Intermediate frequency furnace

Abstract

The utility model discloses an intermediate frequency furnace, which relates to the technical field of intermediate frequency furnaces and comprises an intermediate frequency furnace body, a furnace cover rotatably arranged at the top of the intermediate frequency furnace body and a plurality of water return pipes fixedly arranged on one side of the intermediate frequency furnace body. A dust suction mechanism used for sucking smoke dust in the intermediate frequency furnace body is arranged at the top of the furnace cover, a heat exchange pipe exchanging heat with the high-temperature smoke dust is arranged in the dust suction mechanism, and a scale scraping mechanism used for scraping away scale generated by heat exchange of the outer surface of the heat exchange pipe is arranged at the top of the dust suction mechanism. Through the arrangement of the color developing strips with different colors, the water return pipes can be marked, and the directions of the water return pipes can be marked, so that when a certain water return pipe is blocked, numerous water return pipes can be screened through the colors marked in advance, the non-blocked water return pipes do not need to be manually marked one by one during inspection, and the inspection efficiency is improved. And the maintenance by workers is facilitated, the maintenance time consumption of the workers is reduced, and the downtime is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of medium frequency furnaces, in particular to a medium frequency furnace. Background Art

[0002] The medium frequency furnace is also called the medium frequency electric furnace. The medium frequency electric furnace rectifies the three-phase industrial frequency alternating current into direct current, and then converts the direct current into an adjustable medium frequency current to supply it to the capacitor and induction coil, so that high-density magnetic lines are generated in the induction coil, and the metal material contained in the induction coil is cut, and a large eddy current is generated in the metal material, causing the metal material to heat up and melt.

[0003] The inside of the medium frequency induction furnace needs to be cooled with water to maintain a stable temperature and ensure that the furnace body will not overheat. The closed cooling tower dedicated to the medium frequency electric furnace cools down by setting up a coil radiator, a spray device and an air cooling circulation system. The return water outlet of the coil radiator is connected to the return water pipe of the furnace body and the medium frequency power supply respectively.

[0004] When the return pipe is blocked, the water after heat exchange is difficult to flow out of the medium frequency electric furnace, which reduces the cooling efficiency of the closed cooling tower itself. Workers need to shut down the machine for maintenance, but there are a large number of return pipes. Workers need to check many return pipes one by one to find out the blocked return pipe. When checking, people need to use tools to manually mark the unblocked return pipes one by one to screen out the blocked return pipes. However, marking the return pipes one by one during the inspection will slow down the workers' maintenance speed, resulting in a longer downtime of the medium frequency electric furnace, affecting normal production. Utility Model Content

[0005] The utility model aims at the deficiencies of the prior art and provides a medium frequency furnace. The specific technical scheme is as follows:

[0006] A medium frequency furnace comprises a medium frequency furnace body, a furnace cover rotatably arranged on the top of the medium frequency furnace body, and a plurality of return pipes fixedly arranged on one side of the medium frequency furnace body, the outer walls of the plurality of return pipes are respectively fixedly provided with color display strips of different colors, the top of the furnace cover is provided with a dust suction mechanism for sucking smoke in the medium frequency furnace body, the dust suction mechanism is provided with a heat exchange tube for exchanging heat with high-temperature smoke, and the top of the dust suction mechanism is provided with a scraping mechanism for scraping off scale generated by heat exchange on the outer surface of the heat exchange tube.

[0007] By adopting the above technical solution, different color display strips can mark several return pipes and mark the direction of the return pipes. When a return pipe is blocked, many return pipes can be screened by the pre-marked colors, without the need to manually mark the unblocked return pipes one by one during inspection.

[0008] Optionally, the dust suction mechanism includes a dust suction box arranged on the top of the furnace cover, a fan fixed at one end of the dust suction box for dust suction, and a dust suction pipe fixed at the other end of the dust suction box and connected to the medium frequency furnace body, and the bottom end of the dust suction pipe is fixed in the furnace cover.

[0009] By adopting the above technical solution and setting up the dust collection mechanism, the smoke generated by the medium frequency furnace can be absorbed to prevent the smoke from spreading in the factory and polluting the working environment.

[0010] Optionally, a plurality of pads are fixedly provided at the top of the furnace cover and the bottom edge of the dust box, the heat exchange tube is fixedly provided in the middle inner side of the dust box, both ends of the heat exchange tube pass through and extend to the outside of the dust box, and a bellows for discharging the smoke sucked by the fan is fixedly provided at one end of the dust box.

[0011] By adopting the above technical solution, the heat exchange pipe can exchange heat with the high-temperature flue gas sucked in the dust collection mechanism to recover and utilize the heat in the flue gas.

[0012] Optionally, the scraping mechanism includes a telescopic part fixedly arranged on the top of the dust collection box, and a scraper slidably arranged between the outer walls of several of the heat exchange tubes, the scraper is fixedly arranged on the bottom end of the telescopic part, a fixing rod is fixedly arranged between the top of the dust collection box and the top end of the telescopic part, and the scraper is located inside the dust collection box.

[0013] By adopting the above technical solution, the scraping mechanism can scrape off the scale attached to the heat exchange tube after a long period of heat exchange, thereby ensuring the heat exchange effect of the heat exchange tube.

[0014] Optionally, a baffle located between the heat exchange tube and the fan is fixedly provided at the bottom of the inner wall of the dust collection box, and a scale collecting box for collecting scale blocked by the baffle is detachably provided at the bottom of the inner wall of the dust collection box.

[0015] By adopting the above technical solution, the scale scraped off can be easily collected by the scale collecting box along with the blocking of the baffle when the furnace cover is opened.

[0016] In summary, the present invention has at least one of the following beneficial effects:

[0017] 1. Through the setting of different color display strips, several return pipes can be marked and the direction of the return pipes can be marked. When a return pipe is blocked, many return pipes can be screened by the pre-marked colors. There is no need to manually mark the unblocked return pipes one by one during inspection, which is convenient for staff to carry out maintenance, reduces the consumption of staff maintenance time, and shortens downtime.

[0018] 2. Through the setting of the dust suction mechanism, the smoke generated by the medium frequency furnace can be absorbed to prevent the smoke from spreading in the factory and polluting the working environment. The heat exchange tube can exchange heat with the high-temperature smoke sucked in the dust suction mechanism to recycle the heat in the smoke. The scraping mechanism can scrape off the scale attached to the heat exchange tube after a long period of heat exchange to ensure the heat exchange effect of the heat exchange tube. When the furnace cover is opened, the scraped scale is easily blocked by the baffle and collected by the scale collecting box, reducing the intensity of people's cleaning in the dust suction mechanism in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a diagram of the internal connection between the furnace cover, the dust collection box and the bellows of the utility model;

[0021] Figure 3 This is a bottom-up connection diagram of the heat exchange tube and the scraper of the utility model.

[0022] Explanation of the reference numerals: 1. medium frequency furnace body; 11. return water pipe; 12. color developing strip; 2. furnace cover; 3. dust collecting box; 31. fan; 32. dust collecting pipe; 33. bellows; 34. pad rod; 4. heat exchange tube; 5. scraper; 51. telescopic part; 52. fixing rod; 6. baffle; 61. dirt collecting box. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-3 The utility model is described in further detail.

[0024] The utility model embodiment discloses a medium frequency furnace, referring to Figure 1 , including an intermediate frequency furnace body 1, a furnace cover 2 rotatably arranged on the top of the intermediate frequency furnace body 1, and a plurality of return pipes 11 fixedly arranged on one side of the intermediate frequency furnace body 1. The intermediate frequency furnace body 1 and the furnace cover 2 constitute an existing intermediate frequency furnace, and its internal structure has been disclosed and will not be described in detail here. The furnace cover 2 can be rotated within a certain range on the intermediate frequency furnace body 1, so that people can add materials into the intermediate frequency furnace body 1 for heating after opening the furnace cover 2. The return pipe 11 can be a hose, and the return pipe 11 can discharge the return water after cooling and heat exchange in the intermediate frequency furnace body 1, which is a public technology.

[0025] Reference Figure 1 The outer walls of several return pipes 11 are respectively fixed with color display strips 12 of different colors. The color display strips 12 are arranged along the length direction of the return pipes 11. The color display strips 12 of different colors can mark several return pipes 11 separately and mark the direction of the return pipes. The color display strips 12 can be red, orange, yellow, green, cyan, blue, purple and other colors.

[0026] Reference Figure 1-2A dust suction mechanism for sucking dust from the intermediate frequency furnace body 1 is provided on the top of the furnace cover 2. The dust suction mechanism includes a dust suction box 3 provided on the top of the furnace cover 2, a fan 31 fixed at one end of the dust suction box 3 for dust suction, and a dust suction pipe 32 fixed at the other end of the dust suction box 3 and communicating with the intermediate frequency furnace body 1. The bottom end of the dust suction pipe 32 is fixed in the furnace cover 2. The fan 31 can be a fan with a suction effect such as a negative pressure fan and an exhaust fan. After the fan 31 is running, the dust in the intermediate frequency furnace body 1 can be sucked into the dust suction box 3 through the dust suction pipe 32.

[0027] Reference Figure 1-2 A plurality of pad rods 34 are fixedly provided at the top of the furnace cover 2 and the bottom edge of the dust collection box 3. The pad rods 34 can connect the furnace cover 2 and the dust collection box 3 and raise the dust collection box 3.

[0028] Reference Figure 1-2 A bellows 33 is fixedly provided at one end of the dust box 3 for discharging the smoke sucked by the fan 31. The bellows 33 can be a metal bellows. The bellows 33 can discharge the smoke sucked by the fan 31 into the existing high-temperature smoke treatment equipment, perform subsequent treatment on the smoke, and reduce environmental pollution.

[0029] Reference Figure 1-2 A heat exchange tube 4 for exchanging heat with high-temperature smoke is provided in the dust collection mechanism. The heat exchange tube 4 is fixedly arranged in the middle of the inner side of the dust collection box 3. Both ends of the heat exchange tube 4 penetrate and extend to the outside of the dust collection box 3. The high-temperature smoke sucked into the dust collection box 3 can exchange heat with the heat exchange tube 4 to recycle the heat in the smoke.

[0030] Reference Figure 1-3 A scraping mechanism for scraping off scale generated by heat exchange on the outer surface of the heat exchange tube 4 is provided on the top of the dust collection mechanism. The scraping mechanism includes a telescopic member 51 fixedly arranged on the top of the dust collection box 3, and a scraper 5 slidably arranged between the outer walls of several heat exchange tubes 4. The scraper 5 is fixedly arranged at the bottom end of the telescopic member 51. The telescopic member 51 can be an object with a telescopic effect such as an electric push rod, a cylinder, and a hydraulic cylinder. After the telescopic member 51 is extended and retracted, it will drive the scraper 5 to slide on the outer walls of several heat exchange tubes 4, thereby scraping off scale attached to the heat exchange tube 4 after a long period of heat exchange, thereby ensuring the heat exchange effect of the heat exchange tube 4.

[0031] Reference Figure 1-2 A fixing rod 52 is fixed between the top of the dust box 3 and the top of the telescopic member 51. The fixing rod 52 is in an "L" shape. The fixing rod 52 can connect the dust box 3 and the telescopic member 51, and support the telescopic member 51 and other components. The scraper 5 is located inside the dust box 3, which is convenient for the scraper 5 to rise and fall and slide inside the dust box 3.

[0032] Reference Figure 1-2A baffle 6 located between the heat exchange tube 4 and the fan 31 is fixedly provided at the bottom of the inner wall of the dust box 3. A scale collecting box 61 for collecting the scale blocked by the baffle 6 can be detachably installed at the bottom of the inner wall of the dust box 3. The scale collecting box 61 is installed at the bottom of the dust box 3 by means of screw connection, etc. When the furnace cover 2 is opened, the furnace cover 2 will rotate in a small range around the top of the intermediate frequency furnace body 1. At this time, the structure scraped off by the scraper 5 will slide toward the baffle 6 with gravity. The sliding scale will fall into the scale collecting box 61 and be collected under the obstruction of the baffle 6. People can remove the scale collecting box 61 later to centrally remove the collected scale.

[0033] The implementation principle of a medium frequency furnace in the embodiment of the utility model is:

[0034] When a return pipe 11 is blocked, people can check the return pipes 11 one by one, and screen the return pipes 11 one by one by observing the color of the color strip 12 on the outer surface of the return pipe 11 that is not blocked after the inspection, so as to find the blocked return pipe 11. When checking, there is no need to manually mark the unblocked return pipes 11 one by one, which reduces the maintenance time of the staff and shortens the downtime;

[0035] After the fan 31 is running, the smoke in the medium frequency furnace body 1 can be sucked into the dust box 3 through the dust collection pipe 32 to prevent the smoke from spreading in the factory and polluting the working environment. The high-temperature smoke sucked into the dust collection box 3 can exchange heat with the heat exchange tube 4 to recycle the heat in the smoke. After the telescopic member 51 is extended and retracted, it will drive the scraper 5 to slide on the outer wall of several heat exchange tubes 4, thereby scraping off the scale attached to the heat exchange tube 4 after a long period of heat exchange, ensuring the heat exchange effect of the heat exchange tube 4;

[0036] When the furnace cover 2 is opened, the furnace cover 2 will rotate in a small range around the top of the medium frequency furnace body 1. At this time, the structure scraped off by the scraper 5 will slide toward the baffle 6 due to gravity. The sliding scale will fall into the scale collecting box 61 and be collected under the obstruction of the baffle 6. People can remove the scale collecting box 61 later to centrally remove the collected scale.

[0037] The above description 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 above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An intermediate frequency furnace, comprising an intermediate frequency furnace body (1), a furnace cover (2) rotatably arranged on the top of the intermediate frequency furnace body (1), and a plurality of return pipes (11) fixedly arranged on one side of the intermediate frequency furnace body (1), characterized in that: The outer walls of the plurality of return water pipes (11) are respectively fixedly provided with color display strips (12) of different colors, the top of the furnace cover (2) is provided with a dust suction mechanism for sucking smoke and dust in the medium frequency furnace body (1), the dust suction mechanism is provided with a heat exchange tube (4) for exchanging heat with the high-temperature smoke and dust, and the top of the dust suction mechanism is provided with a scraping mechanism for scraping off scale generated by heat exchange on the outer surface of the heat exchange tube (4).

2. The medium frequency furnace according to claim 1, characterized in that: The dust collection mechanism comprises a dust collection box (3) arranged on the top of the furnace cover (2), a fan (31) fixedly arranged at one end of the dust collection box (3) and used for dust collection, and a dust collection pipe (32) fixedly arranged at the other end of the dust collection box (3) and communicating with the medium frequency furnace body (1), wherein the bottom end of the dust collection pipe (32) is fixedly arranged in the furnace cover (2).

3. A medium frequency furnace according to claim 2, characterized in that: A plurality of pad rods (34) are fixedly provided at the top of the furnace cover (2) and the bottom edge of the dust collection box (3).

4. The medium frequency furnace according to claim 3, characterized in that: The heat exchange tube (4) is fixedly arranged in the middle of the inner side of the dust collection box (3), and both ends of the heat exchange tube (4) penetrate and extend to the outside of the dust collection box (3).

5. The medium frequency furnace according to claim 4, characterized in that: A bellows (33) for discharging smoke sucked by the fan (31) is fixedly provided at one end of the dust collection box (3).

6. The medium frequency furnace according to claim 1, characterized in that: The scraping mechanism comprises a telescopic member (51) fixedly arranged on the top of the dust collection box (3), and a scraper (5) slidably arranged between the outer walls of a plurality of the heat exchange tubes (4), wherein the scraper (5) is fixedly arranged on the bottom end of the telescopic member (51).

7. The medium frequency furnace according to claim 6, characterized in that: A fixing rod (52) is fixedly provided between the top of the dust collection box (3) and the top of the telescopic member (51), and the scraper (5) is located inside the dust collection box (3).

8. The medium frequency furnace according to claim 7, characterized in that: A baffle (6) located between the heat exchange tube (4) and the fan (31) is fixedly provided at the bottom of the inner wall of the dust collection box (3), and a scale collection box (61) for collecting scale blocked by the baffle (6) is detachably provided at the bottom of the inner wall of the dust collection box (3).

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