Steam 10KV electric heating tube type generator for oil field exploitation

Abstract

The invention discloses a steam 10KV electric heating tube type generator for oil field exploitation. 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] This invention relates to the field of electrical equipment, and more particularly to an electric heating tube mounting structure, an electric heating tube boiler, and an electric steam generator. Background Technology

[0002] Electric heating tube boilers are a commonly used type of boiler. The electric heating tube is a very important component of electric heating tube boilers. The electric heating tube in an electric heating tube boiler is usually mounted on a plate. Its mounting structure is shown in patent publication document CN209944653U. In the mounting structure shown in this document, the sealing gasket at the end of the electric heating tube is stuck on the flange (marked as 2 in the attached figure). Because it is stuck on the flange, the installation stability of the electric heating tube on the flange in this structure is relatively poor. Summary of the Invention

[0003] To address the above-mentioned problems, this invention proposes an electric heating tube mounting structure.

[0004] The technical solution adopted in this invention is as follows:

[0005] An electric heating element mounting structure includes a tube sheet, an electric heating element body, a first cylindrical portion, and a second cylindrical portion. The tube sheet has a through hole, which includes a first circular hole and a conical hole. The conical hole is connected to both the first and second circular hole portions, with the wider end of the conical hole connected to the first circular hole and the narrower end connected to the second circular hole. The first and second cylindrical portions are connected, and the inner wall surfaces of the first and second cylindrical portions are located on the same cylindrical surface. The outer wall of the first cylindrical part is cylindrical, and the outer wall of the second cylindrical part is frustum-shaped. The outer wall of the second cylindrical part is used to fit tightly against the conical hole. The outer wall of the first cylindrical part is provided with threads, and the hole wall of the first circular hole is provided with threads. An outer transition annular groove is provided between the outer wall of the first cylindrical part and the outer wall of the second cylindrical part, and an inner transition annular groove is provided between the inner wall of the first cylindrical part and the inner wall of the second cylindrical part. The inner transition annular groove and the outer transition annular groove are located in the same plane.

[0006] The heating element is clamped inside the first cylindrical part and the second cylindrical part. When the first cylindrical part is screwed into the first circular hole, the conical hole compresses the second cylindrical part, causing the second cylindrical part to break off from the first cylindrical part. The second cylindrical part undergoes compression deformation to clamp the heating element.

[0007] In this installation structure, a through hole is formed in the tube sheet. The through hole consists of a first circular hole and a conical hole. The diameter of the widest end of the conical hole is smaller than the diameter of the first circular hole. Therefore, when installing the heating element, the heating element is first inserted into the first and second cylindrical sections, with the heating element pressed against the inner walls of the first and second cylindrical sections. Then, the first and second cylindrical sections are placed into the through hole, with the threads on the outer wall of the first cylindrical section engaging with the threads on the wall of the first circular hole. The first cylindrical section is then continuously rotated until it... It continuously moves into the first circular hole until the outer wall of the second cylindrical part is pressed against the hole wall of the circular hole platform. At this point, if the first cylindrical part is continued to be twisted, the first cylindrical part and the second cylindrical part will break due to stress. After the breakage, part of the second cylindrical part is located in the conical hole, and the other part of the second cylindrical part is located in the first circular hole. At this time, the second cylindrical part has been compressed and deformed, and the second cylindrical part itself is clamped in the through hole. The second cylindrical part clamps the heating tube, and the more the first cylindrical part moves towards the conical hole, the tighter the second cylindrical part clamps the heating tube.

[0008] In summary, in this type of electric heating tube installation structure, by providing a through hole composed of a first circular hole and a conical hole on the tube sheet, and using fasteners composed of a first cylindrical part and a second cylindrical part to clamp and install the electric heating tube on the tube sheet, the electric heating tube has good installation stability on the tube sheet.

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

[0010] The purpose of the clamping part is to facilitate the use of wrenches and other parts to tighten the first cylinder part.

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

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

[0013] The inner transition ring groove is circular, and the outer transition ring groove is triangular. The inner and outer transition ring grooves are located in the same plane. In this way, 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 heating tube body and the wall of the second circular hole.

[0015] When it is necessary to remove the heating element from the tube sheet, firstly, the first cylindrical part can be unscrewed from the first round hole, and then the first cylindrical part can be removed from the heating element. Then, external instruments (including but not limited to thin steel needles) can be used to push the second cylindrical part against one side of the first round hole through the gap, so that the conical hole no longer clamps the second cylindrical part, thereby quickly removing the heating element from the tube sheet.

[0016] An electric heating tube boiler includes the electric heating tube mounting structure described above.

[0017] An electric steam generator includes the electric heating tube mounting structure described above.

[0018] The beneficial effects of the present invention are: by providing a through hole composed of a first circular hole and a conical hole on the tube sheet, and using fasteners composed of a first cylindrical part and a second cylindrical part to clamp and install the electric heating tube on the tube sheet, the electric heating tube has good installation stability on the tube sheet. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

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

[0021] Figure 2 This is a schematic diagram showing the fitting relationship between the first cylindrical section and the second cylindrical section;

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

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

[0024] The reference numerals in the figures are as follows: 1. Tube sheet; 101. First circular hole section; 102. Conical hole section; 103. Second circular hole section; 21. First cylindrical section; 22. Second cylindrical section; 23. Clamping section; 24. Inner transition ring groove; 25. Outer transition ring groove; 3. Heating tube body; 4. Ceramic sleeve; 5. Nut; 6. Connecting piece. Detailed Implementation

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0027] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0028] Example 1

[0029] As attached Figure 1 Appendix Figure 2 and appendix Figure 3 As shown, an electric heating tube mounting structure includes a tube plate 1, an electric heating tube body 3, a first cylindrical body portion 21, and a second cylindrical body portion 22. The tube plate 1 has a through hole, which includes a first circular hole portion 101 and a conical hole portion 102. 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. 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 cylindrical body portion 21 is connected to the second cylindrical body portion 22, and the inner wall surfaces of the first and second cylindrical bodies are located at the same level. On a cylindrical surface, the outer wall of the first cylindrical part 21 is cylindrical, and the outer wall of the second cylindrical part 22 is frustum-shaped. The outer wall of the second cylindrical part 22 is used to fit tightly against the conical hole 102. The outer wall of the first cylindrical part 21 is provided with an external thread, and the hole wall of the first circular hole 101 is provided with an internal thread. An outer transition ring groove 25 is provided between the outer wall of the first cylindrical part 21 and the outer wall of the second cylindrical part 22. An inner transition ring groove 24 is provided between the inner wall of the first cylindrical part 21 and the inner wall of the second cylindrical part 22. The inner transition ring groove 24 and the outer transition ring groove 25 are located in the same plane.

[0030] The heating tube 3 is clamped inside the first cylindrical part 21 and the second cylindrical part 22. When the first cylindrical part 21 is screwed into the first circular hole 101, the conical hole 102 compresses the second cylindrical part 22, causing the second cylindrical part 22 to break off from the first cylindrical part 21. The second cylindrical part 22 undergoes compression deformation to clamp the heating tube 3.

[0031] In this installation structure, a through hole is formed on the tube sheet 1. The through hole consists of a first circular hole 101, a conical hole 102, and a second circular hole 103. The diameter of the widest end of the conical hole 102 is smaller than the diameter of the first circular hole 101. Therefore, when installing the heating element 3, the heating element 3 is first inserted into the first cylindrical part 21 and the second cylindrical part 22, with the heating element 3 pressed against the inner wall surfaces of the first cylindrical part 21 and the second cylindrical part 22. Then, the first cylindrical part 21 and the second cylindrical part 22 are placed into the through hole, and the threads on the outer wall surface of the first cylindrical part 21 engage with the threads on the hole wall of the first circular hole 101. Then, the first cylindrical part 21 is continuously rotated, causing the first cylindrical part 21 to rotate. The body portion 21 continuously moves into the first circular hole portion 101, eventually reaching a point where the outer wall of the second cylindrical body portion 22 is pressed against the hole wall of the circular hole platform portion 102. At this point, if the first cylindrical body portion 21 is continued to be twisted, stress will cause a break between the first cylindrical body portion 21 and the second cylindrical body portion 22. After the breakage, a portion of the second cylindrical body portion 22 will be located inside the conical hole portion 102, while the other portion will be located inside the first circular hole portion 101. At this point, the second cylindrical body portion 22 has undergone compression deformation and is clamped within the through hole. The second cylindrical body portion 22 clamps the heating element 3, and the closer the first cylindrical body portion 21 moves towards the conical hole portion 102, the tighter the second cylindrical body portion 22 clamps the heating element 3. The central axis of the first cylindrical body portion 21 and the central axis of the second cylindrical body portion 22 are aligned. The outer diameter of the widest end of the second cylindrical body portion 22 is smaller than the outer diameter of the first cylindrical body portion 21.

[0032] In summary, in this type of electric heating tube installation structure, by providing a through hole on the tube sheet 1 consisting of a first circular hole 101, a conical hole 102, and a third circular hole 103, and by using fasteners consisting of a first cylindrical part 21 and a second cylindrical part 22 to clamp and install the electric heating tube 3 on the tube sheet 1, the electric heating tube 3 has good installation stability on the tube sheet 1.

[0033] In this structure, since the first cylindrical part 21 and the second cylindrical part 22 are completely connected before installation, if they break after being fully installed, the second cylindrical part 22 will make a breaking sound when it breaks off from the first cylindrical part 21. One of the important functions of setting the inner transition ring groove 24 and the outer transition ring groove 25 is to produce a crisp breaking sound when it breaks. The operator can judge whether the second cylindrical part 22 has been installed in place by the breaking sound, so as to avoid excessive pressure on the second cylindrical part 22, which would cause the second cylindrical part 22 to pinch and damage the heating tube 3.

[0034] As attached Figure 1 Appendix Figure 2 and appendix Figure 3 As shown, it also includes a clamping part 23, which is disposed at one end of the first cylindrical part 21. The two ends of the first cylindrical part 21 are the clamping part 23 and the second cylindrical part 22, respectively.

[0035] The purpose of the clamping part 23 is to facilitate the use of parts such as wrenches to tighten the first cylindrical part 21. Specifically, the clamping part 23 can be hexagonal.

[0036] In the specific structure, the clamping part 23, the first cylindrical part 21 and the second cylindrical part 22 are integrally formed and are cast from brass material. After casting, threads, inner transition ring groove 24 and outer transition ring groove 25 are opened. Brass material has good rigidity and a certain degree of deformability, which can clamp the heating tube 3, and at the same time has good corrosion resistance.

[0037] As attached Figure 1 Appendix Figure 2 and appendix Figure 3 As shown, the inner transition groove 24 is a circular inner transition groove 24.

[0038] As attached Figure 1 Appendix Figure 2 and appendix Figure 3 As shown, the outer transition ring groove 25 is a triangular outer transition ring groove 25.

[0039] The inner transition ring groove 24 is circular, and the outer transition ring groove 25 is triangular. The inner transition ring groove 24 and the outer transition ring groove 25 are located in the same plane. In this way, as long as stress is generated, the second cylinder part 22 can quickly break off from the first cylinder part 21.

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

[0041] When it is necessary to remove the heating element 3 from the tube sheet 1, the first cylindrical part 21 can be unscrewed from the first round hole 101, and then the first cylindrical part 21 can be removed from the heating element 3. Then, an external instrument (including but not limited to a thin steel needle) can be used to push the second cylindrical part 22 against one side of the first round hole 101 through the gap (the gap is located inside the second round hole 103), so that the conical hole 102 no longer clamps the second cylindrical part 22, thereby quickly removing the heating element 3 from the tube sheet 1.

[0042] A ceramic sleeve 4 is fitted onto the heating tube body 3, and a connecting piece 6 is installed on the heating tube body 3 via a nut 5.

[0043] Example 2

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

[0045] Example 3

[0046] An electric steam generator is disclosed. This electric steam generator uses electric heating tubes to heat water. There are multiple electric heating tubes, and each electric heating tube adopts the installation structure shown in Example 1. The working voltage of the electric steam generator is 10 kV. The generated electric steam can be applied to a variety of occasions (including but not limited to crude oil extraction in oil fields).

[0047] The above-described embodiments only illustrate some aspects of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A 10KV electric heating tube generator for oilfield development, characterized in that, The operating voltage is 10KV, and it includes multiple heating elements. The heating element is installed using the following structure: a tube sheet, a heating element body, a first cylindrical section, and a second cylindrical section. The tube sheet has a through hole, which includes a first circular hole, a conical hole, and a second circular hole. The conical hole connects to both the first and second circular hole sections, with the wider end of the conical hole connecting to the first circular hole and the narrower end connecting to the second circular hole. The first cylindrical section connects to the second cylindrical section, and the inner wall surfaces of the first and second cylindrical sections are located on the same circle. On the cylindrical surface, the outer wall of the first cylindrical part is cylindrical, and the outer wall of the second cylindrical part is frustum-shaped. The outer wall of the second cylindrical part is used to fit tightly against the conical hole. The outer wall of the first cylindrical part is provided with threads, and the hole wall of the first circular hole is provided with threads. An outer transition annular groove is provided between the outer wall of the first cylindrical part and the outer wall of the second cylindrical part, and an inner transition annular groove is provided between the inner wall of the first cylindrical part and the inner wall of the second cylindrical part. The inner transition annular groove and the outer transition annular groove are located in the same plane. The electric heating tube is clamped inside the first cylindrical part and the second cylindrical part. When the first cylindrical part is screwed into the first circular hole, the conical hole compresses the second cylindrical part, causing the second cylindrical part to break off from the first cylindrical part. The second cylindrical part undergoes compression deformation to clamp the electric heating tube. When the second cylindrical section breaks off from the first cylindrical section, a breaking sound will be heard.

2. The 10KV electric heating tube generator for oilfield development according to claim 1, characterized in that, It also includes a clamping part, which is disposed at one end of the first cylindrical part, and the two ends of the first cylindrical part are the clamping part and the second cylindrical part, respectively.

3. The 10KV electric heating tube generator for oilfield development according to claim 1, characterized in that, The inner transition groove is a circular inner transition groove.

4. The 10KV electric heating tube generator for oilfield development according to claim 3, characterized in that, The outer transition groove is a triangular outer transition groove.

5. The 10KV electric heating tube generator for oilfield development according to claim 1, characterized in that, There is a gap between the heating tube body and the wall of the second circular hole.

6. The 10KV electric heating tube generator for oilfield development according to claim 1, characterized in that, A ceramic sleeve is fitted onto the heating element, and a connecting piece is installed on the heating element via a nut.

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