Insertion tube structure
By using a detachable upper and lower insertion tube structure and a limiting device, the problems of easy bending, breakage, and corrosion of single-diameter insertion tubes are solved, achieving precise insertion depth limiting and stable temperature measurement, reducing replacement costs and safety risks.
Patent Information
- Application Number
- CN202520262379.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-02-19
AI Technical Summary
In existing vertical tubular reactors or heat exchangers, single-diameter, full-length inserted inner tubes are prone to bending and breaking, have poor rigidity, and are costly to replace. They also pose risks of corrosion and contaminant entry, and the insertion depth is difficult to accurately determine.
The structure features a detachable upper and lower insertion tube, combined with a limiting device, sealing gland, and fin assembly to ensure precise insertion depth control, prevent bending and corrosion, and improve rigidity and stability.
It effectively avoids damage during transportation and storage, reduces replacement costs, ensures accurate insertion depth, prevents contaminants from entering, and improves the accuracy of temperature measurement and equipment safety.
Smart Images
Figure CN223580763U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to heat exchanger technical field especially relates to a plug-in pipe structure. BACKGROUND
[0002] At present, the temperature measuring plug-in pipe is usually used in the vertical column tube type reactor or heat exchanger for temperature monitoring, and the temperature measuring plug-in pipe has a temperature measuring wire. The structure of the temperature measuring plug-in pipe used in the vertical column tube type reactor or heat exchanger of domestic enterprises is usually a single-diameter full-length sleeve plug-in pipe structure. The specific structure form is a single-diameter full-length plug-in inner extension pipe inserted into the outer sleeve of the equipment body.
[0003] The above structure has the following problems:
[0004] 1. Because the diameter of the single-diameter full-length plug-in inner extension pipe is small and the length is long, generally more than 6 meters or even longer, and it cannot be disassembled, it is very easy to bend or break during transportation and storage. Once it occurs, the plug-in pipe cannot be smoothly placed into the heat exchange pipe of the reactor or heat exchanger, resulting in that the temperature in the heat exchange pipe cannot be measured. Moreover, in the actual use process, the diameter of the plug-in pipe is small and the length is long, thereby causing poor rigidity and frequent vibration of the distal end (i.e. the lower end).
[0005] 2. In the actual use process, the part of the temperature measuring plug-in pipe inserted into the inside of the heat exchange pipe often appears corrosion phenomenon, and the plug-in pipe needs to be replaced regularly. Once the plug-in pipe is replaced, the single-diameter full-length plug-in inner extension pipe needs to be replaced as a whole, and the replacement cost is high.
[0006] 3. Because the top opening of the single-diameter full-length plug-in inner extension pipe is not sealed, there is a risk that pollutants or toxic and harmful gases and liquids enter the inside of the plug-in pipe during daily operation or equipment shutdown, causing corrosion and explosion.
[0007] 4. Because there is no limiting device between the single-diameter full-length plug-in inner extension pipe and the sleeve flange cover, the plug-in pipe is fixed only by the friction force of the O-ring, and because the inside of the equipment cannot be observed, the appropriate insertion depth cannot be accurately determined during installation of the plug-in pipe. INVENTION CONTENTS
[0008] The utility model aims to at least solve one of the technical problems in the related art to some extent. To this end, the utility model embodiment provides a plug-in pipe structure, which avoids bending or damage during transportation and storage, facilitates replacement of the plug-in pipe, and accurately limits the insertion depth.
[0009] The utility model discloses an insert pipe structure, include: the upper section insert pipe and the lower section insert pipe, the outside connection of upper section insert pipe has the limiting device, the inside of upper section insert pipe has the first chamber, and the limiting device is suitable for defining the depth of upper section insert pipe insertion heat exchange pipe, and upper section insert pipe is located the top of upper tube plate, the lower end of lower section insert pipe is detachably connected in upper section insert pipe, and the inside of lower section insert pipe has the second chamber, and the second chamber is communicated with the first chamber, and the outer diameter of lower section insert pipe is less than the outer diameter of upper section insert pipe.
[0010] In some embodiments, the limiting device includes a limiting ring, a sealing gland and a sleeve flange cover, the limiting ring is fixedly connected to the outside of the upper section insert pipe, the sealing gland is sleeved on the outside of the upper section insert pipe and below the limiting ring, the sleeve flange cover is sleeved on the outside of the upper section insert pipe and below the sealing gland, the sealing gland and the sleeve flange cover are detachably fixedly connected, and the sleeve flange cover and the upper head pipe flange of the reactor or the heat exchanger are detachably fixedly connected.
[0011] In some embodiments, the top end of the upper section insert pipe is detachably connected with a pipe plug.
[0012] In some embodiments, the longitudinal section of the sealing gland is in a T-shaped structure, including a ring member and an insertion member fixedly connected, and the insertion member is located at the center of the ring member; a stepped hole is formed in the center of the sleeve flange cover, the stepped hole includes an upper end hole and a lower end hole in communication, the hole diameter of the upper end hole is larger than that of the lower end hole, an annular groove is formed between the upper end hole and the upper section insert pipe, the shape and size of the annular groove are matched with the insertion member, and the insertion member is inserted into the annular groove.
[0013] In some embodiments, a sealing ring is arranged at the bottom of the annular groove, and the insertion member extrudes the sealing ring to achieve sealing after being inserted into the annular groove.
[0014] In some embodiments, the lower section insert pipe is detachably connected with the upper section insert pipe through a connecting piece, the connecting piece includes an upper connecting pipe and a lower connecting pipe connected, the upper connecting pipe is connected with the upper section insert pipe, the inside of the lower connecting pipe has an internal thread, the upper end of the lower section insert pipe has an external thread, and the lower section insert pipe and the lower connecting pipe are connected through threads.
[0015] In some embodiments, a plurality of fin groups are fixedly connected to the outside of the lower section insert pipe from top to bottom, the fin groups are located inside the heat exchange pipe into which the lower section insert pipe is inserted, each fin group includes a plurality of fins, and the fins are uniformly arranged along the outer periphery of the lower section insert pipe.
[0016] In some embodiments, the fin groups are provided with six groups, and each fin group includes four fins.
[0017] In some embodiments, among the four fins of each fin group, two fins with 180-degree angular spacing are higher than the other two fins with 180-degree angular spacing.
[0018] In some embodiments, the fin angles of any two adjacent groups are staggered by 30-60 degrees, so that the fins of all fin groups form a staggered arrangement.
[0019] In some embodiments, the sealing gland is detachably connected to the sleeve flange cover by bolts, and the sleeve flange cover is detachably connected to the upper head nozzle flange of the reactor or heat exchanger by bolts. BRIEF DESCRIPTION OF DRAWINGS
[0020] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
[0021] Wherein:
[0022] Figure 1 The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
[0023] Figure 2 The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which: Figure 1 The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
[0024] Figure 3 The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which: Figure 1 The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
[0025] Figure 4 The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which: Figure 3 The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
[0026] Figure 5 The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which: Figure 4 The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
[0027] Figure 6 The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which: Figure 1 The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
[0028] Figure 7 The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
[0029] Figure 8 The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which: Figure 7 The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
[0030] REFERENCE NUMERALS:
[0031] 1. Pipe plug; 2. Limiting ring; 3. Sealing gland; 4. Sleeve flange cover; 5. Upper end cap flange; 6. Upper insertion tube; 7. Connecting parts; 701. Upper connecting tube section; 702. Lower connecting tube section; 8. Upper tube sheet; 9. Lower insertion tube; 10. Heat exchange tube; 11. Catalyst; 12. Sealing ring; 13. Fins. Detailed Implementation
[0032] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.
[0033] The insertion tube structure for a vertical tubular reactor or heat exchanger according to an embodiment of the present invention is described below with reference to the accompanying drawings.
[0034] like Figures 1-8 As shown, this utility model embodiment proposes an insertion tube structure, including: an upper insertion tube 6 and a lower insertion tube 9. A limiting device is connected to the outside of the upper insertion tube 6, and the upper insertion tube 6 has a first chamber inside. The limiting device is adapted to limit the depth of the upper insertion tube 6 inserted into the heat exchange tube. The upper insertion tube 6 is located above the upper tube sheet 8. The lower insertion tube 9 is detachably connected to the lower end of the upper insertion tube 6. The lower insertion tube 9 has a second chamber inside, which communicates with the first chamber. The outer diameter of the lower insertion tube 9 is smaller than the outer diameter of the upper insertion tube 6.
[0035] This embodiment of the invention designs the insertion tube as a detachably connected upper insertion tube 6 and lower insertion tube 9. During transportation and storage, the upper insertion tube 6 and lower insertion tube 9 can be disassembled for transport and storage. Before installation, they are assembled into a single unit, effectively preventing bending or damage. Furthermore, if the lower insertion tube is damaged, only the damaged lower insertion tube 9 needs to be replaced, effectively reducing costs. By setting a limiting device, the appropriate insertion depth can be accurately determined according to design requirements during the insertion of the insertion tube into the reactor or heat exchanger, achieving accurate positioning of the insertion tube in one step. The insertion tube structure of this embodiment of the invention can be widely used in chemical, biopharmaceutical, and other fields. Specifically, it can be applied to equipment such as reactors and heat exchangers, for example, vertical tube-and-shell reactors and vertical tube-and-shell heat exchangers.
[0036] It should be noted that the lower segment insertion pipe 9 has a temperature measuring wire inside for temperature measurement, and the temperature of the reactant needs to be monitored by inserting into the heat exchange pipe 10 which is fixedly connected to the upper tube plate 8. Since the heat exchange pipe 10 needs to be filled with catalyst 11, the outer diameter of the lower segment insertion pipe 9 needs to maintain the original size, and sufficient filling space needs to be left for the catalyst 11 and the reactant. That is, the rigidity cannot be improved by enlarging the outer diameter of the lower segment insertion pipe 9. Moreover, the insertion pipe measures the temperature at the center of the heat exchange pipe 10, not the temperature of the inner wall of the heat exchange pipe 10, so in use, the lower segment insertion pipe 9 needs to be prevented from touching the inner wall of the heat exchange pipe 10, otherwise it will seriously affect the accuracy of temperature measurement. If the outer diameter of the lower segment insertion pipe 9 is increased, it is possible that one side of the outer wall of the lower segment insertion pipe 9 will adhere to the inner wall of the heat exchange pipe 10, resulting in inaccurate temperature measurement.
[0037] In some embodiments, as shown in Figures 2-5 The limiting device includes a limiting ring 2, a sealing gland 3 and a sleeve flange cover 4. The limiting ring 2 is fixedly connected to the outside of the upper segment insertion pipe 6, the sealing gland 3 is sleeved on the outside of the upper segment insertion pipe 6 and located below the limiting ring 2, and the sleeve flange cover 4 is sleeved on the outside of the upper segment insertion pipe 6 and located below the sealing gland 3. The sealing gland 3 and the sleeve flange cover 4 are detachably fixedly connected, and the sleeve flange cover 4 and the upper head pipe flange 5 of the reactor or heat exchanger are detachably fixedly connected.
[0038] It should be noted that the installation position of the limiting ring 2 on the upper segment insertion pipe 6 is designed according to actual use conditions (such as the length of the heat exchange pipe 10, etc.).
[0039] Further, the limiting ring 2 and the upper segment insertion pipe 6 are fixedly connected by welding.
[0040] In some embodiments, as shown in Figure 2 The top end of the upper segment insertion pipe 6 is detachably connected with a pipe plug 1. During daily operation or equipment shutdown, it can effectively prevent the risk of corrosion and explosion caused by the entry of pollutants or toxic and harmful gases and liquids into the insertion pipe.
[0041] Further, the pipe plug 1 can be connected with the upper segment insertion pipe 6 by plugging or threaded connection.
[0042] Further, the bottom of the lower segment insertion pipe 9 is welded with a sealing member, so that the insertion pipe as a whole forms a closed cavity.
[0043] In some embodiments, as shown in Figure 3As shown, the longitudinal section of the sealing gland 3 is in T-shaped structure, including a ring-shaped part and an insert part fixedly connected, and the insert part is located at the center of the ring-shaped part; a stepped hole is formed at the center of the sleeve flange cover 4, the stepped hole includes an upper end hole and a lower end hole in communication, the hole diameter of the upper end hole is larger than that of the lower end hole, and an annular groove is formed between the upper end hole and the upper section insert tube 6, the shape and size of the annular groove are matched with the insert part, and the insert part is inserted into the annular groove.
[0044] Further, the fixed connection mode of the ring-shaped part and the insert part is integral mechanical processing or welding.
[0045] In some embodiments, as shown in Figure 3 As shown, the bottom of the annular groove is provided with a sealing ring 12, and after the insert part is inserted into the annular groove, the sealing ring is deformed under the pressing action of the sealing gland to fill the gap between the insert part and the annular groove, thereby achieving the sealing effect. The sealing effect of the connection between the sealing gland 3, the sleeve flange cover 4 and the upper section insert tube 6 is ensured.
[0046] Further, the sealing ring 12 is provided with double layers.
[0047] In some embodiments, as shown in Figure 6 As shown, the lower section insert tube 9 is detachably connected to the upper section insert tube 6 through the connecting piece 7, the connecting piece 7 includes an upper connecting tube section 701 and a lower connecting tube section 702 connected, the upper connecting tube section 701 is connected to the upper section insert tube 6, the inside of the lower connecting tube section 702 has an internal thread, the upper end of the lower section insert tube 9 has an external thread, and the lower section insert tube 9 and the lower connecting tube section 702 are connected through the thread connection. Through the thread connection mode, the upper section insert tube 6 and the lower section insert tube 9 can be quickly disassembled and assembled.
[0048] Further, the upper connecting tube section 701 and the lower connecting tube section 702 are an integral body, the upper connecting tube section 701 and the upper section insert tube 6 are integrally mechanically processed or welded, the outer diameter of the upper connecting tube section 701 is equal to that of the upper section insert tube 6, and the inner diameter of the upper connecting tube section 701 is equal to that of the upper section insert tube 6. The inner diameter of the lower connecting tube section 702 is equal to that of the lower section insert tube 9.
[0049] In some embodiments, as shown in Figure 7 and Figure 8 As shown, the outer side of the lower section insert tube 9 is fixedly connected to a plurality of fin groups from top to bottom, the fin groups are located inside the heat exchange tube 10 into which the lower section insert tube 9 is inserted, each fin group includes a plurality of fins 13, and the fins 13 are uniformly arranged along the outer periphery of the lower section insert tube 9. The outer diameter of the whole formed by the lower section insert tube 9 and the fins 13 is slightly smaller than the inner diameter of the heat exchange tube 10.
[0050] By arranging the fin groups in the heat exchange pipe 10, the support of the lower section insertion pipe 9 is more stable, the vibration of the lower end of the insertion pipe is effectively prevented, the measurement accuracy is improved, and the service life of the insertion pipe is prolonged.
[0051] The fin 13 also has a limiting effect, the lower section insertion pipe 9 measures the temperature at the center of the heat exchange pipe 10, and the fin 13 can prevent the lower section insertion pipe 9 from being close to the pipe wall of the heat exchange pipe 10, thereby preventing large errors in temperature measurement data.
[0052] Further, the fin 13 is in the shape of a round rod, the fin 13 is connected to the lower section insertion pipe 9 by welding, and the end of the fin 13 is rounded to prevent wear on the heat exchange pipe 10.
[0053] In some embodiments, the fin groups are provided in six groups, and each fin group includes four fins 13.
[0054] In some embodiments, among the four fins 13 of each fin group, the heights of two fins that are opposite at an angle of 180° are higher than the heights of the other two fins that are opposite at an angle of 180°.
[0055] In some embodiments, the angles of the fins of any upper and lower fin groups are staggered by 30°-60°, respectively, so that the fins of all fin groups form a staggered arrangement.
[0056] In order to avoid occupying too much area on the same cross section, provide sufficient flow area for the catalyst, and avoid the bridging effect of the catalyst in the heat exchange pipe due to the fins, which affects the loading effect of the catalyst.
[0057] In some embodiments, the sealing gland 3 and the sleeve flange cover 4 are detachably fixedly connected by bolts, and the sleeve flange cover 4 and the upper head pipe flange 5 of the reactor or heat exchanger are detachably fixedly connected by bolts.
[0058] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0059] In addition, the terms "first", "second", "third", etc. are used herein only to describe different instances, and are not to be construed as indicating or implying relative importance or a specific number of the technical features indicated. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0060] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0061] In the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.
[0062] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the description, the illustrative representation of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.
[0063] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.
Claims
1. An insertion tube structure, characterized in that, include: An upper insertion tube is provided, with a limiting device connected to its outer side. The upper insertion tube has a first chamber inside. The limiting device is adapted to limit the depth of the upper insertion tube inserted into the heat exchange tube. The upper insertion tube is located above the upper tube sheet. The lower insertion tube is detachably connected to the lower end of the upper insertion tube. The lower insertion tube has a second chamber inside, which communicates with the first chamber. The outer diameter of the lower insertion tube is smaller than the outer diameter of the upper insertion tube.
2. The insertion tube structure according to claim 1, characterized in that, The limiting device includes a limiting ring, a sealing gland, and a sleeve flange cover. The limiting ring is fixedly connected to the outside of the upper insertion tube. The sealing gland is sleeved on the outside of the upper insertion tube and located below the limiting ring. The sleeve flange cover is sleeved on the outside of the upper insertion tube and located below the sealing gland. The sealing gland and the sleeve flange cover are detachably and fixedly connected. The sleeve flange cover is detachably and fixedly connected to the upper end flange of the reactor or heat exchanger.
3. The insertion tube structure according to claim 1, characterized in that, The top end of the upper insertion tube is detachably connected to a tube plug.
4. The insertion tube structure according to claim 2, characterized in that, The sealing gland has a T-shaped longitudinal section and includes a fixedly connected annular member and an insert, with the insert located at the center of the annular member. A stepped hole is provided at the center of the sleeve flange cover. The stepped hole includes an upper end hole and a lower end hole that are connected. The diameter of the upper end hole is larger than the diameter of the lower end hole. An annular groove is formed between the upper end hole and the upper section of the insert tube. The shape and size of the annular groove are adapted to the insert, and the insert is inserted into the annular groove.
5. The insertion tube structure according to claim 4, characterized in that, A sealing ring is provided at the bottom of the annular groove. After the insert is inserted into the annular groove, it squeezes the sealing ring to achieve a seal.
6. The insertion tube structure according to claim 1, characterized in that, The lower insertion tube is detachably connected to the upper insertion tube via a connector. The connector includes an upper connecting tube segment and a lower connecting tube segment connected together. The upper connecting tube segment is connected to the upper insertion tube. The lower connecting tube segment has an internal thread, and the upper end of the lower insertion tube has an external thread. The lower insertion tube and the lower connecting tube are connected by a thread.
7. The insertion tube structure according to claim 1, characterized in that, Several sets of fin groups are fixedly connected from top to bottom on the outer side of the lower insertion tube. The fin groups are located inside the heat exchange tube into which the lower insertion tube is inserted. Each set of fin groups includes several fins, which are evenly distributed along the outer periphery of the lower insertion tube.
8. The insertion tube structure according to claim 7, characterized in that, In each group of four fins, the height of two fins that are 180° apart and opposite each other is higher than the height of the other two fins that are 180° apart and opposite each other.
9. The insertion tube structure according to claim 8, characterized in that, The angles of any two groups of fins are staggered by 30° to 60°, so that the fins of all the fin groups form an alternating arrangement.
10. The insertion tube structure according to claim 2, characterized in that, The sealing gland and the sleeve flange cover are detachably and fixedly connected by bolts, and the sleeve flange cover and the upper end cap flange of the reactor or heat exchanger are detachably and fixedly connected by bolts.