CN215404383U - Metal heat treatment furnace - Google Patents

Abstract

The utility model discloses a metal heat treatment furnace, which comprises a furnace body and a furnace tank, wherein a sealing upper cover is arranged on the furnace body, a furnace cover is arranged on the sealing upper cover, an air outlet is arranged on the furnace cover, and a safety valve is arranged right above the air outlet; the upper surface of the furnace cover is provided with a mounting bracket, and the mounting bracket is provided with a thermal circulation device; the side surface of the furnace body is provided with a lifting rotating device, the lifting rotating device is provided with a connecting platform, the connecting platform is connected with the mounting bracket through a fixed rod, and the lifting rotating device can drive the furnace cover and the sealing upper cover to lift or rotate together after working; the thermal circulation device is arranged to ensure that the gas in the furnace cover is in full physical contact with the metal; the lifting rotating device is arranged, so that the furnace cover can be conveniently opened and rotated, and the placed materials have larger operating space; the safety valve is arranged, so that the working pressure of the furnace tank is ensured to be within a safety range.

Description

Metal heat treatment furnace

Technical Field

The utility model belongs to the field of metal surface treatment, and particularly relates to a metal heat treatment furnace.

Background

The tempering furnace is a novel energy-saving periodic operation type heat treatment electric furnace and is mainly used for surface treatment of steel parts. The well type tempering furnace is one of the common equipments for heat treatment process, and is mainly used for tempering of quenching workpiece and heat treatment heating of nonferrous metal, and is used for tempering of general metal parts in air and quenching, annealing and aging heat treatment of light alloy parts such as aluminum alloy die casting, piston, aluminum plate, etc. Is particularly suitable for long workpieces needing to be vertically suspended and heated. The shaft furnace has good sealing performance, and workpieces can conveniently enter and exit the furnace. The pit furnace has simple structure, convenient operation and relatively less investment, thus being popular with domestic and foreign users. However, the well type tempering furnace of the prior art generally performs tempering treatment under normal pressure, and the treatment efficiency is low; in addition, the air in the existing tempering furnace is not circulated, so that the workpiece is easily heated unevenly, and the tempering quality of the workpiece is influenced; the furnace cover of the tempering furnace is usually opened in a mechanical lifting mode, but manual operation is also needed, the operation mode is complicated, and the operation intensity is high. Meanwhile, the safety valve of some existing heat treatment furnaces is also a conventional pressure relief valve and does not have the function of accurate pressure relief. Therefore, a heat treatment furnace with good heat cycle effect, safety and convenient operation needs to be designed.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model designs the metal heat treatment furnace, and the heat circulation device is added on the traditional heat treatment furnace to ensure that the gas in the furnace tank is fully contacted with the heat-treated metal material; the auxiliary lifting and rotating device is arranged on the side surface of the furnace body, so that the furnace cover can be conveniently opened and rotated, and the placed materials have larger operating space; meanwhile, a safety valve with a sensor is arranged on the furnace cover, so that the working pressure of the furnace tank can be ensured to be within a safety range.

The utility model aims to be realized by the following technical scheme: a metal heat treatment furnace comprises a furnace body and a furnace tank, wherein a sealing upper cover is arranged above the furnace body, a furnace cover is arranged on the sealing upper cover, an air outlet is formed in the furnace cover, and a safety valve is arranged right above the air outlet; the furnace cover is provided with a connecting channel at the center, a mounting bracket is arranged on the furnace cover, and a thermal circulation device is arranged on the mounting bracket and comprises a driving motor, a transmission rod and a fan; the transmission rod penetrates through a connecting channel in the center of the furnace cover, and the fan is connected with the transmission rod; the side surface of the furnace body is provided with a lifting rotating device, the lifting rotating device is provided with a connecting platform, the connecting platform is connected with the mounting bracket through a fixed rod, and after the lifting rotating device works, the furnace cover and the sealing upper cover are driven to lift or rotate together; a furnace lining is arranged in the furnace body, a thermocouple and a heating element are arranged on the inner side wall of the furnace lining, a controller is arranged on the furnace cover, and the controller is respectively and electrically connected with the thermocouple and the heating element; the furnace lining is provided with an annular groove, a furnace pot is arranged inside the furnace lining, and the furnace pot is placed in the annular groove; the furnace pot is characterized in that a convex block is arranged on the inner side wall of the furnace pot, a discharging frame is arranged in the furnace pot, and the discharging frame is placed on the convex block.

Preferably, the safety valve is arranged right above the air outlet of the furnace cover and comprises a valve body and an upper valve body cover, a first spring is arranged below the upper valve body cover, and a supporting platform is arranged in the valve body; one end of the first spring is fixedly connected with the upper cover of the valve body, the other end of the first spring is fixedly connected with the supporting platform, and the first spring is initially in a stretching state; a partition plate is arranged under the supporting platform, a through hole is formed in the partition plate, a plug for controlling the opening and closing of the through hole is further arranged above the partition plate, a first connecting rod is arranged at the lower end of the plug, and an armature is arranged below the first connecting rod; the side surface of the armature is provided with two second connecting rods which are symmetrical to each other, the tail end of each second connecting rod is provided with a limiting block, the inner side wall of the valve body is provided with a connecting block, a limiting groove is formed in the connecting block, the limiting block is clamped in the limiting groove, and the limiting block, the second connecting rods and the armature synchronously move in the limiting groove; the lower end of the armature is provided with a second spring, one end of the second spring is fixedly connected with the armature, and the other end of the second spring is fixedly connected with the inner wall of the valve body; an iron core is arranged under the armature, a coil is wound on the iron core, the iron core is fixed inside the valve body, and a pressure sensor is further arranged inside the valve body.

Preferably, a controller is arranged on the furnace cover, the pressure sensor is electrically connected with the controller, and the controller is also electrically connected with the coil on the iron core; the pressure sensor is used for detecting the working pressure in the valve body, the controller is provided with a pressure threshold value in the furnace tank, and when the working pressure value detected by the pressure sensor is lower than the threshold value, the coil is electrified, and the iron core generates suction force; when the working pressure value detected by the pressure sensor is larger than the threshold value, the coil is powered off, and the iron core cannot generate suction force.

Preferably, the first spring is in an initial stretching state, the upper valve body cover is clung to the valve body under the action of the elastic force of the first spring, and the outline of the joint of the upper valve body cover and the valve body can be matched with each other; when the working pressure in the valve body is lower than a threshold value set on the controller, the controller energizes the coil, the iron core and the armature attract each other, the second spring is in a compressed state, and the plug blocks the through hole on the partition plate; when the working pressure in the valve body is larger than a set threshold value, the controller can cut off the power of the coil, the iron core and the iron core are not attracted any more, the plug on the partition plate is opened, the gas in the valve body can extrude the upper cover of the valve body, a gap can be generated between the upper cover of the valve body and the valve body, and the pressure in the valve body can be reduced.

By setting the safety valve, the air pressure in the furnace tank is in a normal working range and cannot exceed the design air pressure of the furnace body, so that the safety of the whole heat treatment furnace is ensured.

Preferably, the furnace cover is provided with a mounting bracket, and the mounting bracket is provided with a thermal circulation device; the heat circulating device comprises a driving motor and a fan, and the driving motor is fixed on the mounting bracket; a shaft coupling is arranged on a motor shaft of the driving motor, the shaft coupling is connected with a transmission rod, and the tail end of the transmission rod is connected with a fan; the furnace cover is provided with a fixed seat, a connecting channel is arranged in the middle of the furnace cover, and the transmission rod sequentially penetrates through the fixed seat and the connecting channel and then extends into the furnace cover; the inner ring of the fixed seat is provided with a connecting bearing bush, the inner ring of the connecting bearing bush is provided with a first bearing, and the transmission rod penetrates through the center of the first bearing; a sealing ring is arranged in the connecting channel, a second bearing is arranged right below the sealing ring, and the transmission rod penetrates through the second bearing and the center of the sealing ring; the lower surface of the sealing ring and the upper surface of the second bearing are mutually attached, and the lower surface of the second bearing and the lower surface of the furnace cover are positioned on the same plane.

Preferably, the first bearing, the second bearing, the sealing ring, the fixing seat, the connecting bearing bush, the coupling and the transmission rod are kept in a coaxial state, and the transmission rod and a connecting channel in the center of the furnace cover are kept in a coaxial state.

Through setting the thermal cycle device, the gas in the furnace cover can flow in the furnace tank fully, so that the gas can be in better contact with the metal material.

Preferably, a lifting rotating device is arranged on the side surface of the furnace body, and the lifting rotating device comprises an installation base, a rotating motor and a connecting platform; the installation base is fixed on the side face of the furnace body, a telescopic rod is arranged in the installation base and movably connected with the connecting platform, the telescopic rod penetrates through an installation hole in the connecting platform and then is fixed through a first retaining ring and a second retaining ring, and the connecting platform rotates by taking the telescopic rod as an axis; the connecting platform on be equipped with the platform bottom surface, the platform bottom surface on be equipped with the rotating electrical machines, the rotating electrical machines on be equipped with the second gear, the telescopic link on be equipped with first gear, first gear and second gear intermeshing.

Through setting for the lifting and rotating device, the furnace cover and the thermal cycling device on the furnace cover can be integrally lifted and rotated, so that the furnace cover is convenient to open, and the discharging or material taking process is more convenient.

Compared with the prior art, the utility model has the following beneficial effects: the metal heat treatment furnace is provided with the thermal rotating device, so that gas in the furnace can be fully contacted with metal materials, and the heat treatment effect is better; a safety valve is arranged above the furnace cover, so that the air pressure in the furnace can be in a normal working state, and the safety is improved; meanwhile, the side face of the furnace body is provided with the lifting and rotating device, the lifting of the furnace cover can be controlled through a hydraulic system, and the rotation of the furnace cover can be controlled through a motor, so that the furnace cover can be conveniently opened or closed, a worker does not need to difficultly open the furnace cover, the labor is saved, and the material discharging or taking process of the worker is facilitated.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is an exploded view of FIG. 1

FIG. 3 is an enlarged view of a portion of the structure A of FIG. 2;

FIG. 4 is a front view of the exploded view of FIG. 2;

FIG. 5 is a cross-sectional view taken at view B-B of FIG. 4;

FIG. 6 is a schematic view of the connection of the safety valve and the furnace lid;

FIG. 7 is a cross-sectional view taken at view C-C of FIG. 6;

FIG. 8 is an enlarged partial view of the structure D of FIG. 7;

FIG. 9 is a front view of the perspective view of FIG. 1;

FIG. 10 is a cross-sectional view taken at E-E of FIG. 9;

FIG. 11 is an enlarged partial view of the structure G of FIG. 10;

FIG. 12 is a perspective view of a safety valve part;

the labels in the figure are: 1. a furnace body; 2. sealing the upper cover; 3. a furnace cover; 31. a connecting channel; 32. the lower surface of the furnace cover; 4. mounting a bracket; 5. a thermal cycling device; 51. a drive motor; 52. a first bearing; 53. connecting the bearing bush; 54. a seal ring; 55. a second bearing; 56. a coupling; 57. a transmission rod; 58. a fixed seat; 59. a fan; 6. a lifting and rotating device; 61. installing a base; 62. a telescopic rod; 63. a first gear; 64. a first retainer ring; 65. connecting the platform; 651. a platform bottom surface; 66. mounting holes; 67. a second retainer ring; 68. a second gear; 69. a rotating electric machine; 7. an annular groove; 8. a safety valve; 81. a first spring; 82. a valve body upper cover; 83. a support platform; 84. a partition plate; 85. a plug; 86. a first connecting rod; 87. an armature; 88. a coil; 89. an iron core; 810. a second spring; 811. connecting blocks; 812. a limiting groove; 813. a limiting block; 815. a second connecting rod; 816. a valve body; 817. a pressure sensor; 9. a heating element; 10. a thermocouple; 11. a furnace pot; 12. a furnace lining; 13. a material placing frame; 14. an air outlet; 15. fixing the rod; 16. and (4) a bump.

Detailed Description

The utility model will be further described with reference to examples of embodiments shown in the drawings to which:

example 1

As shown in fig. 1 to 12, a metal heat treatment furnace comprises a furnace body 1 and a furnace pot 11, wherein a sealing upper cover 2 is arranged above the furnace body 1, a furnace cover 3 is arranged on the sealing upper cover 2, an air outlet 14 is arranged on the furnace cover 3, and a safety valve 8 is arranged right above the air outlet 14; the center of the furnace cover 3 is provided with a connecting channel 31, the furnace cover 3 is provided with a mounting bracket 4, the mounting bracket 4 is provided with a thermal cycling device 5, and the thermal cycling device 5 comprises a driving motor 51, a transmission rod 57 and a fan 59; the transmission rod 57 penetrates through the connecting channel 31 in the center of the furnace cover 3, and the fan 59 is connected with the transmission rod 57; the side surface of the furnace body 1 is provided with a lifting and rotating device 6, the lifting and rotating device 6 is provided with a connecting platform 65, the connecting platform 65 is connected with the mounting bracket 4 through a fixed rod 15, and after the lifting and rotating device 6 works, the furnace cover 3 and the sealing upper cover 2 are driven to lift or rotate together; a furnace lining 12 is arranged in the furnace body 1, a thermocouple 10 and a heating element 9 are arranged on the inner side wall of the furnace lining 12, the thermocouple 10 is used for detecting the actual working temperature in the furnace body 1, a controller is arranged on the furnace cover 3, the controller is respectively and electrically connected with the thermocouple 10 and the heating element, and the thermocouple 10 can feed back the detected actual working temperature to the controller; an annular groove 7 is formed in the furnace lining 12, a furnace pot 11 is arranged inside the furnace lining 12, and the furnace pot 11 is placed in the annular groove 7; the furnace pot 11 inside wall be equipped with lug 16, furnace pot 11 in be equipped with blowing frame 13, blowing frame 13 place on lug 16.

The safety valve 8 is arranged right above the air outlet 14 of the furnace cover 3, the safety valve 8 comprises a valve body 816 and a valve body upper cover 82, a first spring 81 is arranged below the valve body upper cover 82, and a supporting platform 83 is arranged in the valve body 816; one end of the first spring 81 is fixedly connected with the valve body upper cover 82, the other end of the first spring 81 is fixedly connected with the supporting platform 83, and the first spring 81 is initially in a stretching state; a partition plate 84 is arranged under the supporting platform 83, a through hole is formed in the partition plate 84, a plug 85 for controlling the opening and closing of the through hole is further arranged above the partition plate 84, a first connecting rod 86 is arranged at the lower end of the plug 85, and an armature 87 is arranged below the first connecting rod 86; two second connecting rods 815 which are symmetrical to each other are arranged on the side surface of the armature 87, a limiting block 813 is arranged at the tail end of each second connecting rod 815, a connecting block 811 is arranged on the inner side wall of the valve body 816, a limiting groove 812 is arranged on each connecting block 811, each limiting block 813 is clamped in each limiting groove 812, and each limiting block 813, each second connecting rod 815 and the armature 87 synchronously move in each limiting groove 812; the lower end of the armature 87 is provided with a second spring 810, one end of the second spring 810 is fixedly connected with the armature 87, and the other end of the second spring 810 is fixedly connected with the inner wall of the valve body 816; an iron core 89 is arranged right below the armature 87, a coil 88 is wound on the iron core 89, the iron core 89 is fixed inside the valve body 816, and a pressure sensor 817 is further arranged inside the valve body 816; the furnace cover 3 is provided with a controller, the pressure sensor 817 is electrically connected with the controller, and the controller is also electrically connected with the coil 88 on the iron core 89; the pressure sensor 817 is used for detecting the working pressure in the valve body 816, the controller is provided with a pressure threshold value in the furnace pot 11, and when the working pressure value detected by the pressure sensor 817 is lower than the pressure threshold value in the furnace pot 11, the coil 88 is electrified, and the iron core 89 generates suction force; when the working pressure value detected by the pressure sensor 817 is greater than the pressure threshold value in the furnace pot 11, the coil 88 is powered off, and the iron core 89 cannot generate suction force; the first spring 81 is in an initial stretching state, the valve body upper cover 82 is tightly attached to the valve body 816 under the action of the elastic force of the first spring 81, and the outline of the joint of the valve body upper cover 82 and the valve body 816 can be matched with each other; when the pressure in the valve 816 is lower than the pressure threshold value in the furnace tank 11 set on the controller, the controller energizes the coil 88, the iron core 89 and the armature 87 attract each other, the second spring 810 is in a compressed state, and the plug 85 plugs the through hole on the partition 84; when the working pressure in the valve body 816 is greater than the set pressure threshold value in the furnace can 11, the controller can cut off the power of the coil 88, the iron core 89 and the iron core are not attracted to each other any more, the plug 85 on the partition plate 84 can be opened, the gas in the valve body 816 can extrude the valve body upper cover 82, a gap can be generated between the valve body upper cover 82 and the valve body 816, and the pressure in the valve body 816 can be reduced.

At present, according to the national standard of manufacturing and inspection of a furnace pot 11, the following parameters need to be set, the working pressure in the furnace pot 11 of the heat treatment furnace designed according to the national standard of inspection is P, the design pressure of the furnace pot 11 is PS, the setting pressure PZ of a safety valve 8 is a pressure value for disengaging the safety valve 8, the sealing pressure of the safety valve 8 is PT, the sealing pressure PT is 90% of the setting pressure value of the safety valve 8, the maximum working pressure of the furnace pot 11 is PM, the design pressure PS and the setting pressure PZ are determined values after the product is manufactured, the design pressure PS is greater than the setting pressure PZ, the setting pressure PZ is greater than the sealing pressure PT, the sealing pressure PT is greater than the maximum working pressure PM, the threshold value of the furnace pot 11 set on a controller is just equal to the maximum working pressure PM, when the working pressure P in the furnace 11 is smaller than the set furnace internal pressure threshold value, the controller controls the coil 88 to be electrified; when the working pressure P in the furnace 11 is larger than the set pressure threshold value in the furnace 11, the controller controls the coil 88 to be electrified.

The furnace cover 3 is provided with a mounting bracket 4, and the mounting bracket 4 is provided with a thermal circulation device 5; the heat circulating device 5 comprises a driving motor 51 and a fan 59, wherein the driving motor 51 is fixed on the mounting bracket 4; a shaft coupling 56 is arranged on a motor shaft of the driving motor 51, the shaft coupling 56 is connected with a transmission rod 57, and the tail end of the transmission rod 57 is connected with a fan 59; the furnace cover 3 is provided with a fixed seat 58, the middle of the furnace cover 3 is provided with a connecting channel 31, and the transmission rod 57 sequentially penetrates through the fixed seat 58 and the connecting channel 31 and then extends into the furnace cover 3; the inner ring of the fixed seat 58 is provided with a connecting bush 53, the inner ring of the connecting bush 53 is provided with a first bearing 52, and the transmission rod 57 penetrates through the center of the first bearing 52; a sealing ring 54 is arranged in the connecting channel 31, a second bearing 55 is arranged right below the sealing ring 54, and a transmission rod 57 penetrates through the second bearing 55 and the center of the sealing ring 54; the lower surface of the sealing ring 54 and the upper surface of the second bearing 55 are mutually attached, and the lower surface of the second bearing 55 and the lower surface 32 of the furnace cover are positioned on the same plane; the first bearing 52, the second bearing 55, the sealing ring 54, the fixed seat 58, the connecting bush 53, the coupling 56 and the transmission rod 57 are kept in a coaxial state, and the transmission rod 57 and the connecting channel 31 in the center of the furnace cover 3 are kept in a coaxial state.

The side surface of the furnace body 1 is provided with a lifting and rotating device 6, and the lifting and rotating device 6 comprises a mounting base 61, a rotating motor 69 and a connecting platform 65; the installation base 61 is fixed on the side surface of the furnace body 1, an expansion link 62 is arranged in the installation base 61, the expansion link 62 is movably connected with a connection platform 65, the expansion link 62 passes through an installation hole 66 on the connection platform 65 and then is fixed through a first retaining ring 64 and a second retaining ring 67, and the connection platform 65 rotates by taking the expansion link 62 as an axis; the connecting platform 65 is provided with a platform bottom face 651, the platform bottom face 651 is provided with a rotating motor 69, the rotating motor 69 is provided with a second gear 68, the telescopic rod 62 is provided with a first gear 63, and the first gear 63 and the second gear 68 are meshed with each other.

Specifically, after a metal material needing heat treatment is prepared, the furnace cover 3 is opened through the lifting and rotating device 6 on the side surface of the furnace body 1, the metal material is placed in the discharge frame 13, and then the furnace cover 3 is closed; opening the heating element 9 on the side wall of the furnace lining 12 to raise the whole temperature inside the furnace body 1, and then opening the thermal circulation device 5 to make the gas in the furnace tank 11 flow; as the temperature increases, the working pressure in the furnace vessel 11 will rise; when the working pressure is lower than the threshold value set on the controller, the plug 85 on the safety valve 8 keeps a closed state; when the working pressure is greater than the threshold value set by the controller, the plug 85 on the safety valve 8 is opened, the gas in the safety valve 8 extrudes the valve body upper cover 82, a gap is formed between the valve body upper cover 82 and the valve body 816, and thus the gas pressure in the valve body 816 is reduced; as the safety valve 8 is opened, the air pressure in the valve body 816 decreases, and when the working pressure in the valve body 816 is lower than the threshold value set by the controller, the plug 85 on the safety valve 8 keeps closed, so that the safety valve 8 keeps closed.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims (7)

1. A metal heat treatment furnace comprises a furnace body (1) and a furnace pot (11), and is characterized in that a sealing upper cover (2) is arranged above the furnace body, a furnace cover (3) is arranged on the sealing upper cover, an air outlet (14) is arranged on the furnace cover, and a safety valve (8) is arranged right above the air outlet; a connecting channel (31) is arranged at the center of the furnace cover, a mounting bracket (4) is arranged on the furnace cover, a thermal circulation device (5) is arranged on the mounting bracket, and the thermal circulation device comprises a driving motor (51), a transmission rod (57) and a fan (59); the transmission rod penetrates through a connecting channel in the center of the furnace cover, and the fan is connected with the transmission rod; the furnace body is characterized in that a lifting rotating device (6) is arranged on the side face of the furnace body, a connecting platform (65) is arranged on the lifting rotating device, the connecting platform is connected with the mounting bracket through a fixing rod (15), and after the lifting rotating device works, the furnace cover and the sealing upper cover are driven to lift or rotate together; a furnace lining (12) is arranged in the furnace body, a thermocouple (9) and a heating element (10) are arranged on the inner side wall of the furnace lining, a controller is arranged on the furnace cover, and the controller is respectively and electrically connected with the thermocouple and the heating element; an annular groove (7) is formed in the furnace lining, a furnace pot is arranged inside the furnace lining, and the furnace pot is placed in the annular groove; the furnace pot is characterized in that a convex block (16) is arranged on the inner side wall of the furnace pot, a discharging frame (13) is arranged in the furnace pot, and the discharging frame is placed on the convex block.

2. The metal heat treatment furnace according to claim 1, wherein the safety valve (8) is arranged right above the gas outlet of the furnace cover, the safety valve comprises a valve body (816) and a valve body upper cover (82), a first spring (81) is arranged below the valve body upper cover, and a supporting platform (83) is arranged in the valve body; one end of the first spring is fixedly connected with the upper cover of the valve body, the other end of the first spring is fixedly connected with the supporting platform, and the first spring is initially in a stretching state; a partition plate (84) is arranged right below the supporting platform, a through hole is formed in the partition plate, a plug (85) used for controlling the opening and closing of the through hole is further arranged right above the partition plate, a first connecting rod (86) is arranged at the lower end of the plug, and an armature (87) is arranged below the first connecting rod; two second connecting rods (815) which are symmetrical to each other are arranged on the side face of the armature, a limiting block (813) is arranged at the tail end of each second connecting rod, a connecting block (811) is arranged on the inner side wall of the valve body, a limiting groove (812) is arranged on each connecting block, each limiting block is clamped in each limiting groove, and each limiting block, each second connecting rod and each armature synchronously move in each limiting groove; a second spring (810) is arranged at the lower end of the armature, one end of the second spring is fixedly connected with the armature, and the other end of the second spring is fixedly connected with the inner wall of the valve body; under armature be equipped with iron core (89), the iron core on around coil (88), the iron core fix inside the valve body, inside pressure sensor (817) that still is equipped with of valve body.

3. The metal heat treatment furnace according to claim 2, wherein a controller is arranged on the furnace cover, the pressure sensor is electrically connected with the controller, and the controller is also electrically connected with the coil on the iron core; the pressure sensor is used for detecting the working pressure in the valve body, the controller is provided with a pressure threshold value in the furnace tank, and when the working pressure value detected by the pressure sensor is lower than the pressure threshold value in the furnace tank, the coil is electrified, and the iron core generates suction force; when the working pressure value detected by the pressure sensor is larger than the pressure threshold value in the furnace cover, the coil is powered off, and the iron core cannot generate suction.

4. The metal heat treatment furnace according to claim 2, wherein the first spring is in an initial stretching state, the upper cover of the valve body is tightly attached to the valve body under the action of the elastic force of the first spring, and the outline of the joint of the upper cover of the valve body and the valve body can be matched with each other; when the working pressure in the valve body is lower than a pressure threshold value in a furnace tank set on the controller, the controller energizes the coil, the iron core and the armature attract each other, the second spring is in a compressed state, and the plug blocks the through hole in the partition plate; when the working pressure in the valve body is larger than the set pressure threshold value in the furnace tank, the controller can cut off the power of the coil, the iron core and the iron core are not attracted any more, the plug on the partition plate is opened, the gas in the valve body can extrude the upper cover of the valve body, a gap can be generated between the upper cover of the valve body and the valve body, and the pressure in the valve body can be reduced.

5. The metal heat treatment furnace according to claim 1, wherein a mounting bracket is arranged on the furnace cover, and a heat circulating device (5) is arranged on the mounting bracket; the heat circulating device comprises a driving motor (51) and a fan (59), and the driving motor is fixed on the mounting bracket; a shaft coupling (56) is arranged on a motor shaft of the driving motor, the shaft coupling is connected with a transmission rod (57), and the tail end of the transmission rod is connected with a fan; a fixed seat (58) is arranged on the furnace cover, a connecting channel (31) is arranged in the middle of the furnace cover, and the transmission rod sequentially penetrates through the fixed seat and the connecting channel and then extends into the furnace cover; the inner ring of the fixed seat is provided with a connecting bearing bush (53), the inner ring of the connecting bearing bush is provided with a first bearing (52), and the transmission rod penetrates through the center of the first bearing; a sealing ring (54) is arranged in the connecting channel, a second bearing (55) is arranged right below the sealing ring, and the transmission rod penetrates through the centers of the second bearing and the sealing ring; the lower surface of the sealing ring and the upper surface of the second bearing are mutually attached, and the lower surface of the second bearing and the lower surface (32) of the furnace cover are positioned on the same plane.

6. The furnace for heat treatment of metals according to claim 5, wherein the first bearing, the second bearing, the sealing ring, the fixing seat, the connecting bushing, the coupling and the transmission rod are maintained in a coaxial state, and the connecting passage between the transmission rod and the center of the furnace cover is maintained in a coaxial state.

7. The metal heat treatment furnace according to claim 1, wherein the side of the furnace body is provided with a lifting and rotating device (6), and the lifting and rotating device comprises a mounting base (61), a rotating motor (69) and a connecting platform (65); the furnace body is characterized in that the mounting base is fixed on the side face of the furnace body, a telescopic rod (62) is arranged in the mounting base, the telescopic rod is movably connected with the connecting platform, the telescopic rod penetrates through a mounting hole (66) in the connecting platform and then is fixed through a first retaining ring (64) and a second retaining ring (67), and the connecting platform rotates by taking the telescopic rod as an axis; the connecting platform on be equipped with platform bottom surface (651), the platform bottom surface on be equipped with rotating electrical machines (69), rotating electrical machines on be equipped with second gear (68), the telescopic link on be equipped with first gear (63), first gear and second gear intermeshing.

Images