CN111447700B

CN111447700B - Electric heating tube

Info

Publication number: CN111447700B
Application number: CN202010329606.5A
Authority: CN
Inventors: 陈妮
Original assignee: Yichang Yumiao Intelligence Technology Co ltd
Current assignee: Yichang Yumiao Intelligence Technology Co ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2022-02-15
Anticipated expiration: 2040-04-24
Also published as: CN111447700A

Abstract

An electric heating tube comprises an insulating tube, wherein a resistance wire caulking groove is formed in the outer wall of the insulating tube; the resistance wire is wound on the outer wall of the insulating tube and protrudes out of the surface of the outer wall of the insulating tube, and a space formed by winding of the resistance wire is an electrical isolation gap; the quartz glass tube covers and puts outside the resistance wire, and quartz glass tube's open end is fixed with basal portion fixed establishment, and the resistance wire electrical connection tip of resistance wire introduces basal portion fixed establishment, characteristics through quartz glass tube's open end: the electric connection mechanism at the upper end part of the resistance wire and the electric connection mechanism at the lower end part of the resistance wire are respectively matched with the upper end and the lower end of the insulating tube, the upper end of the resistance wire is connected with the electric connection mechanism at the upper end part of the resistance wire, the lower end of the resistance wire is connected with the electric connection mechanism at the lower end part of the resistance wire, and the opening end of the quartz glass tube is provided with a quartz glass tube sealing skirt; an electrical isolation filling layer is arranged in the electrical isolation gap. The electrical connection effect is good; the leakage situation can not occur; convenient daily inspection and maintenance.

Description

Electric heating tube

Technical Field

The invention belongs to the technical field of electric heating elements, and particularly relates to an electric heating pipe.

Background

Hot water or steam is used in such applications as garment ironing, vehicle washing, fabric finishing and sizing, adhesive application, floor heating, dish sterilization, sauna, winter steam heating, and the like. Specifically, the boiler continuously takes away heat absorbed by a heated surface by using the circulating flow of water during the operation process of the boiler, so as to heat and gasify the water into steam, as shown in CN108469045A (a steam generating device with steam recovery and steam-liquid separation functions) and CN108343938A (a fully automatic energy-saving and environment-friendly steam generating device), both of which are equipped with electric heating pipes (the former is called an "electric heating device", and the latter is called an "electric heater").

As described above, since the electric heating tube is a core component of the boiler, requirements such as structural and cost rationality, reliable sealing performance, a desired service life, convenience and safety in maintenance, and the like are severe. Technical information related to the electric heating tube is not well known in the published chinese patent literature, and typical examples such as CN2442181Y recommend "quartz glass liquid electric heating tube" and CN210202113U provides "single-end straight electric heating tube". More typically, "flanged electrical heating tube" as provided in CN2294088Y, the CN2294088Y is built by: the solar water heater is matched to supplement electric heating in rainy days, and structurally, a spiral groove is formed on the outer wall of a ceramic threaded support used as a carrier wound with an electric heating wire, so that the electric heating wire is prevented from moving. However, the aforesaid CN2294088Y still has the following disadvantages: for one, the lack of a measure for reliably defining the two end points of the resistance wire (called "heating wire" in the patent, the same applies hereinafter) and the lack of teaching in the specification of the patent that the two ends of the resistance wire are defined and perform a good electrical connection function are not sufficient to reliably define the resistance wire on the ceramic threaded bracket with grooves (i.e., "insulating tube", the same applies hereinafter); secondly, the structure of the opening end of the quartz glass tube covered outside the resistance wire is unreasonable, so that the sealing effect expected in the industry is not sufficiently reflected in the use state, namely the leakage situation is easy to occur; thirdly, because the resistance wires are subjected to phenomena such as oxide stretching, relaxation and deformation after being frequently used, the upper and lower adjacent resistance wires can cross gaps to generate lap joint or merging situations, so that the service life of the resistance wires is influenced; fourthly, since the entire fixing mechanism of the base and the structure of the power lead part are relatively complicated, it is troublesome to manufacture on the one hand, and inconvenient to install and daily inspection and maintenance on the other hand. In view of the foregoing, there is a need for improvement, and the technical solutions described below are made in this context.

Disclosure of Invention

The invention aims to provide an electric heating tube which is beneficial to reliably limiting two ends of a resistance wire wound outside an insulating tube so as to ensure good electric connection effect, is beneficial to enabling an opening end of a quartz glass tube covered outside the resistance wire to have excellent sealing effect in a use state so as to avoid leakage in the use process, is convenient to prevent the resistance wire from causing disappearance of an electric isolation gap between adjacent spiral coils of the resistance wire due to stretching, loosening and deformation in the use process so as to ensure ideal service life, and is beneficial to simplifying the structure of a base fixing mechanism so as to be convenient to manufacture, install and daily inspection and maintenance.

The task of the invention is completed in such a way that an electric heating tube comprises an insulating tube, wherein a resistance wire caulking groove extending from one end of the insulating tube to the other end is formed on the outer wall of the insulating tube in a spiral state; the resistance wire is wound on the outer wall of the insulating tube along with the resistance wire caulking groove and protrudes out of the surface of the outer wall of the insulating tube, and a space between resistance wire spiral coils formed on the outer wall of the insulating tube by winding of the resistance wire is formed into an electrical isolation gap; a quartz glass tube and a base fixing mechanism, the quartz glass tube is covered outside the resistance wire, the open end of the quartz glass tube faces the base fixing mechanism and is sealed and fixed with the base fixing mechanism, the electric connection end part of the resistance wire is led into the base fixing mechanism through the open end of the quartz glass tube, the quartz glass tube is characterized by also comprising an electric connection mechanism at the upper end part of the resistance wire and an electric connection mechanism at the lower end part of the resistance wire, the electric connection mechanism at the upper end part of the resistance wire is matched with the upper end of the insulation tube, the electric connection mechanism at the lower end part of the resistance wire is matched with the lower end of the insulation tube, the electric connection mechanism at the upper end part of the resistance wire and the electric connection mechanism at the lower end part of the insulation tube corresponding to the insulation tube cavity of the insulation tube extend to the base fixing mechanism, the upper end of the resistance wire is connected with the electric connection mechanism at the upper end part of the resistance wire, the lower end of the resistance wire is connected with an electrical connection mechanism at the lower end of the resistance wire, a quartz glass tube sealing skirt which is outwards unfolded is formed at the opening end of the quartz glass tube and surrounds the circumferential direction of the quartz glass tube, and the quartz glass tube sealing skirt is fixed with the base fixing mechanism in a sealing way; and an electric isolation filling layer is arranged in the electric isolation gap.

In a specific embodiment of the invention, an insulating tube upper fitting stepped groove is formed at the upper end of the cavity wall of the insulating cavity of the insulating tube and around the circumferential direction of the insulating cavity, and an insulating tube lower fitting stepped groove is formed at the lower end of the cavity wall of the insulating cavity of the insulating tube and also around the circumferential direction of the insulating cavity; the electric connection mechanism at the upper end part of the resistance wire is matched with the upper end of the insulating tube at the position corresponding to the upper matching step groove of the insulating tube, and the electric connection mechanism at the lower end part of the resistance wire is matched with the lower end of the insulating tube at the position corresponding to the lower matching step groove of the insulating tube; the upper end of the resistance wire is fixedly connected with the electrical connection mechanism at the upper end of the resistance wire after penetrating through the electrical connection mechanism at the upper end of the resistance wire, and the lower end of the resistance wire is fixedly connected with the electrical connection mechanism at the lower end of the resistance wire after penetrating through the electrical connection mechanism at the lower end of the resistance wire; the quartz glass tube is transparent; and a skirt upper sealing ring is arranged at a position corresponding to the upper part of the sealing skirt of the quartz glass tube, a skirt lower sealing washer is arranged at a position corresponding to the lower part of the sealing skirt of the quartz glass tube, and the sealing skirt of the quartz glass tube and the base fixing mechanism are sealed and fixed by the skirt upper sealing ring and the skirt lower sealing washer.

In another specific embodiment of the invention, the electrical connection mechanism for the upper end of the resistance wire comprises an upper fitting joint of the insulating tube, an upper transition conducting strip, an upper conducting rod protecting sleeve and a limiting sleeve, wherein an upper fitting stepped groove embedding stacked ring is formed on the upper fitting joint of the insulating tube and surrounds the circumferential direction of the upper fitting joint of the insulating tube at a position corresponding to the fitting stepped groove on the insulating tube, the upper fitting stepped groove embedding stacked ring is in embedding fit with the fitting stepped groove on the insulating tube, an upper fitting joint resistance wire guide hole penetrating through the upper fitting joint of the insulating tube along the wall thickness direction is formed on the upper fitting joint of the insulating tube, the upper end of the resistance wire penetrates into the inner side of the upper fitting joint of the insulating tube from the outer side of the upper fitting joint resistance wire guide hole of the insulating tube at a position corresponding to the upper fitting joint resistance wire guide hole and is led to one side of the upper fitting joint of the insulating tube facing upwards, one end of the upper transition conducting strip is fixed with one upward side of the upper matching joint of the insulating tube through an upper transition conducting strip fixing screw at a position corresponding to the upper end of the resistance wire and in a state of clamping the upper end of the resistance wire, the other end of the upper transition conducting strip is sleeved at the upper end of the upper conducting rod and locked by a pair of upper transition conducting strip locking nuts screwed at the upper end of the upper conducting rod, the lower end of the upper conducting rod is fixed with the base fixing mechanism, the upper conducting rod protecting sleeve is positioned in the insulating tube cavity of the insulating tube and sleeved in the middle of the upper conducting rod, and the lower end of the upper conducting rod is limited to be sleeved with the sleeve and matched with the base fixing mechanism; the lower end part electrical connection mechanism of the resistance wire comprises an insulating tube lower matching joint, a lower transition conducting strip, a lower conducting rod protecting sleeve and a limiting sleeve, a lower matching step groove embedding stack ring is formed on the insulating tube lower matching joint and at the position corresponding to the insulating tube lower matching step groove in the circumferential direction of the insulating tube lower matching joint, the lower matching step groove embedding stack ring is in embedding matching with the insulating tube lower matching step groove, a lower matching joint resistance wire guide hole penetrating through the insulating tube lower matching joint along the wall thickness direction is formed in the insulating tube lower matching joint, the lower end of the resistance wire penetrates into the inner side of the insulating tube lower matching joint from the outer side of the insulating tube lower matching joint at the position corresponding to the lower matching joint resistance wire guide hole and is led to the downward side of the insulating tube lower matching joint, one end of the lower transition conducting strip is fixed with the downward side of the lower matching joint of the insulating tube through a lower transition conducting strip fixing screw in a position corresponding to the lower end of the resistance wire and in a state of clamping the lower end of the resistance wire, the other end of the lower transition conducting strip is sleeved at the upper end of the lower conducting rod and locked by a pair of lower transition conducting strip locking nuts which are screwed at the upper end of the lower conducting rod, the lower end of the lower conducting rod is fixed with the base fixing mechanism, and a lower conducting rod protecting sleeve and a limiting sleeve are respectively sleeved at the middle part and the lower part of the lower conducting rod and matched with the base fixing mechanism; the upper sealing ring of the skirt edge, which is sleeved on the quartz glass tube and is positioned at the upper part of the sealing skirt edge of the quartz glass tube, is a silicon rubber ring, and the lower sealing washer of the skirt edge, which is positioned below the sealing skirt edge of the quartz glass tube, is a polytetrafluoroethylene gasket.

In another specific embodiment of the present invention, the base fixing mechanism includes a boiler fixing flange, a transition connection screw sleeve, an insulating support plate, and a protective sleeve, the boiler fixing flange is bolted or screwed to the boiler in use, a seal ring defining edge is formed on an upper portion of an inner wall of the boiler fixing flange, a flange internal thread is formed on the inner wall of the boiler fixing flange, the transition connection screw sleeve corresponds to a lower portion of the insulating support plate and a transition connection screw sleeve external thread is formed on an outer wall of the transition connection screw sleeve, the flange internal thread is fitted and fixed to a transition connection screw sleeve external thread formed on an upper portion of an outer wall of the transition connection screw sleeve, the insulating support plate is supported on the transition connection screw sleeve at a position corresponding to a lower portion of the seal ring under the skirt, the protective sleeve has a protective sleeve cavity, and a protective sleeve internal thread is formed on an upper portion of the protective sleeve cavity, the thread on the inner wall of the protective sleeve is matched and fixed with the thread on the outer thread of the transitional connecting threaded sleeve formed on the lower part of the outer wall of the transitional connecting threaded sleeve, and a power line guide hole is formed in the center of the bottom of the protective sleeve; the lower end of the upper conducting rod protecting sleeve is supported on the upward side of the insulating supporting disk, the upper end face of the limiting sleeve is contacted with the downward surface of the insulating supporting disk, the lower end of the upper conducting rod penetrates through the limiting sleeve and then extends into the protecting sleeve cavity and is locked by an upper conducting rod locking nut which is screwed on the lower end of the upper conducting rod, and the limiting sleeve is limited by the contact of the upper surface of the upper conducting rod locking nut and the lower surface of the limiting sleeve; the lower conductive rod protecting sleeve is supported on the insulating supporting disk, the end surface of the upper end of the limiting sleeve is contacted with the surface of one downward side of the insulating supporting disk, the lower end of the lower conductive rod penetrates through the limiting sleeve and then extends into the protecting sleeve cavity and is locked by a lower conductive rod locking nut which is screwed at the lower end of the lower conductive rod, and the limiting sleeve is limited by the contact of the upper surface of the lower conductive rod locking nut and the lower surface of the limiting sleeve; the quartz glass tube sealing skirt of the quartz glass tube together with the skirt upper sealing ring and the skirt lower sealing washer are arranged between the edge part of the downward side of the limiting edge of the sealing ring and the edge part of the upward side of the insulating supporting disc.

In yet another specific embodiment of the present invention, the insulating tube is a ceramic tube; the resistance wire is a nickel wire or an iron chromium aluminum wire; the electric isolation filling and blocking layer is aluminum dihydrogen phosphate or aluminum oxide filling and blocking agent.

In still another embodiment of the present invention, the quartz glass tube is a high temperature resistant and corrosion resistant quartz glass tube.

In a more specific embodiment of the present invention, the upper and lower mating connectors of the insulating tube are stainless steel.

In a further specific embodiment of the present invention, the limiting sleeve, the lower conducting rod protecting sleeve and the lower limiting sleeve are ceramic sleeves.

In a still more particular embodiment of the invention, said insulating support disc is a high temperature resistant insulating disc, which is a mica disc.

In yet another embodiment of the present invention, a pair of first power cord end insertion piece clamping washers i is provided at the lower end of the upper conductive rod extending into the protective sleeve cavity of the protective sleeve, and a first power cord end insertion piece clamping washer locking nut i is rotatably provided at a position corresponding to the lower side of the first power cord end insertion piece clamping washer i; a pair of second power cord end insertion piece clamping gaskets II is arranged at the lower end of the lower conducting rod extending into the protecting sleeve cavity of the protecting sleeve in a matching mode, and a second power cord end insertion piece clamping gasket locking nut II is arranged at a position, corresponding to the lower portion of the pair of second power cord end insertion piece clamping gaskets II, in a rotating mode; when the boiler fixing flange is fixed with a boiler interface of a boiler through bolts, bolt holes are arranged at intervals around the boiler fixing flange, and when the boiler fixing flange is fixed with the boiler interface of the boiler through threads, boiler interface matching external threads are formed on the outer wall of the boiler fixing flange.

One of the technical effects of the technical scheme provided by the invention is that as the upper end and the lower end of the resistance wire corresponding to the insulating tube are respectively provided with the electric connection mechanism at the upper end part of the resistance wire and the electric connection mechanism at the lower end part of the resistance wire, the upper end and the lower end of the resistance wire can be respectively and reliably limited, so that good electric connection effect can be ensured; secondly, because the opening end of the quartz glass tube is provided with the quartz glass tube sealing skirt edge and the skirt edge upper sealing ring and the skirt edge lower sealing ring are respectively arranged at the positions corresponding to the quartz glass tube sealing skirt edge, the quartz glass tube can play a role in sealing and shielding the resistance wire and playing a role in reliably sealing the boiler, and the leakage situation can not occur; thirdly, because the electrical isolation filling layer is arranged in the electrical isolation gap between the spiral coils of the adjacent resistance wires of the resistance wires, the electrical isolation gap between the spiral coils of the adjacent resistance wires can be prevented from disappearing due to the fact that the resistance wires are stretched and loosened to deform in the using process, and the ideal service life of the resistance wires is ensured; the base fixing mechanism has simple structure, so that the base fixing mechanism not only can be conveniently manufactured and installed, but also can meet the convenient requirement of daily inspection and maintenance.

Drawings

Fig. 1 is a schematic view of a first embodiment of the present invention.

Fig. 2 is a schematic view of a second embodiment of the present invention.

Detailed Description

In order to clearly understand the technical spirit and the advantages of the present invention, the applicant below describes in detail by way of example, but the description of the example is not intended to limit the technical scope of the present invention, and any equivalent changes made according to the present inventive concept, which are merely in form and not in material, should be considered as the technical scope of the present invention.

In the following description, any concept related to the directions or orientations of up, down, left, right, front, and rear is given with respect to the position of the drawings, and thus should not be construed as particularly limiting the technical solution provided by the present invention.

Example 1:

referring to fig. 1, an insulating tube 1 is shown, and a resistance wire caulking groove 11 which extends upwards from one end of the insulating tube 1, namely the lower end in the position state shown in fig. 1, to the other end, namely the upper end in the position state shown in fig. 1, is formed on the outer wall of the insulating tube 1 in a spiral state; a resistance wire 2 is shown, the resistance wire 2 is wound on the outer wall of the insulating tube 1 along the resistance wire caulking groove 11 and protrudes out of the surface of the outer wall of the insulating tube 1, and the space between resistance wire spiral coils formed on the outer wall of the insulating tube 1 by winding of the resistance wire 2 is formed into an electric isolation gap 12; a quartz glass tube 3 and a base fixing means 4 are shown, the quartz glass tube 3 is covered outside the resistance wire 2, i.e. a space 32 is kept between the inner wall of the quartz glass tube 3 and the resistance wire 2, the open end of the quartz glass tube 3, i.e. the lower end shown in fig. 1, faces the base fixing means 4 and is fixed in a sealing manner with the base fixing means 4, and the electrical connection end of the resistance wire 2 is led into the base fixing means 4 through the open end of the quartz glass tube 3.

In the embodiment, the cross section of the resistance wire caulking groove 11 is in an inverted Jiong shape, so that the cross section of the resistance wire 2 is in a rectangular shape, namely, the cross section is matched with the shape of the resistance wire caulking groove 11. However, the cross-sectional shape of the resistance wire caulking groove 11 is not limited to the aforementioned shape, and the cross-sectional shape of the resistance wire 2 and the shape of the resistance wire caulking groove 11 are kept in a stepwise relationship, i.e., in a relationship of fitting each other.

The technical key points of the technical scheme provided by the invention are as follows: the structural system of the electric heating tube also comprises an upper end part electric connecting mechanism 5 of the resistance wire and a lower end part electric connecting mechanism 6 of the resistance wire, the upper end part electric connecting mechanism 5 of the resistance wire is matched with the upper end of the insulating tube 1, the lower end part electric connecting mechanism 6 of the resistance wire is matched with the lower end of the insulating tube 1, the upper end part electric connecting mechanism 5 of the resistance wire and the lower end part electric connecting mechanism 6 of the resistance wire extend to the base fixing mechanism 4 at the position corresponding to the lower end of the insulating tube cavity 13 of the insulating tube 1, the upper end of the resistance wire 2 is connected with the upper end part electric connecting mechanism 5 of the resistance wire, the lower end of the resistance wire 2 is connected with the lower end part electric connecting mechanism 6 of the resistance wire, a quartz glass tube sealing skirt 31 which extends outwards is formed at the opening end of the quartz glass tube 3 and around the circumferential direction of the quartz glass tube 3, the quartz glass tube sealing skirt 31 is fixed with the base fixing mechanism 4 in a sealing way; an electrically isolating caulking layer 121 is provided in the electrically isolating gap 12.

Continuing to refer to fig. 1, an insulating tube upper fitting stepped groove 131 is formed at the upper end of the cavity wall of the insulating tube cavity 13 of the aforementioned insulating tube 1 and around the circumferential direction of the insulating tube cavity, and an insulating tube lower fitting stepped groove 132 is formed at the lower end of the cavity wall of the insulating tube cavity 13 of the insulating tube 1 and also around the circumferential direction of the insulating tube cavity 13; the electric connecting mechanism 5 at the upper end part of the resistance wire is matched with the upper end of the insulating tube 1 at a position corresponding to the matching stepped groove 131 on the insulating tube, and the electric connecting mechanism 6 at the lower end part of the resistance wire is matched with the lower end of the insulating tube 1 at a position corresponding to the matching stepped groove 132 below the insulating tube; the upper end of the resistance wire 2 is fixedly connected with the electrical connection mechanism 5 at the upper end of the resistance wire after penetrating into the electrical connection mechanism 5 at the upper end of the resistance wire, and the lower end of the resistance wire 2 is fixedly connected with the electrical connection mechanism 6 at the lower end of the resistance wire after penetrating into the electrical connection mechanism 6 at the lower end of the resistance wire.

In the present embodiment, the aforementioned quartz glass tube 3 is transparent; a skirt upper sealing ring 311 is provided at a position corresponding to the upper portion of the sealing skirt 31 of the quartz glass tube, and a skirt lower sealing washer 312 is provided at a position corresponding to the lower portion of the sealing skirt 31 of the quartz glass tube, and the sealing skirt 31 of the quartz glass tube and the base fixing means 4 are fixed by the skirt upper sealing ring 311 and the skirt lower sealing washer 312 in a sealing manner.

Continuing with fig. 1, the electrical connection mechanism 5 for the upper end of the resistance wire includes an upper fitting connector 51 on the insulating tube, an upper transition conductive sheet 52, an upper conductive rod 53, an upper conductive rod sheath tube 54 and a limiting sleeve 55, wherein an upper fitting stepped groove insert collar 511 is formed on the upper fitting connector 51 on the insulating tube, i.e. on one side of the upper fitting connector 51 on the insulating tube facing downward and around the circumference of the upper fitting connector 51 on the insulating tube at a position corresponding to the fitting stepped groove 131 on the insulating tube, the upper fitting stepped groove insert collar 511 is in insert fit with the fitting stepped groove 131 on the insulating tube, an upper fitting resistance wire 512 penetrating through the upper fitting connector 51 on the insulating tube in the wall thickness direction is formed on the upper fitting connector 51 on the insulating tube, and the upper end of the resistance wire 2 penetrates through the inner side of the upper fitting connector 51 on the insulating tube from the outer side (also referred to as "outer wall") of the upper fitting resistance wire 51 on the insulating tube at a position corresponding to the upper fitting connector guide hole 512 and penetrates into the inner side of the fitting connector 51 and is a position corresponding to the inner side of the upper fitting connector 51 and is referred to the upper fitting connector Leading to the upward side of the upper fit joint 51 of the insulating tube, fixing one end of an upper transition conducting strip 52 with the upward side of the upper fit joint 51 of the insulating tube by an upper transition conducting strip fixing screw 521 at a position corresponding to the upper end of the resistance wire 2 and in a state of clamping the upper end of the resistance wire 2, sleeving the other end of the upper transition conducting strip 52 on the upper end of the upper conducting rod 53 and locking by a pair of upper transition conducting strip locking nuts 522 screwed on the upper end of the upper conducting rod 53, fixing the lower end of the upper conducting rod 53 with the base fixing mechanism 4, namely positioning on the base fixing mechanism 4, positioning an upper conducting rod sheath tube 54 in the insulating tube cavity 13 of the insulating tube 1 and sleeving the middle part of the upper conducting rod 53, and limiting a sleeve 55 sleeving the lower end of the upper conducting rod 53 and matching with the base fixing mechanism 4; the electrical connection mechanism 6 for the lower end of the resistance wire comprises an insulating tube lower fitting joint 61, a lower transition conducting strip 62, a lower conducting rod 63, a lower conducting rod sheath tube 64 and a limiting sleeve 65, wherein a lower fitting step groove embedding stack ring 611 is formed on the insulating tube lower fitting joint 61, namely on one side of the insulating tube lower fitting joint 61 facing upwards, and surrounds the circumference direction of the insulating tube lower fitting joint 61 at the position corresponding to the insulating tube lower fitting step groove 132, the lower fitting step groove embedding stack ring 611 is in embedding fit with the insulating tube lower fitting step groove 132, a lower fitting resistance wire joint guide hole 612 penetrating through the insulating tube lower fitting joint 61 along the wall thickness direction is formed on the insulating tube lower fitting joint 61, the lower end of the resistance wire 2 penetrates through the inner side of the insulating tube lower fitting joint 61 at the position corresponding to the lower fitting joint guide hole 612 from the outer side of the insulating tube lower fitting joint 61 and is led to the insulating tube lower fitting joint 61 facing towards the insulating tube lower fitting joint 61 and is led to the lower fitting joint 61 facing towards the lower fitting joint guide hole 612 And one end of the lower transition conducting strip 62 is fixed to the downward side of the lower matching joint 61 of the insulating tube through a lower transition conducting strip fixing screw at a position corresponding to the lower end of the resistance wire 2 and in a state of clamping the lower end of the resistance wire 2, the other end of the lower transition conducting strip 62 is sleeved on the upper end of the lower conducting rod 63 and is locked by a pair of lower transition conducting strip locking nuts 621 screwed on the upper end of the lower conducting rod 63, and the lower end of the lower conducting rod 63 is fixed to the base fixing mechanism 4, namely is positioned on the base fixing mechanism 4. The lower conducting rod protecting sleeve 64 and the limiting sleeve 65 are respectively sleeved on the middle part and the lower part of the lower conducting rod 63 and are matched with the base fixing mechanism 4.

The upper end of the resistance wire 2 is wound and covered on the outer wall of the upper matching joint 51 of the insulating tube, and the lower end is wound and covered on the outer wall of the lower matching joint 61 of the insulating tube.

In this embodiment, the skirt upper sealing ring 311 disposed on the quartz glass tube 3 and located above the sealing skirt 31 of the quartz glass tube is a silicone rubber ring, and the skirt lower sealing ring 312 corresponding to the lower portion of the sealing skirt 31 of the quartz glass tube is a teflon gasket or other equivalent material gasket.

Continuing to refer to fig. 1, the aforementioned base fixing mechanism 4 includes a boiler fixing flange 41, a transition connection screw sleeve 42, an insulation supporting disk 43 and a protective sleeve 44, in this embodiment, the boiler fixing flange 41 is bolted to the boiler in the use state, a sealing ring limiting edge 411 is formed on the upper portion of the inner wall of the boiler fixing flange 41, a flange internal thread 412 is formed on the inner wall of the boiler fixing flange 41, the transition connection screw sleeve 42 corresponds to the lower portion of the insulation supporting disk 43 and a transition connection screw sleeve external thread 421 is formed on the outer wall of the transition connection screw sleeve 42, the aforementioned flange internal thread 412 is fixed in cooperation with the transition connection screw sleeve external thread 421 formed on the upper portion of the outer wall of the transition connection screw sleeve 42, the insulation supporting disk 43 is supported on the transition connection screw sleeve 42 at the position corresponding to the lower portion of the aforementioned skirt lower sealing ring 312, the protective sleeve 44 has a protective sleeve cavity 441, a protective sleeve inner wall thread 4411 is formed on the inner wall of the upper part of the protective sleeve cavity 441, the protective sleeve inner wall thread 4411 is in threaded fit with the transition connection thread insert external thread 421 formed on the lower part of the outer wall of the transition connection thread insert 42, and a power line guide hole 442 is formed in the center of the bottom of the protective sleeve 44; the lower end of the upper conductor bar sheath tube 54 is supported on the upward side of the insulating support disk 43, the upper end surface of the limiting sleeve 55 is in contact with the downward surface of the insulating support disk 43, the lower end of the upper conductor bar 53 penetrates through the limiting sleeve 55, then extends into the protective sleeve cavity 441, is locked by an upper conductor bar locking nut 531 screwed on the lower end of the upper conductor bar 53, and limits the limiting sleeve 55 by the contact between the upper surface of the upper conductor bar locking nut 531 and the lower surface of the limiting sleeve 55; the lower conducting rod protecting sleeve 64 is supported on the insulating supporting disk 43, the upper end surface of the limiting sleeve 65 is contacted with the downward side surface of the insulating supporting disk 43, the lower end of the lower conducting rod 63 penetrates through the limiting sleeve 65, then extends into the protecting sleeve cavity 441 and is locked by a lower conducting rod locking nut 631 screwed at the lower end of the lower conducting rod 63, and the upper surface of the lower conducting rod locking nut 631 is contacted with the lower surface of the limiting sleeve 65 to limit the limiting sleeve 65; the quartz glass tube sealing skirt 31 of the quartz glass tube 3 is interposed between the edge portion of the side facing downward of the sealing ring defining edge 411 and the edge portion of the side facing upward of the insulating support plate 43 together with the skirt upper sealing ring 311 and the skirt lower sealing ring 312.

In this embodiment, the insulating tube 1 is a ceramic tube; the resistance wire 2 is a nickel wire, but an iron-chromium-aluminum wire (i.e., an iron-chromium-aluminum alloy wire) can also be used; the electrical isolation plugging layer 121 is aluminum dihydrogen phosphate, but an aluminum oxide plugging agent may also be used.

In the present embodiment, the quartz glass tube 3 is a high-temperature-resistant and corrosion-resistant quartz glass tube, that is, the quartz glass tube 3 is a quartz glass tube having high-temperature-resistant and corrosion-resistant effects.

In the present embodiment, the upper insulating tube fitting 51 and the lower insulating tube fitting 61 are made of stainless steel.

In this embodiment, the limiting sleeve 55, the lower conducting rod protecting sleeve 64 and the lower limiting sleeve 65 are ceramic sleeves; the aforementioned insulating support disc 43 is a high temperature resistant insulating disc, which is a mica disc made of mica material.

As shown in fig. 1, a pair of first power cord end insertion piece clamping washers i 532 is provided at the lower end of the upper conductive rod 53 extending into the protective sheath cavity 441 of the protective sheath 44, and a first power cord end insertion piece clamping washer locking nut i 533 is provided at a position corresponding to the lower side of the first power cord end insertion piece clamping washer i 532; a pair of second power cord end insertion piece clamping washers ii 632 is disposed at the lower end of the lower conductive rod 63 extending into the protective sleeve cavity 441 of the protective sleeve 44, and a second power cord end insertion piece clamping washer locking nut ii 633 is disposed at a position corresponding to the lower side of the pair of second power cord end insertion piece clamping washers ii 632.

In this embodiment, the boiler fixing flange 41 is fixed to the boiler port of the boiler by bolts and is horizontally installed, so that bolt holes 413 are formed around the boiler fixing flange 41 at intervals. As shown in fig. 1, the boiler fixing flange 41 of the present embodiment has a disk shape.

For a typical example of the application of the present embodiment to the boiler, see CN108469015A and CN108343938A mentioned in the background of the invention section by the applicant, and a plurality of the embodiments can be arranged on one boiler at intervals around the periphery of the boiler, or can be collected together, for example, four or six of the embodiments are collected on the heating pipe interface plate of the boiler.

Example 2:

referring to fig. 2, since the present embodiment 2 is screwed with the boiler port of the boiler, the boiler port mating external thread 414 is formed on the outer wall of the boiler fixing flange 41. As shown in fig. 2, the middle portion of the boiler fixing flange 41 of the present embodiment has a polygonal shape, such as a hexagon (also called a hexagon). The rest is the same as described in example 1.

In conclusion, the technical scheme provided by the invention overcomes the defects in the prior art, successfully completes the invention task and truly realizes the technical effects of the applicant in the technical effect column.

Claims

1. An electric heating tube comprises an insulating tube (1), wherein a resistance wire caulking groove (11) extending from one end of the insulating tube (1) to the other end is formed on the outer wall of the insulating tube (1) in a spiral state; the resistance wire (2) is wound on the outer wall of the insulating tube (1) along with the resistance wire caulking groove (11) and protrudes out of the surface of the outer wall of the insulating tube (1), and a space between resistance wire spiral coils formed on the outer wall of the insulating tube (1) by winding of the resistance wire (2) is formed into an electric isolation gap (12); the quartz glass tube (3) is covered outside the resistance wire (2), the open end of the quartz glass tube (3) faces the base fixing mechanism (4) and is fixed with the base fixing mechanism (4) in a sealing mode, the electric connection end portion of the resistance wire (2) is led into the base fixing mechanism (4) through the open end of the quartz glass tube (3), the quartz glass tube is characterized by further comprising an upper end electric connection mechanism (5) of the resistance wire and a lower end electric connection mechanism (6) of the resistance wire, the upper end electric connection mechanism (5) of the resistance wire is matched with the upper end of the insulating tube (1), the lower end electric connection mechanism (6) of the resistance wire is matched with the lower end of the insulating tube (1), and the upper end electric connection mechanism (5) of the resistance wire and the lower end electric connection mechanism (6) of the resistance wire are arranged at the position corresponding to the lower end of an insulating tube cavity (13) of the insulating tube (1) The quartz glass tube sealing device is characterized by being stretched to the base fixing mechanism (4), the upper end of the resistance wire (2) is connected with an electrical connection mechanism (5) at the upper end of the resistance wire, the lower end of the resistance wire (2) is connected with an electrical connection mechanism (6) at the lower end of the resistance wire, a quartz glass tube sealing skirt edge (31) which is outwards unfolded is formed at the opening end of the quartz glass tube (3) and surrounds the circumference direction of the quartz glass tube (3), and the quartz glass tube sealing skirt edge (31) is sealed and fixed with the base fixing mechanism (4); an electrical isolation filling layer (121) is arranged in the electrical isolation gap (12), an insulation tube upper matching step groove (131) is formed at the upper end of the cavity wall of the insulation tube cavity (13) of the insulation tube (1) and around the circumferential direction of the insulation tube cavity, and an insulation tube lower matching step groove (132) is formed at the lower end of the cavity wall of the insulation tube cavity (13) of the insulation tube (1) and also around the circumferential direction of the insulation tube cavity (13); the upper end part of the resistance wire is electrically connected with the upper end of the insulating tube (1) by the electric connection mechanism (5) at the position corresponding to the matching stepped groove (131) on the insulating tube, and the lower end part of the resistance wire is electrically connected with the lower end of the insulating tube (1) by the electric connection mechanism (6) at the position corresponding to the matching stepped groove (132) below the insulating tube; the upper end of the resistance wire (2) is fixedly connected with the electrical connection mechanism (5) at the upper end of the resistance wire after penetrating into the electrical connection mechanism (5) at the upper end of the resistance wire, and the lower end of the resistance wire (2) is fixedly connected with the electrical connection mechanism (6) at the lower end of the resistance wire after penetrating into the electrical connection mechanism (6) at the lower end of the resistance wire; the quartz glass tube (3) is transparent; a skirt upper sealing ring (311) is arranged at a position corresponding to the upper part of the quartz glass tube sealing skirt (31), a skirt lower sealing washer (312) is arranged at a position corresponding to the lower part of the quartz glass tube sealing skirt (31), the quartz glass tube sealing skirt (31) and the base fixing mechanism (4) are sealed and fixed by the skirt upper sealing ring (311) and the skirt lower sealing washer (312), the resistance wire upper end part electric connecting mechanism (5) comprises an insulating tube upper matching joint (51), an upper transition conducting strip (52), an upper conducting rod (53), an upper conducting rod protecting sleeve (54) and a limiting sleeve (55), an upper matching stepped groove embedding ring (511) is formed on the insulating tube upper matching joint (51) and at a position corresponding to the insulating tube upper matching stepped groove (131) around the circumferential direction of the insulating tube upper matching joint (51), the upper matching step groove embedding stack ring (511) is in embedding matching with the upper matching step groove (131) on the insulating tube, an upper matching joint resistance wire guide hole (512) penetrating through the upper matching joint (51) on the insulating tube along the wall thickness direction is formed in the matching joint (51) on the insulating tube, the upper end of the resistance wire (2) penetrates into the inner side of the matching joint (51) on the insulating tube from the outer side of the matching joint (51) on the insulating tube at the position corresponding to the upper matching joint resistance wire guide hole (512) and is led to the upward side of the matching joint (51) on the insulating tube, one end of an upper transition conducting strip (52) is fixed with the upward side of the matching joint (51) on the insulating tube through an upper transition conducting strip fixing screw (521) at the position corresponding to the upper end of the resistance wire (2) in the state of clamping the upper end of the resistance wire (2), and the other end of the upper transition conducting strip (52) is sleeved on the upper end of an upper conducting rod (53) and is in rotary matching with the upper conducting rod (53) A pair of upper transition conducting strip locking nuts (522) at the upper end of the insulating tube (1) is locked, the lower end of the upper conducting rod (53) is fixed with the base fixing mechanism (4), an upper conducting rod protecting sleeve (54) is positioned in the insulating tube cavity (13) of the insulating tube (1) and sleeved in the middle of the upper conducting rod (53), and a limiting sleeve (55) is sleeved at the lower end of the upper conducting rod (53) and matched with the base fixing mechanism (4); the lower end part electrical connection mechanism (6) of the resistance wire comprises an insulating tube lower matching connector (61), a lower transition conducting strip (62), a lower conducting rod (63), a lower conducting rod protecting sleeve (64) and a limiting sleeve (65), a lower matching step groove embedding stack ring (611) is formed on the insulating tube lower matching connector (61) and surrounds the circumferential direction of the insulating tube lower matching connector (61) at the position corresponding to the insulating tube lower matching step groove (132), the lower matching step groove embedding stack ring (611) is in embedding fit with the insulating tube lower matching step groove (132), a lower matching connector resistance wire (612) penetrating through the insulating tube lower matching connector (61) along the wall thickness direction is arranged on the insulating tube lower matching connector (61), and the lower end of the resistance wire (2) penetrates into the insulating tube lower matching connector from the outer side of the insulating tube lower matching connector (61) at the position corresponding to the lower matching connector guiding hole (612) (61) The inner side of the lower transition conducting strip is led to the downward side of the lower matching joint (61) of the insulating tube, one end of the lower transition conducting strip (62) is fixed with the downward side of the lower matching joint (61) of the insulating tube through a lower transition conducting strip fixing screw at a position corresponding to the lower end of the resistance wire (2) and in a state of clamping the lower end of the resistance wire (2), the other end of the lower transition conducting strip (62) is sleeved at the upper end of the lower conducting rod (63) and is locked by a pair of lower transition conducting strip locking nuts (621) which are screwed at the upper end of the lower conducting rod (63), the lower end of the lower conducting rod (63) is fixed with the base fixing mechanism (4), and a lower conducting rod protecting sleeve (64) and a limiting sleeve (65) are respectively sleeved at the middle part and the lower part of the lower conducting rod (63) and are matched with the base fixing mechanism (4); the skirt upper sealing ring (311) sleeved on the quartz glass tube (3) and positioned at the upper part of the quartz glass tube sealing skirt (31) is a silicon rubber ring, and the skirt lower sealing washer (312) corresponding to the lower part of the quartz glass tube sealing skirt (31) is a polytetrafluoroethylene washer.

2. The electric heating pipe according to claim 1, wherein the base fixing means (4) comprises a boiler fixing flange (41), a transition connection screw sleeve (42), an insulating support plate (43) and a protective sleeve (44), the boiler fixing flange (41) is bolted or screwed to the boiler in the use state, a sealing ring defining edge (411) is formed on the upper portion of the inner wall of the boiler fixing flange (41), and an internal flange thread (412) is formed on the inner wall of the boiler fixing flange (41), the transition connection screw sleeve (42) corresponds to the lower portion of the insulating support plate (43) and a transition connection screw sleeve external thread (421) is formed on the outer wall of the transition connection screw sleeve (42), the internal flange thread (412) is engaged and fixed with the transition connection screw sleeve external thread (421) formed on the upper portion of the outer wall of the transition connection screw sleeve (42), the insulating supporting disc (43) is supported on the transition connection threaded sleeve (42) at a position corresponding to the lower part of the skirt lower sealing washer (312), the protective sleeve (44) is provided with a protective sleeve cavity (441), a protective sleeve inner wall thread (4411) is formed on the inner wall of the upper part of the protective sleeve cavity (441), the protective sleeve inner wall thread (4411) is matched and fixed with the transition connection threaded sleeve external thread (421) formed on the lower part of the outer wall of the transition connection threaded sleeve (42) in a threaded manner, and a power line guide hole (442) is formed in the central position of the bottom of the protective sleeve (44); the lower end of the upper conducting rod protecting sleeve (54) is supported on the upward side of the insulating support disc (43), the upper end surface of the limiting sleeve (55) is attached to the downward side surface of the insulating support disc (43), the lower end of the upper conducting rod (53) penetrates through the limiting sleeve (55) and then extends into the protective sleeve cavity (441) and is locked by an upper conducting rod locking nut (531) screwed on the lower end of the upper conducting rod (53), and the limiting sleeve (55) is limited by the attachment of the upper surface of the upper conducting rod locking nut (531) to the lower surface of the limiting sleeve (55); the lower conducting rod protecting sleeve (64) is supported on the insulating supporting disk (43), the upper end surface of the limiting sleeve (65) is in contact with the downward side surface of the insulating supporting disk (43), the lower end of the lower conducting rod (63) penetrates through the limiting sleeve (65) and then extends into the protecting sleeve cavity (441) and is locked by a lower conducting rod locking nut (631) which is screwed on the lower end of the lower conducting rod (63), and the limiting sleeve (65) is limited by the contact between the upper surface of the lower conducting rod locking nut (631) and the lower surface of the limiting sleeve (65); the quartz glass tube sealing skirt (31) of the quartz glass tube (3) together with the skirt upper sealing ring (311) and the skirt lower sealing washer (312) are arranged between the downward side of the sealing ring limiting edge (411) and the edge part of the upward side of the insulating supporting disc (43).

3. Electric heating tube according to claim 1, characterized in that the insulating tube (1) is a ceramic tube; the resistance wire (2) is a nickel wire or an iron chromium aluminum wire; the electric isolation filling and blocking layer (121) is aluminum dihydrogen phosphate or aluminum oxide filling and blocking agent.

4. The electric heating tube according to claim 1 or 2, characterized in that the quartz glass tube (3) is a high temperature resistant, corrosion resistant quartz glass tube.

5. The electric heating tube of claim 1, wherein the upper insulating tube fitting (51) and the lower insulating tube fitting (61) are stainless steel.

6. Electric heating tube according to claim 1 or 2, characterized in that the limiting sleeve (55), the lower conducting rod protecting sleeve (64) and the lower limiting sleeve (65) are ceramic sleeves.

7. The electric heating tube according to claim 2, characterized in that the insulating support disc (43) is a high temperature resistant insulating disc, which is a mica disc.

8. The electric heating tube of claim 2, wherein a pair of first power cord end insertion piece clamping washers i (532) are provided at a lower end of the upper conductive rod (53) extending into the protective sheath chamber (441) of the protective sheath (44), and a first power cord end insertion piece clamping washer locking nut i (533) is rotatably provided at a position corresponding to a lower side of the first power cord end insertion piece clamping washer i (532); a pair of second power cord end insertion piece clamping gaskets II (632) is arranged at the lower end of the lower conducting rod (63) extending into a protective sleeve cavity (441) of the protective sleeve (44), and a second power cord end insertion piece clamping gasket locking nut II (633) is screwed at a position corresponding to the lower part of the pair of second power cord end insertion piece clamping gaskets II (632); when the boiler fixing flange (41) is fixed with a boiler interface of a boiler through bolts, bolt holes (413) are arranged at intervals on the periphery of the boiler fixing flange (41), and when the boiler fixing flange (41) is fixed with the boiler interface of the boiler through threads, boiler interface matching external threads (414) are formed on the outer wall of the boiler fixing flange (41).