A high speed steel convection cooling annealing tube

Abstract

The utility model relates to the technical field of high-speed steel annealing, and specifically to a high-speed steel convection cooling annealing tube. The technical scheme is as follows: it comprises a push rod, a cooling tube and a combustion chamber, one end of the push rod is connected with a high-speed steel drill bit, the push rod can be inserted into the cooling tube and drive the high-speed steel drill bit to be inserted into the combustion chamber from a circular hole at one end of the cooling tube seal. The beneficial effects of the utility model are as follows: the thermal insulation performance of the combustion chamber is improved by an inner interlayer arranged in the combustion chamber, and the high-speed steel drill bit is evenly calcined from all sides through gas holes arranged around the inner wall of the inner interlayer, so as to solve the problem that the thermal insulation performance of a traditional combustion furnace is poor, a large amount of fuel needs to be continuously input to maintain the temperature in the furnace, resulting in a large amount of fuel use, resulting in high energy consumption, which is not conducive to energy conservation and emission reduction, and the flame direction in the traditional combustion furnace is relatively single, which is not conducive to the uniform increase of the temperature in the furnace and is prone to uneven heating of the high-speed steel drill bit.

Description

Technical Field

[0001] The utility model relates to the technical field of high-speed steel annealing, in particular to a high-speed steel convection cooling annealing tube. Background Art

[0002] High-speed steel is a special alloy steel with excellent hardness, wear resistance and heat resistance. It is mainly used to manufacture cutting tools, such as drills, milling cutters, turning tools, etc. High-speed steel drills may lose their hardness and cutting performance due to high temperature, wear and other factors during use. At this time, their performance can be restored through annealing; Annealing is a heat treatment process that rearranges the grains of the material, reduces internal stress and improves the performance of the material through heating and controlled cooling processes; Annealing plays an important role in protecting and optimizing the performance of the tool, and can restore the hardness and cutting performance of the high-speed steel drill, extend its service life and improve cutting efficiency.

[0003] The prior art has the following deficiencies: in the traditional annealing process, after the high-speed steel drill bit is placed in the furnace and heated to the required temperature, it needs to be maintained for a certain period of time so that the drill bit can be evenly heated as a whole. The traditional combustion furnace is constructed with a single layer of metal material, which has a simple structure, high temperature resistance, and good thermal conductivity, but poor thermal insulation performance. Therefore, when the furnace is heated to the specified temperature, a large amount of fuel needs to be continuously input to maintain the temperature in the furnace. Therefore, in the annealing process, due to the poor thermal insulation performance of the combustion furnace, a large amount of fuel is used, resulting in high energy consumption, which is not conducive to energy conservation and emission reduction. In addition, the flame direction in the traditional combustion furnace is relatively single, which is not conducive to the uniform increase of the temperature in the furnace, and it is easy to cause the problem of uneven heating of the high-speed steel drill bit.

[0004] Therefore, it is necessary to invent a high-speed steel convection cooling annealing tube. Utility Model Content

[0005] To this end, the utility model provides a high-speed steel convection cooling annealing tube, which uses a push rod to pass the high-speed steel drill bit through the cooling tube and extend it into the combustion chamber for high-temperature calcination. After heating to the required temperature and maintaining it for a period of time, the push rod is pulled to withdraw the high-speed steel drill bit into the cooling tube for cooling, thereby completing the annealing of the high-speed steel drill bit. The thermal insulation performance of the combustion chamber is improved by an inner interlayer arranged in the combustion chamber, and the high-speed steel drill bit is uniformly calcined from all sides through the gas holes arranged around the inner wall of the inner interlayer, so as to solve the problem that the thermal insulation performance of the traditional combustion furnace is poor, and a large amount of fuel needs to be continuously input to maintain the temperature in the furnace, resulting in a large amount of fuel use, resulting in high energy consumption, which is not conducive to energy conservation and emission reduction, and the flame direction in the traditional combustion furnace is relatively single, which is not conducive to the uniform increase of the temperature in the furnace, and it is easy to cause uneven heating of the high-speed steel drill bit.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-speed steel convection cooling annealing tube comprises a push rod, a cooling tube and a combustion chamber, one end of the push rod is connected to a high-speed steel drill bit, and a bracket is arranged around the outer wall of the high-speed steel drill bit, and the bracket is fixedly connected to the bracket, and a sealing ring is fixedly sleeved and installed at one end of the outer wall of the push rod close to the high-speed steel drill bit, one end of the cooling tube is sealed, and one end of the cooling tube seal is inserted and installed on one side of the combustion chamber and extends into the combustion chamber, and one end of the cooling tube seal is provided with a circular hole, and the push rod can be inserted into the cooling tube and drive the high-speed steel drill bit to be inserted into the combustion chamber from the circular hole at one end of the cooling tube seal.

[0007] Preferably, an inner wall of one end of the cooling tube seal is provided with an annular protrusion, and when the high-speed steel drill bit is inserted into the combustion chamber, the sealing ring can be inserted into the inner wall of the annular protrusion and abut against the inner wall of one end of the cooling tube seal.

[0008] Preferably, a hydrogen conduit is inserted into the outer wall of one side of the cooling tube, a sealing plug is inserted into the open end of the cooling tube, a circular hole is arranged at the center of the sealing plug, and the push rod passes through the central circular hole of the sealing plug.

[0009] Preferably, an inner interlayer is provided on the inner wall of the combustion chamber, a gap is provided between the inner interlayer and the combustion chamber, one side of the inner interlayer is fixedly connected to one end of the cooling tube seal, and one end of the cooling tube seal passes through the inner interlayer to the inner wall of the inner interlayer.

[0010] Preferably, a first gas hole is provided at one sealed end of the outer wall of the cooling tube, and a gas supply hole is provided around the outer wall of the cooling tube, and the gas supply hole is provided on the outer wall of the cooling tube between the combustion chamber and the inner interlayer.

[0011] Preferably, an inward protrusion is provided at one end of the inner interlayer away from the cooling pipe, a second gas hole is provided on the surface of the protrusion, and third gas holes are evenly provided around the outer wall of the inner interlayer.

[0012] Preferably, an air intake pipe is provided on one side of the outer wall of the combustion chamber, and the air intake pipe passes through the combustion chamber and the inner interlayer and extends to the inner wall of the inner interlayer. A smoke exhaust pipe is provided on the other side of the outer wall of the combustion chamber, and the smoke exhaust pipe passes through the combustion chamber and the inner interlayer and extends to the inner wall of the inner interlayer.

[0013] Preferably, a heat sink is fixedly mounted on the outer wall of the cooling tube, the heat sink is evenly arranged on the outer wall of the cooling tube, and the heat sink penetrates the outer wall of the cooling tube and extends to the inner side of the cooling tube.

[0014] The beneficial effects of the utility model are as follows: the thermal insulation performance of the combustion chamber is improved by the inner interlayer arranged in the combustion chamber, and the high-speed steel drill bit is evenly calcined from all sides through the gas holes arranged around the inner wall of the inner interlayer, so as to solve the problem that the thermal insulation performance of the traditional combustion furnace is poor, and a large amount of fuel needs to be continuously input to maintain the temperature in the furnace, resulting in a large amount of fuel use, resulting in high energy consumption, which is not conducive to energy conservation and emission reduction; and the flame direction in the traditional combustion furnace is relatively single, which is not conducive to the uniform increase of the temperature in the furnace and easily causes uneven heating of the high-speed steel drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A front view of a high-speed steel convection cooling annealing tube provided by the utility model;

[0016] Figure 2 A schematic diagram of the internal structure of a high-speed steel convection cooling annealing tube provided by the utility model;

[0017] Figure 3 A detailed diagram of a cooling tube and a bracket for a high-speed steel convection cooling annealing tube provided by the utility model;

[0018] Figure 4 A schematic diagram of the calcination state of a high-speed steel drill bit of a high-speed steel convection cooling annealing tube provided by the utility model;

[0019] Figure 5 A schematic diagram of the cooling state of a high-speed steel drill bit in a high-speed steel convection cooling annealing tube provided by the utility model.

[0020] In the figure: cooling tube 11, annular protrusion 12, heat sink 13, sealing plug 14, hydrogen conduit 15, gas delivery hole 16, first gas hole 17, thrust rod 21, sealing ring 22, bracket 23, high-speed steel drill bit 24, combustion chamber 31, inner interlayer 32, protrusion 33, second gas hole 34, third gas hole 35, air inlet pipe 36, exhaust pipe 37. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. Example 1

[0022] like Figure 1-Figure 3As shown, a high-speed steel convection cooling annealing tube in an embodiment of the first aspect of the utility model includes a push rod 21, a cooling tube 11 and a combustion chamber 31, one end of the push rod 21 is connected to a high-speed steel drill bit 24, and a bracket 23 is arranged around the outer wall of the high-speed steel drill bit 24, and the bracket 23 is fixedly connected to the bracket 23, and a sealing ring 22 is fixedly installed on one end of the outer wall of the push rod 21 close to the high-speed steel drill bit 24, one end of the cooling tube 11 is sealed, and the sealed end of the cooling tube 11 is inserted and installed on one side of the combustion chamber 31 and extends into the combustion chamber 31, and a circular hole is arranged at the sealed end of the cooling tube 11, and the push rod 21 can be inserted into the cooling tube 11 and drive the high-speed steel drill bit 24 to be inserted into the combustion chamber 31 from the circular hole at the sealed end of the cooling tube 11.

[0023] In the above embodiment, it should be noted that the bracket 23 is made of high-temperature resistant metal and can withstand the high temperature in the combustion chamber 31. The push rod 21 is also made of high-temperature resistant metal. The connecting end of the high-speed steel drill bit 24 is provided with a groove of a special shape. The end of the push rod 21 is provided with a protrusion that can match the groove of the high-speed steel drill bit 24. The high-speed steel drill bit 24 is inserted and fixed at the end of the push rod 21 and assisted by the bracket 23 to achieve the effect of fixing the high-speed steel drill bit 24 at the end of the push rod 21. The high-speed steel drill bit 24 is passed through the cooling pipe 11 and extended into the combustion chamber 31 through the push rod 21 for high-temperature calcination. After heating to the required temperature and maintaining it for a period of time, the push rod 21 is pulled to withdraw the high-speed steel drill bit 24 into the cooling pipe 11 for cooling, so as to achieve the effect of annealing the high-speed steel drill bit. Example 2

[0024] like Figure 1-Figure 5 As shown, a high-speed steel convection cooling annealing tube includes all the contents of Example 1. In addition, an annular protrusion 12 is provided on the inner wall of the sealed end of the cooling tube 11. When the high-speed steel drill bit 24 is inserted into the combustion chamber 31, the sealing ring 22 can be inserted into the inner wall of the annular protrusion 12 and abut against the inner wall of the sealed end of the cooling tube 11. A hydrogen conduit 15 is inserted into the outer wall of one side of the cooling tube 11. A sealing plug 14 is inserted into the open end of the cooling tube 11. A circular hole is provided in the center of the sealing plug 14, and the push rod 21 passes through the central circular hole of the sealing plug 14.

[0025] In the above embodiment, it should be noted that the annular protrusion 12 and the sealing ring 22 are both made of rubber. When the sealing ring 22 is inserted into the annular protrusion 12, the opening at the sealing end of the cooling tube 11 can be sealed. The sealing plug 14 is made of rubber. During use, the push rod 21 and the high-speed steel drill bit 24 are first inserted into the cooling tube 11, and then the sealing plug 14 is sleeved on the outer wall of the push rod 21 from the end of the push rod 21 away from the high-speed steel drill bit 24 and inserted into the open end of the cooling tube 11 to seal the open end of the cooling tube 11. The hydrogen conduit 15 is connected to the hydrogen tank, and hydrogen can be input into the cooling tube 11 through the hydrogen conduit 15. Injecting hydrogen into the cooling tube 11 first can protect the high-speed steel, so as to prevent the high-speed steel drill bit 24 from being oxidized in the cooling stage after entering the cooling tube 11 after being calcined in the combustion chamber 31. Example 3

[0026] like Figure 1-Figure 5 As shown, a high-speed steel convection cooling annealing tube includes all the contents of Example 2, in addition, the inner wall of the combustion chamber 31 is provided with an inner interlayer 32, a gap is provided between the inner interlayer 32 and the combustion chamber 31, one side of the inner interlayer 32 is fixedly connected to the sealed end of the cooling tube 11, the sealed end of the cooling tube 11 passes through the inner interlayer 32 to the inner wall of the inner interlayer 32, the sealed end of the outer wall of the cooling tube 11 is provided with a first gas hole 17, the outer wall of the cooling tube 11 is surrounded by a gas delivery hole 16, and the gas delivery hole 16 is provided between the combustion chamber 31 and the inner interlayer The outer wall of the cooling tube 11 between the inner interlayer 32, the inner interlayer 32 is provided with an inward protrusion 33 at one end away from the cooling tube 11, and the second combustion hole 34 is provided on the surface of the protrusion 33, and the third combustion holes 35 are evenly arranged around the outer wall of the inner interlayer 32, an air intake pipe 36 is provided on one side of the outer wall of the combustion chamber 31, and the air intake pipe 36 extends through the combustion chamber 31 and the inner interlayer 32 to the inner wall of the inner interlayer 32, and a smoke exhaust pipe 37 is provided on the other side of the outer wall of the combustion chamber 31, and the smoke exhaust pipe 37 extends through the combustion chamber 31 and the inner interlayer 32 to the inner wall of the inner interlayer 32.

[0027] In the above embodiment, it should be noted that the hydrogen in the cooling tube 11 enters between the inner interlayer 32 and the combustion chamber 31 through the gas supply hole 16. Since there is no oxygen between the inner interlayer 32 and the combustion chamber 31, the hydrogen between the inner interlayer 32 and the combustion chamber 31 will not burn. An igniter is provided on the inner wall of the inner interlayer 32, and oxygen is input into the inner interlayer 32 through the air intake pipe 36. Then the hydrogen between the inner interlayer 32 and the combustion chamber 31 enters the inner interlayer 32 along the first gas hole 17, the second gas hole 34 and the third gas hole 35, and is ignited by the igniter, so as to achieve the effect of uniformly calcining the high-speed steel drill bit 24 in the inner interlayer 32. At the same time, the exhaust pipe 37 discharges the combustion exhaust gas, and the heat conduction in the inner interlayer 32 is isolated through the gap between the inner interlayer 32 and the combustion chamber 31 and the hydrogen in the gap, thereby improving the thermal insulation performance of the inner interlayer 32 and the combustion chamber 31, so as to achieve the effect of reducing hydrogen input and saving energy. Example 4

[0028] like Figure 2-Figure 5 As shown, a high-speed steel convection cooling annealing tube includes all the contents of Example 1. In addition, a heat sink 13 is fixedly installed on the outer wall of the cooling tube 11, and the heat sink 13 is evenly arranged on the outer wall of the cooling tube 11. The heat sink 13 penetrates the outer wall of the cooling tube 11 and extends to the inner side of the cooling tube 11.

[0029] In the above embodiment, it should be noted that the heat sink 13 is made of metal material with good thermal conductivity. After the high-speed steel drill bit 24 is heated to the required temperature and maintained for a period of time, the hydrogen supply is stopped and the calcination is ended. The high-speed steel drill bit 24 is retracted into the cooling tube 11 by pulling the thrust rod 21, and heat is conducted through the heat sink 13 to achieve the effect of cooling the high-speed steel drill bit 24.

[0030] The use process of the utility model is as follows: a person skilled in the art installs a high-speed steel drill bit 24 at the end of the push rod 21 and fixes it with the aid of a bracket 23, then uses the push rod 21 to pass the high-speed steel drill bit 24 through the cooling tube 11 and extends it into the combustion chamber 31, and at the same time, the sealing ring 22 is inserted into the annular protrusion 12 to seal the opening of the sealing end of the cooling tube 11, and then the sealing plug 14 is sleeved on the outer wall of the push rod 21 from the end of the push rod 21 away from the high-speed steel drill bit 24 and inserted into the open end of the cooling tube 11 to seal the open end of the cooling tube 11, and hydrogen is first injected into the cooling tube 11 through the hydrogen conduit 15, and the hydrogen in the cooling tube 11 is passed through the hydrogen conduit 15. The high-speed steel drill bit 24 in the inner interlayer 32 is uniformly calcined. At the same time, the exhaust pipe 37 discharges the combustion exhaust gas. After the high-speed steel drill bit 24 is heated to the required temperature and maintained for a period of time, the hydrogen supply is stopped and the calcination is terminated. The high-speed steel drill bit 24 is retracted into the cooling tube 11 by pulling the thrust rod 21, and the heat is conducted through the heat sink 13 to cool the high-speed steel drill bit 24.

[0031] The above is only a preferred embodiment of the utility model. Any person skilled in the art may modify the utility model by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the utility model shall fall within the scope of protection claimed by the utility model.

Claims

1. A high-speed steel convection cooling annealing tube, comprising a propulsion rod (21), a cooling tube (11) and a combustion chamber (31), characterized in that: One end of the push rod (21) is connected to a high-speed steel drill bit (24), and brackets (23) are arranged around the outer wall of the high-speed steel drill bit (24). The brackets (23) are fixedly connected to the brackets (23). One end of the outer wall of the push rod (21) close to the high-speed steel drill bit (24) is fixedly sleeved with a sealing ring (22). One end of the cooling tube (11) is sealed, and the sealed end of the cooling tube (11) is inserted and installed on one side of the combustion chamber (31) and extends into the combustion chamber (31). A circular hole is arranged at the sealed end of the cooling tube (11). The push rod (21) can be inserted into the cooling tube (11) and drive the high-speed steel drill bit (24) to be inserted into the combustion chamber (31) from the circular hole at the sealed end of the cooling tube (11).

2. A high speed steel convection cooling annealing tube according to claim 1, characterized in that: An annular protrusion (12) is provided on the inner wall of the sealed end of the cooling tube (11); when the high-speed steel drill bit (24) is inserted into the combustion chamber (31), the sealing ring (22) can be inserted into the inner wall of the annular protrusion (12) and abut against the inner wall of the sealed end of the cooling tube (11).

3. The high speed steel convection cooling annealing tube according to claim 1, characterized in that: A hydrogen conduit (15) is inserted into the outer wall of one side of the cooling tube (11), a sealing plug (14) is inserted into the open end of the cooling tube (11), a circular hole is provided at the center of the sealing plug (14), and the propulsion rod (21) passes through the central circular hole of the sealing plug (14).

4. A high speed steel convection cooling annealing tube according to claim 3, characterized in that: An inner interlayer (32) is provided on the inner wall of the combustion chamber (31), a gap is provided between the inner interlayer (32) and the combustion chamber (31), one side of the inner interlayer (32) is fixedly connected to a sealed end of the cooling tube (11), and the sealed end of the cooling tube (11) passes through the inner interlayer (32) to the inner wall of the inner interlayer (32).

5. A high speed steel convection cooling annealing tube according to claim 4, characterized in that: A first gas hole (17) is provided at one sealed end of the outer wall of the cooling tube (11), and a gas delivery hole (16) is provided around the outer wall of the cooling tube (11). The gas delivery hole (16) is provided on the outer wall of the cooling tube (11) between the combustion chamber (31) and the inner interlayer (32).

6. A high speed steel convection cooling annealing tube according to claim 5, characterized in that: An inward protrusion (33) is provided at one end of the inner interlayer (32) away from the cooling pipe (11), a second gas hole (34) is provided on the surface of the protrusion (33), and third gas holes (35) are evenly provided around the outer wall of the inner interlayer (32).

7. A high speed steel convection cooling annealing tube according to claim 6, characterized in that: An air intake pipe (36) is arranged on one side of the outer wall of the combustion chamber (31), and the air intake pipe (36) penetrates the combustion chamber (31) and the inner interlayer (32) and extends to the inner wall of the inner interlayer (32); a smoke exhaust pipe (37) is arranged on the other side of the outer wall of the combustion chamber (31), and the smoke exhaust pipe (37) penetrates the combustion chamber (31) and the inner interlayer (32) and extends to the inner wall of the inner interlayer (32).

8. The high speed steel convection cooling annealing tube according to claim 1, characterized in that: The outer wall of the cooling tube (11) is fixedly mounted with a heat sink (13); the heat sink (13) is evenly arranged on the outer wall of the cooling tube (11); the heat sink (13) penetrates the outer wall of the cooling tube (11) and extends to the inner side of the cooling tube (11).

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