阅读说明：本技术 一种绝缘不锈钢波纹管 (Insulating stainless steel corrugated pipe ) 是由 林新东 于 2019-11-29 设计创作，主要内容包括：本发明公开了一种绝缘不锈钢波纹管及其加工方法,包括一种绝缘不锈钢波纹管,包括管体、连接螺母,管体上设置有若干波峰、两两波峰之间形成波谷；所述管体内设置有内绝缘层,内绝缘层内设置有贯通至两端部的通水孔,所述管体的端部设置有固定翻边、并同时形成安装卡槽,所述内绝缘层的端部设置有与固定翻边抵靠的绝缘固定凸台；所述管体的长度与内绝缘层的长度匹配,内绝缘层的长度大于通水孔截面面积的17倍；本发明还包括了一种绝缘不锈钢波纹管的加工方法；本发明可以使不锈钢波纹管具有绝缘性,用于电热水器中使用时可以有效的避免触电风险,提高使用的安全性。(The invention discloses an insulating stainless steel corrugated pipe and a processing method thereof, wherein the insulating stainless steel corrugated pipe comprises a pipe body and a connecting nut, wherein a plurality of wave crests are arranged on the pipe body, and wave troughs are formed between every two wave crests; an inner insulating layer is arranged in the pipe body, a water through hole penetrating to two end parts is arranged in the inner insulating layer, a fixed flanging is arranged at the end part of the pipe body, an installation clamping groove is formed at the same time, and an insulating fixed boss abutting against the fixed flanging is arranged at the end part of the inner insulating layer; the length of the pipe body is matched with that of the inner insulating layer, and the length of the inner insulating layer is 17 times larger than the cross-sectional area of the water through hole; the invention also comprises a processing method of the insulating stainless steel corrugated pipe; the invention can lead the stainless steel corrugated pipe to have insulativity, can effectively avoid the risk of electric shock when being used in an electric water heater, and improves the use safety.)

1. An insulating stainless steel corrugated pipe comprises a pipe body and a connecting nut, wherein a plurality of wave crests are arranged on the pipe body, and wave troughs are formed between every two wave crests; the method is characterized in that: an inner insulating layer is arranged in the pipe body, a water through hole penetrating to two end parts is arranged in the inner insulating layer, a fixed flanging is arranged at the end part of the pipe body, an installation clamping groove is formed at the same time, and an insulating fixed boss abutting against the fixed flanging is arranged at the end part of the inner insulating layer; the length of the pipe body is matched with that of the inner insulating layer, and the length of the inner insulating layer is 17 times larger than the cross-sectional area of the water through hole.

2. An insulated stainless steel corrugated pipe according to claim 1, wherein: and the inner insulating layer is respectively provided with a positioning peak platform and a positioning peak groove which are correspondingly matched with the wave crest and the wave trough.

3. An insulated stainless steel corrugated pipe according to claim 1, wherein: the mounting groove is provided with an insulation clamping sleeve in a matching manner, the insulation clamping sleeve is provided with a mounting groove, and the connecting nut is mounted on the mounting groove.

4. An insulated corrugated stainless steel pipe as claimed in claim 3, wherein: the end part of the insulation clamping sleeve is provided with an insulation accommodating groove, and the fixed flanging and the insulation fixed boss are correspondingly positioned in the insulation accommodating groove.

5. An insulated stainless steel corrugated pipe according to claim 1, wherein: the length of the inner insulating layer is 17 times of the cross-sectional area of the water through hole.

6. An insulated stainless steel corrugated pipe according to claim 1, wherein: the inner insulating layer is made of a high-temperature-resistant insulating silica gel material.

7. A method for manufacturing an insulated stainless steel corrugated pipe according to claim 1, comprising: the processing method comprises two parts of mold design and processing flow;

first, the mold design includes the following steps:

(1) designing and developing a mould; (2) manufacturing a mould: the die comprises an upper die, a lower die and a positioning rod, wherein the upper die and the lower die are respectively provided with corresponding threaded pipe placing grooves, the length of each threaded pipe placing groove is designed according to the length of a stainless steel corrugated pipe to be processed, each threaded pipe placing groove is respectively provided with a rod groove and an insulating boss groove, the rod grooves, the insulating boss grooves and the threaded pipe placing grooves are coaxially arranged, a glue injection groove is arranged between every two insulating boss grooves, and a glue injection hole communicated with the glue injection grooves is formed in the upper die or the lower die; (3) and (5) completing the manufacture of the mold.

The processing flow comprises the following steps:

(1) placing: the positioning rod penetrates through a tube body of the stainless steel corrugated tube, then the stainless steel corrugated tube and the positioning rod are placed in a threaded tube placing groove of the lower die, the stainless steel corrugated tube is positioned in the threaded tube placing groove, fixing flanges at two ends of the stainless steel corrugated tube are positioned in an insulating boss groove, the outer wall of the circumference of the stainless steel corrugated tube and the inner wall of the insulating boss groove are in sealing abutting joint, the positioning rod forms positioning through rod grooves at two ends of the threaded tube placing groove, and the two ends of the positioning rod and the inner wall of the rod groove are in sealing abutting joint;

(2) carrying out die assembly: the upper die and the lower die are matched through mechanical transmission;

(3) and (3) mixing the sizing materials: fully stirring and mixing the rubber material according to a required proportion;

(4) injecting glue: injecting glue through the glue injection holes and the glue injection grooves; the rubber material enters the insulating boss groove and between the tube body of the stainless steel threaded tube and the positioning rod;

(5) curing and forming: an inner insulating layer is formed between the tube body of the stainless steel threaded tube and the positioning rod, an insulating fixing boss integrated with the inner insulating layer is formed in the insulating boss groove, and the insulating fixing boss is abutted against the fixing flanging;

(6) carrying out vulcanization treatment;

(7) performing die splitting: the upper die and the lower die are separated through mechanical transmission;

(8) cutting and separating: the inner insulation layers of two adjacent stainless steel threaded pipes are subjected to glue injection through the same glue injection groove, and are cut and separated from a joint formed by the glue injection grooves;

(9) separating the positioning rod: drawing out the positioning rod from the inner insulating layer;

(10) trimming: connecting the trimming burrs formed in the step (8) with the insulating fixing lug boss of the inner insulating layer, and trimming the trimming burrs;

(11) finishing the processing of the inner insulating layer;

(12) assembling parts: an insulating clamping sleeve is arranged at the end part of the stainless steel corrugated pipe, and a connecting nut is arranged on the insulating clamping sleeve;

(13) and finishing the processing of the insulating stainless steel corrugated pipe.

8. The method for processing an insulated stainless steel corrugated pipe according to claim 5, wherein the method comprises the following steps: step (9) of the process flow may be performed before step (8).

9. The method for processing an insulated stainless steel corrugated pipe according to claim 5, wherein the method comprises the following steps: and a positioning lug for positioning the positioning rod is arranged on the lower die in the die design.

Technical Field

The invention relates to the technical field of stainless steel corrugated hoses, in particular to an insulating stainless steel corrugated pipe.

Background

With the improvement of the quality of life, various electric water heaters are widely applied in life, and the water heater is provided with a water inlet and a water outlet which are connected with pipelines; the connecting pipelines in the market at present mainly comprise three types, namely braided hoses, stainless steel corrugated hoses and PPR (polypropylene random) pipes, and compared with other braided hoses and stainless steel corrugated hoses, the PPR pipes are not easy to bend and connect and adopt a hot melting connecting mode, so that the PPR pipes are less in use; compared with the stainless steel corrugated hose, the braided hose is not easy to deform and shape, has no long service life, is good in flexibility, high-temperature resistant and convenient to deform and shape, and is popular and most in use in the market.

Along with the popularization and the use of the electric water heater, electric shock accidents accompanied in life also occur frequently, and the existing stainless steel corrugated hose on the market has no insulating function; therefore, when the electric water heater leaks electricity in life, the electric leakage is formed on the stainless steel corrugated hose connected with the water inlet and the water outlet through the water path, so that the stainless steel corrugated hose has the risk of electric shock in the use process, and the use safety is not high.

Disclosure of Invention

The invention provides an insulating stainless steel corrugated pipe and a processing method thereof for solving the defects, so that the insulating stainless steel corrugated pipe has insulating property, the electric shock risk can be effectively avoided when the insulating stainless steel corrugated pipe is used in an electric water heater, and the use safety is improved.

In order to solve the technical problems, the technical scheme of the invention is as follows: an insulating stainless steel corrugated pipe comprises a pipe body and a connecting nut, wherein a plurality of wave crests are arranged on the pipe body, and wave troughs are formed between every two wave crests; an inner insulating layer is arranged in the pipe body, a water through hole penetrating to two end parts is arranged in the inner insulating layer, a fixed flanging is arranged at the end part of the pipe body, an installation clamping groove is formed at the same time, and an insulating fixed boss abutting against the fixed flanging is arranged at the end part of the inner insulating layer; the length of the pipe body is matched with that of the inner insulating layer, and the length of the inner insulating layer is 17 times larger than the cross-sectional area of the water through hole.

Furthermore, the inner insulating layer is respectively provided with a positioning peak platform and a positioning peak groove which are correspondingly matched with the wave crest and the wave trough.

Further, the installation clamping groove is provided with an insulation clamping sleeve in a matched mode, the insulation clamping sleeve is provided with an installation groove, and the connecting nut is installed on the installation groove.

Furthermore, the end part of the insulation clamping sleeve is provided with an insulation accommodating groove, and the fixed flanging and the insulation fixed boss are correspondingly positioned in the insulation accommodating groove.

Preferably, the length of the inner insulating layer is 17 times the cross-sectional area of the water passage hole.

Preferably, the inner insulating layer is made of a high-temperature-resistant insulating silica gel material.

The processing method of the insulating stainless steel corrugated pipe comprises two parts of mould design and processing flow;

first, the mold design includes the following steps:

(1) designing and developing a mould; (2) manufacturing a mould: the die comprises an upper die, a lower die and a positioning rod, wherein the upper die and the lower die are respectively provided with corresponding threaded pipe placing grooves, the length of each threaded pipe placing groove is designed according to the length of a stainless steel corrugated pipe to be processed, each threaded pipe placing groove is respectively provided with a rod groove and an insulating boss groove, the rod grooves, the insulating boss grooves and the threaded pipe placing grooves are coaxially arranged, a glue injection groove is arranged between every two insulating boss grooves, and a glue injection hole communicated with the glue injection grooves is formed in the upper die or the lower die; (3) and (5) completing the manufacture of the mold.

The processing flow comprises the following steps:

(1) placing: the positioning rod penetrates through a tube body of the stainless steel corrugated tube, then the stainless steel corrugated tube and the positioning rod are placed in a threaded tube placing groove of the lower die, the stainless steel corrugated tube is positioned in the threaded tube placing groove, fixing flanges at two ends of the stainless steel corrugated tube are positioned in an insulating boss groove, the outer wall of the circumference of the stainless steel corrugated tube and the inner wall of the insulating boss groove are in sealing abutting joint, the positioning rod forms positioning through rod grooves at two ends of the threaded tube placing groove, and the two ends of the positioning rod and the inner wall of the rod groove are in sealing abutting joint;

(2) carrying out die assembly: the upper die and the lower die are matched through mechanical transmission;

(3) and (3) mixing the sizing materials: fully stirring and mixing the rubber material according to a required proportion;

(4) injecting glue: injecting glue through the glue injection holes and the glue injection grooves; the rubber material enters the insulating boss groove and between the tube body of the stainless steel threaded tube and the positioning rod;

(5) curing and forming: an inner insulating layer is formed between the tube body of the stainless steel threaded tube and the positioning rod, an insulating fixing boss integrated with the inner insulating layer is formed in the insulating boss groove, and the insulating fixing boss is abutted against the fixing flanging;

(6) carrying out vulcanization treatment;

(7) performing die splitting: the upper die and the lower die are separated through mechanical transmission;

(8) cutting and separating: the inner insulation layers of two adjacent stainless steel threaded pipes are subjected to glue injection through the same glue injection groove, and are cut and separated from a joint formed by the glue injection grooves;

(9) separating the positioning rod: drawing out the positioning rod from the inner insulating layer;

(10) trimming: connecting the trimming burrs formed in the step (8) with the insulating fixing lug boss of the inner insulating layer, and trimming the trimming burrs;

(11) finishing the processing of the inner insulating layer;

(12) assembling parts: an insulating clamping sleeve is arranged at the end part of the stainless steel corrugated pipe, and a connecting nut is arranged on the insulating clamping sleeve;

(13) and finishing the processing of the insulating stainless steel corrugated pipe.

Step (9) of the process flow may be performed before step (8).

And a positioning lug for positioning the positioning rod is arranged on the lower die in the die design.

The invention has the following beneficial effects:

the stainless steel corrugated pipe processed by the processing method has good insulativity, effectively avoids the risk of electric shock in the use of the water heater in life, and improves the use safety.

The pipe body is internally provided with an insulating inner insulating layer, the water inlet and outlet parts simultaneously adopt insulating stainless steel corrugated pipes, and the resistance of water (the resistivity of the national standard at 15 ℃ of water is more than 1300 omega. cm) is utilized, and the unit length resistance of a limber hole of the inner insulating layer is as follows: 1300 omega cm/cross section area of the limber hole, the safe resistance of water is at least 22000 omega, and the safe length of the inner insulating layer is required to be: 22000 omega/(1300 omega cm/cross section area of the water through hole), therefore, the length of the inner insulating layer needs to be 17 times of the cross section area of the water through hole at least, the safe length of the inner insulating layer and the aperture of the water through hole are measured, the flowing water flow can reach zero voltage or extremely weak current below 0.02mA/Kw, therefore, when the electric water heater has electric leakage or earth wire electrification, the water inlet and outlet and the connected stainless steel corrugated pipe have no electric shock dangerous current, the part below the insulating stainless steel corrugated pipe has no electric shock danger, and the personal safety is ensured.

According to the invention, the insulating clamping sleeve is arranged at the connecting nut of the pipe body, so that the overcurrent danger caused by water leakage at the connecting part is avoided; the inner insulating layer is made of a silica gel material, has good bending performance, and does not influence the shape-walking shaping of the installation of the stainless steel corrugated pipe.

Drawings

FIG. 1 is a schematic view of the structure of an insulated stainless steel bellows according to the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an exploded view of the mold of the present invention;

FIG. 4 is an enlarged view of portion B of FIG. 3;

FIG. 5 is a plan view of the upper die of the present invention;

FIG. 6 is an enlarged view of section C of FIG. 5;

FIG. 7 is a schematic view of the upper and lower molds of the present invention after closing;

FIG. 8 is an enlarged view of section D of FIG. 7;

FIG. 9 is a schematic representation of the invention after curing;

fig. 10 is an enlarged view of a portion E of fig. 9.

Detailed Description

The invention is further elucidated with reference to the accompanying drawings.

Referring to fig. 1 and 2, the present invention provides an insulated stainless steel corrugated pipe, including a pipe body 1 and a connecting nut 1-1, wherein the pipe body 1 is provided with a plurality of wave crests 2, and wave troughs 3 are formed between every two wave crests 2; the pipe body 1 is larger than or equal to 15cm, the inner insulating layer 4 is arranged in the pipe body 1, the inner insulating layer 4 is internally provided with a water through hole 5 penetrating to two end parts, the diameter of the water through hole 5 is larger than or equal to 10mm, the length of the inner insulating layer 4 is matched with the length of the pipe body 1, the safety resistance of water is at least 22000 omega by utilizing the resistance (the resistivity is larger than 1300 omega at 15 ℃ of water in national standard), and the flowing water flow can reach zero voltage or infinitesimal current below 0.02mA/Kw by measuring the safety length of the inner insulating layer 4 and the aperture of the water through hole 5, wherein the length of the inner insulating layer is at least 17 times of the cross section area of the water through hole; the end part of the pipe body 1 is provided with a fixed flanging 6 and simultaneously forms an installation clamping groove 7, and the end part of the inner insulating layer 4 is provided with an insulating fixed boss 8 abutted against the fixed flanging 6; the inner insulating layer 4 and the insulating fixing lug bosses 8 at the end part enable the pipe body 1 to be completely insulated and isolated from water in and out of an electric water heater and a pipeline, so that the risk of electric shock is effectively avoided; the inner insulating layer 4 is respectively provided with a positioning peak platform 9 and a positioning peak groove 10 which are matched with the wave crests 2 and the wave troughs 3, the inner insulating layer 4 is formed by integral injection molding in the pipe body 1 through a shaping grinding tool, and the firmness of the attachment connection between the inner insulating layer 4 and the pipe body 1 is improved while the insulation is ensured; the length of the pipe body 1 is matched with that of the inner insulating layer 4, the length of the inner insulating layer 4 is greater than 17 times of the cross-sectional area of the water through hole, and the length of the inner insulating layer 4 is preferably selected when the length of the inner insulating layer 4 is 17 times of the cross-sectional area of the water through hole 5.

An insulation clamping sleeve 12 is installed on the installation clamping groove 7 in a matched mode, an installation groove 13 is formed in the insulation clamping sleeve 12, and the connecting nut 1-1 is installed on the installation groove 13; effectively avoiding the water leakage at the connecting part to cause the over-current danger.

The end part of the insulation clamping sleeve 12 is provided with an insulation accommodating groove 14, and the fixed flanging 6 and the insulation fixed boss 8 are correspondingly positioned in the insulation accommodating groove, so that the insulation property of connection is further ensured.

The inner insulating layer 4 is made of a high-temperature-resistant insulating silica gel material.

The processing method of the insulating stainless steel corrugated pipe comprises two parts of mould design and processing flow;

referring to fig. 3 to 6, firstly, the mold design includes the following steps:

(1) designing and developing a mould; (2) manufacturing a mould: the die comprises an upper die 15, a lower die 16 and a positioning rod 17, wherein the upper die and the lower die are respectively provided with a corresponding threaded pipe placing groove 18, the length of the threaded pipe placing groove 18 is designed according to the length of a stainless steel corrugated pipe to be processed, the threaded pipe placing groove 18 is respectively provided with a rod groove 19 and an insulating boss groove 20, the rod groove 19, the insulating boss groove 20 and the threaded pipe placing groove 18 are coaxially arranged, a glue injection groove 21 is arranged between every two insulating boss grooves 20, and a glue injection hole 22 communicated with the glue injection groove 21 is formed in the upper die 15 or the lower die 16; (3) and (5) completing the manufacture of the mold.

Referring to fig. 7 to 10, the processing flow includes the following steps:

(1) placing: the positioning rod 17 penetrates through the tube body 1 of the stainless steel corrugated tube, then the stainless steel corrugated tube and the positioning rod are placed in the threaded tube placing groove 18 of the lower die, the stainless steel corrugated tube is positioned in the threaded tube placing groove 18, the fixing flanges 6 at two ends of the stainless steel corrugated tube are positioned in the insulating boss groove 20, the circumferential outer wall of the stainless steel corrugated tube and the inner wall of the insulating boss groove 20 are in sealing abutting joint, the positioning rod 17 is positioned through the rod grooves 19 at two ends of the threaded tube placing groove 18, and the two ends of the positioning rod 17 and the inner wall of the rod groove 19 are in sealing abutting joint;

(2) carrying out die assembly: the upper die and the lower die are matched through mechanical transmission;

(3) and (3) mixing the sizing materials: fully stirring and mixing the rubber material according to a required proportion;

(4) injecting glue: injecting glue through the glue injection holes 22 and the glue injection grooves 21; the rubber material enters the insulating boss groove 20 and between the tube body 1 of the stainless steel threaded tube and the positioning rod 17;

(5) curing and forming: an inner insulating layer 4 is formed between the tube body 1 of the stainless steel threaded tube and the positioning rod 17, an insulating fixing boss 8 integrated with the inner insulating layer is formed in the insulating boss groove 20, and the insulating fixing boss 8 is abutted against the fixing flanging 6;

(6) carrying out vulcanization treatment;

(7) performing die splitting: the upper die and the lower die are separated through mechanical transmission;

(8) cutting and separating: the inner insulation layers of two adjacent stainless steel threaded pipes are subjected to glue injection through the same glue injection groove, and are cut and separated from a joint formed by the glue injection grooves;

(9) separating the positioning rod: the positioning rod 17 is pulled out from the inner insulating layer 4;

(10) trimming: connecting the trimming burrs formed in the step (8) with the insulating fixing lug boss of the inner insulating layer, and trimming the trimming burrs;

(11) finishing the processing of the inner insulating layer;

(12) assembling parts: an insulating clamping sleeve is arranged at the end part of the stainless steel corrugated pipe, and a connecting nut is arranged on the insulating clamping sleeve;

(13) and finishing the processing of the insulating stainless steel corrugated pipe.

Step (9) of the process flow may be performed before step (8).

And a positioning lug 25 for positioning the positioning rod is arranged on the lower die in the die design.

The present invention provides an insulated stainless steel corrugated pipe, which is described in detail above, and the principle and the implementation of the present invention are explained herein by using specific examples, and the description of the above embodiments is only used to help understanding the technical solution disclosed by the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation of the present invention.