Heater upper tube sheet construction

Abstract

The application discloses a heater upper pipe box structure and relates to the technical field of heater equipment, which comprises a heater cylinder body, an upper pipe box arranged at the top of the heater cylinder body, a tube plate corresponding to the upper pipe box arranged at the top of the heater cylinder body, a communication pipe wall in communication with the side wall of the upper pipe box, a flange ring arranged on the pipe opening side wall of the communication pipe wall, a sight window frame body rotatably arranged on the side wall of the flange ring, a sight glass arranged in the sight window frame body and used for observing the inside of the upper pipe box, a connecting seat corresponding to the sight window frame body arranged outside the flange ring, a clamping block connected with the connecting seat and arranged on the sight window frame body, and a sealing ring arranged on the side wall of the sight window frame body and facing the flange ring. The sight window frame body with the sight glass is rotatably arranged on the flange ring of the communication pipe wall, and the connecting structure of the connecting seat and the clamping block and the sealing ring are matched, so that the deposition on the tube plate in the upper pipe box can be directly observed through the sight glass, and the deposited salt-like attachments on the tube plate in the upper pipe box can be cleaned after the machine is stopped and the sight window frame body is opened.

Description

Technical Field

[0001] This application relates to the field of heater equipment technology, and in particular to the structure of the heater upper tube box. Background Technology

[0002] Heaters, as an important heat transfer device, are widely used in industrial fields such as chemical, food processing, pharmaceutical, and energy, mainly for heating, heat preservation, or heat exchange of fluid media.

[0003] The upper tube box is one of the core components of the heater. One end connects to the external pipeline to introduce or export the medium, while the other end connects to the tube bundle of the heater body through the tube sheet, serving to guide, separate, and protect the tube bundle. As a key connecting component, the tube sheet not only fixes the ends of the tube bundle but also undertakes the sealing function of separating the shell-side and tube-side media. Its surface cleanliness directly affects the heat transfer efficiency and operational stability of the heater.

[0004] Regarding the aforementioned technologies, the inventors believe that the upper tube box of the heater is usually designed with a closed structure, and the connection area between the upper tube box and the tube sheet is a closed space. When the heater processes media containing easily deposited components, the surface of the tube sheet is prone to deposits due to factors such as media evaporation and temperature changes. Operators cannot intuitively judge the deposit situation on the surface of the tube sheet, resulting in untimely cleaning of deposits. Utility Model Content

[0005] The purpose of this application is to provide a heater upper tube box structure to improve the problem that the connection area between the upper tube box and the tube sheet is a closed space. Due to factors such as medium evaporation and temperature changes, deposits are easily formed on the surface of the tube sheet. Operators cannot intuitively judge the deposit situation on the surface of the tube sheet, resulting in the problem of untimely deposit cleaning.

[0006] The heater upper tube box structure provided in this application adopts the following technical solution:

[0007] The heater upper tube box structure includes a heater cylinder, an upper tube box at the top of the heater cylinder, a tube plate corresponding to the upper tube box at the top of the heater cylinder, a connecting pipe wall connected to the side wall of the upper tube box, a flange ring at the pipe opening side wall of the connecting pipe wall, a viewing window frame rotatably mounted on the side wall of the flange ring, a viewing mirror for observing the interior of the upper tube box in the viewing window frame, a connecting seat corresponding to the viewing window frame on the outside of the flange ring, a locking block connected to the connecting seat in the viewing window frame, and a sealing ring facing the flange ring in the viewing window frame.

[0008] By adopting the above technical solution, a viewing window frame with a sight glass is rotatably installed on the flange ring of the connecting pipe wall. With the connection structure of the connecting seat and the locking block and the sealing ring, the deposition inside the upper pipe box and on the surface of the tube sheet can be directly observed through the sight glass, solving the problem that the traditional closed structure cannot observe. Furthermore, the viewing window frame can be opened after shutdown to clean the salt deposits on the tube sheet in the upper pipe box.

[0009] Optionally, the flange ring has an installation groove corresponding to the side wall of the window frame and the sealing ring, and the inner circular side wall of the installation groove is provided with a plurality of sealing strips that abut against the edge of the window frame.

[0010] By adopting the above technical solution, the mounting groove of the flange ring can accurately position the rotating window frame, preventing the window frame from shifting when it is opened and closed. The sealing strip on the inner circular side wall of the mounting groove abuts against the edge of the window frame, adding a second sealing line in addition to the basic sealing ring, further enhancing the sealing performance between the window frame and the flange ring, reducing the risk of media leakage from gaps. At the same time, the sealing strip can buffer the contact stress when the window frame is opened or closed, protecting the surface of the component from wear.

[0011] Optionally, the circumferential sidewall of the window frame is provided with a guide slope.

[0012] By adopting the above technical solution, the guide slope of the circumferential sidewall of the window frame plays a guiding role in the process of rotating and installing the window frame into the flange ring mounting groove, reducing the probability of direct collision between the edge of the window frame and the sidewall of the mounting groove, and making the window frame slide into the mounting groove more smoothly.

[0013] Optionally, the sealing strip has a circular cross-section, and the inner circular sidewall of the mounting groove has a corresponding engagement groove for the sealing strip.

[0014] By adopting the above technical solution, the circular sealing strip has better elastic deformation ability, which allows the guide slope of the window frame to move along the circumferential side wall of the sealing strip when the window frame is closed. When it comes into contact with the edge of the window frame, it can fill the gap more fully and improve the sealing effect. The locking groove on the inner circular side wall of the mounting groove can limit and fix the circular sealing strip, preventing the sealing strip from shifting or falling off when the window frame rotates or the equipment vibrates.

[0015] Optionally, the wall of the connecting pipe is inclined toward the tube sheet.

[0016] By adopting the above technical solution, the connecting pipe wall is tilted towards the tube sheet, so that the observation direction of the sight glass is closer to the surface of the tube sheet, reducing the obstruction of the observation line by the connecting pipe wall itself and expanding the effective observation range of the sight glass.

[0017] Optionally, the flange ring and the connecting seat are provided with positioning grooves corresponding to the locking block, the locking block is provided with a limit groove at the end away from the window frame, and the connecting seat is rotatably provided with a limit rod that fits against the inner side wall of the limit groove.

[0018] By adopting the above technical solution, the positioning grooves of the flange ring and the connecting seat can position the locking block. After the limiting rod rotates, it fits against the inner side wall of the limiting groove of the locking block, which can firmly fix the window frame on the flange ring.

[0019] Optionally, the end of the limiting rod is threadedly connected to a fixing nut that abuts against the side wall of the connecting seat.

[0020] By adopting the above technical solution, after the fixing nut at the end of the limiting rod abuts against the side wall of the connecting seat, the rotational freedom of the limiting rod can be restricted by the threaded locking force, preventing the limiting rod from accidentally rotating out of the limiting groove when the equipment vibrates or is touched by external force. This further enhances the connection reliability between the locking block and the connecting seat, ensuring the long-term stability of the fixed structure of the viewing window frame. At the same time, when the viewing window is opened, the fixing nut can be rotated away from the connecting seat, making it easier to rotate the limiting rod later to open the viewing window, and providing convenience for subsequent maintenance or cleaning of the viewing window.

[0021] Optionally, the flange ring is rotatably provided with a plurality of pressure blocks that abut against the outer side of the window frame.

[0022] By adopting the above technical solution, the pressure block rotatably set on the flange ring abuts against the outside of the window frame, and can apply a clamping force from the circumferential direction of the window frame. With the axial fixation of the locking block and the limiting rod, a multi-directional fixing structure is formed, which prevents the window frame from being damaged due to uneven stress caused by the pressure inside the heater after closing. This further improves the tightness of the fit between the window frame and the flange ring and enhances the overall sealing effect.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. A viewing window frame with a sight glass is rotated on the flange ring of the connecting pipe wall. With the connection structure of the connecting seat and the locking block and the sealing ring, the deposition inside the upper pipe box and the surface of the tube sheet can be directly observed through the sight glass, solving the problem that the traditional closed structure cannot observe. After the machine is stopped, the viewing window frame can be opened to clean the salt deposits on the tube sheet in the upper pipe box.

[0025] 2. The connecting pipe wall is tilted towards the tube sheet, so that the observation direction of the sight glass is closer to the surface of the tube sheet, reducing the obstruction of the observation line by the connecting pipe wall itself and expanding the effective observation range of the sight glass.

[0026] 3. After the pressure block rotatably mounted on the flange ring abuts against the outer side of the window frame, it can apply a clamping force from the circumferential direction of the window frame. Combined with the axial fixation of the locking block and the limiting rod, a multi-directional fixing structure is formed to prevent the window frame from being damaged due to uneven stress caused by the pressure inside the heater after closing. This further improves the tightness of the fit between the window frame and the flange ring and enhances the overall sealing effect. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the heater's upper tube box;

[0028] Figure 2 This is a partial sectional view of the upper pipe box section.

[0029] In the diagram, 1. Heater shell; 2. Upper tube box; 21. Connecting pipe wall; 22. Flange ring; 23. Connecting seat; 24. Mounting groove; 241. Sealing strip; 242. Engaging groove; 25. Positioning groove; 26. Limiting rod; 27. Fixing nut; 28. Pressure block; 3. Tube sheet; 4. Viewing window frame; 41. Sight glass; 42. Engaging block; 421. Limiting groove; 43. Guide slope; 5. Sealing ring. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 -Appendix Figure 2 This application will be described in further detail below.

[0031] The structure of the heater upper tube box is as follows: Figure 1 and Figure 2 The device includes a heater cylinder 1. An upper tube box 2 is fixedly connected to the top of the heater cylinder 1 via a connecting flange, a sealing gasket, and connecting bolts. A tube sheet 3, which communicates with the heat exchange tubes, is sealed and installed between the top of the heater cylinder 1 and the upper tube box 2. A connecting tube wall 21 is welded to the side wall of the upper tube box 2. The end of the connecting tube wall 21 away from the upper tube box 2 is inclined. In this embodiment, the inclination angle of the connecting tube wall 21 can be set to 30°-60° according to the observation requirements, so that the observation direction of the sight glass 41 is closer to the surface of the tube sheet 3, reducing the obstruction of the observation line by the structure of the connecting tube wall 21 itself, and expanding the effective observation range of the sight glass 41. A flange ring 22 is welded and fixed to the side wall of the tube opening of the connecting tube wall 21.

[0032] Reference Figure 1 and Figure 2An installation groove 24 is provided on the side of the flange ring 22 near the wall 21 of the connecting pipe. An annular locking groove 242 is provided on the inner circular side wall of the installation groove 24. A sealing strip 241 with a circular cross section is embedded in the locking groove 242. The material of the sealing strip 241 can be fluororubber. A sight glass 41 frame is rotatably hinged on the outside of the flange ring 22. The sight glass 41 is a stainless steel annular frame structure. A sight glass 41 made of corrosion-resistant glass is embedded in its inner side. A connecting seat 23 is welded on the outside of the flange ring 22. A locking block 42 corresponding to the connecting seat 23 is welded on the outside of the sight glass 4. A positioning groove 25 corresponding to the locking block 42 is provided on the connecting seat 23.

[0033] Reference Figure 1 and Figure 2 The viewing window frame 4 has a guide slope 43 on its circumferential side wall. A heat-resistant silicone sealing ring 5 is sandwiched between the edge of the viewing window frame 4 and the flange ring 22. A limiting groove 421 is opened at the end of the locking block 42 away from the viewing window frame 4. A limiting rod 26 is rotatably connected in the connecting seat 23 via a pin. The limiting rod 26 can be rotated to a position that fits against the inner side wall of the limiting groove 421. A fixing nut 27 is threaded to the end of the limiting rod 26 away from the pin. After the fixing nut 27 is tightened, it abuts against the side wall of the connecting seat 23 to fix the viewing window frame 4. The flange ring 22 is provided with several pressure blocks 28 rotatably along its circumference via a rotating shaft. The pressure blocks 28 can be rotated to a position that abuts against the outer side wall of the viewing window frame 4, and can apply a clamping force from the circumferential direction of the viewing window frame 4 to prevent the viewing window frame 4 from being damaged due to uneven force caused by the pressure inside the heater after it is closed.

[0034] The implementation principle of this application embodiment is as follows:

[0035] Rotate the viewing window frame 4 at the pipe opening position of the connecting pipe wall 21 of the upper pipe box 2, so that the viewing window frame 4 is adapted to the mounting groove 24 of the flange ring 22 of the connecting pipe wall 21. After the limiting rod 26 in the connecting seat 23 on the side wall of the flange ring 22 rotates, it fits against the inner side wall of the limiting groove 421 of the locking block 42. Then tighten the fixing nut 27 so that it abuts against the side wall of the connecting seat 23 to fix the position of the limiting rod 26. Fix the viewing window frame 4, which is integrated with the locking block 42, in the mounting groove 24 of the flange ring 22. The operator can clearly observe the deposition on the surface of the tube sheet 3 through the sight glass 41 of the viewing window frame 4 along the inclined connecting pipe wall 21. After stopping the machine, rotate the fixing nut 27 away from the connecting seat 23 and rotate the limiting rod 26 to open the viewing window frame 4 to clean the salt deposits on the tube sheet 3 in the upper pipe box 2.

[0036] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. The structure of the heater upper tube box, characterized in that: The device includes a heater cylinder (1), an upper tube box (2) is provided on the top of the heater cylinder (1), a tube plate (3) corresponding to the upper tube box (2) is provided on the top of the heater cylinder (1), a connecting tube wall (21) is provided on the side wall of the upper tube box (2), a flange ring (22) is provided on the side wall of the connecting tube wall (21), a viewing window frame (4) is rotatably provided on the side wall of the flange ring (22), a viewing mirror (41) for observing the inside of the upper tube box (2) is provided in the viewing window frame (4), a connecting seat (23) corresponding to the viewing window frame (4) is provided on the outside of the flange ring (22), a locking block (42) connected to the connecting seat (23) is provided on the viewing window frame (4), and a sealing ring (5) is provided on the viewing window frame (4) facing the flange ring (22).

2. The heater upper tube box structure according to claim 1, characterized in that: The flange ring (22) has an installation groove (24) corresponding to the side wall of the window frame (4) and the sealing ring (5). The inner circular side wall of the installation groove (24) is provided with a number of sealing strips (241) that abut against the edge of the window frame (4).

3. The heater upper tube box structure according to claim 2, characterized in that: The circumferential sidewall of the window frame (4) is provided with a guide slope (43).

4. The heater upper tube box structure according to claim 3, characterized in that: The sealing strip (241) has a circular cross-section, and the inner circular sidewall of the mounting groove (24) is provided with a locking groove (242) corresponding to the sealing strip (241).

5. The heater upper tube box structure according to claim 4, characterized in that: The connecting pipe wall (21) is inclined toward the tube sheet (3).

6. The heater upper tube box structure according to claim 5, characterized in that: The flange ring (22) and the connecting seat (23) are provided with positioning grooves (25) corresponding to the locking block (42). The locking block (42) has a limiting groove (421) at one end away from the window frame (4). The connecting seat (23) is rotatably provided with a limiting rod (26) that fits against the inner side wall of the limiting groove (421).

7. The heater upper tube box structure according to claim 6, characterized in that: The end of the limiting rod (26) is threadedly connected to a fixing nut (27) that abuts against the side wall of the connecting seat (23).

8. The heater upper tube box structure according to claim 7, characterized in that: The flange ring (22) is rotatably provided with several pressure blocks (28) that abut against the outside of the window frame (4) along its circumferential direction.

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