Heat dissipation device of bottom net sand box for casting

Abstract

The invention provides a heat dissipation device for a bottom net sand box for casting, and relates to the technical field of full mold casting, two S-shaped heat dissipation pipelines are arranged and connected together through reinforcing ribs to form a directional shape, so that the structure is stable, and the circulation time of compressed air is long due to the S-shaped arrangement; the compressed air tank inputs air to the ventilation connectors, when the two ventilation connectors are close to each other, the two ventilation connectors are inserted into the first openings of the two heat dissipation pipelines to conduct compressed air ventilation, the compressed air circulates in the heat dissipation pipelines, heat dissipation is conducted on the bottom of the sand box located above the heat dissipation pipelines through the air inlets, and finally the compressed air flows out of the second openings. The flowing-out compressed air is high in temperature and is extracted and discharged through an air extracting pump; in this way, the temperature of one end of the second opening is too high, the two ventilation connectors can be moved to be far away from each other, the two ventilation connectors are inserted into the second opening to conduct heat dissipation through compressed air, the outflowing compressed air flows out of the first opening and then is exhausted through an air pump, and uniform cooling is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of full-mold casting, and in particular to a device for dissipating heat from a bottom mesh sand box used for casting. Background Art

[0002] Full mold casting refers to a method of casting in which a polystyrene foam plastic mold is used instead of an ordinary mold. After the mold is made, the molten metal is poured into the mold without taking out the mold. Under the action of the molten metal, the plastic mold burns, gasifies, and disappears. The molten metal replaces the space occupied by the original plastic mold. After cooling and solidification, the desired casting is obtained. A sand box is required during the pouring process. A large amount of heat is generated during the pouring process. During the cooling process, the bottom of the sand box cannot dissipate heat, resulting in uneven heat dissipation and abnormal castings. Prior art patent CN106392022A discloses a water-cooled sand casting box, which accelerates heat dissipation by flowing condensate through a condenser tube arranged at the bottom of the box body, further expands the heat dissipation area by supporting pillars arranged between the condenser tubes, radiates the casting heat inside the box body to the outside, and plays a role in bearing pressure and protecting the condenser tube, thereby shortening the cooling time and improving the casting efficiency. This patent uses condensate to dissipate heat, but how to discharge the condensate after dissipating the heat, and whether to reuse or discard it after dissipation are all problems. For compressed air cooling, there is no problem of how to deal with the follow-up. After compressed air is cooled, the heat is directly removed, which is more convenient to use. However, how to ensure the uniformity of cooling is a key. When compressed air enters the cooling pipe, the temperature at the front end is necessarily low and the temperature at the back end is high from front to back, so the cooling uniformity is poor. Therefore, it is very important to solve this problem. Summary of the invention

[0003] In view of this, the purpose of the present invention is to propose a device for dissipating heat from a bottom screen sand box for casting, which solves the problem that when compressed air enters the cooling pipe, the temperature at the front end is low and the temperature at the rear end is high from front to back, resulting in poor cooling uniformity.

[0004] Based on the above purpose, the present invention provides a device for heat dissipation of a bottom screen sand box for casting, comprising two serpentine heat dissipation pipes on the ground, the two heat dissipation pipes are connected together by reinforcing ribs to form a square shape; the ends of the two heat dissipation pipes on the side close to each other are opening one, and the ends of the two heat dissipation pipes on the side away from each other are opening two, and opening one and opening two are located on the same side; air inlets are distributed on the top of the heat dissipation pipes; a compressed air tank is arranged on one side of the opening one and the opening two, and the compressed air tank is connected to two movable ventilation joints through two ventilation hoses, and the ventilation joints The size of the two ventilation joints is adapted to the two heat dissipation pipes, and the two ventilation joints are respectively corresponding to the two heat dissipation pipes, and the positions of the two ventilation joints are close to or far away from each other; two vacuum pumps are also arranged on one side of the opening one and the opening two, and the vacuum pumps are connected to a movable vacuum hood through a vacuum hose, and the two vacuum hoods respectively correspond to the two heat dissipation pipes, and the positions of the two vacuum hoods are close to or far away from each other; when the positions of the two ventilation joints are close to each other and aligned with the opening one, the positions of the two vacuum hoods are far away from each other and face the opening two; when the positions of the two ventilation joints are far away from each other and aligned with the opening two, the positions of the two vacuum hoods are close to each other and face the opening one.

[0005] Preferably, a rotatable bidirectional threaded rod 1 is provided on the ground near one side of the opening 1 and the opening 2, and a moving block 1 is threadedly connected to the two opposite threads of the bidirectional threaded rod 1, and a pushing cylinder is provided on the top of the moving block 1. The pushing cylinder has a telescopic end near the heat dissipation pipe, and the telescopic end is connected to a mounting plate. Two ventilation joints are respectively installed on the top of the two mounting plates, and the pushing cylinder pushes the ventilation joint to connect with the opening 1 or the opening 2.

[0006] Preferably, one end of the bidirectional threaded rod is fixedly connected to the output shaft of the rotating motor, and the other end of the bidirectional threaded rod is rotatably connected to the side plate one, and the rotating motor and the side plate one are both arranged on the ground.

[0007] Preferably, a rotatable bidirectional threaded rod 2 flush with the bidirectional threaded rod 1 is arranged on the ground away from one side of the bidirectional threaded rod 1, and the two opposite threads of the bidirectional threaded rod 2 are both threadedly connected with moving blocks 2, and two exhaust hoods are respectively arranged on the top of the two moving blocks 2.

[0008] Preferably, both ends of the two bidirectional threaded rods are provided with side plates two through a rotating shaft, the side plates two are set on the ground, a driving gear is set on the output shaft of the rotating motor, a driven gear is set on the rotating shaft at one end of the two-way threaded rod two, the driving gear and the driven gear are meshed and connected, when the rotating motor drives the two-way threaded rod one to rotate in one direction, the two-way threaded rod two rotates in the opposite direction.

[0009] Preferably, the mounting plate is vertical, with a transverse through-hole provided on the upper portion of the mounting plate, both ends of the vent joint extending outside the through-hole, the top end of the mounting plate located at the through-hole is longitudinally threadedly connected to a threaded column, and the bottom end of the threaded column extends into the through-hole and is connected to a clamping plate.

[0010] Preferably, the shape of the bottom end of the through hole is adapted to the shape of the vent joint, the shape of the clamping plate is adapted to the shape of the vent joint, and the top end of the threaded column is located above the mounting plate and is connected to a rotating handle.

[0011] Preferably, a wire mesh is fixedly connected to the air inlet by screws.

[0012] Preferably, the heat dissipation pipe is composed of a plurality of transverse parts arranged in sequence, adjacent transverse parts are connected together through longitudinal parts, and reinforcing ribs are distributed between adjacent transverse parts.

[0013] Preferably, the vacuum pump is connected to an exhaust pipe to discharge hot air to the outside, and the compressed air tank is connected to an air compressor to provide compressed air. Beneficial effects of the present invention: The present invention sets two serpentine heat dissipation pipes connected together by reinforcing ribs to form a directional shape, so that the structure is stable, and the serpentine setting allows the compressed air to circulate for a long time; both heat dissipation pipes are provided with opening one and opening two, and the compressed air tank inputs air to the ventilation joint. When the two ventilation joints are close to each other, they are respectively inserted into the opening one of the two heat dissipation pipes to pass compressed air, and the compressed air circulates in the heat dissipation pipes, and the bottom of the sand box located above the heat dissipation pipes is dissipated through the air inlet. A steel wire mesh is set at the air inlet to prevent a large amount of sand from entering the pipe, affecting the ventilation and heat dissipation effect, and finally the compressed air flows out from the opening two, and the temperature of the compressed air flowing out is high, and it is extracted and discharged by the vacuum pump; in this way, the temperature at one end of the opening two will be overheated, and the positions of the two ventilation joints can be moved away from each other, so that the two ventilation joints are inserted into the opening two to pass compressed air for heat dissipation, and the compressed air flowing out flows out from the opening one, and then discharged by the vacuum pump, so that the temperature is uniformly reduced, and the problem of excessively high temperature and poor heat dissipation effect at one end of the heat dissipation pipe is avoided.

[0014] The present invention drives a bidirectional threaded rod to rotate by rotating a rotating motor, thereby causing two moving blocks to move toward or opposite to each other, thereby moving the position of a pushing cylinder, so that the position of a vent joint can be adjusted. When the vent joint is close to opening one, the pushing cylinder drives the vent joint to be inserted into opening one to allow compressed air to pass through. When the vent joint is close to opening two, the pushing cylinder drives the vent joint to be inserted into opening two to allow compressed air to pass through.

[0015] The output shaft of the rotary motor of the present invention is meshedly connected with the driven gear of the two-way threaded rod through the driving gear, so that the rotary motor drives the two-way threaded rod to rotate while driving the two-way threaded rod to rotate in the opposite direction. When the vent joint is close to the opening one, the exhaust hood is close to the opening two; when the vent joint is close to the opening two, the exhaust hood is close to the opening one, so as to adapt to the discharge of stable and high compressed air after the compressed air enters different positions.

[0016] The vent joint of the present invention moves the threaded column downward by rotating the rotating handle, thereby driving the clamping plate to move downward. The clamping plate and the through port clamp the vent joint together to ensure the stability of the vent joint. When the vent joint needs to be disassembled, the threaded column is rotated upward so that the clamping plate does not contact the vent joint and the vent joint can be taken out. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a schematic diagram of a heat dissipation pipeline of the present invention; Figure 2 is a top view of the present invention as a whole; Figure 3 is a side view of the mounting plate of the present invention; Figure 4 It is a schematic diagram of the air inlet of the present invention.

[0019] The markings in the figure are: 1-heat dissipation duct, 2-opening one, 3-opening two, 4-air inlet, 5-compressed air tank, 6-ventilation hose, 7-ventilation joint, 8-exhaust pump, 9-exhaust hose, 10-exhaust hood, 11-two-way threaded rod one, 12-moving block one, 13-pushing cylinder, 14-mounting plate, 15-rotating motor, 16-side plate one, 17-two-way threaded rod two, 18-moving block two, 19-side plate two, 20-driving gear, 21-driven gear, 22-through port, 23-threaded column, 24-clamping plate, 25-rotating handle, 26-wire mesh, 27-reinforcement rib. DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0021] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] like Figures 1 to 4As shown, a device for heat dissipation of a bottom net sand box for casting comprises two serpentine heat dissipation pipes 1 on the ground, the two heat dissipation pipes 1 are connected together by reinforcing ribs 27 to form a square shape; the ends of the two heat dissipation pipes 1 on the side close to each other are opening one 2, and the ends of the two heat dissipation pipes 1 on the side away from each other are opening two 3, and the opening one 2 and the opening two 3 are located on the same side; air inlets 4 are distributed on the top of the heat dissipation pipe 1, and a steel wire mesh 26 is fixedly connected to the air inlet 4 by screws; a compressed air tank 5 is arranged on one side of the opening one 2 and the opening two 3, and the compressed air tank 5 is connected to two movable ventilation joints 7 through two ventilation hoses 6, and the ventilation joints The size of the head 7 is adapted to the opening 1 2 and the opening 2 3, the two ventilation joints 7 correspond to the two heat dissipation pipes 1 respectively, and the positions of the two ventilation joints 7 are close to or far away from each other; two vacuum pumps 8 are also arranged on one side of the opening 1 2 and the opening 2 3, the vacuum pump 8 is connected to a movable vacuum hood 10 through a vacuum hose 9, the two vacuum hoods 10 correspond to the two heat dissipation pipes 1 respectively, and the positions of the two vacuum hoods 10 are close to or far away from each other; when the positions of the two ventilation joints 7 are close to the opening 1 2, the positions of the two vacuum hoods 10 are far away from each other and face the opening 2 3; when the positions of the two ventilation joints 7 are far away from each other and face the opening 2 3, the positions of the two vacuum hoods 10 are close to the opening 1 2. Two serpentine heat dissipation pipes 1 are connected together by reinforcing ribs 27 to form a directional shape, so that the structure is stable, and the serpentine arrangement allows the compressed air to circulate for a long time; the two heat dissipation pipes 1 are both provided with an opening 1 2 and an opening 2 3, and the compressed air tank inputs air to the ventilation joint 7. When the two ventilation joints 7 are close to each other, they are respectively inserted into the opening 1 2 of the two heat dissipation pipes 1 to pass the compressed air. The compressed air circulates in the heat dissipation pipe 1, and the bottom of the sand box located above the heat dissipation pipe 1 is cooled through the air inlet 4. A wire mesh 26 is set at the air inlet 4 to prevent a large amount of sand from entering the pipeline and affecting the ventilation and heat dissipation effect. Finally, the compressed air flows out from the opening 2 3. The temperature of the compressed air flowing out is high and is extracted and discharged by the vacuum pump 8. In this way, the temperature at one end of the opening 2 3 will be overheated, and the positions of the two ventilation joints 7 can be moved away from each other, so that the two ventilation joints 7 are inserted into the opening 2 3 to pass compressed air for heat dissipation, and the outflowing compressed air flows out from the opening 1 2 and is discharged through the vacuum pump 8. In this way, uniform cooling is ensured and the problem of excessive temperature and poor heat dissipation effect at one end of the heat dissipation pipe 1 is avoided.

[0023] A rotatable bidirectional threaded rod 11 is arranged on the ground near one side of the opening 12 and the opening 23, and a moving block 12 is threadedly connected to the two opposite threads of the bidirectional threaded rod 11, and a pushing cylinder 13 is arranged on the top of the moving block 12. The pushing cylinder 13 has a telescopic end near the heat dissipation pipe 1, and a mounting plate 14 is connected to the telescopic end. Two ventilation joints 7 are respectively installed on the top of the two mounting plates 14, and the pushing cylinder 13 pushes the ventilation joint 7 to connect with the opening 12 or the opening 23; one end of the bidirectional threaded rod 11 is fixedly connected to the output shaft of the rotating motor 15, and the other end of the bidirectional threaded rod 11 is rotatably connected to the side plate 16, and the rotating motor 15 and the side plate 16 are both arranged on the ground. The rotating motor 15 is rotated to drive the bidirectional threaded rod 11 to rotate, so that the two moving blocks 12 move toward or oppositely, thereby moving the position of the push cylinder 13, so that the position of the ventilation joint 7 can be adjusted. When the ventilation joint 7 is close to the opening 2, the push cylinder 13 drives the ventilation joint 7 to be inserted into the opening 2 to pass the compressed air. When the ventilation joint 7 is close to the opening 2 3, the push cylinder 13 drives the ventilation joint 7 to be inserted into the opening 2 3 to pass the compressed air.

[0024] Limit sensors are provided at both ends of the two opposite threads of the bidirectional threaded rod 11, and the limit sensors are electrically connected to the controller, and the controller is electrically connected to the rotating motor and the pushing cylinder. When the moving block 12 contacts the limit sensor, the vent joint 7 is aligned with the opening 12 or the opening 23, the controller controls the rotating motor to stop, and starts the pushing cylinder to push the vent joint 7 into the opening 12 or the opening 23.

[0025] A rotatable bidirectional threaded rod 17 flush with the bidirectional threaded rod 11 is arranged on the ground away from one side of the bidirectional threaded rod 11, and a moving block 18 is threadedly connected to the two opposite threads of the bidirectional threaded rod 17, and two exhaust hoods 10 are respectively arranged on the top of the two moving blocks 18; both ends of the bidirectional threaded rod 17 are provided with a side plate 19 rotatably arranged through a rotating shaft, and the side plate 19 is arranged on the ground, a driving gear 20 is arranged on the output shaft of the rotating motor 15, and a driven gear 21 is arranged on the rotating shaft at one end of the bidirectional threaded rod 17, and the driving gear 20 and the driven gear 21 are meshed and connected, and when the rotating motor 15 drives the bidirectional threaded rod 11 to rotate in one direction, the bidirectional threaded rod 17 rotates in the opposite direction. The output shaft of the rotating motor 15 is meshed and connected with the driven gear 21 of the two-way threaded rod 17 through the driving gear 20, so that the rotating motor 15 drives the two-way threaded rod 11 to rotate while driving the two-way threaded rod 17 to rotate in the opposite direction. When the ventilation joint 7 is close to the opening 2, the exhaust hood 10 is close to the opening 3; when the ventilation joint 7 is close to the opening 3, the exhaust hood 10 is close to the opening 2, so as to adapt to the stable and high discharge of compressed air after the compressed air enters different positions.

[0026] Preferably, the mounting plate 14 is vertical, and a through hole 22 is provided on the upper part of the mounting plate 14, and the two ends of the vent joint 7 extend outside the through hole 22. The top of the mounting plate 14 is located at the through hole 22 and is longitudinally threadedly connected with a threaded column 23, and the bottom of the threaded column 23 extends into the through hole 22 and is connected with a clamping plate 24; the shape of the bottom of the through hole 22 is adapted to the shape of the vent joint 7, and the shape of the clamping plate 24 is adapted to the shape of the vent joint 7, and the top of the threaded column 23 is located above the mounting plate 14 and is connected with a rotating handle 25. The threaded column 23 is moved downward by rotating the rotating handle 25, thereby driving the clamping plate 24 to move downward, and the clamping plate 24 and the through hole 22 together clamp the vent joint 7 to ensure the stability of the vent joint 7. When the vent joint 7 needs to be disassembled, the threaded column 23 is rotated upward so that the clamping plate 24 does not contact the vent joint 7, and the vent joint 7 can be taken out.

[0027] The heat dissipation pipe 1 is composed of a plurality of transverse parts arranged in sequence, and adjacent transverse parts are connected together through longitudinal parts. Reinforcing ribs 27 are distributed between adjacent transverse parts, so that the two heat dissipation pipes are combined with higher strength and the sand box can be placed better.

[0028] The vacuum pump 8 is connected to an exhaust pipe to discharge hot air to the outside, and the compressed air tank 5 is connected to an air compressor to provide compressed air.

[0029] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A device for heat dissipation of a bottom screen sand box for casting, comprising two serpentine heat dissipation pipes (1) on the ground, characterized in that: The two heat dissipation pipes (1) are connected together by reinforcing ribs (27) to form a square shape; the ends of the two heat dissipation pipes (1) on the side close to each other are opening one (2), and the ends of the two heat dissipation pipes (1) on the side far away from each other are opening two (3), and opening one (2) and opening two (3) are located on the same side; an air inlet (4) is distributed on the top of the heat dissipation pipe (1); a compressed air tank (5) is provided on one side of the opening one (2) and the opening two (3), and the compressed air tank (5) is connected to two movable ventilation joints (7) through two ventilation hoses (6), and the size of the ventilation joints (7) is adapted to the size of the opening one (2) and the opening two (3), and the two ventilation joints (7) correspond to the respective The two heat dissipation pipes (1) and the two ventilation joints (7) are located close to or far from each other; two vacuum pumps (8) are also arranged on one side of the opening one (2) and the opening two (3); the vacuum pumps (8) are connected to a movable vacuum hood (10) via a vacuum hose (9); the two vacuum hoods (10) correspond to the two heat dissipation pipes (1) respectively, and the two vacuum hoods (10) are located close to or far from each other; when the two ventilation joints (7) are located close to and aligned with the opening one (2), the two vacuum hoods (10) are located far from each other and aligned with the opening two (3); when the two ventilation joints (7) are located far from each other and aligned with the opening two (3), the two vacuum hoods (10) are located close to and aligned with the opening one (2).

2. A device for dissipating heat from a bottom screen sand box for casting as claimed in claim 1, characterized in that: A rotatable bidirectional threaded rod (11) is arranged on the ground near one side of the opening (2) and the opening (3); two opposite threads of the bidirectional threaded rod (11) are both threadedly connected to a moving block (12); a pushing cylinder (13) is arranged on the top of the moving block (12); a telescopic end of the pushing cylinder (13) near the heat dissipation pipe (1) is connected to a mounting plate (14); two ventilation joints (7) are respectively mounted on the top of the two mounting plates (14); the pushing cylinder (13) pushes the ventilation joint (7) to connect with the opening (2) or the opening (3).

3. A device for dissipating heat from a bottom screen sand box for casting as claimed in claim 2, characterized in that: One end of the bidirectional threaded rod (11) is fixedly connected to the output shaft of the rotating motor (15), and the other end of the bidirectional threaded rod (11) is rotatably connected to the side plate (16). The rotating motor (15) and the side plate (16) are both arranged on the ground.

4. A device for dissipating heat from a bottom screen sand box for casting as claimed in claim 3, characterized in that: A rotatable bidirectional threaded rod 2 (17) is arranged on the ground away from one side of the bidirectional threaded rod 1 (11) and flush with the bidirectional threaded rod 1. The two opposite threads of the bidirectional threaded rod 2 (17) are both threadedly connected to a moving block 2 (18). The two exhaust hoods (10) are respectively arranged on the top of the two moving blocks 2 (18).

5. A device for dissipating heat from a bottom screen sand box for casting as claimed in claim 4, characterized in that: Both ends of the bidirectional threaded rod (17) are provided with a side plate (19) which is rotatably arranged via a rotating shaft. The side plate (19) is arranged on the ground. A driving gear (20) is arranged on the output shaft of the rotating motor (15). A driven gear (21) is arranged on the rotating shaft at one end of the bidirectional threaded rod (17). The driving gear (20) and the driven gear (21) are meshingly connected. When the rotating motor (15) drives the bidirectional threaded rod (11) to rotate in one direction, the bidirectional threaded rod (17) rotates in the opposite direction.

6. A device for dissipating heat from a bottom screen sand box for casting as claimed in claim 2, characterized in that: The mounting plate (14) is vertical, and a through hole (22) is arranged on the upper part of the mounting plate (14). Both ends of the vent joint (7) extend outside the through hole (22). The top end of the mounting plate (14) is located at the through hole (22) and is longitudinally threadedly connected to a threaded column (23). The bottom end of the threaded column (23) extends into the through hole (22) and is connected to a clamping plate (24).

7. A device for dissipating heat from a bottom screen sand box for casting as claimed in claim 6, characterized in that: The shape of the bottom end of the through hole (22) is adapted to the shape of the vent joint (7), the shape of the clamping plate (24) is adapted to the shape of the vent joint (7), and the top end of the threaded column (23) is located above the mounting plate (14) and is connected to a rotating handle (25).

8. A device for dissipating heat from a bottom screen sand box for casting as claimed in claim 1, characterized in that: The air inlet (4) is fixedly connected with a steel wire mesh (26) by means of screws.

9. A device for dissipating heat from a bottom screen sand box for casting as claimed in claim 1, characterized in that: The heat dissipation pipe (1) is composed of a plurality of sequentially arranged transverse parts, adjacent transverse parts are connected together via longitudinal parts, and reinforcing ribs (27) are distributed between adjacent transverse parts.

10. A device for dissipating heat from a bottom screen sand box for casting as claimed in claim 1, characterized in that: The vacuum pump (8) is connected to an exhaust pipe to discharge hot air to the outside, and the compressed air tank (5) is connected to an air compressor to provide compressed air.

Images