CN219279972U

CN219279972U - Large gear tooth surface field quenching equipment

Info

Publication number: CN219279972U
Application number: CN202221003188.1U
Authority: CN
Inventors: 龙伟华; 王泽�; 陈耀; 唐建华; 汪哲飞; 周龙
Original assignee: Zhejiang Zhengneng Electric Power Engineering Technology Co ltd
Current assignee: Zhejiang Zhengneng Electric Power Engineering Technology Co ltd
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2023-06-30
Anticipated expiration: 2032-04-26

Abstract

The utility model belongs to field quenching equipment for the surface of a large gear tooth part, which comprises a walking base, wherein the walking base comprises a base seat, a base seat and a base seat; the flame heating and water cooling integrated nozzle is arranged on the walking base and is provided with an upper bracket and a lower bracket, the front ends of the upper bracket and the lower bracket are mutually separated to form a tooth part processing station, the upper bracket and the lower bracket are respectively provided with a flame spraying part and a water spraying part, and the flame nozzle of the flame spraying part and the water spraying hole of the water spraying part face the tooth part processing station; the welding torch is provided with an input end connected with the oxygen storage tank and the acetylene storage tank and a mixer output end connected with the flame spraying part; the water inlet pipe is connected with the water spraying part. The utility model adopts the synchronous cooling treatment of the flame heating of each tooth surface by using cooling water, can meet the aim of heat treatment of the working surface of the gear, and is suitable for quenching the tooth surface of a large gear in on-site online non-disassembly.

Description

Large gear tooth surface field quenching equipment

Technical Field

The utility model belongs to the technical field of processing machinery, relates to a large gear processing device, and particularly relates to large gear tooth part surface field quenching equipment.

Background

The large gear is used in the ball mill, and because the working environment is poor, the large gear is driven to have a large working load, the open-type driven gear bears a heavy load for a long time, the working surface is severely worn, and the working surface of the large gear needs to be subjected to strengthening treatment on site after the original hardening layer is worn, so that the service life of the large gear is prolonged. The ball mill large gear and the cylinder body are connected into a whole, the weight and the volume are huge, the integral furnace feeding condition is obviously not provided, and the processing equipment for carrying out heat treatment work for improving the surface hardness on site under the condition that the ball mill equipment is not disassembled is lacking at present.

Disclosure of Invention

The object of the present application is to address the above problems by providing a large gear tooth surface in situ quenching apparatus;

the utility model creatively provides large-scale gear tooth part surface field quenching equipment, which comprises the following components:

a walking base;

the flame heating and water cooling integrated nozzle is arranged on the walking base and is provided with an upper bracket and a lower bracket, the front ends of the upper bracket and the lower bracket are mutually separated to form a tooth part processing station, the upper bracket and the lower bracket are respectively provided with a flame spraying part and a water spraying part, and the flame nozzle of the flame spraying part and the water spraying hole of the water spraying part face the tooth part processing station;

the welding torch is provided with an input end connected with the oxygen storage tank and the acetylene storage tank and a mixer output end connected with the flame spraying part;

the water inlet pipe is connected with the water spraying part.

The surface of each tooth is heated, and meanwhile, the cooling water is utilized to perform nearly synchronous cooling treatment, so that the quenching is feasible, simple and effective, the aim of heat treatment of the working surface of the gear in an on-line state is fulfilled, the mechanical performance requirement is met, and the service life is prolonged.

The walking base is connected with a linear driver provided with a speed adjusting device, a temperature sensor is arranged on the walking base and is in signal connection with the speed adjusting device of the linear driver through a temperature controller, so that the linear driver is controlled to accelerate when the temperature of the temperature sensor is higher than the set range of the temperature controller, and the linear driver is controlled to decelerate when the temperature of the temperature sensor is lower than the set range of the temperature controller.

The temperature sensor ensures that the flame on the surface of each tooth is accurately heated to the quenching temperature.

The side part of the flame spraying part is provided with a circulating cooling water pipe, the inlet end of the circulating cooling water pipe is connected with a water inlet pipe, and the outlet end of the circulating cooling water pipe is connected with a water outlet pipe.

The circulating cooling water pipe is used for cooling the flame spraying part, so that the normal work of the flame spraying part caused by overheat of the nozzle is avoided.

The water inlet pipe and the water outlet pipe form waterway circulation through connecting the water tank.

The flame spraying parts on the upper bracket and the lower bracket are respectively U-shaped, the circulating cooling water pipe is arranged at the outer side of the flame spraying part, and the water spraying part is arranged at the outer side of the circulating cooling water pipe.

The water spraying part comprises a first water spraying branch pipe and a second water spraying branch pipe which are respectively arranged at two sides of the flame spraying part, the first water spraying branch pipe, the second water spraying branch pipe and the water inlet pipe are connected through a two-position three-way reversing valve, and the walking base drives the flame heating and water cooling integrated nozzle to do lateral reciprocating movement.

The water collector is arranged below the first water spraying branch pipe and the second water spraying branch pipe, the bottom of the water collector is connected to the water tank through the water return pipe, spraying water circulation is realized, and the requirements of energy conservation, environmental protection and clean production are met.

The working state can be switched according to the walking path through the two spray branch pipes with same water inlet and different water return, so that accurate cooling temperature control can be obtained under the running state in two directions.

The flame nozzles are arranged in a plurality of rows in a staggered manner, each row of flame nozzles is arranged along the front and back directions of the flame spraying part, and the flame parts of adjacent flame nozzles in each row of flame nozzles are overlapped or connected.

The two rows of flame nozzles are staggered, and the flames are overlapped or connected to cover the surface of the large gear, so that the requirement that the tooth-shaped quenching surface can be continuously and uniformly heated is met.

The spacing between adjacent flame nozzles in each row of flame nozzles increases progressively from front to back.

The distance between adjacent flame nozzles is gradually increased from front to back, so that the flame can be uniformly covered on the surface of the involute curve gear, and the surface of the gear is uniformly heated.

The outlet of the flame nozzle has a transition tapered passage that gradually increases from the inside to the outside.

The problem of unsmooth gas outlet is improved, the fire of the heater caused by small gas outlet is prevented, and the phenomena of blasting and pollution blocking are avoided.

The rear ends of the upper bracket and the lower bracket are hinged, and the upper bracket and the lower bracket are fixed through adjusting nuts and jackscrews so as to adjust the included angle between the upper bracket and the lower bracket.

The angle of the upper bracket and the lower bracket can be adjusted, so that the device can be suitable for tooth-shaped processing with different sizes.

The oxygen storage tank is connected with a plurality of oxygen cylinders through an oxygen bus, and the acetylene storage tank is connected with a plurality of acetylene cylinders through an acetylene bus.

Can realize alternate air supply and alternate bottle replacement, and ensure the pressure stability of the air storage outlet.

Compared with the prior art, the advantage of this application lies in:

1) The utility model adopts the synchronous cooling treatment of the flame heating of each tooth surface by using cooling water, can meet the aim of heat treatment of the working surface of the gear, is suitable for quenching the tooth surface of a large gear on site when the large gear is not disassembled on line, has simple structure and low cost, and can meet the mechanical property requirement and prolong the service life.

2) The flame heating and water cooling integrated nozzle is matched with the walking base, so that the temperature and cooling speed of a heating surface are controlled in the walking process, bidirectional processing is realized, the hardness of a tooth surface is improved, and the processing cost is low.

Drawings

Fig. 1 is a schematic structural view of a large gear tooth surface in-situ quenching apparatus provided herein.

Fig. 2 is a schematic side view partial structure provided in the present application.

Fig. 3 is a schematic top view partial structure provided in the present application.

Fig. 4 is a schematic view of a partial structure in a bottom view.

FIG. 5 is a schematic side view of a flame spraying section according to the present application.

Fig. 6 is a schematic diagram of a flame spraying section front view direction structure provided in the present application.

Fig. 7 is a schematic structural diagram of an integrated quick-connection air-water distribution plate provided by the application.

Fig. 8 is a schematic diagram of an internal structure of an integrated quick-connect air-water distribution plate provided in the present application.

Fig. 9 is a schematic structural view of a spray water distribution pipe provided in the present application.

Fig. 10 is a schematic view of a cooling cycle water distribution pipe provided in the present application.

Fig. 11 is a schematic structural view of a gas path distributing pipe provided in the present application.

Fig. 12 is a schematic block diagram of a circuit configuration provided in the present application.

In the figure: the device comprises a walking base 1, a bracket 11, a linear track 12, a linear driver 13, a flame heating and water cooling integrated nozzle 2, an upper bracket 21, a lower bracket 22, a flame spraying part 23, a flame nozzle 231, a transition conical passage 232, a water spraying part 24, a first water spraying branch pipe 241, a second water spraying branch pipe 242, a water spraying hole 243, a regulating nut 25, a jackscrew 26, a circulating cooling water pipe 27, a welding torch 3, an oxygen storage tank 31, an oxygen bus 311, an oxygen cylinder 312, an acetylene storage tank 32, an acetylene bus 321, an acetylene cylinder 322, a mixer output end 33, a water inlet pipe 4, a water pump 41, a water tank 42, a water outlet pipe 43, a water receiving disc 44, a water return pipe 45, a control valve 46, a temperature sensor 5, a temperature controller 6, a two-position three-way reversing valve 8, a throttle valve 81, an integrated quick-connection air-water distributing plate 9, a spray water distributing pipe 91, a cooling circulating water distributing pipe 92 and an air channel distributing pipe 93.

Detailed Description

Further illustrated by the following specific examples;

in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways than as described herein, and therefore the present utility model is not limited to the specific embodiments disclosed below.

As shown in fig. 1, the large-scale gear tooth surface field quenching device comprises a moving system, a flame heating water cooling integrated nozzle 2, a heating system and a water inlet system.

The moving system may employ a travel speed adjustment control device of the semiautomatic gas cutting machine to provide power for traveling in the tooth surface width direction, for example, CG3-100 type semiautomatic gas cutting machine.

Specifically, the moving system includes a traveling base 1, a bracket 11, and a linear actuator 13, the bracket 11 having legs extending and contracting in the vertical direction, the bracket 11 being provided with a linear rail, the traveling base 1 being engaged with the linear rail 12 and being driven to travel by the linear actuator 13.

As shown in fig. 1, 2, 3 and 4, the flame heating and water cooling integrated nozzle 2 is provided on the traveling base 1, and the width direction of the flame heating and water cooling integrated nozzle 2 is parallel to the linear rail.

The flame heating and water cooling integrated nozzle 2 is provided with an upper bracket 21 and a lower bracket 22, wherein the front ends of the upper bracket 21 and the lower bracket are mutually separated to form a tooth processing station.

The lower bracket 22 is connected to the integrated quick-connection air-water distributing plate 9, and the upper bracket 21 is hinged with the lower bracket 22 through a hinge.

Further, the rear ends of the upper bracket 21 and the lower bracket 22 are hinged to be capable of opening and closing along a vertical plane, an adjusting nut 25 is arranged on the upper bracket 21 along the vertical direction, a jackscrew 26 is connected in the adjusting nut 25 in a threaded manner, the bottom end of the jackscrew 26 is tightly propped against a groove on the upper surface of the lower bracket 22, and the purpose of adjusting an included angle between the upper bracket 21 and the lower bracket 22 is achieved through fixing the adjusting nut 25 and the jackscrew 26.

The upper and lower brackets 21 and 22 are each provided with a flame spraying portion 23, a water spraying portion 24, and a circulating cooling water pipe 27.

The flame spraying part 23, the water spraying part 24 and the circulating cooling water pipe 27 of the upper bracket 21 and the lower bracket 22 are connected with the integrated quick-connection air-water distributing plate 9 through a high-temperature-resistant hose or a copper pipe, wherein the high-temperature-resistant hose connection is adopted, the angle of adjustment is larger, and the copper pipe connection has higher stability.

The flame spraying parts 23 on the upper bracket 21 and the lower bracket 22 are U-shaped pipelines, both ends of the U-shaped pipelines are connected with a heating system, and a plurality of flame nozzles 231 are arranged on the flame spraying parts 23 at intervals. The circulating cooling water pipes 27 are also U-shaped pipes, which are closely attached to the outer side of the flame spraying part 23, and one end of each U-shaped pipe of each circulating cooling water pipe 27 is connected with the water inlet pipe 4, and the other end is connected with the water outlet pipe 43. The water spraying part 24 is provided with two branch pipes which are respectively arranged at two sides of the circulating cooling water pipe 27, and the two branch pipes are connected with the water inlet pipe 4 through a two-position three-way reversing valve 8 and a throttle valve.

As shown in fig. 4, 5 and 6, the flame nozzles 231 comprise a plurality of flame nozzles 231 which are arranged in two rows along the U-shaped pipeline in a front-back direction, the distance between adjacent flame nozzles 231 in each row of flame nozzles 231 increases gradually from front to back, the initial distance is set according to the size of the tooth gap, the shape of the nozzle and the heating temperature rise time length, the initial distance increases gradually according to the tangent value of the tooth root and tooth tip connecting line, the flames of adjacent flame nozzles 231 in each row of flame nozzles 231 are partially overlapped or connected, and the flames of the two rows of flame nozzles 231 are partially overlapped or connected on the orthographic projection surface, so that the heated coverage is ensured to be uniformly distributed.

The outlet of the flame nozzle 231 has a transition tapered passage 232 that gradually increases from inside to outside, the diameter of the flame nozzle 231 is 40.5 filaments, and the fire, the "blasting" and the fouling phenomena of the heater at this diameter can be avoided by the transition tapered passage 232.

As shown in fig. 4, the water spraying part 24 includes a first water spraying branch pipe 241 and a second water spraying branch pipe 242 which are respectively arranged at two sides of the flame spraying part 23, the first water spraying branch pipe 241 and the second water spraying branch pipe 242 are parallel to two side edges of the U-shaped pipeline, and a plurality of water spraying holes 243 are respectively arranged on the first water spraying branch pipe 241 and the second water spraying branch pipe 242 at intervals.

The plurality of water spray holes 243 are arranged in parallel with the flame nozzles 231 in a row.

As shown in fig. 1, 2 and 4, the first water spraying branch pipe 241, the second water spraying branch pipe 242 and the water inlet pipe 4 are connected through a two-position three-way reversing valve 8, and the traveling base 1 drives the flame heating and water cooling integrated nozzle 2 to do lateral reciprocating movement.

The walking base 1 moves along the linear track 12 under the driving of the linear driver 13, the linear driver 13 may be a cylinder, an oil cylinder or a motor, etc., and has a speed adjusting device, and the linear driver 13 with the speed adjusting device is a structure in a commercial product, which is known to those skilled in the art, and will not be described herein. The linear actuator 13 controls the traveling base 1 to reciprocate in the width direction of the flame heating and water cooling integrated nozzle 2 in a specific section.

The temperature sensor 5 is arranged above the integrated quick-connection air-water flow distribution plate 9, the temperature sensor 5 can be an infrared temperature sensor, the sensing end of the temperature sensor 5 faces the tooth processing position, and the temperature sensor 5 is in signal connection with the temperature controller 6.

As shown in fig. 12, the temperature sensor 5 is connected to a speed adjusting device of the linear actuator 13 through the temperature controller 6, and in an initial state, the linear actuator 13 drives the traveling base 1 to move at a constant speed v0, the linear actuator 13 drives the traveling base 1 to move at a speed v1 greater than v0 when the temperature is higher than the set range of the temperature controller 6, and the linear actuator 13 drives the traveling base 1 to move at a speed v2 less than v0 when the temperature is lower than the set range of the temperature controller 6.

In one embodiment, the two-position three-way reversing valve 8 is a manual valve.

In one embodiment, the two-position three-way reversing valve 8 is an electric valve, and the two-position three-way reversing valve 8 is in signal connection with the linear driver 13 through photoelectric sensors or proximity sensors arranged at two ends of the stroke of the linear driver 13, so that when the linear driver 13 drives the traveling base 1 to reach the side displacement limit of the first water spraying branch pipe 241, the two-position three-way reversing valve 8 is connected with the first water spraying branch pipe 241 and the water inlet pipe 4; when the linear driver 13 drives the traveling base 1 to reach the side displacement limit of the second water spraying branch pipe 242, the two-position three-way reversing valve 8 is connected with the second water spraying branch pipe 242 and the water inlet pipe 4.

As shown in fig. 1, 2 and 4, the flame nozzle 231 of the flame spraying part 23 and the water spraying hole 243 of the water spraying part 24 are directed toward the tooth processing station. That is, the flame nozzles 231 and the water spray holes 243 on the upper bracket 21 are provided on the lower surface of the upper bracket 21, and the flame nozzles 231 and the water spray holes 243 on the lower bracket 22 are provided on the upper surface of the lower bracket 22.

The heating system comprises a welding torch 3, the welding torch 3 having an input connected to an oxygen reservoir 31 and an acetylene reservoir 32, and a mixer output 33 connected to the flame spraying section 23.

In this embodiment, the welding torch 3 is an H01-20 welding torch.

The oxygen storage tank 31 is connected with a plurality of oxygen cylinders 312 through an oxygen bus 311, each oxygen cylinder 312 is provided with a switching valve independently, the acetylene storage tank 32 is connected with a plurality of acetylene cylinders 322 through an acetylene bus 321, and each acetylene cylinder 322 is provided with a switching valve independently.

Alternately supplying air, alternately changing bottles, and ensuring that the outlet pressure of the oxygen storage tank is stabilized at 1-1.1 MPa and the outlet pressure of the acetylene storage tank 32 is stabilized at 0.1-0.13 MPa.

As shown in fig. 1 and 2, the mixer output 33 of the welding torch 3 is connected to the travelling base 1 by means of an integrated quick-connect air-water distributor plate 9.

As shown in fig. 1 and 2, the water inlet system includes a water inlet pipe 4, a water tank 42, a water outlet pipe 43, a water receiving tray 44, and a water return pipe 45.

The water inlet pipe 4 is respectively connected with the water spraying part 24 and the circulating cooling water pipe 27, the water inlet pipe 4 is connected with the water tank 42 through the water pump 41, the water pump 41 and the throttle valve 81 jointly act to adjust the water pressure, the water pressure is maintained between 0.12 and 0.2MPa, and the stability of water is ensured, so that the stability of quenching hardness is ensured. The water inlet pipe 4 and the water outlet pipe 43 form waterway circulation by being connected with the water tank 42.

The water collector 44 is located walking base 1 front end, and is located the below of first water spray branch pipe 241 and second water spray branch pipe 242, and water collector 44 bottom is connected to water tank 42 through wet return 45, realizes the shower water circulation.

As shown in fig. 7, 8, 9, 10 and 11, the integrated quick-connect air-water distribution plate 9 specifically includes two groups of shower water distribution pipes 91, two groups of cooling circulation water distribution pipes 92 and two groups of air path distribution pipes 93.

With reference to fig. 1, 7, 8 and 9, the inlets of the two groups of spray water distribution pipes 91 are connected with the water inlet pipe 4 through the two-position three-way reversing valve 8 and the throttle valve 81, and the outlets are respectively connected with the first water spray branch pipe 24 of the upper bracket and the second water spray branch pipe 242 of the upper bracket and the lower bracket.

Referring to fig. 3, 8 and 10, the inlet of one of the two sets of cooling circulation water distribution pipes 92 is connected to the water inlet pipe 4 through the control valve 46, the outlet is connected to one end of the circulation water pipes 27 of the upper and lower brackets, the inlet of the other set of cooling circulation water distribution pipe 92 is connected to the water outlet pipe 43, and the outlet is connected to the other end of the circulation water pipes 27 of the upper and lower brackets.

As shown in fig. 2, 8 and 11, the inlets of the two sets of gas distribution pipes 93 are connected to the welding torch 3, and the outlets are respectively connected to the two ends of the flame spraying part 23 of the upper and lower brackets.

The integrated quick air-water connection flow distribution plate 9 realizes quick connection of various pipelines, effectively avoids connection confusion of the pipelines, and saves space and installation time.

The working principle of the utility model is as follows:

the temperature controller 6 sets the highest and lowest critical temperatures in advance. The flame heating and water cooling integrated nozzle 2 is moved to the position of the tooth to be processed of the gear, the upper bracket 21 and the lower bracket 22 are respectively positioned on the upper side and the lower side of the tooth to be processed, the welding torch 3 is started to heat, meanwhile, the control valve 46 of the circulating cooling water pipe 27 is started to perform circulating water cooling, the traveling base 1 moves from one end of the tooth to be processed to the other end along the tooth width direction, the water spraying part 24 on one side of the flame spraying part 23, deviating from the traveling direction, is started to perform water spraying quenching, and during reversing, the two-position three-way reversing valve 8 is reversed, and the water spraying part 24 on the other side is started to perform water spraying quenching, so that the effect of improving the surface hardness is achieved.

By adopting the technical scheme for heat treatment, the problem of fire and 'blasting' does not occur in field work. The on-site on-line tooth surface quenching strengthening treatment is safely and rapidly carried out on the large gear of the ball mill (coal grinding) machine, the surface layer of the workpiece is heated to the quenching temperature by flame through detection, and then the surface layer with high hardness and favorable internal stress distribution are obtained through quenching by cooling water rapid cooling and heating, so that the wear resistance and fatigue strength of the workpiece are improved, and the method has considerable benefit and good effect.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Although terms of the traveling base 1, the bracket 11, the linear rail 12, the linear actuator 13, the flame heating water cooling integrated nozzle 2, the upper bracket 21, the lower bracket 22, the flame spraying part 23, the flame nozzle 231, the transition taper passage 232, the water spraying part 24, the first water spraying branch 241, the second water spraying branch 242, the water spraying hole 243, the adjusting nut 25, the jackscrew 26, the circulation cooling water pipe 27, the welding torch 3, the oxygen tank 31, the oxygen bus 311, the oxygen cylinder 312, the acetylene tank 32, the acetylene bus 321, the acetylene cylinder 322, the mixer output 33, the water inlet pipe 4, the water pump 41, the water tank 42, the water outlet pipe 43, the water receiving tray 44, the water return pipe 45, the control valve 46, the temperature sensor 5, the temperature controller 6, the two-position three-way reversing valve 8, the integrated quick-water receiving plate 9, the shower water distribution pipe 91, the cooling circulation water distribution pipe 92, the gas path distribution pipe 93, and the like are used more herein. These terms are only used to more conveniently describe and explain the nature of the utility model and should be construed in a manner consistent with their spirit and scope.

Claims

1. A large gear tooth surface in situ quenching apparatus comprising:

a walking base (1);

the flame heating and water cooling integrated nozzle (2) is arranged on the walking base (1) and is provided with an upper bracket (21) and a lower bracket (22) with front ends mutually separated to form a tooth processing station, the upper bracket (21) and the lower bracket (22) are respectively provided with a flame spraying part (23) and a water spraying part (24), and the flame nozzle (231) of the flame spraying part (23) and the water spraying hole (243) of the water spraying part (24) face the tooth processing station;

a welding torch (3) having an input end connected to the oxygen tank (31) and the acetylene tank (32), and a mixer output end (33) connected to the flame spraying section (23);

the water inlet pipe (4) is connected with the water spraying part (24).

2. A large tooth portion surface field quenching apparatus as defined in claim 1, wherein: the walking base (1) is connected with a linear driver (13) with a speed adjusting device, the walking base (1) is provided with a temperature sensor (5), and the temperature sensor (5) is in signal connection with the speed adjusting device of the linear driver (13) through a temperature controller (6).

3. A large gear tooth surface in situ quenching apparatus as claimed in claim 1, wherein: the side part of the flame spraying part (23) is provided with a circulating cooling water pipe (27), the inlet end of the circulating cooling water pipe (27) is connected with the water inlet pipe (4), and the outlet end of the circulating cooling water pipe is connected with the water outlet pipe (43).

4. A large gear tooth surface in situ quenching apparatus as claimed in claim 3 wherein: the flame spraying parts (23) on the upper bracket (21) and the lower bracket (22) are respectively U-shaped, the circulating cooling water pipe (27) is arranged on the outer side of the flame spraying part (23), and the water spraying part (24) is arranged on the outer side of the circulating cooling water pipe (27).

5. A large gear tooth surface in situ quenching apparatus as claimed in claim 1, wherein: the water spraying part (24) comprises a first water spraying branch pipe (241) and a second water spraying branch pipe (242) which are respectively arranged at two sides of the flame spraying part (23), the first water spraying branch pipe (241), the second water spraying branch pipe (242) and the water inlet pipe (4) are connected through a two-position three-way reversing valve (8), and the walking base (1) drives the flame heating and water cooling integrated nozzle (2) to do lateral reciprocating movement.

6. A large gear tooth surface in situ quenching apparatus as claimed in claim 1, wherein: the flame nozzles (231) are arranged in a plurality of staggered rows, each row of flame nozzles (231) is arranged along the front and back directions of the flame spraying part (23), and the flame parts of adjacent flame nozzles (231) in each row of flame nozzles (231) are overlapped or connected.

7. A large gear tooth surface field quench apparatus as in claim 1 or 6 wherein: the spacing between adjacent flame nozzles (231) in each row of flame nozzles (231) increases gradually from front to back.

8. A large gear tooth surface in situ quenching apparatus as claimed in claim 1, wherein: the outlet of the flame nozzle (231) has a transition tapered passage (232) that gradually increases from the inside to the outside.

9. A large gear tooth surface in situ quenching apparatus as claimed in claim 1, wherein: the rear ends of the upper bracket (21) and the lower bracket (22) are hinged, and the upper bracket (21) and the lower bracket (22) are fixed through an adjusting nut (25) and a jackscrew (26) so as to adjust the included angle between the upper bracket (21) and the lower bracket (22).

10. A large gear tooth surface in situ quenching apparatus as claimed in claim 1, wherein: the oxygen storage tank (31) is connected with a plurality of oxygen cylinders (312) through an oxygen bus (311), and the acetylene storage tank (32) is connected with a plurality of acetylene cylinders (322) through an acetylene bus (321).