Speed-limiting cooling furnace for annealing treatment of alloy forgings

Abstract

The invention belongs to the technical field of cooling furnaces, and particularly relates to a speed-limiting cooling furnace for annealing treatment of alloy forgings, the speed-limiting cooling furnace comprises a furnace body assembly, the furnace body assembly comprises a shell, a lower base and an upper base, a feeding port is formed in the front end of the shell, the lower base and the upper base are arranged at the upper end and the lower end of the shell, and a lower cavity communicated with the shell is formed in the lower base; an air supply assembly; and an air suction assembly. According to the technical scheme, the lower cavity is formed in the lower portion of the shell and communicated with the shell, and cooling air is conveyed to the middle of the shell through the air supply pipe and conveyed to the bottom of the shell through the air supply branch pipe and the lower cavity; the upper cavity is arranged on the upper portion of the shell and communicated with the shell, hot air in the middle of the shell is pumped out through the air suction pipe, hot air on the top of the shell is pumped out through the upper cavity and the air suction branch pipes, and through the arrangement mode, cooling air used for cooling has two movement paths in the left-right direction and the up-down direction and can make full contact with the forge piece, and the forge piece cooling rate is increased; the problem that in the prior art, the production requirement that the annealing cooling rate of the Ti55531 alloy forge piece is about 150-180 DEG C / h cannot be met is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of cooling furnaces, and in particular relates to a speed-limited cooling furnace for annealing of alloy forgings. Background Art

[0002] During the processing of forgings, annealing and cooling treatment are required. Its main function is to control the cooling of hot forgings to achieve the required mechanical properties and organizational structure. As an important equipment in the forging processing, the forging cooling furnace has the functions of controlling the cooling rate, eliminating internal stress, adjusting the organizational structure, and improving the surface quality of forgings.

[0003] However, the existing forging cooling furnace has a cooling rate of about 55±10℃ / h during production and use, which cannot meet the annealing cooling requirements for alloy forgings with high cooling rates. For example, the annealing test cooling rate of Ti55531 alloy forgings requires about 100-180℃ / h.

[0004] In view of the above problems, a speed-limited cooling furnace for annealing of alloy forgings is designed. Summary of the invention

[0005] The present invention aims at solving the problems in the prior art and proposes the following technical solutions: A speed-limited cooling furnace for annealing alloy forgings, including A furnace body assembly, the furnace body assembly comprising a shell with a feed port at the front end, a lower base and an upper base arranged at the upper and lower ends of the shell, the lower base is provided with a lower cavity penetrating the shell inside, and the upper base is provided with an upper cavity penetrating the shell inside; An air supply component, the air supply component includes a plurality of air supply fans, an air supply pipe is provided through the air outlet end of the air supply fan, the air outlet end of the air supply pipe is connected to the interior of the shell, an air supply branch pipe is provided through the middle of the air supply pipe, and the air outlet end of the air supply branch pipe is connected to the interior of the lower cavity; A suction component, the suction component includes a plurality of exhaust fans, an air suction pipe is provided through the air inlet end of the exhaust fan, the air inlet end of the air suction pipe is connected to the interior of the shell, the air suction pipe and the air supply pipe are arranged opposite to each other, an air suction branch pipe is provided through the middle of the air suction pipe, and the air inlet end of the air suction branch pipe is connected to the interior of the upper cavity; The cooling air sent by the blower is sent to the middle of the shell through the air supply pipe and to the bottom of the shell through the air supply branch pipe. The exhaust fan extracts the hot air in the middle of the shell through the suction pipe and the hot air at the top of the shell through the suction branch pipe.

[0006] As a preferred embodiment of the above technical solution, the furnace body assembly further includes a support base arranged on the lower base, and the air supply fan and the exhaust fan are both installed on the support base.

[0007] As a preferred embodiment of the above technical solution, the furnace body assembly further includes a gate covering the feed port of the shell, and a hydraulic rod is provided on the lower base, and an output end of the hydraulic rod is connected to the gate.

[0008] As a preferred embodiment of the above technical solution, a diverter plate is provided inside the air supply pipe, a diverter hole is provided on the diverter plate, and the diverter plate is located between the shell and the air supply branch pipe; The upper end of the diverter plate is inclined toward the blower.

[0009] As a preferred embodiment of the above technical solution, an air blocking plate is provided inside the air suction pipe, an air outlet hole is provided on the air blocking plate, and the air blocking plate is located between the shell and the air suction branch pipe.

[0010] As a preferred embodiment of the above technical solution, the air inlet end of the blower and the air outlet end of the exhaust fan are both provided with a valve body assembly; The valve body assembly includes a tube body connected to the air inlet end of the blower and the air outlet end of the exhaust fan, the inner wall of the tube body radially extends to form a step, a plurality of slots are provided on the step, and arc plates are slidably matched in the slots, and one end of the plurality of arc plates extends out of the tube body and is connected to the same side plate; The arc-shaped plate reciprocates in a horizontal direction relative to the tube body, and a tuyere gap is formed between two adjacent arc-shaped plates and between the tube body and the side plate.

[0011] As a preferred embodiment of the above technical solution, one side of the arc-shaped plate of the side plate is connected with a rubber ring, and the rubber ring is located outside the arc-shaped plate; An electric push rod is arranged on one side of the side plate away from the arc-shaped plate, and the electric push rod is installed on the support seat.

[0012] As a preferred embodiment of the above technical solution, the arc-shaped plate matches the trough body, and the widths of the plurality of arc-shaped plates are different.

[0013] As a preferred embodiment of the above technical solution, a support assembly for placing the forging is provided inside the shell, the lower cavity extends inwardly to form an edge, and the support assembly is placed on the edge; The support assembly includes a center column, the upper and lower ends of which are connected to fixed support plates, the ends of which are connected to mounting plates, the same set of movable support plates are arranged on two mounting plates at the same horizontal height, and the ends of two mounting plates located on the same side in the up and down directions are connected to the same side column.

[0014] As a preferred embodiment of the above technical solution, the center column includes a cylinder body 1, a rod body 1 movably inserted into the cylinder body 1, a screw is threadedly matched in a threaded hole opened on the side wall of the cylinder body 1, the movable end of the cylinder body 1 is connected to a fixed support plate below, and the movable end of the rod body 1 is connected to an upper mounting plate; The side column comprises two relatively distributed cylinder bodies 2, one of the cylinder bodies 2 is movably plugged with a rod body 2, and the rod body 2 is fixedly connected to the other cylinder body 2.

[0015] As a preferred embodiment of the above technical solution, the mounting plate is movably matched with the movable support plate, a plurality of slot bodies 2 are provided on the mounting plate, and a protrusion matching the slot body 2 is provided on the movable support plate, and the protrusion is inserted into the interior of the slot body 2 from above.

[0016] The beneficial effects of the present invention are: In the technical solution of the speed-limited cooling furnace for annealing of alloy forgings, the lower cavity is arranged at the lower part of the shell and is connected therewith, and the cooling air is sent to the middle part of the shell through the air supply pipe, and is sent to the bottom of the shell through the air supply branch pipe and the lower cavity; the upper cavity is arranged at the upper part of the shell and is connected therewith, and the hot air in the middle part of the shell is extracted through the suction pipe, and the hot air at the top of the shell is extracted through the upper cavity and the suction branch pipe. This arrangement allows the cooling air used for cooling to have two movement paths in the left and right directions and the up and down directions, which can fully contact the forgings, thereby improving the cooling rate of the forgings and meeting the problem that the prior art cannot meet a higher cooling rate.

[0017] The speed-limited cooling furnace for annealing of alloy forgings in this technical solution is suitable for annealing of Ti55531 alloy forgings, and has a high cooling rate, which solves the problem that the existing technology cannot achieve the production demand of annealing cooling rate of Ti55531 alloy forgings of about 150-180°C / h. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It shows the structural schematic diagram of the speed-limited cooling furnace used for annealing of alloy forgings in Example 1; Figure 2 The diagram shows the internal structure of the speed-limited cooling furnace used for annealing of alloy forgings in Example 1; Figure 3 It is shown that Figure 1 , Figure 2 Schematic diagram of the structure of the central air supply duct; Figure 4 It is shown that Figure 1 , Figure 2 Schematic diagram of the structure of the middle suction pipe; Figure 5 It is shown that Figure 1 , Figure 2 The structural diagram of the middle valve body assembly; Figure 6 It is shown that Figure 5 A schematic cross-sectional view of the joint between the middle step and the curved plate; Figure 7 It is shown that Figure 2 A schematic diagram of the structure of the middle support assembly; Figure 8 It is shown that Figure 2 A schematic diagram of the three-dimensional structure of the middle support assembly; Fig. 9 It is shown that Figure 7 , Figure 8 Schematic diagram of the structure of the middle and side columns; Fig.10 It is shown that Figure 7 , Figure 8 Schematic diagram of the coordination status between the middle mounting plate and the movable support plate.

[0019] Reference numerals: furnace assembly 10; lower base 11; lower cavity 111; edge 112; shell 12; upper base 13; upper cavity 131; support seat 14; gate 15; hydraulic rod 16; Air supply assembly 20; air supply fan 21; air supply pipe 22; air supply branch pipe 221; splitter plate 222; Air suction component 30; exhaust fan 31; air suction pipe 32; air suction branch pipe 321; air blocking plate 322; Valve body assembly 40; pipe body 41; step 42; tank body 1 421; side plate 43; arc plate 44; rubber ring 45; electric push rod 46; Support assembly 50; middle column 51; cylinder 1 511; rod 1 512; screw 513; fixed support plate 52; mounting plate 53; slot 2 531; side column 54; cylinder 2 541; rod 2 542; movable support plate 55; protrusion 551. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0021] Example 1 like Figure 1 , Figure 2 As shown, a speed-limited cooling furnace for annealing of alloy forgings comprises a furnace body assembly 10, the furnace body assembly 10 comprises a shell 12 with a feed port at the front end, a lower base 11 and an upper base 13 arranged at the upper and lower ends of the shell 12, a lower cavity 111 penetrating with the shell 12 is arranged inside the lower base 11, and an upper cavity 131 penetrating with the shell 12 is arranged inside the upper base 13; The air supply assembly 20 includes a plurality of air supply fans 21, an air supply pipe 22 is provided through the air outlet end of the air supply fan 21, the air outlet end of the air supply pipe 22 is connected to the interior of the housing 12, an air supply branch pipe 221 is provided through the middle of the air supply pipe 22, and the air outlet end of the air supply branch pipe 221 is connected to the interior of the lower cavity 111; The air suction component 30 includes a plurality of exhaust fans 31, an air suction pipe 32 is provided through the air inlet end of the exhaust fan 31, the air inlet end of the air suction pipe 32 is connected to the interior of the shell 12, the air suction pipe 32 is arranged opposite to the air supply pipe 22, an air suction branch pipe 321 is provided through the middle of the air suction pipe 32, and the air inlet end of the air suction branch pipe 321 is connected to the interior of the upper cavity 131; The cooling air delivered by the blower 21 is delivered to the middle of the shell 12 through the air supply pipe 22 and to the bottom of the shell 12 through the air supply branch pipe 221. The exhaust fan 31 draws out the hot air in the middle of the shell 12 through the suction pipe 32 and draws out the hot air at the top of the shell 12 through the suction branch pipe 321.

[0022] In the technical scheme of the speed-limited cooling furnace for annealing of alloy forgings, cooling air is sent into the interior of the shell 12 through the air supply assembly 20 to cool the forgings, and the cooling air that absorbs heat and heats up and moves upward is extracted from the interior of the shell 12 through the air suction assembly 30; The lower cavity 111 is arranged at the lower part of the shell 12 and is connected thereto. The cooling air is sent to the middle part of the shell 12 through the air supply pipe 22, and is sent to the bottom of the shell 12 through the air supply branch pipe 221 and the lower cavity 111; the upper cavity 131 is arranged at the upper part of the shell 12 and is connected thereto. The hot air in the middle part of the shell 12 is extracted through the suction pipe 32, and the hot air at the top of the shell 12 is extracted through the upper cavity 131 and the suction branch pipe 321. This arrangement enables the cooling air used for cooling to have two movement paths in the left and right directions and in the up and down directions, so that it can fully contact the forgings, thereby improving the cooling rate of the forgings and meeting the problem that the prior art cannot meet a higher cooling rate.

[0023] The speed-limited cooling furnace for annealing of alloy forgings in this technical solution is suitable for annealing of Ti55531 alloy forgings, and has a high cooling rate, which solves the problem that the existing technology cannot achieve the production demand of annealing cooling rate of Ti55531 alloy forgings of about 150-180°C / h.

[0024] In order to achieve stable installation of the blower 21 and the exhaust fan 31, Figure 1 , Figure 2 As shown, the furnace body assembly 10 further includes a support base 14 disposed on the lower base 11 , and the blower 21 and the exhaust fan 31 are both installed on the support base 14 .

[0025] like Figure 1As shown, the furnace assembly 10 further includes a gate 15 covering the feed port of the shell 12 , and a hydraulic rod 16 is disposed on the lower base 11 , and the output end of the hydraulic rod 16 is connected to the gate 15 .

[0026] The gate 15 is provided to cover the feed port of the shell 12 so that the shell 12 can form a closed furnace body, thereby preventing the cooling air from overflowing from the feed port, and avoiding the problem of not being able to achieve the optimal cooling effect and not being able to control the cooling rate.

[0027] The air supply pipe 22 is used as the main air supply pipe. Without intervention, most of the air sent by the air blower 21 will enter the interior of the shell 12 through the air supply pipe 22. In order to make the cooling air sent in evenly distributed in the interior of the shell 12, Figure 3 As shown, a diverter plate 222 is provided inside the air supply pipe 22, and a diverter hole is provided on the diverter plate 222. The diverter plate 222 is located between the housing 12 and the air supply branch pipe 221; The upper end of the splitter plate 222 is inclined toward the direction of the blower 21 , which is beneficial to the change of the cooling air path, so that the cooling air can more easily enter the interior of the air supply branch pipe 221 .

[0028] A portion of the cooling air delivered by the blower 21 is delivered to the middle part of the shell 12 through the diverter hole through the air supply pipe 22, and a portion of the cooling air is intercepted by the diverter plate 222 and enters the interior of the air supply branch pipe 221, and is delivered to the bottom of the shell 12 through the air supply branch pipe 221. The arrangement of the diverter plate 222 makes the air volume at the air inlet position and the corresponding position controllable, thereby improving the uniformity of the distribution of the delivered cooling air in the interior of the shell 12.

[0029] The air suction pipe 32 is used as the main air duct. Without intervention, most of the air in the middle of the shell 12 will be extracted by the exhaust fan 31 through the air suction pipe 32. In order to extract as much air as possible after absorbing heat inside the shell 12, Figure 4 As shown, a wind blocking plate 322 is provided inside the air suction pipe 32 , and an air outlet is provided on the wind blocking plate 322 . The wind blocking plate 322 is located between the shell 12 and the air suction branch pipe 321 .

[0030] When exhausting air inside the shell 12, the air in the middle of the shell 12 is intercepted by the air blocking plate 322, and part of the air is extracted by the exhaust fan 31 through the air outlet and the air suction pipe 32; the hot air at the top of the shell 12 is extracted by the exhaust fan 31 through the air suction branch pipe 321. The setting of the air blocking plate 322 can extract as much hot air from the top as possible while meeting the setting requirements of the upward and downward and left and right directions of the gas inside the shell 12, so that the incoming cooling wind and rain can contact the forgings, thereby improving the cooling efficiency.

[0031] Furthermore, in order to be able to control the air volume supplied and the air volume exhausted, that is, to be able to control the cooling rate, such as Figure 1 , Figure 2, Figure 5 , Figure 6 As shown, the air inlet end of the blower 21 and the air outlet end of the exhaust fan 31 are both provided with a valve body assembly 40; The valve body assembly 40 includes a tube body 41 which is connected to the air inlet end of the blower 21 and the air outlet end of the exhaust fan 31. The inner wall of the tube body 41 extends radially to form a step 42. The step 42 is provided with a plurality of grooves 421. In this embodiment, two grooves 421 are provided. The grooves 421 are slidably fitted with arc plates 44. One end of the plurality of arc plates 44 extends out of the tube body 41 and is connected to the same side plate 43. The arc-shaped plate 44 reciprocates in the horizontal direction relative to the tube body 41 , and a tuyere gap is formed between two adjacent arc-shaped plates 44 and between the tube body 41 and the side plate 43 .

[0032] In the valve body assembly 40 of the present technical solution, the size of the air outlet gap is controlled by controlling the horizontal movement of the arc plate 44, and the size of the air inlet and outlet are further controlled. The specific control method is as follows: Figure 5 , the arc plate 44 moves to the left, the air outlet gap decreases, the air inlet and air outlet volumes decrease, the arc plate 44 moves to the right, the air outlet gap increases, the air inlet and air outlet volumes increase.

[0033] To ensure the sealing performance of the valve body assembly 40 when closing the air vent gap, Figure 5 , Figure 6 As shown, a rubber ring 45 is connected to one side of the arc plate 44 of the side plate 43, and the rubber ring 45 is located outside the arc plate 44; when the air outlet gap is closed, the rubber ring 45 contacts the tube body 41, and the rubber ring 45 fills the gap between the side plate 43 and the tube body 41 to ensure the sealing of the valve body assembly 40.

[0034] In order to realize the setting requirement of the arc plate 44 reciprocating in the horizontal direction relative to the tube body 41, as shown in FIG. Figure 5 , Figure 6 As shown, an electric push rod 46 is provided on one side of the side plate 43 away from the arc plate 44 , and the electric push rod 46 is installed on the support seat 14 .

[0035] The extension or shortening of the electric push rod 46 can achieve the effect of driving the arc plate 44 to reciprocate in the horizontal direction through the side plate 43. Specifically, when the overall length of the electric push rod 46 is extended, the arc plate 44 moves toward the tube body 41; when the overall length of the electric push rod 46 is shortened, the arc plate 44 moves away from the tube body 41.

[0036] like Figure 5 , Figure 6As shown, the arc plate 44 matches the groove body 421, and the widths of the multiple arc plates 44 are different. In this embodiment, the different widths of the two arc plates 44 make the relative position of the arc plate 44 unique when inserted into the groove body 421, which has a fool-proof technical effect during assembly.

[0037] In order to further improve the cooling rate, Figure 2 , Figure 7 , Figure 8 As shown, a support assembly 50 for placing the forging is disposed inside the housing 12, and the lower cavity 111 extends inwardly to form an edge portion 112, and the support assembly 50 is placed on the edge portion 112; The support assembly 50 includes a center column 51, and the upper and lower ends of the center column 51 are connected to fixed support plates 52, and the ends of the fixed support plates 52 are connected to mounting plates 53. The same set of movable support plates 55 are arranged on two mounting plates 53 located at the same horizontal height, and the ends of the two mounting plates 53 located on the same side in the up and down directions are connected to the same side column 54.

[0038] The support assembly 50 is configured with two layers distributed up and down. When assembled into the interior of the shell 12, they are at a certain distance from the top and the bottom, and the support surface adopts a rod-type structure of a fixed support plate 52, a mounting plate 53, and a movable support plate 55 to ensure the permeability of the assembly. The setting of the support assembly 50 separates and places the forgings to be cooled inside the shell 12, meets the permeability of the air duct at the bottom of the shell 12, increases the contact area between the forgings and the cooling air, and improves the cooling efficiency of the forgings.

[0039] In order to increase the application range of the limited-rate cooling furnace for annealing of the alloy forgings, when the size of the forgings to be cooled changes, a high cooling rate can still be maintained, such as Figure 6 , Figure 7 , Figure 8 , Fig. 9 As shown, the middle column 51 includes a cylinder body 511, a rod body 512 movably inserted in the cylinder body 511, a screw 513 is threadedly engaged in the threaded hole opened on the side wall of the cylinder body 511, the movable end of the cylinder body 511 is connected to the lower fixed support plate 52, and the movable end of the rod body 512 is connected to the upper mounting plate 53; the side column 54 includes two relatively distributed cylinder bodies 541, a rod body 542 is movably inserted in one cylinder body 541, and the rod body 542 is fixedly connected to the other cylinder body 541.

[0040] When adjusting the height of the support assembly 50, the rod body 512 is extended or retracted into the cylinder body 511, and the relative positions of the cylinder body 511 and the rod body 512 are fixed by the screw 513. At this time, the overall length of the side column 54 is extended or shortened synchronously.

[0041] In the support assembly 50, by changing the overall length of the middle column 51 and the distance between the upper and lower layers, when the size of the forging to be cooled increases, the spacing between the upper and lower layers is increased, thereby maintaining a certain distance between the forgings and achieving the effect of maintaining the cooling rate of the forgings.

[0042] In order to further increase the applicable scope of the limited speed cooling furnace for annealing of alloy forgings, the front and rear distances of the support assembly 50 can be adjusted according to the length of the forgings, so as to achieve the effect of supporting and cooling forgings of different lengths, such as Fig.10 As shown, the mounting plate 53 is movably matched with the movable support plate 55, and a plurality of slot bodies 531 are provided on the mounting plate 53. The plurality of slot bodies 531 are equidistantly and linearly distributed on the mounting plate 53. A protrusion 551 matching the slot body 531 is provided on the movable support plate 55, and the protrusion 551 is inserted into the interior of the slot body 531 from above.

[0043] The mounting plate 53 and the movable support plate 55 are assembled by inserting the protrusion 551 on the movable support plate 55 into the groove 531 on the mounting plate 53. The distance between the movable support plate 55 and the fixed support plate 52 is adjusted according to the length of different forgings, thereby achieving stable support for forgings of different lengths.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A speed-limited cooling furnace for annealing of alloy forgings, characterized in that: include A furnace body assembly (10), the furnace body assembly (10) comprising a shell (12) with a feed port at the front end, a lower base (11) and an upper base (13) arranged at the upper and lower ends of the shell (12), the lower base (11) having a lower cavity (111) in communication with the shell (12) arranged therein, and the upper base (13) having an upper cavity (131) in communication with the shell (12) arranged therein; An air supply component (20), the air supply component (20) comprising a plurality of air supply fans (21), an air supply pipe (22) being provided through the air outlet end of the air supply fan (21), the air outlet end of the air supply pipe (22) being connected to the interior of the housing (12), an air supply branch pipe (221) being provided through the middle of the air supply pipe (22), the air outlet end of the air supply branch pipe (221) being connected to the interior of the lower cavity (111); An air suction component (30), the air suction component (30) comprising a plurality of exhaust fans (31), an air suction pipe (32) being provided through the air inlet end of the exhaust fan (31), the air inlet end of the air suction pipe (32) being connected to the interior of the housing (12), the air suction pipe (32) being arranged opposite to the air supply pipe (22), an air suction branch pipe (321) being provided through the middle of the air suction pipe (32), the air inlet end of the air suction branch pipe (321) being connected to the interior of the upper cavity (131); The cooling air delivered by the air supply fan (21) is delivered to the middle of the shell (12) through the air supply pipe (22) and to the bottom of the shell (12) through the air supply branch pipe (221). The exhaust fan (31) extracts the hot air in the middle of the shell (12) through the air suction pipe (32) and extracts the hot air at the top of the shell (12) through the air suction branch pipe (321).

2. The speed-limited cooling furnace for annealing of alloy forgings according to claim 1, characterized in that: The furnace body assembly (10) further comprises a support base (14) arranged on the lower base (11), and the air supply fan (21) and the air exhaust fan (31) are both mounted on the support base (14).

3. The speed-limited cooling furnace for annealing of alloy forgings according to claim 1, characterized in that: The furnace body assembly (10) further comprises a gate (15) covering the feed port of the shell (12); a hydraulic rod (16) is provided on the lower base (11); and an output end of the hydraulic rod (16) is connected to the gate (15).

4. The speed-limited cooling furnace for annealing of alloy forgings according to claim 1, characterized in that: A flow dividing plate (222) is provided inside the air supply pipe (22), and flow dividing holes are provided on the flow dividing plate (222), and the flow dividing plate (222) is located between the shell (12) and the air supply branch pipe (221); The upper end of the diverter plate (222) is inclined in the direction of the air blower (21).

5. The speed-limited cooling furnace for annealing of alloy forgings according to claim 1, characterized in that: An air blocking plate (322) is provided inside the air suction pipe (32), and an air outlet hole is provided on the air blocking plate (322). The air blocking plate (322) is located between the housing (12) and the air suction branch pipe (321).

6. The speed-limited cooling furnace for annealing of alloy forgings according to claim 2, characterized in that: The air inlet end of the air supply fan (21) and the air outlet end of the air exhaust fan (31) are both provided with a valve body assembly (40); The valve body assembly (40) comprises a tube body (41) which is connected to the air inlet end of the blower (21) and the air outlet end of the exhaust fan (31); the inner wall of the tube body (41) extends radially to form a step (42); a plurality of grooves (421) are provided on the step (42); arc plates (44) are slidably fitted in the grooves (421); one end of the plurality of arc plates (44) extends out of the tube body (41) and is connected to the same side plate (43); The arc-shaped plate (44) reciprocates in a horizontal direction relative to the tube body (41), and a tuyere gap is formed between two adjacent arc-shaped plates (44) and between the tube body (41) and the side plate (43).

7. The speed-limited cooling furnace for annealing of alloy forgings according to claim 6, characterized in that: The side plate (43) on which the arc-shaped plate (44) is provided is connected to a rubber ring (45), and the rubber ring (45) is located outside the arc-shaped plate (44); An electric push rod (46) is provided on a side of the side plate (43) away from the arc-shaped plate (44), and the electric push rod (46) is mounted on the support seat (14).

8. The speed-limited cooling furnace for annealing of alloy forgings according to claim 6, characterized in that: The arc-shaped plate (44) matches the groove body 1 (421), and the widths of the plurality of arc-shaped plates (44) are different.

9. The speed-limited cooling furnace for annealing of alloy forgings according to claim 1, characterized in that: A support assembly (50) for placing a forging is disposed inside the housing (12); the lower cavity (111) extends inwardly to form an edge portion (112), and the support assembly (50) is placed on the edge portion (112); The support assembly (50) comprises a center column (51), the upper and lower ends of the center column (51) are connected to fixed support plates (52), the ends of the fixed support plates (52) are connected to mounting plates (53), the same set of movable support plates (55) are arranged on two mounting plates (53) at the same horizontal height, and the ends of the two mounting plates (53) located on the same side in the up-down direction are connected to the same side column (54).

10. The speed-limited cooling furnace for annealing of alloy forgings according to claim 9, characterized in that: The center column (51) comprises a cylinder body (511) and a rod body (512) movably inserted into the cylinder body (511); a screw (513) is threadedly engaged in a threaded hole provided on a side wall of the cylinder body (511); the movable end of the cylinder body (511) is connected to a fixed support plate (52) at the bottom, and the movable end of the rod body (512) is connected to a mounting plate (53) at the top; The side column (54) comprises two relatively distributed cylinder bodies (541), one of the cylinder bodies (541) having a second rod body (542) movably inserted therein, and the second rod body (542) is fixedly connected to the other cylinder body (541); The mounting plate (53) is movably matched with the movable support plate (55); a plurality of second groove bodies (531) are provided on the mounting plate (53); a convex block (551) matching the second groove body (531) is provided on the movable support plate (55); the convex block (551) is inserted into the interior of the second groove body (531) from above.

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