An instant heating tube and a processing method thereof

Abstract

The application relates to an instant heating type heating pipe and a processing method thereof, which comprises a spiral pipe and an electric heating element sleeved in the spiral pipe, water inlets and outlets are connected to the two ends of the spiral pipe respectively, and a protection assembly is connected to the middle part of the spiral pipe. The application has the advantages of small volume, high heat conversion efficiency and high heating efficiency. The spiral pipe is processed in a liquid expansion mode, the heat conversion efficiency is high after the spiral pipe is matched with the electric heating element, the instant heating of liquid and air is realized through the protection assembly, the temperature is prevented from being too high, and dry burning is prevented. The application is convenient and reasonable to process, and the processing is performed in the following sequence: cutting and blanking, spiral pipe forming, water inlet and outlet processing, heating wire installation, magnesium oxide powder filling, pipe shrinking, flat head, moisture removal, pipe sealing, electric heating element and spiral pipe assembling, and detection. The application has good air tightness and can effectively prevent water leakage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heating element, in particular to a kind of instant heating type heating pipe and processing method thereof. BACKGROUND

[0002] Electric heating pipe is the electrical component that special electric energy is converted into heat energy.Presently for liquid heating pipe includes: stainless steel heating pipe, quartz heating pipe, printed electric heating film heating pipe.Among them, after being electrified, electric current flows through heating resistance wire, heating resistance wire generates heat, which is immersed in liquid, and heat is quickly dissipated through liquid, so that liquid is quickly heated.However, the existing stainless steel heating pipe of this type will produce power attenuation and heat loss after long-term use, which will slow down the temperature rise and not reach the desired high temperature, thereby affecting the heat conduction rate and heating efficiency. SUMMARY

[0003] The purpose of the present application is to provide an instant heating type heating pipe and processing method thereof, which has small volume and high heat conversion efficiency, to improve heating efficiency, can instantaneously heat liquid and air, and prevent temperature from being too high and dry burning through double protection, in addition, the processing is convenient and reasonable, the air tightness is good, and the characteristics of effectively preventing water leakage.

[0004] In order to solve the above technical problems, the present application solves the problem by the following technical scheme: an instant heating type heating pipe, comprising a spiral pipe and an electric heating element sleeved in the spiral pipe, the two ends of the spiral pipe are respectively connected with a water inlet nozzle and a water outlet nozzle, and a protection assembly is connected to the middle part of the spiral pipe.

[0005] Preferably, the spiral pipe comprises two end pipes, a middle pipe is arranged between the two end pipes, the middle pipe is composed of a plurality of uniformly arranged spiral protrusions, and the two end pipes and the middle pipe are integrally processed and formed by water swelling.

[0006] Further preferably, the protection assembly comprises a mounting bracket or stud connected to the middle part of the spiral pipe, and a temperature fuse and a dry burning sensor are connected to the mounting bracket or stud through a connecting sheet and a nut.

[0007] Further preferably, the electric heating element comprises a pipe body, a heating wire is arranged in the pipe body, and the two ends of the heating wire are respectively connected with a lead rod, one of the lead rods is connected with one end of the pipe body through a sealing end cover, magnesium oxide powder is filled between the pipe body and the heating wire, and the end of the pipe body connected with the sealing end cover and the other end for filling magnesium oxide powder are both sealed by insulating magnetic beads and RTV glue.

[0008] Further preferably, the water inlet nozzle and the water outlet nozzle are respectively connected with the spiral pipe and the mounting bracket or stud through laser welding.

[0009] A method for processing an instant heating type heating pipe, comprising the following steps:

[0010] a. cutting and blanking, cutting and blanking two long stainless steel pipes and two short stainless steel pipes according to required sizes, one long stainless steel pipe as an electric heating element, the other long stainless steel pipe as a spiral pipe, and the two short stainless steel pipes as a water inlet nozzle and a water outlet nozzle respectively;

[0011] b. spiral pipe forming, placing the stainless steel pipe as the spiral pipe into a mold of a liquid expander, and forming a spiral protrusion in the middle of the stainless steel pipe by liquid expansion of the liquid expander;

[0012] c. water inlet and outlet nozzle processing, bending and forming the two stainless steel pipes as the water inlet and outlet nozzles by a bending machine, and then laser welding the water inlet and outlet nozzles to the two ends of the spiral pipe;

[0013] d. installing a heating wire, winding the heating wire, connecting lead rods at two ends of the heating wire, and inserting the lead rods into the electric heating element so that the two lead rods are at the two ends of the electric heating element, and one end of the electric heating element is connected with a sealing end cover;

[0014] e. filling magnesium oxide powder, filling magnesium oxide powder into a gap between the electric heating element and the heating wire as an insulating medium and a heat conducting medium, vibrating the electric heating element after filling to make the magnesium oxide powder uniformly filled, and leading out the lead rods from the two ends of the electric heating element;

[0015] f. pipe shrinking, performing pipe shrinking treatment on the electric heating element with the installed heating wire, lead rods and filled magnesium oxide powder by a pipe shrinking machine;

[0016] g. flat end, performing turning flat end operation on one end or both ends of the electric heating element by a lathe so that the lengths of each electric heating element are the same and correspond to the length of the spiral pipe;

[0017] h. moisture removal, placing the electric heating element in a high-temperature furnace to perform moisture removal treatment on the inside of the electric heating element and the magnesium oxide powder;

[0018] i. pipe sealing, sealing the two ends of the electric heating element by insulating magnetic beads and RTV glue;

[0019] j. electric heating element and spiral pipe assembly, inserting the electric heating element into the spiral pipe, laser welding the two ends of the electric heating element and the spiral pipe, and then laser welding a support or a stud on the spiral pipe;

[0020] k. detection, detecting the heating and heat conducting time, temperature and air tightness of the product by corresponding detection equipment.

[0021] Preferably, in the step a, the lengths of the two long stainless steel pipes are 120-280 mm, the diameters are 12-15 mm, and the wall thicknesses are 0.5-1.5 mm.

[0022] Further preferably, in the step a, the length of the two-section thin short stainless steel pipe is 20-80 mm, the diameter is 3-6 mm, and the wall thickness is 0.2-0.5 mm.

[0023] Further preferably, in the step b, the water expansion pressure of the liquid expander is 300-500 tons, the stainless steel pipe is put into the mold, the joint of the liquid expander is sealingly connected to the two ends of the stainless steel pipe, and the liquid expander is pressurized from the inside of the stainless steel pipe, so that the middle section pipe is water expanded outwards.

[0024] Further preferably, in the step f, the diameter of the electric heating element after the pipe shrinking is 10-12.5 mm, which is convenient for being inserted into the spiral pipe.

[0025] The present application has the following advantages: the spiral pipe and the electric heating element sleeved in the spiral pipe are provided, the two ends of the spiral pipe are respectively connected with the water inlet nozzle and the water outlet nozzle, and the middle part of the spiral pipe is connected with the protection assembly, the present application has small volume, the spiral pipe is processed by water expansion, the heat efficiency conversion efficiency is high after the spiral pipe is matched with the electric heating element, the heating efficiency is improved, the liquid and the air can be instantaneously heated by the protection assembly, the temperature is prevented from being too high and dry burning is prevented, the processing is convenient and reasonable, the present application has good air tightness and can effectively prevent water leakage by sequentially performing the following steps: cutting and blanking, spiral pipe forming, water inlet nozzle and water outlet nozzle processing, installation of heating wire, filling of magnesium oxide powder, pipe shrinking, flat head, moisture removal, pipe sealing, assembly of the electric heating element and the spiral pipe, and detection. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic diagram of the present application.

[0027] Figure 2 is a front view of the present application.

[0028] Figure 3 is a sectional view of the present application. DETAILED DESCRIPTION

[0029] The present application will be further described in detail below in combination with the drawings and examples.

[0030] As Figures 1-3As shown, including the spiral pipe 1 and sleeve in the spiral pipe 1 electric heating element 2, the spiral pipe 1 both ends are connected with water inlet nozzle 3 and water outlet nozzle 4, the spiral pipe 1 middle part is connected with protection assembly, the spiral pipe 1 includes two end pipe 5, two end pipe 5 between being equipped with middle section pipe 6, the intermediate pipe is formed by several uniform spiral protrusions 7, several spiral protrusions 7 form spiral pipe-shaped waterway, two end pipe 5 and middle section pipe 6 adopt water swelling mode integrated molding, after the spiral pipe 1 is integrated molding by water swelling mode, the thickness of each spiral protrusion 7, the distance between adjacent two spiral protrusions 7 are uniform and equal, so that the effect of heat dissipation and heat conduction can be strengthened, liquid and air can be heated, and the temperature can be limited to 98 DEG C per second, the flow is 500-650ML per minute, and the thermal efficiency conversion efficiency reaches 92%.

[0031] In the embodiment, the protection assembly includes mounting bracket or stud 8 connected to the middle part of the spiral pipe 1, the temperature fuse and dry burning sensor are connected to the mounting bracket or stud 8 through the connecting sheet and nut, the water inlet nozzle 3 and the water outlet nozzle 4 are connected with the spiral pipe 1 and the mounting bracket or stud 8 through laser welding respectively, when the temperature is too high or dry burning without water, the heating pipe is controlled to stop heating by the temperature fuse and the dry burning sensor respectively, in addition, the present application can generate high-pressure steam, the generated steam can prevent dry burning, and there is no water in the interior, which can avoid rolling water and smelly water.

[0032] In the embodiment, the electric heating element 2 includes a pipe body, a heating wire 9 is arranged in the pipe body, and the two ends of the heating wire 9 are connected with the lead rod 10. One of the lead rods 10 is connected with one end of the pipe body through the sealing end cover 11. Magnesium oxide powder is filled between the pipe body and the heating wire 9. The end of the pipe body connected with the sealing end cover 11 and the other end for filling magnesium oxide powder are both sealed by sealing insulating magnetic beads and RTV glue. The magnesium oxide powder can uniformly conduct heat. In this way, the electric heating element 2 and the spiral pipe 1 can uniformly dissipate and conduct heat on both sides, which can greatly reduce heat loss, and there is no power attenuation when the temperature is adjusted without a pole. After the two ends are sealed by sealing insulating magnetic beads and RTV glue, water leakage can be effectively prevented.

[0033] A method for processing an instant heating type heating pipe, comprising the following steps:

[0034] a, cutting and blanking, cutting two long stainless steel pipes and two short stainless steel pipes according to the required size, one of the long stainless steel pipes is used as the electric heating element 2, the other long stainless steel pipe is used as the spiral pipe 1, and the two short stainless steel pipes are used as the water inlet nozzle 3 and the water outlet nozzle 4 respectively, the length of the two long stainless steel pipes is 120-280mm, the diameter is 12-15mm, and the wall thickness is 0.5-1.5mm, the length of the two short stainless steel pipes is 20-80mm, the diameter is 3-6mm, and the wall thickness is 0.2-0.5mm;

[0035] b. Spiral tube 1 forming, the stainless steel tube as the spiral tube 1 is placed in the mold of the liquid expander, the middle part of the stainless steel tube is hydroformed to form the spiral protrusions 7 by the liquid expander, the hydroforming pressure of the liquid expander is 300-500 tons, the stainless steel tube is placed in the mold, the joint of the liquid expander is sealingly connected at both ends of the stainless steel tube, the liquid expander pressurizes from the inside of the stainless steel tube, i.e. hydroforms the middle tube 6 from the inside to the outside, and the thickness of each protruding spiral protrusion 7 is 4.5-5.5 mm;

[0036] c. Inlet and outlet nozzles 4 processing, the two sections of the stainless steel tube as the inlet nozzle 3 and the outlet nozzle 4 are core-pulled and bent by the bending machine, and then the inlet nozzle 3 and the outlet nozzle 4 are laser-welded at both ends of the spiral tube 1;

[0037] d. Installing heating wires 9, the heating wires 9 are first wound, the lead rods 10 are connected at both ends of the heating wires 9 and are inserted into the electric heating element 2, so that the two lead rods 10 are at both ends of the electric heating element 2, and the electric heating element 2 has a sealing end cover 11 connected at one end;

[0038] e. Filling magnesium oxide powder, the magnesium oxide powder is filled into the gap between the electric heating element 2 and the heating wires 9 as an insulating medium and a heat-conducting medium, the electric heating element 2 is vibrated after the filling to make the magnesium oxide powder evenly filled, and the lead rods 10 are led out from both ends of the electric heating element 2;

[0039] f. Pipe shrinking, the electric heating element 2 with the installed heating wires 9, lead rods 10 and filled magnesium oxide powder is subjected to pipe shrinking treatment by a pipe shrinking machine, and the diameter of the electric heating element 2 is 10-12.5 mm after the pipe shrinking, so as to be easily inserted into the spiral tube 1;

[0040] g. Flat head, the turning flat head operation is performed on one end or both ends of the electric heating element 2 by a lathe, so that the length of each electric heating element 2 is the same and corresponds to the length of the spiral tube 1;

[0041] h. Moisture removal, the electric heating element 2 is placed in a high-temperature furnace for moisture removal treatment of the inside of the electric heating element 2 and the magnesium oxide powder;

[0042] i. Pipe sealing, the both ends of the electric heating element 2 are sealed by insulating beads and RTV glue;

[0043] j. Electric heating element 2 and spiral tube 1 assembly, the electric heating element 2 is inserted into the spiral tube 1, and the electric heating element 2 and the spiral tube 1 are laser-welded at both ends, and a support or a stud is laser-welded and connected on the spiral tube 1;

[0044] k. Detection, the heating and heat-conducting time, temperature and air tightness of the product are detected by corresponding detection equipment.

[0045] The instant heating pipe of the present application can bear water pressure of 5-50 PA, has the function of steam output, and replaces the pressure boiler; the water output speed is fast, one second for water output, the temperature of the first cup of water reaches 95-98 DEG C, if there is residual water or accumulated water in the pipe, first dry burning, then blowing and removing the impurities in the pipe through the external air pump, so that the scale can be solved.

[0046] The performance parameters of the instant heating pipe prepared according to the above method are shown in the following table

[0047] Time Temperature rise Heat conversion efficiency Flow / minute Withstand water pressure 0.5s 95℃ 90% 650 ML 50 PA 1s 98℃ 92% 650 ML 50 PA 2s 99℃ 95% 650 ML 50 PA 3s 100℃ 98% 650 ML 50 PA 650 ML 50 PA

[0048] According to the idea of the present application, there will be changes in the specific implementation and application range, and the content of the specification should not be understood as a limitation on the present application.

Claims

1. A method of processing an instant heating tube, characterized by: It comprises the following steps: a. Cutting, cutting two long stainless steel pipes and two short stainless steel pipes according to the required size, one of which is used as an electric heating element, the other as a spiral pipe, and the two short stainless steel pipes are used as water inlet and outlet nozzles; b. Spiral pipe forming, the stainless steel pipe used as the spiral pipe is placed in the mold of the liquid expander, and the middle part of the stainless steel pipe is hydroformed to form a spiral protrusion by the liquid expander; c. Inlet and outlet nozzle processing, the two stainless steel pipes used as the inlet and outlet nozzles are bent by the bending machine, and then the inlet and outlet nozzles are laser welded on both ends of the spiral pipe; d. Installing heating wire, winding the heating wire, connecting the lead rod at both ends of the heating wire, and inserting it into the electric heating element, so that the two lead rods are at both ends of the electric heating element, and the electric heating element is connected with a sealing end cover at one end; e. Filling magnesium oxide powder, filling magnesium oxide powder into the gap between the electric heating element and the heating wire as an insulating medium and a heat conducting medium, vibrating the electric heating element after filling to make the magnesium oxide powder evenly filled, and leading the lead rod out of both ends of the electric heating element; f. Pipe shrinking, the electric heating element with the installed heating wire, lead rod and filled magnesium oxide powder is subjected to pipe shrinking treatment by the pipe shrinking machine; g. Flat head, turning the electric heating element at one end or both ends by a lathe to make the length of each electric heating element the same and corresponding to the length of the spiral pipe; h. Moisture removal, placing the electric heating element in a high-temperature furnace to remove moisture from the inside of the electric heating element and the magnesium oxide powder; i. Pipe sealing, sealing the two ends of the electric heating element with insulating beads and RTV glue; j. Electric heating element and spiral pipe assembly, inserting the electric heating element into the spiral pipe, laser welding the electric heating element and the two ends of the spiral pipe, and then laser welding a support or stud on the spiral pipe; k. Detection, the heating and heat conduction time, temperature and air tightness of the product are detected by corresponding detection equipment.

2. A process for processing an instant heating tube according to claim 1, characterized in that: In step a, the length of the two long stainless steel pipes is 120-280 mm, the diameter is 12-15 mm, and the wall thickness is 0.5-1.5 mm.

3. A process for processing an instant heating tube as claimed in claim 1, wherein: In step a, the length of the two short stainless steel pipes is 20-80 mm, the diameter is 3-6 mm, and the wall thickness is 0.2-0.5 mm.

4. The method of claim 1, wherein: In step b, the hydroexpanding pressure of the liquid expander is 300-500 tons, the stainless steel pipe is placed in the mold, the joint of the liquid expander is sealed and connected at both ends of the stainless steel pipe, and the liquid expander is pressurized from the inside of the stainless steel pipe, that is, the middle pipe is hydroformed from the inside to the outside.

5. The method of claim 1 wherein: In step f, the diameter of the electric heating element after pipe shrinking is 10-12.5 mm, which is convenient for inserting into the spiral pipe.

6. An instant heating tube using the processing method of claim 1, characterized in that: The utility model provides a spiral pipe and electric heating element sleeved in spiral pipe, water inlet nozzle and water outlet nozzle are connected to both ends of the spiral pipe respectively, and the middle part of the spiral pipe is connected with a protection assembly; the spiral pipe comprises two end pipes, a middle pipe is arranged between the two end pipes, the middle pipe is composed of a plurality of uniformly arranged spiral protrusions, and the two end pipes and the middle pipe are integrally formed by water swelling; the protection assembly comprises a mounting bracket or a stud connected to the middle part of the spiral pipe, a temperature fuse and a dry burning prevention temperature sensor are connected to the mounting bracket or the stud through a connecting sheet and a nut.

7. An instant heating tube as claimed in claim 6, characterized in that: The electric heating element comprises a pipe body, a heating wire is arranged in the pipe body, both ends of the heating wire are connected with a lead rod, one of the lead rods is connected with one end of the pipe body through a sealing end cover, magnesium oxide powder is filled between the pipe body and the heating wire, and both ends of the pipe body are sealed through sealing insulating magnetic beads and RTV glue.

8. An instant heating tube as claimed in claim 6, wherein: The water inlet nozzle and the water outlet nozzle are connected with the spiral pipe through laser welding and argon arc welding respectively, and the mounting bracket or the stud is connected with the spiral pipe through laser welding and argon arc welding.

Images