CN111132775B - Humidifying device and humidifying method for core making machine - Google Patents
Humidifying device and humidifying method for core making machine Download PDFInfo
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- CN111132775B CN111132775B CN201880044573.0A CN201880044573A CN111132775B CN 111132775 B CN111132775 B CN 111132775B CN 201880044573 A CN201880044573 A CN 201880044573A CN 111132775 B CN111132775 B CN 111132775B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C19/00—Components or accessories for moulding machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/08—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sprinkling, cooling, or drying
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Abstract
A humidifying device and a humidifying method for a core making machine are used for moisturizing or humidifying one or more areas in a core sand mixing device, a conveying device, a storage device and a sand shooting device of the core making machine, and the humidifying device comprises a humidifying device, a control device and a humidifying pipeline (4) for communicating the humidifying device with the area to be moisturized or humidified, and is characterized in that: the humidifying device mainly comprises a water tank (2), a water inlet valve (10) and atomizing devices with the same number as that of areas to be humidified or humidified; each atomizing device has a cage fog chamber (3) of a vertical setting, and cage fog chamber (3) bottom is equipped with export ascending nozzle (5), and cage fog chamber (3) top intercommunication humidification pipeline (4), nozzle (5) are connected with and absorb water pipe (6) and intake pipe (7), and the water inlet that absorbs water pipe (6) is located water tank (2), and compressed air source is connected through pneumatic valve (8) in intake pipe (7), and the size and the minimum dispersion district cooperation of nozzle (5) spun in cage fog chamber (3). The invention is convenient to control and can ensure the transportation of mist, the dispersivity of the output water mist particles is uniform, the flow velocity is stable, and the humidity is easy to control; simple structure is reliable, and is fit for abominable operational environment.
Description
Technical Field
The invention relates to preparation of a sand core for metal casting, in particular to a humidifying device and a humidifying method for a core making machine.
Background
The inorganic binder core making process is an important composition technology in the existing green casting link, the main content is to carry out sand core curing core making by utilizing the dehydration and curing principle of the inorganic binder, no harmful waste gas is discharged in the whole core making process, and the pollution discharge amount can be reduced by more than 90 percent compared with the conventional cold core process. Therefore, the inorganic core making process is a currently preferred core making method.
However, in the process of mixing, conveying and waiting for sand shooting, the core sand in the inorganic core making process becomes dry or crusts due to moisture escaping, so that the related environment in which the core sand is stored needs to be ensured to have certain humidity, and the core sand is prevented from being dehydrated and solidified in advance due to low environmental humidity, so that the normal operation of sand shooting and core making is not influenced.
Therefore, a humidifying device for moisturizing all spaces with storage core sand is needed on core making equipment matched with an inorganic process. In the prior art, one method is to arrange nozzles in an area to be humidified, and spray water through the nozzles to improve the environmental humidity. However, the fog formation of the nozzle has a certain action area range, and the direct spraying has the problems of high speed, too large water fog amount, too wide spraying area and uneven size of the fogging particles, so that the humidity of the core sand is difficult to control, and the core making effect is influenced.
Chinese patent CN101304828A discloses a method and apparatus for manufacturing molds or cores, particularly for foundries, where water is atomized by means of ultrasonic waves into buoyant gaseous aerosols, which are transported by means of a blower to an ejection outlet area, a sand ejection unit, a sand ejection head via a distribution line. Chinese patent application CN102869464A discloses a method and apparatus for keeping warm the mould material to be processed when making moulds or cores, using ultrasonic atomization to humidify and moisturize the mixing area, the conveying means and the sand storage unit.
According to the technical scheme, the size of the water mist particles is controlled by ultrasonic atomization, and the water mist is conveyed by the distribution pipeline, so that the water mist is easy to control. However, in the actual use process, the following defects exist: (1) the ultrasonic generator is a precise electrical element and needs to be provided with a power supply module, but the use environment of the casting equipment is severe, so that the ultrasonic device is easy to lose efficacy and damage; (2) the ultrasonic atomization is in a dispersed state, and because the actual humidification is in multipoint arrangement, a fan needs to be arranged, and a valve needs to be arranged on each pipeline to realize the switch of mist output; (3) the control requirement of the ultrasonic fogging on the water level is very high, and the fogging effect can be influenced by too high and too low of the ultrasonic fogging.
Therefore, a new humidifying device needs to be provided to adapt to the working environment of the core making machine and ensure the humidifying effect.
Disclosure of Invention
The invention aims to provide a humidifying device for a core making machine, which can realize uniform and controllable humidification of the area where core sand is located on the premise of not using electrical control equipment so as to meet the requirements of severe working environment; another object of the present invention is to provide a humidifying method for core making machines.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: a humidifying device for a core making machine is used for moisturizing or humidifying one or more areas in a core sand mixing device, a conveying device, a storage device and a sand shooting device of the core making machine and comprises a humidifying device, a control device and a humidifying pipeline for communicating the humidifying device with the areas to be moisturized or humidified, wherein the humidifying device mainly comprises a water tank, a water inlet valve and atomizing devices with the same number as the areas to be moisturized or humidified; each atomizing device has the cage fog chamber of a vertical setting, cage fog chamber bottom is equipped with the ascending nozzle of export, cage fog chamber top intercommunication the humidification pipeline, the nozzle is connected with and absorbs water pipe and intake pipe, the water inlet that absorbs water the pipe is located the water tank, the intake pipe is connected the compressed air supply through the pneumatic valve, the size in cage fog chamber and the minimum dispersion district cooperation of nozzle spun.
Among the above-mentioned technical scheme, through setting up the cage fog chamber for the water smoke that the nozzle throws reaches required dispersion distance and size, has guaranteed the even atomizing of water smoke, and rethread humidification pipeline carries, makes the fog accord with the demand of treating the humidification region.
According to the further technical scheme, the bottom end of the cage fog cavity is open, the bottom of the cage fog cavity is immersed in water in the water tank, and the bottom end opening is closed by the water in the water tank. On one hand, mist which cannot enter the humidifying pipeline can be converged into water drops on the inner wall of the cage mist cavity and fall back to the water tank for recycling; on the other hand, the opening is closed by the water in the water tank, so that the mist can only move towards the humidifying pipeline under the action of the pressure difference.
According to the preferable technical scheme, the water inlet of the water suction pipe is far away from the bottom end opening of the cage fog cavity, so that the influence of water fluctuation in the water suction process on the cage fog cavity is avoided. A portion of the suction pipe may be disposed outside the water tank for installation of the filtering device and maintenance.
In a preferable technical scheme, the cage fog cavity is a sealed cavity (such as a cavity with a circular or square cross section), the height of the cage fog cavity is not less than 20cm, and the minimum size of an inner cavity is not less than 10 cm. The technical scheme is that the device is provided with a program controller, a humidity sensor is arranged in each area to be moisturized or humidified, a liquid level sensor is arranged in a water tank, and the output of the humidity sensor and the output of the liquid level sensor are connected to an input port of the program controller; and a plurality of output ports of the program controller are respectively connected with the air valve of each atomization device and the control end on the water inlet valve of the water tank.
When humidification is needed, an air valve of the corresponding atomizing device is opened, compressed air enters the nozzle through the air inlet pipe, the water suction pipe is driven to suck water, the water is impacted and mixed through the nozzle opening to form mist, the mist is dispersed in the cage mist cavity to form uniform water mist, and the water mist enters an area to be moisturized or humidified through the humidifying pipeline driven by the compressed air.
In the technical scheme, a program controller is arranged to receive a humidity signal of an area to be moisturized or humidified, and when the humidity is lower than a set lower limit, the program controller controls a corresponding atomization device to open an air valve to start atomization and humidification operation; when the humidity reaches the set upper limit, the program controller controls to close the air valve to finish the humidification.
In the technical scheme, a program controller is arranged to receive a liquid level signal in a water tank, and when the liquid level is lower than the lower limit of the liquid level, a water inlet valve is opened to feed water; when the liquid level reaches the upper limit of the liquid level, closing the water inlet valve; the lower limit of the liquid level is higher than the opening position of the bottom end of the cage fog cavity.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the invention utilizes the atomizing nozzle to form mist by gas and liquid, and combines the cage mist cavity and the humidifying pipeline to form independent automatic humidifying systems, and a valve is not required to be arranged in the mist pipeline, thereby being convenient for control and ensuring the delivery of the mist;
2. by arranging the cage mist cavity, the output water mist particles are uniform in dispersibility, stable in flow speed and easy to control in humidity;
3. the invention adopts the aerial fog nozzle, does not need to be provided with an electric fog forming device or an air supply device, has simple and reliable structure and is suitable for severe working environment.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Wherein: 1. A support; 2. a water tank; 3. a cage fog chamber; 4. a humidifying pipeline; 5. a nozzle; 6. a suction pipe; 7. an air inlet pipe; 8. an air valve; 9. a program controller; 10. a water inlet valve; 11. a storage core sand chamber; 12. a humidity sensor; 13. a liquid level sensor.
Detailed Description
The invention is further described with reference to the following figures and examples:
the first embodiment is as follows: referring to fig. 1, the humidifying device for the core making machine is used for moisturizing or humidifying one or more areas of a core sand mixing device, a conveying device, a storage device and a sand shooting device of the core making machine, a water tank 2 is arranged on a support 1, 3 areas to be moisturized or humidified are drawn in the humidifying device, core sand is arranged in each area, and an outlet of a humidifying pipeline 4 is correspondingly arranged; correspond every and treat moisturizing or humidification region, be provided with atomizing device respectively, each atomizing device has the cage fog chamber 3 of a vertical setting, cage fog chamber 3 has a cylindrical barrel, atomizing device adopts the section view mode to indicate rightmost in the picture, it is visible, 3 bottom openings in cage fog chamber, the opening is located under the water liquid level in the water tank, 3 tops in cage fog chamber and humidification pipeline 4 intercommunication, the junction periphery is sealed, it is equipped with ascending nozzle 5 to aim at 3 bottom openings in cage fog chamber, nozzle exit is located on the water liquid level, nozzle 5 is connected with and absorbs water pipe 6 and intake pipe 7, the water inlet that absorbs water pipe 6 is located the water tank, intake pipe 7 connects the compressed air source through pneumatic valve 8.
In the embodiment, a humidifying loop is formed by an air valve 8, a nozzle 5, a cage fog cavity 3 and a humidifying pipeline 4, the humidifying pipeline 4 is communicated to a storage core sand cavity 11, and a humidity sensor 12 is arranged in the storage core sand cavity 11.
In the control system of this embodiment, the program controller 9 may be implemented by a PLC, and correspondingly receives signals from the sensors, and controls the corresponding valves to open and close.
When the humidity sensor 12 detects that the humidity in the storage core sand cavity 11 is lower than a set requirement, the program controller 9 outputs a signal for opening the air valve 8 of a corresponding loop, so that compressed air enters the nozzle 5 through the air inlet pipe 7, and water is sucked by the water suction pipe 6 through the structure of the nozzle 5 to spray water mist;
the nozzle 5 is misted by impingement mixing of a path of compressed air (pressure >1 bar) and a path of aqueous liquid; the compressed air is input from the outside, and the water liquid is clear water taken from the water tank 2;
the size of the cage fog cavity 3 needs to be defined according to the size and the characteristics of the fog forming shape of the nozzle 5, the height of the cage fog cavity needs to meet the minimum dispersion area distance projected by the nozzle, generally, the distance needs to be more than 20cm, and the width of the cage fog cavity needs to be more than 10 cm. The minimum dispersion zone formed by the nozzle is shown in the figure. The top in cage fog chamber is connected the humidification pipeline, and the nozzle setting needs to form the bottom surface below the clear water liquid level in the water tank and seals at the bottom in cage fog chamber, and it is sealed to make fog only can move to the humidification pipeline end under the effect of pressure differential. The mist sprayed by the nozzle is moved out towards the humidifying pipeline end under the action of the cage mist cavity, so that the water mist with uniform mist dispersion in the middle is finally delivered to the output end of the pipeline to store the core sand cavity; because the even dispersion particle size of the water smoke that gets into the humidification pipeline is little to under the effect of long pipeline, its velocity of motion is also very slow, accords with the effect that finally gets into the required water smoke of storage core sand chamber.
The mist sprayed by the nozzle but not entering the humidifying pipeline can continuously impact on the inner wall of the cage mist cavity, and is collected into water drops which fall back into the clear water liquid without loss; the liquid level in the water tank is detected by a liquid level sensor, and when the liquid level is detected to be low, the program controller controls the water inlet valve to open to supplement water to a high liquid level.
Through the scheme, the humidifying operation of the required core sand storage area is realized on the premise that no electric equipment is needed, and the humidifying uniformity is ensured.
Claims (8)
1. The utility model provides a humidification device for core making machine for one or more regional moisturizing or humidification among core sand mixing arrangement, conveyor, storage device and the sand shooting device of core making machine, includes humidification device, controlling means and intercommunication humidification device and the regional humidification pipeline of waiting to moisturize or humidifying, its characterized in that: the humidifying device mainly comprises a water tank, a water inlet valve and atomizing devices with the same number as the areas to be humidified or humidified; each atomizing device has the cage fog chamber of a vertical setting, cage fog chamber bottom is equipped with the ascending nozzle of export, cage fog chamber top intercommunication the humidification pipeline, the nozzle is connected with and absorbs water pipe and intake pipe, the water inlet that absorbs water the pipe is located the water tank, the intake pipe is connected the compressed air supply through the pneumatic valve, the size in cage fog chamber and the minimum dispersion district cooperation of nozzle spun.
2. A humidification device for a core making machine as claimed in claim 1, characterized in that: the bottom end of the cage fog cavity is open, the bottom of the cage fog cavity is immersed in water in the water tank, and the bottom end opening is closed by the water in the water tank.
3. A humidification device for a core making machine as claimed in claim 2, characterized in that: and a water inlet of the water suction pipe is far away from the bottom opening of the cage fog cavity.
4. A humidification device for a core making machine as claimed in claim 1, characterized in that: the cage fog cavity is a sealed cavity, the height of the cage fog cavity is not less than 20cm, and the minimum size of the inner cavity is not less than 10 cm.
5. A humidification device for a core making machine as claimed in claim 1, characterized in that: the device is provided with a program controller, a humidity sensor is arranged in each area to be moisturized or humidified, a liquid level sensor is arranged in a water tank, and the output of the humidity sensor and the output of the liquid level sensor are connected to an input port of the program controller; and a plurality of output ports of the program controller are respectively connected with the air valve of each atomization device and the control end on the water inlet valve of the water tank.
6. A humidifying method for a core making machine, characterized by: the humidification device is realized by adopting any one of the humidifying devices of claims 1 to 5, when humidification is needed, the air valve of the corresponding atomization device is opened, compressed air enters the nozzle through the air inlet pipe, the water suction pipe is driven to suck water, the water is impacted and mixed into mist through the nozzle opening, the mist is dispersed in the cage mist cavity to form uniform water mist, and the water mist enters an area to be humidified or humidified through the humidification pipeline under the drive of the compressed air.
7. A humidification method for a core making machine as claimed in claim 6, characterized in that: setting a program controller to receive a humidity signal of an area to be moisturized or humidified, and controlling a corresponding atomization device to open an air valve to start atomization and humidification operation when the humidity is lower than a set lower limit; when the humidity reaches the set upper limit, the program controller controls to close the air valve to finish the humidification.
8. A humidification method for a core making machine as claimed in claim 6, characterized in that: setting a program controller to receive a liquid level signal in the water tank, and opening a water inlet valve to feed water when the liquid level is lower than the lower limit of the liquid level; when the liquid level reaches the upper limit of the liquid level, closing the water inlet valve; the lower limit of the liquid level is higher than the opening position of the bottom end of the cage fog cavity.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/114671 WO2020093337A1 (en) | 2018-11-08 | 2018-11-08 | Humidification device and humidification method used for core-manufacturing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111132775A CN111132775A (en) | 2020-05-08 |
| CN111132775B true CN111132775B (en) | 2022-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201880044573.0A Active CN111132775B (en) | 2018-11-08 | 2018-11-08 | Humidifying device and humidifying method for core making machine |
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| CN (1) | CN111132775B (en) |
| WO (1) | WO2020093337A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112974736A (en) * | 2021-02-08 | 2021-06-18 | 苏州明志科技股份有限公司 | Moisturizing device and moisturizing method |
| CN114042861B (en) * | 2021-11-12 | 2024-05-28 | 洛阳理工学院 | Method for manufacturing frozen casting mold |
| CN114985675A (en) * | 2022-06-14 | 2022-09-02 | 苏州明志科技股份有限公司 | Reaction device for recycling inorganic core sand water supplement and recycling method |
| CN115039678B (en) * | 2022-06-23 | 2023-12-01 | 霍山步町园艺有限公司 | Atomization humidification effect control system of ecological bonsai |
| CN116099096B (en) * | 2023-02-20 | 2023-08-18 | 扬州大学 | Prevent respiratory oxygen humidification equipment of refluence |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN111132775A (en) | 2020-05-08 |
| WO2020093337A1 (en) | 2020-05-14 |
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