Steel bar joint heat treatment device

Abstract

The utility model belongs to the technical field of building construction, and discloses a steel bar joint heat treatment device. The steel bar joint heat treatment device comprises a heating furnace body, a heating coil and a fixing assembly, the heating furnace body is provided with a heating inner cavity, the heating inner cavity is used for containing a joint area of a steel bar, and a through hole for the steel bar to penetrate through is formed in the heating furnace body; the heating coil is arranged in the heating inner cavity, and the heating coil is used for heating a joint area located in the heating inner cavity; the fixing assembly comprises an upper pressing block and a lower pressing block, the upper pressing block and the lower pressing block are both connected to the heating furnace body, and when the reinforcing steel bar penetrates through the heating furnace body, the upper pressing block and the lower pressing block can oppositely abut against the portion, stretching out of the heating inner cavity, of the reinforcing steel bar. The reinforcing steel bar joint heat treatment device can heat a joint area of a reinforcing steel bar at different placement angles and different placement directions, is suitable for various construction scenes, and is high in practicability and high in heat treatment efficiency.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a heat treatment device for steel bar joints. Background Technology

[0002] During engineering construction, in order to meet the required length of steel bars for buildings, it is necessary to connect two or more steel bars end to end to form a longer steel bar. Currently, the most common steel bar connection methods are welding and mechanical connection. However, regardless of the connection method, the connection process will cause varying degrees of damage to the joint area of ​​the steel bars, such as residual stress, stress concentration, microcracks, fatigue limit shortening, and embrittlement of the heat-affected zone. These defects and damages can lead to brittle fracture of the steel bars when under tension, which will seriously affect the service life of the project.

[0003] Currently, in order to eliminate or reduce the above-mentioned defects in the rebar joint area and improve the comprehensive mechanical properties of the rebar, a heat treatment method of heating-insulating-cooling is often used at the rebar joint. However, traditional heat treatment equipment requires the configuration of a production line, which has a complex structure and low processing efficiency, and cannot meet the site environment and construction progress requirements of the construction site.

[0004] Therefore, there is an urgent need to design a heat treatment device to heat treat the rebar joint area at the construction site. Utility Model Content

[0005] The purpose of this utility model is to provide a heat treatment device for steel bar joints, which can perform heat treatment on the joint area of ​​steel bars. It has a simple structure and strong practicality.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides a heat treatment device for steel bar joints, comprising:

[0008] A heating furnace body having a heating inner cavity for accommodating the joint area of ​​the reinforcing bar, and the heating furnace body having a through hole for the reinforcing bar to pass through;

[0009] A heating coil is disposed in the heating cavity and is used to heat the joint area located in the heating cavity;

[0010] The fixing component includes an upper pressure block and a lower pressure block, both of which are connected to the heating furnace body. When the reinforcing bar is inserted into the heating furnace body, the upper pressure block and the lower pressure block can press against the portion of the reinforcing bar that extends out of the heating cavity.

[0011] Preferably, the heat treatment device for the rebar joint further includes a temperature sensor for monitoring the temperature in the heating cavity.

[0012] Preferably, the fixing assembly further includes a locking bolt and a locking nut, the locking bolt passing through the upper pressure block and the lower pressure block, the head of the locking bolt pressing against the upper pressure block, the end of the locking bolt extending out of the lower pressure block being connected to the locking nut, and the locking nut pressing against the lower pressure block.

[0013] Preferably, the upper pressure block is provided with an arc-shaped upper mating groove that matches the reinforcing bar, and the lower pressure block is provided with an arc-shaped lower mating groove that matches the reinforcing bar, with the bottom of the upper mating groove and the bottom of the lower mating groove respectively pressing against the reinforcing bar.

[0014] Preferably, the bottom of both the upper and lower mating grooves is provided with a flexible pad.

[0015] Preferably, the heating furnace body includes an upper furnace cover and a lower furnace cover that are rotatably connected, the upper pressure block is disposed on the upper furnace cover, and the lower pressure block is disposed on the lower furnace cover;

[0016] When the upper furnace cover and the lower furnace cover are aligned and fastened together to form the heating cavity, the upper pressure block and the lower pressure block press against the reinforcing bar.

[0017] Preferably, the upper furnace cover is provided with an upper groove, and the lower furnace cover is provided with a lower groove. When the upper furnace cover and the lower furnace cover are aligned and fastened together, the upper groove and the lower groove combine to form the through hole.

[0018] Preferably, one of the upper furnace cover and the other of the lower furnace cover is provided with a slot and a buckle, and the buckle can be engaged in the slot.

[0019] Preferably, the heating furnace body is provided with a handle.

[0020] Preferably, a heat insulation layer is provided on the wall surface of the heating cavity.

[0021] The beneficial effects of this utility model are as follows:

[0022] The heat treatment device for rebar joints provided by this utility model includes a heating furnace body, a heating coil, and a fixing assembly. The heating furnace body has a heating cavity for accommodating the rebar joint area. Since the heating cavity is equipped with a heating coil for heating, and the heating furnace body has a through hole for the rebar to pass through, the rebar can pass through the heating furnace body, and the joint area can be heated by the heating coil in the heating cavity, thereby achieving heat treatment of the rebar joint area. The fixing assembly includes an upper pressure block and a lower pressure block, both of which are connected to the heating furnace body. When heat treatment is performed on the rebar joint area, the upper pressure block and the lower pressure block can press against the part of the rebar extending out of the heating cavity, thereby pressing and fixing the rebar, so that the rebar can remain relatively fixed with the heating furnace body, preventing the rebar from sliding axially relative to the heating furnace body during heat treatment. This rebar joint heat treatment device has a simple structure and is easy to use. It can press and fix the rebar to ensure the heat treatment effect on the joint area. At the same time, because the fixing component can press and fix the rebar, the rebar joint heat treatment device can heat the joint area of ​​the rebar at different placement angles and directions. It is suitable for a variety of construction scenarios, with strong practicality and high heat treatment efficiency. Attached Figure Description

[0023] Figure 1 This is a front view of the heat treatment device for steel bar joints provided in a specific embodiment of this utility model;

[0024] Figure 2 This is a side view of the heat treatment device for steel bar joints provided in a specific embodiment of this utility model;

[0025] Figure 3 This is a top view of the heat treatment device for steel bar joints provided in a specific embodiment of this utility model.

[0026] In the picture:

[0027] 1-Heating furnace body; 11-Upper furnace cover; 12-Lower furnace cover;

[0028] 2-Heating coil;

[0029] 3-Fixing component; 31-Upper pressure block; 32-Lower pressure block; 33-Locking bolt; 34-Locking nut;

[0030] 4-Temperature sensor;

[0031] 5-Handle. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] like Figures 1 to 3 As shown, this utility model provides a heat treatment device for rebar joints. The heat treatment device for rebar joints includes a heating furnace body 1, a heating coil 2, and a fixing component 3. The heating furnace body 1 has a heating inner cavity for accommodating the joint area of ​​the rebar. The heating furnace body 1 has a through hole for the rebar to pass through. The heating coil 2 is disposed in the heating inner cavity and is used to heat the joint area located in the heating inner cavity. The fixing component 3 includes an upper pressure block 31 and a lower pressure block 32. Both the upper pressure block 31 and the lower pressure block 32 are connected to the heating furnace body 1. When the rebar passes through the heating furnace body 1, the upper pressure block 31 and the lower pressure block 32 can relatively press against the part of the rebar that extends out of the heating inner cavity.

[0037] Since the heating inner cavity is equipped with a heating coil 2 for heating, and the heating furnace body 1 has a through hole for the steel bar to pass through, the steel bar can be inserted into the heating furnace body 1, and the joint area can be heated by the heating coil 2 in the heating inner cavity, thereby achieving heat treatment of the steel bar joint area; the fixing component 3 includes an upper pressure block 31 and a lower pressure block 32, both of which are connected to the heating furnace body 1. When heat treatment is performed in the joint area of ​​the steel bar, the upper pressure block 31 and the lower pressure block 32 can press against the part of the steel bar that extends out of the heating inner cavity, thereby pressing and fixing the steel bar, so that the steel bar can remain relatively fixed with the heating furnace body 1, preventing the steel bar from sliding axially relative to the heating furnace body 1 during heat treatment. This rebar joint heat treatment device has a simple structure and is easy to use. It can press and fix the rebar to ensure the heat treatment effect on the joint area. At the same time, since the fixing component 3 can press and fix the rebar, the rebar joint heat treatment device can heat the joint area of ​​the rebar at different placement angles and directions. It is suitable for a variety of construction scenarios, with strong practicality and high heat treatment efficiency.

[0038] Specifically, the heating coil 2 is arranged in an S-shape in the heating cavity. A high-frequency heater is connected to the outside of the heating coil 2. The high-frequency heater can use high-frequency current to generate a high-frequency magnetic field through the heating coil 2, thereby generating eddy currents inside the heating coil 2, and thus generating heat to heat the joint area of ​​the steel bar.

[0039] Specifically, when heat-treating the joint area of ​​the reinforcing bars, the construction workers first open the heating furnace body 1, then place the joint area of ​​the reinforcing bars in the heating cavity, and allow the reinforcing bars at both ends of the joint area to pass through the through holes of the heating furnace body 1; then the construction workers use the fixing component 3 to press the reinforcing bars extending out of the heating furnace body 1, so that the reinforcing bars are fixedly connected to the heating furnace body 1, and then the construction workers start the heating coil 2, thereby heat-treating the joint area of ​​the reinforcing bars in the heating cavity.

[0040] It is understandable that the fixing component 3 can be set at only one end of the heating furnace body 1, or two fixing components 3 can be set at both ends of the heating furnace body 1 respectively.

[0041] To monitor the temperature inside the heating cavity in real time, so as to ensure that the heat treatment temperature meets the requirements, such as Figure 1 As shown, the heat treatment device for steel bar joints also includes a temperature sensor 4, which is used to monitor the temperature in the heating cavity.

[0042] The specific structure of the fixing component 3 can be configured according to actual needs, as long as it can achieve the fixing of the reinforcing steel. For example, such as... Figure 2As shown, the fixing component 3 also includes a locking bolt 33 and a locking nut 34. The locking bolt 33 passes through the upper pressure block 31 and the lower pressure block 32. The head of the locking bolt 33 presses against the upper pressure block 31, and the end of the locking bolt 33 extending out of the lower pressure block 32 is connected to the locking nut 34. The locking nut 34 presses against the lower pressure block 32. It can be understood that the upper pressure block 31 and the lower pressure block 32 press against the reinforcing bar in the radial direction. Then, the construction personnel use the locking bolt 33 to pass through the upper pressure block 31 and the lower pressure block 32 in sequence, and screw the locking nut 34 at the end of the locking bolt 33 extending out of the lower pressure block 32 to tighten and lock the upper pressure block 31 and the lower pressure block 32, thereby achieving the clamping and fixing of the reinforcing bar.

[0043] To ensure the clamping stability of the reinforcing bars by the upper pressure block 31 and the lower pressure block 32, the upper pressure block 31 is provided with an arc-shaped upper mating groove that matches the reinforcing bars, and the lower pressure block 32 is provided with an arc-shaped lower mating groove that matches the reinforcing bars. The bottom of the upper mating groove and the bottom of the lower mating groove press against the reinforcing bars respectively. The upper and lower mating grooves increase the contact area between the upper pressure block 31 and the lower pressure block 32 and the reinforcing bars, thereby greatly improving the friction force of the fixing component 3 on the reinforcing bars, and thus effectively ensuring the axial stability of the reinforcing bars.

[0044] To prevent damage to the upper pressure block 31, lower pressure block 32, and reinforcing bars during heat treatment, flexible pads are provided at the bottom of both the upper and lower mating grooves. These flexible pads are made of flexible thermal insulation materials, including but not limited to fiberglass felt, mineral wool, and rubber insulation materials. When clamping and fixing the reinforcing bars, both the upper pressure block 31 and lower pressure block 32 press against the reinforcing bars through the flexible pads, thus avoiding damage to the reinforcing bars from hard contact. At the same time, because the flexible pads are made of flexible thermal insulation materials, they can prevent heat from the reinforcing bar joint area from being transferred to the outside through the upper pressure block 31 and lower pressure block 32, thus avoiding burns to construction personnel and improving operational safety.

[0045] Furthermore, such as Figure 1 and Figure 2 As shown, the heating furnace body 1 includes an upper furnace cover 11 and a lower furnace cover 12 rotatably connected. An upper pressure block 31 is disposed on the upper furnace cover 11, and a lower pressure block 32 is disposed on the lower furnace cover 12. When the upper furnace cover 11 and the lower furnace cover 12 are aligned and fastened together to form a heating cavity, the upper pressure block 31 and the lower pressure block 32 press against the reinforcing steel bars. Specifically, the upper furnace cover 11 is rotatably connected to the lower furnace cover 12 via a hinge. Since the upper pressure block 31 and the lower pressure block 32 are respectively connected to the upper furnace cover 11 and the lower furnace cover 12, when the construction personnel rotate the upper furnace cover 11 to fasten it onto the lower furnace cover 12, the upper pressure block 31 presses against the reinforcing steel bars under the action of the upper furnace cover 11.

[0046] Specifically, the upper furnace cover 11 and the lower furnace cover 12 are provided with a slot and a buckle, respectively. The buckle can be locked in the slot. Construction workers can connect the upper furnace cover 11 and the lower furnace cover 12 by engaging the slot and the buckle, so as to fix the joint area of ​​the reinforcing bar in the heating cavity.

[0047] Specifically, the upper furnace cover 11 is provided with an upper slot, and the lower furnace cover 12 is provided with a lower slot. When the upper furnace cover 11 and the lower furnace cover 12 are fastened together, the upper slot and the lower slot combine to form a through hole. Both the upper slot and the lower slot are semi-circular. When the upper furnace cover 11 is fastened together on the lower furnace cover 12, the upper slot and the lower slot form a through hole. The through hole matches the shape of the reinforcing bar, so that the part of the reinforcing bar located on both sides of the joint area can smoothly extend out of the heating furnace body 1.

[0048] After the heat treatment of the rebar joint area is completed, a handle 5 is provided on the heating furnace body 1 to facilitate the handling of the rebar joint heat treatment device. Specifically, the handle 5 can be provided on the upper furnace cover 11 or the lower furnace cover 12, or the upper part of the handle 5 can be provided on the upper furnace cover 11 and the lower part of the handle 5 can be provided on the lower furnace cover 12. For example, the handle 5 includes an upper handle and a lower handle. The upper handle is connected to the upper furnace cover 11 and the lower handle is connected to the lower furnace cover 12. When the upper furnace cover 11 is fastened to the lower furnace cover 12, the upper handle and the lower handle are engaged to form a complete handle 5.

[0049] To prevent workers from being burned due to excessively high temperatures in the heating furnace 1 during heat treatment, a thermal insulation layer is installed on the wall of the heating cavity. The thermal insulation layer includes, but is not limited to, glass wool, extruded polystyrene board, rigid polyurethane foam insulation board, etc.

[0050] The general steps for using the heat treatment device for rebar joints provided in this embodiment are as follows:

[0051] First, the construction workers rotate the upper furnace cover 11 to open the heating furnace body 1. Then, they place the steel bar on the lower furnace cover 12 and adjust its position so that it is located in the lower slot of the lower furnace cover 12. At the same time, the part of the steel bar extending out of the heating furnace body 1 abuts against the lower pressure block 32.

[0052] Subsequently, the construction workers rotated the upper furnace cover 11 to fasten it onto the lower furnace cover 12. The upper and lower slots of the upper furnace cover 11 are aligned and form a through hole for the steel bar to pass through. At the same time, the upper pressure block 31 presses against the steel bar under the action of the upper furnace cover 11. Then, the construction workers fastened the buckle in the slot. At this time, the joint area of ​​the steel bar is located in the heating cavity formed by the upper furnace cover 11 and the lower furnace cover 12. The part of the steel bar outside the heating furnace body 1 is fixed to the fixing component 3, thus completing the placement and fixing of the steel bar.

[0053] Afterwards, the construction workers started the high-frequency heating machine, and the temperature of the heating coil 2 rose, thereby heating the joint area in the heating cavity; the construction workers can monitor the temperature in the heating cavity in real time through the temperature sensor 4.

[0054] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A heat treatment device for steel bar joints, characterized in that, include: A heating furnace body (1) has a heating inner cavity for accommodating the joint area of ​​the reinforcing bar, and the heating furnace body (1) has a through hole for the reinforcing bar to pass through. A heating coil (2) is disposed in the heating cavity and is used to heat the joint area located in the heating cavity; The fixing component (3) includes an upper pressure block (31) and a lower pressure block (32). The upper pressure block (31) and the lower pressure block (32) are both connected to the heating furnace body (1). When the reinforcing bar is inserted into the heating furnace body (1), the upper pressure block (31) and the lower pressure block (32) can press against the portion of the reinforcing bar that extends out of the heating cavity.

2. The heat treatment device for steel bar joints according to claim 1, characterized in that, The heat treatment device for the steel bar joint also includes a temperature sensor (4), which is used to monitor the temperature in the heating cavity.

3. The heat treatment device for steel bar joints according to claim 1, characterized in that, The fixing component (3) further includes a locking bolt (33) and a locking nut (34). The locking bolt (33) passes through the upper pressure block (31) and the lower pressure block (32). The head of the locking bolt (33) presses against the upper pressure block (31). The end of the locking bolt (33) extending out of the lower pressure block (32) is connected to the locking nut (34). The locking nut (34) presses against the lower pressure block (32).

4. The heat treatment device for steel bar joints according to claim 3, characterized in that, The upper pressure block (31) is provided with an arc-shaped upper mating groove that matches the reinforcing bar, and the lower pressure block (32) is provided with an arc-shaped lower mating groove that matches the reinforcing bar. The bottom of the upper mating groove and the bottom of the lower mating groove respectively press against the reinforcing bar.

5. The heat treatment device for rebar joints according to claim 4, characterized in that, Both the upper and lower mating grooves have flexible pads at their bottoms.

6. The heat treatment device for steel bar joints according to claim 1, characterized in that, The heating furnace body (1) includes an upper furnace cover (11) and a lower furnace cover (12) that are rotatably connected. The upper pressure block (31) is disposed on the upper furnace cover (11), and the lower pressure block (32) is disposed on the lower furnace cover (12). When the upper furnace cover (11) and the lower furnace cover (12) are engaged to form the heating cavity, the upper pressure block (31) and the lower pressure block (32) press against the reinforcing bar.

7. The heat treatment apparatus for steel bar joints according to claim 6, characterized in that, The upper furnace cover (11) is provided with an upper slot, and the lower furnace cover (12) is provided with a lower slot. When the upper furnace cover (11) and the lower furnace cover (12) are fastened together, the upper slot and the lower slot combine to form the through hole.

8. The heat treatment device for steel bar joints according to claim 6, characterized in that, The upper furnace cover (11) and the lower furnace cover (12) are provided with a slot and a buckle, respectively, and the buckle can be locked in the slot.

9. The heat treatment device for steel bar joints according to claim 1, characterized in that, The heating furnace body (1) is provided with a handle (5).

10. The heat treatment apparatus for steel bar joints according to any one of claims 1-9, characterized in that, A heat insulation layer is provided on the wall surface of the heating cavity.

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