Dry type floor heating construction method

Abstract

The invention discloses a dry type floor heating construction method, and relates to the technical field of floor heating construction. Comprising the following steps that S1, construction preparation is conducted, and the field ground self-leveling levelness is checked; s2, material inspection is conducted, specifically, pipe fittings such as a heating pipe, a water distributing and collecting device, a radiator and a valve are inspected; s3, mounting a water distributing and collecting device, wherein the water distributing and collecting device is mounted before the heating pipes are laid; s4, a heat preservation layer is laid, specifically, a special customized flame-retardant groove heat preservation extruded sheet is used for laying; s5, the heating pipes are laid, and the heating pipes are embedded into the groove modules according to the drawing design requirements; and S6, the sub-catchment device is connected with the heating pipe. The construction speed is high, no concrete curing period exists, the installation quality is improved, and the construction period is shortened; heat sources are wide, maintenance is convenient, disassembly and assembly are easy, and repeated use is achieved; energy consumption is low, temperature rise is fast, operation cost is low, structural load bearing can be reduced, and space and materials are saved.

Description

Technical Field

[0001] The invention relates to the technical field of floor heating construction, and in particular to a dry floor heating construction method. Background Art

[0002] With the improvement of economic level, people's demand for comfortable heating life is growing. Traditional heating methods such as radiators, wet floor heating and air conditioning are gradually replaced by more efficient and comfortable floor heating systems. Dry floor heating, as a new floor heating construction technology, has the advantages of light weight, not easy to deform, modular construction, and easy maintenance compared to traditional wet floor heating.

[0003] After searching, the application scheme of Chinese patent application number CN202410800752.X discloses a large-area floor heating rapid installation construction method. The construction personnel reasonably plan the site layout according to the construction site, construction drawings, standard specification information, and comprehensively arrange the integrated pipelines; clean the concrete base of the construction site; lay the insulation layer and the heat accumulation layer on the cleaned concrete base; fix the wire mesh on the top of the heat accumulation layer; fix the heating coil of the floor heating pipeline with the wire mesh according to the planned layout; perform the overall pressure test of the heating coil after all the single-tube pressure tests are completed; maintain the pressure inside the heating coil, pour concrete, and lay the steel mesh on the top of the concrete. The construction method in the above patent has the following shortcomings: there are deficiencies in the details of the laying of the insulation layer and the laying of the heating pipe, which need to be improved. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a dry floor heating construction method.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A dry floor heating construction method comprises the following steps:

[0007] S1: Construction preparation, check the level of the self-leveling surface on site;

[0008] S2: Material inspection, inspection of heating pipes, manifolds, radiators, valves and other pipe fittings;

[0009] S3: Installation of manifolds. The manifolds shall be installed before laying the heating pipes.

[0010] S4: Laying of insulation layer, using specially customized flame-retardant grade groove insulation extruded board for laying;

[0011] S5: Laying of heating pipes: embedding the heating pipes into the groove modules according to the design requirements of the drawings;

[0012] S6: When the manifold is connected to the heating pipe, the exposed pipe section between the ground portion of the heating pipe and the ball valve interface at the bottom of the manifold should be covered with a plastic sleeve;

[0013] S7: System debugging and quality inspection. After the system is fully installed, pressure test each circuit to ensure there is no leakage.

[0014] Preferably, in S1, a straightedge and a wedge-shaped feeler gauge are used to measure the ground level, and the difference in level within a range of 2 meters does not exceed 2 mm.

[0015] Preferably: in the S2, the heating pipe is made of heat-resistant polyethylene (PE-RT) pipe, De20×2.3, and the pipe series grade is S4; one pipe is used for one loop of the heating pipe, and each loop does not exceed 120m; the underground pipes from the water heating main pipe to the indoor manifold are all made of PE-RT pipes, De32×3.6, and the pipe series grade is S4 and passed the thermal stability test and thermal cycle test under the hydrostatic state.

[0016] Preferably, in S3, the manifold is installed as follows:

[0017] The inlet and outlet water pipes at the manifold and radiator are fixed with brackets according to the sample size; the manifold is installed before laying the heating pipes. When installed horizontally, the manifold is installed on the top and the collector is installed on the bottom, with a center distance of 200mm and the center of the collector not less than 300mm from the ground; the pressure of the valve strength test is 1.5 times the working pressure, and the tightness test pressure is 1.1 times the working pressure.

[0018] Preferably: in said S3, during winter construction, a water vapor mixture generated by an automatic boiler is used to heat the pipes and the environment, and after each circuit is installed, the remaining water vapor in the circuit is sucked out with compressed air; a pressure gauge is installed on the manifold during delivery, and the pressure gauge is replaced with an automatic exhaust valve after delivery.

[0019] Preferably, in S4, the insulation layer is made of flame-retardant B1 grade prefabricated grooved polystyrene board, with a thermal conductivity of less than 0.041w / m·k and a density of more than 35kg / m 2 , compressive strength is not less than 250kp.

[0020] Preferably: in S4, the combustion grade of the module is flame retardant B1, the thermal conductivity is less than 0.041w / mk, and the density is greater than 35kg / m 2 ; Compressive strength is not less than 250kp, attached with embossed aluminum plate not less than 0.25mm thick.

[0021] Preferably: in S5, the heating pipe is a PE-RT pipe, De20 or De32, and the pipe series grade is S4.

[0022] Preferably: in S6, the exposed pipe section between the ground portion of the heating pipe and the ball valve interface at the bottom of the manifold should be covered with a plastic sleeve; the plastic sleeve is 150mm to 200mm higher than the decorative surface; the heating pipe is connected to the device and pipe fittings of the manifold by hot-melt connection using a flexible PE-RT joint.

[0023] Preferably: in S7, the water pressure test is carried out circuit by circuit with each group of manifolds and water collectors as the unit, and the test pressure should be 1.5 times the working pressure, and the pressure should not be less than 0.6 MPa.

[0024] The beneficial effects of the present invention are:

[0025] 1. The invention has a fast construction speed, no concrete curing period, improves the installation quality, and shortens the construction period; the heat source is extensive, maintenance is convenient, and it is easy to disassemble and reusable.

[0026] 2. The present invention has low energy consumption, fast heating, low operating cost, and can reduce structural load-bearing, saving space and materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A flow chart of a dry floor heating construction method proposed by the present invention;

[0028] Figure 2 A schematic diagram of the installation of a manifold for a dry floor heating construction method proposed in the present invention. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0030] Embodiment 1:

[0031] A dry floor heating construction method is as follows:

[0032] 1. Construction preparation

[0033] Before the work surface is handed over, the self-leveling level of the on-site ground is checked and the ground level is measured using a straightedge and a wedge-shaped feeler gauge. The horizontal height difference within a range of 2 meters shall not exceed 2mm.

[0034] 2. Material inspection

[0035] The heating pipes are made of heat-resistant polyethylene (PE-RT) pipes for floor heating, De20×2.3, and the pipe series grade is S4. One pipe is used for one loop of the heating pipe, and each loop should not exceed 120m. The underground pipes from the water heating main pipe to the indoor manifold are all made of PE-RT pipes, De32×3.6, and the pipe series grade is S4, and have passed the thermal stability test and thermal cycle test under the hydrostatic state.

[0036] 3. Installation of manifold

[0037] The inlet and outlet pipes at the manifold and radiator are fixed with brackets according to the sample size. The manifold is installed before laying the heating pipes. When installed horizontally, the manifold is installed on the top and the manifold is installed on the bottom. The center distance is 200mm, and the center of the manifold is not less than 300mm from the ground. The valve strength test pressure is 1.5 times the working pressure, and the tightness test pressure is 1.1 times the working pressure. Near the manifold and where the local heating pipes are densely arranged, when the pipe spacing is less than 10mm, the heating pipe is covered with an insulating sleeve. Where the heating pipe passes through the expansion joint of the concrete filling layer, a flexible sleeve is added, and there shall be no joints in the heating pipe in the filling layer. The heating pipe should be kept vertical from the ground to the manifold and water collector. The exposed pipe section between the ground and the lower interface of the manifold and water collector should be covered with a hard plastic sleeve. The sleeve is 150mm higher than the decorative surface. The manifold is on top and the water collector is on the bottom. The spacing is 200mm. The water collector is not less than 300mm from the ground. The heating pipe connection should be tightened with a special torque wrench. In order to ensure the quality and progress of winter construction, the water vapor mixture generated by the automatic boiler is used to heat the pipes and the environment. After each circuit is installed, the remaining water vapor in the circuit is sucked out with compressed air. A pressure gauge is installed on the manifold and water collector at the time of delivery, and the pressure gauge is replaced with an automatic exhaust valve after delivery.

[0038] 4. Laying of insulation layer

[0039] The wooden floor area uses 15mm cement mortar and about 5mm self-leveling to ensure that the error is ≤2mm within a 2-meter range, meeting the flatness requirements of wooden floor laying. The 35mm thick prefabricated extruded polystyrene board groove module is laid on top. Module requirements: combustion grade flame retardant B1, thermal conductivity coefficient ﹤0.041w / mk; density>35kg / m 2 ; The compressive strength is not less than 250kp, and an embossed aluminum plate with a thickness of not less than 0.25mm is attached. Cement mortar is used to level the 200mm inside the bedroom sill. Floor heating pipes are not installed in the locations where there are cabinets in the bedroom and living room, and cement mortar is used directly for leveling. The floor heating pipes in the tile area will be constructed first, and the floor heating pipes in the wooden floor area will be constructed later. Joints will be left in the floor heating pipes in the wooden floor area, and the joint position is greater than 500mm away from the sill; the joints are left in the grooved aluminum plate in the wooden floor area and hot-melt connected. 20mm thick extruded polystyrene board is used as the insulation layer in the three small rooms, and wet floor heating is adopted, and hot and cold pipes are pre-buried in advance. The bulk density of extruded polystyrene board is ≥18kg / m 3 The combustion grade reaches B1, and the thickness meets the requirements of relevant specifications. The edges and corners of the overlapped extruded board must be aligned without gaps; the wall corners must be cut into whole boards, and small pieces of broken boards must not be used for splicing. The groove module is fixed to the ground with benzene board glue or nails.

[0040] 5. Heating pipe laying

[0041] The water pipes use PE-RT coils, which are special pipes for geothermal heating with good thermal stability. The open parts of the pipeline system that are intermittent or completed should be closed at any time; the heating pipes should be kept straight, and the installation error of the pipe spacing should not be greater than 10mm. The heating pipes in the same passage should be kept horizontal. The bending radius of the heating pipe should not be less than 8 times the outer diameter of the pipe. The length of the heating pipes of each branch should not be greater than 120m, and the error between the total length of each branch heating pipe and the design drawing should not be greater than 8%. The heating pipes in the same branch should not have joints. The spacing between the heating pipes is generally 200mm. The bending part of the heating coil shall not have hard bending, and the radius of curvature shall comply with the following regulations: the plastic pipe shall not be less than 8 times the outer diameter of the pipe. After the construction of the heating pipe is completed, ensure that the floor heating pipe is not higher than the groove plate. It is forbidden to twist the pipe when installing the heating pipe; when bending the pipe, the top of the arc should be restricted to prevent "dead bends".

[0042] 6. Connection between manifold and heating pipe

[0043] The exposed pipe section between the ground part of the heating pipe and the ball valve interface at the bottom of the manifold should be covered with a plastic sleeve. The sleeve should be 150mm to 200mm higher than the decorative surface. The heating pipe and the manifold device and pipe fittings are connected by hot-melt joints with flexible PE-RT joints.

[0044] 7. System debugging and quality inspection

[0045] After the system is fully installed, separate the main pipe and branch pipe for pressure testing. The water pressure test should be carried out circuit by circuit, with each group of manifolds and water collectors as the unit. The test pressure should be 1.5 times the working pressure, and the pressure should not be less than 0.6MPa. Under the test pressure, the pressure should be stabilized for 1h, and the pressure drop should not be greater than 0.05Mpa to be qualified. The water pressure test uses a hand water pump to slowly increase the pressure. During the pressure increase process, it should be observed and checked at any time, and there should be no leakage. When the pressure test is carried out in the case of possible freezing, anti-freezing measures should be taken. After the pressure test is completed, the water in the pipe should be blown clean and dried in time. After the heating pipeline is laid and the manifold is installed, the water pressure is raised. After the curing period of the concrete filling layer expires, the pressure test must be carried out again, and there must be on-site inspection and acceptance by the supervisor. After the curing period of the filling layer is over, remove the pressure gauge, temporarily block the water inlet, and wrap it with nylon cloth. The water pressure test should be carried out after the system is flushed. After the heating system passes the pressure test (main pipeline), it shall be flushed with clean water. The flushing water flow rate shall not be less than 1.5 m / s, and the drainage cross-sectional area shall not be less than 60% of the cross-sectional area of ​​the flushing pipe. After the system is flushed, the filters and decontaminants in the system shall be cleaned. After the pipeline is flushed, the water pressure of the system shall be restored to the working pressure, and then blocked so that it can be discovered and handled in time when the pipeline is damaged in the subsequent process. During the initial heating, the hot water temperature should rise slowly, and the water supply temperature should be controlled at about 10°C higher than the ambient temperature at that time, and should not be higher than 32°C; and it should run continuously for 48 hours; thereafter, the water temperature shall be increased by 3°C every 24 hours until the designed water supply temperature is reached. At this temperature, the heating pipes connected to each group of manifolds and water collectors shall be adjusted one by one until the design requirements are met. The number of pressure tests required: no less than 3 times, once when the pipeline construction is completed to the filling layer, once when the completion acceptance is completed, and once when it is delivered and inspected (delivered under pressure); the construction and delivery stages span the winter, and necessary drainage and blowing must be included. After the construction is completed, the pressure is pressed according to the specifications, and the pressure is kept stable from the beginning of ground construction to the completion stage. During winter construction, the water is blown away (if the pressure is pressed during the winter construction stage, the air pressure is used), and the water is refilled and the pressure is maintained before the completion acceptance, delivery or handover of the property.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dry floor heating construction method, characterized in that: The steps include: S1: Construction preparation, check the level of the self-leveling surface on site; S2: Material inspection, inspection of heating pipes, manifolds, radiators and valves; S3: Installation of manifolds. The manifolds shall be installed before laying the heating pipes. S4: Laying of insulation layer, using specially customized flame-retardant grade groove insulation extruded board for laying; S5: Laying of heating pipes: embedding the heating pipes into the groove modules according to the design requirements of the drawings; S6: The manifold is connected to the heating pipe, and a plastic sleeve is added to the exposed pipe section between the ground portion of the heating pipe and the ball valve interface at the bottom of the manifold; S7: System debugging and quality inspection. After the system is fully installed, water pressure testing is carried out circuit by circuit.

2. A dry floor heating construction method according to claim 1, characterized in that: In S1, a straightedge and a wedge-shaped feeler gauge are used to measure the ground level, and the horizontal height difference within a range of 2 meters does not exceed 2 mm.

3. A dry floor heating construction method according to claim 2, characterized in that: In the S2, the heating pipe is made of heat-resistant polyethylene pipe, De20×2.3, and the pipe series grade is S4; one pipe is used for one loop of the heating pipe, and each loop does not exceed 120m; the underground pipes from the water heating main pipe to the indoor manifold are all made of PE-RT pipe, De32×3.6, and the pipe series grade is S4.

4. A dry floor heating construction method according to claim 3, characterized in that: In S3, the manifold is installed as follows: The inlet and outlet water pipes at the manifold and radiator are fixed with brackets according to the sample size; the manifold is installed before laying the heating pipes. When installed horizontally, the manifold is installed on the top and the collector is installed on the bottom, with a center distance of 200mm and the center of the collector not less than 300mm from the ground; the pressure of the valve strength test is 1.5 times the working pressure, and the tightness test pressure is 1.1 times the working pressure.

5. A dry floor heating construction method according to claim 4, characterized in that: In S3, during winter construction, a water vapor mixture generated by an automatic boiler is used to heat the pipes and the environment, and after each circuit is installed, compressed air is used to suck out the remaining water vapor in the circuit; a pressure gauge is installed on the manifold during delivery, and the pressure gauge is replaced with an automatic exhaust valve after delivery.

6. A dry floor heating construction method according to claim 5, characterized in that: In S4, the insulation layer is made of flame-retardant B1 grade prefabricated grooved polystyrene board, the thermal conductivity is less than 0.041w / m·k, and the density is greater than 35kg / m 2 , compressive strength is not less than 250kp.

7. A dry floor heating construction method according to claim 6, characterized in that: In the S4, the module has a flame retardant grade of B1, a thermal conductivity coefficient of ﹤0.041w / mk, and a density of >35kg / m 2 ; Compressive strength is not less than 250kp, attached with embossed aluminum plate not less than 0.25mm thick.

8. A dry floor heating construction method according to claim 7, characterized in that: In the S5, the heating pipe is a PE-RT pipe, De20 or De32, and the pipe series grade is S4.

9. A dry floor heating construction method according to claim 8, characterized in that: In S6, the exposed pipe section between the ground portion of the heating pipe and the ball valve interface at the bottom of the manifold should be covered with a plastic sleeve; the plastic sleeve is 150mm to 200mm higher than the decorative surface; the connection between the heating pipe and the device and pipe fittings of the manifold should be made by hot-melt connection with a flexible PE-RT joint.

10. A dry floor heating construction method according to claim 9, characterized in that: In S7, the water pressure test is carried out circuit by circuit for each group of manifolds and water collectors. The test pressure should be 1.5 times the working pressure and the pressure should not be less than 0.6 MPa.

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