Prefabricated T-beam heat preservation and maintenance system

Abstract

The utility model discloses a prefabricated T-beam heat preservation and maintenance system which comprises a bottom face heat preservation and maintenance mechanism which comprises a bottom die and a bottom die heat preservation layer arranged on the bottom face of the bottom die. The side face heat preservation maintenance mechanism comprises a side mold, a heat conduction pipe and a side mold heat preservation layer, the heat conduction pipe is arranged on the outer side face of the side mold, the side mold heat preservation layer is arranged on the outer side of the heat conduction pipe, and the side mold heat preservation layer covers the outer side of the side mold; and the top surface heat preservation maintenance mechanism comprises a top surface heating unit and a heat preservation cover. According to the concrete curing device, the mode that a heat source is introduced and the concrete curing device is in contact with a side mold for heating is adopted, the temperature needed by concrete curing can be effectively guaranteed, the turnover speed of a T-beam formwork is increased, heat dissipation of the vibrator is not affected, and normal work of the vibrator is better guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete structure maintenance, in particular to a prefabricated T-beam thermal insulation maintenance system. Background Art

[0002] Precast T-beams are prestressed reinforced concrete bridge components for roads or railways. Their cross-section is shaped like a "T" and there are multiple transverse partitions designed along the length of the beam. The formwork of the precast T-beam consists of a bottom form, a side form and an end form, all of which are steel forms. In order to ensure that the structure of the precast T-beam is not damaged when the formwork is removed, the compressive strength of the concrete when the side formwork is removed is generally required to be no less than 60% of the design strength. The growth rate of concrete strength is closely related to its initial temperature and accelerates with the increase of temperature within a certain range. Therefore, in a low temperature environment, in order to speed up the turnover rate of the side formwork of the precast T-beam, the precast T-beam needs to be insulated and maintained with the formwork.

[0003] There are generally two ways to maintain the thermal insulation of prefabricated T-beams with formwork. The first is the greenhouse method, which is to cover the entire beam and formwork with a shed after the concrete is poured, and heat the shed with hot air or steam. The second is the heat storage method, which is to spray a foam insulation layer on the surface of the formwork, and then cover the top surface of the beam with cotton cloth and other insulation materials after the concrete is poured, using the hydration heat of the concrete to maintain the thermal insulation of the concrete.

[0004] Both of the above methods have certain shortcomings. In the greenhouse method, the space inside the greenhouse is large, the greenhouse cover is not tightly closed, and the heat loss is large, so the energy consumption is high. In addition, the hot air or steam injection in the greenhouse will affect the heat dissipation of the high-frequency vibrator installed on the side form, causing the high-frequency vibrator to overheat. Therefore, it is not suitable for maintaining the temperature of the formwork during concrete pouring. The heat storage method does not have an external heat source, so the formwork cannot be preheated before concrete pouring, and the required curing temperature cannot be guaranteed at low temperatures. Utility Model Content

[0005] The utility model discloses a prefabricated T-beam heat preservation and maintenance system, which adopts the form of introducing a heat source and heating in contact with a side form, thereby solving the shortcomings of the prior art.

[0006] To achieve the above purpose, the technical solution of the utility model is:

[0007] A prefabricated T-beam thermal insulation and maintenance system, comprising:

[0008] A bottom surface heat preservation and maintenance mechanism, comprising a bottom mold and a bottom mold heat preservation layer arranged on the bottom surface of the bottom mold;

[0009] The side heat preservation and maintenance mechanism comprises a side mold, a heat conducting pipe and a side mold heat preservation layer. The heat conducting pipe is arranged on the outer side of the side mold panel of the side mold, and the side mold heat preservation layer is arranged on the outer side of the heat conducting pipe. The side mold heat preservation layer covers the outer side of the side mold.

[0010] Furthermore, it also includes a top surface thermal insulation and maintenance mechanism, which includes a top surface heating unit and a thermal insulation cover. The top surface heating unit is arranged on the top surface working platform of the side mold, and the thermal insulation cover includes a thermal insulation cover frame and a thermal insulation cover insulation layer. Both ends of the thermal insulation cover frame are mounted on the top surface working platform of the side mold and are arranged on the outside of the top surface heating unit. The thermal insulation cover insulation layer can be detachably covered on the thermal insulation cover frame.

[0011] Furthermore, the bottom mold insulation layer is made of foamed polyurethane sprayed on the bottom surface of the bottom mold.

[0012] Furthermore, the heat conduction pipe is arranged in a circuitous manner on the outer side surface of the side mold, one end of which is connected to the first water inlet pipe, and the other end of which is connected to the first water return pipe.

[0013] Furthermore, the side heat preservation and maintenance mechanism also includes a temperature sensor probe, and the temperature sensor probe is arranged on the outer side of the side mold.

[0014] Furthermore, the ceiling heating unit includes a plurality of water radiators, and the water inlet end of each of the water radiators is connected to the second water inlet pipe, and the water outlet end is connected to the second water return pipe.

[0015] Furthermore, the heat-insulating layer of the heat-insulating cover comprises a plurality of heat-insulating cover sections, the heat-insulating cover sections are connected by adhesive parts, and the heat-insulating cover sections are made of quilted waterproof cloth.

[0016] Furthermore, the side mold insulation layer includes an insulation board and a side mold polyurethane coating, the insulation board is arranged between the vertical ribs of the side mold and placed on the outside of the longitudinal ribs of the side mold, and the side mold polyurethane coating is sprayed on the insulation board and the outside of the vertical ribs of the side mold, and fills the gap between the insulation board and the vertical ribs of the side mold.

[0017] Furthermore, the heat conducting pipe is connected to the side mold panel of the side mold through a fixing member;

[0018] The fixing piece is tied with a binding belt, and the other end of the binding belt passes through the insulation board and the side mold polyurethane coating on the outer side of the insulation board and is fixed.

[0019] Furthermore, it also includes a hot water supply mechanism, which includes an air-energy water heater and a circulating water pump, the water outlet end of the circulating water pump is connected to the first water inlet pipe and the second water inlet pipe through a solenoid valve, the first water outlet pipe and the second water outlet pipe are connected to the water inlet end of the air-energy water heater, and the water outlet end of the air-energy water heater is connected to the water inlet end of the circulating water pump.

[0020] The above-mentioned prefabricated T-beam thermal insulation and maintenance system has the following advantages:

[0021] (1) The side heat-insulating and curing mechanism of the utility model is convenient for continuously heating the side formwork before, during and after pouring the precast T-beam concrete, which can effectively ensure the temperature required for concrete curing. In addition, the heating space is smaller, the heat loss is less, and the use is more energy-efficient.

[0022] (2) The utility model adopts a method of direct contact heating between the heat pipe and the side mold, which makes heat conduction more efficient.

[0023] (3) The insulation cover of the top surface insulation and maintenance mechanism of the utility model is a detachable structure, which can be removed when not in use and shrunk or laid flat, which can greatly reduce the site occupation.

[0024] (4) The utility model further uses circulating hot water as a heat source, and the water can be recycled repeatedly, which is more energy-saving and environmentally friendly.

[0025] (5) The use of the utility model for T-beam maintenance can accelerate the growth of precast beam concrete strength and speed up the turnover of formwork. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a front view of the prefabricated T-beam formwork without thermal insulation and curing equipment;

[0027] Figure 2 This is a schematic diagram of the front structure of the prefabricated T-beam with formwork insulation and curing device;

[0028] Figure 3 It is a schematic diagram of the side structure of the prefabricated T-beam with formwork insulation and curing device;

[0029] Figure 4 yes Figure 1 A magnified schematic diagram of center A.

[0030] In the figure, a prefabricated T-beam body 1, a side insulation and maintenance mechanism 2, an L-shaped fixing part 201, a heat conducting pipe 202, a side mold vertical rib 203, a side mold longitudinal rib 204, a first return water pipe 205, a side mold panel 206, a side mold polyurethane coating 207, an insulation board 208, a first water inlet pipe 209, a binding belt 210, a side mold lower tie rod 3, a bottom surface insulation and maintenance mechanism 4, a bottom mold 401, a bottom mold insulation layer 402, a side mold column and a longitudinal rib connecting part 5, a side mold column 6, a side mold top surface working platform 7, a top surface insulation and maintenance mechanism 8, a second water inlet pipe 801, a second return water pipe 802, a water radiator 803, an insulation cover 804, a side mold upper tie rod 9, an attached vibrator 10, and a side mold vertical rib opening 11. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the present utility model, it should be noted that the terms "upper" and "lower" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present utility model.

[0033] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] A prefabricated T-beam insulation and maintenance system, combined with Figure 1 and Figure 2 As shown, it includes a bottom surface heat preservation and maintenance mechanism 4 and a side surface heat preservation and maintenance mechanism 2, wherein: the bottom surface heat preservation and maintenance mechanism 4 includes a bottom mold 401 and a bottom mold heat preservation layer 402 arranged on the bottom surface of the bottom mold 401, and the bottom surface adopts a closed heat preservation structure to reduce heat loss;

[0035] The side heat preservation and maintenance mechanism 2 comprises a side mold, a heat conducting pipe 202 and a side mold heat preservation layer. The heat conducting pipe 202 is arranged on the outer side of the side mold panel 206 of the side mold. The side mold heat preservation layer is arranged on the outer side of the heat conducting pipe 202. The side mold heat preservation layer covers the outer side of the side mold longitudinal ribs 204 and the side mold vertical ribs 203 of the side mold. Hot water is passed through the heat conducting pipe 202 to introduce a heat source to heat the side mold panel 206. The side mold is a steel mold, and heat is conducted through the steel to adjust the temperature of the entire side mold panel 206. This is different from heating first. The air is heated by hot air in the traditional way of heating the formwork. The heat pipe 202 in this embodiment is in direct contact with the side form panel 206, and the heat conduction is more efficient. The outside of the side form is covered with a side form insulation layer. The side insulation and maintenance mechanism 2 adopts the form of introducing a heat source, contact heating of the side form, and a separate sealing of the side form part by an insulation structure. This is convenient for uninterrupted heating of the side form before, during, and after the pouring of precast T-beam concrete, and can effectively ensure the temperature required for concrete maintenance. The heating space is smaller, the heat loss is less, and the use is more energy-efficient.

[0036] Furthermore, the prefabricated T-beam thermal insulation and maintenance system also includes a top surface thermal insulation and maintenance mechanism 8, which includes a top surface heating unit and a thermal insulation cover 804. The top surface heating unit is arranged on the side mold top surface working platform 7. The thermal insulation cover 804 includes a thermal insulation cover frame and a thermal insulation cover insulation layer. The thermal insulation cover frame is mounted on the side mold top surface working platform 7 at both ends and arranged outside the top surface heating unit. The thermal insulation cover insulation layer is detachably covered on the thermal insulation cover frame. The top surface heating unit and the thermal insulation cover frame are both supported by the side mold top surface working platform 7. There is enough space in the thermal insulation cover, which does not affect the top surface finishing work after the T-beam is poured, and the top surface can be immediately insulated and maintained after the concrete is poured.

[0037] Further, the bottom mold insulation layer 402 is made by spraying foamed polyurethane on the bottom surface of the bottom mold 401. The foamed polyurethane has good thermal insulation effect and is easy to spray. The bottom mold 401 is generally divided into multiple sections, each section is sprayed with foamed polyurethane separately, and then assembled together for greater convenience, and can be reused after removal.

[0038] Furthermore, the heat conducting pipe 202 is arranged on the outer side of the side mold in a circuitous manner, with one end connected to the first water inlet pipe 209 and the other end connected to the first water return pipe 205. Figure 3As shown, the heat pipe 202 is arranged in multiple sections in a circuitous manner, so that multiple positions of the entire side mold panel 206 can receive the heat of the heat pipe 202. The present embodiment shows the vertical circuitous arrangement of the heat pipe 202. The spacing between the upper and lower adjacent heat pipes 202 is preferably not more than 50 cm. Note that the arrangement of the heat pipe 4 needs to avoid the attached vibrator 10. The spacing between the heat pipes 4 above and below the attached vibrator 10 can be adjusted appropriately according to the situation. Such an arrangement does not affect the heat dissipation of the attached vibrator 10, ensuring the normal operation of the attached vibrator 10. In addition, the arrangement of the heat pipe 202 is also preferably bypassing the side mold longitudinal ribs 204. According to the conventional side mold arrangement, a plurality of side mold vertical ribs 203 are connected to the outer side of the side mold panel 206 at intervals, dividing the side mold panel 206 into multiple areas, and a heat pipe 202 is arranged in each area to heat the side mold panel 206. In addition, for the first water inlet pipe 209 and the first water return pipe 205, this embodiment provides a preferred arrangement, the first water inlet pipe 209 passes through the side mold vertical rib opening 11, the first water return pipe 205 is fixed to the side mold column and the longitudinal rib connector 5, one of each is provided, the first water inlet pipe 209 and the first water return pipe 205 are respectively connected to the water inlet end and the water outlet end of the heat conducting pipe 202 through a tee. The first water inlet pipe 209 and the first water return pipe 205 can be wrapped with thermal insulation cotton to reduce heat loss.

[0039] Furthermore, the side insulation and maintenance mechanism 2 also includes a temperature sensor probe, which is arranged on the outer side of the side mold. The temperature of the side mold panel 206 can be easily obtained through the temperature sensor probe, and then the water temperature in the heat pipe 202 can be reasonably adjusted to ensure the maintenance quality of the T-beam.

[0040] Further, combined with Figure 3 As shown, the ceiling heating unit includes a plurality of water radiators 803, the water inlet end of each water radiator 803 is connected to the second water inlet pipe 801, and the water outlet end is connected to the second water return pipe 802. The water radiator 803 is connected in parallel with the second water inlet pipe 801 and the second water return pipe 802.

[0041] Furthermore, for the convenience of hoisting, the insulation layer of the insulation cover includes multiple insulation sections, which are connected by adhesives. The insulation sections of the insulation cover are made of quilted waterproof cloth, which can reduce the influence of external moisture on the maintenance of the T beam to a certain extent and play a good role in heat preservation. The adhesive can be Velcro.

[0042] Furthermore, the side mold insulation layer includes an insulation board 208 and a side mold polyurethane coating 207. The insulation board 208 is arranged between the side mold vertical ribs 203 and is placed on the outside of the side mold longitudinal ribs 204. The side mold polyurethane coating 207 is sprayed on the insulation board 208 and the outside of the side mold vertical ribs 203, and fills the gap between the insulation board 208 and the side mold vertical ribs 203. That is, each area divided by the side mold vertical ribs 203 is shielded by the insulation board 208, and the insulation board 208, the side mold vertical ribs 203, and the gap between the insulation board 208 and the side mold vertical ribs 203 that are exposed to the outside are covered by the side mold polyurethane coating 207, which can achieve a good insulation effect.

[0043] Further, combined with Figure 4 As shown, the heat pipe 202 is connected to the side mold panel 206 of the side mold through a fixing piece. This embodiment provides a preferred structure of the fixing piece, which can be cut by angle steel to form an L-shaped fixing piece 201. The L-shaped fixing piece 201 clamps the heat pipe 202 from the outside of the heat pipe 202, and the two ends are evenly welded to the side mold panel 206. The heat pipe 202 is spaced to match multiple L-shaped fixing pieces 201, and then fixation can be achieved. In addition, a preferred method is also provided for fixing the insulation board 208. The fixing piece is tied with a tying belt 210, and the other end of the tying belt 210 passes through the insulation board 208 and the side mold polyurethane coating 207 on the outside of the insulation board 208 and is fixed. The other end can be fixed by tying a knot or clamping it in a circle.

[0044] Furthermore, it also includes a hot water supply mechanism, which includes an air-energy water heater and a circulating water pump. The water outlet of the circulating water pump is connected to the first water inlet pipe 209 and the second water inlet pipe 801 through a solenoid valve, respectively, the first water outlet pipe and the second water outlet pipe are connected to the water inlet of the air-energy water heater, respectively, and the water outlet of the air-energy water heater is connected to the water inlet of the circulating water pump.

[0045] This embodiment provides an application of a prefabricated T-beam thermal insulation and curing device, which specifically includes the following steps:

[0046] (1) Spraying foamed polyurethane on the bottom surface of the bottom mold segment of the prefabricated T-beam, and then assembling the bottom mold segments into a whole to form a bottom mold;

[0047] (2) Assemble the side forms of each side of the prefabricated T-beam separately and connect them into a whole, and install the lateral sliding system;

[0048] (3) The heat conducting pipes 202 are arranged in a circuitous manner in the area between the vertical ribs 203 of the side mold, and each heat conducting pipe 202 is fixed to the side mold panel 206 by an L-shaped fixing piece 201, and the L-shaped fixing piece 201 is welded to the side mold panel 206;

[0049] (4) Use the binding belt 210 to pass through the L-shaped fixing member 201 and pass through the insulation board 208 to bind and fix the insulation board 208;

[0050] (5) Fixing a plurality of temperature sensor probes against the side mold panel 206;

[0051] (6) Pass the first water inlet pipe 209 through the vertical rib opening 11 of the side mold, and connect it to the upper end of each heat transfer pipe 202 through a tee; tie and fix the first water return pipe 205 to the side mold column and the longitudinal rib connector 5, and connect it to the lower end of each heat transfer pipe 202 through a tee;

[0052] (7) Spraying foamed polyurethane on the gaps between the insulation boards 208, the gaps between the insulation boards 208 and the vertical ribs 203 of the side molds, and the exposed surfaces of the vertical ribs 203 of the side molds;

[0053] (8) Place multiple water radiators 803, second water inlet pipes 801, and second water return pipes 802 on the side mold top surface working platform 7. The water inlet end and water outlet end of each water radiator 803 are respectively connected to the second water inlet pipe 801 and the second water return pipe 802 through a tee. The second water inlet pipe 801 and the second water return pipe 802 are tied and fixed to the side mold column 6.

[0054] (9) Install air-energy water heaters and circulating water pumps to form a hot water supply mechanism and connect to the water source;

[0055] (10) Connect the first water inlet pipe 209 and the second water inlet pipe 801 to the water outlet of the circulating water pump of the hot water supply mechanism, and connect the solenoid valve; connect the first water return pipe 802 and the second water return pipe 902 to the water inlet of the air energy water heater of the hot water supply mechanism;

[0056] (11) Install the upper bottom formwork 401 of the precast T-beam body reinforcement, move the side formwork horizontally as a whole to close the formwork, install the precast T-beam bridge deck reinforcement, combine the bottom formwork 401, the side formwork, and the end formwork into a whole, and install the tie rods 13 at the lower part of the side formwork and the tie rods 14 at the upper part of the side formwork to reinforce them;

[0057] (12) Start the hot water supply mechanism, open the solenoid valve between the first water inlet pipe 209 and the water outlet pipe of the hot water supply mechanism, heat the side mold panel 206 to the required temperature and maintain it;

[0058] (13) Casting of precast T-beam concrete;

[0059] (14) After the precast T-beam concrete is poured to form the precast T-beam body 1, the insulation cover 804 is hoisted in sections onto the upper side mold top surface working platform 7, and the insulation cotton cloth of each section of the insulation cover 804 is connected into a whole by Velcro;

[0060] (15) Open the solenoid valve between the second water inlet pipe 801 and the water outlet of the circulating water pump of the hot water supply mechanism to deliver hot water, and heat the air in the insulation cover 804 through the water radiator 803; the operator finishes the top surface of the prefabricated T-beam concrete in the insulation cover 804;

[0061] (16) After the concrete on the top surface of the precast T-beam is finished, the top surface is covered with plastic film to keep it moist. The air in the side formwork and the insulation cover 804 is kept warm. The formwork is insulated and maintained until the concrete reaches the demoulding strength. The water temperature of the air-energy water heater is gradually lowered as needed.

[0062] (17) Stop the hot water supply, complete the mold maintenance, remove the end mold, and move the side mold horizontally to demould.

Claims

1. A prefabricated T-beam insulation and maintenance system, characterized in that include: A bottom surface heat preservation and maintenance mechanism, comprising a bottom mold and a bottom mold heat preservation layer arranged on the bottom surface of the bottom mold; A side heat-insulating maintenance mechanism, comprising a side mold, a heat-conducting pipe and a side mold heat-insulating layer, wherein a heat-conducting pipe is arranged on the outer side of the side mold panel of the side mold, and a side mold heat-insulating layer is arranged on the outer side of the heat-conducting pipe, and the side mold heat-insulating layer covers the outer side of the side mold; The top surface thermal insulation and maintenance mechanism comprises a top surface heating unit and a thermal insulation cover, wherein the top surface heating unit is arranged on the top surface working platform of the side mold, and the thermal insulation cover comprises a thermal insulation cover frame and a thermal insulation layer of the thermal insulation cover, both ends of the thermal insulation cover frame are erected on the top surface working platform of the side mold and are arranged on the outside of the top surface heating unit, and the thermal insulation layer of the thermal insulation cover can be detachably covered on the thermal insulation cover frame.

2. The prefabricated T-beam thermal insulation and maintenance system according to claim 1 is characterized in that: The bottom mold insulation layer is made by spraying foamed polyurethane on the bottom surface of the bottom mold.

3. The prefabricated T-beam thermal insulation and maintenance system according to claim 1 is characterized in that: The heat conduction pipe is arranged on the outer side of the side mold in a circuitous manner, one end of which is connected to the first water inlet pipe, and the other end of which is connected to the first water return pipe.

4. The prefabricated T-beam thermal insulation and maintenance system according to any one of claims 1 to 3, characterized in that: The side heat preservation and maintenance mechanism also includes a temperature sensor probe, and the temperature sensor probe is arranged on the outer side of the side mold.

5. The prefabricated T-beam thermal insulation and maintenance system according to claim 3 is characterized in that: The top surface heating unit comprises a plurality of water radiators, the water inlet end of each of the water radiators is connected to the second water inlet pipe, and the water outlet end is connected to the second water return pipe.

6. The prefabricated T-beam thermal insulation and maintenance system according to claim 1 is characterized in that: The heat preservation cover heat preservation layer comprises a plurality of heat preservation cover heat preservation sections, the heat preservation cover heat preservation sections are connected by adhesive parts, and the heat preservation cover heat preservation layer is made of quilted waterproof cloth.

7. The prefabricated T-beam thermal insulation and maintenance system according to any one of claims 1 to 3, characterized in that: The side mold insulation layer includes an insulation board and a side mold polyurethane coating. The insulation board is arranged between the vertical ribs of the side mold and is placed on the outside of the longitudinal ribs of the side mold. The side mold polyurethane coating is sprayed on the insulation board and the outside of the vertical ribs of the side mold, and fills the gap between the insulation board and the vertical ribs of the side mold.

8. The prefabricated T-beam thermal insulation and maintenance system according to claim 7, characterized in that: The heat conducting pipe is connected to the side mold panel of the side mold through a fixing piece; The fixing piece is tied with a binding belt, and the other end of the binding belt passes through the insulation board and the side mold polyurethane coating on the outer side of the insulation board and is fixed.

9. The prefabricated T-beam thermal insulation and maintenance system according to claim 5, characterized in that: It also includes a hot water supply mechanism, which includes an air-energy water heater and a circulating water pump. The water outlet of the circulating water pump is connected to the first water inlet pipe and the second water inlet pipe through a solenoid valve, respectively. The first water return pipe and the second water return pipe are connected to the water inlet of the air-energy water heater, respectively. The water outlet of the air-energy water heater is connected to the water inlet of the circulating water pump.

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