A method for discharging materials from a push plate furnace using inertia force as the main thrust

Abstract

The present invention discloses a method for discharging materials from a push plate furnace with inertia force as the main thrust, and belongs to the technical field of sintering furnaces. The method is to place the push plate furnace on two parallel tracks, apply a reverse force F01 opposite to the discharging direction to the push plate furnace to make the push plate furnace perform negative acceleration relative to the discharging direction, so that all the material boxes arranged vertically close to each other on the pushing slide rail in the furnace tube form a forward inertia force F1, and a main push plate is arranged behind the furnace tube, with the inertia force F1 as the main thrust, and the forward thrust F2 applied by the main push plate to all the material boxes arranged vertically close to each other is used as the auxiliary thrust to push all the material boxes arranged front and back in the entire furnace tube to slide forward, and the main push plate is provided with a discharging pushing stroke, and a group of material boxes located at the front section of the furnace tube are pushed out of the furnace tube by a discharging pushing stroke of the main push plate. The main advantage is that the pushing pressure on the material box when it is discharged from the furnace can be reduced several times, so that when the furnace capacity is increased, there is almost no need to consider the limitation of the pushing pressure on the material box when it is discharged from the furnace.

Description

Technical Field

[0001] The invention relates to a material discharging method of a push plate furnace using inertia force as a main thrust, belonging to the technical field of sintering furnaces. Background Art

[0002] A type of cemented carbide sintering furnace, the main body of which adopts a tubular furnace structure, has a furnace tube that can be connected from front to back, and a longitudinal push slide rail is arranged inside the furnace tube. The inner space of the furnace tube has a preheating section at the rear, a high-temperature section in the middle, and a cooling section at the front. The tracks of the preheating section and the cooling section are steel tracks with low sliding resistance, while the high-temperature section adopts a ceramic track that is resistant to high temperatures but has high sliding resistance. An electric heating system is arranged on the outer wall of the furnace tube, and an insulating layer is arranged between the outer periphery of the furnace tube and the furnace shell. A propulsion device is also arranged at the rear of the sintering furnace, which has a push rod of a set length that can penetrate a certain depth into the furnace tube. The cemented carbide sintering furnace has several high-temperature resistant material boxes that are adapted to the diameter of the furnace tube. The material boxes have high-temperature resistant ceramic bottom plates. According to needs, there are layers in the material boxes, and the cemented carbide blanks to be sintered fill each layer of the material boxes. During sintering, the push rod acts on the ceramic bottom plate of the material box to push the material boxes one by one from the rear port of the furnace tube into the furnace tube. The material boxes that enter the furnace tube in turn slide forward slowly on the pushing rails. When passing through the preheating section, the moisture in the cemented carbide blank is gradually evaporated and the blank becomes hard. When passing through the high-temperature section, the cemented carbide blank completes high-temperature sintering. When passing through the cooling section, it is cooled to form a cemented carbide product (there may be a grinding process in the later stage).

[0003] Since the contact position when the push rod pushes the material box is the ceramic bottom plate of the material box, this type of cemented carbide sintering furnace is also called a push plate furnace.

[0004] Problems in the above prior art:

[0005] 1. The furnace capacity is too small. Since the material boxes are pushed in and out of the furnace by the push rod pushing the bottom plate of the last material box, the ceramic bottom plate of the material box needs to withstand a huge thrust to enable all the material boxes in the entire furnace tube to overcome the friction between the pushing rail and slide forward. The ceramic bottom plate is prone to deformation when it is subjected to too much thrust at a temperature close to 1800°C. Therefore, the weight and number of material boxes that can be pushed in the above-mentioned push plate furnace are limited, that is, the diameter and length of the furnace tube will be limited, which will lead to low production efficiency and cannot meet the production requirements of large objects and large quantities.

[0006] 2. Low thermal energy utilization rate. The traditional method of loading and unloading material boxes is to push a material box into the furnace tube from the rear port of the furnace tube in turn, so that the material box at the front end of a furnace tube is pushed out from the front port of the furnace tube. This is continuous, so that the furnace doors at the front and rear ports of the furnace tube are constantly opened at very short intervals, so that the cold air outside the furnace tube is sucked in a large amount under the negative pressure inside the furnace tube (formed by the exhaust fan to discharge the wax gas), and the heat loss in the furnace cannot be controlled to a minimum, resulting in a large amount of heat loss in the furnace.

[0007] After searching, no technical solution to improve the above-mentioned problem has been found. Summary of the invention

[0008] The technical problem to be solved by the present invention is: how to realize the exponential increase of the total capacity of the furnace tube and reduce the heat loss in the furnace tube by improving the discharging method.

[0009] In view of the above problems, the technical solution proposed by the present invention is:

[0010] A method for discharging materials from a push-plate furnace using inertia force as a main thrust: placing the push-plate furnace on two parallel tracks, applying a reverse force F01 opposite to the discharging direction to the push-plate furnace to make the push-plate furnace perform negative acceleration motion relative to the discharging direction, so that all material boxes arranged longitudinally close to each other on the pushing slide rail in the furnace tube form a forward inertia force F1, a main push plate is arranged at the rear of the furnace tube, the inertia force F1 is used as a main thrust, and the forward thrust F2 applied by the main push plate to all the material boxes arranged longitudinally close to each other is used as an auxiliary thrust to push all the material boxes arranged front and back in the entire furnace tube to slide forward, the main push plate is provided with a discharging propulsion stroke, and a group of material boxes located at the front section of the furnace tube are pushed out of the furnace tube by the one discharging propulsion stroke of the main push plate.

[0011] Furthermore, the furnace tube is equally divided into several sections, the preheating section, high temperature section and cooling section of the furnace tube each have an integer number of sections, each section can arrange an equal number of material boxes in a front-to-back manner, and the distance of a discharge pushing stroke of the main push plate is equal to the length of a section.

[0012] Furthermore, the push plate furnace moves out and returns once to complete the unloading of a group of material boxes, and the unloading of a group of material boxes includes the following steps:

[0013] S1, the push plate furnace is in a stationary state, the front furnace door is opened, and the front end of the main push plate is pre-pressed against the rear end of the last material box in the last group of material boxes that have completed preliminary preheating in the furnace tube preheating section;

[0014] S2, start the push plate furnace from a stationary state and accelerate it to slide forward;

[0015] S3, the push plate furnace slides forward to reach the set speed, the rear furnace door of the furnace tube opens, and the reverse force F01 is continuously applied to the push plate furnace to form a negative acceleration, and all the material boxes in the furnace tube obtain an inertial force F1. At the same time, the push rod applies a forward thrust F2, and all the material boxes in the furnace tube slide forward. The front group of material boxes in the cooling section of the furnace tube begins to be pushed out of the front end of the furnace tube;

[0016] S4, the main push plate completes a material discharging and pushing stroke, and the first group of material boxes in the furnace tube are all pushed out of the furnace tube;

[0017] S5. The main push plate retracts, the front furnace door and the rear furnace door are closed, and the last group section in the preheating section is vacant.

[0018] Furthermore, in step S3, the reverse force F01 continuously increases as the push plate furnace slides forward, but the increase amount of the continuously increasing reverse force F01 gradually decreases.

[0019] Furthermore, a suspension frame and a gravity string formed by a plurality of gravity bodies connected in series in an articulated manner are arranged at the rear of the push plate furnace, the weight of the rear gravity body is less than the weight of the front gravity body, and a traction mechanism with a traction rope is arranged between the push plate furnace and the gravity string. The sliding kinetic energy of the push plate furnace reaching the set sliding speed is used to lift each gravity body of the gravity string from front to back in sequence on the suspension frame through the traction rope. At the same time, the gravity of the gravity body that is continuously lifted upward is converted through the traction mechanism into a reverse force F01 that acts on the push plate furnace and increases continuously but the increase is initially reduced.

[0020] Furthermore, the traction mechanism includes fixed pulleys arranged at the top and bottom of the suspension frame, the traction rope passes around the fixed pulleys at the top and bottom of the suspension frame, the rear section hangs downward, the rear end of which is connected to the gravity body at the front end of the gravity string, and the front section extends horizontally to the sliding line of the push plate furnace, and the front end of which can be connected to the push plate furnace when the push plate furnace reaches the set sliding speed.

[0021] Furthermore, two parallel hook-shaped gravity rails in the left and right sides, which are shaped like fish hooks when viewed from the side, are arranged at the rear of the suspension frame; the hook-shaped gravity rail is arranged as an upper upright section and a lower U-shaped section, and the front section and the rear section of the U-shaped section are arranged as a front steep slope section and a rear steep slope section respectively; the bottom connecting section between the front steep slope section and the rear steep slope section is a bottom arc section, and the upper end of the front steep slope section is connected to the lower end of the upright section; running wheels running on the hook-shaped gravity rail are arranged on both sides of the bottom of each gravity body of the gravity string, and the gravity string is placed in the U-shaped section of the hook-shaped gravity rail; when the traction rope does not apply an upward traction force, the multiple gravity bodies at the front, middle and rear parts of the gravity string naturally stay at the front steep slope section, the bottom arc section and the rear steep slope section of the U-shaped section by gravity balance; when the traction rope applies an upward traction force, the gravity string loses its gravity balance and begins to rise upward along the front steep slope section and the upright section.

[0022] Furthermore, reverse rail surfaces are arranged on the outer sides of the two hook-shaped gravity rails, and limiting wheels running on the reverse rail surfaces are arranged under the running wheels on both sides of the gravity body, so as to limit the gravity string on the two hook-shaped gravity rails.

[0023] Furthermore, it is assumed that the gravity body includes a frame and a counterweight block fixed in the frame, and the weight of each gravity body is determined by the volume and / or number of the counterweight block.

[0024] Furthermore, a connecting mechanism between the traction rope and the push-plate furnace is arranged between the bottom of the middle and rear section of the push-plate furnace and the two rails, and the connecting mechanism is provided with: a pull rod, a hanging cake fixed at the front end of the pull rod, a stabilizing support wing fixed at the bottom of the pull rod and arranged along the length direction of the pull rod, a pull rod support body fixed to the ground, a slide groove 1 provided at the top of the pull rod support body for accommodating and limiting the stabilizing support wing, a blocker fixed at the rear end of the bottom of the push-plate furnace, a blocker plate is provided at the front end of the blocker, a buffer spring is provided between the blocker plate and the blocker, a longitudinal slide groove 2 is provided at the bottom of the blocker and the blocker plate, the stabilizing support wing of the pull rod is placed in the slide groove 1 at the top of the pull rod support body, the pull rod is placed in the slide groove 2 at the bottom of the blocker and the blocker plate, and before the push-plate furnace starts to accelerate, the distance from the blocker plate to the hanging cake at the front end of the pull rod is set to be equal to the distance from the push-plate furnace to the set speed when it starts to accelerate.

[0025] Furthermore, a tubular stop sleeve is provided at the connection part of the pull rod and the traction rope, the front end of the traction rope and the rear end of the pull rod are fixed in the tube hole of the stop sleeve, the annular rear end surface of the stop sleeve outside the traction rope is a stop surface one, and a stop baffle is provided on the pull rod support body behind the slide groove one, and a slide groove three is provided on the stop baffle plate for only the traction rope to slide through, and the front side of the stop baffle is located on the outer periphery of the slide groove three as a stop surface two that can fit with the stop surface one to prevent the traction rope from retreating, and the fixed position of the stop baffle on the pull rod support body can be adjusted forward and backward, which is used to adjust the height of the front end of the gravity string on the front steep slope section, and then adjust the size of the initial reverse force F01.

[0026] Furthermore, after the step S4 is completed, the push plate furnace stops sliding forward under the action of the reverse force F01, and immediately starts to return under the action of the reverse force F01 or under the combined action of the reverse force F01 and the external retracting force F02, and step 5 is completed on the way back.

[0027] Furthermore, during the execution of step S3, the push plate furnace stops sliding forward under the action of the reverse force F01, and immediately starts to return under the action of the reverse force F01 or under the combined action of the reverse force F01 and the external retracting force F02, and the subsequent process of step S3 and steps S4 and S5 are completed on the way back.

[0028] Further, a feeding platform that can communicate with the preheating section is arranged behind the preheating section of the push plate furnace, the front furnace door is located between the preheating section and the feeding platform, a marshaling platform that is transversely adjacent to the feeding platform is arranged outside the track beside the feeding platform, a row push plate is arranged beside the marshaling platform, and a single push plate is arranged behind the marshaling platform, the main push plate is located behind the feeding platform, and the main push plate is also provided with a feeding pushing stroke, the push plate furnace discharging method includes a feeding method of the push plate furnace, and the feeding method of the push plate furnace includes the following steps:

[0029] Step 1: When the push plate furnace has finished unloading a group of material boxes, place a material box at the rear of the marshaling platform, and push the material box to the front of the marshaling platform with a single push plate. Repeat the above operation several times until a group of material boxes are fully arranged on the marshaling platform;

[0030] Step 2: Push a group of full material boxes on the marshaling table horizontally to the feeding table by the push plate;

[0031] Step 3: Open the front furnace door;

[0032] Step 4: The main push plate performs a feeding push stroke to push a group of material boxes on the marshaling table longitudinally into a group section that is vacant at the rear end of the preheating section after step S5 is completed;

[0033] Step 5: The main push plate exits the preheating section and closes the front furnace door.

[0034] Beneficial effect: During the unloading process of the material box in the push-plate furnace, the thrust on the ceramic bottom plate of the material box can be reduced by more than 90%, so that the volume of the material box and the number of material boxes in the furnace tube can be significantly increased, thereby increasing the content of the push-plate furnace several times and significantly improving the sintering processing efficiency; the traditional single material box enters and exits the furnace and opens the front furnace door and the rear furnace door once, which is improved to a group of multiple material boxes entering and exiting the furnace and opening the front furnace door and the rear furnace door once, which significantly reduces the opening frequency of the front furnace door and the rear furnace door. Although the latter opening time is longer than the former opening time, the total time of opening the front furnace door and the rear furnace door of a group of multiple material boxes entering and exiting the furnace is much shorter than that of a single material box entering and exiting the furnace. The total time of opening the front furnace door and the rear furnace door multiple times when taking out the furnace is much shorter, which can significantly reduce the amount of cold air entering the furnace tube and significantly improve the thermal utilization efficiency of the push-plate furnace; in the forward process of the push-plate furnace, the gravity string is raised on the suspension frame, which actually converts most of the kinetic energy of the push-plate furnace when moving forward into the gravitational potential energy of the gravity string rising, and in the return process of the push-plate furnace, the gravity potential energy can be converted into the kinetic energy of the push-plate furnace retreating, thereby greatly saving the operating energy consumption of the push-plate furnace; the thrust received by the material box when it comes out of the furnace is small, that is, the extrusion force received is small, which reduces the compressive deformation of the material box in a high temperature environment, thereby significantly extending the service life of the material box; the operation is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic side view of the push plate furnace described in Example 1;

[0036] Figure 2 for Figure 1 A partial schematic diagram of

[0037] Figure 3 It is a partial side view of the push plate furnace described in Example 1;

[0038] Figure 4 The figure is a schematic side view of the push plate furnace described in the first embodiment, showing that the push plate furnace is sliding forward, and arrow A indicates the direction in which the push plate furnace slides forward;

[0039] Figure 5 The side view schematic diagram of the push plate furnace described in the first embodiment shows that when the push plate furnace slides forward, it is subjected to a reverse force F01 opposite to the running direction, and the material box obtains an inertial force F1 toward the front end;

[0040] Figure 6 for Figure 5 A partial schematic diagram of the furnace tube, showing that the main push plate exerts a forward thrust F2 on the material box in the furnace tube;

[0041] Figure 7 This is a schematic side view of the push plate furnace described in Example 1, showing that the push plate furnace slides forward and stops, the front group of material boxes in the furnace tube has been pushed out to the temporary storage platform, the main push plate has retracted to its original position, and the last group of preheating sections is vacated, waiting for the next group of material boxes to be pushed in;

[0042] Figure 8 It is a three-dimensional schematic diagram of the push plate furnace and the suspension frame etc. described in the first embodiment;

[0043] Fig. 9 It is a schematic side view of the push plate furnace and the suspension frame etc. of the embodiment 1, in which the track is hidden;

[0044] Fig.10 It is a schematic diagram of the traction mechanism, the connecting mechanism and the hook-shaped gravity rail described in the first embodiment. The figure also shows that the gravity string lifted by the traction rope forms a reaction force F01 on the push plate furnace. The push plate furnace and the rail are hidden in the figure;

[0045] Fig.11 The figure is a schematic side view of the gravity string naturally staying on the U-shaped section of the hook-shaped gravity rail according to the first embodiment. In the figure, since the weight of the front gravity body in the gravity string is greater than the weight of the rear gravity body, the height of the front gravity body is lower than the height of the rear gravity body;

[0046] Fig.12 It is a three-dimensional schematic diagram of the gravity body described in Example 1;

[0047] Fig.13 It is a three-dimensional schematic diagram of the connection part between the traction rope and the connecting mechanism according to the first embodiment;

[0048] Fig.14 It is a disassembled schematic diagram of the front end of the traction rope, the stop sleeve body and the rear end of the pull rod described in the first embodiment;

[0049] Fig.15 It is a three-dimensional schematic diagram of the rear end of the pull rod support body described in Example 1;

[0050] Fig.16 It is a three-dimensional schematic diagram of the rear end of the push plate furnace described in Example 1;

[0051] Fig.17 It is a three-dimensional schematic diagram of the structural relationship between the blocker and the pull rod, etc. described in the first embodiment;

[0052] Fig.18 It is a disassembly schematic diagram of the blocker, buffer spring and blocker plate etc. described in the first embodiment;

[0053] Fig.19 This is a three-dimensional schematic diagram of the blocker and its blocking plate when approaching the hanging cake according to the first embodiment, and the figure shows that the sliding wheels on the tracks on both sides are connected to the bottom of the push plate furnace through the support plate;

[0054] Fig. 20 It is a three-dimensional schematic diagram of the front end of the tie rod support body of the first embodiment extending to the lower front section of the push plate furnace located at the starting point and close to the position of the wheel pair shaft, and the structural relationship between the drive motor and the wheel pair shaft is also shown in the figure;

[0055] Fig.21 It is a three-dimensional schematic diagram of the positional relationship between the marshaling platform and its related settings and the push plate furnace described in Example 2;

[0056] Fig. 22 It is a top view schematic diagram of the positional relationship between the marshaling platform and its related settings and the push plate furnace described in the second embodiment;

[0057] Fig.23 This is a schematic side view of the push plate furnace described in Example 3, which shows that the push plate furnace begins to return under the combined action of the reverse force F01 and the external retraction force F02. Arrow A indicates the direction in which the push plate furnace returns backward. At this time, the material box still has an inertial force F1, and the main push plate still applies a forward thrust F2 to the material box in the furnace tube. The push plate furnace is completing the discharge.

[0058] Fig.24 This is a schematic side view of the push plate furnace described in the fourth embodiment, in which the track is interrupted;

[0059] Fig.25 It is a schematic side view of a push plate furnace described in the prior art;

[0060] Fig.26 It is a schematic side view of the material box described in the prior art;

[0061] The above attached Figure 1 , 3 The front part of tracks 4, 5, 7, 8, 10, and 23 is interrupted and omitted.

[0062] In the figure: 1. Push plate furnace; 101. Feeding platform; 102. Temporary storage platform; 103. Front furnace door; 104. Rear furnace door; 105. Sliding wheel; 106. Support plate; 107. Driving motor; 108. Wheel pair shaft; 109. Furnace shell; 2. Furnace tube; 201. Preheating section; 202. High temperature section; 203. Cooling section; 204. Pushing slide rail; 205. Group section; 3. Suspension frame; 301. Fixed pulley; 4. Traction rope; 5. Gravity string; 501. Gravity body; 5011. Frame; 5012. Counterweight block; 502. Traveling wheel; 503. Limiting wheel; 6. Hook-shaped gravity rail; 601. Upright section; 602. U-shaped section; 6021. Front steep slope section; 6022. Rear steep slope section; 6023. Bottom arc shaped segment; 603, reverse rail surface; 7, connecting mechanism; 701, pull rod; 7011, hanging cake; 7012, stable support wing; 702, pull rod support body; 7021, slideway one; 703, blocker; 7031, buffer hole; 704, blocker plate; 7041, guide pressure rod; 705, slideway two; 706, buffer spring; 707, stop sleeve; 7071, stop surface one; 708, stop baffle; 7081, stop surface two; 709, slideway three; 8, marshalling table; 9, material box; 901, ceramic bottom plate; 10, track; 11, push rod; 12, main electric cylinder; 13, main push plate; 14, single push electric cylinder; 15, single push plate; 16, row push electric cylinder; 17, row push plate; 18, strong spring. DETAILED DESCRIPTION

[0063] To facilitate the understanding of the present invention, the push plate furnace and its working principle which belong to the prior art part involved in this application are briefly described below in conjunction with the accompanying drawings.

[0064] like Fig.25 , 26As shown, the push plate furnace 1 adopts a tubular furnace structure, with a total length of generally 15-25 meters. It has a furnace tube 2 that can be connected front and back, and a longitudinal push slide rail 204 is provided in the furnace tube 2. The inner space of the furnace tube 2 has a preheating section 201 at the rear, a high temperature section 202 in the middle, and a cooling section 203 at the front. The push slide rails 204 of the preheating section 201 and the cooling section 203 are steel rails with low sliding resistance, and the high temperature section 202 adopts a ceramic rail that is resistant to high temperatures but has large sliding resistance. A front furnace door 103 and a rear furnace door 104 are respectively provided at the front and rear ends of the furnace tube 2. A negative pressure device is provided in the furnace tube 2 to collect the dewaxing gas overflowed from the hard alloy blank in the furnace tube 2 at high temperature. The front furnace door 103 and the rear furnace door 104 are mainly used to control the amount of external gas entering the furnace tube 2 under the negative pressure formed by the negative pressure device. The outer wall of the furnace tube 2 is provided with an electric heating system, and there is a heat insulation layer between the outer periphery of the furnace tube 2 and the furnace shell 109. A propulsion device for pushing the material box 9 is also provided at the rear of the push plate furnace 1, which has a push rod 11 of a set length that can penetrate a certain depth of the furnace tube and a push plate at the front end of the push rod 11. The push plate furnace 1 has a plurality of high temperature resistant material boxes 9 adapted to the diameter of the furnace tube 2, and the material box 9 has a high temperature resistant ceramic bottom plate 901. According to needs, there are layers in the material box 9, and the hard alloy blanks for sintering are filled in each layer of the material box 9. During sintering, the push plate provided on the push rod 11 acts on the ceramic bottom plate 901 of the material box 9 to push the material boxes 9 one by one from the rear port of the furnace tube 2 into the furnace tube 2 in sequence. The material boxes 9 that enter the furnace tube 2 in sequence slide forward slowly on the pushing slide rail 204 with the front and back of each other. When passing through the preheating section 201, the moisture of the cemented carbide blank is gradually evaporated and the blank becomes hard. When passing through the high temperature section 202, the cemented carbide blank completes high temperature sintering. When passing through the cooling section 203, it is cooled to form a cemented carbide product (which may be polished later).

[0065] The present invention will be further described below in conjunction with the accompanying drawings:

[0066] Embodiment 1, as Figure 1 —7.

[0067] A method for discharging materials from a push-plate furnace using inertia force as the main thrust is to place the push-plate furnace 1 on two parallel tracks 10, and apply a reverse force F01 opposite to the discharging direction to the push-plate furnace 1 to make the push-plate furnace 1 perform negative acceleration motion relative to the discharging direction, so that all material boxes 9 arranged longitudinally close to each other on the pushing slide rail 204 in the furnace tube 2 form a forward inertia force F1, and a main push plate 13 is arranged behind the furnace tube 2, with the inertia force F1 as the main thrust, and the forward thrust F2 applied by the main push plate 13 to all the material boxes 9 arranged longitudinally close to each other is used as an auxiliary thrust to push all the material boxes 9 arranged front and back in the entire furnace tube 2 to slide forward, and the main push plate 13 is provided with a discharging propulsion stroke, and a group of material boxes 9 located at the front section of the furnace tube 2 is pushed out of the furnace tube 2 by a discharging propulsion stroke of the main push plate 13.

[0068] Here, the inertia force F1 plus the forward thrust F2 is greater than the static friction between the material box 9 and the pushing slide rail 204, but the inertia force F1 and the forward thrust F2 are both smaller than the static friction between the material box 9 and the pushing slide rail 204. The purpose of this setting is that the material box 9 cannot be pushed forward by the inertia force F1 alone, but must be pushed forward by the forward thrust F2 applied by the main push plate 13 to enable the material box 9 to slide forward. In this way, the number of material boxes 9 pushed out at one time can be accurately controlled by controlling the propulsion stroke of the main push plate 13, thereby avoiding the loss of control of the number of material boxes 9 pushed out.

[0069] In this way, through the above method, each material box 9 obtains the inertia force F1 at the same time, and within the range of less than the static friction force between the material box 9 and the pushing slide rail 204, the inertia force F1 of the material box 9 can be increased as much as possible, and the forward thrust F2 of the material box 9 can be reduced accordingly, so that the pressure between the material boxes 9 and the material boxes 9 is greatly reduced during discharge, and the reduction can reach more than 90%. Therefore, the capacity of the furnace tube 2 can be expanded several times as needed, making the material box 9 larger in volume and more in number, thereby improving the production efficiency of the sintering process several times.

[0070] It should be noted here that the static friction between the material box 9 and the pushing slide rail 204 is only a representation of an ideal condition. In actual working conditions, it is inevitable that there is a certain degree of friction between the material box 9 and the wall of the furnace tube 2.

[0071] Since a group of material boxes 9 is pushed out by a discharge pushing stroke, a group can include several or even dozens of material boxes 9, which can reduce the number of times the front furnace door 103 and the rear furnace door 104 are opened by several times, greatly reducing the amount of external cold air entering, thereby improving the thermal efficiency of the push plate furnace 1.

[0072] The above-mentioned reverse force F01 opposite to the discharge direction is applied to the push plate furnace 1 to make the push plate furnace 1 perform negative acceleration motion relative to the discharge direction, including the following two situations:

[0073] One method is to first make the push plate furnace 1 slide from a stationary state at the starting point to a direction consistent with the discharge direction, and after reaching the set speed, apply a backward reverse force F01 to the push plate furnace 1 to make the push plate furnace 1 perform a negative acceleration motion relative to the discharge direction, that is, a deceleration motion similar to braking. In this process, the material box 9 forms a forward inertial force F1, which is similar to a person sitting on a long seat sliding forward when the subway decelerates.

[0074] The other method is to apply a reverse force F01 opposite to the discharge direction to the stationary push plate furnace 1, so that the push plate furnace 1 starts to accelerate backward (also a negative acceleration motion relative to the discharge direction). In this process, the material box 9 also forms a forward inertial force F1.

[0075] The present application prefers the first of the above two situations, and further description is given below based on this situation.

[0076] The thrust of the main push plate 13 comes from the main electric cylinder 12 arranged at the rear of the push plate furnace 1 , and the main electric cylinder 12 pushes the main push plate 13 through the push rod 11 .

[0077] In order to facilitate the sliding of the push plate furnace 1, sliding wheels 105 running on the rails 10 are respectively provided on both sides of the bottom of the push plate furnace 1.

[0078] The forward thrust F2 applied by the main push plate 13 to all the material boxes 9 arranged longitudinally close to each other is actually just the main push plate 13 extending into the preheating section 201 and acting on the ceramic bottom plate 901 of the last material box 9 among all the material boxes 9, applying the forward thrust F2 to the last material box 9. Since all the material boxes 9 are arranged longitudinally close to each other in the furnace tube 2, the forward thrust F2 applied to the last material box 9 can be transmitted to each of the previous material boxes 9.

[0079] The push plate furnace 1 is provided with a power drive system including a drive motor 107, which is used to drive the push plate furnace 1 to start acceleration and return to the original position. The external retraction force F02 described later is provided by the drive motor 107. Fig. 20 .

[0080] Furthermore, the furnace tube 2 is equally divided into a number of sections, and the number of sections of the preheating section 201, the high temperature section 202 and the cooling section 203 of the furnace tube 2 is an integer, and each section can arrange a group of equal number of material boxes 9 in a front-to-back manner, and the distance of one material discharging and pushing stroke of the main push plate 13 is equal to the length of one section. In this way, the main push plate 13 completes one material discharging and pushing stroke forward at the rear of the preheating section 201, and can push out a group of material boxes 9 at the rear end of the cooling section 203, that is, the rear end of the furnace tube 2.

[0081] Here, the number of groups of the preheating section 201, the high temperature section 202 and the cooling section 203 of the furnace tube 2 is an integer, which can be as shown in the attached figure. Figure 4 The examples shown are:

[0082] The length of the preheating section 201 is two sections, and two groups of material boxes 9 can be arranged longitudinally, with eight material boxes 9 in one group (actually, there can be more than ten or even dozens of material boxes 9);

[0083] The high temperature section 202 has a length of three sections, and three groups of material boxes 9 can be arranged longitudinally;

[0084] The cooling section 203 has a length of two sections, and two groups of material boxes 9 can be arranged longitudinally.

[0085] Thus, a total of seven groups 205 are provided in the furnace tube 2 , which can hold seven groups of material boxes 9 . It should be noted that the groups 205 may not have any marking arrangement in the furnace tube 2 .

[0086] The push plate furnace 1 is set to go out once and return once to complete the unloading of a group of material boxes 9. The unloading of a group of material boxes 9 includes the following steps:

[0087] S1, the push plate furnace 1 is in a stationary state, the front furnace door 103 is opened, and the front end of the main push plate 13 is pre-pressed against the rear end of the last material box 9 in the last group of material boxes 9 that have completed preliminary preheating in the furnace tube preheating section 201;

[0088] S2, start the push plate furnace 1 from a stationary state and accelerate it to slide forward (completed by the power drive system), see Figure 4 ;

[0089] S3, the push plate furnace 1 slides forward to reach the set speed, the power drive system stops providing forward driving force, the rear furnace door 104 of the furnace tube 2 opens, and the reverse force F01 is continuously applied to the push plate furnace 1 to form negative acceleration (the push plate furnace 1 starts to decelerate and slide), and all the material boxes 9 in the furnace tube 2 obtain the inertial force F1. At the same time, the push rod 11 applies the forward thrust F2, and all the material boxes 9 in the furnace tube 2 slide forward. The front group of material boxes 9 in the cooling section 203 of the furnace tube 2 begins to be pushed out of the front end of the furnace tube 2, see Figure 5 ;

[0090] S4, the main push plate 13 completes a discharge pushing stroke, and the first group of material boxes 9 in the furnace tube 2 are all pushed out of the furnace tube 2. Figure 7 ;

[0091] S5, the main push plate 13 retracts, the front furnace door 103 and the rear furnace door 104 are closed, and the last group section in the preheating section 201 is vacant. Figure 7 .

[0092] After the above step S4 is completed, the push plate furnace 1 stops sliding forward under the action of the reverse force F01, and immediately starts to return under the action of the reverse force F01 or under the combined action of the reverse force F01 and the external retracting force F02 (provided by the power drive system), and step 5 is completed on the way of the push plate furnace 1 returning.

[0093] The reverse force F01 described in step S3 continues to increase as the push plate furnace 1 slides forward, but the increase in the reverse force F01 gradually decreases. Here, the reverse force F01 is continuously increased, and the magnitude of the inertial force F1 can be maintained as much as possible when the speed of the push plate furnace 1 sliding forward gradually decreases, but the gradual reduction in the increase in the reverse force F01 can appropriately extend the sliding time of the push plate furnace 1, ensuring that a group of material boxes 9 have a sufficiently long time to be discharged from the furnace. Otherwise, if the time to be discharged from the furnace is too short, the discharge speed will be increased accordingly, and the blanks in the last group of material boxes 9 in the preheating section are not strong enough due to the short preheating hardening time, and it is difficult to withstand too much impact force at the moment of rapid sliding-stopping.

[0094] Preferably, a temporary storage platform 102 for temporarily storing a group of out-of-furnace material boxes 9 is provided at the rear section of the push-plate furnace 1 behind the furnace tube 2 .

[0095] The front furnace door 103 and the rear furnace door 104 are generally gate-type doors.

[0096] like Figure 8 As shown in FIG. 11, a suspension frame 3 and a gravity string 5 formed by connecting a plurality of gravity bodies 501 in a hinged manner are arranged at the rear of the push plate furnace 1. The weight of the rear gravity body 501 is less than the weight of the front gravity body 501. A traction mechanism with a traction rope 4 is arranged between the push plate furnace 1 and the gravity string 5. The sliding kinetic energy of the push plate furnace 1 reaching the set sliding speed is used to sequentially lift the gravity bodies 501 of the gravity string 5 from front to back on the suspension frame 3 through the traction rope 4. At the same time, the gravity of the gravity body 501 that is continuously lifted upward is converted into a continuously increasing but initially decreasing reverse force F01 acting on the push plate furnace 1 through the traction mechanism. The advantage of using the gravity string 5 is that the number of gravity bodies 501 and the weight of each gravity body 501 can be set as needed, so that the change in the reverse force F01 can be adjusted as needed. In addition, when the push plate furnace 1 moves forward, the gravity string 5 is raised on the suspension frame 3, which actually converts most of the kinetic energy of the push plate furnace 1 moving forward into the gravitational potential energy of the gravity string 5 rising, and when the push plate furnace 1 returns, the gravitational potential energy can be converted into the kinetic energy of the push plate furnace 1 retreating, thereby greatly saving the operating energy consumption of the push plate furnace 1. Of course, after the gravity string 5 falls, an additional retreat force F02 provided by the power drive system is required to return the push plate furnace 1 to the starting position.

[0097] The traction mechanism includes fixed pulleys 301 arranged at the top and bottom of the suspension frame 3, and the traction rope 4 passes through the fixed pulleys 301 at the top and bottom of the suspension frame 3, and the rear section hangs downward, and its rear end is connected to the gravity body 501 at the front end of the gravity string 5, and the front section extends horizontally to the sliding line of the push plate furnace 1, and its front end can be connected with the push plate furnace 1 when the push plate furnace 1 reaches the set sliding speed. In this way, the gravity when the gravity string 5 rises upward is converted into a reverse force F01 along the sliding direction of the push plate furnace 1.

[0098] Further, two parallel hook-shaped gravity rails 6 are arranged at the rear of the suspension frame 3. The hook-shaped gravity rail 6 is arranged to have an upper upright section 601 and a lower U-shaped section 602. The front section and the rear section of the U-shaped section 602 are arranged to have a front steep slope section 6021 and a rear steep slope section 6022, respectively. The bottom connecting section between the front steep slope section 6021 and the rear steep slope section 6022 is a bottom arc section 6023. The upper end of the front steep slope section 6021 is connected to the lower end of the upright section 601. Running wheels 502 running on the hook-shaped gravity rail 6 are respectively arranged on both sides of the weight string 5, and the weight string 5 is placed in the U-shaped section 602 of the hook-shaped gravity rail 6. When the traction rope 4 does not apply an upward traction force, the multiple weight bodies 501 at the front, middle and rear of the weight string 5 naturally stay at the front steep slope section 6021, the bottom arc section 6023 and the rear steep slope section 6022 of the U-shaped section 602 by gravity balance. When the traction rope 4 applies an upward traction force, the weight string 5 loses its gravity balance and begins to rise along the front steep slope section 6021 and the upright section. The gravity balance here means that the gravity of all the weight bodies 501 of the weight string 5 in the front steep slope section 6021 is balanced with the gravity of all the weight bodies 501 located in the rear steep slope section 6022. In this case, the front end only needs to apply a small lifting force of the traction rope 4 to break this balance, so that the entire gravity string 5 starts to move forward, and the gravity body at the front end can start to rise upward, because the downward gravity of all gravity bodies 501 on the rear steep slope section 6022 can be used as a booster. The advantage of this setting is that when the push plate furnace 1 is at the maximum sliding speed, the initial reverse force F01 obtained can be very small, and the stop height of the front end of the gravity string 5 can be further controlled by the traction rope 4 to adjust the initial reverse force F01 of appropriate size when the push plate furnace 1 is at the maximum sliding speed. In addition, the setting of the bottom arc section 6023 makes the subsequent gravity body 501 join the rising process a gradual process, and the increase of the lifting force of the upper traction rope 4 is also a gradual increase process without a sense of step, that is, the increase of the reverse force F01 applied to the push plate furnace 1 is also a gradual increase process without a sense of step, which is reflected in the deceleration of the push plate furnace 1. There is no sense of frustration, and the stability of the inertial force F1 obtained by the material box 9 can be maintained.

[0099] Reverse rail surfaces 603 are provided on the outer sides of the two hook-shaped gravity rails 6 , and limiting wheels 503 running on the reverse rail surfaces 603 are provided under the running wheels 502 on both sides of the gravity body 501 , so as to limit the gravity string 5 on the two hook-shaped gravity rails 6 .

[0100] As an option, the U-shaped section 602 of the hook-shaped gravity rail 6 can be arranged below the ground, and the upright section 601 can be arranged above the ground, see Figure 8 .

[0101] like Fig.12 As shown, the gravity body 501 includes a frame 5011 and a counterweight 5012 fixed in the frame 5011. The weight of each gravity body 501 is determined by the volume and / or number of the counterweight 5012. In this way, the weight of the gravity body 501 can be easily adjusted by adding or removing counterweights of different sizes.

[0102] like Fig. 9 , 10As shown in Figures 13, 14, 15, 16 and 17, a connecting mechanism 7 between the traction rope 4 and the push plate furnace 1 is arranged between the bottom of the middle and rear section of the push plate furnace 1 and the two rails 10, and the connecting mechanism 7 is provided with: a pull rod 701, a hanging cake 7011 fixed at the front end of the pull rod 701, a stabilizing support wing 7012 fixed at the bottom of the pull rod 701 and arranged along the length direction of the pull rod 701, a section of a pull rod support body 702 fixed to the ground, a slide groove 7021 arranged at the top of the pull rod support body 702 for accommodating and limiting the stabilizing support wing 7012, and a blocker 701 fixed at the rear end of the bottom of the push plate furnace 1. 3. A blocking plate 704 is arranged at the front end of the blocker 703, a buffer spring 706 is arranged between the blocking plate 704 and the blocker 703, a longitudinal slide groove 2 705 is arranged at the bottom of the blocker 703 and the blocking plate 704, the stabilizing support wing 7012 of the pull rod 701 is placed in the slide groove 1 7021 at the top of the pull rod support body, the pull rod 701 is placed in the slide groove 2 705 at the bottom of the blocker 703 and the blocking plate 704, and before the push plate furnace 1 starts to accelerate, the distance from the blocking plate 704 to the hanging cake 7011 at the front end of the pull rod 701 is set to be equal to the distance when the push plate furnace 1 starts to accelerate to reach the set speed. When the push plate furnace 1 starts to accelerate and slide from a stationary state, since the pull rod 701 is controlled by the gravity string 5 through the traction rope 4 to maintain a stationary state, the blocker 703 and the blocking plate 704 at the front end slide forward on the pull rod 701 through the chute 2 705 with the push plate furnace 1. When the push plate furnace 1 accelerates to the set speed, the blocking plate 704 at the front end of the blocker 703 just hangs on the hanging cake 7011 at the front end of the pull rod 701, and the pull rod 701 immediately follows the push plate furnace 1 to move forward. When the pull rod 701 moves forward, its stable support wing 7012 slides in the chute 1 7021 of the pull rod support body 702 and supports the rear section of the pull rod 701. During the forward movement of the pull rod 701, the gravity string 5 is continuously lifted upward through the traction rope, so that the push plate furnace 1 obtains a continuously increasing reverse force F01. When the push plate furnace 1 stops under the action of the reverse force F01, the push plate furnace 1 immediately starts to retreat to the starting position under the combined action of the reverse force F01 and the external retraction force F02 (provided by the power drive system). In this process, the gravity string 5 first returns to the U-shaped section 602 of the hook-shaped gravity rail 6, and the pull rod 701 stops retreating after losing the backward pulling force. Under the action of the external retraction force F02, the push plate furnace 1 continues to retreat backward, and the blocker 703 and the front blocking plate 704 slide backward on the pull rod 701 through the second slide groove 705 with the push plate furnace 1 until the push plate furnace 1 stops retreating.

[0103] like Fig.17 , 18As shown, the buffer spring 706 is arranged between the blocking plate 704 and the blocker 703, and the buffer holes 7031 are respectively arranged on both sides of the second slide slot 705 at the front end of the blocker 703, and there are two buffer springs 706, which are respectively installed in the two buffer holes 7031, and guide pressure rods 7041 are respectively arranged on both sides of the second slide slot 705 at the rear side of the blocking plate 704, and the two guide pressure rods 7041 are respectively inserted into the two buffer holes 7031 and press the front end of the buffer spring 706. When the blocking plate 704 contacts the hanging cake 7011 and is subjected to the impact force of the hanging cake 7011, the buffer spring 706 buffers the impact force.

[0104] like Fig.13 As shown in FIG. 17 , a tubular stop sleeve 707 is provided at the connection portion between the pull rod 701 and the traction rope 4. The front end of the traction rope 4 and the rear end of the pull rod 701 are both fixed in the tube hole of the stop sleeve 707. The annular rear end surface of the stop sleeve 707 outside the traction rope 4 is a stop surface 7071. A stop baffle 708 is provided on the pull rod support body 702 behind the slide groove 7021. A sliding groove is provided on the stop baffle 708 for the traction rope 4 to slide through. Groove three 709, the front side of the stop baffle 708 is located on the outer periphery of the slide groove three 709 as the stop surface two 7081 which can fit with the stop surface one 7071 to prevent the traction rope 4 from retreating. The fixed position of the stop baffle 708 on the pull rod support body 702 can be adjusted forward and backward, which is used to adjust the height of the front end of the gravity string 5 on the front steep slope section 6021, and then adjust the size of the initial reverse force F01, thereby realizing the adjustment of the initial reverse force F01 as described above.

[0105] like Fig.19 , 20 As shown, in order to ensure the setting of the connecting mechanism 7, the sliding wheels 105 on both sides of the bottom of the middle and rear sections of the push plate furnace 1 are installed with separate support plates 106, and the sliding wheels 105 at the front section of the push plate furnace 1 are installed with a wheelset similar to that of a train, and a wheelset shaft 108 is used between the left and right pulleys. The driving motor 107 in the power drive system can directly establish a transmission relationship with the wheelset shaft 108.

[0106] It should be made clear here that the pull rod 701 and its stabilizing support wing 7012 extend forward from approximately below the rear end of the push plate furnace 1 at the starting point to below the middle of the push plate furnace 1, while the pull rod support body 702 extends further forward to below the front of the push plate furnace 1 close to the position of the wheelset axle 108.

[0107] At this point it is clear that when the push-plate furnace 1 is located at the starting point, the distance from the blocking plate 704 below its rear end to the hanging cake 7011 at the front end of the pull rod 701 is the sliding distance of the push-plate furnace 1 from accelerating at the start to reaching the set speed and about to obtain the reverse force F01; and the height to which the front end of the gravity string 5 rises on the hook-shaped gravity rail 6 is the distance from when the push-plate furnace 1 decelerates to stop after reaching the set speed and obtaining the reverse force F01.

[0108] Embodiment 2 is a further improvement of embodiment 1.

[0109] like Fig.21 , 22 As shown, a feeding table 101 which can communicate with the preheating section 201 is arranged behind the preheating section 201 of the push plate furnace 1, and a front furnace door 103 is located between the preheating section 201 and the feeding table 101, and a marshalling table 8 which is laterally adjacent to the feeding table 101 is arranged outside the track 10 beside the feeding table 101, a row push plate 17 is arranged beside the marshalling table 8, and a single push plate 15 is arranged behind the marshalling table 8, and a main push plate 13 is located behind the feeding table 101, and the main push plate 13 is also provided with a feeding pushing stroke.

[0110] According to the above arrangement, the push plate furnace discharging method also includes a push plate furnace feeding method, and the push plate furnace feeding method includes the following steps:

[0111] Step 1: When the push plate furnace 1 has finished unloading a group of material boxes 9, a material box 9 is placed at the rear of the marshaling platform 8, and the single push plate 15 pushes the material box 9 to the front of the marshaling platform 8, and the above operation is repeated several times until a group of material boxes 9 are fully arranged on the marshaling platform 8;

[0112] Step 2: The push plate 17 pushes a group of full material boxes 9 on the marshaling platform 8 horizontally to the feeding platform 101;

[0113] Step 3: Open the front furnace door 103;

[0114] Step 4: The main push plate 13 performs a feeding push stroke to push a group of material boxes 9 on the marshaling platform 8 longitudinally into a group section that is vacant at the rear end of the preheating section 201 after step S5 is completed;

[0115] Step 5: The main push plate 13 exits the preheating section 201 and the front furnace door 103 is closed.

[0116] The above-mentioned push plate 17 and single push plate 15 are pushed by the push electric cylinder 16 and single push electric cylinder 14 respectively through the push rod 11.

[0117] The above step 1 can be completed when the push plate furnace 1 slides away from the starting position and is in the discharging stage, or it can be completed when the discharging is completed and the furnace returns to the starting position.

[0118] The setting position of the marshaling platform 8 is a position that is horizontally parallel to the feeding platform 101 when the push plate furnace 1 is located at the starting position.

[0119] It is clear that the push plate furnace 1 includes not only the section where the furnace tube 2 is located, but also the section where the feeding platform 101 and the main electric cylinder 12 are located at the back, and the section where the temporary storage platform 102 is located at the front, but does not include the marshaling platform 8 and its related settings, see Figure 1 .

[0120] Embodiment three, as Fig.23 shown.

[0121] The difference between the embodiment 1 and the embodiment 1 is that, during the execution of step S3, the push plate furnace 1 stops sliding forward under the action of the reverse force F01, and immediately starts to return under the action of the reverse force F01 or under the combined action of the reverse force F01 and the external retraction force F02, and steps S4 and S5 are completed during the return of the push plate furnace 1. The advantage of this arrangement is that the material box 9 continues to maintain the inertia force F1 during the process of the push plate furnace 1 immediately retracting after stopping, and continues to use the inertia force F1 as the main thrust to complete the latter part of the process of discharging a group of material boxes 9, which can shorten the sliding stroke of the push plate furnace 1.

[0122] Embodiment 4, as Fig.24 shown.

[0123] The difference between it and the above-mentioned embodiment is that the reverse force F01 is obtained by compressing or stretching the strong spring 18, and its advantage is that the structure is greatly simplified. However, since the reverse force F01 increases in direct proportion and cannot be controlled, the sliding distance of the push plate furnace 1 is short, the discharging time is short, and the discharging speed is too fast. The blanks that have not been fully hardened in the preheating section 201 can hardly withstand too much stopping force. Therefore, this embodiment is only suitable for sintering simple and bulky workpieces.

[0124] The above implementation methods are limited to explaining the present invention. Without departing from the principle of the present invention, several improvements or modifications made by others should be deemed to fall within the protection scope of the present invention.

Claims

1. A method for discharging materials from a push plate furnace using inertial force as the main thrust, characterized in that: The push plate furnace (1) is placed on two parallel rails (10), and a reverse force F01 opposite to the discharge direction is applied to the push plate furnace (1) to make the push plate furnace (1) perform negative acceleration motion relative to the discharge direction, so that all the material boxes (9) arranged longitudinally close to each other on the pushing slide rail (204) in the furnace tube (2) form a forward inertia force F1, and a main push plate (13) is arranged behind the furnace tube (2), with the inertia force F1 as the main thrust, and the forward thrust F2 applied by the main push plate (13) to the longitudinally close material boxes (9) as the auxiliary thrust to push all the material boxes (9) arranged front and back in the entire furnace tube (2) to slide forward, and the main push plate (13) is provided with a discharge pushing stroke, and a group of material boxes (9) located at the front section of the furnace tube is pushed out of the furnace tube (2) by a discharge pushing stroke of the main push plate (13); The inertia force F1 plus the forward thrust F2 is greater than the static friction between the material box (9) and the pushing slide rail (204), but the inertia force F1 and the forward thrust F2 are both smaller than the static friction between the material box (9) and the pushing slide rail (204).

2. The method for discharging materials from a push plate furnace using inertia force as the main thrust according to claim 1, characterized in that: The furnace tube (2) is equally divided into a plurality of groups (205), the preheating section (201), the high temperature section (202) and the cooling section (203) of the furnace tube (2) each having an integer number of groups (205), each group (205) being able to arrange a group of equal number of material boxes (9) in a front-to-back arrangement, and the distance of a discharge pushing stroke of the main push plate (13) is equal to the length of a group (205).

3. The method for discharging materials from a push plate furnace using inertia force as the main thrust according to claim 2, characterized in that: The push plate furnace (1) moves out and returns once to complete the unloading of a group of material boxes (9). The unloading of a group of material boxes (9) includes the following steps: S1, the push plate furnace (1) is in a stationary state, the front furnace door (103) is opened, and the front end of the main push plate (13) is pre-pressed against the rear end of the last material box (9) in the last group of material boxes (9) that have completed preliminary preheating in the furnace tube preheating section (201); S2, starting the push plate furnace (1) from a stationary state and accelerating it to slide forward; S3, the push plate furnace (1) slides forward to reach the set speed, the rear furnace door (104) of the furnace tube (2) opens, and a reverse force F01 is continuously applied to the push plate furnace (1) to form a negative acceleration, so that all the material boxes (9) in the furnace tube (2) obtain an inertial force F1. At the same time, the push rod (11) applies a forward thrust F2, so that all the material boxes (9) in the furnace tube (2) slide forward, and the front group of material boxes (9) in the cooling section (203) of the furnace tube (2) begins to be pushed out of the front end of the furnace tube (2); S4, the main push plate (13) completes a material discharging and pushing stroke, and the first group of material boxes (9) in the furnace tube (2) are all pushed out of the furnace tube (2); S5, the main push plate (13) retracts, the front furnace door (103) and the rear furnace door (104) are closed, and the last group section in the preheating section (201) is vacant.

4. The method for discharging materials from a push plate furnace using inertia force as the main thrust according to claim 3, characterized in that: In step S3, the reverse force F01 continuously increases as the push plate furnace (1) slides forward, but the increase in the continuously increasing reverse force F01 gradually decreases.

5. The method for discharging materials from a push plate furnace using inertia force as the main thrust according to claim 4, characterized in that: A suspension frame (3) and a gravity string (5) formed by connecting a plurality of gravity bodies (501) in a hinged manner are arranged at the rear of the push plate furnace (1). The weight of the rear gravity body (501) is less than the weight of the front gravity body (501). A traction mechanism having a traction rope (4) is arranged between the push plate furnace (1) and the gravity string (5). The sliding kinetic energy of the push plate furnace (1) reaching a set sliding speed is used to sequentially lift the gravity bodies (501) of the gravity string (5) from front to back on the suspension frame (3) through the traction rope (4). At the same time, the gravity of the gravity bodies (501) that are continuously lifted upward is converted through the traction mechanism into a reverse force F01 that acts on the push plate furnace (1) and continuously increases, but the increase is initially reduced.

6. The method for discharging materials from a push plate furnace using inertia force as the main thrust according to claim 5, characterized in that: The traction mechanism comprises fixed pulleys (301) arranged at the top and bottom of the suspension frame (3); the traction rope (4) passes over the fixed pulleys (301) at the top and bottom of the suspension frame (3); the rear section of the traction rope (4) hangs downward; the rear section of the traction rope (4) is connected to the gravity body (501) at the front end of the gravity string (5); the front section of the traction rope (4) extends horizontally to the sliding line of the push plate furnace (1); the front section of the traction rope (4) can be connected to the push plate furnace (1) when the push plate furnace (1) reaches a set sliding speed.

7. The method for discharging materials from a push plate furnace using inertia force as the main thrust according to claim 6, characterized in that: Two hook-shaped gravity rails (6) parallel to each other and shaped like fishhooks when viewed from the side are arranged at the rear of the suspension frame (3); the hook-shaped gravity rail (6) is arranged as an upper upright section (601) and a lower U-shaped section (602); the front section and the rear section of the U-shaped section (602) are respectively arranged as a front steep slope section (6021) and a rear steep slope section (6022); the bottom connecting section between the front steep slope section (6021) and the rear steep slope section (6022) is a bottom arc section (6023); the upper end of the front steep slope section (6021) is connected to the lower end of the upright section (601); and the two bottom sections of each gravity body (501) of the gravity string (5) are connected to each other. Running wheels (502) running on the hook-shaped gravity rail (6) are respectively arranged on the sides, and the gravity string (5) is placed on the U-shaped section (602) of the hook-shaped gravity rail (6). When the traction rope (4) does not apply an upward traction force, the multiple gravity bodies (501) at the front, middle and rear parts of the gravity string (5) naturally stay at the front steep slope section (6021), the bottom arc section (6023) and the rear steep slope section (6022) of the U-shaped section (602) by gravity balance. When the traction rope (4) applies an upward traction force, the gravity string (5) loses its gravity balance and starts to rise upward along the front steep slope section (6021) and the upright section.

8. The method for discharging materials from a push plate furnace using inertia force as the main thrust according to claim 7, characterized in that: Reverse rail surfaces (603) are arranged on the outer sides of the two hook-shaped gravity rails (6), and limiting wheels (503) that run on the reverse rail surfaces (603) are arranged under the running wheels (502) on both sides of the gravity body (501) to limit the gravity string (5) on the two hook-shaped gravity rails (6).

9. The method for discharging materials from a push plate furnace using inertia force as the main thrust according to claim 5, characterized in that: Assume that the gravity body (501) includes a frame (5011) and a counterweight block (5012) fixed in the frame (5011), and the weight of each gravity body (501) is determined by the volume and / or number of the counterweight blocks (5012).

10. The method for discharging materials from a push plate furnace using inertia force as the main thrust according to claim 6, characterized in that: A connecting mechanism (7) between the traction rope (4) and the push plate furnace (1) is provided between the bottom of the middle and rear section of the push plate furnace (1) and the two rails (10). The connecting mechanism (7) is provided with: a pull rod (701), a hanging cake (7011) fixed at the front end of the pull rod (701), a stabilizing support wing (7012) fixed at the bottom of the pull rod (701) and arranged along the length direction of the pull rod (701), a pull rod support body (702) fixed to the ground, a slide groove (7021) provided at the top of the pull rod support body (702) for accommodating and limiting the stabilizing support wing (7012), and a blocker (703) fixed at the rear end of the bottom of the push plate furnace (1). A blocking plate (704) is provided at the front end, a buffer spring (706) is provided between the blocking plate (704) and the blocker (703), a longitudinal slide groove 2 (705) is provided at the bottom of the blocker (703) and the blocking plate (704), the stabilizing support wing (7012) of the pull rod (701) is placed in the slide groove 1 (7021) at the top of the pull rod support body, the pull rod (701) is placed in the slide groove 2 (705) at the bottom of the blocker (703) and the blocking plate (704), and before the push plate furnace (1) starts to accelerate, the distance from the blocking plate (704) to the hanging cake (7011) at the front end of the pull rod (701) is set to be equal to the distance when the push plate furnace (1) starts to accelerate to reach the set speed.

11. The method for discharging materials from a push plate furnace using inertia force as the main thrust according to claim 6, characterized in that: A tubular stop sleeve (707) is provided at the connection portion between the pull rod (701) and the traction rope (4); the front end of the traction rope (4) and the rear end of the pull rod (701) are both fixed in the tube hole of the stop sleeve (707); the annular rear end surface of the stop sleeve (707) outside the traction rope (4) is a stop surface 1 (7071); a stop baffle (708) is provided on the pull rod support body (702) behind the slide groove 1 (7021); The slide groove three (709) is only for the traction rope (4) to slide through, and the front side of the backstop baffle (708) is located on the outer periphery of the slide groove three (709) and is a backstop surface two (7081) that can fit with the backstop surface one (7071) to prevent the traction rope (4) from retreating. The fixed position of the backstop baffle (708) on the pull rod support body (702) can be adjusted forward and backward to adjust the height of the front end of the gravity string (5) on the front steep slope section (6021), thereby adjusting the size of the initial reverse force F01.

12. The method for discharging materials from a push plate furnace using inertia force as the main thrust according to claim 3, characterized in that: After step S4 is completed, the push plate furnace (1) stops sliding forward under the action of the reverse force F01, and immediately starts to return under the action of the reverse force F01 or under the combined action of the reverse force F01 and the external retracting force F02, and step S5 is completed on the way back.

13. The method for discharging materials from a push plate furnace using inertia force as the main thrust according to claim 3, characterized in that: During the execution of step S3, the push plate furnace (1) stops sliding forward under the action of the reverse force F01, and immediately starts to return under the action of the reverse force F01 or under the combined action of the reverse force F01 and the external retracting force F02, and the subsequent process of step S3 and steps S4 and S5 are completed on the way back.

14. The method for discharging materials from a push plate furnace using inertia force as the main thrust according to claim 3, characterized in that: A feeding platform (101) capable of communicating with the preheating section (201) is arranged behind the preheating section (201) of the push plate furnace (1), a front furnace door (103) is located between the preheating section (201) and the feeding platform (101), a marshaling platform (8) is arranged outside the track (10) next to the feeding platform (101) and is laterally adjacent to the feeding platform (101), a row push plate (17) is arranged beside the marshaling platform (8), a single push plate (15) is arranged behind the marshaling platform (8), the main push plate (13) is located behind the feeding platform (101), and the main push plate (13) is arranged to have a feeding pushing stroke, the push plate furnace discharging method includes a feeding method of the push plate furnace, and the feeding method of the push plate furnace includes the following steps: Step 1: When the push plate furnace (1) completes the process of unloading a group of material boxes (9), a material box (9) is placed at the rear of the marshalling table (8), and the material box (9) is pushed to the front of the marshalling table (8) by a single push plate (15), and this operation is repeated several times until a group of material boxes (9) is fully arranged on the marshalling table (8); Step 2: A group of material boxes (9) that are fully stacked on the marshaling table (8) are pushed horizontally to the feeding table (101) by a push plate (17); Step 3: Open the front furnace door (103); Step 4: The main push plate (13) performs a feeding push stroke to push a group of material boxes (9) on the marshaling table (8) longitudinally into a group section that is vacant at the rear end of the preheating section (201) after step S5 is completed; Step 5: The main push plate (13) exits the preheating section (201) and the front furnace door (103) is closed.

Images