Thermal power plant building construction drainage device
By using a drainage device consisting of steel casing, filter screen, and axial flow pump in the construction of thermal power plants, combined with a layered structure for filtering water sources, the problem of precipitation structure failure caused by coal dust and ash was solved, achieving rapid and economical water filtration and drainage effects while ensuring construction safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-04-07
AI Technical Summary
The dewatering structures built during the construction of thermal power plants are prone to failure due to the incorporation of coal dust and ash, and sludge treatment is resource-intensive and difficult to handle effectively.
A drainage system with steel casing, filter screen and axial flow pump inside the foundation pit is adopted. The water source is filtered by filter plate and filter screen, and the water is pumped to the outside by axial flow pump. Combined with the layered structure of coarse sand layer and clay layer, the filtration and drainage effect is optimized to prevent impurities from clogging.
It achieves rapid and effective water filtration and drainage, reduces the risk of axial flow pump blockage, reduces environmental pollution, lowers construction costs, and ensures construction safety.
Smart Images
Figure CN224092645U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of building construction, especially relates to a power plant building construction drainage device. BACKGROUND
[0002] In the construction process, it is crucial to ensure the stability of the slope and the slope bottom. To prevent the loss of soil particles in the slope or the bottom of the foundation pit, reduce the water content of the soil, improve the physical and mechanical performance indicators of the soil, and enhance the consolidation degree of the soil and the shear strength of the foundation, a foundation pit dewatering well is often used to remove the seepage water on the slope surface and the bottom of the foundation pit to maintain the dryness of the bottom of the foundation pit and facilitate construction.
[0003] Taking the construction of a thermal power plant as an example, there is a large amount of coal powder on site. This causes the rainwater collected by the construction dewatering structure to usually contain a large amount of coal powder and dust, resulting in a high silt content in the accumulated water, and a large amount of sludge seeping into the construction dewatering structure. Over time, the construction dewatering structure is prone to lose its effectiveness. Currently, the treatment of sludge in the construction dewatering structure mainly relies on manual cleaning or sludge pumping. However, these methods not only consume a large amount of resources, but also make it difficult to dispose of the sludge in a timely and effective manner. SUMMARY
[0004] The utility model intends to provide a power plant building construction drainage device to solve the problem of existing dewatering structures being easily invalidated by the infiltration of sludge caused by the mixing of rainwater, coal powder and dust, and the waste of resources and the difficulty in effectively treating sludge in the treatment method.
[0005] The power plant building construction drainage device in the present scheme includes a foundation pit, a steel casing with an open upper end is arranged in the foundation pit, the side walls of the steel pipe casing are uniformly provided with water permeable holes, a filter screen is arranged in the water permeable holes, a filter plate is arranged at the open end of the steel pipe casing, an axial flow pump is arranged in the steel pipe casing, the axial flow pump is connected with a water pumping pipe, and the water pumping pipe penetrates through the filter plate.
[0006] The working principle and beneficial effects of the present scheme are as follows: in use, the water source is filtered by the filter plate and the filter screen, collected in the interior of the steel pipe casing, and then pumped out by the axial flow pump, and finally discharged to a specified position outside through the water pumping pipe. The filter plate and the filter screen in the device of the present scheme can effectively intercept impurities such as coal powder and dust, preventing the axial flow pump from being worn and avoiding the pollution of the discharged water to the environment; the axial flow pump in cooperation with the steel casing can quickly discharge the water in the foundation pit, accelerating the water pumping progress; moreover, the device has a simple structure, is convenient to construct, has a low cost, is easy to operate and maintain, can well adapt to the complex environment of a thermal power plant, meet the construction dewatering requirements of thermal power plants of different scales, timely discharge water, reduce the risk of collapse of the slope of the foundation pit, and ensure the safety of personnel and equipment.
[0007] Further, the foundation pit comprises a coarse sand layer and a clay layer above the coarse sand layer. The good water permeability and preliminary filtering capacity of the coarse sand layer, in combination with the blocking of fine particles by the fine structure of the clay layer, optimizes the filtering and drainage effect, guarantees the water quality in the steel casing, reduces the risk of blockage of the axial flow pump, and improves the drainage water quality; the clay layer enhances the stability of the steel casing in the foundation pit by virtue of its viscosity and plasticity, guarantees the stability of the dewatering operation; it can also adjust the seepage path and speed of underground water, improve the dewatering efficiency and slow down the recharge speed; and the layered structure uses common materials and is low in cost, thereby reducing the material, construction and equipment maintenance costs and improving the economic benefits.
[0008] Further, the top of the foundation pit is provided with a well lid. The well lid improves the safety above the foundation pit.
[0009] Further, the middle and lower part of the steel pipe casing is fixedly connected with a support frame, and the axial flow pump is fixed in the steel casing through the support frame. The position of the axial flow pump is positioned by the support frame.
[0010] Further, the side edge of the bottom of the steel pipe casing is provided with a water collecting hole, and the inner bottom of the steel pipe casing is provided with a filter cartridge for filtering the water flowing into the water collecting hole. The lower part of the steel casing is provided with a water collecting hole and a filter cartridge, the water collecting hole is beneficial to quickly gathering the underground water passing through the coarse sand layer; and the filter cartridge can effectively intercept the particulate impurities in the water flowing into the water collecting hole, prevent the axial flow pump from being blocked during operation, and guarantee the normal operation thereof. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 It is a structural schematic view of the power plant building construction drainage device.
[0012] Figure 2 It is a structural schematic view of the power plant building construction drainage device. Figure 1 It is a structural schematic view of the power plant building construction drainage device. DETAILED DESCRIPTION
[0013] The following will be further described in detail through specific embodiments:
[0014] The reference signs in the drawings of the specification comprise: a cable 1, a coarse sand layer 2, a clay layer 3, a steel casing 4, a well lid 5, a filter plate 6, a water permeable hole 7, a filter screen 8, a filter cartridge 9, a support frame 10, an axial flow pump 11, a water pumping pipe 12, and a water collecting hole 13.
[0015] The embodiment is basically as shown in the accompanying drawings Figure 1 and Figure 2The utility model provides a kind of thermal power plant building construction drainage device, including foundation pit, foundation pit includes coarse sand layer 2 and is located the clay layer 3 above coarse sand layer 2, the well lid 5 is equipped above clay layer 3, the steel sleeve pipe 4 with upper end opening is equipped in foundation pit, the opening end of steel sleeve pipe 4 is flush with clay layer 3, filter plate 6 is equipped in steel pipe sleeve, filter plate 6 is close to the opening end of steel sleeve pipe 4, gap is equipped between filter plate 6 and well lid 5, the middle lower part of steel pipe sleeve is fixedly connected with support frame 10, support frame 10 is fixedly connected with axial flow pump 11, axial flow pump 11 is communicated with water pumping pipe 12, the lateral wall of steel pipe sleeve is uniformly distributed with water-permeable hole 7, water-permeable hole 7 is located between filter plate 6 and support frame 10, filter screen 8 is equipped in multiple water-permeable hole 7, water pumping pipe 12 penetrates filter plate 6, the side edge of the bottom of steel pipe sleeve is equipped with water collecting hole 13, the inner wall of steel pipe sleeve is equipped with filter cartridge 9, filter cartridge 9 is located at the bottom position of steel pipe sleeve, filter cartridge 9 is attached to water collecting hole 13, axial flow pump 11 is connected with cable 1, cable 1 is connected with external power supply by penetrating well lid 5.
[0016] When using, by setting foundation pit, the clay layer 3 of foundation pit enhances the stability of steel sleeve pipe 4 in foundation pit by its viscosity and plasticity, guarantees the stability of dewatering operation; it can also adjust the underground water permeation path and speed, improve the dewatering efficiency and slow down the recharge speed, the good water permeability and preliminary filtering capacity of coarse sand layer 2, in cooperation with the block of fine clay layer 3 to fine particles, optimize the filtering and drainage effect, guarantee the water quality in steel sleeve pipe 4, reduce the risk of axial flow pump 11 blockage, improve the drainage water quality, set steel pipe sleeve in foundation pit, water source is filtered by filter plate 6, filter screen 8 and filter cartridge 9 after passing well lid 5, water-permeable hole 7 and water collecting hole 13, is collected to the inside of steel pipe sleeve, and then the water gathered in the inside of steel pipe sleeve is pumped by axial flow pump 11, and is discharged to the designated position outside through water pumping pipe 12.The filter plate 6 and filter screen 8 of the device in the scheme double filter, can effectively intercept impurities such as coal dust and dust, prevent axial flow pump 11 from wearing, and avoid water pollution environment; the water collecting hole 13 is arranged at the bottom, the water entering filter cartridge 9 is filtered, and the axial flow pump 11 is placed at the middle lower position, more sediment will be deposited at the bottom of steel pipe sleeve, so that the axial flow pump 11 can be further prevented from being blocked, the axial flow pump 11 cooperates with steel sleeve pipe 4 to quickly discharge water in foundation pit, and the water pumping progress is accelerated; moreover, the device has simple structure, convenient construction, low cost, easy operation and maintenance, can well adapt to the complex environment of thermal power plant, meet the construction dewatering demand of different scale thermal power plant, timely drainage reduces the risk of foundation pit slope collapse, and guarantees the safety of personnel and equipment.
[0017] The above only is the embodiment of the present application, and the well-known specific structure and characteristics and other common knowledge in the scheme are not described too much here. It should be pointed out that, for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope claimed in the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.
Claims
1. A construction drainage device for thermal power plant buildings, characterized in that: The structure includes a foundation pit, a steel sleeve with an open top, water-permeable holes evenly distributed on the side walls of the steel sleeve, a filter screen inside the water-permeable holes, a filter plate at the open end of the steel sleeve, an axial flow pump inside the steel sleeve, and a pumping pipe connected to the pumping pipe, which passes through the filter plate.
2. The construction drainage device for a thermal power plant building according to claim 1, characterized in that: The foundation pit includes a coarse sand layer and a clay layer above the coarse sand layer.
3. A construction drainage device for thermal power plant buildings according to claim 2, characterized in that: The pit is covered with a manhole cover.
4. A construction drainage device for thermal power plant buildings according to claim 3, characterized in that: A support frame is fixedly connected to the lower middle part of the steel pipe sleeve, and the axial flow pump is fixed inside the steel pipe sleeve through the support frame.
5. A construction drainage device for thermal power plant buildings according to claim 4, characterized in that: The bottom side of the steel pipe sleeve is provided with a water collection hole, and the inner bottom of the steel pipe sleeve is provided with a filter cylinder for filtering the water flowing into the water collection hole.