin bronze are installed on the auxiliary guide rails to serve as the sliding surface when the door body is opened and closed;

[0033] A number of wedging devices are connected to the main gate 3 door frame. The wedging devices include wedge seats connected around the door frame and corresponding wedge blocks connected to the door panel. When the door panel is closed, the wedge surfaces of the wedge blocks and the wedge seats are in full contact. The wedge seats are processed with ductile iron or better materials, and the wedge blocks should be made of tin bronze and should be finely processed to ensure the contact of the largest area of the two inclined surfaces, and its contact spots should not be less than 75%;

[0034] The wedging devices are firmly connected to the door frame and the door body with stainless steel fasteners and positioning screws, and should have sufficient adjustability and be fixed after final adjustment. The adjustable part of the wedging device is arranged on the wedge seat to achieve the best water tightness.

[0035] As Figure 1 shown, for the sub-gate 4, it is a four-sided water-stop and two-way pressure-bearing gate. The forward water pressure is 0.3 MPa, and the reverse water pressure is 0.15 MPa. The sub-gate 4 adopts a rising rod structure, rubber seal for water stop, and reserved groove type installation. Its opening and closing device can also be selected as a hydraulic hoist, etc. for rapid opening and closing, and the opening time does not exceed 15 s.

[0036] As Figure 1 shown, the door panel of the sub-gate 4 is made of stainless steel material not lower than SS304. The safety factors of its tensile, compressive, and shear strengths are not less than 2, and the bending deformation amount under the maximum operating head should not be greater than 1 / 1500 of the door panel width; the door frame is made of material not lower than QT450-10, has a sufficient cross-section, and the safety factors of its tensile, compressive, and shear strengths are not less than 5; grooves are machined on the door frame, and a sealing strip is inlaid through a pressing plate. The material is DPEM rubber to ensure that it remains in place without deformation or loosening during use.

[0037] As Figure 1 shown, the auxiliary guide rail of the sub-gate 4 is tightened to the inner side of the door panel of the main gate 3 with bolts. The auxiliary guide rail of the sub-gate 4 is made of tin bronze alloy material, and its length can ensure that the door body of the sub-gate 4 is in a fully open state.

[0038] In this embodiment, the width of the main gate 3 is 5.0 m, the height is 4.0 m, the opening and closing speed is 0.5 m / min, the maximum forward water pressure it bears is 0.3 MPa, the maximum allowable forward leakage rate is 1.25 L / min.m sealing length, the maximum allowable reverse leakage rate is 5.0 L / min.m sealing length, the motor power is 2*11 kw, the width of the sub-gate 4 is 1.0 m, the height is 1.0 m, the opening and closing speed is 1.0 m / min, the maximum forward (reverse) water pressure it bears is 0.3 MPa, the maximum allowable forward (reverse) leakage rate is 0.2 L / min.m sealing length, and the motor power is 11 kw.

[0039] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Those skilled in the art can make various modifications or equivalent replacements to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the technical solution of the present invention.

Claims

1. A mother-daughter door structure for sewage pretreatment, characterized in that: It includes a channel and a gate body installed in the channel, and a dredging channel is also provided at the bottom of the channel; the gate body includes a main gate blocking the channel and a sub-gate blocking the dredging channel. The sub-gate is connected to the lower side of the main gate, and the main gate and the sub-gate are respectively connected with opening and closing devices for controlling their up and down opening and closing.

2. A mother-daughter door structure for sewage pretreatment according to claim 1, characterized in that: The opening and closing device of the main gate includes a double-hoisting-point hydraulic opening and closing component.

3. A mother-daughter door structure for sewage pretreatment according to claim 1 or 2, characterized in that: The opening and closing device of the sub-gate includes a single-hoisting-point hand-electric dual-purpose opening and closing component.

4. A mother-daughter door structure for sewage pretreatment according to claim 1, characterized in that: The cross-section of the channel is rectangular or square.

5. A mother-daughter door structure for sewage pretreatment according to claim 1 or 4, characterized in that: The cross-section of the dredging channel is semi-circular or U-shaped.

6. A mother-daughter door structure for sewage pretreatment according to claim 1, characterized in that: The main gate door panel is connected to the corresponding opening and closing device, and the sub-gate door panel is connected to the corresponding opening and closing device through a connecting rod.

7. A mother-daughter door structure for sewage pretreatment according to claim 6, characterized in that: An installation wall is fixed in the channel. The main gate is installed at the lower part of the installation wall. Several groups of steel plates are embedded in the installation wall, and through the steel plate installation rod guide frame, the corresponding connecting rod passes through the rod guide frame of the corresponding group to maintain its straightness.

8. A mother-daughter door structure for sewage pretreatment according to claim 1 or 6, characterized in that: Several wedge seats are connected to the main gate door frame, and corresponding wedge blocks are connected to the door panel. When the door panel is closed, the wedge surfaces of the wedge blocks and the wedge seats are in full contact.

9. A mother-daughter door structure for sewage pretreatment according to claim 1, wherein: Grooves are machined on the main gate door frame and / or the door panel, and sealing strips are inlaid in the grooves.

10. A mother-daughter door structure for sewage pretreatment according to claim 1, characterized in that: The main gate door panel includes two positive and negative pieces fixed to each other. The middle position between the two door panels is vertically penetrated, and the sub-gate is clamped between the two door panels.

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