CN217643775U - Heating device for inner hole of large workpiece - Google Patents
Heating device for inner hole of large workpiece Download PDFInfo
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- CN217643775U CN217643775U CN202221423834.XU CN202221423834U CN217643775U CN 217643775 U CN217643775 U CN 217643775U CN 202221423834 U CN202221423834 U CN 202221423834U CN 217643775 U CN217643775 U CN 217643775U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The utility model discloses a large-scale work piece hole heating device relates to metal material equipment for heat treatment technical field. The utility model discloses a large-scale work piece hole heating device, including large-scale work piece, the vertical heating through-hole that has seted up in the middle part of the work piece body, the vertical heating coil that is provided with in the heating through-hole, heating coil external induction heating temperature control system; the induction heating temperature control system comprises a thermocouple, the thermocouple is connected with an induction heater through a lead, and the temperature value acquired by the thermocouple is used for controlling the starting and stopping time of the induction heater, so that the temperature rise speed during induction heating is controlled, and the process requirements of preheating a large workpiece before welding, stress relief annealing after welding and the like are met. The heating coil is wrapped with heat insulation asbestos so as to prevent the heating coil from being scalded by a heated workpiece; the heating coil is hollow copper pipe, and it is external to have the water tank through the pipeline for lead to water to heating coil inside, cool down the cooling to it, avoid the too high damage heating coil of heating temperature.
Description
Technical Field
The utility model relates to a metal material equipment for heat treatment technical field, the more specifically large-scale work piece hole heating device that says so.
Background
The small workpiece can be heated by torch baking or integrally loading into a heating furnace, the large workpiece has no proper heating furnace due to large volume, the heat of the torch heating is small, the workpiece heat dissipation is fast, and the process temperature cannot be reached. In particular, large workpieces are repaired and welded on site, equipment workpieces are integrated with concrete or other equipment, and only heating measures can be taken on site to ensure process requirements.
In the defect repair welding process of large castings and forgings, workpieces need to be preheated before welding and destressing after welding, and are heated. At present, flame heating or resistance heating is generally used, and has some engineering problems, such as low heating efficiency, serious pollution and severe operating environment, and the production cost of enterprises is increased. Resistance heating all uses the electric energy with electromagnetic induction heating, but under the same conditions, electromagnetic induction heating economizes on electricity more than 60% than resistance-type heating mode, and preheating time shortens 2/3, and moreover, resistance heating, heating cable itself produce the heat, and life is short, therefore resistance-type heating need often maintain with the periodic replacement heating collar, the later maintenance expense is high.
SUMMERY OF THE UTILITY MODEL
1. Technical problem to be solved by the utility model
Aiming at the defects and shortcomings of the prior art, the utility model designs a heating device for an inner hole of a large-sized workpiece, which comprises a heating coil vertically arranged in the large-sized workpiece, wherein the heating coil is externally connected with an induction heating temperature control system, so that the large-sized workpiece is inductively heated, and the temperature rise speed during induction heating is convenient to control; and the operation is simple and convenient, and the whole large-sized workpiece does not need to be put into a heating furnace for heating.
2. Technical scheme
In order to achieve the above purpose, the utility model provides a technical scheme does:
a heating device for an inner hole of a large-sized workpiece comprises the large-sized workpiece, wherein the large-sized workpiece comprises a workpiece body, a heating through hole is vertically formed in the middle of the workpiece body, a heating coil is vertically arranged in the heating through hole, the heating coil is externally connected with an induction heating temperature control system so as to install the heating coil into the large-sized workpiece from the heating through hole, and therefore the large-sized workpiece is subjected to induction heating; the temperature rise speed during induction heating is controlled by an external induction heating temperature control system so as to meet the requirements of process temperature and temperature rise.
According to the technical scheme, the induction heating temperature control system comprises a thermocouple, a thermocouple mounting hole is transversely formed in the middle of the workpiece body, the thermocouple is mounted in the thermocouple mounting hole and connected with an induction heater through a lead, and the start-stop time of the induction heater is controlled through the temperature value acquired by the thermocouple during induction heating, so that the temperature rise speed during induction heating is controlled, and the process requirements of large-sized workpieces such as pre-welding and post-welding stress relief annealing are met.
According to a further technical scheme, the thermocouple is externally connected with a temperature display device, and the heating power of the induction heater is adjusted according to temperature display.
According to the further technical scheme, when preheating is carried out before welding, the heating temperature of the induction heater is 150-200 ℃, and the heating power is 50-55 KW.
According to a further technical scheme, when the stress is removed after local welding, the heating coil is inserted into the large workpiece from the heating through hole, the heating temperature of the stress removal heating of the induction heater after welding is 550-580 ℃, and the heat preservation time is 5-6 hours, so that the surface layer of the large workpiece is heated to be 30-50 mm inwards.
Further technical scheme, heating coil is hollow spiral copper tubular construction, and it includes water inlet and delivery port that communicates each other, water inlet and delivery port have the water tank through the pipeline external for lead to water to heating coil inside, cool off the cooling to it, avoid the too high damage heating coil of heating temperature.
According to the further technical scheme, a water inlet joint is installed at the outer port of the water inlet, and the through port of the water inlet joint is communicated with a water inlet and return pump arranged at the upper part of the water tank through a water inlet pipe; and a water outlet joint is arranged at the outer port of the water outlet, and the through port of the water outlet joint is communicated with a water inlet and return pump.
According to a further technical scheme, the heating coil is made of a red copper tube, and the outer diameter size of the heating coil is smaller than that of the heating through hole, so that the heating coil is conveniently installed in the heating through hole, and a large workpiece is heated.
According to the further technical scheme, a heat preservation and insulation device is arranged on the periphery of the heating coil and made of heat preservation and insulation asbestos so as to be suitable for the problems that a large-sized workpiece is large in size, heat conduction is high, surface heat dissipation is high and the like, and the heating coil is prevented from being damaged by the heated large-sized workpiece at high temperature.
3. Advantageous effects
Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:
(1) The utility model discloses a large-scale work piece hole heating device, include the heating coil that sets up vertically in large-scale work piece, heating coil external induction heating temperature control system to carry out induction heating to large-scale work piece, the temperature rise speed when controlling induction heating through external induction heating temperature control system, in order to satisfy process temperature, temperature rise requirement; the operation is simple and convenient, and the whole large-sized workpiece does not need to be put into a heating furnace for heating;
(2) The utility model discloses a large-scale work piece hole heating device, induction heating temperature control system include the thermocouple, the thermocouple is connected with induction heater through the wire, the temperature value through the thermocouple collection during induction heating to control induction heater's start-stop time, thereby the temperature rise speed during control induction heating, in order to satisfy large-scale work piece preheat before welding and after-weld destressing annealing process requirement;
(3) The utility model relates to a large-scale work piece hole heating device, the thermocouple is externally connected with a temperature display device, and the heating power of an induction heater is adjusted according to the temperature display;
(4) The utility model discloses a large-scale work piece hole heating device, heating coil is connected with the water tank through the pipeline external, is used for carrying on the water-through to heating coil inside, in order to cool it down, avoid the heating coil of damage of too high heating temperature;
(5) The utility model discloses a large-scale work piece hole heating device, heating coil material are copper tubing, and its external diameter size is less than heating through-hole internal diameter size, and its periphery is provided with heat preservation heat-proof device, heat preservation heat-proof device material is thermal-insulated asbestos to work piece high temperature that protection heating coil is not heated through heat preservation heat-proof device is ruined and is lost, avoids large-scale work piece volume great, heat-conduction and the more scheduling problem of surface heat dissipation.
Drawings
FIG. 1 is a schematic view of the heating state of the inner hole heating device according to the present invention;
FIG. 2 is a schematic view of the internal structure of FIG. 1;
FIG. 3 is a schematic view of the cooling state of the inner hole heating device according to the present invention;
FIG. 4 is a schematic perspective view of the large workpiece shown in FIG. 1;
FIG. 5 is a schematic view of the internal structure of FIG. 4;
fig. 6 is a schematic perspective view of a heating coil in the inner hole heating device of the present invention.
In the figure: 1-large-scale work piece; 11-a workpiece body; 12-heating the through hole; 13-thermocouple mounting holes; 2-a heating coil; 21-a water inlet; 22-a water outlet; 3-a water inlet joint; 4-water outlet joint; 5-a water tank; 6-water inlet and return pump; 61-a water inlet pipe; 62-water outlet pipe; 7-an induction heater; 71-a wire; 8-thermocouple.
Detailed Description
For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings.
Example 1
The large workpiece inner hole heating device of the embodiment is shown in fig. 1-2, and comprises a large workpiece 1, wherein the large workpiece 1 comprises a workpiece body 11, a heating through hole 12 is vertically formed in the middle of the workpiece body 11, a heating coil 2 is vertically arranged in the heating through hole 12, and the heating coil 2 is externally connected with an induction heating temperature control system so as to load the heating coil 2 into the large workpiece 1 from the heating through hole 12, so that the large workpiece 1 is inductively heated, the operation is simple and convenient, and the large workpiece 1 does not need to be entirely placed in a heating furnace for heating; the temperature rise speed during induction heating is controlled by an external induction heating temperature control system so as to meet the requirements of process temperature and temperature rise.
In this embodiment, the heating coil 2 is made of a copper tube, and the outer diameter of the copper tube is smaller than the inner diameter of the heating through hole 12, so that the heating coil 2 is conveniently installed in the heating through hole 12, and the large workpiece 1 is heated. The periphery of the heating coil 2 is provided with a heat preservation and heat insulation device which is made of heat insulation asbestos so as to be suitable for the problems that the large workpiece 1 is large in size, heat conduction and surface heat dissipation are more and the like, and the large workpiece 1 heated by the heating coil 2 is prevented from being damaged at high temperature.
Example 2
The basic structure of the heating device for the inner hole of the large workpiece in the embodiment is the same as that of the embodiment 1, and the differences and improvements are as follows: as shown in fig. 3 to 5, the induction heating temperature control system includes a thermocouple 8, a thermocouple mounting hole 13 is transversely formed in the middle of the workpiece body 11, the thermocouple 8 is installed in the thermocouple mounting hole 13, the thermocouple 8 is connected to the induction heater 7 through a wire 71, and the start-stop time of the induction heater 7 is controlled by a temperature value acquired by the thermocouple 8 during induction heating, so that the temperature rise speed during induction heating is controlled, and the process requirements of preheating before welding and stress relief annealing after welding of the large workpiece 1 are met. The thermocouple 8 is externally connected with a temperature display device, and the heating power of the induction heater 7 is adjusted according to the temperature display.
In the embodiment, when preheating before welding, the heating temperature of the induction heater 7 is 150-200 ℃, and the heating power is 50-55 KW; when the stress is removed after local welding, the heating coil 2 is inserted into the large workpiece 1 from the heating through hole 12, the heating temperature of the stress removal after the welding of the induction heater 7 is 550-580 ℃, and the heat preservation time is 5-6 h, so that the surface layer of the large workpiece 1 is heated to the inner 30-50 mm.
Example 3
The basic structure of the inner hole heating device for the large-sized workpiece is the same as that of the heating device in the embodiment 2, and the differences and improvements are as follows: as shown in fig. 6, the heating coil 2 includes a water inlet 21 and a water outlet 22 which are communicated with each other, the water inlet 21 and the water outlet 22 are externally connected with a water tank 5 through pipelines, and the water tank is used for introducing water into the heating coil 2 to cool the heating coil and prevent the heating coil 2 from being damaged due to overhigh heating temperature. As shown in fig. 3, a water inlet joint 3 is installed at an outer port of the water inlet 21, and a through port of the water inlet joint 3 is communicated with a water inlet and return pump 6 arranged at the upper part of the water tank 5 through a water inlet pipe 61; the outer port of the water outlet 22 is provided with a water outlet joint 4, and the through port of the water outlet joint 4 is communicated with the water inlet and return pump 6 through a pipe 62.
The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.
Claims (9)
1. The utility model provides a large-scale work piece hole heating device which characterized in that: the large-scale workpiece heating device is characterized by comprising a large-scale workpiece (1), wherein the large-scale workpiece (1) comprises a workpiece body (11), a heating through hole (12) is vertically formed in the middle of the workpiece body (11), a heating coil (2) is vertically arranged in the heating through hole (12), and the heating coil (2) is externally connected with an induction heating temperature control system.
2. The device for heating the inner hole of the large-sized workpiece according to claim 1, wherein: the induction heating temperature control system comprises a thermocouple (8), the thermocouple (8) is arranged on the workpiece body (11) through a thermocouple mounting hole (13) transversely formed in the middle of the workpiece body (11), and the thermocouple (8) is connected with an induction heater (7) through a lead (71).
3. The device for heating the inner hole of the large-sized workpiece according to claim 2, wherein: the thermocouple (8) is externally connected with a temperature display device.
4. The device for heating the inner hole of the large-sized workpiece according to claim 2, wherein: the preheating heating temperature of the induction heater (7) before welding is 150-200 ℃, and the heating power is 50-55 KW.
5. The device for heating the inner hole of the large-sized workpiece according to claim 4, wherein: the post-welding stress-relief heating temperature of the induction heater (7) is 550-580 ℃, and the heat preservation time is 5-6 h.
6. The device for heating the inner hole of the large-sized workpiece according to claim 1, wherein: the heating coil (2) is of a hollow copper tube structure and comprises a water inlet (21) and a water outlet (22) which are communicated with each other, and the water inlet (21) and the water outlet (22) are externally connected with a water tank (5) through pipelines.
7. The device for heating the inner hole of the large-sized workpiece according to claim 6, wherein: a water inlet joint (3) is arranged at the outer end opening of the water inlet (21), and the through opening of the water inlet joint (3) is communicated with a water inlet and return pump (6) arranged at the upper part of the water tank (5) through a water inlet pipe (61); the water outlet joint (4) is installed at the outer port of the water outlet (22), and the through hole of the water outlet joint (4) is communicated with the water inlet and return pump (6) through a pipe (62).
8. The device for heating the inner hole of the large-sized workpiece according to any one of claims 1 to 7, characterized in that: the heating coil (2) is made of a copper tube, and the outer diameter size of the heating coil is smaller than the inner diameter size of the heating through hole (12).
9. The device for heating the inner hole of the large-sized workpiece according to claim 8, wherein: the periphery of the heating coil (2) is provided with a heat preservation and insulation device, and the heat preservation and insulation device is made of heat insulation asbestos.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221423834.XU CN217643775U (en) | 2022-06-08 | 2022-06-08 | Heating device for inner hole of large workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221423834.XU CN217643775U (en) | 2022-06-08 | 2022-06-08 | Heating device for inner hole of large workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217643775U true CN217643775U (en) | 2022-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221423834.XU Active CN217643775U (en) | 2022-06-08 | 2022-06-08 | Heating device for inner hole of large workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217643775U (en) |
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2022
- 2022-06-08 CN CN202221423834.XU patent/CN217643775U/en active Active
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