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CN-122013096-A - Novel energy-saving environment-friendly box-type nitriding furnace with tank and controllable atmosphere

CN122013096ACN 122013096 ACN122013096 ACN 122013096ACN-122013096-A

Abstract

The invention relates to the technical field of heat treatment equipment, in particular to a novel energy-saving environment-friendly box-type nitriding furnace with a tank controlled atmosphere, which comprises a furnace shell, wherein a tank is arranged in the furnace shell, a tank opening flange with a sealing ring is arranged at an inlet and an outlet of the tank, the tank opening flange is matched with a furnace door operated by an opening and closing mechanism, the opening and closing mechanism comprises a horizontal pushing component and a vertical moving component which are used for driving the furnace door to move transversely, the surfaces of the inner wall and the inner structure of the tank are coated with an anti-nitriding protective layer by laser, the tank is provided with an air guide mechanism, and the air guide mechanism comprises fan blades which are arranged at the inner top of the tank and are used for forming longitudinal circulation. The furnace door adopts a horizontal pushing and vertical moving opening and closing mode, so that the sealing ring is effectively prevented from being worn in the furnace door opening and closing process, the furnace tank and the internal structure adopt laser cladding treatment, nitrogen atom infiltration is effectively resisted, the fan blade is innovatively arranged at the top in the furnace tank, longitudinal circulation is formed in the furnace tank, the uniformity of atmosphere and temperature in the furnace tank is improved, and the nitriding treatment quality of a workpiece is improved.

Inventors

  • CUI TIE
  • Pei Jibao

Assignees

  • 亚捷科技（唐山）股份有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (10)

  1. 1. The novel energy-saving environment-friendly box-type nitriding furnace with the controllable atmosphere is characterized by comprising a furnace shell (1), wherein a furnace tank (2) is arranged in the furnace shell (1), a tank opening flange (21) with a sealing ring (51) is arranged at an inlet and an outlet of the furnace tank (2), a furnace door (3) operated through an opening and closing mechanism (4) is matched with the tank opening and closing mechanism (21), the opening and closing mechanism (4) comprises a flat pushing assembly (41) for driving the furnace door (3) to transversely move and a vertically moving assembly (42), an anti-nitriding protective layer is coated on the inner wall of the furnace tank (2) and the surface of an inner structure through laser cladding, the furnace tank (2) is provided with a wind guiding mechanism (6), and the wind guiding mechanism (6) comprises fan blades (62) for forming longitudinal circulation and arranged at the inner top of the furnace tank (2).
  2. 2. The novel energy-saving environment-friendly box-type nitriding furnace with the tank and controllable atmosphere according to claim 1, wherein the horizontal pushing assembly (41) comprises a supporting arm (412) which is arranged in a sliding manner transversely and a first telescopic driving piece which is used for driving the supporting arm (412) to move, the supporting arm (412) is arranged on the left side and the right side of the furnace shell (1), the vertical moving assembly (42) comprises vertical supporting rods (421) which are vertically arranged at the end parts of the supporting arm (412), connecting plates (429) and driving assemblies which are used for driving the connecting plates (429) to vertically move are arranged on the vertical supporting rods (421), and the furnace door (3) is connected with the connecting plates (429) on the two sides respectively.
  3. 3. The novel energy-saving environment-friendly box-type nitriding furnace with the tank controlled atmosphere according to claim 2, wherein a supporting platform (422) is arranged between the top ends of two vertical supporting rods (421), a driving assembly comprises a gear motor (423) arranged on the supporting platform (422), an output hole of the gear motor (423) is connected with a driving shaft (424) which is transversely arranged, a driving chain wheel (425) is arranged at the end part of the driving shaft (424), a driving chain wheel (426) is respectively and rotatably arranged on the bottom of the vertical supporting rods (421) and the supporting platform (422), a driving chain (427) is arranged between the driving chain wheel (425) and the driving chain wheel (426), the driving chain (427) is connected with a connecting plate (429), and the vertical supporting rods (421) comprise a lower supporting rod (4211) and an upper supporting rod (4212) which are assembled in a folding mode.
  4. 4. The novel energy-saving environment-friendly box-type nitriding furnace with the tank controlled atmosphere according to claim 3, wherein a chute is arranged in the vertical supporting rod (421), a deflection adjusting component (43) is arranged on the connecting plate (429), the deflection adjusting component (43) comprises a guide wheel (431) rotatably arranged in the middle of the connecting plate (429), the guide wheel (431) is rotatably supported in the chute, a deflection adjusting plate (432) with an adjustable position is arranged at the bottom of the connecting plate (429), a deflection adjusting wheel (433) is rotatably arranged on the deflection adjusting plate (432), and the deflection adjusting wheel (433) is rotatably supported in the chute.
  5. 5. The novel energy-saving environment-friendly box-type nitriding furnace with the tank and controllable atmosphere according to claim 1, further comprising a sealing mechanism (5), wherein the sealing mechanism (5) comprises a water cooling channel (52) arranged in a tank opening flange (21), the water cooling channel (52) is connected with a water inlet pipe and a water outlet pipe, an air guide groove (511) is formed in the inner side of the sealing ring (51), and the air guide groove (511) is connected with an air inlet nozzle and a pressure relief valve.
  6. 6. The novel energy-saving environment-friendly box-type nitriding furnace with the tank controlled atmosphere according to claim 5, wherein the furnace door (3) and the tank opening flange (21) are detachably fixed through the clamping component (53), a plurality of clamping components (53) are arranged around the tank opening flange (21), the clamping component (53) comprises a second telescopic driving piece arranged on the outer side of the furnace shell (1), the second telescopic driving piece extends towards the center of the tank opening flange (21), and a clamp (533) for clamping and fixing the furnace door (3) and the tank opening flange (21) is arranged at the two ends of the telescopic driving piece.
  7. 7. The novel energy-saving environment-friendly box-type nitriding furnace with a tank and controllable atmosphere according to claim 6, wherein the telescopic driving piece II is a cylinder II (531), a base plate (532) is arranged at the end part of a piston rod of the cylinder II (531), the caliper (533) is U-shaped, a containing groove (5331) for containing the base plate (532) is formed in the middle position of the outer side of the caliper (533), the width of the containing groove (5331) is larger than that of the base plate (532), a waist-shaped hole II (5333) penetrating through the middle of the caliper (533) is formed, a screw sliding sleeve (534) connected with the base plate (532) is penetrated in the waist-shaped hole II (5333), a gap is reserved between a screw cap of the screw sliding sleeve (534) and the inner wall of the caliper (533), and compression springs (537) for elastically supporting the base plate (532) and the caliper (533) are respectively arranged on the left side and the right side of the base plate (532).
  8. 8. The novel energy-saving environment-friendly box-type nitriding furnace with the tank controlled atmosphere according to claim 1, wherein the air guide mechanism (6) comprises air guide side plates (63) vertically arranged at the left side and the right side inside the furnace tank (2), an air passage is reserved between the air guide side plates (63) and the inner wall of the furnace tank (2), an air guide bottom plate (64) which is arranged in a herringbone mode is arranged on the inner bottom wall of the furnace tank (2), the extending direction of the air guide bottom plate (64) is the same as the length direction of the furnace tank (2), a motor II (61) is arranged on the outer wall of the top of the furnace tank (2), and an output hole shaft of the motor II (61) is connected with fan blades (62).
  9. 9. The novel energy-saving environment-friendly box-type nitriding furnace with the tank controlled atmosphere according to claim 1, wherein the explosion venting mechanism (8) is arranged at the tail of the furnace tank (2), the explosion venting mechanism (8) comprises an explosion venting cylinder (81) extending to the outside of the furnace shell (1), a protection screen (82) is arranged on one side, close to the furnace tank (2), of the explosion venting cylinder (81), an explosion venting sheet (85) is arranged on one side, far away from the furnace tank (2), of the explosion venting cylinder (81), and a protection screen cylinder (89) is arranged on the outer side of the explosion venting sheet (85).
  10. 10. The novel energy-saving environment-friendly box-type nitriding furnace with the tank and controllable atmosphere according to claim 1, which is characterized by further comprising a heating mechanism (9), wherein the heating mechanism (9) comprises a heating element arranged around the periphery of the furnace tank (2), a heating element arranged in the furnace door (3) and a heating element arranged at the tail part of the furnace shell (1).

Description

Novel energy-saving environment-friendly box-type nitriding furnace with tank and controllable atmosphere Technical Field The invention relates to the technical field of heat treatment equipment, in particular to a novel energy-saving environment-friendly box-type nitriding furnace with a tank and controllable atmosphere. Background Nitriding furnaces have wide market demands in the fields of automotive manufacturing, aerospace, tool and die manufacturing, machine manufacturing, hydraulic parts, general/special machining, and the like. The heat treatment process core of the box-type nitriding furnace with the tank is to carry out nitriding or nitrocarburizing treatment, namely, ammonia gas, carbon dioxide and protective nitrogen gas are introduced into the furnace, the ammonia gas is decomposed at high temperature to generate active nitrogen atoms, the nitrogen atoms are adsorbed by the surface of a high-temperature workpiece and continuously spread to the inside, and are combined with iron and alloy elements to form a hard nitriding layer, so that the surface hardness, wear resistance, corrosion resistance, seizure resistance and fatigue resistance of a metal part are obviously improved, and the workpiece after nitriding treatment has good appearance quality, uniform hardness, small deformation, and obviously improved service life and performance. Nitriding furnaces belong to metal heat treatment furnaces, traditional nitriding furnaces are affected by factors such as reduced tightness caused by abrasion of furnace door sealing rings, reduced structural performance caused by nitriding corrosion in furnace tanks, poor atmosphere and temperature uniformity in the furnace tanks and the like, and the problems of occupational health hazard risks of operators, short service life of nitriding furnaces and accessories thereof, limited nitriding quality of workpieces and the like exist. Disclosure of Invention The invention provides a novel energy-saving environment-friendly box-type nitriding furnace with a tank and controllable atmosphere, which aims to improve the intrinsic safety of the nitriding furnace, the service life of accessories and the nitriding quality of workpieces. The invention provides a novel energy-saving environment-friendly box-type nitriding furnace with a tank and controllable atmosphere, which adopts the following technical scheme: The utility model provides a novel energy-concerving and environment-protective box area jar controlled atmosphere nitriding furnace, including the stove outer covering, install the stove jar in the stove outer covering, stove jar access & exit department is provided with the jar mouth flange that has the sealing washer, jar mouth flange cooperation has the furnace gate through the operation of mechanism that opens and shuts, the mechanism that opens and shuts is including being used for driving furnace gate lateral shifting's flat push subassembly and the vertical subassembly that moves, stove jar inner wall and inner structure surface laser cladding have the anti protective layer of nitriding, the stove jar is equipped with wind-guiding mechanism, wind-guiding mechanism is including installing the flabellum that top is used for forming vertical circulation in the stove jar. By adopting the technical scheme, the furnace door adopts the opening and closing mode of horizontal pushing and vertical moving, compared with the opening and closing mode of the traditional locking chain lifting matched locking structure, the situation that the sealing ring is worn in the furnace door opening and closing process is effectively avoided, the furnace tank and the internal structure adopt laser cladding treatment, nitrogen atom infiltration is effectively resisted, nitriding corrosion is reduced, the service lives of the furnace tank and the auxiliary structure are effectively prolonged, the fan blade is innovatively arranged at the inner top of the furnace tank, longitudinal circulation is formed in the furnace tank, the uniformity of atmosphere and temperature in the furnace tank is obviously improved, and further the nitriding treatment quality of workpieces is improved. Preferably, the horizontal pushing assembly comprises a supporting arm and a first telescopic driving piece, wherein the supporting arm is arranged in a transverse sliding mode, the first telescopic driving piece is used for driving the supporting arm to move, the supporting arm is arranged on the left side and the right side of the furnace shell, the vertical moving assembly comprises a vertical supporting rod vertically arranged at the end part of the supporting arm, a connecting plate and a driving assembly used for driving the connecting plate to vertically move are arranged on the vertical supporting rod, and the furnace door is connected with the connecting plates on the two sides respectively. Through adopting above-mentioned technical scheme, when closing the furnace gate, erect and move the subasse