Constant-temperature maintenance system suitable for pier body constructed in winter

Abstract

The utility model discloses a constant-temperature maintenance system for a pier body constructed in winter, which comprises a first thermal insulation layer laid on the top of the pier body, at least two electric heating units and a monitoring unit, the electric heating units and the monitoring unit are wrapped on the pier body, and the electric heating units are cable heating wires. Each electric heating unit is fixed to the outer side face of a panel of the pier body formwork in the circumferential direction of the pier body, and a second heat preservation layer made of non-combustible heat preservation materials is further arranged between each pair of back steel of the panel. The monitoring unit comprises a temperature sensor and a controller which are arranged on the inner face of the panel, and the signal output end of the temperature sensor is connected with the signal input end of the controller. The existing formwork needed by pier body pouring is fully utilized, the cable heating wire is directly laid on the outer surface of the formwork, the cable heating wire is used as a heat source, one-time investment is small, the formwork can directly act on pier body concrete, the heat source utilization rate is high, and pier body maintenance energy consumption is reduced. In addition, as the cable is wrapped by the non-combustible heat-insulating layer, open fire is avoided, and the safety is improved; as the cable heating wire is directly laid on the existing template of the pier body, the cable heating wire can be reused, and the cost is further reduced.

Description

Technical Field

[0001] The utility model relates to winter maintenance of a bridge pier body, in particular to a constant temperature maintenance system suitable for pier body construction in winter. Background Art

[0002] During the winter construction process, in order to ensure that the ambient temperature meets the requirements before and during the pouring of the pier body concrete, and to ensure that the concrete is not frozen during the strength formation process after pouring, it is necessary to preheat the ambient temperature in the formwork before pouring the concrete, and to keep the concrete warm during and after pouring to ensure that the ambient temperature of the concrete is not lower than 5°C. At present, the conventional practice is to set up a greenhouse and install hot air guns, electric heaters, heaters, steam generators and other equipment in the greenhouse to increase the temperature in the greenhouse. However, this method requires setting up a bracket first, and then hanging an insulation tarpaulin on the bracket, which requires more manpower and materials; hot air guns, electric heaters, heaters and other work require special personnel to guard 24 hours a day to reduce the probability of fire; in addition, the greenhouse space is large, and electrical appliances such as hot air guns and electric heaters heat the pier body by increasing the internal temperature of the greenhouse, which has a low heat source utilization rate and high energy consumption. Summary of the invention

[0003] In view of this, the utility model proposes a constant temperature maintenance system suitable for pier body construction in winter. The utility model uses the existing formwork of the pier body to install the cable heating wire, which can be installed when the formwork is constructed, thereby reducing the construction cost. In addition, the utility model uses the cable heating wire as a heat source and directly heats the pier body, which not only improves safety, but also improves the utilization rate of the heat source and reduces energy consumption.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model is suitable for the constant temperature maintenance system of the pier body during winter construction, comprising a first thermal insulation layer laid on the top of the pier body, an electric heating unit and a monitoring unit wrapped on the pier body, wherein there are at least two electric heating units, the electric heating units are cable heating wires, each electric heating unit is fixed to the outer side surface of the panel of the pier body formwork along the circumference of the pier body, and a second thermal insulation layer made of non-combustible thermal insulation material is also arranged between each pair of back steels of the panel; the monitoring unit comprises a temperature sensor and a controller arranged on the inner surface of the panel, and the signal output end of the temperature sensor is connected to the signal input end of the controller.

[0006] Beneficial effects: The utility model makes full use of the existing formwork required for the casting of the pier body, directly lays the cable heating wire on the outer surface of the formwork, and uses the cable heating wire as a heat source, with less one-time investment; because the cable heating wire is laid on the formwork, it can not only directly heat the formwork, but also directly heat the pier body concrete through the formwork, with a high heat source utilization rate, which effectively reduces the energy consumption of constant temperature maintenance of the pier body. In addition, because the cable is wrapped with a non-combustible insulation layer, no open flame will appear, which improves safety and avoids burns to personnel as much as possible. Furthermore, because the cable heating wire is directly laid on the existing formwork of the pier body, it can be reused, further reducing costs.

[0007] Preferably, a fixing unit is welded on the outside of the panel in the same direction as each electric heating unit, and the fixing unit is formed by connecting a plurality of steel pipes welded on the panel, and an electric heating unit is inserted in each fixing unit. The utility model welds the steel pipe on the outside (i.e., the back) of the panel, which is helpful for the installation and heat conduction of the cable heating wire; in addition, for the convenience of construction, the steel pipe adopts a semicircular pipe.

[0008] Preferably, the multiple steel pipes of each fixed unit are arranged in an S shape, and each of the electric heating units is an S-shaped structure formed by connecting multiple cable heating wires through quick-connect plugs, thereby ensuring uniform laying of the cable heating wires.

[0009] Preferably, the temperature sensor is located in the middle and upper part of the pier body, and the distance between the temperature sensor and the panel is ≤5cm. Before pouring, the temperature sensor is used to detect the temperature near the template, and the ambient temperature near the template is heated to above 5°C in combination with the cable heating wire for preheating; during and after pouring, the temperature of the concrete is monitored in real time using the temperature sensor, and the cable heating wire is turned off when the temperature is higher than the maximum limit, and turned on when the temperature is lower than the minimum limit, so that the concrete temperature is within the set range, thereby achieving constant temperature maintenance.

[0010] Compared with the prior art, the utility model makes full use of the existing formwork required for the pier body casting, directly lays the cable heating wire on the outer surface of the formwork, and uses the cable heating wire as a heat source, with less one-time investment; because the cable heating wire is laid on the formwork, it can not only directly heat the formwork, but also directly heat the pier body concrete through the formwork, with a high heat source utilization rate, effectively reducing the energy consumption of constant temperature maintenance of the pier body. In addition, because the cable is wrapped with a non-combustible insulation layer, no open flame will appear, which improves safety and avoids burns to personnel as much as possible. Furthermore, because the cable heating wire is directly laid on the existing formwork of the pier body, it can be reused, further reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the utility model.

[0012] Figure 2yes Figure 1 AA direction schematic diagram.

[0013] Figure 3 yes Figure 2 Enlarged view of part B in the middle.

[0014] Figure 4 yes Figure 1 Side view of.

[0015] Figure 5 It is a control principle block diagram of the utility model. DETAILED DESCRIPTION

[0016] The following is a detailed description of an embodiment of the utility model in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the utility model, and a detailed implementation method and a specific operation process are given, but the protection scope of the utility model is not limited to the following embodiment.

[0017] It should be noted that, in the description of the present utility model, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0018] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connection" that may appear 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0019] It should be pointed out that the formwork for casting the pier body in the utility model is a steel formwork, that is, the panel is a steel plate, and the outer surface (that is, the back side) of the panel is welded with angle steel and back steel along its circumferential direction.

[0020] like Figure 1-5As shown, the constant temperature maintenance system for pier body construction in winter described in the utility model comprises a first insulation layer 1 laid on the top of the pier body, an electric heating unit and a monitoring unit wrapped on the pier body, the first insulation layer 1 adopts insulation tarpaulin or insulation cotton; there are two electric heating units, one of which is laid on the middle and lower part of the outer side of the panel 2 of the pier body template, and the other electric heating unit is laid on the middle and upper part of the outer side; the electric heating unit comprises a plurality of cable heating wires 3, the cable heating wires 3 are electrically connected by plugs, and the cable heating wires 3 are evenly laid on The back of the panel 2 of the pier body formwork further improves the uniformity of heating; in order to improve safety and thermal insulation performance, the back steel 4 of the formwork is filled with a second thermal insulation layer 5 (i.e., a non-combustible thermal insulation layer) made of non-combustible thermal insulation material. The second thermal insulation layer 5 covers the cable heating wire 3 to insulate the cable heating wire 3, reduce heat loss, and improve the utilization rate of the heat source; the monitoring unit includes a temperature sensor 6 arranged on the inner surface of the panel 2 of the formwork and a controller arranged in the control cabinet 7, and the signal output end of the temperature sensor 6 is connected to the signal input end of the controller. The temperature sensor 6 can monitor the temperature near the formwork and transmit the temperature signal to the controller in the control cabinet 7. The controller processes the temperature signal and displays it on its own display screen. The staff can manually open and close the cable heating wire 3 according to the temperature until the temperature reaches the set range, thereby realizing constant temperature maintenance.

[0021] like Figure 1-4 As shown, a fixing unit is welded on the back of the panel 2, and the fixing unit is arranged around the pier body template. The fixing unit is an S-shaped structure welded by multiple steel pipes 8; a group of cable heating wires 3 are arranged in each fixing unit, so that each group of cable heating wires 3 is also arranged in an S shape, ensuring that the cable heating wires 3 are evenly laid. In addition, the steel pipe 8 is preferably a semicircular steel pipe, and the plane of the semicircular steel pipe is welded on the panel 2 for easy construction.

[0022] Combination Figure 5 It can be seen that in order to improve the automatic control, the control input end of the cable heating wire 3 can also be connected to the control output end of the controller during the actual installation, and the controller can be used to control the power on and off of the cable heating wire 3, and combined with the temperature sensor, the automatic constant temperature maintenance of the pier body concrete can be realized. Of course, the power on and off of the cable heating wire 3 can also be controlled manually, which can be selected in the actual project.

[0023] The temperature sensor 6 is installed at the corresponding position of the middle and upper part of the pier body, and its fixed end is fixed on the inner surface of the panel 2 and the distance between its detection head and the panel 2 is ≤5cm. It is used to detect the ambient temperature and concrete temperature near the panel 2 (of course, in actual work, a handheld thermometer, thermocouple, etc. can also be used for temperature measurement). Specifically, before pouring, the temperature sensor 6 is used to detect the temperature near the template, and the cable heating wire 3 is combined to heat the ambient temperature near the template to above 5°C for preheating; during and after pouring, the temperature sensor 6 is used to monitor the temperature of the concrete in real time, and when the temperature is higher than the maximum limit, the cable heating wire 3 is turned off, and when the temperature is lower than the minimum limit, the cable heating wire 3 is turned on, so that the concrete temperature is within the set range, thereby achieving constant temperature maintenance.

[0024] The installation and use process of the utility model is as follows: before installing the pier body formwork, a semicircular steel pipe with a diameter of 10 mm is welded on the back of the panel 2 of each template. Its direction is S-shaped, and the distance between two adjacent vertical semicircular steel pipes is 30 cm; the upper part of the pier body has an outward expansion section, and the steel pipe of this part is bent and welded on the back of the panel 2. See Figure 1 ; Pass the cable heating wire 3 through the steel pipe on each panel 2, and the power terminal of the cable leaks out of the steel pipe and connects to the control cabinet; fill the non-combustible insulation material between the back steel 4 on the back of the panel 2; then install the pier body formwork, and connect the pier body formwork end to end in sequence; after the pier body formwork is installed, use the connecting joint to connect the cable heating wire on each panel 2 to form a whole, and the terminal of the electric heating unit composed of the cable heating wire is connected to the control cabinet 7;

[0025] A temperature sensor 6 is installed in the panel 2 (corresponding to the upper part of the pier body), the acquisition line of the temperature sensor 6 is connected to the temperature interface of the controller, and the power line of the temperature sensor 6 is connected to the power supply in the access control cabinet 7; the probe of the temperature sensor 6 is 5 cm away from the inner surface of the panel 2; the temperature sensor 6 is used to detect the internal ambient temperature of the template near the template, if the temperature is lower than 5°C, the cable heating wire 3 is started manually or by the controller, and the cable heating wire 3 laid on the template is used for direct heating until the temperature is heated to a specified range;

[0026] When the ambient temperature in the pier body formwork meets the requirements, the pier body concrete is poured. After the concrete pouring is completed, the pier top is covered with a heat-insulating tarpaulin; the temperature is monitored by a temperature sensor 6. If the concrete temperature is lower than the lower limit of the set range, the cable heating wire 3 is manually or automatically started to energize it. The cable heating wire 3 heats up and transfers the generated heat to the formwork, and then the formwork transfers it to the concrete until the temperature of the concrete is within the set range; when the temperature of the pier body concrete is higher than the upper limit, the cable heating wire 3 is turned off and heating is stopped.

[0027] The utility model makes full use of the existing formwork required for pouring the pier body, directly lays the cable heating wire 3 on the outer surface of the formwork, and uses the cable heating wire 3 as a heat source, with less one-time investment; since the cable heating wire 3 is laid on the formwork, it can not only directly heat the formwork, but also directly heat the pier body concrete through the formwork, with a high heat source utilization rate, which effectively reduces the energy consumption of constant temperature maintenance of the pier body. In addition, since the cable is wrapped with a non-combustible insulation layer, no open flame will appear, which improves safety and avoids burns to personnel as much as possible. Its insulation effect can also avoid heat loss as much as possible, thereby improving the utilization rate of the cable heating wire 3 and further reducing energy consumption. Furthermore, since the cable heating wire 3 is directly laid on the existing formwork of the pier body, it can be reused, further reducing costs.

[0028] It should be pointed out that the controller in the present invention can be a general-purpose processor, a special-purpose processor, a conventional processor, a digital signal processor (DSP), multiple microprocessors, one or more microprocessors associated with a DSP core, a controller, a microcontroller, an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) circuit; it can also be a programmable logic controller (PLC) or an industrial computer; the controller can also be provided with a wireless communication module to achieve connection with a remote terminal, receive control instructions from the remote terminal, and also feedback relevant parameters of the real-time working status.

[0029] Finally, it should be emphasized that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Therefore, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A constant temperature maintenance system suitable for pier construction in winter, characterized by: It includes a first insulation layer laid on the top of the pier body, an electric heating unit wrapped on the pier body, and a monitoring unit. There are at least two electric heating units, which are cable heating wires. Each electric heating unit is fixed to the outer side of the panel of the pier body template along the circumference of the pier body. A second insulation layer made of non-combustible insulation material is also arranged between each pair of back steels of the panel. The monitoring unit includes a temperature sensor and a controller arranged on the inner surface of the panel. The signal output end of the temperature sensor is connected to the signal input end of the controller.

2. The constant temperature maintenance system for pier shafts used in winter construction according to claim 1 is characterized in that: A fixing unit which is in the same direction as each electric heating unit is welded on the outside of the panel. The fixing unit is formed by connecting a plurality of steel pipes welded on the panel. An electric heating unit is inserted in each fixing unit.

3. The constant temperature maintenance system for pier shafts used in winter construction according to claim 1 is characterized in that: Each of the electric heating units is an S-shaped structure formed by connecting a plurality of cables through quick-connect plugs.

4. The constant temperature maintenance system for pier shafts used in winter construction according to claim 1 is characterized in that: The temperature sensor is located at the upper middle part of the pier body, and the distance between the temperature sensor and the panel is ≤5cm.

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