CN214263855U

CN214263855U - Special casting device for aluminum liquid casting and wrapping multi-path copper coil

Info

Publication number: CN214263855U
Application number: CN202120315225.1U
Authority: CN
Inventors: 朱文坛
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2021-09-24
Anticipated expiration: 2031-02-04

Abstract

The utility model discloses a special casting device for a multi-path copper coil wrapped by molten aluminum casting; belongs to the technical field of copper tube evaporator casting tools; the technical scheme includes that the casting mold is provided with through holes matched with connectors at two ends of a copper coil pipe, the outer diameters of the connectors at the two ends of the copper coil pipe are matched with the inner diameter of the through holes, fastening nuts are connected to the connectors at the outer sides of the through holes in a threaded mode, and the connectors are fixed in the corresponding through holes through the fastening nuts; the connectors at the two ends of the copper coil pipe are respectively connected with a pressure-adjustable circulating cooling system through quick connectors; the utility model aims to provide a special casting device for wrapping a plurality of copper coil pipes by casting molten aluminum, which has compact structure, convenient use and good effect; the method is used for casting the copper coil pipe by using aluminum liquid.

Description

Special casting device for aluminum liquid casting and wrapping multi-path copper coil

Technical Field

The utility model relates to a casting frock, more specifically say, especially relate to a special casting device of aluminium liquid casting parcel multichannel copper coil pipe.

Background

The existing copper-aluminum composite process mainly comprises brazing; patch and screw locking; plugging copper and embedding copper; forging process (cold forging); gear shaping Crimped Fin technology. The hot casting technology is not available, because when the molten aluminum at the temperature of 660-720 ℃ is cast on the copper pipe, hydrogen can be generated inside and on the surface of the copper pipe at the temperature of more than or equal to 370 ℃, so that the copper pipe is cracked, and the casting can not be successful.

When copper is heated in reducing atmosphere containing hydrogen or carbon monoxide (not less than 370 ℃), hydrogen H₂Or cuprous oxide (Cu) in which carbon monoxide (CO) is liable to form grain boundaries₂O) to generate high-pressure steam or carbon dioxide gas to crack copper. This phenomenon is often referred to as copper's "hydrogen disease".

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art, and provides a special casting device for aluminum liquid casting and wrapping multi-path copper coil pipes, which has compact structure, convenient use and good effect.

The technical scheme of the utility model is realized like this: a special casting device based on the method for casting and wrapping the multi-path copper coil pipes by using the aluminum liquid comprises a casting die, wherein the casting die is provided with through holes matched with connectors at two ends of the copper coil pipes, the outer diameters of the connectors at the two ends of the copper coil pipes are matched with the inner diameter of the through holes, fastening nuts are in threaded connection with the connectors at the outer sides of the through holes, and the connectors are fixed in the corresponding through holes through the fastening nuts; the connectors at the two ends of the copper coil pipe are respectively connected with a pressure-adjustable circulating cooling system through quick connectors.

In the above-mentioned special casting device, the casting mold comprises a bottom plate fixed on the external support, a limiting boss adapted to the outer contour of the product to be molded is arranged on the bottom plate, a plurality of side plates which are vertically arranged and detachably connected are attached to the outer wall of the limiting boss, and the through hole is formed in one of the side plates.

In the above special casting device, the pressure-adjustable circulating cooling system includes a condensation recovery tower, and the water storage chamber at the bottom of the condensation recovery tower is conductively connected with an adjustable high-pressure water pump through a connecting pipe; the air inlet end of the condensation recovery tower is in conduction connection with a quick connector at the connector at one end of the copper coil pipe through an air outlet pipe, and the water outlet end of the adjustable high-pressure water pump is in conduction connection with a quick connector at the other end of the copper coil pipe through an water inlet pipe.

In the above-mentioned special casting device, a water thermometer is arranged on the connecting pipe, a steam thermometer is arranged on the air outlet pipe, and a glass rotor flow regulator and a pressure gauge are sequentially arranged on the water inlet pipe along the water flow direction.

After the structure is adopted in the utility model, through adjustable circulative cooling system to intraductal injection recirculated cooling water of copper coil, "hydrogen disease" leads to cracked technique preparation finished product fast, simple, with low costs, environmental protection and energy saving and long service life etc. because of water-cooling cycle when adopting the water-cooling to solve aluminium liquid casting copper pipe, the top efficiency that extensively is used for industry, electron trade and civilian needs absorbs heat fast, exothermic and indirect heating equipment, metalology and metal technology. Meanwhile, the connector is matched with the fastening nut on the connector, so that the situation that molten aluminum leaks out is guaranteed during casting, and the casting quality is guaranteed.

Drawings

The present invention will be described in further detail with reference to the following examples, which are not intended to limit the invention.

FIG. 1 is a schematic structural diagram of the device of the present invention;

FIG. 2 is a side view schematic of a casting mold;

fig. 3 is a schematic top view of the casting mold.

In the figure: 1. casting a mould; 1a, a bottom plate; 1b, a limiting boss; 1c, side plates; 2. a through hole; 3. fastening a nut; 4. a quick coupling; 5. a pressure adjustable circulating cooling system; 5a, a condensation recovery tower; 5b, a connecting pipe; 5c, an adjustable high-pressure water pump; 5d, an air outlet pipe; 5e, a water inlet pipe; 6. a water thermometer; 7. a vapor thermometer; 8. a glass rotor flow regulator; 9. and a pressure gauge.

Detailed Description

Referring to fig. 1 to 3, the utility model discloses a special casting device based on the above-mentioned method of wrapping up multichannel copper coil pipe by aluminum liquid casting, including casting die 1, casting die 1 is provided with through-hole 2 that matches with the connector at copper coil pipe both ends, and the external diameter of the connector at copper coil pipe both ends suits with the internal diameter of through-hole 2, and threaded connection has fastening nut 3 on the connector that is located the outside of through-hole 2, and the connector is fixed in corresponding through-hole 2 through fastening nut 3; the connectors at the two ends of the copper coil pipe are respectively connected with a pressure-adjustable circulating cooling system 5 through quick connectors 4.

Preferably, the casting mold 1 comprises a bottom plate 1a fixed on an external support, a limiting boss 1b adapted to the outer contour of a product to be molded is arranged on the bottom plate 1a, a plurality of side plates 1c which are vertically arranged and detachably connected are attached to the outer wall of the limiting boss 1b, and the through hole 2 is formed in one side plate 1 c.

Preferably, the pressure-adjustable circulating cooling system 5 comprises a condensation recovery tower 5a, and a water storage chamber at the bottom of the condensation recovery tower 5a is in conduction connection with an adjustable high-pressure water pump 5c through a connecting pipe 5 b; the air inlet end of the condensation recovery tower 5a is in conduction connection with the quick connector 4 at the connector at one end of the copper coil pipe through an air outlet pipe 5d, and the water outlet end of the adjustable high-pressure water pump 5c is in conduction connection with the quick connector 4 at the connector at the other end of the copper coil pipe through a water inlet pipe 5 e.

Further, for visually observing key parameters such as water pressure, water temperature and steam temperature during casting in real time, a water thermometer 6 is arranged on the connecting pipe 5b, a steam thermometer 7 is arranged on the air outlet pipe 5d, and a glass rotor flow regulator 8 and a pressure gauge 9 are sequentially arranged on the water inlet pipe 5e along the water flow direction.

The device of the utility model can adopt automatic casting and manual casting. And during automatic casting, relevant detection components and execution components, such as an adjustable high-pressure water pump, a water thermometer, a steam thermometer, a glass rotor flow regulator and a pressure gauge, are arranged. It is also easy for those skilled in the art to replace the relevant models which are conventional in the art and can be connected with the control terminal (a PLC or a singlechip, etc. which is conventional in the art) to output signals or receive signals.

The casting method comprises the following steps:

(1) and bending copper coil pipes in various shapes according to the pipe diameter and the number of the required round pipes or special pipes, wherein the adjacent gap of the copper coil pipes is not less than 5mm, and stainless steel or copper joints are brazed at two ends of the copper coil pipes. The caliber of a brazed joint requires that the caliber of an outlet is larger than or equal to that of an inlet, otherwise, excessive internal pressure can occur, and the instantaneous water shortage and temperature rise are caused to generate hydrogen, so that the copper pipe is cracked.

And after brazing, the whole body is immersed into an oxidation-removing bright liquid for 1-3 minutes, and the effect of the oxidation-removing bright liquid is to remove oxides remained on the surface welding, so that the heat conductivity (401W/MK) of the welding port of the copper pipe and the surface of the copper pipe is optimal. After the copper pipe is soaked and the water is taken out, heating, dehumidifying and air-drying are carried out, so that the phenomenon that steam is generated during casting to cause a gap between the surface of the copper pipe and the aluminum liquid is avoided, and the copper coil pipe is obtained.

The prefabricated copper coil pipe is arranged in a casting mould, one end of the copper coil pipe outside the casting mould is connected with a high-pressure water source through a joint, when the inner diameter of the copper coil pipe is 1-3mm, the water pressure in a high-pressure water source output pipe is 2-5MPa, the water flow in the copper coil pipe is 200-850ml/min, the smaller the water pressure is, the larger the water flow is, and when the water pressure takes a lower limit value, the upper limit value is taken; when the inner diameter of the copper coil pipe is 3-6mm, the water pressure in the high-pressure water source output pipe is 1.5-2MPa, the water flow in the copper coil pipe is 850-; when the inner diameter of the copper coil is 6-20mm, the water pressure in the high-pressure water source output pipe is 1.3-1.5MPa, the water flow in the copper coil is 3650 and 8250ml/min, the smaller the water pressure is, the larger the water flow is, and when the water pressure takes the lower limit value, the upper limit value is taken; and (5) standby.

(2) Heating the smelting furnace, adding the aluminum material into the smelting furnace, continuously heating to melt the aluminum material into aluminum liquid, pouring aluminum liquid deslagging and degassing powder into the smelting furnace when the temperature of the smelting furnace rises to 660-doped 680 ℃, uniformly stirring, continuously heating, and fishing out the aluminum slag when the temperature rises to 690-doped 720 ℃ to obtain the aluminum liquid. The dosage of the deslagging and degassing powder of the aluminum liquid is 0.1-0.4 percent of the capacity of the aluminum liquid. The deslagging and degassing of the aluminum liquid is the prior art, and the conventional deslagging and degassing of the aluminum liquid can be adopted, so that the process is not repeated. The deslagging and degassing powder of the aluminum liquid has the function of separating residues and partial hydrogen H in the aluminum liquid₂And the purity of the aluminum liquid is improved, so that the surface of the cast aluminum product is smooth and has no air holes, white spots and scales, and the specific heat coefficient (0.88X 103J/KG ℃) is optimal.

(3) Starting a high-pressure water source and keeping the output of high-pressure water, pouring molten aluminum into a casting mold when the high-pressure water flows out of the other end of the copper coil, wherein the pouring time is 6-10 seconds, the high-pressure water in the copper coil is instantly gasified and sprayed out, and the casting is finished when the water output from the copper coil is changed from high-pressure steam into high-pressure liquid water.

During operation, the copper coil pipe brazes the connector and is connected with the casting die utensil, but the connector is connected pressure regulating circulative cooling system, start-up system, treat that water pressure is stable in the copper coil pipe after, the good aluminium liquid of smelting injects the casting die utensil in 6-10 seconds, high-pressure rivers cool off to below 370 ℃ rapidly when inside the high temperature copper pipe, make it can not take place the hydrogen reaction, play heat absorption, cooling and guard action to the copper pipe in the twinkling of an eye, make the copper pipe can not take place to warp, break and rotten, the copper pipe is heated and makes the inside water of rivers pipe gasify in the twinkling of an eye and get into the condensation recovery tower, vapor is through recovery cyclic utilization behind the condensation. When the water amount in the water storage chamber at the bottom of the condensation recovery tower is not enough, tap water is supplemented through an external pipeline. The whole process realizes zero sewage discharge. When the water at the water outlet is changed into liquid state from gasification, the cooling work inside the copper pipe is completed, and thus the copper pipe casting is successfully cast by the aluminum liquid. The aluminum-copper casting is dissected through experiments, the surface of the copper pipe in the aluminum casting is bright as new, the copper-aluminum joint is seamlessly and fully bonded, and the appearance of the aluminum casting is smooth and regular.

The above embodiment is the preferred embodiment of the present invention, which is only used to facilitate the explanation of the present invention, it is not right to the present invention, which makes the restriction on any form, and any person who knows commonly in the technical field can use the present invention to make the equivalent embodiment of local change or modification without departing from the technical features of the present invention.

Claims

1. A special casting device for wrapping a plurality of paths of copper coil pipes by casting aluminum liquid comprises a casting mold (1), and is characterized in that through holes (2) matched with connectors at two ends of the copper coil pipes are formed in the casting mold (1), the outer diameters of the connectors at two ends of the copper coil pipes are matched with the inner diameters of the through holes (2), fastening nuts (3) are in threaded connection with the connectors at the outer sides of the through holes (2), and the connectors are fixed in the corresponding through holes (2) through the fastening nuts (3); the connectors at the two ends of the copper coil pipe are respectively connected with a pressure-adjustable circulating cooling system (5) through quick connectors (4).

2. A special casting device as in claim 1, wherein the casting mold (1) comprises a bottom plate (1a) fixed on an external support, a limiting boss (1b) corresponding to the outer contour of the product to be formed is arranged on the bottom plate (1a), a plurality of side plates (1c) which are vertically arranged and detachably connected are attached to the outer wall of the limiting boss (1b), and the through hole (2) is formed in one of the side plates (1 c).

3. A special casting device as claimed in claim 1, wherein the pressure-adjustable circulating cooling system (5) comprises a condensation recovery tower (5a), and an adjustable high-pressure water pump (5c) is connected to a water storage chamber at the bottom of the condensation recovery tower (5a) in a conduction manner through a connecting pipe (5 b); the air inlet end of the condensation recovery tower (5a) is in conduction connection with a quick connector (4) at the connector at one end of the copper coil pipe through an air outlet pipe (5d), and the water outlet end of the adjustable high-pressure water pump (5c) is in conduction connection with the quick connector (4) at the connector at the other end of the copper coil pipe through an water inlet pipe (5 e).

4. A special casting device as in claim 3, wherein a water thermometer (6) is arranged on the connecting pipe (5b), a steam thermometer (7) is arranged on the outlet pipe (5d), and a glass rotor flow regulator (8) and a pressure gauge (9) are arranged in sequence on the inlet pipe (5e) along the water flow direction.