Hot air circulation preheating furnace

Abstract

The utility model discloses a hot air circulation preheating furnace which comprises a control box, a heat preservation furnace body, a furnace door, a supporting flat plate, an in-out driving mechanism, two workpiece storage trolleys, two feeding and discharging platforms and two push-pull driving mechanisms. According to the hot air circulation preheating furnace, the two push-pull driving mechanisms are adopted to push and pull the two workpiece storage trolleys to move on the supporting flat plate and the two feeding and discharging platforms, so that when one workpiece storage trolley loads workpieces into the heat preservation furnace body for preheating, the other workpiece storage trolley is in the workpiece loading and unloading state; and quick push-pull switching is carried out after the workpiece storage trolley in the heat preservation furnace body loads the workpieces and preheating is completed, the time for loading and unloading the workpieces is saved, the working efficiency is effectively improved, the switching process does not need to be completed manually, and high use safety is achieved.

Description

Technical Field

[0001] The utility model relates to a preheating furnace, in particular to a hot air circulation preheating furnace. Background Art

[0002] The preheating furnace is a heating device used for quickly preheating workpieces. The existing preheating furnace adopts an opening method at the top, which is not only inconvenient to use, but also inconvenient to place and take out workpieces when preheating large workpieces. Especially when preheating a batch of workpieces, the overall efficiency is not high. Therefore, it is necessary to design a hot air circulation preheating furnace that is convenient to use and can improve work efficiency. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a hot air circulation preheating furnace that can facilitate the loading and unloading of workpieces and effectively improve work efficiency.

[0004] Technical Solution: The hot air circulation preheating furnace described in the utility model includes a control box, a heat preservation furnace body, a furnace door, a support flat plate, an inlet and outlet driving mechanism, two workpiece storage trolleys, two loading and unloading platforms, and two pushing and pulling driving mechanisms;

[0005] One end of the support flat plate is horizontally installed on the inner side surface of the furnace door, and the other end enters the heat preservation furnace body from the front inlet and outlet of the heat preservation furnace body and is longitudinally movably supported on the inner bottom of the heat preservation furnace body; two support rollers for moving support are installed on the lower side edge of the furnace door; the two loading and unloading platforms are respectively installed on the left and right sides of the front inlet and outlet of the heat preservation furnace body, and the two pushing and pulling driving mechanisms are respectively installed on the two loading and unloading platforms; the two workpiece storage trolleys transversely move on the support flat plate and the two loading and unloading platforms, and the two pushing and pulling driving mechanisms are used to push and pull the two workpiece storage trolleys to move on the support flat plate and the two loading and unloading platforms; the inlet and outlet driving mechanism and the two pushing and pulling driving mechanisms are both driven and controlled by the control box.

[0006] Furthermore, the loading and unloading platform includes a platform support plate and bottom support legs; the bottom support legs are vertically fixed on the lower side surface of the platform support plate; two track grooves are horizontally installed on the upper side surfaces of both the platform support plate and the support flat plate; the workpiece storage trolley includes a trolley flat plate, a guardrail, and two rows of trolley rollers; the guardrail is arranged at the edge of the upper side surface of the trolley flat plate, and the two rows of trolley rollers are horizontally arranged on the lower side surface of the trolley flat plate for supporting and walking on the corresponding track grooves.

[0007] Further, the push-pull drive mechanism includes a push-pull drive motor, a push-pull sliding track, a push-pull drive rack, a push-pull sliding seat, a connecting rod, and a push-pull drive seat; a rectangular fixed seat is vertically arranged at each of the left and right side edges of the lower side surface of the trolley flat plate; the push-pull sliding track is horizontally installed on the loading and unloading platform, and the push-pull sliding seat is slidably installed on the push-pull sliding track; a strip-shaped groove is horizontally arranged on the push-pull sliding track, and the push-pull drive rack is horizontally fixedly installed in the strip-shaped groove; a gear groove is arranged on the push-pull sliding seat, the push-pull drive motor is installed on the push-pull sliding seat, and the end of the output shaft of the push-pull drive motor extends into the gear groove, and a drive gear is installed on the extending end; the drive gear meshes with the push-pull drive rack; the push-pull drive seat is fixedly connected to the push-pull sliding seat through a connecting rod, and a drive notch for buckling to one side edge of the rectangular fixed seat is arranged on the side edge of the push-pull drive seat; the push-pull drive motor is driven and controlled by a control box.

[0008] Further, an elastic limit seat is arranged at each of the left and right side edges of the upper side surface of the support flat plate. An elastic limit post is elastically telescopically arranged on the elastic limit seat, and the telescopic end of the elastic limit post is set to be arc-shaped for elastically squeezing and limiting the other side edge of the rectangular fixed seat at the corresponding side edge of the lower side surface of the trolley flat plate.

[0009] Further, a U-shaped partition is fixedly installed in the heat preservation furnace body for forming a U-shaped return air cavity on the left inner wall, the bottom inner wall, and the right inner wall of the heat preservation furnace body; a plurality of air distribution holes are distributed on the left and right side plates of the U-shaped partition; a plurality of support short columns supporting between the bottom inner wall of the heat preservation furnace body and the U-shaped partition are vertically arranged in the lower cavity of the U-shaped return air cavity; a circulating fan is installed in the left cavity of the U-shaped return air cavity for blowing air into the lower cavity of the U-shaped return air cavity; an electric heating tube is arranged in the lower cavity of the U-shaped return air cavity.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: Two push-pull drive mechanisms are used to push and pull two workpiece storage trolleys to move on the support flat plate and two loading and unloading platforms, so that when one workpiece storage trolley loads a workpiece and enters the heat preservation furnace body for preheating, the other workpiece storage trolley is in the state of loading and unloading the workpiece, and waits for a quick push-pull switch after the workpiece storage trolley in the heat preservation furnace body finishes loading and preheating the workpiece, saving the time for loading and unloading the workpiece, effectively improving the work efficiency, and the switching process does not need to be completed manually, having high use safety; The support rollers can support the furnace door and realize the in-out drive of the furnace door and the support flat plate under the push of the in-out drive mechanism, without manual push-pull operation, effectively saving labor and having high use safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0012] Figure 2 is a partial sectional structure schematic diagram of the present utility model;

[0013] Figure 3 is a sectional structure schematic diagram of the heat preservation furnace body of the present utility model;

[0014] Figure 4 is a distribution structure schematic diagram of two loading and unloading platforms of the present utility model;

[0015] Figure 5 is an installation structure schematic diagram of the push-pull sliding seat of the present utility model;

[0016] Figure 6 is a circuit structure schematic diagram of the present utility model. Specific embodiments

[0017] The technical solution of the present utility model will be described in detail below with reference to the accompanying drawings, but the protection scope of the present utility model is not limited to the described embodiments.

[0018] Embodiment 1:

[0019] As Figure 1-6 shown, the hot air circulation preheating furnace disclosed by the present utility model includes: a control box 4, a heat preservation furnace body 1, a furnace door 2, a support flat plate 13, an inlet and outlet driving mechanism, two workpiece storage trolleys, two loading and unloading platforms, and two push-pull driving mechanisms;

[0020] The heat preservation furnace body 1 is horizontally and longitudinally installed on the ground through a bottom support column 29; one end of the support flat plate 13 is horizontally installed on the inner side surface of the furnace door 2, and the other end enters the heat preservation furnace body 1 from the front side inlet and outlet of the heat preservation furnace body 1 and is longitudinally movably supported on the inner bottom of the heat preservation furnace body 1; two support rollers 10 for moving support are installed on the lower side edge of the furnace door 2 through roller supports 9; the two loading and unloading platforms are respectively installed on the left and right sides of the front side inlet and outlet of the heat preservation furnace body 1, and the two push-pull driving mechanisms are respectively installed on the two loading and unloading platforms; the two workpiece storage trolleys horizontally and movably travel on the support flat plate 13 and the two loading and unloading platforms, and the two push-pull driving mechanisms are used to push and pull the two workpiece storage trolleys to move on the support flat plate 13 and the two loading and unloading platforms; the inlet and outlet driving mechanism and the two push-pull driving mechanisms are both driven and controlled by the control box 4.

[0021] Two push-pull drive mechanisms are adopted to push and pull two workpiece storage trolleys to move on the support flat plate 13 and two loading and unloading platforms. When one workpiece storage trolley loads workpieces into the heat preservation furnace body 1 for preheating, the other workpiece storage trolley is in the state of loading and unloading workpieces, and waits for a quick push-pull switch after the workpiece storage trolley in the heat preservation furnace body 1 finishes loading and preheating the workpieces, saving the time for loading and unloading workpieces, effectively improving the work efficiency, and the switching process does not need to be completed manually, with high use safety; the support rollers 10 can support the furnace door 2 and realize the in-and-out drive of the furnace door 2 and the support flat plate 13 under the push of the in-and-out drive mechanism, without manual push-pull operation, effectively saving workers and having high use safety.

[0022] Furthermore, a boss 11 extending into the front side inlet and outlet of the heat preservation furnace body 1 is arranged on the inner side surface of the furnace door 2, so as to enhance the heat preservation performance at the front side inlet and outlet.

[0023] Furthermore, two support rails 12 are longitudinally arranged on the front side ground of the heat preservation furnace body 1, and the two support rollers 10 respectively support and travel on the two support rails 12, so as to effectively enhance the stability of the support and travel of the two support rollers 10.

[0024] Furthermore, the loading and unloading platform includes a platform support plate 15 and bottom support legs 14; the bottom support legs 14 are vertically fixed on the lower side surface of the platform support plate 15; two track grooves 16 are horizontally installed on the upper side surfaces of the platform support plate 15 and the support flat plate 13; the workpiece storage trolley includes a trolley flat plate 3, a guardrail 5 and two rows of trolley rollers 17; the guardrail 5 is arranged at the edge of the upper side surface of the trolley flat plate 3, and the two rows of trolley rollers 17 are horizontally arranged on the lower side surface of the trolley flat plate 3 for supporting and traveling on the track grooves 16 at corresponding positions, and each row of trolley rollers 17 has at least 4 trolley rollers 17. The two rows of trolley rollers 17 can smoothly pass through the gap between the platform support plate 15 and the support flat plate 13, ensuring the stability of the lateral movement of the workpiece storage trolley.

[0025] Furthermore, the push-pull driving mechanism includes a push-pull driving motor 18, a push-pull sliding track 22, a push-pull driving rack 27, a push-pull sliding seat 19, a connecting rod 26, and a push-pull driving seat 23; a rectangular fixed seat 24 is vertically arranged on the left and right side edges of the lower side surface of the trolley flat plate 3; the push-pull sliding track 22 is horizontally installed on the loading and unloading platform, and the push-pull sliding seat 19 is slidably installed on the push-pull sliding track 22; a strip-shaped groove is horizontally arranged on the push-pull sliding track 22, and the push-pull driving rack 27 is horizontally and fixedly installed in the strip-shaped groove; a gear groove 38 is arranged on the push-pull sliding seat 19, the push-pull driving motor 18 is installed on the push-pull sliding seat 19, and the end of the output shaft of the push-pull driving motor 18 extends into the gear groove 38, and a driving gear 39 is installed on the extending end; the driving gear 39 meshes with the push-pull driving rack 27; the push-pull driving seat 23 is fixedly connected to the push-pull sliding seat 19 through the connecting rod 26, and a driving notch 25 for buckling to one side edge of the rectangular fixed seat 24 is arranged on the side edge of the push-pull driving seat 23; the push-pull driving motor 18 is driven and controlled by the controller of the control box 4 through the push-pull driving circuit. By the cooperation of the push-pull driving motor 18, the push-pull sliding track 22, the push-pull driving rack 27, and the driving gear 39, the lateral sliding drive of the push-pull sliding seat 19 can be realized, so as to adjust the lateral position of the push-pull driving seat 23, realize the buckling and push-pull driving of the rectangular fixed seat 24.

[0026] Furthermore, an elastic limit seat 20 is arranged on the left and right side edges of the upper side surface of the support flat plate 13, an elastic limit post 21 is elastically telescoped on the elastic limit seat 20, and the telescopic end of the elastic limit post 21 is set to be arc-shaped for elastically extruding and limiting the other side edge of the rectangular fixed seat 24 at the corresponding side edge of the lower side surface of the trolley flat plate 3. The elastic limit posts 21 installed in an elastic telescopic manner on the left and right sides can block and limit the two rectangular fixed seats 24 on the lower side surface of the trolley flat plate 3, thereby enhancing the stability of the workpiece storage trolley on the support flat plate 13.

[0027] Further, a U-shaped partition 30 is fixedly installed in the heat preservation furnace body 1, which is used to form a U-shaped return air cavity on the left inner wall, bottom inner wall and right inner wall of the heat preservation furnace body 1; each air distribution hole 34 is distributed on the left and right side plates of the U-shaped partition 30; each support short column 31 that supports between the bottom inner wall of the heat preservation furnace body 1 and the U-shaped partition 30 is vertically arranged in the lower cavity of the U-shaped return air cavity; a circulation fan 36 is installed in the left cavity of the U-shaped return air cavity, which is used to blow air into the lower cavity of the U-shaped return air cavity; an electric heating tube 32 is arranged in the lower cavity of the U-shaped return air cavity; an electric control switch is connected in series on the power supply line of the electric heating tube 32; a temperature sensor 35 is arranged on the inner top of the heat preservation furnace body 1; the controller of the control box 4 drives and controls the circulation fan 36 through the fan drive circuit. Using the U-shaped partition 30 to form a U-shaped return air cavity and forming a passage through each air distribution hole 34 on both sides, the circulating heating of the preheated air flow can be realized.

[0028] Further, a junction box 37 is arranged on the outer side surface of the heat preservation furnace body 1, and the wiring end of the electric heating tube 32 extends into the junction box 37, so as to protect the wiring end safely.

[0029] Further, the control box 4 includes a controller, a translation drive circuit, a push-pull drive circuit, an electric control switch and a fan drive circuit arranged in the box body, and a display screen, a button panel and a sound and light alarm are arranged on the outer side surface of the box body; the controller is electrically connected to the translation drive circuit, the push-pull drive circuit, the electric control switch, the fan drive circuit, the display screen, the button panel, the sound and light alarm and the temperature sensor 35 respectively.

[0030] Further, the inlet and outlet drive mechanism includes a translation drive motor 6 and a translation drive lead screw 7; a translation drive seat 8 is arranged in the middle of the lower side of the furnace door 2; the translation drive lead screw 7 is longitudinally rotatably installed below the front side of the heat preservation furnace body 1; the translation drive motor 6 is used to rotate and drive the translation drive lead screw 7; the translation drive lead screw 7 is threadedly installed through the translation drive seat 8 in a threaded manner; the controller drives and controls the translation drive motor 6 through the translation drive circuit.

[0031] Further, two flat plate support rollers 28 are rotatably installed at the end of the support flat plate 13, and two flat plate support tracks 33 are longitudinally arranged on the upper side surface of the lower side plate of the U-shaped partition 30, and the two flat plate support rollers 28 respectively run on the two flat plate support tracks 33 to stably support the two flat plate support rollers 28.

[0032] In the hot air circulation preheating furnace disclosed by the present utility model, the controller adopts an existing single-chip microcomputer control module for realizing coordinated control. The translation drive circuit, the push-pull drive circuit and the fan drive circuit all adopt existing motor drive circuits for respectively driving and controlling the motors of the translation drive motor 6, the push-pull drive motor 18 and the circulation fan 36. The translation drive motor 6 and the push-pull drive motor 18 both adopt existing stepping motors, which can realize precise control.

[0033] When the hot air circulation preheating furnace disclosed by the present utility model is in use, the worker sets the preheating temperature according to the preheating requirement by pressing the key panel, and the display screen real-time displays the set preheating temperature and the real-time temperature in the heat preservation furnace body 1; the worker loads the workpiece to be preheated in a workpiece storage trolley, and then starts the work through the key panel control system. The translation drive motor 6 drives the translation drive lead screw 7 to rotate, driving the furnace door 2 to cover the front inlet and outlet of the heat preservation furnace body 1. At the same time, the support flat plate 13 bears the workpiece storage trolley into the heat preservation furnace body 1. The controller turns on the electric heating tube 32 through the electric control switch to start heating, and at the same time controls the circulation fan 36 through the fan drive circuit to realize the circulating heating of the heating air flow; the temperature sensor 35 real-time monitors the stability in the heat preservation furnace body 1, so that the controller realizes the real-time control of the electric control switch to realize the feedback control of the temperature, keeping the temperature within the preheating temperature range; during the workpiece preheating process, the worker loads the workpiece on another workpiece storage trolley; after the preheating is completed, the controller drives and controls the translation drive motor 6 to open the furnace door 2 and drag the support flat plate 13 to move out of the heat preservation furnace body 1. At the same time, the controller drives the sound and light alarm to remind the worker to pay attention to safety; when the support flat plate 13 moves to the middle set position, the controller drives and controls the push-pull drive motor 18 on the idle side to make the push-pull drive seat 23 extend and be in place, and then the controller continues to drive and control the translation drive motor 6 to make the furnace door 2 reach the final parking position, at this time the drive slot 25 just buckles on the rectangular fixed seat 24; then the controller drives and controls the push-pull drive motor 18 on this side to drag the workpiece storage trolley to move to the idle platform support plate 15, facilitating the worker to unload the workpiece; then the controller drives and controls the push-pull drive motor 18 on the other side to push the workpiece storage trolley loaded with the workpiece to move onto the support flat plate 13. The two limit convex columns 21 limit the two rectangular fixed seats 24, and then the controller drives and controls the translation drive motor 6 to make the furnace door 2 move towards the front inlet and outlet of the heat preservation furnace body 1, and then drives the push-pull drive motor 18 to make the push-pull drive seat 23 retract; repeating the above process can complete the continuous batch preheating of workpieces, with high work efficiency.

[0034] As described above, although the present utility model has been shown and described with reference to specific preferred embodiments, it should not be construed as a limitation on the present utility model itself. Various changes in form and detail may be made thereto without departing from the spirit and scope of the present utility model as defined by the appended claims.

Claims

1. A hot air circulation preheating furnace, characterized in that: It comprises a control box (4), a heat-insulating furnace body (1), a furnace door (2), a support plate (13), an in-and-out drive mechanism, two workpiece storage trolleys, two loading and unloading platforms, and two push-pull drive mechanisms; One end of the support plate (13) is horizontally mounted on the inner side of the furnace door (2), and the other end enters the heat preservation furnace body (1) through the front inlet and outlet of the heat preservation furnace body (1), and is longitudinally movably supported on the inner bottom of the heat preservation furnace body (1); two support rollers (10) for movable support are mounted on the lower side of the furnace door (2); two loading and unloading platforms are respectively mounted on the left and right sides of the front inlet and outlet of the heat preservation furnace body (1), and two push-pull drive mechanisms are respectively mounted on the two loading and unloading platforms; Two workpiece storage trolleys move transversely on the support plate (13) and the two loading and unloading platforms, and two push-pull drive mechanisms are used to push-pull drive the two workpiece storage trolleys to move on the support plate (13) and the two loading and unloading platforms; the in-and-out drive mechanism and the two push-pull drive mechanisms are all driven and controlled by the control box (4).

2. The hot air circulation preheating furnace according to claim 1, characterized in that: The loading and unloading platform comprises a platform support plate (15) and a bottom support leg (14); the bottom support leg (14) is vertically fixed on the lower side of the platform support plate (15); two track grooves (16) are horizontally installed on the upper side of the platform support plate (15) and the support plate (13); the workpiece storage trolley comprises a trolley plate (3), a guardrail (5) and two rows of trolley rollers (17); the guardrail (5) is arranged at the edge of the upper side of the trolley plate (3), and the two rows of trolley rollers (17) are horizontally arranged on the lower side of the trolley plate (3) for supporting walking on the track grooves (16) at corresponding positions.

3. The hot air circulation preheating furnace according to claim 1, characterized in that: The push-pull drive mechanism comprises a push-pull drive motor (18), a push-pull sliding rail (22), a push-pull drive rack (27), a push-pull sliding seat (19), a connecting rod (26) and a push-pull drive seat (23); a rectangular fixed seat (24) is vertically arranged at the left and right sides of the lower side of the trolley flat plate (3); the push-pull sliding rail (22) is horizontally installed on the loading and unloading platform, and the push-pull sliding seat (19) is slidably installed on the push-pull sliding rail (22); a strip groove is horizontally arranged on the push-pull sliding rail (22), and the push-pull drive rack (27) is horizontally fixedly installed in the strip groove; on the push-pull sliding seat (1 9) is provided with a gear groove (38), the push-pull drive motor (18) is installed on the push-pull sliding seat (19), and the output shaft end of the push-pull drive motor (18) extends into the gear groove (38), and a drive gear (39) is installed on the extended end; the drive gear (39) is meshed with the push-pull drive rack (27); the push-pull drive seat (23) is fixedly connected to the push-pull sliding seat (19) through a connecting rod (26), and a drive notch (25) for snapping into a side edge of a rectangular fixed seat (24) is provided on the side edge of the push-pull drive seat (23); the push-pull drive motor (18) is driven and controlled by the control box (4).

4. The hot air circulation preheating furnace according to claim 3, characterized in that: An elastic limiting seat (20) is arranged at the left and right sides of the upper side of the supporting plate (13), and a limiting convex column (21) is elastically and telescopically arranged on the elastic limiting seat (20), and the telescopic end of the limiting convex column (21) is arranged in an arc shape, which is used to elastically squeeze and limit the other side of the rectangular fixing seat (24) at the corresponding side of the lower side of the trolley plate (3).

5. The hot air circulation preheating furnace according to claim 1, characterized in that: A U-shaped partition (30) is fixedly installed in the heat-insulating furnace body (1) and is used to form a U-shaped return air cavity on the left inner wall, the bottom inner wall and the right inner wall of the heat-insulating furnace body (1); air distribution holes (34) are evenly distributed on the left and right side plates of the U-shaped partition (30); in the lower cavity of the U-shaped return air cavity, various supporting short columns (31) are vertically arranged and supported between the bottom inner wall of the heat-insulating furnace body (1) and the U-shaped partition (30); a circulating fan (36) is installed in the left cavity of the U-shaped return air cavity and is used to blow air into the lower cavity of the U-shaped return air cavity; and an electric heating pipe (32) is arranged in the lower cavity of the U-shaped return air cavity.

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