Electric heating tube mounting structure, electric heating tube type boiler and electric steam generator

Abstract

The invention discloses an electric heating tube mounting structure which comprises a tube plate, an electric heating tube body, a first cylinder part and a second cylinder part. A through hole is formed in the tube plate and comprises a first round hole part and a conical hole part, the conical hole part is connected with the first round hole part and a second round hole part, the wide-caliber end of the conical hole part is connected with the first round hole part, and the narrow-caliber end of the conical hole part is connected with the second round hole part. The first barrel body part is connected with the second barrel body part, the inner wall surface of the first barrel body and the inner wall surface of the second barrel body are located on the same cylindrical surface, the outer wall surface of the first barrel body part is cylindrical, the outer wall surface of the second barrel body part is in a circular truncated cone shape, and the outer wall surface of the second barrel body part is used for being tightly attached to a conical hole part. Threads are arranged on the outer wall of the first barrel body part, threads are arranged on the hole wall of the first round hole part, and an outer transition ring groove is formed between the outer wall face of the first barrel body part and the outer wall face of the second barrel body part.

Description

Technical Field

[0001] The invention relates to the field of electrical equipment, and in particular to an electric heating tube installation structure, an electric heating tube boiler and an electric steam generator. Background Art

[0002] The electric heating tube boiler is a commonly used boiler at present. The electric heating tube is a very important component of the electric heating tube boiler. The electric heating tube in the electric heating tube boiler is usually installed on a plate. Its installation structure is shown in the patent announcement document CN209944653U. In the installation structure shown in the document, the sealing gasket at the end of the electric heating tube on which it relies is stuck in the flange (the figure mark is 2 in the document). Since it is stuck on the flange, the installation stability of the electric heating tube shown in this structure on the flange is relatively poor. Summary of the invention

[0003] In view of the above problems, the present invention proposes an electric heating pipe installation structure.

[0004] The technical solution adopted by the present invention is as follows:

[0005] An electric heating pipe installation structure comprises a tube sheet, an electric heating pipe body, a first barrel portion and a second barrel portion; a through hole is opened on the tube sheet, the through hole comprises a first circular hole portion and a conical hole portion, the conical hole portion is connected to the first circular hole portion and the second circular hole portion, and the wide-diameter end of the conical hole portion is connected to the first circular hole portion, and the narrow-diameter end of the conical hole portion is connected to the second circular hole portion, the first barrel portion is connected to the second barrel portion, and the inner wall surface of the first barrel and the inner wall surface of the second barrel are located on the same cylindrical surface, The outer wall surface of the first barrel portion is cylindrical, the outer wall surface of the second barrel portion is truncated cone-shaped, the outer wall surface of the second barrel portion is used to close the conical hole portion, the outer wall of the first barrel portion is provided with a thread, the hole wall of the first circular hole portion is provided with a thread, an outer transition annular groove is provided between the outer wall surface of the first barrel portion and the outer wall surface of the second barrel portion, an inner transition annular groove is provided between the inner wall surface of the first barrel portion and the inner wall surface of the second barrel portion, and the inner transition annular groove and the outer transition annular groove are located in the same plane;

[0006] The electric heating tube body is clamped in the first barrel portion and the second barrel portion. When the first barrel portion is screwed into the first circular hole portion, the conical hole portion squeezes the second barrel portion, the second barrel portion breaks and falls off from the first barrel portion, and the second barrel portion is squeezed and deformed to clamp the electric heating tube body.

[0007] In this installation structure, a through hole is opened on the tube plate, and the through hole consists of a first circular hole portion and a conical hole portion, wherein the diameter of the widest end of the conical hole portion is smaller than the diameter of the first circular hole portion, so when installing the electric heating tube body, the electric heating tube body is first inserted into the first barrel portion and the second barrel portion, and the electric heating tube body is close to the inner wall surface of the first barrel portion and the inner wall surface of the second barrel portion, and then the first barrel portion and the second barrel portion are placed in the through hole, and the thread on the outer wall surface of the first barrel portion is matched with the thread on the hole wall of the first circular hole portion, and then the first barrel portion is continuously twisted so that the first barrel portion It keeps moving into the first circular hole portion, and finally moves until the outer wall surface of the second barrel portion is close to the hole wall of the circular hole platform portion. At this time, continue to twist the first barrel portion, and the first barrel portion and the second barrel portion will break due to stress. After the break, a part of the second barrel portion is located in the conical hole portion, and the other part of the second barrel portion is located in the first circular hole portion. At this time, the second barrel portion has been squeezed and deformed, and the second barrel portion itself is clamped in the through hole. The second barrel portion clamps the electric heating tube body, and the more the first barrel portion moves toward the conical hole portion, the tighter the second barrel portion clamps the electric heating tube body.

[0008] In summary, in this electric heating tube installation structure, a through hole consisting of a first circular hole portion and a conical hole portion is provided on the tube plate, and a fastener consisting of a first cylindrical portion and a second cylindrical portion is used to clamp and install the electric heating tube body on the tube plate, so that the electric heating tube body has good installation stability on the tube plate.

[0009] Optionally, it further includes a clamping portion, which is arranged at one end of the first cylindrical portion, and the two ends of the first cylindrical portion are the clamping portion and the second cylindrical portion respectively.

[0010] The clamping portion is provided to facilitate a part such as a wrench to screw the first barrel portion through the clamping portion.

[0011] Optionally, the inner transition ring groove is a circular ring-shaped inner transition ring groove.

[0012] Optionally, the outer transition ring groove is a triangular outer transition ring groove.

[0013] The inner transition ring groove is annular, the outer transition ring groove is triangular, and the inner transition ring groove and the outer transition ring groove are located in the same plane, so that as long as stress is generated, the second cylinder part can quickly break off from the first cylinder part.

[0014] Optionally, there is a gap between the electric heating tube body and the hole wall of the second circular hole portion.

[0015] When the electric heating tube body needs to be disassembled from the tube sheet, the first cylinder portion can be unscrewed from the first circular hole portion first, and then the first cylinder portion can be removed from the electric heating tube body. Then, an external instrument (including but not limited to a thin steel needle) pushes the second cylinder portion toward the side of the first circular hole portion through the gap, so that the conical hole portion no longer clamps the second cylinder portion, thereby quickly removing the electric heating tube body from the tube sheet.

[0016] An electric heating tube boiler comprises the electric heating tube installation structure as described above.

[0017] An electric steam generator comprises the electric heating pipe installation structure as described above.

[0018] The beneficial effect of the present invention is that by arranging a through hole consisting of a first circular hole portion and a conical hole portion on the tube plate, and using a fastener consisting of a first cylindrical portion and a second cylindrical portion to clamp and install the electric heating tube body on the tube plate, the electric heating tube body has good installation stability on the tube plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the structure of the through hole on the tube sheet;

[0021] Figure 2 It is a schematic diagram of the matching relationship between the first barrel portion and the second barrel portion;

[0022] Figure 3 This is a schematic diagram of the electric heating tube installation structure;

[0023] Figure 4 yes Figure 3 An enlarged schematic diagram of point A in the middle.

[0024] The reference numerals in the figure are: 1, tube sheet; 101, first circular hole portion; 102, conical hole portion; 103, second circular hole portion; 21, first cylindrical portion; 22, second cylindrical portion; 23, clamping portion; 24, inner transition ring groove; 25, outer transition ring groove; 3, electric heating tube body; 4, ceramic sleeve; 5, nut; 6, wiring piece. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0028] Example 1

[0029] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, an electric heating pipe installation structure includes a tube sheet 1, an electric heating pipe body 3, a first barrel portion 21 and a second barrel portion 22; a through hole is opened on the tube sheet 1, and the through hole includes a first circular hole portion 101 and a conical hole portion 102, and the two ends of the conical hole portion 102 are respectively connected to the first circular hole portion 101 and the second circular hole portion 103, and the wide diameter end of the conical hole portion 102 is connected to the first circular hole portion 101, and the narrow diameter end of the conical hole portion 102 is connected to the second circular hole portion 102, the first barrel portion 21 is connected to the second barrel portion 22, and the inner wall surface of the first barrel and the inner wall surface of the second barrel are located at the same On a cylindrical surface, the outer wall surface of the first barrel portion 21 is cylindrical, the outer wall surface of the second barrel portion 22 is truncated cone-shaped, the outer wall surface of the second barrel portion 22 is used to close the conical hole portion 102, the outer wall of the first barrel portion 21 is provided with an external thread, the hole wall of the first circular hole portion 101 is provided with an internal thread, an outer transition annular groove 25 is provided between the outer wall surface of the first barrel portion 21 and the outer wall surface of the second barrel portion 22, an inner transition annular groove 24 is provided between the inner wall surface of the first barrel portion 21 and the inner wall surface of the second barrel portion 22, and the inner transition annular groove 24 and the outer transition annular groove 25 are located in the same plane;

[0030] The electric heating tube body 3 is clamped in the first cylindrical portion 21 and the second cylindrical portion 22. When the first cylindrical portion 21 is screwed into the first circular hole portion 101, the conical hole portion 102 squeezes the second cylindrical portion 22, and the second cylindrical portion 22 breaks and falls off from the first cylindrical portion 21. The second cylindrical portion 22 is squeezed and deformed to clamp the electric heating tube body 3.

[0031] In this installation structure, a through hole is opened on the tube plate 1, and the through hole consists of a first circular hole portion 101, a conical hole portion 102 and a second circular hole portion 103, wherein the diameter of the widest end of the conical hole portion 102 is smaller than the diameter of the first circular hole portion 101, so when installing the electric heating tube body 3, the electric heating tube body 3 is first inserted into the first barrel portion 21 and the second barrel portion 22, and the electric heating tube body 3 is close to the inner wall surface of the first barrel portion 21 and the inner wall surface of the second barrel portion 22, and then the first barrel portion 21 and the second barrel portion 22 are placed in the through hole, and the thread on the outer wall surface of the first barrel portion 21 is matched with the thread on the hole wall of the first circular hole portion 101, and then the first barrel portion 21 is continuously twisted so that the first barrel portion 21 is The body 21 continuously moves into the first circular hole 101, and finally moves to the point where the outer wall of the second barrel 22 is close to the hole wall of the circular hole platform 102. At this time, the first barrel 21 is still twisted, and the first barrel 21 and the second barrel 22 will break due to stress. After the break, a part of the second barrel 22 is located in the conical hole 102, and the other part of the second barrel 22 is located in the first circular hole 101. At this time, the second barrel 22 has been squeezed and deformed, and the second barrel 22 itself is clamped in the through hole. The second barrel 22 clamps the electric heating tube 3, and the more the first barrel 21 moves toward the conical hole 102, the tighter the second barrel 22 clamps the electric heating tube 3. The central axis of the first barrel 21 and the central axis of the second barrel 22 are in a straight line. The outer diameter of the widest end of the second barrel 22 is smaller than the outer diameter of the first barrel 21.

[0032] In summary, in this electric heating tube installation structure, a through hole consisting of a first circular hole portion 101, a conical hole portion 102 and a third circular hole portion 103 is provided on the tube sheet 1, and a fastener consisting of a first cylindrical portion 21 and a second cylindrical portion 22 is used to clamp and install the electric heating tube body 3 on the tube sheet 1, so that the electric heating tube body 3 has good installation stability on the tube sheet 1.

[0033] In the present structure, since the first barrel portion 21 and the second barrel portion 22 are completely connected together before installation, the materials of the two barrel portions break after they are fully installed. When the second barrel portion 22 breaks and falls off from the first barrel portion 21, a breaking sound will be emitted. One of the important functions of setting the inner transition ring groove 24 and the outer transition ring groove 25 is that a crisp breaking sound can be generated when breaking. The operator can judge whether the second barrel portion 22 has been installed in place by the breaking sound, and avoid excessive squeezing of the second barrel portion 22, which may cause the second barrel portion 22 to pinch the electric heating tube body 3.

[0034] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, it also includes a clamping portion 23, which is arranged at one end of the first cylindrical portion 21, and the two ends of the first cylindrical portion 21 are the clamping portion 23 and the second cylindrical portion 22 respectively.

[0035] The clamping portion 23 is provided to facilitate a wrench or the like to screw the first barrel portion 21 through the clamping portion 23. The clamping portion 23 may be a hexagonal clamping portion 23.

[0036] In the specific structure, the clamping portion 23, the first cylindrical portion 21 and the second cylindrical portion 22 are integrally formed and are cast from brass material. After casting, threads, inner transition ring grooves 24 and outer transition ring grooves 25 are provided. The brass material has good rigidity and certain deformability, can clamp the electric heating tube body 3, and has good corrosion resistance.

[0037] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, the inner transition ring groove 24 is a circular ring-shaped inner transition ring groove 24 .

[0038] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, the outer transition annular groove 25 is a triangular outer transition annular groove 25 .

[0039] The inner transition groove 24 is annular, the outer transition groove 25 is triangular, and the inner transition groove 24 and the outer transition groove 25 are located in the same plane, so that the second barrel portion 22 can quickly break off from the first barrel portion 21 as long as stress is generated.

[0040] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, there is a gap between the electric heating pipe body 3 and the hole wall of the second circular hole portion 103 .

[0041] When the electric heating tube body 3 needs to be disassembled from the tube sheet 1, the first cylindrical portion 21 can be first unscrewed from the first circular hole portion 101, and then the first cylindrical portion 21 can be removed from the electric heating tube body 3, and then an external instrument (including but not limited to a thin steel needle) pushes the second cylindrical portion 22 toward the side of the first circular hole portion 101 through the gap (the gap is located in the second circular hole portion 103), so that the conical hole portion 102 no longer clamps the second cylindrical portion 22, thereby quickly removing the electric heating tube body 3 from the tube sheet 1.

[0042] A ceramic sleeve 4 is sleeved on the electric heating tube body 3 , and a wiring piece 6 is installed on the electric heating tube body 3 through a nut 5 .

[0043] Example 2

[0044] An electric heating tube boiler, each electric heating tube in this electric heating tube boiler adopts the electric heating tube installation structure as shown in Example 1, and there are multiple electric heating tubes, which can be connected in parallel or in series. The electric heating tubes can heat water into steam (i.e., a steam boiler) or heat water from low temperature to high temperature (i.e., a hot water boiler). The working voltage of this electric heating tube boiler is 10kv.

[0045] Example 3

[0046] An electric steam generator adopts electric heating tubes to heat water. There are multiple electric heating tubes, each of which adopts the installation structure shown in Example 1. The working voltage of the electric steam generator is 10Kv, and the generated electric steam can be applied to various occasions (including but not limited to the exploitation of crude oil in oil fields).

[0047] The above-described embodiments only express some embodiments of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, it is still possible to modify the technical solutions recorded in the above-mentioned embodiments, or to replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric heating pipe installation structure, characterized in that: The invention comprises a tube sheet, an electric heating tube body, a first barrel portion and a second barrel portion; a through hole is opened on the tube sheet, and the through hole comprises a first circular hole portion, a conical hole portion and a second circular hole portion, the conical hole portion is connected with the first circular hole portion and the second circular hole portion, and the wide-diameter end of the conical hole portion is connected with the first circular hole portion, and the narrow-diameter end of the conical hole portion is connected with the second circular hole portion, the first barrel portion is connected with the second barrel portion, and the inner wall surface of the first barrel and the inner wall surface of the second barrel are located on the same cylindrical surface, and the The outer wall surface of the first barrel portion is cylindrical, the outer wall surface of the second barrel portion is truncated cone-shaped, the outer wall surface of the second barrel portion is used to close the conical hole portion, the outer wall of the first barrel portion is provided with a thread, the hole wall of the first circular hole portion is provided with a thread, an outer transition annular groove is provided between the outer wall surface of the first barrel portion and the outer wall surface of the second barrel portion, an inner transition annular groove is provided between the inner wall surface of the first barrel portion and the inner wall surface of the second barrel portion, and the inner transition annular groove and the outer transition annular groove are located in the same plane; The electric heating tube body is clamped in the first barrel portion and the second barrel portion. When the first barrel portion is screwed into the first circular hole portion, the conical hole portion squeezes the second barrel portion, the second barrel portion breaks and falls off from the first barrel portion, and the second barrel portion is squeezed and deformed to clamp the electric heating tube body.

2. The electric heating pipe installation structure according to claim 1, characterized in that: It also includes a clamping portion, which is arranged at one end of the first cylindrical portion, and the two ends of the first cylindrical portion are the clamping portion and the second cylindrical portion respectively.

3. The electric heating pipe installation structure according to claim 1, characterized in that: The inner transition ring groove is a circular ring-shaped inner transition ring groove.

4. The electric heating pipe installation structure according to claim 3, characterized in that: The outer transition ring groove is a triangular outer transition ring groove.

5. The electric heating pipe installation structure according to claim 1, characterized in that: There is a gap between the electric heating pipe body and the hole wall of the second circular hole portion.

6. The electric heating pipe installation structure according to claim 1, characterized in that: A ceramic sleeve is sleeved on the electric heating tube body, and a wiring piece is installed on the electric heating tube body through a nut.

7. An electric heating tube boiler, characterized in that: It comprises the electric heating pipe installation structure as described in any one of claims 1 to 6.

8. An electric steam generator, characterized in that: It comprises the electric heating pipe installation structure as described in any one of claims 1 to 6.

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