CN207267024U

CN207267024U - A kind of heating inductor for U-tube sand casting

Info

Publication number: CN207267024U
Application number: CN201721237612.8U
Authority: CN
Inventors: 韩毅; 肖瑶
Original assignee: Yanshan University
Current assignee: Yanshan University
Priority date: 2017-09-26
Filing date: 2017-09-26
Publication date: 2018-04-24
Anticipated expiration: 2027-09-26

Abstract

The utility model discloses a kind of heating inductor for U-tube sand casting, mainly include positive electrode interface, negative electrode interface, water inlet pipe, outlet pipe, induction coil, coil positioning sleeve, induction coil half-turn is looped around around the metal casting liquid of U-tube semicircle pipe bent position, its both sides is positioned on sandbox lower box by coil positioning sleeve, it is fixed using bolt-connection, the top of induction coil both sides connects positive electrode interface and negative electrode interface respectively, and water inlet pipe and outlet pipe is respectively welded at induction coil both ends.Usefulness：First, liquid condition of the metal casting liquid before U-tube casting is complete is maintained using induction coil heating, generation phenomena such as sprue gate quantity and deformation, crackle when reducing sand casting；Second, sensor structure is simple, easily manufactured, is easily installed dismounting, and cost is low, is suitable for popularization.

Description

A kind of heating inductor for U-tube sand casting

Technical field

The utility model device is a kind of novel casting heating unit, particularly a kind of adding for U shape pipe sand casting Thermal sensor.

Background technology

Major diameter U-tube can be subject to the pressure, temperature, flow velocity for transporting fluid or gas in the use that actual production is lived Etc. the influence of various complicated factors, changeable load is born, to ensure the security of U-tube military service, the preparation to U-tube manufacture Technique and performance requirement are higher.Since the Modeling Material used in sand casting is cheap and easy to get, Casting mold manufacturing is easy, to various casting It is adaptable, for a long time, sand casting is always more common basic technology in Foundry Production, but use tradition casting Usually need multiple sprue gates to pour into a mould at the same time when making cast U-tube and ensure smooth casting mold, otherwise hold after U-tube casting Easily deform and crackle, cause U-tube mass defect.

The content of the invention

Deficiency, the utility model device provide a kind of heating inductor for U-tube sand casting for more than.

The utility model device institute is using technical solution：Mainly include positive electrode interface, negative electrode interface, water inlet pipe, Outlet pipe, induction coil, coil positioning sleeve, the locus angle β of every two circles adjacent windings is equal in induction coil, is sensed Coil half-turn is looped around around the metal casting liquid of U-tube semicircle pipe bent position, is placed in the metal casting liquid of cast and its moulding sand mo(u)ld Outside and be partially buried in molding sand, and be r per circle coil radius, in induction coil per circle coil with U-tube metal casting liquid Spacing distance a be equal, make full use of the kindred effect between coil two-by-two, reasonable layout electromagnetic energy, lifting heating is protected Temp effect, induction coil is surprisingly turned on sandbox during coil positioning sleeve prevents sensing heating using insulating materials, and coil is fixed Position set is drilled with bolt hole, and induction coil both sides are positioned on sandbox lower box by coil positioning sleeve, are carried out using bolt-connection Fixed, the top of induction coil both sides connects positive electrode interface and negative electrode interface, is respectively welded at induction coil both ends respectively Water inlet pipe and outlet pipe, water inlet pipe and outlet pipe are communicated with induction coil inner cavity.

By induction coil, coil positioning sleeve, sandbox lower box location fit, molding sand is inserted in sandbox and carries out U-tube casting Type, is put into core, and after sandbox mould assembling, cooling water is passed through from water inlet pipe, and cooling water is discharged by induction coil through outlet pipe, will Positive and negative electrode interface connects with the positive and negative anodes of power supply respectively, powers on when injecting metal casting liquid from sandbox central cast mouth, profit Heating and thermal insulation is carried out to metal casting liquid with induction coil, is made in U-tube away from the metal casting liquid at sprue gate before completing to pour into a mould Liquid condition is kept, stops cutting off the power while injection metal casting liquid, induction coil stops heating, and metal casting liquid solidifies to be formed U-tube, avoiding metal casting liquid in U-tube that metal freezing phenomenon occurs before not filling causes deformation and the generation of crackle, can subtract Few sprue gate quantity in sand casting.

The advantages of technical solution that the utility model device is provided is brought and good effect：

1st, metal casting liquid is heated using induction coil, has remained metal casting liquid before U-tube casting is complete Liquid condition, generation phenomena such as sprue gate quantity and deformation, crackle when reducing sand casting, improves casting matter Amount, obtained U-tube better mechanical property, meets product requirement.

2nd, designed sensor structure is simple, easily manufactured, is easily installed and dismantles, organizational form spirit during processing It is living convenient.

Brief description of the drawings

The utility model device is further illustrated with reference to the accompanying drawings and examples.

Fig. 1 is the axis before a kind of non-mould assembling of heating inductor sandbox for U-tube sand casting of the utility model device Mapping；

Fig. 2 is that the axis after a kind of heating inductor sandbox mould assembling for U-tube sand casting of the utility model device is surveyed Figure；

Fig. 3 is a kind of heating inductor partial top view for U-tube sand casting of the utility model device；

Fig. 4 is that the axis of induction coil in a kind of heating inductor for U-tube sand casting of the utility model device is surveyed Figure.

1. positive electrode interface, 2. water inlet pipes, 3. induction coils, 4. sandbox upper boxes, 5. sandbox lower boxes, 6. bolts hole, 7. coil positioning sleeve, 8. outlet pipes, 9. negative electrode interfaces

Embodiment

As shown in Figure 1, induction coil (3) both sides are positioned at by coil positioning sleeve (7) on sandbox lower box (5) and part It is embedded in molding sand, bolt hole (6) is drilled with coil positioning sleeve (7) and sandbox lower box (5), using bolt-connection by the line of induction Enclose (3) to fix, positive electrode interface (1), negative electrode interface (9) the connection power supply on induction coil (3) top, induction coil (3) two Water inlet pipe (2) and outlet pipe (8) is respectively welded in end, and as shown in Fig. 3 Fig. 4, induction coil (3) half-turn is looped around U shapes pipe semicircle Around the metal casting liquid of pipe bent position, and every circle coil radius is the interval of r, coil and U-tube outer surface metal casting liquid Distance a is equal, and the locus angle β of every two circles coil is equal in induction coil (3).

When the device is operated, as shown in Fig. 2, sandbox upper box (4) and sandbox lower box (5) mould assembling, cooling water is from water inlet Pipe (2) is passed through, and is discharged by induction coil (3) by outlet pipe (8), is played the role of cooling when induction coil (3) heats, Protect induction coil (3), metal casting liquid from sandbox central cast mouth inject, induction coil (3) power on to metal casting liquid into Row heating, when the casting is completed, stopping heating of cutting off the power, after induction coil (3) recovers room temperature, stops injection cooling water.

Claims

1. a kind of heating inductor for U-tube sand casting, mainly include positive electrode interface, negative electrode interface, water inlet pipe, Outlet pipe, induction coil, coil positioning sleeve, it is characterised in that：The locus of every two circles adjacent windings in the induction coil Angle β is equal, and the induction coil half-turn is looped around around the metal casting liquid of U-tube semicircle pipe bent position, the line of induction It is equal in circle per circle coil with the spacing distance a of U-tube metal casting liquid, the coil positioning sleeve is drilled with bolt hole, the sense Answer coil both sides to be positioned at by the coil positioning sleeve on sandbox lower box, be fixed using bolt-connection, the sensing The top of coil both sides connects the positive electrode interface and the negative electrode interface respectively, is welded respectively at the induction coil both ends The water inlet pipe and the outlet pipe are connect, the water inlet pipe and the outlet pipe are communicated with the induction coil inner cavity.

A kind of 2. heating inductor for U-tube sand casting according to claim 1, it is characterised in that：The sense Coil is answered on the outside of the metal casting liquid and its moulding sand mo(u)ld of cast and is partially buried in molding sand.

A kind of 3. heating inductor for U-tube sand casting according to claim 1, it is characterised in that：The line Circle positioning sleeve uses insulating materials.