CN103757192A - Residual heat utilizing pusher furnace - Google Patents

Abstract

The invention discloses a push rod type furnace with waste heat utilization, which comprises a furnace body, a feed door and a discharge door are arranged at the front end of the furnace body, a translation device outside the furnace is arranged in front of the furnace body, and a preheating cooling chamber is arranged in the front part of the furnace body , two parallel material passages are set in the middle, and a translational passage in the furnace is provided at the rear. The preheating and cooling chamber and the translational passage in the furnace are respectively connected to the front and rear ends of the two material passages. Conveying rollers are arranged in the preheating and cooling chamber and the material passage A furnace translation mechanism is provided in the furnace translation channel, a front pusher and a discharge mechanism are arranged at the front end of the translation device outside the furnace, a rear pusher is arranged at the rear of the furnace body, and the push rod of the pusher extends into the furnace body; the present invention The beneficial effect is: effectively solve the technical problems of the existing technology that the furnace body occupies a large area, the material frame is difficult to return, the energy utilization rate is low, and the operating environment is bad. According to the experimental calculation, the present invention saves about 35% of the energy compared with the prior art. , and the present invention has simple structure and convenient operation.

Description

A Pusher Furnace with Waste Heat Utilization

technical field

The invention relates to a push rod type furnace with waste heat utilization, which belongs to the field of heat treatment technology.

Background technique

At present, most domestic push rod furnaces adopt a straight structure, that is, the input and output of the equipment are at both ends of the furnace body; the cooling chamber for the workpiece is generally installed at the output end to cool the workpiece, which is convenient for manual unloading. If it is necessary to send the material frame back to the feeding end, a set of material frame return mechanism is also required. Such a structure has many defects; for example: firstly, the equipment occupies a large area, and a separate material frame recovery mechanism needs to be installed next to the equipment; secondly, the temperature of the workpiece is relatively high (generally around 550°C), and the fan is used to cool it. A large amount of energy is taken away with the exhaust gas, the energy utilization rate is low, and the waste is serious; third, because the temperature of the workpiece is high, the ambient temperature at the discharge end is very high; resulting in a bad workshop environment, which is very unfavorable to the health of the operators.

Contents of the invention

The purpose of the present invention is to provide a push rod furnace with waste heat utilization, which solves the technical problems in the prior art that the furnace body occupies a large area, it is difficult to return the material frame, the energy utilization rate is low, and the operating environment is harsh.

In order to solve the problems referred to above, the technical scheme that the present invention takes is:

A pusher type furnace with waste heat utilization, comprising a furnace body, the front end of the furnace body is provided with a feed door and a discharge door, the front of the furnace body is provided with an external translation device, and the front part of the furnace body is provided with a preheating and cooling chamber. The middle part is provided with two parallel material passages along the direction of the furnace body length, and the rear part is provided with a translational passage in the furnace. Conveyor rollers are set in the cooling chamber and the material channel, and the translation mechanism in the furnace is set in the translation channel in the furnace. And the discharge mechanism, the rear pusher is set at the rear of the furnace body, the push rod of the pusher extends into the furnace body and is higher than the conveying roller, the front pusher is set facing the feeding door, and the outlet The material mechanism, the discharge door and the rear pusher are set on the same horizontal line;

The inner walls of the two material passages are provided with a first air passage, the bottom of the first air passage communicates with the bottom of the material passage, and a first heating element is arranged in the first air passage, and the tops of the two material passages are both A first circulating fan is set, the blades of the first circulating fan are arranged in the first air channel, and the first air channel where the first circulating fan blades are located communicates with the top of the material channel;

The top of the translation channel in the furnace is provided with a second circulation fan, the inner wall of the translation channel in the furnace is provided with a second air channel and a second heating element is provided in the second air channel, and the blades of the second circulation fan are arranged in the second air channel. The bottom of the second air channel communicates with the bottom of the translation channel in the furnace, and the second air channel where the second circulation fan blade is located communicates with the top of the translation channel in the furnace;

The side of the top feed door of the preheating cooling chamber is provided with a third circulating fan, the inner wall of the preheating cooling chamber is provided with a third air passage, and the blades of the third circulating fan are arranged in the third air passage. The third air duct mentioned above is divided into two layers connected up and down at the blade of the third fan. One end of the third air duct on the upper layer extends along the inner wall of the preheating and cooling chamber to the side where the discharge door is located. The preheating and cooling chambers communicate with each other, and the other end is closed. One end of the third air duct on the lower floor extends downward along the inner wall of the preheating and cooling chamber, and its bottom and side parts communicate with the preheating and cooling chambers, and the other end is closed.

In the present invention, two parallel material passages are arranged, the rear parts of the material passages are connected, and a translation mechanism in the furnace is provided, so that the materials can enter the furnace from the feed port for heat treatment, and the direction is changed through the translation mechanism in the furnace. The heat treatment continues in the material channel, and the two material channels are arranged in parallel so that the entire push rod furnace with waste heat utilization is U-shaped. The length of the push rod furnace with waste heat utilization is greatly shortened, and the floor area of the push rod furnace with waste heat utilization is reduced. The front of the push rod furnace with waste heat utilization is equipped with an external translation device to make the discharge After the material in the material frame coming out of the outlet is taken out, the material frame can be transported to the discharge port more conveniently, realizing the return and reuse of the material frame; in the present invention, the material channel and the bottom of the air channel in the translational channel in the furnace are respectively connected with the material channel It communicates with the bottom of the translation channel in the furnace, and the blades of the circulating fan are arranged in the air channel, so that the air flow in the air channel flows downward along the air channel through the material channel and the bottom of the translation channel in the furnace, then upward through the material and enters the air channel again. Realize the circulation of air. Since the heating element is installed in the air duct, the temperature of the air flow in the air duct is relatively high. After the heat treatment of the material, the temperature of the air flow is relatively reduced, and then the temperature rises after passing through the heating element in the air duct. In this way, the heat treatment of the material is carried out in such a cycle, because The temperature of the airflow passing through the material is always high, so the effect of heat treatment on the material is ideal; because the temperature of the material just entering the furnace body is low, and the temperature of the material discharged is high, the structure of the air duct in the preheating and cooling chamber makes the air flow in it The flow direction can only be from the discharge gate side to the feed gate side, and then to the discharge gate side, so that the energy of the heat-treated workpiece on the discharge gate side is brought to the feed gate side. The preheating of the materials that have just entered the furnace body not only realizes the cooling of the high-temperature workpieces that have been heat-treated, but also realizes the preheating of the cold workpieces that have just entered the furnace body, and realizes the full use of energy in the heat treatment. After the heat-treated workpieces are cooled The temperature is lowered, so the temperature of the workpiece out of the furnace is relatively not too hot, so the temperature at the discharge port is relatively not too high, the ambient temperature of the entire workshop is relatively low, and the operator's comfort level is relatively improved when operating.

As a further improvement of the present invention, an intermediate valve is provided at the connection between the preheating cooling chamber and the material channel on the side where the discharge door is located. The middle valve is opened when the rear pusher pushes the material frame to move forward, and the push rod of the rear pusher is closed backwards, which further reduces the loss of energy through the discharge door and saves energy resources.

As a further improvement of the present invention, the furnace translation mechanism is two parallel chains driven by the first driving motor arranged outside the furnace, and the top ends of the chains are flush with the top ends of the conveying rollers. The chain is used to transport the material frame from the conveying roller on one side to the other end. The transmission continuity is good, and the chain is made of metal, which has strong high temperature resistance and is suitable for use in the furnace.

As a further improvement of the present invention, the translation device outside the furnace includes a bracket and two chains arranged in parallel driven by the second drive motor, and two chains are arranged on the top of the bracket corresponding to the feeding door and the discharging door. A row of balls, the tops of the chain and the balls are flush with the tops of the conveying rollers.

To sum up, the beneficial effects of the present invention are: effectively solve the technical problems of large furnace body area, difficulty in returning the material frame, low energy utilization rate and harsh operating environment in the prior art. The prior art saves energy by about 35%, and the invention has simple structure and convenient operation.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a cross-sectional view along line A-A of Fig. 1 .

Fig. 3 is a B-B sectional view of Fig. 1 .

Fig. 4 is a C-C sectional view of Fig. 1 .

Detailed ways

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

The push rod furnace with waste heat utilization as shown in Figures 1 to 4 includes a furnace body 5, the front end of the furnace body 5 is provided with a feed door 15 and a discharge door 14, and the front of the furnace body 5 is provided with a translation outside the furnace In the device 10, a preheating cooling chamber 4 is arranged in the front part of the furnace body 5, two parallel material passages are arranged in the middle along the direction of the length of the furnace body 5, and a translational passage in the furnace is arranged in the tail part. The preheating cooling chamber 4 and the furnace The translation channel is respectively connected to the front end and the rear end of the two material channels. The conveying rollers are arranged in the preheating cooling chamber 4 and the material channel, and the translation mechanism 6 in the furnace is arranged in the translation channel in the furnace. The translation mechanism 6 in the furnace is two The end is arranged at the rear of the conveying roller, the front end of the translation device 10 outside the furnace is provided with a front pusher 1 and a discharge mechanism 12, the rear of the furnace body 5 is provided with a rear pusher 11, and the push rod of the pusher 11 extends into Into the furnace body 5 and higher than the conveying roller, the front pusher 1 is set facing the feed gate 15, and the discharge mechanism 12, discharge gate 14 and rear pusher 11 are set on the same horizontal line Above; the inner walls of the two material passages are provided with a first air passage 16, the bottom of the first air passage 16 communicates with the bottom of the material passage, and the first heating element 8 is arranged in the first air passage 16, the described The tops of the two material passages are provided with a first circulation fan 17, the blades of the first circulation fan 17 are arranged in the first air passage 16, and the first air passage 16 where the first circulation fan 17 blades are located communicates with the top of the material passage The second circulation blower 18 is arranged at the top of the translation channel in the furnace, the second air channel 19 is set on the inwall of the translation channel in the furnace and the second heating element 20 is arranged in the second air channel 19, and the blade of the second circulation fan 18 is set In the second air channel 19, the bottom of the second air channel 19 communicates with the bottom of the translation channel in the furnace, and the second air channel 19 where the blades of the second circulating fan 18 are located communicates with the top of the translation channel in the furnace; The side where the top feed door 15 of the cooling chamber 4 is provided with a third circulating fan 2, the inner wall of the preheating cooling chamber 4 is provided with a third air channel 3, and the blades of the third circulating fan 2 are arranged on the third air channel 3 Inside, the third air channel 3 is divided into two layers connected up and down at the blade of the third fan 2, and one end of the third air channel 3 on the upper layer extends along the inner wall of the preheating cooling chamber 4 to the side where the discharge door 14 is located. , its bottom and side are connected with the preheating and cooling chamber 4, and the other end is closed, one end of the third air channel 3 on the lower floor extends downward along the inner wall of the preheating and cooling chamber 4, and its bottom and sides are connected with the preheating and cooling chamber 4 are connected, and the other end is closed. In the present invention, an intermediate valve 13 is provided at the connection between the preheating cooling chamber 4 and the material channel on the side where the discharge door 14 is located, and the intermediate valve 13 is driven by a cylinder (not shown in the figure) to move up and down to realize its opening and closing.

The furnace internal translation mechanism 6 mentioned above is two parallel chains driven by the first driving motor 9 arranged outside the furnace body 5, and the top ends of the chains are flush with the top ends of the conveying rollers. The outer translation device 10 of the furnace includes a support 10-1 and two parallel chains driven by the second driving motor 21, and the top of the support 10-1 is corresponding to the feeding door 15 and the discharging door 14. Two rows of balls are arranged, and the tops of the chain and the balls are flush with the tops of the conveying rollers.

The conveying process of the material in the present invention is: place the material frame on the conveying roller, the quantity of the material frame is enough to cover the conveying roller, the operator places the material in the material frame on the ball at the feed door 15, and pushes the material forward Machine 1 pushes the material frame containing the material towards the furnace body, each material frame is in close contact, the front material frame pushes the rear material frame backward, and the rearmost material frame on the side of the feeding door 15 is pushed to the translation mechanism in the furnace 6 on the chain, the first driving motor 9 drives the chain to transport the material frame to the side of the discharge door 14, and is pushed forward (towards the direction of the discharge door) under the push of the rear pusher 11, and the discharge door 14 The material frame at the position is pushed out of the discharge door 14 to the ball on the side of the discharge door 14 on the translation device 10 outside the furnace, and is pushed forward to the discharge mechanism 12. The operator removes the material in the material frame, And place the material frame on the chain of the translation device 10 outside the furnace, the chain is driven by the second drive motor 21 to transport the empty material frame to the discharge door 14 side, and the staff puts the material to be processed into the empty material frame , loop the above process.

The flow direction of the airflow in the material passage among the present invention is: the first heating element 8 generates heat, opens the first circulation blower 17, because the blade of the first circulation blower 17 is arranged in the first air passage 16, so the first air passage 16 The air flow inside is blown to the first air passage 16 on both sides of the blade by the first circulating fan 17, and because the first heating element 8 is added in the first air passage 16 to generate heat, the heat follows the air flow along the first air passage 16 to the material passage. After the material in the material channel is heated, the heat is relatively reduced, and then it enters the first air channel 16 again from the top of the material channel to realize the circulation of the air flow in the first air channel 16. The settings of the first air duct 16 and the first fan 17 in the two parallel material passages are the same, so the circulation of the air flow in the two is also the same, as shown by the arrows in FIG. 3 .

The flow direction of the airflow in the translation passage in the furnace in the present invention is similar to the flow direction of the airflow in the material passage, the difference between the two is only that the length of the second air passage 19 is longer than that of the first air passage 16, as shown by the arrow in Fig. 4 , which will not be described here.

The flow direction of the airflow in the preheating and cooling chamber of the present invention is: because the temperature of the heat-treated material near the discharge door 14 is higher, the side of the third air passage 3 on the upper floor is closed, and the third fan 2 can only move the airflow along the first The three-air duct 3 blows towards the end of the opening on one side of the discharge door 14. After the air passes through the heat-treated material, it is cooled. When passing through this side, the materials without heat treatment are preheated, the temperature of the airflow itself is relatively lowered, and it flows upward through the third air channel 3 on this side, and enters the upper layer again at the blade of the third fan 2 In the third air passage 3, the circulation of the air flow in the third air passage 3 is achieved. In the preheating and cooling chamber, the temperature of the material after heat treatment is relatively reduced, while the temperature of the material without heat treatment is relatively increased after preheating, which not only realizes heat exchange between the two, reduces energy waste, and saves energy , and the temperature of the material output from the discharge door 14 is relatively not too high, the ambient temperature at the discharge door 14 is also effectively reduced compared with the prior art, and the operating environment for the staff is ideal.

In the present invention, an intermediate gate 13 is set at the communication place between the preheating cooling chamber 4 and the material channel on one side of the discharge door. Since the front pusher 1 and the rear pusher 11 are spaced and discontinuous when pushing the material frame, its The shrinkage of the push rod realizes the pushing of the material frame. When the push rod of the rear pusher 11 shrinks, the material frame is not pushed forward. At this time, the cylinder (not shown in the figure) pushes the middle gate 13 to close to reduce the energy passing through. The discharge door radiates out of the furnace body, thereby causing energy loss and increasing the temperature of the operating environment, further saving energy. When the rear pusher 11 pushes the material frame forward, the cylinder (not shown) pushes the middle The gate 13 is opened to ensure that the material frame can pass through smoothly.

In the present invention, a set of PLC intelligent programmable controller is adopted to control the present invention with action commands, and all actions are automatically completed. This part is prior art and does not belong to the protection content of the present invention, and this specification will not describe it in detail.

All parts that are not specifically described in the description of the present invention, such as heating elements, etc., are all prior art, or can be realized by prior art. Moreover, the specific implementation cases described in the present invention are only preferred implementation cases of the present invention, and are not intended to limit the implementation scope of the present invention. That is, all equivalent changes and modifications made according to the content of the patent scope of the present invention should be regarded as the technical scope of the present invention.

Claims (4)

1. A push-rod furnace with waste heat utilization, characterized in that it includes a furnace body (5), the front end of the furnace body (5) is provided with a feed door (15) and a discharge door (14), and the furnace body The front of (5) is equipped with a translation device (10) outside the furnace, the front part of the furnace body (5) is equipped with a preheating cooling chamber (4), and the middle part is provided with two parallel material passages along the length of the furnace body (5). A translation channel in the furnace is provided, and the preheating cooling chamber (4) and the translation channel in the furnace are respectively connected to the front end and rear end of the two material channels, and conveying rollers are arranged in the preheating cooling room (4) and the material channel, A furnace translation mechanism (6) is set in the furnace translation channel, and the two ends of the furnace translation mechanism (6) are arranged behind the conveying rollers, and the front end of the furnace outer translation device (10) is provided with a front pusher ( 1) and the discharge mechanism (12), the rear pusher (11) is arranged behind the furnace body (5), and the push rod of the pusher (11) extends into the furnace body (5) and is higher than the conveying roller, The front pusher (1) is set facing the feed door (15), and the discharge mechanism (12), discharge door (14) and rear pusher (11) are set on the same horizontal line ; The inner walls of the two material passages are provided with a first air duct (16), the bottom of the first air duct (16) communicates with the bottom of the material passage, and a first heating element ( 8), the tops of the two material passages are provided with a first circulation fan (17), the blades of the first circulation fan (17) are set in the first air duct (16), and the first circulation fan (17) The first air passage (16) where the blades are located communicates with the top of the material passage; A second circulation fan (18) is provided on the top of the translation channel in the furnace, a second air duct (19) is provided on the inner wall of the translation channel in the furnace, and a second heating element (20) is arranged in the second air duct (19). The blades of the second circulation fan (18) are arranged in the second air duct (19), and the bottom of the second air duct (19) communicates with the bottom of the translation channel in the furnace. Road (19) communicates with the top of the translational channel in the furnace; The side of the top feed door (15) of the preheating cooling chamber (4) is provided with a third circulation fan (2), and the inner wall of the preheating cooling chamber (4) is provided with a third air duct (3) , the blades of the third circulating fan (2) are arranged in the third air channel (3), and the third air channel (3) is divided into two layers connected up and down at the blades of the third fan (2), and the upper layer One end of the third air duct (3) extends along the inner wall of the preheating cooling chamber (4) to the side where the discharge door (14) is located, its bottom and sides communicate with the preheating cooling chamber (4), and the other end is closed. One end of the third air passage (3) on the lower floor extends downward along the inner wall of the preheating cooling chamber (4), its bottom and side parts communicate with the preheating cooling chamber (4), and the other end is closed. 2. The push rod furnace with waste heat utilization according to claim 1, characterized in that: an intermediate valve (13) is set at the connection between the preheating cooling chamber (4) and the material channel on the side where the discharge door (14) is located . 3. The push rod furnace with waste heat utilization according to claim 1, characterized in that: the translation mechanism (6) in the furnace is driven by the first drive motor (9) arranged outside the furnace body (5) Two parallel chains are driven, and the tops of the chains are flush with the tops of the conveying rollers. 4. The push rod furnace with waste heat utilization according to claim 1, characterized in that: the translation device (10) outside the furnace includes a support (10-1) and a second driving motor (21) driven Two chains arranged in parallel, two rows of balls are arranged on the top of the bracket (10-1) corresponding to the feed door (15) and the discharge door (14), and the tops of the chains and balls are connected with the conveying roller tops are flush.

Images