CN218291040U

CN218291040U - Heat treatment device for gear machining

Info

Publication number: CN218291040U
Application number: CN202222456262.1U
Authority: CN
Inventors: 胡鸣尚; 王永旭; 闫伟刚
Original assignee: Henan Gaojing Gear Co ltd
Current assignee: Henan Gaojing Gear Co ltd
Priority date: 2022-09-16
Filing date: 2022-09-16
Publication date: 2023-01-13
Anticipated expiration: 2032-09-16

Abstract

The utility model relates to a heat treatment device for gear processing, which comprises a heat treatment box, a quenching box, a gear placing rack, a lifting mechanism and a waste gas treatment device; the waste gas treatment device comprises a cooling box, a spraying dust removal box and an active carbon filter box which are mutually communicated, wherein one side of the lower part of the active carbon filter box is communicated with a centrifugal fan; the top intercommunication of cooler bin has the cold source admission pipe, the bottom intercommunication of cooler bin has the cold source discharge pipe, the inside snakelike cooling tube that is provided with of cooler bin, the bottom of snakelike cooling tube extends to the outside one side of cooler bin and deviates from the one end body coupling of thermal treatment case with first connecting pipe, the top of snakelike cooling tube extends to the outside opposite side of cooler bin and deviates from the one end body coupling that sprays the dust removal case with the second connecting pipe, be fixed with radiating fin on the outer wall of snakelike cooling tube. Earlier cool down the processing to waste gas before the purification, reduce the degree of high-temperature gas to the inside damage of heat treatment device, waste gas purification treatment is efficient, effectual.

Description

Heat treatment device for gear machining

Technical Field

The utility model belongs to the technical field of equipment for the gear machining, especially, relate to a heat treatment device for gear machining.

Background

The heat treatment process in the gear machining process is to heat the gear workpiece to a temperature near or above its critical temperature for a specified period of time, and then cool the heated gear workpiece in a medium, which may be air, water or molten salt. The heat treatment process of the gear comprises annealing, surface hardening, tempering, normalizing and quenching, nitriding, cyaniding and the like. The heat treatment process of the gear has an important influence on physical properties such as surface hardness of the gear workpiece. The quenching process is an important step in the heat treatment process of gear workpieces, and the quenching oil fume exhaust gas caused by the quenching process gradually becomes one of the atmospheric heavy pollution sources. When the workpiece is quenched in the oil groove, the workpiece generally causes short-time ignition on the surface of the oil groove and is accompanied with a large amount of oil smoke, so that unsafe factors exist in the production process. The traditional oil quenching tank is generally open, and no equipment for effectively collecting and treating smoke is installed, so that a large amount of oil vapor and smoke generated by quenching are dispersed in a workshop, the environment is polluted, and the physical health of operators is damaged. In order to improve the environmental awareness and ensure the physical health of workers operating in a workshop, some heat treatment equipment for gear machining capable of collecting quenching oil fume and waste gas is also available at present, as described in patent document CN 208121142U. This patent document discloses a thermal treatment equipment for motor transmission gear utilizes the air exhauster to take the flue gas out from the treatment tank, is provided with the filter screen in the outlet duct, filters the large granule impurity in the flue gas earlier, adds to have a quantitative alkali lye in the liquid storage tank, then utilizes the spray plate to spray the flue gas, carries out reaction treatment to the harmful substance in the flue gas, and the flue gas after finally will handling is discharged. Although this equipment for heat treatment can realize the collection purification to quenching oil smoke waste gas, but because the temperature of quenching oil smoke waste gas is very high, the waste gas of handling incasement portion production does not cool down the operation before getting into the outlet duct, high temperature waste gas directly gets into through the outlet duct and sprays incasement portion, not only cause the harm to outlet duct and spray case easily, and only purify the dust removal through the pure mode of spraying, purifying effect is poor, the gas of handling still can not reach emission standard, can not be fine satisfy the user demand, it is inconvenient to popularize and apply in actual production.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a heat treatment device for gear machining for the heat treatment device for gear machining who solves among the prior art exists poor, the impaired serious technical problem of purifier in the use to the purification treatment effect of quenching oil smoke waste gas.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the heat treatment device for gear machining comprises a heat treatment box which is hollow inside, a quenching box with an open top end is arranged below the inside of the heat treatment box, quenching liquid is contained in the quenching box, a gear placing frame is arranged in the heat treatment box above the quenching box, a lifting mechanism for driving the gear placing frame to lift is arranged above the inside of the heat treatment box, and a waste gas treatment device is arranged on one side of the heat treatment box; the waste gas treatment device comprises a cooling box, a spraying dust removal box and an active carbon filter box which are sequentially arranged at intervals, wherein a first connecting pipe is communicated between the upper part of the heat treatment box and the lower part of the cooling box, a second connecting pipe is communicated between the upper part of the cooling box and the lower part of the spraying dust removal box, a third connecting pipe is communicated between the upper part of the spraying dust removal box and the upper part of the active carbon filter box, a centrifugal fan is fixed on one side of the lower part of the active carbon filter box, an air outlet pipe is communicated between the lower part of the active carbon filter box and the air inlet end of the centrifugal fan, and the air outlet end of the centrifugal fan is communicated with an exhaust pipe; the inside cavity setting of cooler bin, the top intercommunication of cooler bin has the cold source admission pipe, the bottom intercommunication of cooler bin has the cold source discharge pipe, the inside snakelike cooling tube that is provided with of cooler bin, the bottom of snakelike cooling tube extends to the outside one side of cooler bin and deviates from the one end body coupling of thermal treatment case with first connecting pipe, the top of snakelike cooling tube extends to the outside opposite side of cooler bin and deviates from the one end body coupling that sprays the dust removal case with the second connecting pipe, be fixed with the radiating fin that a plurality of even intervals set up on the outer wall of snakelike cooling tube.

Preferably, the lifting mechanism comprises a threaded rod rotatably connected above the inside of the heat treatment box, one end of the threaded rod extends to the outside of the heat treatment box and is fixed with a crank, two threads with opposite turning directions are arranged on the threaded rod, two movable sleeves with two intervals are respectively in threaded connection with the outside of the two threads with opposite turning directions, a guide rod with a horizontal setting is fixed inside the heat treatment box above the threaded rod, the upper part of each movable sleeve penetrates through the guide rod and is in sliding connection with the guide rod, an X-shaped hinged rod is arranged between the bottoms of the two movable sleeves and comprises a front hinged rod and a rear hinged rod, the middle position of the front hinged rod is hinged with the middle position of the rear hinged rod through a hinged bolt and a hinged nut, the top end of the front hinged rod and the top end of the rear hinged rod are respectively hinged with the bottoms of the two movable sleeves, a horizontally arranged slide rod is fixed at the top of the gear rack, two sliders with two intervals are in sliding connection with the outside of the slide rod, and the bottom end of the front hinged rod and the bottom end of the rear hinged rod are respectively hinged with the tops of the two sliders.

Preferably, a horizontal partition plate horizontally arranged is fixed below the spraying and dust removing box, water inlet holes are formed in the horizontal partition plate, the horizontal partition plate divides the spraying and dust removing box into two independent cavities, namely a spraying cavity positioned above and a water storage cavity positioned below, a water inlet pipe communicated with the water storage cavity is fixed on one side of the lower portion of the spraying and dust removing box, a water outlet pipe communicated with the water storage cavity is fixed at the bottom of the spraying and dust removing box, one end of a second connecting pipe is communicated with one side of the lower portion of the spraying cavity, one end of a third connecting pipe is communicated with one side of the upper portion of the spraying cavity, a booster water pump is installed on the outer side of the lower portion of the spraying and dust removing box, the water inlet end of the booster water pump is communicated with the water storage cavity through a water pipe, a water spraying pipe extending upwards is communicated with the top of the water spraying pipe through a corner two-way connecting pipe, one end of the spraying pipe, which deviates from the water spraying pipe, is sealed and extends to the upper portion inside of the spraying cavity, and the bottom of the spraying pipe positioned inside the spraying pipe is communicated with a plurality of spraying heads uniformly arranged at intervals along the length direction of the spraying pipe.

Preferably, a first filter screen horizontally arranged is fixed in the spraying cavity above the spraying pipe, the first filter screen is positioned below the joint of the third connecting pipe and the spraying dust removal box, and a second filter screen horizontally arranged is fixed in the spraying cavity above the transverse partition plate.

Preferably, the inside of active carbon rose box is fixed with the vertical division board that a plurality of even intervals set up, the bleeder vent has all been seted up on every vertical division board, two adjacent bleeder vents crisscross setting from top to bottom, all can dismantle the fixed plate that is connected with the level and sets up between the upper portion of two adjacent vertical division boards and between the inner wall of vertical division board and active carbon rose box, the bottom of fixed plate is fixed with the nylon rope that many even intervals set up, be fixed with the active carbon cassette that a plurality of even intervals set up along its length direction on the nylon rope.

Preferably, both ends at gear rack top all rotate and are connected with the leading wheel, and the leading wheel rolls with the inner wall of thermal treatment case and is connected.

The utility model has the advantages that: (1) The waste gas purification device is reasonable in structural design and convenient to install and use, the cooling box, the spraying dust removal box and the activated carbon filter box are sequentially arranged on one side of the heat treatment box, the cooling box is firstly utilized to cool the waste gas before the waste gas is purified, the damage degree of high-temperature gas to the interior of the heat treatment device is reduced, the service life of the device is prolonged, and after the cooling and spraying dust removal operations are sequentially carried out, the activated carbon filter box is utilized to adsorb and purify harmful substances in the waste gas, so that the waste gas purification device is high in efficiency, good in effect and strong in practicability, can well meet the use requirement, and is convenient to popularize and apply; (2) Through setting up elevating system, utilize elevating system to drive gear rack along vertical direction motion, and then realize the purpose of gear rack automatic rising, need not artifical handheld clamp and place the gear and quench the incasement portion and carry out the quenching operation, it is easy and simple to handle, improve the efficiency of production and processing.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view showing the connection between the heat treatment tank and the cooling tank;

FIG. 3 is a schematic structural diagram of the connection of a spraying dust removal box and an activated carbon filter box;

fig. 4 is an enlarged view of a portion a in fig. 2.

Reference numerals are as follows: 1-heat treatment box, 2-movable door, 3-quenching box, 4-gear placing rack, 5-threaded rod, 6-crank, 7-movable sleeve, 8-guide rod, 9-X type hinge rod, 10-front hinge rod, 11-rear hinge rod, 12-slide rod, 13-slide block, 14-guide wheel, 15-cooling box, 16-spray dust-removing box, 17-active carbon filtering box, 18-first connecting pipe, 19-second connecting pipe, 20-third connecting pipe, 21-centrifugal fan, 22-air outlet pipe, 23-air outlet pipe, 24-cold source inlet pipe, 21-centrifugal fan, 22-air outlet pipe, etc 25-cold source discharge pipe, 26-serpentine cooling pipe, 27-radiating fin, 28-transverse partition plate, 29-water inlet, 30-spraying cavity, 31-water storage cavity, 32-water inlet pipe, 33-water outlet pipe, 34-booster water pump, 35-water delivery pipe, 36-water spray pipe, 37-corner two-way connecting pipe, 38-spraying pipe, 39-spraying head, 40-first filter screen, 41-second filter screen, 42-vertical partition plate, 43-air vent, 44-fixing plate, 45-nylon rope, 46-active carbon filter plate, 47-slot, 48-insert block.

Detailed Description

As shown in figure 1 and figure 2, the utility model discloses a heat treatment box 1 that inside cavity set up, the front side of heat treatment box 1 articulates there is dodge gate 2, is provided with locking mechanism on the dodge gate 2, and the sealing strip sealing connection is passed through with heat treatment box 1's junction to dodge gate 2, avoids appearing gas leakage phenomenon. The inside below of thermal treatment case 1 is installed the quenching case 3 that the top is uncovered and is set up, and quenching liquid has been held to quenching case 3 inside, and the thermal treatment case 1 that is located quenching case 3 top is inside to be provided with gear rack 4, and gear workpiece places on gear rack 4, and the elevating system that is used for driving gear rack 4 to go up and down is installed to the inside top of thermal treatment case 1, and one side of thermal treatment case 1 is provided with exhaust treatment device. The lifting mechanism comprises a threaded rod 5 which is rotatably connected above the inside of the heat treatment box 1, one end of the threaded rod 5 extends to the outside of the heat treatment box 1 and is fixedly provided with a crank 6, two threads with opposite turning directions are arranged on the threaded rod 5, two movable sleeves 7 which are arranged at intervals are respectively in threaded connection with the outside of the two threads with opposite turning directions, a guide rod 8 which is horizontally arranged is fixedly arranged inside the heat treatment box 1 above the threaded rod 5, the upper portion of each movable sleeve 7 penetrates through the guide rod 8 and is in sliding connection with the guide rod 8, an X-shaped hinged rod 9 is arranged between the bottoms of the two movable sleeves 7, each X-shaped hinged rod 9 comprises a front hinged rod 10 and a rear hinged rod 11, the middle position of each front hinged rod 10 is hinged with the middle position of each rear hinged rod 11 through a hinged bolt and a hinged nut, the top end of each front hinged rod 10 and the top end of each rear hinged rod 11 are respectively hinged with the bottoms of the two movable sleeves 7, a sliding rod 12 which is horizontally arranged at the top of the gear rack 4 is fixedly provided, the outside of each sliding rod 12 is in sliding connection with two sliders 13 which are arranged at intervals, and the bottom end of each front rod 10 and the bottom end of each rear rod 11 are respectively hinged with the tops of the two sliders 13. As shown in FIG. 4, the two ends of the top of the gear rack 4 are rotatably connected with guide wheels 14, and the guide wheels 14 are in rolling connection with the inner wall of the heat treatment box 1. The guide wheels 14 make the gear rack 4 smoother in the process of moving up and down along the vertical direction. Utilize elevating system to drive gear rack 4 and follow vertical direction motion, and then realize the purpose of gear rack 4 automatic rising, need not artifical handheld clamp and place the gear and quench the operation inside quenching case 3.

As shown in fig. 1, the exhaust gas treatment device comprises a cooling box 15, a spraying dust removal box 16 and an active carbon filter box 17 which are sequentially arranged at intervals, a first connecting pipe 18 is communicated between the upper part of a heat treatment box 1 and the lower part of the cooling box 15, a second connecting pipe 19 is communicated between the upper part of the cooling box 15 and the lower part of the spraying dust removal box 16, a third connecting pipe 20 is communicated between the upper part of the spraying dust removal box 16 and the upper part of the active carbon filter box 17, a centrifugal fan 21 is fixed on one side of the lower part of the active carbon filter box 17, an air outlet pipe 22 is communicated between the lower part of the active carbon filter box 17 and the air inlet end of the centrifugal fan 21, and an air outlet end of the centrifugal fan 21 is communicated with an air outlet pipe 23. As shown in fig. 2, the cooling box 15 is hollow, the top of the cooling box 15 is communicated with a cold source inlet pipe 24, the bottom of the cooling box 15 is communicated with a cold source outlet pipe 25, and a refrigerant is introduced into the cooling box 15 through the cold source inlet pipe 24 and the cold source outlet pipe 25 in a circulating manner. Inside serpentine cooling tube 26 that is provided with of cooler bin 15, serpentine cooling tube 26's bottom extends to cooler bin 15 outside one side and deviates from the one end body coupling of thermal treatment case 1 with first connecting pipe 18, serpentine cooling tube 26's top extends to cooler bin 15 outside opposite side and deviates from the one end body coupling that sprays dust removal case 16 with second connecting pipe 19, is fixed with the radiating fin 27 that a plurality of even intervals set up on serpentine cooling tube 26's the outer wall. As shown in fig. 3, a horizontal partition plate 28 horizontally arranged is fixed below the inside of the spraying and dust removing box 16, a water inlet 29 is formed in the horizontal partition plate 28, the horizontal partition plate 28 divides the inside of the spraying and dust removing box 16 into two independent chambers, namely a spraying chamber 30 located above and a water storage chamber 31 located below, a water inlet pipe 32 communicated with the inside of the water storage chamber 31 is fixed on one side of the lower portion of the spraying and dust removing box 16, a water outlet pipe 33 communicated with the inside of the water storage chamber 31 is fixed at the bottom of the spraying and dust removing box 16, stop valves are arranged on the water inlet pipe 32 and the water outlet pipe 33, clean spray water is introduced into the water storage chamber 31 through the water inlet pipe 32, and spray water repeatedly used is discharged from the inside of the water storage chamber 31 through the water outlet pipe 33. One end of the second connecting pipe 19 is communicated with one side of the lower portion of the spraying cavity 30, one end of the third connecting pipe 20 is communicated with one side of the upper portion of the spraying cavity 30, a booster pump 34 is installed on the outer side of the lower portion of the spraying dust removal box 16, the water inlet end of the booster pump 34 is communicated with the inside of the water storage cavity 31 through a water conveying pipe 35, the water outlet end of the booster pump 34 is communicated with a water spray pipe 36 extending upwards, the top of the water spray pipe 36 is communicated with a horizontally arranged spray pipe 38 through a corner two-way connecting pipe 37, one end of the spray pipe 38, which deviates from the water spray pipe 36, is sealed and extends to the upper portion inside the spraying cavity 30, and the bottom of the spray pipe 38, which is located inside the spraying cavity 30, is communicated with a plurality of spray heads 39 which are uniformly arranged at intervals along the length direction. The inside first filter screen 40 that is fixed with the level and sets up that is located the spray chamber 30 of shower 38 top, first filter screen 40 are located the third connecting pipe 20 and spray the below of dust removal case 16 junction, and the gas through spraying the dust removal operation is filtered through first filter screen 40 and is got into inside the active carbon filter box 17 through third connecting pipe 20 again, and first filter screen 40 filters the particulate impurity in the gas. The second filter screen 41 which is horizontally arranged is fixed inside the spraying cavity 30 which is positioned above the transverse partition plate 28, and the second filter screen 41 filters and removes impurities of the spraying water which flows back to the inside of the water storage cavity 31, so that the impurities are prevented from being sucked by the pressure water pump 34, and the service life of the pressure water pump 34 is prolonged. Activated carbon filter box 17's inside is fixed with the vertical division board 42 that a plurality of even intervals set up, bleeder vent 43 has all been seted up on every vertical division board 42, crisscross setting from top to bottom of two adjacent bleeder vents 43, all can dismantle the fixed plate 44 that is connected with the level setting between the upper portion of two adjacent vertical division boards 42 and between the inner wall of vertical division board 42 and activated carbon filter box 17, the bottom of fixed plate 44 is fixed with the nylon rope 45 that many even intervals set up, be fixed with the activated carbon filter 46 that a plurality of even intervals set up along its length direction on the nylon rope 45. On the inner wall on vertical division board 42 upper portion and all be fixed with the slot 47 that the opening set up on the inner wall on active carbon rose box 17 upper portion, the both ends of fixed plate 44 bottom are fixed with the inserted block 48 with slot 47 matched with, and inside the inserted block 48 joint slot 47, the active carbon cassette 46 is changed in easy to assemble. Through setting up vertical division board 42 and bleeder vent 43, the gaseous time that stops in activated carbon rose box 17 inside of extension promotes filtration purification's effect.

The utility model discloses a theory of operation and working process: when the gear rack is used, the crank 6 is rotated to drive the threaded rod 5 to rotate, the threaded rod 5 rotates to drive the two movable sleeves 7 to move oppositely or reversely, the X-shaped hinge rod 9 extends upwards or contracts downwards, the X-shaped hinge rod 9 drives the gear rack 4 to move in the vertical direction, and therefore the purpose of automatic lifting of the gear rack 4 is achieved, and quenching operation is completed; the quenching oil smoke waste gas generated in the quenching operation process firstly enters the inside of the serpentine cooling pipe 26 through the first connecting pipe 18 under the action of the centrifugal fan 21, a refrigerant is circularly introduced into the cooling box 15 through the cold source inlet pipe 24 and the cold source outlet pipe 25, the refrigerant cools the gas inside the serpentine cooling pipe 26, the cooled waste gas enters the spraying cavity 30 through the second connecting pipe 19, the waste gas is conveyed to the upper part of the spraying cavity 30 from the lower part of the spraying cavity 30, in the conveying process, under the action of the booster pump 34, spraying water inside the water storage cavity 31 sequentially enters the spraying pipe 38 through the water conveying pipe 35 and the water spraying pipe 36, then is sprayed to the inside of the spraying cavity 30 through the spraying head 39 to spray and remove impurities from the waste gas, the spraying water flowing downwards from the spraying cavity 30 flows back to the inside of the water storage cavity 31 through the second filter screen 41 and the water inlet hole 29 to realize the recycling of the spraying water, the gas after being filtered by the first filter screen 40, then enters the inside of the activated carbon filter box 17, is filtered by the activated carbon filter 46, and flows back to the outlet end of the centrifugal fan 23 communicated with the outside of the centrifugal fan 21. Can carry out effectual purification treatment to the waste gas that produces in the gear workpiece quenching process, purification efficiency is high, and purifying effect is good.

The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.

Claims

1. The utility model provides a heat treatment device for gear machining, includes the heat treatment case that inside cavity set up, and the inside below of heat treatment incasement portion is installed the quenching case that the top is uncovered to be set up, and the quenching incasement portion has held the quenching liquid, is located the inside gear rack that is provided with of heat treatment incasement portion above quenching, its characterized in that: a lifting mechanism for driving the gear placing frame to lift is arranged above the interior of the heat treatment box, and a waste gas treatment device is arranged on one side of the heat treatment box; the waste gas treatment device comprises a cooling box, a spraying dust removal box and an active carbon filter box which are sequentially arranged at intervals, wherein a first connecting pipe is communicated between the upper part of the heat treatment box and the lower part of the cooling box, a second connecting pipe is communicated between the upper part of the cooling box and the lower part of the spraying dust removal box, a third connecting pipe is communicated between the upper part of the spraying dust removal box and the upper part of the active carbon filter box, a centrifugal fan is fixed on one side of the lower part of the active carbon filter box, an air outlet pipe is communicated between the lower part of the active carbon filter box and the air inlet end of the centrifugal fan, and the air outlet end of the centrifugal fan is communicated with an exhaust pipe; the inside cavity setting of cooler bin, the top intercommunication of cooler bin has the cold source admission pipe, the bottom intercommunication of cooler bin has the cold source discharge pipe, the inside snakelike cooling tube that is provided with of cooler bin, the bottom of snakelike cooling tube extends to the outside one side of cooler bin and deviates from the one end body coupling of thermal treatment case with first connecting pipe, the top of snakelike cooling tube extends to the outside opposite side of cooler bin and deviates from the one end body coupling that sprays the dust removal case with the second connecting pipe, be fixed with the radiating fin that a plurality of even intervals set up on the outer wall of snakelike cooling tube.

2. The heat treatment apparatus for gear processing according to claim 1, wherein: the lifting mechanism comprises a threaded rod which is rotatably connected above the inside of the heat treatment box, one end of the threaded rod extends to the outside of the heat treatment box and is fixed with a crank, two threads with opposite turning directions are arranged on the threaded rod, two movable sleeves with two intervals are respectively in threaded connection with the outside of the two threads with opposite turning directions, a guide rod horizontally arranged is fixed inside the heat treatment box above the threaded rod, the upper part of each movable sleeve penetrates through the guide rod and is in sliding connection with the guide rod, an X-shaped hinged rod is arranged between the bottoms of the two movable sleeves and comprises a front hinged rod and a rear hinged rod, the middle position of the front hinged rod and the middle position of the rear hinged rod are hinged through hinged bolts and hinged nuts, the top end of the front hinged rod and the top end of the rear hinged rod are respectively hinged with the bottoms of the two movable sleeves, a horizontally arranged sliding rod is fixed at the top of the gear placing rack, two sliding blocks which are arranged at intervals are in sliding connection with the outside of the sliding rod, and the bottom end of the front rod and the bottom end of the rear hinged rod are respectively hinged with the tops of the two sliding blocks.

3. The heat treatment apparatus for gear processing according to claim 2, wherein: the inside below of dust removal incasement portion that sprays is fixed with the horizontal separators that the level set up, the inlet opening has been seted up on the horizontal separators, horizontal separators will spray the dust removal incasement portion and divide into two independent cavities, be the chamber that sprays that is located the top respectively, the water cavity that deposits that is located the below, one side of spraying the dust removal case lower part is fixed with and deposits the water inlet tube that water cavity portion is linked together, the bottom that sprays the dust removal case is fixed with and deposits the water intracavity portion intercommunication drain pipe, the one end of second connecting pipe is linked together with one side of spraying the chamber lower part, the one end of third connecting pipe is linked together with one side of spraying the chamber upper portion, pressurized water pump is installed in the outside of spraying the dust removal case lower part, pressurized water pump's inlet end is linked together through raceway and water cavity portion, pressurized water pump's outlet end intercommunication has the spray pipe of upwards extending, the top of spray pipe is linked together through the spray pipe that the corner two-way connecting pipe set up horizontally, the one end that the spray pipe deviates from sets up and extends to spraying the inside of chamber, the bottom of the spray pipe that is located spraying the intracavity portion has the intercommunication of its length direction to have a plurality of even interval to set up.

4. The heat treatment apparatus for gear processing according to claim 3, wherein: the spraying cavity above the spraying pipe is internally and horizontally provided with a first filter screen, the first filter screen is positioned below the joint of the third connecting pipe and the spraying dust removal box, and the spraying cavity above the transverse partition plate is internally and horizontally provided with a second filter screen.

5. The heat treatment apparatus for gear processing according to claim 3, wherein: the inside of active carbon rose box is fixed with the vertical division board that a plurality of even intervals set up, the bleeder vent has all been seted up on every vertical division board, two adjacent bleeder vents crisscross setting from top to bottom, all can dismantle the fixed plate that is connected with the level and sets up between the upper portion of two adjacent vertical division boards and between the inner wall of vertical division board and active carbon rose box, the bottom of fixed plate is fixed with the nylon rope that many even intervals set up, the active carbon cassette that its length direction was fixed with a plurality of even intervals setting on the nylon rope.

6. The heat treatment apparatus for gear processing according to any one of claims 1 to 5, wherein: both ends at the top of the gear placing frame are rotatably connected with guide wheels, and the guide wheels are in rolling connection with the inner wall of the heat treatment box.