Horizontal tempering furnace for bolt fasteners

Abstract

The invention relates to the technical field of wind power bolt production, in particular to a horizontal tempering furnace for bolt fasteners. Comprising a furnace body, the side, close to an outlet, of the furnace body is rotationally connected with a sealing door, the furnace body is fixedly connected with an inner barrel and heat radiation rods evenly distributed in the circumferential direction, the inner barrel is located on the inner sides of the heat radiation rods evenly distributed in the circumferential direction, the furnace body is rotationally connected with a mounting plate, and the mounting plate is fixedly connected with an electric sliding rail; the electric sliding blocks on the electric sliding rails are fixedly connected with a sliding frame, the sliding frame is slidably connected with a heat insulation glass plate, an elastic piece is installed between the sliding frame and the heat insulation glass plate, and the heat insulation glass plate is used for blocking an outlet of the furnace body. The outlet of the furnace body is blocked through the heat insulation glass plate in the bolt assembling and disassembling process, so that the outward leakage amount of high-temperature gas in the furnace body during bolt assembling and disassembling is reduced, and meanwhile, the probability that external water vapor enters the furnace body in the gas exchange process of the inner side and the outer side of the furnace body is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of wind power bolt production, in particular to a horizontal tempering furnace for bolt fasteners. Background Art

[0002] A horizontal tempering furnace is a commonly used steel structure tempering device, which is often used in the manufacturing process of large bolts used in the wind power field. The wind power field has extremely high quality requirements for large bolts. Therefore, the temperature required for the bolt tempering process is high. The temperature inside the furnace during the tempering process is usually about 500°C. When using the horizontal tempering furnace to temper bolts, after each batch of bolt tempering operations is completed, when the furnace door of the tempering furnace is opened for loading and unloading operations, the high temperature inside the furnace will quickly overflow outward and exchange heat with the outside air. The existing tempering furnace can only rely on workers to use simple tools such as long rods to load and unload workpieces, and take out the grouped bolts one by one, and then place the bolts into the tempering furnace in the same way. As a result, the existing tempering furnace takes a long time for loading and unloading, the temperature loss speed inside the furnace during the loading and unloading interval is fast, and the total heat loss is large, resulting in waste of energy. Moreover, water vapor in the air is extremely likely to rush into the tempering furnace in large quantities during the heat exchange process with the furnace. If the water vapor content inside the furnace is large during the tempering process, an additional process of vacuum pumping to remove water vapor is required, otherwise it will lead to the acceleration of oxidation on the surface of the bolts during the tempering process and the possibility of forming an oxide layer with a thickness exceeding the standard. Summary of the Invention

[0003] In order to overcome the disadvantages of the existing tempering furnace, such as long loading and unloading time, large heat loss, and easy entry of a large amount of water vapor into the furnace, the invention provides a horizontal tempering furnace for bolt fasteners.

[0004] The technical solution is as follows: A horizontal tempering furnace for bolt fasteners includes a furnace body. A sealing door is rotatably connected to one side of the furnace body close to the outlet. The furnace body is fixedly connected with an inner cylinder and circumferentially uniformly distributed heat radiation rods. The inner cylinder is located inside the circumferentially uniformly distributed heat radiation rods. The furnace body is rotatably connected with a mounting plate. The mounting plate is fixedly connected with an electric slide rail. An electric slider on the electric slide rail is fixedly connected with a sliding frame. The sliding frame is slidably connected with a heat-insulating glass plate, and an elastic member is installed between the two. The heat-insulating glass plate is used to block the outlet of the furnace body. The heat-insulating glass plate is provided with a first through hole and a second through hole. The sliding frame is fixedly connected with a support rod. The support rod passes through the first through hole. An placing frame is placed on the support rod. The placing frame is used to hold bolts. Fixed piles distributed in a rectangle are fixedly connected inside the furnace body. The fixed piles are used to support the placing frame. A regulating mechanism for adjusting the placing height of the placing frame is arranged on the sliding frame.

[0005] As an improvement to the above solution, the adjusting mechanism includes a first electric push rod, the first electric push rod is fixedly connected to the sliding frame, the telescopic end of the first electric push rod is fixedly connected to a second electric push rod, the telescopic end of the second electric push rod is fixedly connected to a pushing claw, the pushing claw passes through the first through hole, and the pushing claw is used to hold the placement frame and move it. The fixed pile is fixedly connected with supporting blocks distributed at longitudinal intervals, and the supporting blocks are used to support the placement frame. The support rod is provided with a containing part and an inclined part.

[0006] As an improvement to the above solution, the supporting block is fixedly connected with a blocking protrusion, and the blocking protrusion is used to limit the placement frame.

[0007] As an improvement to the above solution, the heat-insulating glass plate is slidably connected with a first shielding member located at the first through hole, and the heat-insulating glass plate is slidably connected with a second shielding member located at the second through hole. The first shielding member and the second shielding member are used to reduce the flow area of the first through hole and the second through hole.

[0008] As an improvement to the above solution, the support rod is provided with a supporting part, and when the supporting part is in contact with the inner cylinder and the mounting plate, it provides a supporting force for the support rod.

[0009] As an improvement to the above solution, on one side of the furnace body near the outlet, symmetrically distributed side fixing plates are fixedly connected, and the symmetrically distributed side fixing plates are jointly fixedly connected with an upper fixing plate. The upper fixing plate is rotatably connected with a blocking curtain, and the blocking curtain is composed of longitudinally distributed shielding plates. Adjacent two shielding plates are rotatably connected, and the uppermost shielding plate is rotatably connected with the upper fixing plate. The heat-insulating glass plate is fixedly connected with a pushing rod, and the pushing rod is used to contact the placement frame. The pushing rod, the placement frame and the support rod move the shielding plate by squeezing the shielding plate.

[0010] As an improvement to the above solution, there are gaps at the rotational connection of adjacent two shielding plates and at the rotational connection of the uppermost shielding plate and the upper fixing plate. There are spaces between adjacent two shielding plates, between the shielding plate and the side fixing plate, and between the upper fixing plate and the adjacent shielding plate, for reserving the space required for the thermal expansion of the shielding plate.

[0011] As an improvement to the above solution, a gas circulation system is arranged in the furnace body. The furnace body is provided with a gas supply head and an air extraction head. Both the gas supply head and the air extraction head are communicated with the gas circulation system, and the gas supply head is used to inject protective gas into the furnace body.

[0012] As an improvement to the above solution, an air suction head is fixedly connected in the furnace body, and the air suction head is communicated with the gas circulation system. The air suction head is located between the blocking curtain and the sealing door.

[0013] As an improvement of the above solution, the air supply head is located on the side of the furnace body close to the barrier curtain.

[0014] Compared with the existing device, the present invention has at least the following advantages: During the process of loading and unloading bolts, the heat insulation glass plate of the present invention seals the outlet of the furnace body, thereby reducing the amount of high-temperature gas leaking out of the furnace body when loading and unloading bolts. At the same time, when reducing the gas exchange between the inside and outside of the furnace body, the probability of external water vapor entering the furnace body is reduced. While saving resources and improving the resource utilization rate of the device, the probability of water vapor affecting the tempering process of bolts is reduced, and the yield rate of bolts produced by the present device is improved.

[0015] On the premise of sealing the outlet of the furnace body, the present invention places the bolts in a suitable position in the furnace body through the support rod and the pushing claw, and proposes a convenient way to place the bolts in the furnace body, shortening the single opening time of the sealing door when loading and unloading bolts, which not only increases the utilization rate of heat resources, but also improves the continuity of the process.

[0016] By adding a barrier curtain, the present invention separates the sealing door and the inner cylinder with the barrier curtain, and then separates the condensed water mist on the sealing door from the inner cylinder. The water vapor between the barrier curtain and the sealing door is sucked out by the suction head, thereby reducing the probability of water vapor entering the inner cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a three-dimensional structural schematic diagram of the sealing door, inner cylinder and heat radiation rod of the present invention; Figure 3 is a cross-sectional view of the furnace body of the present invention; Figure 4 is a three-dimensional structural schematic diagram of the sliding frame and heat insulation glass plate of the present invention; Figure 5 is a three-dimensional structural schematic diagram of the furnace body and the heat insulation glass plate when they are attached; Figure 6 is a cross-sectional view of the heat insulation glass plate of the present invention; Figure 7 is a three-dimensional structural schematic diagram of the fixed pile and the supporting block of the present invention; Figure 8 is a three-dimensional structural schematic diagram of the containing part, inclined part and supporting part of the present invention; Figure 9 is a three-dimensional structural schematic diagram of the upper fixing plate and the shielding plate of the present invention; Figure 10 is the present invention Figure 9 The enlarged view at A in.

[0018] Names of the reference numerals in the figure: 1, furnace body; 2, sealing door; 3, inner cylinder; 4, thermal radiation rod; 5, mounting plate; 6, electric slide rail; 7, sliding frame; 8, heat insulation glass plate; 81, first through hole; 82, second through hole; 83, push rod; 10, support rod; 101, containing part; 102, inclined part; 103, supporting part; 11, placing frame; 12, fixed pile; 13, supporting block; 131, blocking protrusion; 14, first electric push rod; 15, second electric push rod; 16, push claw; 17, first shielding member; 18, second shielding member; 19, side fixing plate; 20, upper fixing plate; 21, shielding plate; 22, suction head; 23, air supply head; 231, air extraction head. Detailed implementation manners

[0019] The above solution will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are used to illustrate the present application but not to limit the scope of the present application. The implementation conditions adopted in the embodiments can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0020] Embodiment 1: This embodiment provides a horizontal tempering furnace for bolt fasteners, which, compared with the existing device, has the functions of increasing the material loading and unloading speed and reducing the temperature loss speed in the tempering furnace when loading and unloading materials.

[0021] Referring to Figures 1 - 6 , it includes a furnace body 1. The outlet of the furnace body 1 is located at its front side. The left part of the front side of the furnace body 1 is rotatably connected with a sealing door 2. The furnace body 1 is fixedly connected with an inner cylinder 3 and circumferentially uniformly distributed thermal radiation rods 4. The circumferentially uniformly distributed thermal radiation rods 4 are located between the inner cylinder 3 and the furnace body 1 (refer to Figure 2 ). The inner cylinder 3 is used to make the temperature radiated by the thermal radiation rods 4 into the furnace more uniform. The right part of the front side of the furnace body 1 is rotatably connected with a mounting plate 5. The mounting plate 5 is fixedly connected with an electric slide rail 6. An electric slider on the electric slide rail 6 is fixedly connected with a sliding frame 7. The sliding frame 7 is slidably connected with a heat insulation glass plate 8 through a support rod, and an elastic member is installed between the two (refer to Figure 4 ). This elastic member is a tension spring. The heat insulation glass plate 8 is used to cover the outlet of the furnace body 1 (refer to Figure 5 ), reducing the speed of heat overflowing outward. A first through hole 81 is provided at the lower part of the heat insulation glass plate 8 (refer to Figure 6 ). A second through hole 82 is provided at the upper part of the heat insulation glass plate 8. A support rod 10 is fixedly connected to the lower part of the sliding frame 7. The support rod 10 passes through the first through hole 81. An placing frame 11 is placed on the support rod 10. The placing frame 11 is a fixed steel structure frame. The placing frame 11 is used to hold a group of bolts. Four fixed piles 12 distributed in a rectangle are fixedly connected in the furnace body 1. The fixed piles 12 are used to support the placing frame 11. An adjusting mechanism for adjusting the placing height of the placing frame 11 is provided on the sliding frame 7.

[0022] The above setting can be achieved by the staff placing the bolts on the placement rack 11 in advance, and then placing the placement rack 11 on the four fixed piles 12 in the furnace body 1 through the support rod 10, so as to achieve the purpose of quickly placing the bolts in the furnace body 1, and during the placement process, the outlet of the furnace body 1 is blocked by the insulating glass plate 8. Even if the bolts slide or shake during the placement process, the staff extends a long rod into the furnace body 1 through the second through hole 82 and uses the long rod to adjust the position of the bolt. In the process of adjusting the bolt position, the insulating glass plate 8 blocks the outlet of the furnace body 1, reducing the speed of heat transfer to the outside.

[0023] Reference Figures 4 - 8 The adjustment mechanism includes a first electric push rod 14, which is fixed to the upper part of the sliding frame 7. The first electric push rod 14 is used to drive the components thereon to move in the front and rear directions. The telescopic end of the first electric push rod 14 is fixed to the second electric push rod 15, and the telescopic end of the second electric push rod 15 is fixed to the pushing claw 16. The second electric push rod 15 is used to drive the pushing claw 16 to move up and down. The pushing claw 16 passes through the first through hole 81 (refer to Figure 5 ), the push claw 16 moves vertically to clamp the mounting frame 11 in the horizontal direction, and drives the mounting frame 11 to move by limiting the horizontal position of the mounting frame 11. The fixed pile 12 is fixed with the supporting blocks 13 distributed at longitudinal intervals (refer to Figure 6 and Figure 7 ), the supporting block 13 is used to support the placement rack 11, and the support rod 10 is provided with a holding portion 101 and an inclined portion 102. The horizontal height of the holding portion 101 is higher than the horizontal height of the top of the fixed pile 12. The holding portion 101 is used to horizontally support the placement rack 11, and the inclined portion 102 is used to cooperate with the pushing claw 16 to adjust the height of the placement rack 11 together.

[0024] The above arrangement can achieve that when the support rod 10 and the pushing claw 16 push the placing rack 11 into the furnace, the placing rack 11 moves together with the support rod 10 and the pushing claw 16. When the support rod 10 stops moving, the placing rack 11 moves along with the support rod 10 and the pushing claw 16. Figure 5 and Figure 8 Taking the perspective of as an example, the pushing claw 16 drives the placement rack 11 to move to the left, and the placement rack 11 moves from the containing portion 101 to the inclined portion 102. At this time, the placement rack 11 slides downward along the inclined portion 102 during the movement, and the telescopic end of the second electric push rod 15 drives the pushing claw 16 to move downward with the placement rack 11, so that the left and right ends of the placement rack 11 maintain a horizontal state, thereby adjusting the height of the placement rack 11. After the adjustment is completed, the support rod 10 and the pushing claw 16 move into the furnace together, and the placement rack 11 is placed on the supporting block 13 of the four fixed piles 12.

[0025] Reference Figure 6 and Figure 7, a blocking protrusion 131 is fixedly connected to the front side of the supporting block 13. The blocking protrusion 131 is used to limit the placement frame 11 to prevent the placement frame 11 from sliding relative to the supporting block 13 after being placed on the four supporting blocks 13.

[0026] Refer to Figure 6 , a first shielding member 17 is slidably connected to the heat-insulating glass plate 8 at the first through hole 81. The first shielding member 17 is provided with a hole for the pushing claw 16 to pass through. The pushing claw 16 pushes the first shielding member 17 to move up and down together, reducing the flow area of the first through hole 81, thereby reducing the area of the heat exchange channel between the hot air inside the furnace and the outside gas. A second shielding member 18 is slidably connected to the heat-insulating glass plate 8 at the second through hole 82. The second shielding member 18 is used to reduce the flow area of the second through hole 82. At the same time, the straight rod that penetrates into the furnace body 1 through the second through hole 82 can drive the second shielding member 18 to slide in the second through hole 82, increasing the moving range of the straight rod that penetrates into the furnace body 1.

[0027] Refer to Figure 8 , a supporting portion 103 is provided on the side of the support rod 10 away from the adjacent heat-insulating glass plate 8. When the supporting portion 103 is outside the furnace body 1, the supporting portion 103 abuts against the mounting plate 5, thereby supporting the support rod 10 and the placement frame 11. When the supporting portion 103 penetrates into the furnace body 1, the supporting portion 103 abuts against the inner cylinder 3, and is used to support the support rod 10 and the placement frame 11.

[0028] The working principle of the above settings is as follows: When the staff uses this device to temper the bolts, the staff places the grouped bolts on the external placement frame 11 in sequence. Then the staff opens the sealing door 2 and moves the mounting plate 5 from Figure 1The state starts to rotate until the insulating glass plate 8 is aligned with the furnace body 1, the mounting plate 5 stops rotating, the sliding frame 7, the insulating glass plate 8, the support rod 10 and the placement frame 11 are all located at the front side of the furnace body 1, the staff starts the electric slide rail 6, and the electric slider on the electric slide rail 6 drives the sliding frame 7, the insulating glass plate 8, the support rod 10, the placement frame 11, the first electric push rod 14, the second electric push rod 15 and the pushing claw 16 to move backward together, the support rod 10, the placement frame 11 and the pushing claw 16 are gradually inserted into the inner tube 3, and the support part 103 gradually moves from the state of abutting with the mounting plate 5 to the state of abutting with the inner tube 3, The rack 11 is supported. When the rack 11 is completely inserted into the furnace body 1 and the insulating glass plate 8 is in contact with the furnace body 1, the insulating glass plate 8 blocks the outlet of the furnace body 1 (if the bolt tempering process has been completed once and the gas temperature in the furnace is high, the insulating glass plate 8 blocks the outlet of the furnace body 1 to reduce the probability of hot gas escaping outward). The rack 11 is close to the two fixed piles 12 on the rear side. At this time, the staff turns off the electric slide 6, and the sliding rack 7 and the components thereon stop moving. The staff prepares to adjust the height of the rack 11 and the bolts thereon to ensure that the bolts are located in the center area of the inner tube 3 during the tempering process, thereby improving the uniformity of the heating of the bolts.

[0029] When the staff adjusts the height of the placement rack 11, the staff first controls the telescopic end of the first electric push rod 14 to extend backward, and the telescopic end of the first electric push rod 14 drives the second electric push rod 15, the pushing claw 16 and the placement rack 11 to extend backward together. When the rear side of the placement rack 11 moves from the containing portion 101 to the inclined portion 102, the staff controls the telescopic end of the first electric push rod 14 to extend backward and at the same time controls the telescopic end of the second electric push rod 15 to extend downward, and the telescopic end of the second electric push rod 15 drives the pushing claw 16 to move downward, and the placement rack 11 slides backward and downward along the inclined portion 102. In the process of pushing the pushing claw 16 pushing the placement rack 11 to slide backward, it moves downward with the placement rack 11 to keep the placement rack 11 in a horizontal state. When the staff adjusts the position of the placement rack 11 so that its upper bolt is located in the middle of the furnace body 1, the staff closes the Close the first electric push rod 14 and the second electric push rod 15, and then the staff continues to start the electric slide rail 6, so that the sliding frame 7 drives the placement frame 11 to continue to move backward until the placement frame 11 moves into the supporting block 13 on the four fixed piles 12, and the staff closes the electric slide rail 6. At this time, if the bolt is displaced due to vibration or other reasons during the movement, the staff inserts a straight rod into the furnace body 1 through the first through hole 81, and uses the straight rod to adjust the position of the bolt, thereby keeping the position of the bolt in a relatively uniform state at all times. If the gas temperature in the furnace is high, during the above adjustment process, because the insulating glass plate 8 always blocks the outlet of the furnace body 1, the hot air in the furnace body 1 can only flow out through the first through hole 81 and the second through hole 82. Therefore, the heat loss rate is slow, and most of the water vapor is blocked on the outside of the insulating glass plate 8 and is difficult to enter the furnace body 1.

[0030] After the placement rack 11 is moved onto the supporting block 13 on the four fixed piles 12, the staff controls the telescopic end of the second electric push rod 15 to drive the adjacent parts to continue to move downward, so that the pushing claw 16 moves downward relative to the placement rack 11, and the pushing claw 16 releases the limit on the placement rack 11. Then the staff starts the electric slide rail 6, so that the sliding rack 7 drives the adjacent parts to move forward. After the support rod 10 is completely moved out of the furnace body 1, the staff pushes the mounting plate 5 to rotate and reset, closes the sealing door 2, and starts the heat radiation rod 4 to evenly temper the bolts.

[0031] After the tempering process is completed, the staff closes the thermal radiation rod 4, and through the existing pressure relief structure, the normal pressure is restored inside the furnace body 1. Then, the sealing door 2 is opened, and the placement rack 11 and the bolts thereon are taken out of the furnace body 1 according to the operation steps opposite to the above work process. Subsequently, the staff closes the sealing door 2 and reinstalls the bolts into the furnace body 1 according to the above process again. Since the furnace body 1 is in communication with the outside for a short time during the loading and unloading process, the temperature loss of the furnace body 1 to the outside is small. This not only reduces the rate of temperature loss to the outside, but also intercepts the surrounding water vapor through the heat insulation glass plate 8, reducing the probability of water vapor entering the furnace body 1.

[0032] Embodiment 2: Compared with the horizontal tempering furnace for bolt fasteners proposed in Embodiment 1, it also has the function of reducing the entry of water vapor condensed due to high-temperature heat exchange on the sealing door 2 into the furnace body 1.

[0033] Refer to Figure 5 , a gas circulation system is provided inside the furnace body 1 (which is an existing device, usually composed of components such as an air extraction pump, a gas pipeline, a filtering device, and a pressure relief valve). The furnace body 1 is provided with a gas supply head 23 and an air extraction head 231. Both the gas supply head 23 and the air extraction head 231 are connected to the gas circulation system. The gas supply head 23 is used to inject protective gas into the furnace body 1.

[0034] The above settings can achieve that the gas circulation system extracts the air inside the furnace body 1 through the air extraction head 231 and injects protective gas through the gas supply head 23, so that the protective gas fills the space inside the furnace body 1. Through the gas circulation flow, the temperature inside the furnace body 1 becomes more uniform, and the content of water vapor in the furnace body 1 is reduced through the existing filtering device. During the feeding and discharging inside the furnace body 1, protective gas can be injected through the gas supply head 23 at the outlet of the furnace body 1, so that the protective gas drives the water vapor at the outlet of the furnace body 1 to flow outwards, thereby reducing the probability of water vapor entering the furnace body 1. And this method is combined with the function of the above heat insulation glass plate 8 (that is, jetting gas only when the heat insulation glass plate 8 blocks the furnace body 1), which can reduce the temperature transfer between the inside and outside, reduce the probability of water vapor entering the inner cylinder 3, and save the usage amount of protective gas at the same time.

[0035] Refer to Figures 2 - 4 , Figure 9 and Figure 10 , two side fixing plates 19 symmetrically distributed left and right are fixedly connected to the front side of the furnace body 1. The two side fixing plates 19 and the furnace body 1 are jointly fixedly connected with an upper fixing plate 20. The upper fixing plate 20 is rotatably connected with a barrier curtain (refer to Figure 9As shown in the figure, the barrier curtain is composed of four baffle plates 21 distributed longitudinally. Two adjacent baffle plates 21 are rotatably connected. The uppermost baffle plate 21 is rotatably connected to the upper fixing plate 20. The heat-insulating glass plate 8 is fixedly connected with a push rod 83. The push rod 83 is used to contact the placement rack 11. The push rod 83, the placement rack 11 and the support rod 10 push the baffle plate 21 to lift it towards the furnace body 1 by squeezing the baffle plate 21 (refer to Figure 4 ).

[0036] The above settings can achieve that when the sealing door 2 is opened and the support rod 10 has not entered the furnace body 1, the barrier curtain seals the front side of the furnace body 1, reducing the possibility of hot air in the furnace body 1 escaping outward and water vapor outside the furnace body 1 penetrating inward. The barrier curtain and the heat-insulating glass plate 8 cross-seal the furnace body 1, further shortening the time when the furnace body 1 is directly connected to the outside.

[0037] Refer to Figure 9 and Figure 10 There are gaps at the rotational connection of two adjacent baffle plates 21 and at the rotational connection of the uppermost baffle plate 21 and the upper fixing plate 20. There are voids between two adjacent baffle plates 21, between the upper fixing plate 20 and the adjacent baffle plate 21, and between the baffle plate 21 and the side fixing plate 19, which are used to reserve the voids required for the thermal expansion of the baffle plate 21, ensuring that even if the baffle plate 21 undergoes thermal expansion, the two baffle plates 21 will not be unable to rotate relative to each other due to thermal expansion.

[0038] Refer to Figure 5 and Figure 6 A suction head 22 is fixedly connected inside the furnace body 1. The suction head 22 is connected to the gas circulation system. The suction head 22 is located between the barrier curtain and the sealing door 2 and is used to extract the air between the barrier curtain and the sealing door 2 after the sealing door 2 is closed, thereby reducing the possibility of water vapor adhering to the sealing door 2 entering the other side of the barrier curtain inside the furnace body 1 and contacting the bolt.

[0039] Refer to Figure 5 The air supply head 23 is located on the side of the furnace body 1 close to the barrier curtain. When the barrier curtain is lifted, the protective gas ejected by the air supply head 23 is guided outward.

[0040] The above settings can achieve the following: when the staff member opens the sealed door 2 and prepares to take out the placement rack 11, as the electric slider on the electric slide rail 6 drives the sliding rack 7, the heat-insulating glass plate 8, and the support rod 10 to move backward together, when the push rod 83 on the support rod 10 and the heat-insulating glass plate 8 contacts the adjacent baffle 21, the adjacent baffle 21 is lifted upward around its rotation connection with the upper baffle 21, so that the barrier curtain does not obstruct the entry of the support rod 10 and the push claw 16 into the furnace body 1. At this time, the staff member controls the gas circulation system to inflate the gas supply head 23, so that the protective gas pushes the air at the outlet of the furnace body 1 outward, reducing the probability of water vapor in the air entering the furnace body 1. After the support rod 10 and the push claw 16 enter the furnace body 1, they clamp the placement rack 11 according to the above work process. When the placement rack 11 is moved to the placement part 101 on the support rod 10, the placement rack 11 contacts the push rod 83. Subsequently, during the process of the placement rack 11 moving out of the furnace body 1, the barrier curtain is always located above the placement rack 11 and the push rod 83. When the placement rack 11 moves out of the furnace body 1, the lower side of the barrier curtain loses its block and swings downward to a vertical state, continuing to block the outlet of the furnace body 1.

[0041] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A horizontal tempering furnace for bolt fasteners, comprising a furnace body (1), a sealing door (2) is rotatably connected to one side of the furnace body (1) close to the outlet, the furnace body (1) is fixedly connected with an inner cylinder (3) and heat radiation rods (4) evenly distributed circumferentially, the inner cylinder (3) is located inside the heat radiation rods (4) evenly distributed circumferentially, and is characterized in that, The furnace body (1) is rotatably connected to a mounting plate (5), the mounting plate (5) is fixed to an electric slide rail (6), the electric slider on the electric slide rail (6) is fixed to a sliding frame (7), the sliding frame (7) is slidably connected to an insulating glass plate (8), and an elastic member is installed between the two, the insulating glass plate (8) is used to block the outlet of the furnace body (1), the insulating glass plate (8) is provided with a first through hole (81) and a second through hole (82), the sliding frame (7) is fixed to a support rod (10), the support rod (10) passes through the first through hole (81), a placement frame (11) is placed on the support rod (10), the placement frame (11) is used to hold bolts, rectangular fixed piles (12) are fixed in the furnace body (1), the fixed piles (12) are used to support the placement frame (11), and the sliding frame (7) is provided with an adjustment mechanism for adjusting the placement height of the placement frame (11).

2. The horizontal tempering furnace for bolt fasteners according to claim 1, characterized in that, The adjustment mechanism includes a first electric push rod (14), the first electric push rod (14) is fixed to the sliding frame (7), the telescopic end of the first electric push rod (14) is fixed to the second electric push rod (15), the telescopic end of the second electric push rod (15) is fixed to a pushing claw (16), the pushing claw (16) passes through the first through hole (81), the pushing claw (16) is used to clamp the placement frame (11) to move, the fixed pile (12) is fixed to supporting blocks (13) distributed at longitudinal intervals, the supporting blocks (13) are used to support the placement frame (11), and the support rod (10) is provided with a containing portion (101) and an inclined portion (102).

3. A horizontal tempering furnace for bolt fasteners according to claim 2, characterized in that, The supporting block (13) is fixedly connected with a blocking protrusion (131), and the blocking protrusion (131) is used to limit the placement frame (11).

4. A horizontal tempering furnace for bolt fasteners according to claim 2, characterized in that, The insulating glass plate (8) is slidably connected to a first shielding member (17) located at the first through hole (81), and the insulating glass plate (8) is slidably connected to a second shielding member (18) located at the second through hole (82), wherein the first shielding member (17) and the second shielding member (18) are used to reduce the flow area of the first through hole (81) and the second through hole (82).

5. The horizontal tempering furnace for bolt fasteners according to claim 2, characterized in that, The support rod (10) is provided with a support portion (103), and the support portion (103) is used to provide a supporting force to the support rod (10) when in contact with the inner cylinder (3) and the mounting plate (5).

6. A horizontal tempering furnace for bolt fasteners according to claim 5, characterized in that, On one side of the furnace body (1) near the outlet, there are symmetrically distributed side fixing plates (19) fixedly connected. The symmetrically distributed side fixing plates (19) are jointly fixedly connected with an upper fixing plate (20). The upper fixing plate (20) is rotatably connected with a blocking curtain. The blocking curtain is composed of longitudinally distributed baffle plates (21). Adjacent two baffle plates (21) are rotatably connected. The uppermost baffle plate (21) is rotatably connected with the upper fixing plate (20). The heat-insulating glass plate (8) is fixedly connected with a push rod (83). The push rod (83) is used to contact the placement rack (11). The push rod (83), the placement rack (11) and the support rod (10) move the baffle plate (21) by squeezing the baffle plate (21).

7. A horizontal tempering furnace for bolt fasteners according to claim 6, characterized in that, There are gaps at the rotational connection of adjacent two baffle plates (21) and at the rotational connection of the uppermost baffle plate (21) and the upper fixing plate (20). There are voids between adjacent two baffle plates (21), between the baffle plate (21) and the side fixing plate (19), and between the upper fixing plate (20) and the adjacent baffle plate (21) for reserving the void required for the thermal expansion of the baffle plate (21).

8. A horizontal tempering furnace for bolt fasteners according to claim 6, characterized in that, A gas circulation system is arranged in the furnace body (1). The furnace body (1) is provided with a gas supply head (23) and an air extraction head (231). Both the gas supply head (23) and the air extraction head (231) are communicated with the gas circulation system. The gas supply head (23) is used to inject protective gas into the furnace body (1).

9. The horizontal tempering furnace for bolt fasteners according to claim 8, characterized in that, An air suction head (22) is fixedly connected in the furnace body (1). The air suction head (22) is communicated with the gas circulation system. The air suction head (22) is located between the blocking curtain and the sealing door (2).

10. A horizontal tempering furnace for bolt fasteners according to claim 9, characterized in that, The gas supply head (23) is located on one side of the furnace body (1) close to the blocking curtain.

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