CN116904728A - Heat preservation stove of spring is rolled up to heat - Google Patents

Abstract

The invention discloses a heat preservation furnace with a hot coil spring, which comprises a heat preservation furnace body, an opening and closing device, a rotating device and a lifting device, wherein the heat preservation furnace body is placed on the ground; a round hole-shaped feeding and discharging hole with a vertical opening is formed on the upper side wall of the furnace body; the opening and closing device comprises an opening and closing seat horizontally arranged on the upper end surface of the furnace body and an opening and closing moving mechanism for driving the opening and closing seat; the rotating device comprises a disc-shaped rotating disc which is coaxially and rotatably connected to the bottom of the inside of the furnace body, and a rotating driving mechanism for driving the rotating disc to intermittently rotate at equal angles; a plurality of circumferentially uniformly distributed mounting grooves are formed on the rotating disc; the feeding and discharging holes are coaxially arranged with one of the placement grooves; a spring placement seat is placed in the placement groove from top to bottom; the lifting device is used for driving the spring placement seat positioned right below the feeding and discharging holes to vertically lift; the size of the spring setting seat is larger than the size of the feeding hole and the discharging hole. When the heat release coil spring is taken out, the spring placement seat blocks the material inlet and outlet holes, so that heat loss is reduced.

Description

Heat preservation stove of spring is rolled up to heat

Technical Field

The invention relates to the field of heat preservation furnaces for hot coil springs, in particular to a heat preservation furnace for a hot coil spring.

Background

The diameter of the bearing spring of the iron ore transport vehicle is thicker, and the spring production generally adopts a hot rolling process; and the heat treatment is needed in the manufacturing and production process of the heat coil spring so as to obtain the corresponding side performance, and a heat preservation furnace is needed in the heat treatment process of the heat coil spring, so that the heat preservation furnace ensures that the structure of the spring is more completely transformed in the heat treatment process, thereby improving the heat treatment effect.

In the existing heat preservation furnace, the heat preservation furnace is closed through a vertically moving gate, and when the heat preservation furnace is fed and discharged, the gate is always in an open state, and an operator clamps the hot coil spring through a tool so as to take the hot coil spring.

In the related art, because the area of the gate is large, when the gate is in an open state, the heat exchange area between the heat preservation furnace and the external environment can be large, so that the heat loss of the heat preservation furnace is large, and meanwhile, the operation of operators is too slow, so that the heat loss can be increased, the temperature change in the heat preservation furnace is large, and the heat preservation of the heat coil spring is not facilitated.

Disclosure of Invention

The invention provides a heat preservation furnace with a hot coil spring, which aims to reduce heat loss of the heat preservation furnace during feeding and discharging.

The invention provides a heat-preserving furnace for a hot coil spring, which adopts the following technical scheme:

a heat-preserving furnace with a hot coil spring comprises a heat-preserving furnace body, an opening and closing device, a rotating device and a lifting device, wherein the heat-preserving furnace body, the opening and closing device, the rotating device and the lifting device are placed on the ground; the heat preservation furnace body comprises a cylindrical furnace body with a hollow inside; a heating mechanism is arranged in the furnace body; a round hole-shaped feeding and discharging hole vertically penetrated by the heat supply coil spring with a vertical opening is formed on the upper side wall of the furnace body; the opening and closing device comprises an opening and closing seat horizontally arranged on the upper end surface of the furnace body and an opening and closing moving mechanism for driving the opening and closing seat; the opening and closing seat is used for closing the material inlet and outlet holes; the rotating device comprises a disc-shaped rotating disc which is coaxially and rotatably connected to the bottom of the inside of the furnace body, and a rotating driving mechanism for driving the rotating disc to intermittently rotate at equal angles; a plurality of circumferentially uniformly distributed placement grooves are formed on the rotating disc; the feeding and discharging holes and one of the placement grooves are coaxially arranged; a spring placement seat is placed in the placement groove from top to bottom; the lifting device is used for driving the spring placement seat positioned right below the feeding hole and the discharging hole to vertically lift; when the spring placement seat is at the uppermost end, the spring placement seat blocks the feeding and discharging holes.

By adopting the technical scheme, the hot coil spring is positioned in the furnace body and is arranged on the spring arranging seat, and intermittently rotates along with the rotating disc; when discharging, firstly, the opening and closing seat horizontally moves to open the feeding and discharging holes, then the lifting device drives the spring setting seat and the hot coil spring on the spring setting seat to rise together until the spring setting seat abuts against the upper side wall of the furnace body and closes the feeding and discharging holes, at the moment, the hot coil spring is exposed out of the upper end face of the furnace body, and an operator takes out the hot coil spring by using a clamp and puts a new hot coil spring; then the spring setting seat descends to return, and the opening and closing seat horizontally moves to close the feeding and discharging holes; when the heat-releasing coiled spring is taken out, the spring mounting seat blocks the feeding and discharging holes, so that heat loss is reduced, and meanwhile, the heat loss can be reduced due to the smaller diameter of the feeding and discharging holes.

Optionally, the device further comprises an enclosing device; the enclosure means comprises a pair of symmetrically disposed enclosure mechanisms; the surrounding mechanism comprises a surrounding seat horizontally arranged on the upper end surface of the furnace body in a moving way and a horizontal driving assembly for driving the surrounding seat; a pair of the horizontal driving assemblies drive a pair of the surrounding seats to move away from or approach each other; a pair of surrounding seats are formed with semicircular column groove-shaped surrounding grooves on the end surfaces close to each other, and the lower ends of the surrounding grooves are provided with openings; when a pair of surrounding seats are close to each other, a pair of surrounding grooves form a complete cylindrical groove; the cylindrical groove and the feeding and discharging holes are coaxially arranged, and the diameter of the cylindrical groove is larger than that of the feeding and discharging holes.

By adopting the technical scheme, during normal heat preservation, a pair of surrounding seats are far away from each other, and then after the opening and closing seat opens the feeding and discharging holes, the pair of surrounding seats are close to each other until the two mutually abut against each other, so that the feeding and discharging holes are covered; therefore, in the rising process of the hot coil spring, the air flow is effectively reduced, and the heat exchange is reduced.

Optionally, a sealing insertion frame with a downward opening is formed on the end surface of one surrounding seat facing the other surrounding seat; the end face of the corresponding side of the other surrounding seat is provided with a U-shaped sealing slot with a downward opening for the sealing plug frame to be horizontally inserted.

Through adopting above-mentioned technical scheme, when a pair of surrounding seat supports each other, sealed insert the frame and insert in the sealed slot, improved the leakproofness like this, further reduced the air flow, reduced the exchange of heat.

Optionally, the opening and closing seat comprises an outer opening and closing seat and an inner opening and closing plate; a vertical moving groove for vertically moving the inner opening and closing plate is formed on the lower end surface of the outer opening and closing seat; a plurality of uniformly distributed pressure springs are arranged between the upper end surface of the inner opening and closing plate and the upper side wall of the vertical moving groove; the upper end of the pressure spring is fixed on the upper side wall of the vertical moving groove, and the lower end of the pressure spring abuts against the upper end face of the inner opening and closing plate; the size of the inner opening and closing plate is larger than the size of the feeding hole and the discharging hole.

By adopting the technical scheme, the pressure spring can generate downward pressure on the inner opening and closing plate, so that the tightness of the inner opening and closing plate is improved.

Optionally, the heating mechanism comprises a plurality of vertically arranged external heating rods fixed between the upper side wall and the lower side wall of the furnace body; all the external heating rods are positioned on the outer side of the rotating disc and are uniformly distributed around the rotating central shaft of the rotating disc.

Through adopting above-mentioned technical scheme, the external heating rod evenly distributed is around the rotary disk for the inside heating of holding furnace is more even, is favorable to reducing the inside difference in temperature of holding furnace.

Optionally, the heating mechanism further comprises a plurality of vertically arranged inner heating rods fixed on the upper side wall of the furnace body; all the inner heating rods are positioned right above the rotating disc and are uniformly distributed around the rotating central shaft of the rotating disc; the spring seat is located between the outer heating rod and the inner heating rod.

Through adopting above-mentioned technical scheme, the existence of interior heating rod makes the inside heating of holding furnace more even, is favorable to reducing the inside difference in temperature of holding furnace.

Optionally, the upper and lower openings of the placement groove are formed; the mounting groove consists of a pair of coaxially arranged round holes which are distributed up and down, and the diameter of the round hole on the upper side is larger than that of the round hole on the lower side; the spring mounting seat comprises a cylindrical upper mounting part at the upper side and a cylindrical lower mounting part at the lower side; the diameter of the upper placement part is the same as that of the upper part of the placement groove; the diameter of the lower placement part is the same as that of the lower part of the placement groove; a lifting connecting slot is formed on the lower end surface of the lower placement part; the lifting device comprises a lifting supporting seat and a lifting driving mechanism for driving the lifting supporting seat to vertically lift; the lifting support seat is positioned right below the feeding hole and the discharging hole; the size of the lifting supporting seat is smaller than the size of the circular hole at the lower side of the placement groove; the upper end of the lifting supporting seat is provided with a lifting connecting plug block matched with the lifting connecting slot.

By adopting the technical scheme, the lifting driving mechanism drives the lifting supporting seat to ascend, in the ascending process, the lifting connecting plug of the lifting supporting seat is firstly vertically inserted into the lifting connecting slot of the spring placing seat, and then the spring placing seat ascends along with the lifting supporting seat; in the descending process, the lifting support seat firstly passes through the mounting groove, then the spring mounting seat enters the mounting groove and stays in the mounting groove, and thus the lifting support seat is separated, and the rotation of the rotating disc is not influenced.

Optionally, a cylindrical groove-shaped spring accommodating groove for vertically inserting the heat supply coil spring is formed on the upper end surface of the upper accommodating part.

Through adopting above-mentioned technical scheme, the bottom of hot coil spring is located the spring setting inslot, and like this at rotary disk rotation in-process and spring setting seat lift in-process, hot coil spring can keep stable, is difficult for unexpected dropping.

Optionally, the rotation speed of the rotating disc is adjustable.

Through adopting above-mentioned technical scheme, the rotation speed of rotary disk is adjustable to be set up, can adjust the heat preservation time of hot coil spring.

Optionally, a plurality of reflection plates with evenly distributed circumferences are embedded on the lower end surface of the rotating disk; the reflecting plates are in one-to-one correspondence with the mounting grooves; a photoelectric switch is arranged on the lower side wall of the furnace body; the photoelectric switch is opposite to the reflecting plate matched with the placement groove right below the feeding hole and the discharging hole; the photoelectric switch is used for controlling the lifting device.

Through adopting above-mentioned technical scheme, when photoelectric switch just to the reflecting plate of corresponding side, photoelectric switch control elevating gear starts, elevating gear drive like this is located the spring setting seat of advance under the discharge port and goes up and down to be favorable to driving accurate spring setting seat and goes up and down.

In summary, the beneficial effects of the invention are as follows:

1. when the heat-releasing coiled spring is taken out, the spring placement seat blocks the feeding and discharging holes, so that heat loss is reduced.

2. In the rising process of the hot coil spring, the pair of surrounding seats cover the feeding and discharging holes, so that the air flow is effectively reduced, and the heat exchange is reduced.

Drawings

Fig. 1 is a schematic cross-sectional view of the present invention.

Fig. 2 is a schematic top view of the holding furnace body 20 according to the present invention.

Fig. 3 is a schematic cross-sectional view of an enclosure 71 according to the present invention.

Fig. 4 is a schematic view of the structure of the section A-A of fig. 1 according to the present invention.

Fig. 5 is a schematic bottom view of the rotary disk 44 of the present invention.

Fig. 6 is a schematic sectional view of the spring seat 45 and the elevation support 52 of the present invention.

Reference numerals illustrate:

10. ground surface; 100. driving the avoidance groove; 101. a furnace body placement groove;

20. a heat preservation furnace body; 21. a furnace body; 210. a feeding and discharging hole; 22. a thermal insulation layer; 23. an external heating rod; 231. an outer connecting seat; 24. an inner heating rod; 241. an inner connecting seat;

30. opening and closing means; 31. opening and closing the movable cylinder; 32. an opening and closing seat; 321. an external opening and closing seat; 322. a pressure spring; 323. an inner opening/closing plate;

40. a rotating device; 41. a lower support plate; 42. rotating the center column; 421. a driven gear; 43. a rotary drive motor; 431. a drive gear; 44. a rotating disc; 440. a placement groove; 441. a reflection plate; 45. a spring mounting seat; 451. an upper mounting portion; 4510. a spring mounting groove; 452. a lower mounting portion; 4520. lifting the connecting slot;

50. a lifting device; 51. a lifting driving cylinder; 52. lifting the supporting seat; 521. lifting the bottom plate; 522. lifting the connecting plug block;

60. an optoelectronic switch;

70. a surrounding mechanism; 71. surrounding the seat; 710. sealing the slot; 711. sealing the inserting frame; 72. the cylinder is driven horizontally.

Detailed Description

The invention is described in further detail below with reference to fig. 1-6.

Referring to fig. 1, a heat preservation furnace of a heat coil spring includes a heat preservation furnace body 20 placed on a floor 10, an opening and closing device 30, a rotating device 40, and a lifting device 50; the ground 10 is provided with a furnace body placement groove 101 for vertically inserting the heat preservation furnace body 20; the holding furnace body 20 comprises a cylindrical furnace body 21 with a hollow inside; a round hole-shaped feeding and discharging hole 210 with a vertical opening is formed on the upper side wall of the furnace body 21; the diameter of the feeding and discharging hole 210 is 1.1 times of the outer diameter of the hot coil spring; the opening and closing device 30 is used for opening and closing the feeding and discharging holes 210; the rotating device 40 comprises a disc-shaped rotating disc 44 coaxially and rotatably connected to the inner bottom of the furnace body 21, and a rotation driving mechanism for driving the rotating disc 44 to intermittently rotate at equal angles; the rotary disk 44 is used for placing the hot coil spring; the lifting device 50 is used for driving the hot coil spring vertically to pass through the feeding and discharging hole 210.

Referring to fig. 1 and 4, a heat insulating layer 22 is provided on an inner sidewall of the furnace body 21; a heating mechanism is arranged in the furnace body 21; the heating mechanism comprises an external heating component and an internal heating component; the external heating assembly comprises a plurality of external heating rods 23 which are uniformly distributed around the rotation central shaft of the furnace body 21; the inner heating assembly comprises a plurality of inner heating rods 24 which are uniformly distributed around the rotation center shaft of the furnace body 21; the inner heating component is positioned on the inner side of the outer heating component; the external heating rod 23 is positioned outside the rotating disc 44, and the upper end and the lower end are fixed with external connecting seats 231; the external heating rod 23 is vertically arranged and the external connection seat 231 on the upper side thereof is fixed on the upper side wall of the furnace body 21 and the external connection seat 231 on the lower side thereof is fixed on the lower side wall of the furnace body 21; the inner heating rod 24 is positioned on the upper side of the rotating disc 44 and is fixed with an inner connecting seat 241 at the upper end thereof; the inner connecting seat 241 is fixed on the upper side wall of the furnace body 21; in operation, the distribution of the external heating assembly and the internal heating assembly makes the temperature in the furnace body 21 more uniform.

Referring to fig. 1 and 2, the opening and closing device 30 includes an opening and closing seat 32 provided on an upper end surface of the furnace body 21 to be horizontally moved, and an opening and closing movement mechanism for driving the opening and closing seat 32; the opening and closing movement mechanism comprises an opening and closing movement electric cylinder 31 fixed on the upper end surface of the furnace body 21; the shutter 32 includes an outer shutter 321 and an inner shutter 323; a vertical movement groove for vertically moving the inner opening and closing plate 323 is formed on the lower end surface of the outer opening and closing seat 321; a plurality of uniformly distributed compression springs 322 are arranged between the upper end surface of the inner opening and closing plate 323 and the upper side wall of the vertical moving groove; the upper end of the pressure spring 322 is fixed on the upper side wall of the vertical moving groove, and the lower end of the pressure spring is propped against the upper end surface of the inner opening and closing plate 323; the inner opening and closing plate 323 is a circular plate and has a diameter larger than that of the inlet and outlet holes 210; the outside opening/closing seat 321 is fixed to a piston rod of the opening/closing movement cylinder 31. When in operation, the inner opening and closing plate 323 is collinear with the rotation central axis of the feeding and discharging hole 210, and the inner opening and closing plate 323 is tightly attached to the upper end surface of the furnace body 21 under the action of the pressure spring 322; in addition, when the inner opening and closing plate 323 is unexpectedly moved upward, the outer opening and closing seat 321 can also function to close the inlet and outlet holes 210.

Referring to fig. 1, a driving avoidance groove 100 is formed on the bottom surface of a furnace body installation groove 101; the rotation driving mechanism includes a rotation driving motor 43 and a rotation center post 42; a lower support plate 41 is fixed on the bottom surface of the driving avoidance groove 100; the lower end of the rotation center column 42 is rotatably connected to the lower support plate 41 through a bearing, and the upper part vertically passes through the upper side wall of the furnace body 21 and is rotatably connected through a bearing; the rotating disk 44 is coaxially fixed at the upper end of the rotating center column 42; a driving gear 431 is fixed to an output shaft of the rotary drive motor 43; a driven gear 421 is fixed to the rotation center post 42; the driving gear 431 is engaged with the driven gear 421; the rotation driving motor 43 is a stepping motor and is set with an adjustable rotation speed. In operation, the rotary driving motor 43 drives the driven gear 421 to intermittently rotate at equal angles, so that the driving gear 431 and the driven gear 421 drive the rotary center post 42 to intermittently rotate at equal angles, and the rotary disk 44 is driven to intermittently rotate at equal angles; meanwhile, the rotation speed of the rotary driving motor 43 is adjustable, so that the time for rotating the rotary disk 44 for one circle can be adjusted, and the heat preservation time of the hot coil spring on the rotary disk 44 can be adjusted.

Referring to fig. 1, 4-6, six circumferentially uniformly distributed seating grooves 440 are formed on the rotating disk 44; the seating groove 440 is located between the external heating assembly and the internal heating assembly; the seating groove 440 is opened up and down; the seating groove 440 is composed of a pair of coaxially disposed circular holes distributed up and down and the diameter of the circular hole of the upper side is greater than that of the circular hole of the lower side; a spring seat 45 is arranged in the seat groove 440 from top to bottom; the spring seat 45 includes an upper cylindrical seat 451 and a lower cylindrical seat 452; the diameter of the upper seating part 451 is the same as that of the upper portion of the seating groove 440; a cylindrical groove-shaped spring mounting groove 4510 into which the lower end of the heat supply coil spring is vertically inserted is formed on the upper end surface of the upper mounting part 451; the diameter of the upper setting part 451 is larger than the diameter of the inlet and outlet hole 210; the diameter of the lower seating part 452 is the same as that of the lower part of the seating groove 440; a cylindrical groove-shaped lifting connection slot 4520 is formed on the lower end surface of the lower mounting portion 452.

Referring to fig. 1 and 6, the elevation device 50 includes an elevation support base 52 and an elevation driving mechanism for driving the elevation support base 52 to vertically ascend and descend; the lifting support seat 52 is positioned right below the feeding and discharging holes 210; the lifting support base 52 includes a circular plate-shaped lifting bottom plate 521 and a cylindrical lifting connection plug 522 coaxially formed on an upper end surface of the lifting bottom plate 521 to be fitted with the lifting connection socket 4520; the diameter of the lifting bottom plate 521 is larger than the diameter of the lifting connection plug 522; the diameter of the lifting bottom plate 521 is smaller than that of the circular hole at the lower side of the seating groove 440; the lifting drive mechanism comprises a lifting drive cylinder 51 fixed on the lower end surface of the furnace body 21; the cylinder body of the lifting driving cylinder 51 is positioned in the driving avoiding groove 100; the elevation support base 52 is coaxially fixed to the upper end of the piston rod of the elevation drive cylinder 51.

When the hot coil spring is discharged, the lifting driving cylinder 51 drives the lifting supporting seat 52, in the process, the lifting connecting plug 522 is inserted into the lifting connecting slot 4520 at the bottom of the spring placing seat 45, and the lifting supporting seat 52 vertically passes through the placing groove 440 to drive the spring placing seat 45 and the hot coil spring thereon to move upwards, so that the hot coil spring vertically passes through the feeding and discharging hole 210, and finally the spring placing seat 45 blocks the feeding and discharging hole 210, and heat exchange can be reduced when the hot coil spring is fed and discharged.

Referring to fig. 1 and 5, six circular plate-shaped reflecting plates 441 having uniformly distributed circumferences are inlaid on the lower end surface of the rotating disk 44; the reflecting plates 441 are in one-to-one correspondence with the seating grooves 440; the corresponding reflecting plate 441 and the seating groove 440 are located in the same radial direction; a photoelectric switch 60 is arranged on the lower side wall of the furnace body 21; the photoelectric switch 60 is opposite to the reflecting plate 441 engaged with the seating groove 440 located right under the feed/discharge hole 210; the photoelectric switch 60 is used for controlling the lifting driving cylinder 51; in operation, when the reflecting plate 441 faces the photoelectric switch 60, the photoelectric switch 60 controls the elevation driving cylinder 51 to be started.

Referring to fig. 1 to 3, in order to further reduce heat loss, an enclosure device is further provided on the upper end surface of the furnace body 21; the enclosure means comprises a symmetrically disposed enclosure mechanism 70; the enclosing mechanism 70 includes an enclosing seat 71 provided on an upper end surface of the furnace body 21 to be horizontally moved, and a horizontal driving assembly for driving the enclosing seat 71; a pair of surrounding seats 71 are formed with semicircular column shaped surrounding grooves on the end surfaces close to each other, and the lower ends of the surrounding grooves are opened; the horizontal drive assembly includes a horizontal drive cylinder 72; the surrounding seat 71 is fixed to the piston rod of the horizontal driving cylinder 72 on the corresponding side; a pair of horizontal driving cylinders 72 drive a pair of surrounding seats 71 to approach or separate from each other; when the pair of surrounding seats 71 are close to each other, the pair of surrounding grooves form a complete cylindrical groove; the cylindrical groove is disposed coaxially with the feed/discharge hole 210 and has a diameter larger than that of the feed/discharge hole 210.

Referring to fig. 1 to 3, in order to increase sealability when a pair of surrounding seats 71 are abutted against each other, a sealing insert frame 711 of a U shape with a downward opening is formed on an end surface of one surrounding seat 71 facing the other surrounding seat 71; the other end surface surrounding the corresponding side of the seat 71 is formed with a sealing slot 710 in a U shape with a downward opening for the sealing rack 711 to be horizontally inserted.

The working principle of the heat preservation furnace of the hot coil spring is as follows:

when the thermal insulation work is carried out, the opening and closing seat 32 seals the feeding and discharging hole 210, the lower end of the hot coil spring which is not drawn is positioned in the spring accommodating groove 4510 of the spring accommodating seat 45 and intermittently rotates along with the same angle of the rotary disc 44, when the hot coil spring rotates along with the rotary disc 44 for one circle, the opening and closing moving cylinder 31 drives the opening and closing seat 32 to horizontally move so as to open the feeding and discharging hole 210, the photoelectric switch 60 is opposite to the reflecting plate 441 corresponding to the hot coil spring, thus the photoelectric switch 60 controls the lifting driving cylinder 51 to start, the lifting driving cylinder 51 drives the lifting supporting seat 52 to lift, in the process, the lifting connecting plug 522 of the lifting supporting seat 52 is inserted into the lifting connecting plug 4520 of the spring accommodating seat 45, and drives the spring accommodating seat 45 and the hot coil spring thereon to lift together until the spring accommodating seat 45 seals the feeding and discharging hole 210; when the lifting support base 52 ascends, the pair of horizontal driving cylinders 72 drive the pair of surrounding bases 71 to approach each other until the two mutually abut against each other to cover the feeding and discharging holes 210, so that heat transfer between the outside air and the inside of the holding furnace is reduced; then, the pair of horizontal driving cylinders 72 drive the pair of surrounding seats 71 to be away from each other, so that an operator can take out the heat-releasing coil spring, and the feeding and discharging holes 210 are blocked by the spring placing seats 45 at the moment, so that no matter how slow the operator operates, the heat loss in the holding furnace can be avoided.

The above embodiments are not intended to limit the scope of the present invention, so: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.

Claims (10)

1. The utility model provides a heat preservation stove of spring is rolled up to heat which characterized in that: comprises a heat preservation furnace body (20), an opening and closing device (30), a rotating device (40) and a lifting device (50) which are arranged on the ground (10); the heat preservation furnace body (20) comprises a cylindrical furnace body (21) with a hollow inside; a heating mechanism is arranged in the furnace body (21); a round hole-shaped feeding hole (210) vertically penetrating through the heat supply coil spring with a vertical opening is formed in the upper side wall of the furnace body (21); the opening and closing device (30) comprises an opening and closing seat (32) horizontally arranged on the upper end surface of the furnace body (21) and an opening and closing moving mechanism for driving the opening and closing seat (32); the opening and closing seat (32) is used for closing the feeding and discharging hole (210); the rotary device (40) comprises a disc-shaped rotary disc (44) which is coaxially and rotatably connected to the inner bottom of the furnace body (21), and a rotary driving mechanism for driving the rotary disc (44) to intermittently rotate at equal angles; a plurality of circumferentially uniformly distributed mounting grooves (440) are formed on the rotating disc (44); the feeding and discharging holes (210) are coaxially arranged with one of the mounting grooves (440); a spring mounting seat (45) is arranged in the mounting groove (440) from top to bottom; the lifting device (50) is used for driving the spring placement seat (45) positioned right below the feeding hole (210) to vertically lift; when the spring mounting seat (45) is at the uppermost end, the spring mounting seat (45) blocks the feeding and discharging hole (210).

2. The holding furnace for a hot coil spring according to claim 1, wherein: also comprises an enclosing device; the enclosure includes a pair of symmetrically disposed enclosure mechanisms (70); the surrounding mechanism (70) comprises a surrounding seat (71) horizontally arranged on the upper end surface of the furnace body (21) in a moving way and a horizontal driving assembly for driving the surrounding seat (71); a pair of said horizontal drive assemblies driving a pair of said surrounding seats (71) away from or towards each other; a pair of surrounding seats (71) are formed with semicircular column groove-shaped surrounding grooves on the end surfaces close to each other, and the lower ends of the surrounding grooves are opened; when a pair of the surrounding seats (71) are close to each other, a pair of the surrounding grooves form a complete cylindrical groove; the cylindrical groove is arranged coaxially with the inlet and outlet hole (210) and has a diameter larger than that of the inlet and outlet hole (210).

3. A heat retaining oven for a coil spring as claimed in claim 2 wherein: the end face of one surrounding seat (71) facing the other surrounding seat (71) is provided with a sealing insertion frame (711) in a U shape with a downward opening; the end surface of the corresponding side of the surrounding seat (71) is provided with a U-shaped sealing slot (710) with a downward opening for the sealing insertion frame (711) to be horizontally inserted.

4. The holding furnace for a hot coil spring according to claim 1, wherein: the opening and closing seat (32) comprises an outer opening and closing seat (321) and an inner opening and closing plate (323); a vertical moving groove for vertically moving the inner opening and closing plate (323) is formed on the lower end surface of the outer opening and closing seat (321); a plurality of uniformly distributed compression springs (322) are arranged between the upper end surface of the inner opening and closing plate (323) and the upper side wall of the vertical moving groove; the upper end of the pressure spring (322) is fixed on the upper side wall of the vertical moving groove, and the lower end of the pressure spring is propped against the upper end surface of the inner opening and closing plate (323); the inner opening and closing plate (323) has a size larger than that of the inlet and outlet hole (210).

5. The holding furnace for a hot coil spring according to claim 1, wherein: the heating mechanism comprises a plurality of vertically arranged external heating rods (23) fixed between the upper side wall and the lower side wall of the furnace body (21); all the external heating rods (23) are positioned outside the rotating disc (44) and are uniformly distributed circumferentially with the rotation center axis of the rotating disc (44) as an axis.

6. The heat preservation stove of hot coil spring according to claim 5, wherein: the heating mechanism also comprises a plurality of vertically arranged inner heating rods (24) fixed on the upper side wall of the furnace body (21); all the inner heating rods (24) are positioned right above the rotating disc (44) and are uniformly distributed around the rotating center shaft of the rotating disc (44); the spring mounting seat (45) is positioned between the external heating rod (23) and the internal heating rod (24).

7. The holding furnace for a hot coil spring according to claim 1, wherein: the upper and lower openings of the placement groove (440); the arrangement groove (440) consists of a pair of coaxially arranged round holes which are distributed up and down, and the diameter of the round hole on the upper side is larger than that of the round hole on the lower side; the spring mounting seat (45) comprises a cylindrical upper mounting part (451) at the upper side and a cylindrical lower mounting part (452) at the lower side; the diameter of the upper mounting part (451) is the same as the diameter of the upper part of the mounting groove (440); the diameter of the lower seating part (452) is the same as the diameter of the lower part of the seating groove (440); a lifting connecting slot (4520) is formed on the lower end surface of the lower mounting part (452); the lifting device (50) comprises a lifting supporting seat (52) and a lifting driving mechanism for driving the lifting supporting seat (52) to vertically lift; the lifting support seat (52) is positioned right below the feeding hole (210); the size of the lifting support seat (52) is smaller than that of the lower circular hole of the placement groove (440); the upper end of the lifting supporting seat (52) is provided with a lifting connecting plug block (522) matched with the lifting connecting slot (4520).

8. The heat preservation stove of hot coil spring according to claim 7, wherein: a cylindrical groove-shaped spring accommodating groove (4510) for vertically inserting the heat supply coil spring is formed in the upper end face of the upper accommodating part (451).

9. The holding furnace for a hot coil spring according to claim 1, wherein: the rotating speed of the rotating disc (44) is adjustable.

10. The holding furnace for a hot coil spring according to claim 1, wherein: a plurality of reflecting plates (441) with evenly distributed circumferences are embedded on the lower end surface of the rotating disc (44); the reflecting plates (441) are in one-to-one correspondence with the mounting grooves (440); a photoelectric switch (60) is arranged on the lower side wall of the furnace body (21); the photoelectric switch (60) is opposite to the reflecting plate (441) matched with the placement groove (440) positioned right below the feeding and discharging hole (210); the photoelectric switch (60) is used for controlling the lifting device (50).