Drill rod quenching box-type furnace

Abstract

The utility model discloses a drill rod quenching box-type furnace which comprises a furnace body, the furnace body is of a square structure, a furnace door is installed on the furnace body, refractory furnace linings are installed on the inner wall of the furnace body and the inner wall of the furnace door, a hearth is arranged in the middle of the furnace body, a power source is arranged behind the furnace body, a first installation frame is arranged in the furnace body, and the section of the first installation frame is rectangular. The size of the first installation frame is consistent with the section of the hearth, the first installation frame is fixed to the furnace door side of the hearth and tightly attached to the closed furnace door, and an insertion hole and a heating opening are formed in the first installation frame. According to the scheme, an in-furnace heating and quenching mode is adopted, energy consumption can be effectively saved, the temperature can be accurately controlled, and heat waste and unstable quality caused by environment change are avoided.

Description

Technical Field

[0001] The present invention relates to the field of heating and quenching furnaces, and specifically to a drill rod quenching box furnace. Background Art

[0002] Due to its working requirements, the end of the drill rod needs to be heated and quenched to improve its metal strength, hardness and other properties. The existing method of heating the drill rod uses a high-frequency induction heating wire to be wound into a spiral coil, and the end of the drill rod to be heated is inserted into the spiral coil to complete the heating.

[0003] In this heating method, the heating wire is directly exposed to the outside, and the induction coil is generally exposed to the air environment. The heating temperature is easily affected by environmental factors, resulting in defects such as cracks, breakages, and substandard hardness after heating and tempering treatment. In addition to affecting product quality, it directly causes production suspension and even batch scrap, which not only affects production efficiency, but also increases production costs. Utility Model Content

[0004] In order to solve the problems existing in the above-mentioned background technology, the present invention provides a box-type furnace for quenching drill rods.

[0005] A brazing rod quenching box furnace comprises a furnace body, the furnace body is a square structure, a furnace door is installed on the furnace body, the inner walls of the furnace body and the furnace door are equipped with refractory linings, the middle part of the furnace body is a furnace, a power supply is arranged at the rear of the furnace body, a first mounting frame is arranged in the furnace body, the cross-section of the first mounting frame is rectangular, and its size is consistent with the cross-section of the furnace, the first mounting frame is fixed to the furnace door side of the furnace, and is tightly attached to the furnace door after closing, an insertion hole and a heating port are arranged on the first mounting frame, a second mounting frame is also arranged on the inner side of the furnace, a heating rod is arranged on the second mounting frame, the heating rod is inserted from the heating port to the wiring part on the second mounting frame, the wiring part is connected to the power supply on the outside, a thermocouple is also arranged on the furnace body, the thermocouple is inserted into the furnace body from the direction of the power supply, the working end of the thermocouple goes deep into the furnace from the rear side of the furnace body, a tooling hole is arranged on the furnace door, and the tooling hole corresponds to the insertion hole of the first mounting frame.

[0006] Furthermore, the insertion holes on the first mounting frame form a rectangular array, and intervals are provided between the rectangular arrays for arranging heating ports, thereby ultimately forming a structure in which "heating ports-insertion holes" are alternately arranged.

[0007] Furthermore, the main body of the heating rod is a corundum ceramic tube, and the iron-chromium-aluminum heating wire is wound around the outer side of the middle of the corundum ceramic tube. The heating wire is produced by Shougang and has a service life of more than 15 years. It will not age or peel after long-term use, and avoids the conduction and ignition accidents caused by the contact between the iron-chromium-aluminum heating wire and the heat-resistant steel furnace tube after the iron-chromium-aluminum heating wire breaks accidentally.

[0008] Furthermore, the insertion holes are arranged in 1 layer with 10 holes, and 6 layers are arranged, with a total of 60 workstations. This arrangement structure is an efficiency optimization design structure in most cases, taking into account the size of the drill rod and the height of the operator.

[0009] The beneficial effects of this program are as follows:

[0010] 1. The furnace heating and quenching mode can effectively save energy and accurately control the temperature, avoiding heat waste and unstable quality caused by environmental changes.

[0011] 2. The furnace uses a mounting frame to achieve the alternating setting of the heating rod and the brazing rod, which has a higher heating efficiency. If there is a part that needs to be replaced, the first mounting frame or the second mounting frame can be directly replaced, which is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the main internal sectional view of this scheme;

[0013] Figure 2 It is a side internal sectional view of this scheme.

[0014] Furnace body 1, furnace door 2, refractory furnace lining 3, power supply 4, first mounting frame 5, insertion hole 6, heating port 7, second mounting frame 8, heating rod 9, connection point 10, thermocouple 11, working end 12, tooling hole 13, corundum ceramic tube 14, iron-chromium-aluminum heating wire 15. DETAILED DESCRIPTION

[0015] The present solution is described in detail below with reference to the accompanying drawings.

[0016] Combination Figure 1 Figure 2 A brazing rod quenching box furnace comprises a furnace body 1, the furnace body 1 is a square structure, a furnace door 2 is installed on the furnace body 1, the inner wall of the furnace body 1 and the furnace door 2 is equipped with a refractory lining 3, the middle part of the furnace body 1 is a furnace, a power supply 4 is arranged behind the furnace body 1, a first mounting frame 5 is arranged in the furnace body 1, the cross section of the first mounting frame 5 is rectangular, and its size is consistent with the cross section of the furnace, the first mounting frame 5 is fixed to the furnace door 2 side of the furnace, and is in close contact with the furnace door after closing, The first mounting frame 5 is provided with an insertion hole 6 and a heating port 7, and a second mounting frame 8 is also provided on the inner side of the furnace chamber, and a heating rod 9 is provided on the second mounting frame 8. The heating rod 9 is inserted from the heating port 7 to the wiring point 10 on the second mounting frame 8, and the wiring point 10 is connected to the power supply 4 on the outside. A thermocouple 11 is also provided on the furnace body 1, and the thermocouple 11 is inserted into the furnace body 1 from the power supply direction. The working end 12 of the thermocouple extends into the furnace chamber from the rear side of the furnace body 1. A tooling hole 13 is provided on the furnace door 2, and the tooling hole 13 corresponds to the insertion hole of the first mounting frame 5.

[0017] The insertion holes 6 on the first mounting frame 5 form a rectangular array, and intervals are provided between the rectangular arrays for arranging heating ports.

[0018] The main body of the heating rod 9 is a corundum ceramic tube 14, and an iron-chromium-aluminum heating wire 15 is wound around the middle outer side of the corundum ceramic tube 14. The heating wire is made of Shougang and has a service life of more than 15 years. It will not age or peel after long-term use, and avoids the conduction and ignition accidents caused by the iron-chromium-aluminum heating wire accidentally breaking and contacting with the heat-resistant steel furnace tube.

[0019] The insertion holes 13 are arranged in six layers, with ten holes forming one layer, and a total of sixty workstations. This arrangement structure is an efficiency-optimized design structure in most cases, in combination with the size of the drill rod and the height of the operator.

[0020] The working principle of this scheme is as follows:

[0021] First, open the furnace door 1 and take out the first mounting frame 5, insert one end of the heating rod 9 into the connection point 10 of the second mounting frame 8, then put it into the first mounting frame 5, and put the other end of the heating rod 9 into the heating port 7. Because the heating rod 9 is only provided with the iron-chromium-aluminum heating wire 15 in the middle, the iron-chromium-aluminum heating wire does not contact the first mounting frame and the second mounting frame. Then close the furnace door and start heating.

[0022] The end of the brazing rod 16 to be quenched is inserted into the furnace through the tooling hole of the furnace door 2. Since the first mounting frame 5 and the furnace door 2 have a certain thickness, the brazing rod 16 is horizontally supported by the channel formed by the tooling hole and the insertion hole, and its head is deeply inside the furnace body. Then the heating rod 9 starts to work, the temperature in the furnace rises, and the power is adjusted according to the temperature data fed back by the thermocouple 11. The brazing rods 16 to be quenched are inserted and pulled out in turn.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A box-type furnace for quenching a drill rod, comprising a furnace body, the furnace body is a square structure, a furnace door is installed on the furnace body, the inner wall of the furnace body and the furnace door is equipped with a refractory lining, the middle part of the furnace body is a furnace, and a power supply is provided at the rear of the furnace body, characterized in that: A first mounting frame is provided in the furnace body. The first mounting frame has a rectangular cross section, and its size is consistent with the cross section of the furnace. The first mounting frame is fixed to the furnace door side of the furnace and is tightly attached to the closed furnace door. An insertion hole and a heating port are provided on the first mounting frame. A second mounting bracket is also provided on the inner side of the furnace chamber, and a heating rod is provided on the second mounting bracket. The heating rod is inserted from the heating port to the wiring point on the second mounting bracket, and the wiring point is connected to the power supply on the outside. A thermocouple is also provided on the furnace body, and the thermocouple is inserted into the furnace body from the direction of the power supply. The working end of the thermocouple extends into the furnace chamber from the rear side of the furnace body. A tooling hole is provided on the furnace door, and the tooling hole corresponds to the insertion hole of the first mounting bracket.

2. A drill rod quenching box furnace as claimed in claim 1, characterized in that: The insertion holes on the first mounting frame form a rectangular array, and intervals are provided between the rectangular arrays for arranging heating ports.

3. A drill rod quenching box furnace as claimed in claim 1, characterized in that: The main body of the heating rod is a corundum ceramic tube, and an iron-chromium-aluminum heating wire is wound around the outer side of the middle part of the corundum ceramic tube.

4. A drill rod quenching box furnace as claimed in claim 2, characterized in that: The insertion holes constitute one layer with 10 holes, and 6 layers are arranged, with a total of 60 workstations.

Images