WO2016155582A1 - 一种列管式换热器管箱密封结构 - Google Patents

一种列管式换热器管箱密封结构 Download PDF

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Publication number
WO2016155582A1
WO2016155582A1 PCT/CN2016/077457 CN2016077457W WO2016155582A1 WO 2016155582 A1 WO2016155582 A1 WO 2016155582A1 CN 2016077457 W CN2016077457 W CN 2016077457W WO 2016155582 A1 WO2016155582 A1 WO 2016155582A1
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WIPO (PCT)
Prior art keywords
lip
tube
box
barrel section
heat exchanger
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Application number
PCT/CN2016/077457
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English (en)
French (fr)
Inventor
陈孙艺
Original Assignee
茂名重力石化机械制造有限公司
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Publication of WO2016155582A1 publication Critical patent/WO2016155582A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F11/00—Arrangements for sealing leaky tubes and conduits
    • F28F11/02—Arrangements for sealing leaky tubes and conduits using obturating elements, e.g. washers, inserted and operated independently of each other

Definitions

  • the present application relates to the sealing technology of the tubular heat exchanger tube box in the equipment engineering, in particular to the special one for the heat exchange energy-saving equipment for petroleum refining and chemical industry, coal chemical industry, chemical fertilizer industry, air conditioning, air cooling and electric power facilities.
  • the tubular tube heat exchanger tube box sealing structure is provided.
  • the tube-and-tube heat exchanger is the most widely used heat exchanger, and is widely used in the "liquid-liquid” in the fields of chemical industry, petroleum, medicine, food, light industry, metallurgy, coking, etc.
  • Convective heat transfer of "steam-steam”, “steam-liquid” heat exchange, and heat exchange condensation process such as steam condensation and liquid evaporation heat transfer.
  • the general structure of the tubular heat exchanger in the prior art is as shown in FIG. 1 , and generally consists of main components such as the tube bundle 2, the shell 3, and the tube box 4, wherein the tube bundle 2 is a tubular heat exchanger.
  • the core member, the tube bundle 2 is generally composed of a heat exchange tube 1, a support plate (or a baffle) and a tube sheet, and the rows of heat exchange tubes 1 are supported by a support plate (or a baffle), and the both ends thereof are inserted into the tube sheet.
  • the tube hole is connected to the tube plate to ensure the sealing and strength of the joint.
  • the heat exchange tube 1 can be divided into several processes, so that the medium flows back and forth in the heat exchange tube 1, thereby prolonging the heat exchange process and increasing the heat exchange time, fully Shell-side medium heat transfer outside the tube.
  • the tube sheet and the tube shell 3 and the tube box 4 are fixedly assembled by welding or flange bolts and gaskets to obtain a tube-and-tube heat exchanger.
  • the heating furnace mode is formed; when the heat exchange medium in the tube of the heat exchange tube 1 is a heat medium, outside the tube
  • the heat exchange medium is forced convection air, it constitutes a cooler mode; the furnace mode and the cooler mode are both heat exchange modes of the heat exchanger.
  • the tubular tube heat exchanger has a relatively mature manufacturing process and high safety performance, and is a key energy-consuming device in the heat exchange equipment.
  • the inlet and outlet nozzles are usually designed to be directly butt welded to the pipeline even if the diameter is small, and the flange connection method is not used;
  • the large-diameter tube sheet is welded to the tube shell and the tube cylinder on both sides, so that the end of the tube box cannot be welded with the end cover by equal-strength weld.
  • the method mainly considers that the maintenance personnel can go in from the end of the pipe box to carry out repair work such as detecting the pipe head.
  • the T-shaped groove metal pad flange sealing structure for example, the T-shaped groove metal pad flange sealing structure, the thin-walled ⁇ -ring structure of the sealing welding flange sealing structure, the thread locking ring sealing structure and the like are formed.
  • Forced sealing structure self-tightening sealing structures such as B-rings, C-rings, O-rings, wedge rings, Qazari seals, Bridgman seals, etc. are also formed.
  • the structure is not enough because of the strengthening effect, especially with the deepening of practical application, people find that these structures themselves have some disadvantages.
  • the main problems are:
  • the structure is complex.
  • the structure is huge.
  • the flange and end cover are thick and have no temperature compensation adjustment.
  • the applicant developed a sealing structure for the tube-and-tube heat exchanger tube box which can improve the assembly quality of the tube box, has a simple structure and good sealing performance, and can also reduce the overall manufacturing cost
  • the sealing structure includes a spherical tube tube section, a tube box end cover, a spherical membrane sealing disk disposed between the end of the tube tube barrel section and the tube box end cover, the spherical membrane sealing disk comprises a spherical membrane disposed along the middle and a spherical mask a flat pad side ring provided on the outer peripheral side of the piece, the end of the pipe barrel barrel section and the pipe box end cover are fixedly connected by a stud nut, and the flat pad side ring is clamped to the pipe box by the stud nut
  • the end of the tubular section is clamped to the end cover of the pipe box, wherein the pipe casing section is provided with a stop step along the end face of the pipe casing section, and the stop step includes the first step surface and the
  • the elastic metal sealing ring is matched with the sealing ring groove for double sealing, and the two elastic metal sealing rings can simultaneously cooperate with the groove wall of the corresponding sealing ring groove to generate a slight expansion deformation to further clamp the sealing.
  • the two cooperate with each other, there is no interference effect of mutual interference and sealing force, and they have mutual compensation function; however, the processing of the seal ring groove in the above structure is complicated, the manufacturing cost is high, and the manufacturing cycle is long.
  • the seal of the simple seal ring groove and the metal seal ring is a dynamic seal, and at least two seal ring grooves are required with at least two elastic metal seal rings to achieve a better sealing effect.
  • the applicant once again combined the diaphragm sealing technology with the problems existing in the end of the tube-and-tube heat exchanger tube box, and developed an improved tube box end seal structure, which has extremely far-reaching and significant significance in the field of engineering technology. .
  • the purpose of the present application is to provide a tube end that can avoid direct welding by avoiding the deficiencies in the prior art.
  • the edge of the tube-type heat exchanger tube box can be used repeatedly and has high utilization rate, simple structure, short manufacturing cycle, low cost, good sealing performance and further improved assembly quality of the tube box. Welding seal structure.
  • a tubular tube heat exchanger tube box sealing structure comprising a diaphragm sealing disk disposed between an end of the tube barrel barrel and the tube box end cover, the diaphragm sealing disk comprising a diaphragm disposed in the middle a flat bezel ring disposed along the outer peripheral side of the diaphragm, the flat bezel ring is clamped by the stud nut, one end face is clamped to the end of the pipe barrel barrel section, and the other end face is clamped to the pipe box end cap
  • the end of the tube barrel section is provided with a convex box lip
  • the flat pad side ring is provided with a protruding pad lip
  • the end of the tube box tube section passes through the box lip and the The pad lip is tightly sealed to the diaphragm sealing disk.
  • the convex pad lip provided by the flat pad edge ring, the angle between the pad lip protruding direction and the axial direction of the tube barrel section is set to be greater than or equal to 0° and less than or equal to 90°;
  • the protruding box lip provided at the end of the tube barrel section, the angle between the protruding direction of the box lip and the axial direction of the tube barrel section is set to be greater than or equal to 0° and less than or equal to 90°.
  • the angle between the protruding direction of the lip and the axial direction of the tube barrel section is set to 0°, and the lip is an axial lip; the box lip protrudes direction and the tube barrel section
  • the angle between the axial directions is set to 0°, the box lip is an axial box lip; the end of the tube barrel barrel passes the axial box lip and the axial pad lip and the flat pad
  • the edge ring is tightly sealed.
  • the angle between the protruding direction of the lip and the axial direction of the tube barrel section is set to 90°, and the lip is a radial lip; the box lip protrudes direction and the tube barrel section
  • the angle between the axial directions is set to 90°, the box lip is a radial box lip; the end of the tube barrel section passes the radial box lip and the radial pad lip and the flat pad
  • the edge ring is tightly sealed.
  • the angle between the protruding direction of the lip and the axial direction of the tube barrel section is set to be greater than 0° and less than 90°, and the lip is a tilting lip; the box lip protrudes in a direction
  • the angle between the axial directions of the tube barrel segments is set to be greater than 0° and less than 90°, the box lip is a tilting box lip; the end of the tube box barrel section passes through the tilting box lip and the tilting pad The lip is tightly sealed to the flat bezel ring.
  • the angle between the protruding direction of the box lip and the axial direction of the tube barrel section is set to 0°, and the box lip is an axial box lip; the lip protruding direction and the tube barrel section
  • the angle between the axial directions is set to be greater than 0° and less than 90°, the lip is a tilting lip; the end of the tubular barrel section passes through the axial box lip and the inclined lip
  • the flat bezel ring is tightly sealed.
  • the box lip is disposed at a sealing stop step of the end of the tube barrel section.
  • the protruding pad lip provided by the flat pad edge ring and the flat pad side ring are integrally arranged, or the protruding pad lip of the flat pad edge ring and the flat pad
  • the side ring is a split type welding assembly structure.
  • the end of the pipe barrel section is provided with a unitary structure in which the protruding box lip and the end of the tube box barrel are integrally arranged, or the end of the tube box section is provided with a convex portion.
  • the box lip and the end of the tube barrel section are separated by a combined welding structure.
  • a tubular tube heat exchanger tube box sealing structure comprising a diaphragm sealing disk disposed between an end of the tube barrel barrel and the tube box end cover, the diaphragm sealing disk comprising a diaphragm disposed in the middle And a flat bezel set along the outer peripheral side of the diaphragm, the flat bezel is at Under the action of the stud nut, one end surface is clamped to the end of the tube barrel section, and the other end surface is clamped to the tube box end cover, wherein the flat pad side ring is provided with a convex pad lip. The end of the tube barrel section is tightly sealed to the diaphragm sealing disk by the lip.
  • an angle between the protruding direction of the lip and the axial direction of the tube barrel section is set to 90°, and the lip is a radial lip; the end of the tube barrel passes through the diameter
  • the pad lip is tightly sealed to the flat bezel ring.
  • the protruding pad lip provided by the flat pad edge ring and the flat pad side ring are integrally arranged, or the protruding pad lip of the flat pad edge ring and the flat pad
  • the side ring is a split type welding assembly structure.
  • a tubular heat exchanger tube box sealing structure comprising a diaphragm sealing disk disposed between an end of the tube barrel barrel and the tube box end cover, the diaphragm sealing disk comprising a diaphragm disposed in the middle And a flat pad side ring disposed along the outer peripheral side of the diaphragm, the flat pad side ring is under the action of the stud nut, one end face is clamped to the end of the pipe barrel barrel section, and the other end face is clamped to the pipe box end a cover, wherein the end of the tube barrel section is provided with a protruding box lip, and the end of the tube barrel section is tightly sealedly connected to the diaphragm sealing disk by the box lip.
  • an angle between the convex direction of the box lip and the axial direction of the tube barrel section is set to 90°, and the box lip is a radial box lip; the end of the tube barrel section passes through the diameter
  • the tank lip is tightly sealed to the diaphragm sealing disk.
  • the radial box lip is machined with at least one step toward a side of the tube end cap, the end of the tube barrel section being sealed to the diaphragm by a stepped surface of the radial box lip The plate is tightly sealed.
  • the end of the tube barrel section is provided with a unitary structure in which the protruding box lip and the end of the tube box barrel section are integrally arranged, or the end of the tube box barrel section is provided with a convex part.
  • the box lip and the end of the tube barrel section are separated by a combined welding structure.
  • a tube-and-tube heat exchanger tube box sealing structure of the present application includes three technical solutions, one of which is that the end of the tube box barrel section is provided with a convex box lip, and the flat pad side ring is arranged a protruding lip, the end of the tube barrel section being tightly sealed with the diaphragm sealing disk by the box lip and the lip; secondly, the flat pad side ring is provided with a convex a lip of the tube, the end of the tube barrel section is tightly sealed with the flat pad edge ring by the pad lip; and thirdly, the end of the tube tube barrel section is provided with a protruding box lip, The end of the tube barrel section is tightly sealed to the diaphragm sealing disk by the box lip.
  • the direct welding of the end of the original pipe box and the flat bead ring is changed to the welding of the lip of the box lip and/or the lip of the lip, thereby avoiding the damage of the end of the pipe box and the flat bead ring by direct welding.
  • the lip can be repeatedly used repeatedly, thereby improving the utilization rate.
  • the tubular tube heat exchanger tube box sealing structure integrates various structural advantages, and the design technology is simple and mature, the sealing performance is good, the structure is simple, and the manufacturing cycle is simple. Short and low cost can further improve the assembly quality of the pipe box.
  • the box lip and the lip are provided with a suitable height or length.
  • a small lip is removed when the diaphragm sealing disc is removed.
  • a lip height of 20 mm can be provided.
  • FIG. 1 is a schematic view showing the structure of a tubular heat exchanger in the prior art.
  • FIG. 2 is a partial structural schematic view of a tube-and-tube heat exchanger tube box sealing structure of the present application.
  • FIG. 3 is a partial structural schematic view of a tube-and-tube heat exchanger tube box sealing structure of the present application.
  • FIG. 4 is a partial structural schematic view of a tube-and-tube heat exchanger tube box sealing structure of the present application.
  • FIG. 5 is a partial structural schematic view of a tube-and-tube heat exchanger tube box sealing structure of the present application.
  • FIG. 6 is a partial structural schematic view of a tube-and-tube heat exchanger tube box sealing structure of the present application.
  • FIG. 7 is a partial structural schematic view of a tubular tube heat exchanger tube box sealing structure of the present application.
  • FIG. 8 is a partial structural schematic view of a tube-and-tube heat exchanger tube box sealing structure of the present application.
  • FIG. 9 is a partial structural schematic view of a tube-and-tube heat exchanger tube box sealing structure of the present application.
  • FIG. 10 is a partial structural schematic view of a tube-and-tube heat exchanger tube box sealing structure of the present application.
  • Figure 11 is a partial structural schematic view showing a sealing structure of a tubular heat exchanger tube box of the present application.
  • One of the specific embodiments of the tubular tube heat exchanger tube box sealing structure of the present application includes an end portion disposed between the tube barrel barrel and the tube end cap 6 a diaphragm sealing disk 7 comprising a diaphragm 71 disposed in the middle and a flat pad ring 72 disposed along the outer peripheral side of the diaphragm 71.
  • the flat pad ring 72 is under the action of the stud nut 10 One end is clamped to the end of the tube barrel section, and the other end is clamped to the tube box end cover 6.
  • the improvement of the present application is that the end of the tube barrel section is provided with a convex box lip, and the flat pad side ring 72 is provided with a convex The pad lip, the end of the tube barrel section is tightly sealed to the diaphragm sealing disk 7 by the box lip and the pad lip.
  • the direct welding of the original tube end 5 and the flat edge ring 72 is changed to the welding of the lip of the box lip and the lip, which not only facilitates the welding and dismounting operation, but also avoids the direct welding pair.
  • the damage of the end portion 5 of the pipe box and the flat edge ring 72 at the same time, can be repeatedly welded due to the lip, which improves the utilization rate and effectively prolongs the service life.
  • the box lip and the lip are provided with a suitable height or length. Each time the equipment is repaired, the diaphragm sealing disc 7 is removed, and a small lip is removed.
  • the height of the lip of 4 mm can be provided by removing the lip height of 4 mm each time. 5 inspection losses, plus the last lipless welding, a total of 6 inspections, the normal operation of the heat exchanger is 4 years of maintenance, the lip seal sealing structure of the box has a service life of 24 years, more than the bundle The service life is comparable to the service life of the heat exchanger housing.
  • the protruding pad lip provided by the flat pad side ring 72 and the flat pad side ring 72 are integrally arranged, or the protruding pad lip and the flat pad edge 72 are provided.
  • the flat pad side ring 72 is a split type welding assembly structure; the end portion of the pipe box tube section is provided with a unitary structure in which a protruding box lip and an end portion of the tube box barrel section are integrally provided, or The end of the tube barrel section is provided with a protruding box lip and an end of the tube box barrel section being a split welding assembly structure.
  • the welding assembly structure may be a direct welding of the same material, or a combination welding of the different materials through the transition layer material.
  • the lip When the height of one of the lips is reduced, the lip is retracted to no lip, and the sealing welding may be performed on the first place. A layer of weldable material is deposited and the other lip is sealed to the weld overlay.
  • the protruding box lip and the end of the tube barrel section are either an integrated whole structure or a split type welding assembly structure, and the protruding lip and flat pad edge ring 72 Any tightly sealed connection in the integrated structure or in the split welding assembly.
  • the box lip may be disposed at a sealing end step of the end of the tube barrel section, and the flat pad side ring 72 and the intermediate diaphragm 71 may be transitioned with different thicknesses; the box lip may also be
  • the sealing bead step provided at the end of the tube barrel section is such that the flat pad ring 72 and the intermediate diaphragm 71 have equal thickness transitions.
  • the application can be specifically applied to the heat exchange requirements of petroleum refining and chemical industry, coal chemical industry, chemical fertilizer, air conditioning, air cooling, electric power equipment and the like, including application methods for heating or cooling the medium, and is particularly suitable for high temperature and high pressure hydrogen load fluctuation.
  • the working condition is also suitable for manholes of pressure equipment in similar working conditions.
  • a tube-and-tube heat exchanger tube box sealing structure of the present application can be applied to a flat welding flange, a butt welding flange, a long neck flange, a wide surface flange, and a narrow surface. Flanges, reverse flanges and cylindrical ends, conical ends, flanges, heat exchanger tubes, heat exchanger tube sheets, blind covers, etc.
  • the second embodiment of the tube-and-tube heat exchanger tube sealing structure of the present application is the same as that of the first embodiment, and the unexplained features in the embodiment are as in the first embodiment. The explanation is not repeated here.
  • the difference between the embodiment and the embodiment 1 is that the flat pad lip 72 is provided with a protruding lip, the lip protruding direction and the axial direction of the tube barrel section.
  • the angle between the two is set to be greater than or equal to 0° and less than or equal to 90°; the protruding box lip provided at the end of the tube barrel section, the convex direction of the box lip and the axial direction of the tube barrel section The angle is set to be greater than or equal to 0° and less than or equal to 90°.
  • the lip protrudes in the axial direction of the flat pad ring 72.
  • the pad lip is convex along the radial direction of the flat pad ring 72.
  • the angle between the protruding direction of the protruding lip of the flat pad ring 72 and the axial direction of the tube barrel section is greater than 0° and less than 90°, the lip along the flat pad ring 72 Tilting out.
  • the box lip protrudes along the axial direction of the tube box;
  • the angle between the protruding direction of the protruding box lip of the end of the tube barrel section and the axial direction of the tube barrel section is 90°, the box lip protrudes in the radial direction of the tube box;
  • the angle between the protruding direction of the protruding box lip provided at the end of the tube barrel section and the axial direction of the tube barrel section is greater than 0° and less than 90°, the box lip protrudes obliquely along the tube box.
  • the single angle joint welding of the original tube end 5 and the flat edge ring 72 is changed to the radial lip welding, the axial lip welding or the inclination of 0° to 90°.
  • the lip welding not only facilitates the welding and dismounting operation, but also avoids the damage of the tube end 5 and the flat edge ring 72 by direct welding.
  • the lip can be repeatedly welded repeatedly, the utilization rate is improved and the length is effectively extended. Its service life.
  • the box lip and the lip are provided with a suitable height or length. Each time the equipment is repaired, the diaphragm sealing disc 7 is removed, and a small lip is removed.
  • the height of the lip of 4 mm can be provided by removing the lip height of 4 mm each time.
  • the lip seal sealing structure of the box has a service life of 24 years, more than the bundle The service life is comparable to the service life of the heat exchanger housing.
  • the third embodiment of the tube-and-tube heat exchanger tube sealing structure of the present application is the same as that of the second embodiment.
  • the features that are not explained in the embodiment are as follows. The explanation is not repeated here.
  • the difference between this embodiment and the embodiment 2 is that the angle between the protruding direction of the lip and the axial direction of the tube barrel section is set to 0°, and the pad is provided.
  • the lip is an axial lip; the angle between the convex direction of the box lip and the axial direction of the tube barrel section is set to 0°, the box lip is the axial box lip 12; the end of the tube barrel section
  • the portion is tightly sealed to the flat bezel ring 72 by the axial box lip 12 and the axial lip.
  • the single corner joint welding of the original tube end 5 and the flat edge ring 72 is changed to the axial lip welding of the two, which not only facilitates the welding and dismounting operation, but also avoids the direct welding pair.
  • the damage of the end portion 5 of the pipe box and the flat edge ring 72 at the same time, can be repeatedly welded due to the lip, which improves the utilization rate and effectively prolongs the service life.
  • the box lip and the lip are provided with a suitable height or length. Each time the equipment is repaired, the diaphragm sealing disc 7 is removed, and a small lip is removed.
  • the height of the lip of 4 mm can be provided by removing the lip height of 4 mm each time.
  • the lip seal sealing structure of the box has a service life of 24 years, more than the bundle The service life is comparable to the service life of the heat exchanger housing.
  • the axial pad lip extends along a plane flush with the outer peripheral surface of the flat pad side ring 72 to form an integrated unitary structure, and the axial box lip 12 and the end portion of the tube barrel barrel are formed.
  • the arrangement is connected between the two by the angular welding 13 and then welded to the axial pad by the axial lip welding 14.
  • the end of the tube barrel section is provided with a sealing stop step, and the height of the flat pad side ring 72 in the radial direction of the tube box is superimposed with the height of the axial box lip 12 in the radial direction of the tube box, and is disposed exactly at the end of the tube tube barrel section.
  • the protruding box lip provided on the circular surface of the end of the tube box end seal sealing step is a combined structure with the end portion of the tube box 5, and the materials of the two can be different, and the high strength material of the tube box tube section is favorable for Withstand high pressure, the strength of the box lip material is more conducive to welding. After repeated inspection and disassembly, the protruding box lip is exhausted, and a ring of the box lip can be re-made and continue to be used.
  • the end of the tube barrel section is provided with a sealing end step, and the axial box lip 12 is protruded in the axial direction of the tube box along the axial direction parallel to the tube box to form an integrated shaft.
  • the axial pad lip extends along a plane flush with the outer peripheral surface of the flat pad side ring 72 to form an integrated unitary structure, and the integrated axial box lip 12 and the integrated axial pad lip are on the outer end surface.
  • the step abuts, wherein the length of the axial box lip 12 in the axial direction of the tube box is less than the sum of the length of the flat pad side ring 72 in the axial direction of the tube box and the length of the axial pad lip along the axial direction of the tube box.
  • the convex box lip provided on the circular surface of the end of the tube barrel joint end seal step adopts the integral structure of the tube box tube joint. After repeated inspection and disassembly, the integrated box lip is exhausted, and a ring of lip can be re-made and continue to be used.
  • the end of the tube barrel section is provided with a sealing stop step
  • the transition surface of the step is an inclined surface instead of a plane
  • the axial box lip 12 is not abutting and is welded at the sealing step stop.
  • the inner side of the stud nut 10 which is moved outward in the radial direction of the pipe box to the outer circle, is welded to the end of the pipe barrel section, and the axial pad lip 11 of the flat pad side ring 72 is correspondingly extended, and
  • the outwardly displaced axial box lip 12 of the end of the tube barrel section is axially lip welded 14 for sealing purposes.
  • the fourth embodiment of the tube-and-tube heat exchanger tube sealing structure of the present application is the same as that of the second embodiment, and the unexplained features in the embodiment are as in the second embodiment. The explanation is not repeated here.
  • the difference between this embodiment and Embodiment 2 is that the angle between the protruding direction of the lip and the axial direction of the tube barrel section is set to 90°, and the lip is a radial lip.
  • the radial pad lip 17 is welded to the flat pad ring 72; the angle between the box lip protruding direction and the axial direction of the tube barrel section is set to 90, and the box lip is a radial box a lip 18, the radial box lip 18 is welded to the end of the tube barrel section; the end of the tube barrel section is connected to the set of welded radial flanges 18 and the set of welded joints
  • the radial lip 17 is in a tight sealing connection with the flat lip ring 72.
  • the above-mentioned group-welded radial box lip 18 and the group-welded radial pad lip 17 may also be of a one-piece construction. For example, referring to FIG.
  • the intermediate diaphragm 71, the flat pad ring 72 and the radial pad lip 17 are of a one-piece structure, that is, the three are integrally formed into the diaphragm sealing disk 7, and at this time, the diaphragm sealing disk 7 is along The height of the tube box in the radial direction is lower than the height of the radial box lip 18.
  • the single corner joint welding of the original tube end 5 and the flat rim ring 72 is changed to the radial lip welding of the two, which not only facilitates the welding and dismounting operation, but also avoids the direct welding pair.
  • the damage of the end portion 5 of the pipe box and the flat edge ring 72 can be repeatedly welded due to the lip, which improves the utilization rate and effectively prolongs the service life.
  • the box lip and the lip are provided with a suitable height or length. Each time the equipment is repaired, a small lip is removed when the diaphragm sealing disc is removed. For each attachment and removal to remove the 4 mm lip height, a lip height of 20 mm can be provided.
  • the main technical solution of the embodiment is the same as that of the embodiment 2, and the features not explained in the embodiment are used in the embodiment 2. The explanation is not repeated here.
  • the difference between this embodiment and Embodiment 2 is that the angle between the protruding direction of the lip and the axial direction of the tube barrel section is set to be greater than 0° and less than 90°.
  • a tilting lip 19 an angle between the convex direction of the box lip and the axial direction of the tube barrel section is set to be greater than 0° and less than 90°, the box lip is a tilting box lip 20; The ends of the segments are tightly sealed to the flat pad ring 72 by the tilting box lip 20 and the tilting lip 19.
  • the end of the pipe barrel section is provided with a sealing stop step
  • the transition surface of the step is an inclined surface instead of a plane
  • the direction of the transition surface of the step is the same as the inclined direction of the inclined surface of the inclined pad lip 19 and the inclined box lip 20, inclined
  • the box lip 20 and the tilting lip 19 are superimposed and abut the top lip weld 16 to achieve a tight sealing connection.
  • the single corner joint welding of the original pipe end portion 5 and the flat bead ring is changed to the inclined lip welding with the inclination of 0° to 90°, which not only facilitates the welding and dismounting operation, but also avoids
  • the direct welding damages the end of the pipe box 5 and the flat bead ring, and the lip can be repeatedly welded, which improves the utilization rate and effectively prolongs the service life.
  • the box lip and the lip are provided with a suitable height or length. Each time the equipment is repaired, the diaphragm sealing disc 7 is removed, and a small lip is removed.
  • the height of the lip of 4 mm can be provided by removing the lip height of 4 mm each time.
  • the lip seal sealing structure of the box has a service life of 24 years, more than the bundle The service life is comparable to the service life of the heat exchanger housing.
  • the sixth embodiment of the tube-and-tube heat exchanger tube-box sealing structure of the present application is the same as that of the second embodiment, and the features that are not explained in the embodiment are used in the embodiment 2. The explanation is not repeated here.
  • the difference between this embodiment and Embodiment 2 is that the angle between the convex direction of the box lip and the axial direction of the tube barrel section is set to 0°, and the box lip is an axial box lip.
  • an angle between the protruding direction of the lip and the axial direction of the tube barrel section is set to be greater than 0° and less than 90°, the lip is a tilting lip 19; the end of the tube barrel section
  • the axial box lip 12 and the inclined lip 19 are tightly sealed to the flat bezel ring 72.
  • the intermediate diaphragm 71, the flat pad side ring 72 and the inclined pad lip 19 are all of a unitary structure, that is, the three are integrally formed into the diaphragm sealing disk 7.
  • the end of the tube barrel section is not provided with a sealing stop step, and only needs to be double sealed with the sealing groove and the O-ring 8.
  • the single corner welding of the original tube end 5 and the flat edge ring 72 is changed to the welding of the axial box lip 12 and the inclined lip 19, which not only facilitates the welding and dismounting operation, but also avoids The direct welding damages the tube end 5 and the flat edge ring 72, and at the same time, the lip can be repeatedly welded, the utilization rate is improved, and the service life is effectively extended.
  • the box lip and the lip are provided with a suitable height or length. Each time the equipment is repaired, the diaphragm sealing disc 7 is removed, and a small lip is removed. When removing and removing 4mm lip height, setting a lip height of 20mm can provide 5 inspection losses, plus the last lipless welding, there are 6 inspections.
  • the normal operation of the heat exchanger is 4 years of overhaul, then the tube box
  • the lip weld seal structure has a service life of 24 years, which exceeds the service life of the tube bundle and is comparable to the service life of the heat exchanger housing.
  • a seventh embodiment of a tubular heat exchanger tube seal structure of the present application includes a diaphragm seal disposed between the end of the tube barrel section and the tube end cap 6
  • the disc 7, the diaphragm sealing disc 7 includes a diaphragm 71 disposed in the middle and a flat bezel 72 disposed along the outer peripheral side of the diaphragm 71.
  • the flat bezel 72 is under the action of the stud nut 10, and an end face clip Close to the end of the tube barrel section, the other end surface is clamped to the tube box end cover 6.
  • the improvement of the present application is that the flat bezel 6 is provided with a raised lip, the end of which is tightly sealed to the flat bezel 72 by the lip.
  • the flat pad side ring 72 is not directly sealed to the end of the tube barrel section, but is hermetically welded 9 to the end of the tube barrel section by its raised lip.
  • the direct welding of the original pipe end 5 and the flat edge ring 72 is changed to the protruding lip and the end of the pipe barrel joint is welded, thereby avoiding direct welding to the pipe end 5
  • the flat edge ring 72 is damaged, and the lip can be repeatedly used repeatedly, which improves the utilization rate.
  • the tubular heat exchanger tube box sealing structure integrates various structural advantages, and the design technology is simple and mature, and the sealing performance is improved. Good, simple structure, short manufacturing cycle and low cost can further improve the assembly quality of the pipe box.
  • the pad lip is provided with a suitable height or length. Each time the device is repaired, the diaphragm sealing plate 7 is removed, a small lip is removed, and each time the armor is removed to remove the 4 mm lip height, the 20 mm lip height can be provided for 5 times.
  • the eighth embodiment of the tube-and-tube heat exchanger tube-box sealing structure of the present application is the same as that of the seventh embodiment, and the unexplained features in the embodiment are in the seventh embodiment. The explanation is not repeated here.
  • the difference between this embodiment and the embodiment 7 is that the lip protrudes in the radial direction of the tube box, and the angle between the protruding direction and the axial direction of the tube barrel section is set to 90°.
  • the lip is a radial pad lip 17; the end of the tube barrel section is provided with a sealing stop step, and the flat pad side ring 72 passes through the radial pad lip 17 and the end of the tube barrel section Seal weld 9 achieves a tight seal connection.
  • the flat pad side ring 72 is not directly sealed to the end of the tube barrel section, but is welded to the end of the tube barrel section by its radially projecting radial lip 17 .
  • the main technical solution of the embodiment is the same as that of the embodiment 7, and in the embodiment, the unexplained features are used in the embodiment 7. The explanation is not repeated here.
  • the difference between the embodiment and the embodiment 7 is that the flat pad ring 72 is provided with a protruding lip and the flat pad ring. 72 is an integrated structure, or the convex pad lip provided by the flat pad ring 72 and the flat pad side ring 72 are a split welding assembly structure.
  • the protruding lip is formed as a unitary structure integrated with the flat bezel 72.
  • the integrated pad lip is exhausted, and a ring of lip pads can be re-made and welded to continue use.
  • the combined structure of the raised lip and the flat bezel 72 can be made of different materials.
  • the structure near the tube barrel section is made of high-strength material to withstand high pressure, while the rest of the material and the diaphragm sealing disc are used. The strength of 7 is more suitable for welding.
  • the protruding lip is exhausted, and a ring of lip pads can be re-made and welded to continue use.
  • a tenth embodiment of a tubular heat exchanger tube box sealing structure of the present application includes a diaphragm seal disposed between the end of the tube barrel barrel and the tube end cap 6.
  • the disc 7, the diaphragm sealing disc 7 includes a diaphragm 71 disposed in the middle and a flat bezel 72 disposed along the outer peripheral side of the diaphragm 71.
  • the flat bezel 72 is under the action of the stud nut 10, and an end face clip Close to the end of the tube barrel section, the other end surface is clamped to the tube box end cover 6.
  • the improvement of the present application is that the end of the tube barrel section is provided with a protruding box lip, the end of which is tightly sealed to the diaphragm sealing disk 7 by the box lip.
  • the end of the tube barrel section is not directly sealed to the flat pad ring 72, but is hermetically welded 9 by the raised box lip and the flat pad ring 72 of the diaphragm sealing disk 7.
  • the direct welding of the original pipe end 5 and the flat bezel 72 is changed to the welding of the convex box lip and the flat bezel, thereby avoiding direct welding to the end 5 of the pipe box and the side of the pipe
  • the damage of the ring, and the lip can be used repeatedly and repeatedly, which improves the utilization rate.
  • the tubular tube heat exchanger tube box sealing structure integrates various structural advantages, and the design technology is simple and mature, the sealing performance is good, and the structure is simple.
  • the manufacturing cycle is short and the cost is low, which can further improve the assembly quality of the pipe box.
  • the box lip is provided with a suitable height or length. Each time the equipment is repaired, the diaphragm sealing disc 7 is removed, a small lip is removed, and each time the armor is removed to remove the 4 mm lip height, the 20 mm lip height can be provided for 5 times.
  • the eleventh embodiment of the tube-and-tube heat exchanger tube-box sealing structure of the present application is the same as that of the embodiment 10, and the unexplained features in the embodiment are as follows. The explanations in this article are not repeated here.
  • the difference between this embodiment and the embodiment 10 is that the angle between the box lip and the axial direction of the tube box and the direction of the protrusion and the axial direction of the tube barrel section is set to 90.
  • the box lip is a radial box lip 18; the end of the tube barrel section is tightly sealed to the diaphragm sealing disk 7 by the radial box lip 18.
  • the end of the tube barrel section is not directly sealed to the flat pad ring 72, but is sealed by the radially protruding radial box lip 18 and the flat pad ring 72 of the diaphragm sealing disk 7,
  • the height of the flat pad ring 72 of the diaphragm sealing disk 7 is less than the height of the radial box lip 18 in the radial direction of the tube box.
  • the twelveth embodiment of the tube-and-tube heat exchanger tube sealing structure of the present application is the same as that of the tenth embodiment, and the unexplained features in the embodiment are as follows. The explanations in this article are not repeated here.
  • the present embodiment differs from the embodiment 10 in that the radial box lip 18 is machined with at least one step toward the side of the header end cap 6, the tube barrel section The end is tightly sealed to the diaphragm sealing disk 7 by the stepped surface of the radial box lip 18.
  • the radial box lip 18 is welded in the end of the tube barrel section, and the radial box lip 18 is disposed inwardly, and the outer side surface is flush with the outer side surface of the end of the tube barrel barrel section, and does not exceed the The outer side of the end portion eliminates the welding stress.
  • three steps are machined on the radially moving radial box lip 18, and the diaphragm pad is mounted on the maximum diameter stop step as shown in FIG.
  • the box lip 18 is sealed to the sealing edge ring 9 and finally the tube box end cap 6 is mounted.
  • the largest diameter step will be damaged when the diaphragm pad is cut off.
  • the diaphragm pad is first mounted to the smallest diameter rather than the largest diameter step, the radially displaced radial lip 18 is sealed to the sealing collar 9 and finally the tube end cap 6 is mounted.
  • the diaphragm pad is cut together with the step having the smallest diameter, and a diaphragm pad having a larger diameter is attached to the second nozzle step having a slightly larger diameter to perform the sealing welding 9.
  • the above process is repeated when a second entry into the box is required.
  • the thirteenth embodiment of the tube-and-tube heat exchanger tube-box sealing structure of the present application is the same as that of the embodiment 10, and the unexplained features in the embodiment are as follows. The explanations in this article are not repeated here.
  • the difference between the embodiment and the embodiment 10 is that the end portion of the tube barrel section is provided with an integral structure in which the protruding box lip and the end of the tube box barrel are integrally arranged.
  • the end of the tube barrel section is provided with a protruding box lip and an end of the tube box barrel section being a split type welding assembly structure.
  • the protruding box lip adopts an integral structure integrated with the end of the tube barrel section.
  • the integrated box lip is exhausted, and a ring of lip can be re-made and continue to be used.
  • the combined structure of the protruding box lip and the end of the tube barrel section can be different.
  • the material of the tube barrel is made of high-strength material to withstand high pressure, and the strength of the box lip material is more favorable. welding.
  • the protruding box lip is exhausted, and a ring of the box lip can be re-made and continue to be used.

Abstract

一种列管式换热器管箱密封结构，管箱筒节的端部（5）设有凸出的箱唇,平垫边环（72）设有凸出的垫唇，管箱筒节的端部（5）通过箱唇和垫唇与隔膜密封盘（7）紧密封连接；或者，平垫边环（72）设有凸出的垫唇，管箱筒节的端部（5）通过垫唇与平垫边环（72）紧密封连接；或者，管箱筒节的端部（5）设有凸出的箱唇,管箱筒节的端部（5）通过箱唇与隔膜密封盘（7）密封连接。该密封结构避免了直接焊接对管箱筒节的端部和平垫边环的损伤。

Description

一种列管式换热器管箱密封结构 技术领域
本申请涉及装备工程中的列管式换热器管箱的密封技术，特别是涉及用于石油炼制与化工、煤化工、化肥工业、空调、空冷、电力设施的热交换节能设备专用的一种列管式换热器管箱密封结构。
背景技术
现有技术中，列管式换热器是应用最为广泛的一种热交换器，广泛应用于化工、石油、医药、食品、轻工、冶金、焦化等领域中的“液——液”、“汽——汽”、“汽——液”热交换的对流传热，以及蒸汽冷凝和液体蒸发传热等换热冷凝流程。
现有技术中的列管式换热器通常的结构如图1所示，一般是由管束2、管壳3、管箱4等主要构件组成，其中，管束2是列管式换热器的核心构件，管束2通常由换热管1、支持板(或者折流板)和管板组成，成排的换热管1通过支持板(或者折流板)支承，其两端穿进管板的管孔中，并与管板相连接，从而保证接头的密封性和强度。通过管束2与管箱4的隔板的组合，可以将换热管1分成几个流程，以便介质在换热管1内来回流动，从而能够延长换热流程，增加换热时间，充分地与管外的壳程介质换热。上述管板与管壳3和管箱4等通过焊接或者法兰螺栓加垫片的强制密封固定装配即得一台列管式换热器。
当换热管1管内的热交换介质为冷介质，管外的热交换介质为强制对流的烟气时，则构成加热炉方式；当换热管1管内的热交换介质为热介质，管外的热交换介质为强制对流的空气时，则构成冷却器方式；加热炉方式和冷却器方式均为热交换器的一种热交换方式。这种列管式换热器的制造工艺较为成熟，安全性能也较高，是换热设备中关键的能耗设备。
上述现有技术中的列管式换热器，为了避免流程物料的泄漏，其进出口接管即便口径很小，通常设计成与管线直接对焊的方式，而不采用法兰连接的方式；同样，为了避免流程物料的泄漏，大口径的管板与其两侧的管壳和管箱圆筒体进行焊接，这样使得，管箱的端部就不能与端盖之间也采用等强度焊缝焊接的方式，主要考虑到方便检修人员能从管箱的端部进去进行检测管头等修理工作。
随之，人们一直致力于管箱的端部与管箱的端盖之间除了不可拆的强度焊接连接之外的更好的密封结构的研究。
虽然人们在上述密封结构的研究中做了长期的努力，形成了例如：T形槽金属垫法兰密封结构、薄壁Ω环结构的密封焊法兰密封结构、螺纹锁紧环密封结构等传统强制密封结构；也形成了例如：B形环、C形环、O形环、楔形环、卡扎里密封、Bridgman密封等自紧密封结构。上述密封 结构因强化效果还不够，特别是随着实践应用的深入，人们发现这些结构本身也存在一些不利的地方。主要存在的问题是：
第一，结构复杂。螺纹锁紧环换热器管箱密封，其中所采用的压紧板、密封板和螺栓均是易损件；当密封出现泄漏时，需要人工上紧螺栓进行调节补偿，带压带温操作，使得操作麻烦又不安全。
第二，需要高水平的焊接。如薄壁Ω环结构的密封焊，现场检修时很可能要重新更换Ω半环构件并全位置密封焊。如果管箱端部采用球面隔隔膜密封，现场检修不但需要去除密封焊封，重新组装后还需要重新全位置密封焊，焊工资质和工艺评定需符合国家法规标准的要求。
第三，结构庞大。如普通大法兰型密封，法兰和端盖很厚，且无温度补偿调节。
第四，结构常开裂，不安全，维护困难。
于是，申请人针对上述缺陷研发了一种能够提高管箱的组装质量，结构简单、密封性能好，同时还能够降低整体制造成本的列管式换热器管箱的密封结构，该密封结构包括有管箱筒节、管箱端盖、设置于管箱筒节的端部与管箱端盖之间的球面膜密封盘，球面膜密封盘包括有设置于中间的球面膜片和沿球面膜片的外周侧设置的平垫边环，管箱筒节的端部与管箱端盖通过螺柱螺母固定连接，平垫边环在螺柱螺母的作用下，其一端面夹紧于管箱筒节的端部，其另一端面夹紧于管箱端盖，其中，管箱筒节沿管箱筒节的端面向内设置有止口台阶，止口台阶包括第一台阶面和与第一台阶面相连的第二台阶面，第二台阶面垂直于所述管箱筒节的中心轴线，止口台阶的第一台阶面与平垫边环的外周侧之间形成第一密封环槽，止口台阶的第二台阶面向内设置有第二密封环槽，第二密封环槽的槽口夹紧于平垫边环的内端面，第一密封环槽和第二密封环槽内均设置有具有弹性的金属密封环。采用具有弹性的金属密封环与密封环槽相配合进行双重密封，两个具有弹性的金属密封环可以同时与其对应的密封环槽的槽壁共同作用以产生微量胀紧变形来进一步夹紧密封，两者之间相互协同作用，不存在相互干涉影响及密封力的抵消现象，具有互相补偿的功能；然而，上述结构中的密封环槽的加工较为复杂，制造成本较高，制造周期较长，而且单纯密封环槽与金属密封环的密封为动密封，需要至少两个密封环槽搭配至少两个具有弹性的金属密封环才能实现较好的密封效果。
进一步，申请人试图采用将管箱筒节的端部与平垫边环两者之间直接焊接以实现紧密封连接，然而发现直接焊接对于管箱端部和平垫边环的损伤较大，使得密封膜盘的使用寿命较短，再加上管箱端部的修复，不便于实际使用中的检修和使用。
综上，申请人再次结合隔膜密封技术与列管式换热器管箱端部存在的问题进行改进，研发一种改进的管箱端部密封结构，在工程技术领域具有极为深远和重大的意义。
申请内容
本申请的目的在于避免现有技术中的不足之处而提供一种能够避免直接焊接带来的管箱端部 和平垫边环的损伤，可反复多次使用、利用率高，同时结构简单、制造周期短、成本低、密封性能好、进一步提高管箱的组装质量的列管式换热器管箱的唇焊密封结构。
本申请的目的通过以下技术方案实现：
提供了一种列管式换热器管箱密封结构，包括有设置于管箱筒节的端部与管箱端盖之间的隔膜密封盘，隔膜密封盘包括有设置于中间的膜片和沿膜片的外周侧设置的平垫边环，平垫边环在螺柱螺母的作用下，其一端面夹紧于管箱筒节的端部，其另一端面夹紧于管箱端盖，其中，所述管箱筒节的端部设置有凸出的箱唇,所述平垫边环设置有凸出的垫唇，所述管箱筒节的端部通过所述箱唇和所述垫唇与所述隔膜密封盘紧密封连接。
优选的，所述平垫边环设置的凸出的垫唇、该垫唇凸出方向与管箱筒节的轴向之间的夹角设置为大于等于0°且小于等于90°；所述管箱筒节的端部设置的凸出的箱唇、该箱唇凸出方向与管箱筒节的轴向之间的夹角设置为大于等于0°且小于等于90°。
更优选的，所述垫唇凸出方向与管箱筒节的轴向之间的夹角设置为0°，该垫唇为轴向垫唇；所述箱唇凸出方向与管箱筒节的轴向之间的夹角设置为0°，该箱唇为轴向箱唇；所述管箱筒节的端部通过所述轴向箱唇和所述轴向垫唇与所述平垫边环紧密封连接。
更优选的，所述垫唇凸出方向与管箱筒节的轴向之间的夹角设置为90°，该垫唇为径向垫唇；所述箱唇凸出方向与管箱筒节的轴向之间的夹角设置为90°，该箱唇为径向箱唇；所述管箱筒节的端部通过所述径向箱唇和所述径向垫唇与所述平垫边环紧密封连接。
更优选的，所述垫唇凸出方向与管箱筒节的轴向之间的夹角设置为大于0°且小于90°，该垫唇为倾斜垫唇；所述箱唇凸出方向与管箱筒节的轴向之间的夹角设置为大于0°且小于90°，该箱唇为倾斜箱唇；所述管箱筒节的端部通过所述倾斜箱唇和所述倾斜垫唇与所述平垫边环紧密封连接。
更优选的，所述箱唇凸出方向与管箱筒节的轴向之间的夹角设置为0°，该箱唇为轴向箱唇；所述垫唇凸出方向与管箱筒节的轴向之间的夹角设置为大于0°且小于90°，该垫唇为倾斜垫唇；所述管箱筒节的端部通过所述轴向箱唇和所述倾斜垫唇与所述平垫边环紧密封连接。
上述的，所述箱唇设置于所述管箱筒节的端部的密封止口台阶。
上述的，所述平垫边环设置的凸出的垫唇与所述平垫边环为一体化设置的整体结构，或者所述平垫边环设置的凸出的垫唇与所述平垫边环为分体式的组焊组合结构。
上述的，所述管箱筒节的端部设置有凸出的箱唇与所述管箱筒节的端部为一体化设置的整体结构，或者所述管箱筒节的端部设置有凸出的箱唇与所述管箱筒节的端部为分体式的组焊组合结构。
又提供了一种列管式换热器管箱密封结构，包括有设置于管箱筒节的端部与管箱端盖之间的隔膜密封盘，隔膜密封盘包括有设置于中间的膜片和沿膜片的外周侧设置的平垫边环，平垫边环在 螺柱螺母的作用下，其一端面夹紧于管箱筒节的端部，其另一端面夹紧于管箱端盖，其中，所述平垫边环设置有凸出的垫唇，所述管箱筒节的端部通过所述垫唇与所述隔膜密封盘紧密封连接。
优选的，所述垫唇凸出方向与管箱筒节的轴向之间的夹角设置为90°，该垫唇为径向垫唇；所述管箱筒节的端部通过所述径向垫唇与所述平垫边环紧密封连接。
优选的，所述平垫边环设置的凸出的垫唇与所述平垫边环为一体化设置的整体结构，或者所述平垫边环设置的凸出的垫唇与所述平垫边环为分体式的组焊组合结构。
还提供了一种列管式换热器管箱密封结构，包括有设置于管箱筒节的端部与管箱端盖之间的隔膜密封盘，隔膜密封盘包括有设置于中间的膜片和沿膜片的外周侧设置的平垫边环，平垫边环在螺柱螺母的作用下，其一端面夹紧于管箱筒节的端部，其另一端面夹紧于管箱端盖，其中，所述管箱筒节的端部设置有凸出的箱唇,所述管箱筒节的端部通过所述箱唇与所述隔膜密封盘紧密封连接。
优选的，所述箱唇凸出方向与管箱筒节的轴向之间的夹角设置为90°，该箱唇为径向箱唇；所述管箱筒节的端部通过所述径向箱唇与所述隔膜密封盘紧密封连接。
更优选的，所述径向箱唇朝向所述管箱端盖的一侧加工有至少一个台阶，所述管箱筒节的端部通过所述径向箱唇的台阶面与所述隔膜密封盘紧密封连接。
优选的，所述管箱筒节的端部设置有凸出的箱唇与所述管箱筒节的端部为一体化设置的整体结构，或者所述管箱筒节的端部设置有凸出的箱唇与所述管箱筒节的端部为分体式的组焊组合结构。
本申请的有益效果：
本申请的一种列管式换热器管箱密封结构，包括三种技术方案，其一为，所述管箱筒节的端部设置有凸出的箱唇,所述平垫边环设置有凸出的垫唇，所述管箱筒节的端部通过所述箱唇和所述垫唇与所述隔膜密封盘紧密封连接；其二为，所述平垫边环设置有凸出的垫唇，所述管箱筒节的端部通过所述垫唇与所述平垫边环紧密封连接；其三为，所述管箱筒节的端部设置有凸出的箱唇,所述管箱筒节的端部通过所述箱唇与所述隔膜密封盘紧密封连接。与现有技术相比，把原来管箱端部和平垫边环的直接焊接改为箱唇和/或垫唇的凸唇的焊接，避免了直接焊接对管箱端部和平垫边环的损伤，而且凸唇可反复多次使用，提高了利用率，同时该列管式换热器管箱密封结构集多种结构优点于一体，其设计技术简便成熟、密封性能好、结构简单、制造周期短、成本低，可进一步提高管箱的组装质量。箱唇和垫唇设置有合适的高度或长度，每一次设备检修需拆下隔膜密封盘时就会去除一小段唇，按每次装拆去除4mm唇高，则设置20mm的唇高可以提供5次检修损耗，加上最后一次无唇组焊，共有6次检修，正常运行的换热器是4年一次检修，则管箱的唇焊密封结构则有24年的使用寿命，超过管束一般的使用寿命，并与换热器壳体的使用寿命相当。
附图说明
利用附图对本申请作进一步说明，但附图中的实施例不构成对本申请的任何限制，对于本领域的普通技术人员，在不付出创造性劳动的前提下，还可以根据以下附图获得其它的附图。
图1是现有技术中的一种列管式换热器的结构示意图。
图2是本申请的一种列管式换热器管箱密封结构的其中一种局部结构示意图。
图3是本申请的一种列管式换热器管箱密封结构的其中一种局部结构示意图。
图4是本申请的一种列管式换热器管箱密封结构的其中一种局部结构示意图。
图5是本申请的一种列管式换热器管箱密封结构的其中一种局部结构示意图。
图6是本申请的一种列管式换热器管箱密封结构的其中一种局部结构示意图。
图7是本申请的一种列管式换热器管箱密封结构的其中一种局部结构示意图。
图8是本申请的一种列管式换热器管箱密封结构的其中一种局部结构示意图。
图9是本申请的一种列管式换热器管箱密封结构的其中一种局部结构示意图。
图10是本申请的一种列管式换热器管箱密封结构的其中一种局部结构示意图。
图11是本申请的一种列管式换热器管箱密封结构的其中一种局部结构示意图。
在图1至图11中包括有：
1——换热管、2——管束、3——管壳、4——管箱、
5——管箱端部、6——端盖、
7——隔膜密封盘、71——膜片、72——平垫边环、
8——O形环、9——密封焊、10——螺柱螺母、
11——轴向垫唇、12——轴向箱唇、
13——角焊接、14——轴向唇焊、15——径向唇焊、16——倾斜唇焊、
17——径向垫唇、18——径向箱唇、
19——倾斜垫唇、20——倾斜箱唇。
具体实施方式
结合以下实施例对本申请作进一步详细描述。
实施例1
本申请的一种列管式换热器管箱密封结构的具体实施方式之一，参考图2至图7所示，包括有设置于管箱筒节的端部与管箱端盖6之间的隔膜密封盘7，隔膜密封盘7包括有设置于中间的膜片71和沿膜片71的外周侧设置的平垫边环72，平垫边环72在螺柱螺母10的作用下，其一端面夹紧于管箱筒节的端部，其另一端面夹紧于管箱端盖6，上述技术特征与现有技术中的列管式换热器管箱的密封结构相同，且本申请的一种列管式换热器管箱密封结构也具备现有技术中的列管式换热器管箱密封结构的其它基本结构。
本申请的改进之处在于：所述管箱筒节的端部设置有凸出的箱唇,所述平垫边环72设置有凸 出的垫唇，所述管箱筒节的端部通过所述箱唇和所述垫唇与所述隔膜密封盘7紧密封连接。与现有技术相比，把原来管箱端部5和平垫边环72的直接焊接改为箱唇和垫唇的凸唇的焊接，不仅方便了焊接和拆卸操作，而且还避免了直接焊接对管箱端部5和平垫边环72的损伤，同时由于凸唇可反复多次焊接，提高了利用率，有效的延长了其使用寿命。箱唇和垫唇设置有合适的高度或长度，每一次设备检修需拆下隔膜密封盘7时就会去除一小段唇，按每次装拆去除4mm唇高，则设置20mm的唇高可以提供5次检修损耗，加上最后一次无唇组焊，共有6次检修，正常运行的换热器是4年一次检修，则管箱的唇焊密封结构则有24年的使用寿命，超过管束一般的使用寿命，并与换热器壳体的使用寿命相当。
具体的，所述平垫边环72设置的凸出的垫唇与所述平垫边环72为一体化设置的整体结构，或者所述平垫边环72设置的凸出的垫唇与所述平垫边环72为分体式的组焊组合结构；所述管箱筒节的端部设置有凸出的箱唇与所述管箱筒节的端部为一体化设置的整体结构，或者所述管箱筒节的端部设置有凸出的箱唇与所述管箱筒节的端部为分体式的组焊组合结构。组焊组合结构可以是同种材料的直接组焊，也可以是异种材料通过过渡层材料的组焊，当两唇之一高度减少，退缩到无唇，可以在其上需密封焊9处先堆焊一层可焊性好的材料，另一唇再与堆焊层进行密封焊9。上述技术方案中，凸出的箱唇与管箱筒节的端部为一体化设置的整体结构或者分体式的组焊组合结构中的任一，与凸出的垫唇与平垫边环72为一体化设置的整体结构或者分体式的组焊组合结构中的任一紧密封连接。
具体的，所述箱唇可以设置于所述管箱筒节的端部的密封止口台阶，平垫边环72与中间的膜片71可以为不同厚度进行过渡；所述箱唇也可以不设置于所述管箱筒节的端部的密封止口台阶，则平垫边环72与中间的膜片71为等厚度过渡。
本申请具体可应用于石油炼制与化工、煤化工、化肥、空调、空冷、电力设施装备等的热交换要求上，包括给介质加热或冷却等应用方式，特别适合于高温高压临氢载荷波动的工况，也适合于类似工况的承压设备人孔。同时，根据本申请的密封技术原理，本申请的一种列管式换热器管箱密封结构可应用于平焊法兰、对焊法兰、长颈法兰、宽面法兰、窄面法兰、反向法兰和圆筒形端部、圆锥形端部、凸缘、换热器管箱、换热器管板、盲盖板等结构。
实施例2
本申请的一种列管式换热器管箱密封结构的具体实施方式之二，本实施例的主要技术方案与实施例1相同，在本实施例中未解释的特征，采用实施例1中的解释，在此不再进行赘述。参考图2至图9所示，本实施例与实施例1的区别在于，所述平垫边环72设置的凸出的垫唇、该垫唇凸出方向与管箱筒节的轴向之间的夹角设置为大于等于0°且小于等于90°；所述管箱筒节的端部设置的凸出的箱唇、该箱唇凸出方向与管箱筒节的轴向之间的夹角设置为大于等于0°且小于等于90°。
当所述平垫边环72设置的凸出的垫唇的凸出方向与管箱筒节的轴向之间的夹角等于0°时，垫唇沿平垫边环72的轴向凸出；当所述平垫边环72设置的凸出的垫唇的凸出方向与管箱筒节的轴向之间的夹角等于90°时，垫唇沿平垫边环72的径向凸出；当所述平垫边环72设置的凸出的垫唇的凸出方向与管箱筒节的轴向之间的夹角大于0°小于90°时，垫唇沿平垫边环72倾斜凸出。
当所述管箱筒节的端部设置的凸出的箱唇的凸出方向与管箱筒节的轴向之间的夹角为0°时，箱唇沿管箱轴向凸出；当所述管箱筒节的端部设置的凸出的箱唇的凸出方向与管箱筒节的轴向之间的夹角为90°时，箱唇沿管箱径向凸出；当所述管箱筒节的端部设置的凸出的箱唇的凸出方向与管箱筒节的轴向之间的夹角为大于0°小于90°时，箱唇沿管箱倾斜凸出。
与现有技术相比，把原来管箱端部5和平垫边环72单一的角接焊接改为两者径向的凸唇焊接、轴向的凸唇焊接或者倾斜0°到90°的倾斜凸唇焊接，不仅方便了焊接和拆卸操作，而且还避免了直接焊接对管箱端部5和平垫边环72的损伤，同时由于凸唇可反复多次焊接，提高了利用率，有效的延长了其使用寿命。箱唇和垫唇设置有合适的高度或长度，每一次设备检修需拆下隔膜密封盘7时就会去除一小段唇，按每次装拆去除4mm唇高，则设置20mm的唇高可以提供5次检修损耗，加上最后一次无唇组焊，共有6次检修，正常运行的换热器是4年一次检修，则管箱的唇焊密封结构则有24年的使用寿命，超过管束一般的使用寿命，并与换热器壳体的使用寿命相当。
实施例3
本申请的一种列管式换热器管箱密封结构的具体实施方式之三，本实施例的主要技术方案与实施例2相同，在本实施例中未解释的特征，采用实施例2中的解释，在此不再进行赘述。参考图2、图3和图4所示，本实施例与实施例2的区别在于，所述垫唇凸出方向与管箱筒节的轴向之间的夹角设置为0°，该垫唇为轴向垫唇；所述箱唇凸出方向与管箱筒节的轴向之间的夹角设置为0°，该箱唇为轴向箱唇12；所述管箱筒节的端部通过所述轴向箱唇12和所述轴向垫唇与所述平垫边环72紧密封连接。与现有技术相比，把原来管箱端部5和平垫边环72单一的角接焊接改为两者轴向的凸唇焊接，不仅方便了焊接和拆卸操作，而且还避免了直接焊接对管箱端部5和平垫边环72的损伤，同时由于凸唇可反复多次焊接，提高了利用率，有效的延长了其使用寿命。箱唇和垫唇设置有合适的高度或长度，每一次设备检修需拆下隔膜密封盘7时就会去除一小段唇，按每次装拆去除4mm唇高，则设置20mm的唇高可以提供5次检修损耗，加上最后一次无唇组焊，共有6次检修，正常运行的换热器是4年一次检修，则管箱的唇焊密封结构则有24年的使用寿命，超过管束一般的使用寿命，并与换热器壳体的使用寿命相当。
具体的，参考图2所示，上述轴向垫唇沿与平垫边环72的外周面平齐的平面延伸形成一体化的整体结构，轴向箱唇12与管箱筒节的端部分体式设置，两者之间通过角焊接13连接后，再通过轴向唇焊14与轴向垫唇焊接连接。管箱筒节的端部设置密封止口台阶，平垫边环72沿管箱径向的高度与轴向箱唇12沿管箱径向的高度叠加后正好与管箱筒节的端部设置的密封止口台阶抵 顶，其中轴向箱唇12沿管箱轴向的长度小于平垫边环72沿管箱轴向的长度与轴向垫唇沿管箱轴向的长度之和。管箱筒节端部密封止口台阶的圆面上设置的凸出的箱唇是与管箱端部5组焊的组合结构，两者的材料可不同，管箱筒节高强度材料有利于承受高压，箱唇材料强度合适更有利于焊接。当多次检修拆装致使凸出的箱唇耗尽后，可重新制作一圈箱唇组焊上去，继续使用。
具体的，参考图3所示，管箱筒节的端部设置密封止口台阶，上述轴向箱唇12沿与管箱轴向相平行的台阶面向管箱轴向凸出设置一体化的轴向箱唇12，上述轴向垫唇沿与平垫边环72的外周面平齐的平面延伸形成一体化的整体结构，一体化的轴向箱唇12与一体化的轴向垫唇在外端面通过轴向唇焊14密封连接，平垫边环72沿管箱径向的高度与轴向箱唇12沿管箱径向的高度叠加后正好与管箱筒节的端部设置的密封止口台阶抵顶，其中轴向箱唇12沿管箱轴向的长度小于平垫边环72沿管箱轴向的长度与轴向垫唇沿管箱轴向的长度之和。管箱筒节端部密封止口台阶的圆面上设置的凸出的箱唇采用管箱筒节一体化的整体结构。当多次检修拆装致使一体化的箱唇耗尽后，可重新制作一圈箱唇组焊上去，继续使用。
具体的，参考图4所示，管箱筒节的端部设置密封止口台阶，台阶的过渡面为倾斜面而非平面，轴向箱唇12不是抵顶并组焊在密封台阶止口处，而是沿管箱的径向外移至靠近外圆的螺柱螺母10的内侧在组焊至管箱筒节的端部，平垫边环72的轴向垫唇11也相应外延，与管箱筒节的端部的外移的轴向箱唇12进行轴向唇焊14以达到密封目的。
实施例4
本申请的一种列管式换热器管箱密封结构的具体实施方式之四，本实施例的主要技术方案与实施例2相同，在本实施例中未解释的特征，采用实施例2中的解释，在此不再进行赘述。参考图5所示，本实施例与实施例2的区别在于，所述垫唇凸出方向与管箱筒节的轴向之间的夹角设置为90°，该垫唇为径向垫唇17，径向垫唇17与平垫边环72组焊式连接；所述箱唇凸出方向与管箱筒节的轴向之间的夹角设置为90°，该箱唇为径向箱唇18，径向箱唇18与管箱筒节的端部组焊式连接；所述管箱筒节的端部通过所述组焊式连接的径向箱唇18和所述组焊式连接的径向垫唇17与所述平垫边环72径向唇焊15实现紧密封连接。当然，上述提及的组焊式的径向箱唇18和组焊式的径向垫唇17也可以均为一体式结构。例如，参考图9所示，中间的膜片71、平垫边环72与径向垫唇17均为一体式结构，即三者形成一体成为隔膜密封盘7，此时，隔膜密封盘7沿管箱径向的高度低于径向箱唇18的高度。
与现有技术相比，把原来管箱端部5和平垫边环72单一的角接焊接改为两者径向的凸唇焊接，不仅方便了焊接和拆卸操作，而且还避免了直接焊接对管箱端部5和平垫边环72的损伤，同时由于凸唇可反复多次焊接，提高了利用率，有效的延长了其使用寿命。箱唇和垫唇设置有合适的高度或长度，每一次设备检修需拆下隔膜密封盘时就会去除一小段唇，按每次装拆去除4mm唇高，则设置20mm的唇高可以提供5次检修损耗，加上最后一次无唇组焊，共有6次检修，正常运行的 换热器是4年一次检修，则管箱的唇焊密封结构则有24年的使用寿命，超过管束一般的使用寿命，并与换热器壳体的使用寿命相当。
实施例5
本申请的一种列管式换热器管箱密封结构的具体实施方式之五，本实施例的主要技术方案与实施例2相同，在本实施例中未解释的特征，采用实施例2中的解释，在此不再进行赘述。参考图6所示，本实施例与实施例2的区别在于，所述垫唇凸出方向与管箱筒节的轴向之间的夹角设置为大于0°且小于90°，该垫唇为倾斜垫唇19；所述箱唇凸出方向与管箱筒节的轴向之间的夹角设置为大于0°且小于90°，该箱唇为倾斜箱唇20；所述管箱筒节的端部通过所述倾斜箱唇20和所述倾斜垫唇19与所述平垫边环72紧密封连接。
管箱筒节的端部设置密封止口台阶，台阶的过渡面为倾斜面而非平面，且台阶的过渡面的方向与倾斜垫唇19和倾斜箱唇20的倾斜面的倾斜方向相同，倾斜箱唇20和倾斜垫唇19叠加后抵顶倾斜唇焊16以实现紧密封连接。
与现有技术相比，把原来管箱端部5和平垫边环单一的角接焊接改为两者倾斜0°到90°的倾斜凸唇焊接，不仅方便了焊接和拆卸操作，而且还避免了直接焊接对管箱端部5和平垫边环的损伤，同时由于凸唇可反复多次焊接，提高了利用率，有效的延长了其使用寿命。箱唇和垫唇设置有合适的高度或长度，每一次设备检修需拆下隔膜密封盘7时就会去除一小段唇，按每次装拆去除4mm唇高，则设置20mm的唇高可以提供5次检修损耗，加上最后一次无唇组焊，共有6次检修，正常运行的换热器是4年一次检修，则管箱的唇焊密封结构则有24年的使用寿命，超过管束一般的使用寿命，并与换热器壳体的使用寿命相当。
实施例6
本申请的一种列管式换热器管箱密封结构的具体实施方式之六，本实施例的主要技术方案与实施例2相同，在本实施例中未解释的特征，采用实施例2中的解释，在此不再进行赘述。参考图7所示，本实施例与实施例2的区别在于，所述箱唇凸出方向与管箱筒节的轴向之间的夹角设置为0°，该箱唇为轴向箱唇12；所述垫唇凸出方向与管箱筒节的轴向之间的夹角设置为大于0°且小于90°，该垫唇为倾斜垫唇19；所述管箱筒节的端部通过所述轴向箱唇12和所述倾斜垫唇19与所述平垫边环72紧密封连接。其中，中间的膜片71、平垫边环72与倾斜垫唇19均为一体式结构，即三者形成一体成为隔膜密封盘7。这里的管箱筒节的端部没有设置密封止口台阶，仅需要搭配密封槽和O形环8进行双重密封。
与现有技术相比，把原来管箱端部5和平垫边环72单一的角接焊接改为轴向箱唇12和倾斜垫唇19的焊接，不仅方便了焊接和拆卸操作，而且还避免了直接焊接对管箱端部5和平垫边环72的损伤，同时由于凸唇可反复多次焊接，提高了利用率，有效的延长了其使用寿命。箱唇和垫唇设置有合适的高度或长度，每一次设备检修需拆下隔膜密封盘7时就会去除一小段唇，按每次 装拆去除4mm唇高，则设置20mm的唇高可以提供5次检修损耗，加上最后一次无唇组焊，共有6次检修，正常运行的换热器是4年一次检修，则管箱的唇焊密封结构则有24年的使用寿命，超过管束一般的使用寿命，并与换热器壳体的使用寿命相当。
实施例7
本申请的一种列管式换热器管箱密封结构的具体实施方式之七，参考图8所示，包括有设置于管箱筒节的端部与管箱端盖6之间的隔膜密封盘7，隔膜密封盘7包括有设置于中间的膜片71和沿膜片71的外周侧设置的平垫边环72，平垫边环72在螺柱螺母10的作用下，其一端面夹紧于管箱筒节的端部，其另一端面夹紧于管箱端盖6，上述技术特征与现有技术中的列管式换热器管箱的密封结构相同，且本申请的一种列管式换热器管箱密封结构也具备现有技术中的列管式换热器管箱密封结构的其它基本结构。
本申请的改进之处在于：所述平垫边环72设置有凸出的垫唇，所述管箱筒节的端部通过所述垫唇与所述平垫边环72紧密封连接。平垫边环72没有直接与管箱筒节的端部进行密封焊9，而是通过其凸出的垫唇与管箱筒节的端部进行密封焊9。与现有技术相比，把原来管箱端部5和平垫边环72的直接焊接改为凸出的垫唇与管箱筒节的端部进行焊接，避免了直接焊接对管箱端部5和平垫边环72的损伤，而且凸唇可反复多次使用，提高了利用率，同时该列管式换热器管箱密封结构集多种结构优点于一体，其设计技术简便成熟、密封性能好、结构简单、制造周期短、成本低，可进一步提高管箱的组装质量。垫唇设置有合适的高度或长度，每一次设备检修需拆下隔膜密封盘7时就会去除一小段唇，按每次装拆去除4mm唇高，则设置20mm的唇高可以提供5次检修损耗，加上最后一次无唇组焊，共有6次检修，正常运行的换热器是4年一次检修，则管箱的唇焊密封结构则有24年的使用寿命，超过管束一般的使用寿命，并与换热器壳体的使用寿命相当。
实施例8
本申请的一种列管式换热器管箱密封结构的具体实施方式之八，本实施例的主要技术方案与实施例7相同，在本实施例中未解释的特征，采用实施例7中的解释，在此不再进行赘述。参考图8所示，本实施例与实施例7的区别在于，所述垫唇沿管箱径向凸出、且凸出方向与管箱筒节的轴向之间的夹角设置为90°，该垫唇为径向垫唇17；所述管箱筒节的端部设置有密封止口台阶，所述平垫边环72通过所述径向垫唇17与管箱筒节的端部密封焊9实现紧密封连接。平垫边环72没有直接与管箱筒节的端部进行密封焊9，而是通过其径向凸出的径向垫唇17与管箱筒节的端部进行密封焊9。
实施例9
本申请的一种列管式换热器管箱密封结构的具体实施方式之九，本实施例的主要技术方案与实施例7相同，在本实施例中未解释的特征，采用实施例7中的解释，在此不再进行赘述。参考图8所示，本实施例与实施例7的区别在于，所述平垫边环72设置的凸出的垫唇与所述平垫边环 72为一体化设置的整体结构，或者所述平垫边环72设置的凸出的垫唇与所述平垫边环72为分体式的组焊组合结构。凸出的垫唇采用与平垫边环72一体化的整体结构。当多次检修拆装致使一体化的垫唇耗尽后，可重新制作一圈垫唇组焊上去，继续使用。而凸出的垫唇与平垫边环72组焊的组合结构，两者采用的材料可不同，靠近管箱筒节的结构采用高强度材料有利于承受高压，而其余部分材料与隔膜密封盘7的强度合适更有利于焊接。当多次检修拆装致使凸出的垫唇耗尽后，可重新制作一圈垫唇组焊上去，继续使用。
实施例10
本申请的一种列管式换热器管箱密封结构的具体实施方式之十，参考图9所示，包括有设置于管箱筒节的端部与管箱端盖6之间的隔膜密封盘7，隔膜密封盘7包括有设置于中间的膜片71和沿膜片71的外周侧设置的平垫边环72，平垫边环72在螺柱螺母10的作用下，其一端面夹紧于管箱筒节的端部，其另一端面夹紧于管箱端盖6，上述技术特征与现有技术中的列管式换热器管箱的密封结构相同，且本申请的一种列管式换热器管箱密封结构也具备现有技术中的列管式换热器管箱密封结构的其它基本结构。
本申请的改进之处在于：所述管箱筒节的端部设置有凸出的箱唇,所述管箱筒节的端部通过所述箱唇与所述隔膜密封盘7紧密封连接。管箱筒节的端部没有直接与平垫边环72进行密封焊9，而是通过其凸出的箱唇与隔膜密封盘7的平垫边环72进行密封焊9。与现有技术相比，把原来管箱端部5和平垫边环72的直接焊接改为凸出的箱唇与平垫边环的焊接，避免了直接焊接对管箱端部5和平垫边环的损伤，而且凸唇可反复多次使用，提高了利用率，同时该列管式换热器管箱密封结构集多种结构优点于一体，其设计技术简便成熟、密封性能好、结构简单、制造周期短、成本低，可进一步提高管箱的组装质量。箱唇设置有合适的高度或长度，每一次设备检修需拆下隔膜密封盘7时就会去除一小段唇，按每次装拆去除4mm唇高，则设置20mm的唇高可以提供5次检修损耗，加上最后一次无唇组焊，共有6次检修，正常运行的换热器是4年一次检修，则管箱的唇焊密封结构则有24年的使用寿命，超过管束一般的使用寿命，并与换热器壳体的使用寿命相当。
实施例11
本申请的一种列管式换热器管箱密封结构的具体实施方式之十一，本实施例的主要技术方案与实施例10相同，在本实施例中未解释的特征，采用实施例10中的解释，在此不再进行赘述。参考图9所示，本实施例与实施例10的区别在于，所述箱唇沿管箱的径向凸出、其凸出方向与管箱筒节的轴向之间的夹角设置为90°，该箱唇为径向箱唇18；所述管箱筒节的端部通过所述径向箱唇18与所述隔膜密封盘7紧密封连接。管箱筒节的端部没有直接与平垫边环72进行密封焊9，而是通过其径向凸出的径向箱唇18与隔膜密封盘7的平垫边环72进行密封焊9，该隔膜密封盘7的平垫边环72的高度小于径向箱唇18沿管箱径向的高度。
实施例12
本申请的一种列管式换热器管箱密封结构的具体实施方式之十二，本实施例的主要技术方案与实施例10相同，在本实施例中未解释的特征，采用实施例10中的解释，在此不再进行赘述。参考图10和图11所示，本实施例与实施例10的区别在于，所述径向箱唇18朝向所述管箱端盖6的一侧加工有至少一个台阶，所述管箱筒节的端部通过所述径向箱唇18的台阶面与所述隔膜密封盘7紧密封连接。
具体的，在管箱筒节的端部内圆组焊径向箱唇18，该径向箱唇18内移设置，其外侧面与管箱筒节的端部的外侧面平齐，不超出该端部的外侧面，消除焊接应力热处理后在内移的径向箱唇18上加工出三个台阶，参考图10所示把隔膜垫安装到最大直径的止口台阶上，内移的径向箱唇18与密封边环密封焊9，最后在安装管箱端盖6。当需要进入管箱时，割去隔膜垫时会损坏直径最大的台阶，只要把割下来的隔膜外圆直径加工小一点，安装到直径稍小一点的第二个止口台阶上，进行密封焊9即可。以此类推，当需要第二次进入管箱时，重复上述过程，本技术方案可以一开始就明确了径向垫唇17的使用寿命，根据具体的实际情况可以灵活设置，而且节约材料、减少损耗，同时部件整齐可以作为标准件使用与推广。
或者，参考图11所示，先把隔膜垫安装到直径最小而不是直径最大的止口台阶上，内移的径向箱唇18与密封边环密封焊9，最后在安装管箱端盖6。当需要进入管箱时，连同直径最小的台阶一起割去隔膜垫，制造一个直径大一点的隔膜垫安装到直径稍大一点的第二个止口台阶上，进行密封焊9即可。以此类推，当需要第二次进入管箱时，重复上述过程。
实施例13。
本申请的一种列管式换热器管箱密封结构的具体实施方式之十三，本实施例的主要技术方案与实施例10相同，在本实施例中未解释的特征，采用实施例10中的解释，在此不再进行赘述。参考图3所示，本实施例与实施例10的区别在于，所述管箱筒节的端部设置有凸出的箱唇与所述管箱筒节的端部为一体化设置的整体结构，或者所述管箱筒节的端部设置有凸出的箱唇与所述管箱筒节的端部为分体式的组焊组合结构。凸出的箱唇采用与管箱筒节的端部一体化的整体结构。当多次检修拆装致使一体化的箱唇耗尽后，可重新制作一圈箱唇组焊上去，继续使用。而凸出的箱唇与管箱筒节的端部组焊的组合结构，两者采用的材料可不同，管箱筒节采用高强度材料有利于承受高压，而箱唇材料强度合适更有利于焊接。当多次检修拆装致使凸出的箱唇耗尽后，可重新制作一圈箱唇组焊上去，继续使用。
最后应当说明的是，以上实施例仅用以说明本申请的技术方案，而非对本申请保护范围的限制，尽管参照较佳实施例对本申请作了详细地说明，本领域的普通技术人员应当理解，可以对本申请的技术方案进行修改或者等同替换，而不脱离本申请技术方案的实质和范围。

Claims (14)

  1. 一种列管式换热器管箱密封结构，包括有设置于管箱筒节的端部与管箱端盖之间的隔膜密封盘，隔膜密封盘包括有设置于中间的膜片和沿膜片的外周侧设置的平垫边环，平垫边环在螺柱螺母的作用下，其一端面夹紧于管箱筒节的端部，其另一端面夹紧于管箱端盖，其特征在于：所述管箱筒节的端部设置有凸出的箱唇,所述平垫边环设置有凸出的垫唇，所述管箱筒节的端部通过所述箱唇和所述垫唇与所述隔膜密封盘紧密封连接。
  2. 根据权利要求1所述的一种列管式换热器管箱密封结构，其特征在于：所述平垫边环设置的凸出的垫唇、该垫唇凸出方向与管箱筒节的轴向之间的夹角设置为大于等于0°且小于等于90°；所述管箱筒节的端部设置的凸出的箱唇、该箱唇凸出方向与管箱筒节的轴向之间的夹角设置为大于等于0°且小于等于90°。
  3. 根据权利要求2所述的一种列管式换热器管箱密封结构，其特征在于：所述垫唇凸出方向与管箱筒节的轴向之间的夹角设置为0°，该垫唇为轴向垫唇；所述箱唇凸出方向与管箱筒节的轴向之间的夹角设置为0°，该箱唇为轴向箱唇；所述管箱筒节的端部通过所述轴向箱唇和所述轴向垫唇与所述平垫边环紧密封连接。
  4. 根据权利要求2所述的一种列管式换热器管箱密封结构，其特征在于：所述垫唇凸出方向与管箱筒节的轴向之间的夹角设置为90°，该垫唇为径向垫唇；所述箱唇凸出方向与管箱筒节的轴向之间的夹角设置为90°，该箱唇为径向箱唇；所述管箱筒节的端部通过所述径向箱唇和所述径向垫唇与所述平垫边环紧密封连接。
  5. 根据权利要求2所述的一种列管式换热器管箱密封结构，其特征在于：所述垫唇凸出方向与管箱筒节的轴向之间的夹角设置为大于0°且小于90°，该垫唇为倾斜垫唇；所述箱唇凸出方向与管箱筒节的轴向之间的夹角设置为大于0°且小于90°，该箱唇为倾斜箱唇；所述管箱筒节的端部通过所述倾斜箱唇和所述倾斜垫唇与所述平垫边环紧密封连接。
  6. 根据权利要求2所述的一种列管式换热器管箱密封结构，其特征在于：所述箱唇凸出方向与管箱筒节的轴向之间的夹角设置为0°，该箱唇为轴向箱唇；所述垫唇凸出方向与管箱筒节的轴向之间的夹角设置为大于0°且小于90°，该垫唇为倾斜垫唇；所述管箱筒节的端部通过所述轴向箱唇和所述倾斜垫唇与所述平垫边环紧密封连接。
  7. 根据权利要求1至6中任意一项所述的一种列管式换热器管箱密封结构，其特征在于：所述箱唇设置于所述管箱筒节的端部的密封止口台阶。
  8. 一种列管式换热器管箱密封结构，包括有设置于管箱筒节的端部与管箱端盖之间的隔膜密封盘，隔膜密封盘包括有设置于中间的膜片和沿膜片的外周侧设置的平垫边环，平垫边环在螺柱螺母的作用下，其一端面夹紧于管箱筒节的端部，其另一端面夹紧于管箱端盖，其特征在于：所述平 垫边环设置有凸出的垫唇，所述管箱筒节的端部通过所述垫唇与所述隔膜密封盘紧密封连接。
  9. 根据权利要求8所述的一种列管式换热器管箱密封结构，其特征在于：所述垫唇凸出方向与管箱筒节的轴向之间的夹角设置为90°，该垫唇为径向垫唇；所述管箱筒节的端部通过所述径向垫唇与所述平垫边环紧密封连接。
  10. 一种列管式换热器管箱密封结构，包括有设置于管箱筒节的端部与管箱端盖之间的隔膜密封盘，隔膜密封盘包括有设置于中间的膜片和沿膜片的外周侧设置的平垫边环，平垫边环在螺柱螺母的作用下，其一端面夹紧于管箱筒节的端部，其另一端面夹紧于管箱端盖，其特征在于：所述管箱筒节的端部设置有凸出的箱唇,所述管箱筒节的端部通过所述箱唇与所述隔膜密封盘紧密封连接。
  11. 根据权利要求10所述的一种列管式换热器管箱密封结构，其特征在于：所述箱唇凸出方向与管箱筒节的轴向之间的夹角设置为90°，该箱唇为径向箱唇；所述管箱筒节的端部通过所述径向箱唇与所述隔膜密封盘紧密封连接。
  12. 根据权利要求11所述的一种列管式换热器管箱密封结构，其特征在于：所述径向箱唇朝向所述管箱端盖的一侧加工有至少一个台阶，所述管箱筒节的端部通过所述径向箱唇的台阶面与所述隔膜密封盘紧密封连接。
  13. 根据权利要求1或8所述的一种列管式换热器管箱密封结构，其特征在于：所述平垫边环设置的凸出的垫唇与所述平垫边环为一体化设置的整体结构，或者所述平垫边环设置的凸出的垫唇与所述平垫边环为分体式的组焊组合结构。
  14. 根据权利要求1或10所述的一种列管式换热器管箱密封结构，其特征在于：所述管箱筒节的端部设置有凸出的箱唇与所述管箱筒节的端部为一体化设置的整体结构，或者所述管箱筒节的端部设置有凸出的箱唇与所述管箱筒节的端部为分体式的组焊组合结构。
PCT/CN2016/077457 2015-03-30 2016-03-27 一种列管式换热器管箱密封结构 WO2016155582A1 (zh)

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