Pipe orifice sealing structure of industrial electric heating pipe

Abstract

A pipe opening sealing structure of an industrial electric heating pipe comprises an electric heating pipe body, the electric heating pipe body comprises a heating body and a metal pipe sleeve, the metal pipe sleeve is provided with a pipe cavity and a pipe opening communicated with the pipe cavity, the heating body is arranged in the pipe cavity through the pipe opening, and the electric heating pipe body further comprises a sealing part and a bonding layer. The heating body is arranged on the metal pipe sleeve, the sealing part is arranged on the metal pipe sleeve and located at the pipe opening to seal the pipe cavity, the bonding layer is arranged in a gap between the sealing part and the heating body, and / or the bonding layer is arranged in a gap between the sealing part and the metal pipe sleeve, and the sealing part is installed on the pipe opening through the bonding layer. The utility model provides a pipe orifice sealing structure of an industrial electric heating pipe, which can reduce the use amount of sealant and reduce the material cost of the electric heating pipe.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of industrial electric heating pipe, specifically relates to a pipe mouth sealing structure of industrial electric heating pipe. BACKGROUND

[0002] Industrial electric heating pipe is the electric heating element in tubular shape, is through the electric appliance of electric energy conversion into heat energy, it is filled into the metal pipe in the metal pipe and the heating element between the gap of electric heating rod etc. Filling magnesium oxide powder with good heat conductivity and insulation and filling sealant on the pipe mouth of the metal pipe.

[0003] Patent literature No. CN207720448U discloses a kind of pipe mouth sealing structure of electric heating pipe, it includes metal pipe body, the pipe body is equipped with resistance wire coil, coil is spiral spring shape, make it can axial elastic expansion and contraction, the coil is packed with magnesium oxide insulation layer, and magnesium oxide insulation layer is filled in the inside of pipe body, the both ends of the coil are connected with corresponding lead pin, TDE 85 sealant is added at the both ends of the pipe body, the middle part of lead pin is fixed on TDE 85 sealant, above the pipe mouth sealing structure of electric heating pipe, sealant is filled in metal pipe body and is filled to the pipe mouth of metal pipe body to realize sealing metal pipe body, therefore, the component of sealant required when sealing pipe mouth is more, and the unit price of sealant meeting the use in this field is very expensive, lead to the material cost of electric heating pipe, increase the manufacturing cost of product, and external power supply connecting line and lead pin are generally electrically connected by welding mode, the connecting place of the two is generally arranged in sealant, when electric heating pipe is used for a period of time, sealant cold shrinkage thermal expansion and hardening crack, make the connecting place of external power supply connecting line and lead pin easy to force break, lead to the durability of electric heating pipe, and the use experience of user is poor.

[0004] Therefore, it needs to be further improved. UTILITY MODEL CONTENTS

[0005] The utility model aims at at least one of the deficiencies of prior art, and provides a pipe mouth sealing structure of industrial electric heating pipe, which can reduce the use component of sealant and reduce the material cost of electric heating pipe.

[0006] To achieve the above object, the technical scheme provided by the utility model embodiment is:

[0007] A pipe mouth sealing structure of an industrial electric heating pipe, comprising an electric heating pipe body, the electric heating pipe body comprising a heating body and a metal pipe sleeve, the metal pipe sleeve being provided with a pipe cavity and a pipe mouth communicating with the pipe cavity, the heating body being arranged in the pipe cavity through the pipe mouth, the electric heating pipe body further comprising a sealing component and a bonding layer, the sealing component being arranged on the metal pipe sleeve and located at the pipe mouth to seal the pipe cavity, the bonding layer being arranged in a gap between the sealing component and the heating body and / or the bonding layer being arranged in a gap between the sealing component and the metal pipe sleeve, the sealing component being mounted on the pipe mouth through the bonding layer.

[0008] The sealing component comprises a first column part and a second column part arranged in an up-down manner, a radial dimension of the first column part being greater than a radial dimension of the second column part, when the sealing component is mounted on the metal pipe sleeve, the second column part extends into the pipe cavity through the pipe mouth, the first column part is arranged at an outer edge of the pipe mouth, and the bonding layer is located between a side wall of the second column part and a side wall of the pipe cavity and / or between a bottom end of the first column part and the outer edge of the pipe mouth.

[0009] A vertical projection shape of the side wall of the metal pipe sleeve is circular, a vertical projection shape of the first column part is circular, and a diameter dimension of the first column part is the same as a diameter dimension of the side wall of the metal pipe sleeve.

[0010] An axial dimension of the second column part is A, 0

[0011] An axial dimension of the second column part is B, B>10mm, a radial dimension of the second column part is smaller than a radial dimension of the pipe cavity, and the bonding layer is located in a gap between a side wall of the second column part and a side wall of the pipe cavity.

[0012] The sealing component further comprises a sealing rib, the sealing rib being helically arranged on a side wall of the second column part, a radial dimension of the sealing rib being the same as a radial dimension of the inner cavity of the metal pipe sleeve, and the bonding layer being located in a gap of the sealing rib.

[0013] The industrial electric heating pipe further comprises a wire component for electrically connecting the electric heating pipe body and an external power supply, the heating body being provided with a power supply connecting part, the sealing component being further provided with a wire through hole for the wire component to pass through, the wire component extending into the pipe cavity through the wire through hole and being electrically connected with the power supply connecting part.

[0014] The electric heating pipe body further comprises a protection component for protecting a connection between the wire component and the power supply connecting part, the protection component being arranged in the wire through hole and located on the connection between the wire component and the power supply connecting part.

[0015] The closing part is made of ceramic material, rubber material, silica gel material or PVC material, and the heating body is an electric heating wire, an electric heating rod or an electric heating film.

[0016] The utility model discloses the beneficial effect is as follows:

[0017] The utility model discloses the pipe orifice closing structure of industrial electric heating pipe of adopting above -mentioned technical scheme, when industrial electric heating pipe assembly, only need to place closing part on the pipe orifice of metal pipe cover and through the fixed layer fixed on the pipe orifice of metal pipe cover, can realize the lumen of closing metal pipe cover, and the fixed layer volume is small, and the component of sealant required when industrial electric heating pipe assembly is small, reduces the use component of sealant, thereby reduce the material cost of industrial electric heating pipe, and product manufacturing cost can be reduced to a certain extent.

[0018] In addition, the pipe orifice closing structure of industrial electric heating pipe of adopting above -mentioned technical scheme, the outside of the connecting place between the power supply connecting portion of the heating body and the wire part is wrapped with the protection part and is arranged in the wire through -hole of the closing part, the connecting place between the power supply connecting portion of the heating body and the wire part is avoided and is disconnected because of stress, improves the durability of electric heating pipe, and improves the use experience of user. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is structural schematic diagram of industrial electric heating pipe of an embodiment of the utility model.

[0020] Figure 2 It is structural schematic diagram of electric heating pipe main part of an embodiment of the utility model.

[0021] Figure 3 It is exploded view of electric heating pipe main part of an embodiment of the utility model.

[0022] Figure 4 It is sectional view of electric heating pipe main part of an embodiment of the utility model.

[0023] Figure 5 It is Figure 4 A part enlarged view of.

[0024] Figure 6 It is sectional view of closing part of an embodiment of the utility model.

[0025] Figure 7 It is exploded view of electric heating pipe main part of an embodiment of the utility model.

[0026] Figure 8 It is sectional view of electric heating pipe main part of an embodiment of the utility model.

[0027] Figure 9 It is Figure 8 B part enlarged view of.

[0028] Figure 10 is a sectional view of the closing part of an embodiment of the present application.

[0029] Figure 11 is an exploded view of the electric heating tube body of an embodiment of the present application.

[0030] Figure 12 is a sectional view of the electric heating tube body of an embodiment of the present application.

[0031] Figure 13 is a C part of the enlarged view. Figure 12

[0032] Figure 14 is a sectional view of the closing part of an embodiment of the present application. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application.

[0034] Referring to Figures 1-14 , the pipe opening closing structure of the industrial electric heating tube comprises an electric heating tube body, the electric heating tube body comprises a heating body 1, a metal pipe sleeve 2 and a sticking layer 4, the metal pipe sleeve 2 is in a cylindrical shape, is provided with a pipe cavity 201 and a pipe opening 202 communicating with the pipe cavity 201, the heating body 1 is installed in the pipe cavity 201 through the pipe opening 202, the sticking layer 4 is sealing glue, the electric heating tube body further comprises a closing part 3, the closing part 3 is installed on the metal pipe sleeve 2 through an adhesive layer and is located at the pipe opening 202, specifically, in the embodiment, the closing part 3 comprises a first column part 301 and a second column part 302 arranged in an up-down manner, the vertical projection shape of the second column part 302 is circular and the diameter size thereof is smaller than the radial size of the first column part 301, when the closing part 3 is installed on the metal pipe sleeve 2, the second column part 302 extends into the pipe cavity 201 through the pipe opening 202, the first column part 301 is arranged at the outer edge of the pipe opening 202, the sticking layer 4 is filled in the gap between the closing part 3 and the heating body 1, so that an insulation layer is formed between the closing part 3 and the heating body 1, and the sticking layer 4 is also filled in the gap between the closing part 3 and the metal pipe sleeve 2, when the industrial electric heating tube is assembled, the closing part 3 only needs to be placed on the pipe opening 202 and fixed on the pipe opening 202 through the sticking layer 4, so that the pipe cavity 201 can be closed, and because the volume of the sticking layer 4 is small, the amount of sealing glue required when the industrial electric heating tube is assembled is small, the use amount of the sealing glue can be reduced, so that the material cost of the industrial electric heating tube is reduced, and the manufacturing cost of the product can be reduced to a certain extent.

[0035] ​Further, in the embodiment, the vertical projection shape of the side wall of the metal sleeve 2 is circular, the vertical projection shape of the first column part 301 is circular, and the diameter of the first column part 301 is the same as that of the side wall of the metal sleeve 2. Through the above technical solution, the outer side wall of the closing part 3 is vertically aligned with the outer side wall of the metal sleeve 2, and the appearance of the electric heating tube is more beautiful, which can be understood by those skilled in the art.

[0036] Further, the second column part 302 can have the following structure:

[0037] Referring to Figures 3-6 In the embodiment, the axial dimension of the second column part 302 is A, and A is preferably 5 mm. The radial dimension of the second column part 302 is the same as the radial dimension of the inner cavity of the metal sleeve 2. When the closing part 3 is installed on the pipe opening 202, the second column part 302 is positioned and matched with the pipe cavity 201 to realize the positioning of the closing part 3 on the metal sleeve 2. The adhesive layer 4 is located between the bottom end of the first column part 301 and the outer edge of the pipe opening 202 to realize the fixation of the closing part 3 on the pipe opening 202 and the closing of the pipe cavity 201, which can be understood by those skilled in the art.

[0038] Referring to Figures 7-10 In the embodiment, the axial dimension of the second column part 302 is B, and B is preferably 15 mm. The radial dimension of the second column part 302 is smaller than the radial dimension of the pipe cavity 201. When the closing part 3 is installed on the pipe opening 202, the adhesive layer 4 is located in the gap between the side wall of the second column part 302 and the side wall of the pipe cavity 201 to realize the fixation of the closing part 3 on the pipe opening 202 and the closing of the pipe cavity 201, which can be understood by those skilled in the art.

[0039] Referring to Figures 11-14 In the embodiment, the axial dimension of the second column part 302 is B, and B is preferably 15 mm. The radial dimension of the second column part 302 is smaller than the radial dimension of the pipe cavity 201. The closing part 3 further comprises a closing protruding rib 303. Specifically, the closing protruding rib 303 is spiral-shaped and is arranged on the side wall of the second column part 302. The radial dimension of the closing protruding rib 303 is the same as the radial dimension of the pipe cavity 201. When the closing part 3 is installed on the pipe opening 202, the closing protruding rib 303 cooperates with the pipe cavity 201 to make the closing part 3 screwed in the pipe cavity 201 through the closing protruding rib 303, thereby improving the adhesion between the closing part 3 and the metal sleeve 2. The adhesive layer 4 is located in the gap of the closing protruding rib 303 to realize the fixation of the closing part 3 on the pipe opening 202 and the closing of the pipe cavity 201, which can be understood by those skilled in the art.

[0040] Further, the industrial electric heating tube further comprises a wire component 5, in the embodiment, the wire component 5 is preferably an electric wire and is used to electrically connect the heating body 1 and an external power supply, the heating body 1 is provided with a power supply connecting part 101, in the embodiment, the power supply connecting part 101 comprises a positive connecting part and a negative connecting part and is arranged on the same end of the heating body 1 to realize the connection between the heating body 1 and the wire component 5, the closed component 3 is further provided with wire through holes 304, in the embodiment, the number of the wire through holes 304 is preferably two groups and extends along the height direction of the closed component 3, so that the wire component 5 can pass through the closed component 3 through the wire through holes 304, the wire component 5 extends into the cavity 201 through the wire through holes 304 and is electrically connected with the power supply connecting part 101 to realize the electrical connection between the industrial electric heating tube and the external power supply, which can be understood by those skilled in the art.

[0041] Further, the electric heating tube body further comprises a protection component 6, specifically, in the embodiment, the protection component 6 is preferably a heat shrink tube, the diameter of the outer wall of the protection component 6 is the same as that of the wire through hole 304, the protection component 6 is fixedly arranged in the wire through hole 304 by sealing glue, and the diameter of the inner wall of the protection component 6 is slightly larger than that of the wire component 5 and the power supply connecting part 101, so as to facilitate the wire component 5 and the power supply connecting part 101 to pass into the inner cavity of the protection component 6, when the wire component 5 and the power supply connecting part 101 are electrically connected, the connection part therebetween is located in the inner cavity of the protection component 6, and the protection component 6 is arranged in the wire through hole 304 and located on the connection part between the wire component 5 and the power supply connecting part 101 to realize the protection of the connection part between the wire component 5 and the power supply connecting part 101, which can be understood by those skilled in the art.

[0042] By adopting the pipe opening closing structure of the industrial electric heating tube, the connection part between the wire component 5 and the power supply connecting part 101 of the heating body 1 is wrapped with the protection component 6 on the outside and arranged in the wire through hole 304 of the closed component 3, which avoids the disconnection of the connection part between the wire component 5 and the power supply connecting part 101 of the heating body 1 due to stress, improves the durability of the electric heating tube and improves the user experience.

[0043] Further, in the embodiment, the closed component 3 is preferably made of ceramic material, which has good insulation and heat conduction properties, can avoid electric leakage of the industrial electric heating tube due to poor insulation, and can dissipate heat in the cavity 201 through the closed component 3 from the cavity 201, reduce the hot gas pressure in the cavity 201 to avoid the closed component 3 from accidentally exploding from the pipe opening 202, and improve the safety of the industrial electric heating tube, in the embodiment, the heating body 1 is preferably an electric heating rod, and the gap between the heating body 1 and the metal pipe sleeve 2 is filled with magnesium oxide powder to realize the insulation and heat conduction effects in the cavity 201, which can be understood by those skilled in the art.

[0044] The above is the preferred scheme of the utility model, and the basic principle, main features and advantages of the utility model are displayed and described. Those skilled in the art should understand that the utility model is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only for the purpose of illustrating the principle of the utility model. The utility model can have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed, and the scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A pipe mouth sealing structure of an industrial electric heating pipe, comprising an electric heating pipe body, the electric heating pipe body comprising a heating body (1) and a metal pipe sleeve (2), the metal pipe sleeve (2) being provided with a pipe cavity (201) and a pipe mouth (202) communicating with the pipe cavity (201), and the heating body (1) being arranged in the pipe cavity (201) through the pipe mouth (202), characterized in that, The electric heating tube body further comprises a closing component (3) and a sticking layer (4), the closing component (3) is arranged on the metal tube sleeve (2) and located at the pipe opening (202) to close the tube cavity (201), the sticking layer (4) is arranged in the gap between the closing component (3) and the heating body (1), and / or the sticking layer (4) is arranged in the gap between the closing component (3) and the metal tube sleeve (2), and the closing component (3) is installed on the pipe opening (202) through the sticking layer (4); The closing component (3) comprises a first column part (301) and a second column part (302) arranged in an up-down manner, the radial dimension of the first column part (301) is greater than the radial dimension of the second column part (302), when the closing component (3) is installed on the metal tube sleeve (2), the second column part (302) extends into the tube cavity (201) through the pipe opening (202), the first column part (301) is arranged at the outer edge of the pipe opening (202), and the sticking layer (4) is located between the side wall of the second column part (302) and the side wall of the tube cavity (201) and / or between the bottom end of the first column part (301) and the outer edge of the pipe opening (202).

2. The pipe mouth sealing structure of the industrial electric heating pipe according to claim 1, characterized in that, The vertical projection shape of the side wall of the metal tube sleeve (2) is circular, the vertical projection shape of the first column part (301) is circular, and the diameter dimension of the first column part (301) is the same as the diameter dimension of the side wall of the metal tube sleeve (2).

3. The pipe mouth sealing structure of the industrial electric heating pipe according to claim 2, characterized in that, The axial dimension of the second column part (302) is A, 0 4. The pipe mouth sealing structure of the industrial electric heating pipe according to claim 2, characterized in that, The axial dimension of the second column part (302) is B, B>10mm, the radial dimension of the second column part (302) is smaller than the radial dimension of the tube cavity (201), and the sticking layer (4) is located in the gap between the side wall of the second column part (302) and the side wall of the tube cavity (201).

5. The pipe mouth sealing structure of the industrial electric heating pipe according to claim 4, characterized in that, The closing component (3) further comprises a closing protruding rib (303), the closing protruding rib (303) is helical and arranged on the side wall of the second column part (302), the radial dimension of the closing protruding rib (303) is equivalent to the radial dimension of the tube cavity (201), and the sticking layer (4) is located in the gap of the closing protruding rib (303).

6. The industrial electric heater tube end closure structure of claim 1, wherein, The industrial electric heating tube further comprises a wire component (5) for electrically connecting the electric heating tube body and an external power supply, the heating body (1) is provided with a power supply connecting part (101), the closing component (3) is further provided with a wire through hole (304) for the wire component (5) to pass through, the wire component (5) extends into the tube cavity (201) through the wire through hole (304) and is electrically connected with the power supply connecting part (101).

7. The industrial electric heater tube end closure structure of claim 6 wherein, The electric heating tube body further comprises a protection component (6) for protecting the connection between the wire component (5) and the power supply connecting part (101), the protection component (6) is arranged in the wire through hole (304) and located on the connection between the wire component (5) and the power supply connecting part (101).

8. The pipe closure structure of the industrial electric heating pipe according to any one of claims 1-7, characterized in that, The closing part (3) is made of ceramic material, rubber material, silica gel material or PVC material, and the heating body (1) is electric heating wire, electric heating rod or electric heating film.

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