A reverse force application system for a pusher furnace and a pusher furnace

Abstract

The present invention discloses a reverse force application system for a pusher furnace and a pusher furnace, belonging to the technical field of sintering furnaces. The force application system includes a suspension bracket arranged behind the pusher furnace, a gravity string formed by connecting multiple gravity bodies in an articulated manner, a traction mechanism with a traction cable, and a coupling mechanism capable of connecting the traction cable to the pusher furnace. The rear end of the traction cable is connected to the front end of the gravity string, and the rear end can be coupled to the forward-sliding pusher furnace through the coupling mechanism. When the traction cable is coupled to the forward-sliding pusher furnace through the coupling mechanism, the traction cable can lift and raise each gravity body of the gravity string from front to back on the suspension bracket, so that the forward-sliding pusher furnace continuously receives an increasing reverse force F01. The pusher furnace is provided with the above force application system. The pusher furnace has sliding wheels and a sliding track, and can receive the reverse force F01 applied by the above force application system during sliding, so that the material box therein obtains an inertial force to be pushed out of the furnace.

Description

Technical Field

[0001] The invention relates to a reverse force application system applied to a push plate furnace and the push plate furnace, belonging to the technical field of sintering furnace discharging. 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 dewaxing 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] In order to solve the above problems, our company has developed a push-plate furnace unloading method that uses inertia force F1 as the main thrust to unload the material box from the furnace (a patent application was filed on the same day as this application). The basic principle is to make the push-plate furnace slide, apply a reverse force opposite to the unloading direction to the push-plate furnace and form a negative acceleration motion, so that each material box simultaneously obtains the inertia force F1 along the unloading direction, thereby greatly reducing the squeezing force between the material boxes, and thus greatly increasing the furnace capacity, and improving the continuous unloading method of a single material box, reducing the opening frequency of the front and rear furnace doors, and thus reducing heat energy loss.

[0008] The method for discharging materials from a push plate furnace involves forming a reverse force and causing it to act on the push plate furnace, and its basic requirement is to enable the material box in the furnace tube to obtain a continuous and stable inertial force F1. Summary of the invention

[0009] The technical problem to be solved by the present invention is: how to form a reverse force and make the reverse force act on the push plate furnace, so that the push plate furnace performs negative acceleration motion, thereby making the material box in the furnace tube obtain a continuous and relatively stable inertial force F1.

[0010] In view of the above problems, the technical solution proposed by the present invention is:

[0011] A reverse force system applied to a push plate furnace comprises a suspension frame arranged at the rear of the push plate furnace, a gravity string formed by a plurality of gravity bodies connected in series in an articulated manner, a traction mechanism having a traction rope, and a connecting mechanism capable of connecting the traction rope and the push plate furnace, wherein the rear end of the traction rope is connected to the front end of the gravity string, and the front end can be connected to the push plate furnace sliding forward through the connecting mechanism. When the traction rope is connected to the push plate furnace sliding forward through the connecting mechanism, the traction rope can sequentially lift and elevate the gravity bodies of the gravity string from front to back on the suspension frame, so that the push plate furnace sliding forward is continuously subjected to an increasing reverse force F01.

[0012] The traction mechanism also includes a fixed pulley 1 arranged at the top of the suspension frame and a fixed pulley 2 arranged at the bottom of the suspension frame. The traction rope passes around the fixed pulley 1 at the top of the suspension frame and the fixed pulley 2 at the bottom, and the rear section hangs downward, with its rear end connected to the gravity body at the front end of the gravity string, and the front end extends horizontally forward to connect with the hanging mechanism.

[0013] The weight of the rear gravity body is less than the weight of the front gravity body.

[0014] Two parallel hook-shaped gravity rails in the shape of fish hooks when viewed from the side are arranged at the rear of the suspension frame. The hook-shaped gravity rail comprises an upper upright section and a lower U-shaped section. The front section and the rear section of the U-shaped section are respectively a front steep slope section and a rear steep slope section. The bottom connecting section between the front steep slope section and the rear steep slope section is a bottom arc section. 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 respectively arranged on both sides of the bottom of each gravity body of the gravity string. 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.

[0015] The gravity body comprises a frame and a counterweight block fixed in the frame, and the weight of each gravity body is determined by the volume and / or quantity of the counterweight block.

[0016] The frame includes a bottom plate, a front end plate, a rear end plate and a connecting plate, the front end plate and the rear end plate are respectively fixed at the front end and the rear end of the bottom plate, the connecting plate is longitudinally fixed between the front end plate and the rear end plate, two counterweight spaces for loading counterweight blocks are formed between the front end plate and the rear end plate on both sides of the connecting plate, corresponding screw holes are set on the connecting plate and the counterweight blocks, and when loading the counterweight blocks, counterweight blocks of the same weight are loaded in the two counterweight spaces at the same time, and a screw with an external thread is used to penetrate the counterweight blocks on both sides and the screw holes on the connecting plate, and nuts are fastened at both ends of the screw so that the counterweight blocks on both sides are constrained on the connecting plate.

[0017] A connecting mechanism between the traction rope and the push plate furnace is arranged at the bottom of the middle and rear section of the push plate furnace, and the connecting mechanism includes: 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 arranged 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 arranged at the front end of the blocker, and a longitudinal slide groove 2 is arranged at the bottom of the blocker and the blocker plate. The stabilizing support wing of the pull rod is located in the slide groove 1 at the top of the pull rod support body and can slide back and forth in the slide groove 1, and the pull rod is located in the slide groove 2 at the bottom of the blocker and the blocker plate. 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.

[0018] A tubular stop sleeve is provided at the connection part of the pull rod and the traction rope, and 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. 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 for only the traction rope to slide through. The fixed position of the stop baffle on the pull rod support body can be adjusted forward and backward, and 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.

[0019] A push-plate furnace with a reverse force application system comprises a furnace tube, an electric heating body arranged on the outer periphery of the furnace tube, and an insulating layer arranged between the electric heating body and the furnace shell. A longitudinal pushing slide rail is arranged in the furnace tube, and a push rod is arranged at the rear of the furnace tube, which can penetrate into the furnace tube to a certain depth and push the material box in the furnace tube forward. The improvement lies in: it also includes a driving motor and sliding wheels running on the rails arranged on both sides of the bottom of the push-plate furnace, the sliding wheels located on the middle and rear sides of the push-plate furnace are respectively fixed on support plates arranged on both sides of the bottom of the push-plate furnace, and the sliding wheels located on both sides of the front of the push-plate furnace are installed at the bottom of the push-plate furnace in the form of a wheel pair, and a wheel pair shaft with two ends fixedly connected to the two sliding wheels is provided between the two corresponding sliding wheels on the left and right. The driving motor establishes a driving relationship with the wheel pair shaft, and the push-plate furnace can slide on the track by driving the wheel pair shaft and its sliding wheels to rotate.

[0020] The above-mentioned push-plate furnace also includes a temporary storage platform located in front of the furnace tube for temporarily storing the pushed-out material boxes during the sliding process of the push-plate furnace, and a feeding platform located behind the furnace tube for placing the grouped material boxes. The main electric cylinder for pushing the push rod is located behind the feeding platform.

[0021] Beneficial effects: The force application system of the present invention can provide a continuous reverse force F01 for the moving push plate furnace. The reverse force F01 increases continuously as required and the increase gradually decreases. The increase of the reverse force F01 is a smooth increase without any sense of frustration. It can automatically connect and disconnect with the push plate furnace at the set time; the raised gravity string not only provides the reverse force F01 for the forward movement of the push plate furnace, but also reserves energy for the retreat of the push plate furnace in the form of gravitational potential energy. The push plate furnace of the present invention can make all the material boxes arranged longitudinally in the push plate furnace obtain the inertia force F1 along the discharge direction at the same time in a way that the forward movement is blocked. With the inertia force F1 as the main thrust and supplemented by the thrust of the push rod, the pushing force of the material box on the push rod in the traditional furnace discharge method can be reduced by more than 90%, thereby increasing the content of the push plate furnace several times and extending the service life of the material box. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional schematic diagram of the push plate furnace and the suspension frame, etc., in which the U-shaped section of the hook-shaped gravity rail indicated by 502 is located below the ground;

[0023] Figure 2The figure is a schematic side view of the push plate furnace and the suspension frame, etc., in which the track is hidden;

[0024] Figure 3 The figure is a schematic diagram of the traction mechanism, the connecting mechanism and the hook-shaped gravity rail, and also shows that the gravity string lifted by the traction rope forms a reaction force F01 on the push plate furnace, and the push plate furnace and the rail are hidden in the figure;

[0025] Figure 4 The figure is a schematic side view of the gravity string naturally staying on the U-shaped section of the hook-shaped gravity rail. 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;

[0026] Figure 5 is a three-dimensional schematic diagram of the gravity body;

[0027] Figure 6 is a three-dimensional schematic diagram of the frame of the gravity body;

[0028] Figure 7 for Figure 1 A partial schematic diagram showing the positional relationship and structure of the rear of the push plate furnace and the suspension frame;

[0029] Figure 8 is a three-dimensional schematic diagram of the connection portion between the traction rope and the connecting mechanism;

[0030] Fig. 9 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;

[0031] Fig.10 is a three-dimensional schematic diagram of the rear end of the pull rod support body;

[0032] Fig.11 It is a three-dimensional schematic diagram of the rear end of the push plate furnace;

[0033] Fig.12 is a three-dimensional schematic diagram of the structural relationship between the blocker and the pull rod, etc.;

[0034] Fig.13 A schematic diagram of the disassembly of the blocker, buffer spring, blocker plate, etc.;

[0035] Fig.14 It is a schematic side view of a push plate furnace with a reverse force application system. In the figure, the push plate furnace is sliding forward and is subjected to a reverse force F01 from the reverse force application system through a traction rope. Arrow A in the figure indicates the forward direction of the push plate furnace. F1 is the inertial force obtained by the material box in the furnace tube, and F2 is the forward thrust applied by the push rod to the material box. The figure shows that the material box at the front end of the furnace tube begins to be pushed out to the temporary storage platform under the joint action of F1 and F2.

[0036] Fig.15 It is a three-dimensional schematic diagram of the blocker and its blocking plate in the reverse force application system approaching the hanging cake, 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;

[0037] Fig.16 It is a three-dimensional schematic diagram of the front end of the pull rod support body in the reverse force application system extending to the bottom of the 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;

[0038] Fig.17 is a schematic side view of the material box;

[0039] Fig.18 It is a schematic side view of a push plate furnace in the prior art.

[0040] In the figure: 100, push plate furnace; 1, furnace tube; 2, suspension frame; 201, fixed pulley 1; 202, fixed pulley 2; 3, traction rope; 4, gravity string; 400, gravity body; 401, frame; 4011, bottom plate; 4012, front end plate; 4013, rear end plate; 4014, connecting plate; 4015, counterweight space; 4016, screw rod hole; 4017, screw rod; 402, counterweight block; 403, running wheel; 404, limit wheel; 405, hinged rod; 5, hook-shaped gravity rail; 501, upright section; 502, U-shaped section; 5021, front steep slope section; 5022, bottom arc section; 5023, rear steep slope section; 503, reverse rail Surface; 6, connecting mechanism; 601, pull rod; 6011, hanging cake; 6012, stabilizing support wing; 602, pull rod support body; 6021, slide slot one; 6022, positioning bolt hole; 6023, bolt; 603, blocker; 6031, buffer hole; 604, blocker plate; 6041, guide pressure rod; 605, slide slot two; 606, buffer spring; 607, stop sleeve; 608, stop baffle; 6082, slide slot three; 6081, buffer rubber layer; 7, material box; 8, track; 9, push rod; 10, drive motor; 11, sliding wheel; 12, support plate; 13, wheel pair shaft; 14, temporary storage platform; 15, feeding platform. DETAILED DESCRIPTION

[0041] 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.

[0042] like Fig.17 , 18As shown, the push plate furnace 100 adopts a tubular furnace structure, and the total length is generally 15-25 meters. It has a furnace tube 1 that can be connected from front to back, and a longitudinal push slide rail is arranged in the furnace tube 1. The inner space of the furnace tube 1 has a preheating section at the rear, a high temperature section in the middle, and a cooling section at the front. The push slide rails of the preheating section and the cooling section are steel rails with low sliding resistance, and the high temperature section adopts a ceramic rail that is resistant to high temperature but has large sliding resistance. A front furnace door and a rear furnace door are respectively arranged at the front and rear ends of the furnace tube 1. A negative pressure device is arranged in the furnace tube 1 to collect the dewaxing gas overflowed from the hard alloy blank in the furnace tube 1 at high temperature. The setting of the front furnace door and the rear furnace door is mainly used to control the amount of external gas entering the furnace tube 1 under the negative pressure formed by the negative pressure device. An electric heating system is arranged on the outer wall of the furnace tube 1, and an insulating layer is arranged between the outer periphery of the furnace tube 1 and the furnace shell. A pushing device for pushing the material box 7 is also provided at the rear of the push plate furnace 100, which has a push rod 9 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 9. The push plate furnace 100 has a plurality of high temperature resistant material boxes 7 adapted to the diameter of the furnace tube 1. The material box 7 has a high temperature resistant ceramic bottom plate. According to the needs, there are layers in the material box, and the hard alloy blanks for sintering are filled in each layer of the material box. During sintering, the push plate provided on the push rod 9 acts on the ceramic bottom plate of the material box 7 to push the material boxes 7 one by one from the rear port of the furnace tube 1 into the furnace tube 1 in sequence. The material boxes 7 that enter the furnace tube 1 in sequence slide forward slowly on the pushing slide rail with the front and back of each other. When passing through the preheating section, the moisture of the hard alloy blank is gradually evaporated and the blank becomes hard. When passing through the high temperature section, the hard alloy blank completes high temperature sintering. When passing through the cooling section, it is cooled to form a hard alloy product.

[0043] The present invention will be further described below in conjunction with the accompanying drawings:

[0044] Embodiment 1:

[0045] like Figure 1 , 2 As shown in FIG. 3 , a reverse force application system applied to a push plate furnace comprises a suspension frame 2 arranged at the rear of the push plate furnace 100, a gravity string 4 formed by a plurality of gravity bodies 400 connected in series in an articulated manner through an articulated rod 405, a traction mechanism having a traction rope 3 and a hanging mechanism capable of connecting the traction rope 3 and the push plate furnace 100, the rear end of the traction rope 3 is connected to the front end of the gravity string 4, and the front end can be hung with the push plate furnace 100 sliding forward through the hanging mechanism. When the traction rope 3 is hung with the push plate furnace 100 sliding forward through the hanging mechanism, the traction rope 3 can sequentially lift and elevate the gravity bodies 400 of the gravity string 4 from front to back on the suspension frame 2, so that the push plate furnace 100 sliding forward and losing the forward driving force at this time is continuously subjected to a continuously increasing reverse force F01, and the push plate furnace 100 performs a negative acceleration motion, so that the material box 7 in the push plate furnace 100 can obtain a continuous and stable forward inertia force F1 when it is discharged forward (see FIG. 1 ). Fig.14 ).

[0046] The advantage of the above technical solution is that the number of gravity bodies 400 and the weight of each gravity body 400 can be set as needed, so that the change amount of the reverse force F01 can be adjusted as needed. In addition, when the push plate furnace 100 moves forward, the gravity string 4 is raised on the suspension frame 2, which actually converts most of the kinetic energy of the push plate furnace 100 when moving forward into the gravitational potential energy of the gravity string 4 when it rises, and when the push plate furnace 100 returns, the gravitational potential energy can be converted into the kinetic energy of the push plate furnace 100 retreating, thereby greatly saving the operating energy consumption of the push plate furnace 100.

[0047] like Figure 2 , 3 As shown in Figure 4, the traction mechanism also includes a fixed pulley 1 201 arranged at the top of the suspension frame 2 and a fixed pulley 2 202 arranged at the bottom of the suspension frame 2. The traction rope 3 passes over the fixed pulley 1 201 at the top of the suspension frame 2 and the fixed pulley 2 202 at the bottom. The rear section hangs downward, and its rear end is connected to the gravity body 400 at the front end of the gravity string 4. The front end extends horizontally forward to connect with the hanging mechanism. In order to make room for the rise of gravity, the top fixed pulley 1 201 is provided with two front and rear fixed pulleys. In this way, the direction of the force conducted by the traction rope 3 is changed by the setting of the fixed pulley 1 201 and the fixed pulley 2, and the gravity when the gravity string 4 rises upward is converted into a reverse force F01 along the sliding direction of the push plate furnace 100.

[0048] Furthermore, the weight of the rear gravity body 400 is less than the weight of the front gravity body 400, so that the gravity of the gravity body 400 that is continuously lifted upward is converted into a continuously increasing but gradually decreasing reverse force F01 acting on the push plate furnace 100 through the traction mechanism. The key function of this force is to continuously increase the reverse force F01 acting on the push plate furnace 100 to maintain the inertia force F1 obtained by the material box 7 in the push plate furnace 100 basically constant, and to ensure that the increase in the reverse force F01 is not too large, so as to extend the deceleration and sliding time of the push plate furnace 100 as much as possible, that is, to appropriately extend the time for the material box 7 to discharge the material, so as to ensure the discharge volume and discharge safety.

[0049] Two parallel hook-shaped gravity rails 5 are arranged at the rear of the suspension frame 2. The hook-shaped gravity rails 5 are shaped like fish hooks when viewed from the side. The hook-shaped gravity rails 5 include an upper upright section 501 and a lower U-shaped section 502. The front section and the rear section of the U-shaped section 502 are respectively a front steep slope section 5021 and a rear steep slope section 5023. The bottom connecting section between the front steep slope section 5021 and the rear steep slope section 5023 is a bottom arc section 5022. The upper end of the front steep slope section 5021 is connected to the lower end of the upright section 501. At the bottom of each gravity body 400 of the gravity string 4 Running wheels 403 running on the hook-shaped gravity rail 5 are respectively arranged on both sides, and the gravity string 4 is placed in the U-shaped section 502 of the hook-shaped gravity rail 5. When the traction rope 3 does not apply an upward traction force, the multiple gravity bodies 400 at the front, middle and rear of the gravity string 4 naturally stay at the front steep slope section 5021, the bottom arc section 5022 and the rear steep slope section 5023 of the U-shaped section 502 by gravity balance. When the traction rope 3 applies an upward traction force, the gravity string 4 loses its gravity balance and begins to rise along the front steep slope section 5021 and the upright section. The gravity balance here means that the gravity of all the gravity bodies 400 of the gravity string 4 in the front steep slope section 5021 is balanced with the gravity of all the gravity bodies 400 located in the rear steep slope section 5023. In this case, the front end only needs to apply a small lifting force of the traction rope 3 to break this balance, so that the entire gravity string 4 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 400 on the rear steep slope section 5023 can be used as a booster. The advantage of this setting is that when the push plate furnace 100 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 4 can be further controlled by the traction rope 3 to adjust the initial reverse force F01 of the push plate furnace 100 at the maximum sliding speed. In addition, the setting of the bottom arc section 5022 makes the subsequent gravity body 400 join the rising process a gradual process, and the increase of the lifting force of the upper traction rope 3 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 100 is also a gradual increase process without a sense of step, which is reflected in the deceleration of the push plate furnace 100. There is no sense of frustration, and the stability of the inertial force F1 obtained by the material box 7 can be maintained.

[0050] Reverse rail surfaces 503 are provided on the outer sides of the two hook-shaped gravity rails 5 , and limiting wheels 404 running on the reverse rail surfaces 503 are provided under the running wheels 403 on both sides of the gravity body 400 , so as to limit the gravity string 4 on the two hook-shaped gravity rails 5 .

[0051] As an option, the U-shaped section 502 of the hook-shaped gravity rail 5 can be arranged below the ground, and the upright section 501 can be arranged above the ground (see Figure 1 ).

[0052] like Figure 5 ,6 As shown, the gravity body 400 includes a frame 401 and a counterweight 402 fixed in the frame 401. The weight of each gravity body 400 is determined by the volume and / or number of the counterweight 402. The frame 401 includes a bottom plate 4011, a front end plate 4012, a rear end plate 4013 and a connecting plate 4014. The front end plate 4012 and the rear end plate 4013 are respectively fixed to the front end and the rear end of the bottom plate 4011. The connecting plate 4014 is longitudinally fixed between the front end plate 4012 and the rear end plate 4013. Two counterweight spaces 4015 for loading the counterweight 402 are formed between the front end plate 4012 and the rear end plate 4013 on both sides of the connecting plate 4014. The corresponding screw hole 4016, when loading the counterweight block 402, loads the counterweight blocks 402 of the same weight in the two counterweight spaces 4015 at the same time, and uses the screw rod 4017 with external thread to penetrate the counterweight blocks 402 on both sides and the screw rod hole 4016 on the connecting plate 4014, and the nuts are fastened at both ends of the screw rod 4017 to constrain the counterweight blocks 402 on both sides to be constrained on the connecting plate 4014. In this way, the weight of the gravity body 400 can be adjusted very conveniently by adding or removing counterweight blocks 402 of different sizes.

[0053] like Figure 2 , 3As shown in Figures 7, 8, 9, 10, 11 and 15, a connecting mechanism 6 between the traction rope 3 and the push plate furnace 100 is provided at the bottom of the middle and rear section of the push plate furnace 100, and the connecting mechanism 6 comprises: a pull rod 601, a hanging cake 6011 fixed at the front end of the pull rod 601, a stable support wing 6012 fixed at the bottom of the pull rod 601 and arranged along the length direction of the pull rod 601, a section of a pull rod support body 602 fixed to the ground, a slide groove 6021 provided at the top of the pull rod support body 602 for accommodating and limiting the stable support wing 6012, a blocker 603 fixed at the rear end of the bottom of the push plate furnace, and a blocking plate 604 provided at the front end of the blocker 603. A buffer spring 606 is provided between the blocking plate 604 and the blocker 603. A longitudinal chute 605 is provided at the bottom of the blocker 603 and the blocking plate 604, the stabilizing support wing 6012 of the pull rod 601 is located in the chute 6021 at the top of the pull rod support body and can slide forward and backward in the chute 6021, and the pull rod 601 is located in the chute 605 at the bottom of the blocker 603 and the blocking plate 604. Before the push plate furnace 100 starts to accelerate, the distance from the blocking plate 604 to the hanging cake 6011 at the front end of the pull rod 601 is equal to the distance from the push plate furnace 100 to the set speed when it starts to accelerate. When the push plate furnace 100 starts to accelerate and slide from a stationary state, since the pull rod 601 is controlled by the gravity string 4 through the traction rope 3 to maintain a stationary state, the blocker 603 and the blocking plate 604 at the front end slide forward on the pull rod 601 through the chute 2 605 with the push plate furnace 100. When the push plate furnace 100 accelerates to a set speed, the blocking plate 604 at the front end of the blocker 603 just hooks the hanging cake 6011 at the front end of the pull rod 601, and the pull rod 601 immediately follows the push plate furnace 100 to move forward. When the pull rod 601 moves forward, its stable support wing 6012 slides in the chute 1 6021 of the pull rod support body 602 and supports the rear section of the pull rod 601. During the forward movement of the pull rod 601, the gravity string 4 is continuously lifted upward through the traction rope, so that the push plate furnace 100 obtains a continuously increasing reverse force F01. When the push plate furnace 100 stops under the action of the reverse force F01, the push plate furnace 100 immediately starts to retreat to the starting position under the combined action of the reverse force F01 and the external retraction force (provided by the power drive system separately provided on the push plate furnace 100). In this process, the gravity string 4 first returns to the U-shaped section 502 of the hook-shaped gravity rail 5, and the pull rod 601 stops retreating due to the loss of the backward pulling force. Under the action of the external retraction force (provided by the power drive system), the push plate furnace 100 continues to retreat backward, and the blocker 603 and the front blocker plate 604 slide backward on the pull rod 601 along with the push plate furnace 100 through the second slide groove 605 until the push plate furnace 100 stops retreating.

[0054] like Fig.12 , 13As shown, the buffer spring 606 is arranged between the blocking plate 604 and the blocker 603, and the buffer holes 6031 are arranged on both sides of the second slide slot 605 at the front end of the blocker 603, and there are two buffer springs 606, which are respectively installed in the two buffer holes 6031, and the guide pressure rods 6041 are respectively arranged on both sides of the second slide slot 605 at the rear side of the blocking plate 604, and the two guide pressure rods 6041 are respectively inserted into the two buffer holes 6031 and press the front end of the buffer spring 606. When the blocking plate 604 contacts the hanging cake 6011 and is subjected to the impact force of the hanging cake 6011, the buffer spring 606 buffers the impact force.

[0055] like Figure 8 , 9 As shown in Figure 10, a tubular stop sleeve 607 is provided at the connection part between the pull rod 601 and the traction rope 3, the front end of the traction rope 3 and the rear end of the pull rod 601 are fixed in the tube hole of the stop sleeve 607, and a stop baffle 608 is provided on the pull rod support body 602 behind the slide groove 1 6021, and the stop baffle 608 is provided with a slide groove 3 6082 for only the traction rope 3 to slide through, and the fixed position of the stop baffle 608 on the pull rod support body 602 can be adjusted forward and backward, which is used to adjust the height of the front end of the gravity string 4 on the front steep slope section 5021, and then adjust the size of the initial reverse force F01.

[0056] A plurality of positioning bolt holes 6022 are longitudinally arranged on the tie rod support body 602, and the backstop baffle 608 is fixed to the tie rod support body 602 through bolts 6023 and positioning bolt holes 6022. When fixing, the front and rear positions of the backstop baffle 608 on the tie rod support body 602 are adjusted by selecting the front or rear positioning bolt hole 6022.

[0057] A buffer rubber layer 6081 is provided in the middle of the backstop baffle 608 .

[0058] Embodiment 2:

[0059] like Fig.14 , 15As shown in Figures 1 and 16, a push plate furnace with a reverse force application system includes a furnace tube 1, an electric heating body arranged on the outer periphery of the furnace tube 1, and an insulation layer arranged between the electric heating body and the furnace shell. A longitudinal push slide rail is arranged in the furnace tube 1, and a push rod 9 is arranged at the rear of the furnace tube 1, which can penetrate into the furnace tube to a certain depth to push the material box 7 in the furnace tube 1 forward. The push plate furnace 100 also includes a driving motor 10, and sliding wheels 11 arranged on both sides of the bottom of the push plate furnace 100 and running on the track 8. The sliding wheels 11 located on both sides of the middle and rear of the push plate furnace 100 are respectively fixed on the support plates 12 arranged on both sides of the bottom of the push plate furnace 100, so as to facilitate the setting of the hanging mechanism in the force application system. The sliding wheels 11 located on both sides of the front of the push plate furnace 100 are installed in the form of a wheel pair at the bottom of the push plate furnace 100. Between the two corresponding sliding wheels 11 on the left and right, a wheel pair shaft 13 is provided, and the two ends are fixedly connected to the two sliding wheels 11. The driving motor 10 establishes a driving relationship with the wheel pair shaft 13. By driving the wheel pair shaft 13 and its sliding wheels 11 to rotate, the push plate furnace 100 can slide on the track 8. When discharging, the driving motor 10 drives the push plate furnace 100 to start accelerating from the starting position. When the set speed is reached, the driving motor 10 stops providing the forward driving force to the push plate furnace 100. At the same time, the reverse force system applies a reverse force F01 to the push plate furnace 100 to make the push plate furnace 100 perform a negative acceleration motion relative to the discharging direction, and all the material boxes 7 to be discharged in the furnace tube 1 obtain the forward (discharging direction) inertia force F1. The inertia force F1 is used as the main thrust for the material box 7 to be discharged from the furnace, and the forward thrust F2 applied by the push rod 9 to the last material box 7 in the furnace tube 1 is used as the auxiliary thrust to push all the material boxes 7 arranged front and back in the entire furnace tube 1 to slide forward. In this way, the inertia force F1 of the material box 7 can be increased as much as possible, and the forward thrust F2 received by the material box 7 can be reduced accordingly, so that the pressure between the material boxes 7 and the material boxes 7 is greatly reduced during the discharge, and the reduction can reach more than 90%, so that the content of the furnace tube 1 can be expanded several times as needed, so that the volume of the material box 7 is larger, the number is more, and the production efficiency of the sintering process is improved several times.

[0060] Furthermore, the push plate furnace 100 further includes a temporary storage platform 14 provided in front of the furnace tube 1 for temporarily storing the pushed out material boxes 7 during the sliding process of the push plate furnace 100, and a feeding platform 15 provided at the rear of the furnace tube 1 for placing the material boxes 7, and the main electric cylinder for pushing the push rod 9 is provided at the rear of the feeding platform 15. In this way, the push plate furnace 100 can discharge materials during the movement, and the pushed out material boxes 7 are temporarily stored on the temporary storage platform 14 with the push plate furnace 100, and the material boxes 7 on the temporary storage platform 14 are moved away after the push plate furnace 100 returns to the starting point.

[0061] The above implementation modes 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 reverse force application system for a push plate furnace, characterized in that: The invention comprises a suspension frame (2) arranged at the rear of a push plate furnace (100), a gravity string (4) formed by connecting a plurality of gravity bodies (400) in series in an articulated manner, a traction mechanism having a traction rope (3), and a hanging mechanism capable of connecting the traction rope (3) and the push plate furnace (100), wherein the rear end of the traction rope (3) is connected to the front end of the gravity string (4), and the front end can be hung with the push plate furnace (100) sliding forward through the hanging mechanism. When the traction rope (3) is hung with the push plate furnace (100) sliding forward through the hanging mechanism, the traction rope (3) can sequentially lift and elevate the gravity bodies (400) of the gravity string (4) from front to back on the suspension frame (2), so that the push plate furnace (100) sliding forward is continuously subjected to a continuously increasing reverse force F01.

2. The reverse force application system for a push plate furnace according to claim 1, characterized in that: The traction mechanism further comprises a fixed pulley 1 (201) arranged at the top of the suspension frame (2) and a fixed pulley 2 (202) arranged at the bottom of the suspension frame (2); the traction rope (3) passes over the fixed pulley 1 (201) at the top of the suspension frame (2) and the fixed pulley 2 (202) at the bottom, with the rear end hanging downward, the rear end of the traction rope (3) being connected to the gravity body (400) at the front end of the gravity string (4), and the front end extending horizontally forward to be connected to the hanging mechanism.

3. The reverse force application system for a push plate furnace according to claim 1, characterized in that: The weight of the rear gravity body (400) is smaller than the weight of the front gravity body (400).

4. The reverse force application system for a push plate furnace according to claim 2, characterized in that: Two hook-shaped gravity rails (5) are arranged on the rear of the suspension frame (2) and are parallel to each other and are shaped like fish hooks when viewed from the side. The hook-shaped gravity rail (5) comprises an upper upright section (501) and a lower U-shaped section (502). The front section and the rear section of the U-shaped section (502) are respectively a front steep slope section (5021) and a rear steep slope section (5023). The bottom connecting section between the front steep slope section (5021) and the rear steep slope section (5023) is a bottom arc section (5022). The upper end of the front steep slope section (5021) is connected to the lower end of the upright section (501). At the bottom of each gravity body (400) of the gravity string (4), a plurality of gravity bodies (400) are connected to each other. Running wheels (403) running on the hook-shaped gravity rail (5) are respectively arranged on both sides of the part, and the gravity string (4) is placed on the U-shaped section (502) of the hook-shaped gravity rail (5). When the traction rope (3) does not apply an upward traction force, the multiple gravity bodies (400) at the front, middle and rear parts of the gravity string (4) naturally stay at the front steep slope section (5021), the bottom arc section (5022) and the rear steep slope section (5023) of the U-shaped section (502) by gravity balance. When the traction rope (3) applies an upward traction force, the gravity string (4) loses its gravity balance and begins to rise upward along the front steep slope section (5021) and the upright section.

5. The reverse force application system for a push plate furnace according to claim 1, characterized in that: The gravity body (400) comprises a frame (401) and a counterweight block (402) fixed in the frame (401). The weight of each gravity body (400) is determined by the volume and / or number of the counterweight blocks (402).

6. The reverse force application system for a push plate furnace according to claim 5, characterized in that: The frame (401) comprises a bottom plate (4011), a front end plate (4012), a rear end plate (4013) and a connecting plate (4014); the front end plate (4012) and the rear end plate (4013) are respectively fixed to the front end and the rear end of the bottom plate (4011); the connecting plate (4014) is longitudinally fixed between the front end plate (4012) and the rear end plate (4013); and two counterweight spaces for loading counterweight blocks (402) are formed between the front end plate (4012) and the rear end plate (4013) on both sides of the connecting plate (4014). (4015), corresponding screw holes (4016) are set on the connecting plate (4014) and the counterweight block (402), when loading the counterweight block (402), the counterweight blocks (402) of the same weight are loaded in the two counterweight spaces (4015) at the same time, and a screw (4017) with an external thread is used to penetrate the counterweight blocks (402) on both sides and the screw holes (4016) on the connecting plate (4014), and nuts are fastened at both ends of the screw (4017), so that the counterweight blocks (402) on both sides are constrained on the connecting plate (4014).

7. The reverse force application system for a push plate furnace according to claim 2, characterized in that: A connecting mechanism (6) between the traction rope (3) and the push plate furnace (100) is provided at the bottom of the middle and rear section of the push plate furnace (100), the connecting mechanism (6) comprising: a pull rod (601), a hanging cake (6011) fixed at the front end of the pull rod (601), a stabilizing support wing (6012) fixed at the bottom of the pull rod (601) and arranged along the length direction of the pull rod (601), a pull rod support body (602) fixed to the ground, a slide groove (6021) provided at the top of the pull rod support body (602) for accommodating and limiting the stabilizing support wing (6012), a blocker (603) fixed at the rear end of the bottom of the push plate furnace, and a sprocket (6011) provided in front of the blocker (603). The blocking plate (604) is disposed at the end thereof, and a longitudinal chute 2 (605) is disposed at the bottom of the blocking plate (603) and the blocking plate (604). The stabilizing support wing (6012) of the pull rod (601) is located in the chute 1 (6021) at the top of the pull rod support body and can slide forward and backward in the chute 1 (6021). The pull rod (601) is located in the chute 2 (605) at the bottom of the blocking plate (603) and the blocking plate (604). Before the push plate furnace (100) starts to accelerate, the spacing between the blocking plate (604) and the hanging cake (6011) at the front end of the pull rod (601) is set to be equal to the distance taken for the push plate furnace (100) to start accelerating and reach the set speed.

8. The reverse force application system for a push plate furnace according to claim 7, characterized in that: A tubular stop sleeve (607) is provided at the connection portion between the pull rod (601) and the traction rope (3); the front end of the traction rope (3) and the rear end of the pull rod (601) are both fixed in the tube hole of the stop sleeve (607); a stop baffle (608) is provided on the pull rod support body (602) behind the first slide groove (6021); a third slide groove (6082) is provided on the stop baffle (608) for only the traction rope (3) to slide through; and the fixed position of the stop baffle (608) on the pull rod support body (602) can be adjusted forward and backward.

9. A push plate furnace with a reverse force application system as claimed in claim 1, comprising a furnace tube (1), an electric heating body arranged on the outer periphery of the furnace tube (1), and an insulation layer arranged between the electric heating body and the furnace shell, a longitudinal pushing slide rail is arranged in the furnace tube (1), and a push rod (9) is arranged at the rear of the furnace tube (1) and can penetrate into the furnace tube to a certain depth to push the material box (7) in the furnace tube (1) forward, characterized in that: It also includes a driving motor (10), and sliding wheels (11) arranged on both sides of the bottom of the push plate furnace (100) and running on the track (8). The sliding wheels (11) located on both sides of the middle and rear parts of the push plate furnace (100) are respectively fixed on support plates (12) arranged on both sides of the bottom of the push plate furnace (100). The sliding wheels (11) located on both sides of the front part of the push plate furnace (100) are installed on the bottom of the push plate furnace (100) in the form of a wheel pair. A wheel pair shaft (13) with two ends fixedly connected to the two sliding wheels (11) is provided between the two corresponding left and right sliding wheels (11). The driving motor (10) establishes a driving relationship with the wheel pair shaft (13). By driving the wheel pair shaft (13) and its sliding wheels (11) to rotate, the push plate furnace (100) can slide on the track (8).

10. The push plate furnace according to claim 9, characterized in that: It also includes a temporary storage platform (14) arranged in front of the furnace tube (1) for temporarily storing the material box (7) pushed out during the sliding process of the push plate furnace (100), and a feeding platform (15) arranged behind the furnace tube (1) for placing the grouping material box (7), and the main electric cylinder for pushing the push rod (9) is arranged behind the feeding platform (15).

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