An explosion-proof electric heater with good heat conduction effect and an assembling method thereof

Abstract

The application relates to the technical field of heaters, in particular to an anti-explosion electric heater with good heat conduction effect and an assembling method thereof. The anti-explosion electric heater comprises a connecting pipe, a heating cavity is formed in the connecting pipe, a first ceramic pipe is arranged in the heating cavity, a second ceramic pipe is arranged in the first ceramic pipe, a plurality of strip-shaped grooves are arranged in the second ceramic pipe, a first locking hole is arranged in each strip-shaped groove, a spiral heating wire is arranged on the second ceramic pipe, a guide structure is arranged on the second ceramic pipe and can guide the spiral heating wire to move along the strip-shaped grooves, a locking structure is arranged on the second ceramic pipe and can make a locking part inserted into the first locking hole, and an axial connecting mechanism is arranged on the second ceramic pipe and comprises an axial connecting assembly, an elastic pulling assembly and a rotating sleeve. The axial connecting assembly can axially lock the first guide and the second ceramic pipe, the rotating sleeve can drive the elastic pulling assembly to act, and the axial connecting assembly can contact the first guide and the second ceramic pipe in the axial locking state, so that the spiral heating wire can be conveniently installed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heaters, in particular to an explosion-proof electric heater with good heat conduction effect and an assembling method thereof. BACKGROUND

[0002] The electric heater is a device for converting electric energy into heat energy to achieve electric heating. The heating mechanism generally utilizes the Joule effect of electric current to generate heat when electric current passes through the resistance heating material to heat the material.

[0003] The conventional electric heater on the market adopts resistance wires placed in a metal tube, and magnesium powder is filled in the metal tube to achieve insulation between the resistance wires and the metal tube. In the application scenario of the conventional heating tube, the resistance wires transfer heat to the magnesium powder, the magnesium powder transfers heat to the heating tube wall, and the heating tube wall transfers heat to the heating medium. In use, there is a lag in temperature feedback.

[0004] In the production process, the resistance wires cannot be observed by the naked eye when they are assembled in the tube. Only after the assembly is completed can X-rays be used for detection, and the defective heating tube can only be scrapped and cannot be corrected in reverse, resulting in serious production waste. SUMMARY

[0005] The purpose of the present application is to provide an explosion-proof electric heater with good heat conduction effect and an assembling method thereof to solve the problems raised in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] An explosion-proof electric heater with good heat conduction effect comprises:

[0008] A connecting pipe is formed with a heating cavity inside, and a first ceramic pipe coaxial with the connecting pipe is arranged inside the heating cavity.

[0009] A second ceramic pipe is detachably mounted inside the first ceramic pipe.

[0010] A plurality of groups of strip-shaped grooves are circumferentially and equidistantly arranged on the inner wall of the first ceramic pipe, and a first locking hole penetrating the inside and outside of the first ceramic pipe is arranged in the strip-shaped groove.

[0011] A spiral heating wire is arranged on the second ceramic pipe and adheres to the inner wall of the first ceramic pipe.

[0012] A guide structure is connected with the second ceramic pipe, and the guide structure comprises a first guide member and a second guide member. The first guide member and the second guide member can guide the spiral heating wire to move along the strip-shaped groove.

[0013] A locking structure is arranged between the first guide and the second ceramic tube and is formed with a locking portion, and the locking structure is capable of inserting the locking portion into the first locking hole when the second ceramic tube rotates;

[0014] An axial connecting mechanism is arranged between the second guide and the second ceramic tube, and the axial connecting mechanism comprises an axial connecting assembly, an elastic pulling assembly and a rotating sleeve, the axial connecting assembly is capable of axially locking the first guide and the second ceramic tube, the rotating sleeve is capable of driving the elastic pulling assembly to act, and the axial connecting assembly is in contact with the axial locking state of the first guide and the second ceramic tube.

[0015] As a further scheme of the present application, the first guide and the second ceramic tube are rotationally connected.

[0016] The locking structure comprises a plurality of groups of sliding grooves arranged at equal distances on the first guide in a circumferential direction, a sliding block is slidingly arranged in the sliding groove, the sliding block is connected with the locking portion, and a fitting shaft is arranged on the sliding block.

[0017] The locking structure further comprises a driving groove arranged at the end of the second ceramic tube, and the fitting shaft is capable of sliding in the driving groove.

[0018] As a further scheme of the present application, the driving groove comprises a circular arc groove arranged at the end of the second ceramic tube and an inclined groove in communication with the circular arc groove, the center of the circular arc groove is concentric with the center of the second ceramic tube, and the distance between the inclined groove and the center of the second ceramic tube gradually shortens in a direction away from the circular arc groove.

[0019] When the second ceramic tube rotates, the fitting shaft is capable of moving along the circular arc groove and the inclined groove, and the locking portion is inserted into the first locking hole.

[0020] As a further scheme of the present application, the rotating sleeve is rotationally connected with the second ceramic tube, and the rotating sleeve is rotationally connected with the second guide.

[0021] The elastic pulling assembly comprises a follower slidingly arranged on the second ceramic tube, and the follower is connected with the rotating sleeve through a limiting structure.

[0022] The end of the second ceramic tube is further sleeved with a cylindrical spring, one end of the cylindrical spring is connected with the follower, and the other end of the cylindrical spring is connected with the second guide.

[0023] The elastic pulling assembly further comprises an abutting sleeve assembly connecting the follower and the second guide.

[0024] As a further solution of the present invention: the limiting structure includes a plurality of limiting blocks equidistantly arranged on the follower and a plurality of limiting grooves arranged on the rotating sleeve, and the limiting grooves are slidably connected to the limiting blocks.

[0025] As a further embodiment of the present invention, the abutment assembly includes a plurality of abutment shafts equidistantly arranged on the follower and a plurality of arc-shaped plates equidistantly arranged on the second guide, wherein trigger grooves are formed in the arc-shaped plates, and the abutment shafts are capable of sliding in the trigger grooves.

[0026] A first inclined surface and a second inclined surface are provided on a side of the triggering groove away from the second guide member, and a protrusion is formed at a connection between the first inclined surface and the second inclined surface.

[0027] As a further embodiment of the present invention, the axial connection assembly includes a connection piece slidably mounted on the second ceramic tube and a second locking hole provided on the first guide piece, wherein the connection piece is provided with a locking rod capable of passing through the guide hole provided along the length direction of the second ceramic tube;

[0028] When the locking rod is inserted into the second locking hole, the second ceramic tube and the first guide member can be axially locked;

[0029] The axial connection assembly further includes a differential structure connecting the follower and the connection member.

[0030] As a further solution of the present invention: the differential structure includes an arc-shaped through hole provided on the connecting member and a sheave rotatably connected to the follower, and the sheave can roll in the arc-shaped through hole.

[0031] A method for assembling an explosion-proof electric heater with good thermal conductivity as described above comprises the following steps:

[0032] Step 1: Place the first guide member into the strip-shaped groove and push the second ceramic tube toward the inside of the first ceramic tube;

[0033] Step 2: Rotate the rotating sleeve to activate the elastic traction assembly;

[0034] Step 3: The elastic traction component drives the axial connection component to move, so that the axial locking between the first guide member and the second ceramic tube is released;

[0035] Step 4: The elastic traction component continues to move, causing the second ceramic tube to rotate, and under the action of the locking structure, the locking portion can be inserted into the first locking hole, thereby completing the installation of the second ceramic tube and the spiral heating wire.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The spiral heating wire is provided so that the spiral heating wire can directly contact the air entering the heating cavity to perform heat exchange, without the need for magnesium powder to transfer heat, resulting in better heating effect, faster heating speed, higher temperature control accuracy, and achieving zero lag effect of temperature control;

[0038] By providing the guide structure and the strip groove, under the action of the first guide member and the second guide member, on the one hand, a guiding and limiting effect can be generated on the spiral heating wire when the second ceramic tube and the spiral heating wire are inserted into the first ceramic tube, so that the outer protrusion of the spiral heating wire can face the strip groove, thereby reducing the friction between the spiral heating wire and the inner wall of the first ceramic tube during installation, ensuring the structural completeness of the spiral heating wire and avoiding excessive wear of the spiral heating wire. On the other hand, the installed spiral heating wire can be coaxial with the first ceramic tube, and the protruding position of the spiral heating wire can be in contact with the inner wall of the first ceramic tube, so that the heat on the spiral heating wire can be evenly transferred to the first ceramic tube, thereby improving the uniformity of heat exchange between the gas and the spiral heating wire and the first ceramic tube, and improving the heating effect.

[0039] By providing a locking structure, when the second ceramic tube is rotated, the locking portion can be inserted into the first locking hole, thereby achieving locking of the first guide member and the first ceramic tube. At this time, it can prevent the first guide member from sliding relative to the first ceramic tube, causing the second guide member to slip off the first ceramic tube, resulting in non-coaxiality between the spiral heating wire and the first ceramic tube, thereby improving the stability of the first guide member, the spiral heating wire and the second guide member in the assembled state, and further ensuring the heating effect;

[0040] By setting up the axial connection mechanism, when the rotating sleeve is rotated, the locking rod can be pulled, and the locking rod can be separated from the second locking hole, so as to release the axial locking between the first guide member and the second ceramic tube, and in the process of continuous rotation of the rotating sleeve, the second ceramic tube is rotated, and the locking part is driven to be inserted into the first locking hole, so that the axial locking of the first guide member and the spiral heating wire can be carried out at the same time as the locking distribution of the first guide member and the first ceramic tube, thereby improving the connection stability between the second ceramic tube, the spiral heating wire and the first ceramic tube in the assembled state. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a structural diagram of an embodiment of an explosion-proof electric heater with good thermal conductivity.

[0042] Figure 2 This is a schematic structural diagram of an explosion-proof electric heater with good thermal conductivity after the insulation layer is removed.

[0043] Figure 3 A cross-sectional view of an embodiment of the explosion-proof electric heater with good heat conduction effect.

[0044] Figure 4 A side view of the helical heating wire and the first ceramic tube in an embodiment of the explosion-proof electric heater with good heat conduction effect.

[0045] Figure 5 A schematic view of the internal structure of the first ceramic tube in an embodiment of the explosion-proof electric heater with good heat conduction effect.

[0046] Figure 6 A structure of Figure 5 A structure of

[0047] Figure 7 A structure of the locking structure in an embodiment of the explosion-proof electric heater with good heat conduction effect.

[0048] Figure 8 A schematic view of the locking structure in an embodiment of the explosion-proof electric heater with good heat conduction effect.

[0049] Figure 9 A structure of Figure 5 A structure of

[0050] Figure 10 A schematic view of the axial connection mechanism in an embodiment of the explosion-proof electric heater with good heat conduction effect.

[0051] Figure 11 An exploded view of the axial connection mechanism in an embodiment of the explosion-proof electric heater with good heat conduction effect.

[0052] Figure 12 Two position state diagrams of the abutting shaft in an embodiment of the explosion-proof electric heater with good heat conduction effect.

[0053] In the figure: 1, helical heating wire; 2, connecting tube; 3, thermocouple; 4, first ceramic tube; 401, strip-shaped groove; 402, first locking hole; 5, second ceramic tube; 501, circular-arc groove; 502, inclined groove; 503, guide hole; 6, heat preservation layer; 7, cover plate; 8, first guide; 801, sliding groove; 802, second locking hole; 9, sliding block; 901, locking part; 902, fitting shaft; 10, second guide; 11, rotating sleeve; 1101, limiting groove; 12, follower; 1201, limiting block; 13, abutting shaft; 14, arc-shaped plate; 1401, first inclined surface; 1402, second inclined surface; 1403, protruding part; 15, cylindrical spring; 16, groove wheel; 17, connecting piece; 1701, arc-shaped through hole; 18, locking rod. DETAILED DESCRIPTION

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0055] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0056] See also Figures 1 to 12 In an embodiment of the present invention, an explosion-proof electric heater with good thermal conductivity includes: a connecting tube 2, a second ceramic tube 5, a plurality of groups of strip grooves 401, a spiral heating wire 1, a guide structure, a locking structure and an axial connection mechanism.

[0057] A heating cavity is formed in the connecting tube 2, and a first ceramic tube 4 coaxial with the connecting tube 2 is provided in the heating cavity. An insulation layer 6 is also provided on the outside of the connecting tube 2, and a cover plate 7 is provided at the end of the connecting tube 2. Furthermore, the connecting tube 2 is formed by connecting two tubular structures, and the two tubular structures are connected by bolts to facilitate the installation of the second ceramic tube 5 and the spiral heating wire 1 after disassembly;

[0058] The second ceramic tube 5 is detachably mounted in the first ceramic tube 4, and a thermocouple 3 is provided in the first ceramic tube 4. The thermocouple 3 controls the heating power of the spiral heating wire 1 by detecting the temperature change of the gas, so that the gas can be stably maintained at the target temperature.

[0059] A plurality of groups of strip-shaped grooves 401 are equidistantly arranged on the inner wall of the first ceramic tube 4 circumferentially, and a first locking hole 402 penetrating the inside and outside of the first ceramic tube 4 is arranged in the strip-shaped grooves 401 ;

[0060] The spiral heating wire 1 is arranged on the second ceramic tube 5 and is in contact with the inner wall of the first ceramic tube 4. When working, the spiral heating wire 1 can directly contact the air entering the heating cavity, thereby performing heat exchange, so that the heating effect is better, the heating speed is faster, and the temperature control accuracy is higher, and a zero lag effect can be achieved. Specifically, the side view of the spiral heating wire 1 is a hexagonal structure. At this time, the side view of the spiral heating wire 1 can be regarded as having six groups of protrusions;

[0061] The guiding structure is connected to the second ceramic tube 5 , and includes a first guiding member 8 and a second guiding member 10 . The first guiding member 8 and the second guiding member 10 can guide the spiral heating wire 1 to move along the strip-shaped groove 401 .

[0062] In the initial state, under the action of the axial connection mechanism, the first guide 8, the second ceramic tube 5 and the second guide 10 are in an axially locked state, so that during installation, when the first guide 8 is inserted into the strip groove 401, the first guide 8 can guide the protruding position of the spiral heating wire 1 to face the strip groove 401, thereby reducing the friction between the spiral heating wire 1 and the inner wall of the first ceramic tube 4 during the process of inserting the spiral heating wire 1 into the first ceramic tube 4, thereby avoiding wear of the spiral heating wire 1 caused by friction between the spiral heating wire 1 and the first ceramic tube 4.

[0063] And when the first guide member 8 moves to the end of the stroke, the second guide member 10 just moves to the end of the first ceramic tube 4 and is also inserted into the strip groove 401, so that under the action of the first guide member 8 and the second guide member 10, the second ceramic tube 5, the spiral heating wire 1 and the first ceramic tube 4 can be in a coaxial state, thereby improving the uniformity of the gas entering the first ceramic tube 4 and exchanging heat with the spiral heating wire 1, and when the second ceramic tube 5 rotates, the spiral heating wire 1 connected to it will also rotate until the spiral heating wire 1 fits against the inner wall of the first ceramic tube 4. At this time, the heat on the spiral heating wire 1 can be evenly transferred to the first ceramic tube 4, further improving the uniformity of gas heating and the heating effect.

[0064] Through the above-mentioned arrangement, under the action of the first guide member 8 and the second guide member 10, on the one hand, a guiding and limiting effect can be generated on the spiral heating wire 1 when the second ceramic tube 5 and the spiral heating wire 1 are inserted into the first ceramic tube 4, so that the outer protrusion of the spiral heating wire 1 can face the strip groove 401, so as to reduce the friction between the spiral heating wire 1 and the inner wall of the first ceramic tube 4 during the installation process, ensure the structural completeness of the spiral heating wire 1, and avoid excessive wear of the spiral heating wire 1. On the other hand, the installed spiral heating wire 1 can be coaxial with the first ceramic tube 4, and the protruding position of the spiral heating wire 1 can be in contact with the inner wall of the first ceramic tube 4, so that the heat on the spiral heating wire 1 can be evenly transferred to the first ceramic tube 4, thereby improving the uniformity of heat exchange between the gas and the spiral heating wire 1 and the first ceramic tube 4, and improving the heating effect.

[0065] See also Figures 6 to 8 The locking structure is provided between the first guide member 8 and the second ceramic tube 5 and is formed with a locking portion 901. The locking structure enables the locking portion 901 to be inserted into the first locking hole 402 when the second ceramic tube 5 rotates.

[0066] The first guide member 8 is rotatably connected to the second ceramic tube 5. The locking structure includes a plurality of chute grooves 801 equidistantly arranged on the first guide member 8. A slider 9 is slidably installed in the chute grooves 801. The slider 9 is connected to the locking portion 901 and an engaging shaft 902 is provided on the slider 9.

[0067] The locking structure further includes a driving groove provided at the end of the second ceramic tube 5, wherein the engaging shaft 902 is capable of sliding in the driving groove. The driving groove includes a circular arc groove 501 provided at the end of the second ceramic tube 5 and an inclined groove 502 connected to the circular arc groove 501. The center of the circular arc groove 501 is concentric with the center of the second ceramic tube 5, and the distance between the inclined groove 502 and the center of the second ceramic tube 5 gradually shortens in a direction away from the circular arc groove 501.

[0068] When the second ceramic tube 5 rotates, the engaging shaft 902 can move along the arc groove 501 and the inclined groove 502 , so that the locking portion 901 is inserted into the first locking hole 402 .

[0069] In the initial state, the engaging shaft 902 is at the end of the inclined groove 502 away from the arc groove 501. At this time, the end of the locking portion 901 away from the slider 9 is coplanar with the side wall of the first guide member 8, so that when the first guide member 8 is inserted into the strip groove 401, no interference will occur. When the first guide member 8 moves to the end of the stroke and the second guide member 10 is placed in the first ceramic tube 4, the second ceramic tube 5 is rotated to enable the engaging shaft 902 to move along the inclined groove 502 and the arc groove 501 in turn. When the engaging shaft 902 moves along the inclined groove 502, the engaging shaft 902 The shaft 902 can drive the slider 9 to move along the length direction of the slide groove 801, so that the locking part 901 can be inserted into the first locking hole 402, thereby realizing the locking of the first guide member 8 and the first ceramic tube 4 to prevent the first guide member 8 from sliding relative to the first ceramic tube 4 during use, causing the second guide member 10 to slip off the first ceramic tube 4, resulting in non-coaxiality between the spiral heating wire 1 and the first ceramic tube 4, thereby improving the stability of the first guide member 8, the spiral heating wire 1 and the second guide 10 in the assembled state.

[0070] Furthermore, when the interlocking shaft 902 moves into the arc groove 501, since the arc groove 501 is coaxial with the second ceramic tube 5, if the slider 9 is subjected to a reverse force and the interlocking shaft 902 acts on the side wall of the arc groove 501, the second ceramic tube 5 will not be reversed, thereby further improving the stability of the first guide member 8, the spiral heating wire 1 and the second guide member 10 in the assembled state.

[0071] Through the above-mentioned arrangement, when the second ceramic tube 5 is rotated, the locking portion 901 can be inserted into the first locking hole 402, thereby realizing the locking of the first guide member 8 and the first ceramic tube 4. At this time, the first guide member 8 can be prevented from sliding relative to the first ceramic tube 4, causing the second guide member 10 to slip off the first ceramic tube 4, resulting in non-coaxiality between the spiral heating wire 1 and the first ceramic tube 4, thereby improving the stability of the first guide member 8, the spiral heating wire 1 and the second guide 10 in the assembled state, and further ensuring the heating effect.

[0072] See also Figure 11 The axial connection mechanism is provided between the second guide 10 and the second ceramic tube 5, and includes an axial connection component, an elastic pulling component, and a rotating sleeve 11. The axial connection component can axially lock the first guide 8 and the second ceramic tube 5. The rotating sleeve 11 can drive the elastic pulling component to operate, so that the axial connection component contacts the axial locking state of the first guide 8 and the second ceramic tube 5;

[0073] The axial connection assembly includes a connection piece 17 that is slidably mounted on the second ceramic tube 5 and a second locking hole 802 provided on the first guide piece 8. The connection piece 17 is provided with a locking rod 18 that can pass through the guide hole 503 provided along the length direction of the second ceramic tube 5.

[0074] When the locking rod 18 is inserted into the second locking hole 802 , the second ceramic tube 5 and the first guide member 8 can be axially locked;

[0075] The axial connection assembly further includes a differential structure connecting the follower 12 and the connector 17 .

[0076] In the initial state, the locking rod 18 is in a state of passing through the guide hole 503 and inserted into the second locking hole 802. At this time, the first guide member 8 is in a state of axial locking with the second ceramic tube 5, so that when the first guide member 8 moves along the strip groove 401, it can produce a limiting effect on the spiral heating wire 1 to prevent the two from rubbing in the process of injecting the spiral heating wire 1 into the first ceramic tube 4. When the first guide member 8 moves to the end of the stroke and the second guide member 10 also enters the strip groove 401, the rotating sleeve 11 is rotated. At this time, the axial connection component connected to the rotating sleeve 11 will be activated and pulled by the differential structure. The connecting piece 17 is connected to the second locking hole 802, so that the locking rod 18 can be separated from the second locking hole 802. At this time, the axial locking between the first guide piece 8 and the second ceramic tube 5 can be released, and when the connecting piece 17 is further rotated, the connecting piece 17 can drive the second ceramic tube 5 to rotate through the locking rod 18, so that the locking portion 901 can be inserted into the first locking hole 402, and the first guide piece 8 can be locked with the first ceramic tube 4, that is, the axial locking of the first guide piece 8 and the spiral heating wire 1 can be carried out in the same manner as the locking distribution of the first guide piece 8 and the first ceramic tube 4, thereby ensuring that the spiral heating wire 1 will not wear out and improving the stability of the first guide piece 8 after assembly is completed.

[0077] See also Figure 9 、 Figure 11-12 The differential structure includes an arc-shaped through hole 1701 provided on the connecting member 17 and a sheave 16 rotatably connected to the follower 12 , and the sheave 16 is capable of rolling in the arc-shaped through hole 1701 ;

[0078] The rotating sleeve 11 is rotatably connected to the second ceramic tube 5 , and the rotating sleeve 11 is rotatably connected to the second guide member 10 ;

[0079] The elastic traction assembly includes a follower 12 slidably sleeved on the second ceramic tube 5, and the follower 12 is connected to the rotating sleeve 11 via a limiting structure. The limiting structure includes a plurality of groups of limiting blocks 1201 equidistantly arranged on the follower 12 and a plurality of groups of limiting grooves 1101 arranged on the rotating sleeve 11, and the limiting grooves 1101 are slidably connected to the limiting blocks 1201;

[0080] The end of the second ceramic tube 5 is also sleeved with a cylindrical spring 15, one end of the cylindrical spring 15 is connected to the follower 12, and the other end is connected to the second guide 10;

[0081] The elastic traction assembly further includes an abutment set connecting the follower 12 and the second guide member 10, the abutment set including a plurality of abutment shafts 13 equidistantly arranged on the follower 12 and a plurality of arc-shaped plates 14 equidistantly arranged on the second guide member 10, wherein trigger grooves are formed in the arc-shaped plates 14, and the abutment shafts 13 are capable of sliding in the trigger grooves;

[0082] A first inclined surface 1401 and a second inclined surface 1402 are provided on a side of the triggering slot away from the second guide member 10 , and a protrusion 1403 is formed at the connection between the first inclined surface 1401 and the second inclined surface 1402 .

[0083] In the initial state, the cylindrical spring 15 is in a compressed state, and the abutting shaft 13 is in a state where the second inclined surface 1402 is away from the protruding portion 1403 (see FIG. Figure 12 In this state, there is also a certain axial limiting force between the second guide 10 and the second ceramic tube 5, so that there is a certain axial locking force between the first guide 8, the second ceramic tube 5 and the second guide 10.

[0084] When the second guide member 10 is also inserted into the strip groove 401, the rotating sleeve 11 is rotated. At this time, the rotating sleeve 11 can rotate relative to the second guide member 10. At the same time, under the action of the limiting groove 1101 and the limiting block 1201, the follower 12 will also rotate with the rotating sleeve 11, and the abutment shaft 13 can move along the second inclined surface 1402 toward the protrusion 1403 to further compress the cylindrical spring 15. At this time, the abutment shaft 13 can move toward the rotating sleeve 11 by a certain stroke, thereby pulling the connecting member 17 to move through the groove wheel 16, and separating the locking rod 18 from the second locking hole 802, thereby releasing the axial locking of the first guide member 8 and the second ceramic tube 5. In this process, the groove wheel 16 moves along the arc The arc-shaped through hole 1701 moves, so that the second ceramic tube 5 will not rotate. After the abutment shaft 13 moves along the second inclined surface 1402 and passes the protrusion 1403, the groove wheel 16 abuts against the end of the arc-shaped through hole 1701. At the same time, the cylindrical spring 15 can drive the abutment shaft 13 to move along the first inclined surface 1401 by releasing elastic potential energy. At this time, the connecting member 17 will rotate with the follower 12 and, driven by the locking rod 18, the second ceramic tube 5 is rotated, so that the locking portion 901 can be inserted into the first locking hole 402, thereby realizing the locking between the first guide member 8 and the first ceramic tube 4, and improving the connection stability between the second ceramic tube 5, the spiral heating wire 1 and the first ceramic tube 4 in the assembled state.

[0085] Furthermore, after the abutment shaft 13 moves past the protrusion 1403, when the engaging shaft 902 moves to the end of the arc groove 501, the second ceramic tube 5 stops rotating. At this time, the abutment shaft 13 can only move a certain displacement along the first inclined surface 1401 (see FIG. Figure 12 In the solid coil position, in this state, the locking rod 18 is still separated from the second locking hole 802, and at this time the cylindrical spring 15 still exerts an elastic force on the abutment shaft 13, so that the abutment shaft 13 still has a tendency to move along the first inclined surface 1401. Under this tendency, the position stability of the follower 12 and the connecting member 17 can be improved, thereby ensuring that the connecting member 17 does not rotate in the opposite direction, and making the connection state between the locking portion 901 and the first locking hole 402 more stable.

[0086] Through the above-mentioned arrangement, when the rotating sleeve 11 is rotated, the locking rod 18 can be pulled, and the locking rod 18 can be separated from the second locking hole 802 to release the axial locking between the first guide member 8 and the second ceramic tube 5, and in the process of continuous rotation of the rotating sleeve 11, the second ceramic tube 5 is rotated, and the locking part 901 is driven to be inserted into the first locking hole 402, so that the axial locking of the first guide member 8 and the spiral heating wire 1 can be carried out at the same time as the locking distribution of the first guide member 8 and the first ceramic tube 4, thereby improving the connection stability between the second ceramic tube 5, the spiral heating wire 1 and the first ceramic tube 4 in the assembled state.

[0087] An assembly method of the explosion-proof electric heater with good heat conduction effect as described, comprising the following steps:

[0088] Step one: place the first guide 8 into the strip-shaped groove 401, and push the second ceramic tube 5 towards the inside of the first ceramic tube 4;

[0089] Step two: rotate the rotating sleeve 11 to make the elastic traction assembly act;

[0090] Step three: the elastic traction assembly drives the axial connection assembly to act, so as to release the axial locking between the first guide 8 and the second ceramic tube 5;

[0091] Step four: the elastic traction assembly continues to act, so as to rotate the second ceramic tube 5, and under the action of the locking structure, the locking part 901 can be inserted into the first locking hole 402, thereby completing the installation of the second ceramic tube 5 and the spiral heating wire 1.

[0092] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to encompass all changes falling within the meaning and range of equivalents of the claims. Any reference signs in the claims should not be considered as limiting the claims to which they relate.

[0093] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. An explosion-proof electric heater with good thermal conductivity, comprising: A connecting tube (2), wherein a heating cavity is formed in the connecting tube (2), and a first ceramic tube (4) coaxial with the connecting tube (2) is provided in the heating cavity; A second ceramic tube (5) is detachably mounted in the first ceramic tube (4); It is characterized by further comprising: A plurality of groups of strip grooves (401), the plurality of groups of strip grooves (401) being equidistantly arranged on the inner wall of the first ceramic tube (4) in a circumferential manner, and a first locking hole (402) penetrating the inside and outside of the first ceramic tube (4) being provided in the strip grooves (401); A spiral heating wire (1) is arranged on the second ceramic tube (5) and is in contact with the inner wall of the first ceramic tube (4); a guiding structure connected to the second ceramic tube (5), the guiding structure comprising a first guiding member (8) and a second guiding member (10), the first guiding member (8) and the second guiding member (10) being capable of guiding the spiral heating wire (1) to move along the strip-shaped groove (401); a locking structure, disposed between the first guide member (8) and the second ceramic tube (5) and forming a locking portion (901), wherein the locking structure is capable of inserting the locking portion (901) into the first locking hole (402) when the second ceramic tube (5) rotates; An axial connection mechanism is provided between the second guide member (10) and the second ceramic tube (5), the axial connection mechanism comprising an axial connection assembly, an elastic traction assembly and a rotating sleeve (11), the axial connection assembly being capable of axially locking the first guide member (8) and the second ceramic tube (5), the rotating sleeve (11) being capable of driving the elastic traction assembly to operate, thereby causing the axial connection assembly to contact the first guide member (8) and the second ceramic tube (5) in an axially locked state; The rotating sleeve (11) is rotatably connected to the second ceramic tube (5), and the rotating sleeve (11) is rotatably connected to the second guide member (10); The elastic traction assembly comprises a follower (12) slidably sleeved on the second ceramic tube (5), and the follower (12) is connected to the rotating sleeve (11) via a limiting structure; The end of the second ceramic tube (5) is also sleeved with a cylindrical spring (15), one end of the cylindrical spring (15) is connected to the follower (12), and the other end is connected to the second guide (10); The elastic traction assembly further comprises an abutment kit connecting the follower (12) and the second guide (10); The limiting structure comprises a plurality of groups of limiting blocks (1201) equidistantly arranged on the follower (12) and a plurality of groups of limiting grooves (1101) arranged on the rotating sleeve (11), wherein the limiting grooves (1101) are slidably connected to the limiting blocks (1201); The abutment kit comprises a plurality of abutment shafts (13) equidistantly arranged on the follower (12) and a plurality of arc-shaped plates (14) equidistantly arranged on the second guide (10), wherein trigger grooves are formed in the arc-shaped plates (14), and the abutment shafts (13) are capable of sliding in the trigger grooves; A first inclined surface (1401) and a second inclined surface (1402) are provided on a side of the trigger groove facing away from the second guide member (10), and a protrusion (1403) is formed at the connection between the first inclined surface (1401) and the second inclined surface (1402); The axial connection assembly comprises a connection piece (17) slidably sleeved on the second ceramic tube (5) and a second locking hole (802) provided on the first guide piece (8); a locking rod (18) is provided on the connection piece (17); the locking rod (18) is capable of passing through a guide hole (503) provided along the length direction of the second ceramic tube (5); When the locking rod (18) is inserted into the second locking hole (802), the second ceramic tube (5) and the first guide member (8) can be axially locked; The axial connection assembly further includes a differential structure connecting the follower (12) and the connection member (17).

2. The explosion-proof electric heater with good thermal conductivity according to claim 1, characterized in that: The first guide member (8) is rotatably connected to the second ceramic tube (5); The locking structure comprises a plurality of groups of slide grooves (801) on the first guide member (8) arranged at equal intervals in a circumference, a slider (9) being slidably mounted in the slide groove (801), the slider (9) being connected to the locking portion (901), and a fitting shaft (902) being provided on the slider (9); The locking structure further comprises a driving groove provided at the end of the second ceramic tube (5), and the engaging shaft (902) is capable of sliding in the driving groove.

3. The explosion-proof electric heater with good thermal conductivity according to claim 2, characterized in that: The driving groove comprises an arc groove (501) provided at the end of the second ceramic tube (5) and an inclined groove (502) communicating with the arc groove (501), the center of the arc groove (501) is concentric with the center of the second ceramic tube (5), and the distance between the inclined groove (502) and the center of the second ceramic tube (5) gradually shortens in a direction away from the arc groove (501); When the second ceramic tube (5) rotates, the engaging shaft (902) can be moved along the arc groove (501) and the inclined groove (502), so that the locking portion (901) is inserted into the first locking hole (402).

4. The explosion-proof electric heater with good thermal conductivity according to claim 1, characterized in that: The differential structure comprises an arc-shaped through hole (1701) provided on the connecting member (17) and a groove wheel (16) rotatably connected to the follower (12), wherein the groove wheel (16) is capable of rolling in the arc-shaped through hole (1701).

5. A method for assembling the explosion-proof electric heater with good thermal conductivity according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1: Place the first guide member (8) into the strip-shaped groove (401) and push the second ceramic tube (5) toward the inside of the first ceramic tube (4); Step 2: rotating the rotating sleeve (11) to activate the elastic traction component; Step 3: The elastic traction component drives the axial connection component to move, so that the axial locking between the first guide member (8) and the second ceramic tube (5) is released; Step 4: The elastic traction component continues to operate, causing the second ceramic tube (5) to rotate, and under the action of the locking structure, the locking portion (901) can be inserted into the first locking hole (402), thereby completing the installation of the second ceramic tube (5) and the spiral heating wire (1).

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