CN211520047U - Sealing bag type extending pore channel between hot chambers - Google Patents

Abstract

The utility model discloses a bag-sealing type extends pore between hot chamber, revolving door includes: the rotary door plate is provided with a clamping groove at one side; the first fastening handle is used for connecting the rotating door panel to the pipe sleeve, and the rotating door panel can rotate by taking the first fastening handle as a shaft; be used for rotating suitable position at revolving door plant, carry out the second fastening hander that the adaptation was held to revolving door plant's draw-in groove, wherein: the rotating door plate is pressed on the pipe sleeve through the fastening and pressing of the first fastening rotary handle and the second fastening rotary handle, and the hot chamber on the corresponding side is kept sealed and isolated from the pore channel. The implementation of the sealing bag type extending pore canal between the hot chambers of the utility model can meet the experimental operation requirements of long fuel materials in the hot chamber with limited space; certain space can be expanded independently, the requirement for simple structure and reliable and safe operation is met.

Description

Sealing bag type extending pore channel between hot chambers

Technical Field

The utility model relates to a nuclear power nuclear fuel aftertreatment and application especially relate to a sack formula extends pore between hot chamber.

Background

The heat chamber sealing bag type transfer devices in the prior art are all transfer devices driven by a multi-layer transfer trolley through a steel wire rope or a chain wheel and driven manually or electrically. The method mainly has the following technical problems:

1. the manual driving and steel wire rope transmission structure mode is adopted, and the three-layer structure (fixing frame, getting-off and getting-on) is adopted, the getting-off slides relative to the fixing frame, and the getting-on slides relative to the getting-off. The transportation material is placed inside the getting on the bus, carries out the material transportation along with the relative operation of getting on the bus, nevertheless can't place the long fuel material of overlength completely with the dolly inside and extend to adjacent hot chamber, can't solve the not enough long fuel material operation space of hot chamber space and extend the problem.

2. An electric driving and chain wheel transmission structure mode is adopted, and the electric driving device of the transfer trolley drives the fixed frame chain wheel to rotate so as to ensure that the transfer trolley drives the material to horizontally and linearly move; the electric driving devices of the protective doors on the two sides of the transfer passage drive the protective doors on the two sides of the hot chamber to open and close. The transportation material is placed inside the dolly, carries out the material transportation along with transporting the relative operation of dolly, nevertheless can't place the long fuel material of overlength completely with the dolly inside and extend to adjacent hot chamber, can't solve the not enough long fuel material operation space of hot chamber space and extend the problem. Meanwhile, the internal equipment of the hot chamber is required to be as simple as possible and convenient to maintain aiming at the space of the hot chamber with high-intensity radiation, but the three-layer trolley chain wheel structure of the device is complex, and the whole device is driven by an electric motor, so that the economic cost and the maintenance cost are increased.

In addition, various experimental operations of long fuel materials are an important part of the hot chamber fuel experiments, including nondestructive testing, fuel cutting and the like, but the space size of the existing hot chamber is limited during design, and the experimental operation requirements of the long fuel materials cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a heat chamber sealing bag type extending pore channel which can adapt to the experimental operation requirement of long fuel materials of a heat chamber with limited space; certain space can be expanded independently, the requirement for simple structure and reliable and safe operation is met.

In order to solve the technical problem, the embodiment of the utility model provides an envelope formula extends pore between hot chamber for carry out the expansion to the limited hot chamber in space and in order to satisfy the test operation of long fuel material, a serial communication port, include: the pipe sleeves are respectively fastened on the ports at the two opposite end parts of the pore channel; the rotary door and the rotary door are respectively connected to the pipe sleeve and used for isolating and sealing the ports of the hot chamber and the pore channel; and a bag sealing assembly for transferring materials between the two hot chambers, wherein: the revolving door includes: the rotary door plate is provided with a clamping groove at one side; the first fastening handle is used for connecting the rotating door panel to the pipe sleeve, and the rotating door panel can rotate by taking the first fastening handle as a shaft; be used for rotating suitable position at revolving door plant, carry out the second fastening hander that the adaptation was held to revolving door plant's draw-in groove, wherein: the rotating door plate is pressed on the pipe sleeve through the fastening and pressing of the first fastening rotary handle and the second fastening rotary handle, and the hot chamber on the corresponding side is kept sealed and isolated from the pore channel.

Wherein, one side of the rotating door panel is provided with an extension cavity connected with the pore channel.

Wherein, the revolving door still includes: the first O-shaped sealing ring is fastened on the pipe sleeve, and the rotating door plate is pressed to move to the side and is fastened on the first O-shaped sealing ring.

Wherein, envelope subassembly includes: one end is equipped with the bag body of open end, fastens the ejecting support ring in open end position, can be equipped with between the open end of ejecting support ring and the bag body and be used for keeping the sealing washer of the relative leakproofness between envelope subassembly and the pore, wherein: the bag sealing component filled with the materials is pushed into the pore channel from the hot chamber on one side through the supporting ring capable of being ejected, and the bag sealing component filled with the materials slides out of the pore channel to the hot chamber on the other side through the pulling bag body.

Wherein, the bag body is made of impermeable flexible material, and the opening end of the bag body is provided with a curled edge capable of wrapping the sealing ring.

Wherein the bag body is made of semitransparent polyvinyl chloride PVC, and the thickness of the bag body is 015mm-0.3 mm.

The sealing ring is a PVC lip-shaped sealing ring, and the PVC lip-shaped sealing ring is sleeved into the support ring capable of being ejected after being gradually stressed to be expanded.

Wherein, the diameter of the section of the sealing ring is 3mm-5mm, and the width of the sealing ring is 6 mm.

Wherein, the bag sealing component is an integral replaceable component.

Wherein, the bag body is in a state that the bag body is expanded and blown open in the process that the bag body is pushed into the inside of the pore passage from the hot chamber at one side and slides out of the pore passage to the hot chamber at the other side.

Wherein, the revolving door includes: a first hinge secured to the sleeve, a second hinge rotatably connected to the first hinge, a third hinge rotatably connected to the second hinge, a door panel secured to the third hinge, and a tightening assembly connected to the door panel for tightening the door panel into a compressive seal with the sleeve, wherein: the first hinge, the second hinge and the third hinge are matched in structure to change the position of the door plate relative to the pipe sleeve in a rotating mode, and the door plate is tightly fastened through the screwing assembly to be horizontally and tightly pressed on a second O-shaped sealing ring arranged on the pipe sleeve in a sealing mode.

Wherein, the subassembly of screwing includes: a screw rod connected to the door plate for changing the position relative to the door plate and a bolt rod connected to the screw rod, wherein: the rotating screw rod is linked with the bolt rod on the rotating screw rod to rotate synchronously; the bottom of the screw rod is contacted with the door plate, the bolt rod is screwed into the inside of the stop block, and the door plate is horizontally sealed and tightly pressed on a second O-shaped sealing ring arranged on the pipe sleeve.

The utility model provides a bag-sealing type extension pore between hot chamber has following beneficial effect: the revolving door includes: the rotary door plate is provided with a clamping groove at one side; the first fastening handle is used for connecting the rotating door panel to the pipe sleeve, and the rotating door panel can rotate by taking the first fastening handle as a shaft; be used for rotating suitable position at revolving door plant, carry out the second fastening hander that the adaptation was held to revolving door plant's draw-in groove, wherein: the rotary door plate is tightly pressed on the pipe sleeve through the tight pressing of the first fastening rotary handle and the second fastening rotary handle, the hot chamber on the corresponding side is kept sealed and isolated from the pore channel, and the experimental operation requirements of long fuel materials in the hot chamber with limited space can be met; certain space can be expanded independently, the requirement for simple structure and reliable and safe operation is met.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic sectional view of a heat chamber with a bag-sealing type extending hole according to an embodiment of the present invention.

Fig. 2 is a left side view of the heat chamber sealing bag type extending hole according to the embodiment of the present invention.

Fig. 3 is a schematic diagram of a right-view structure of a thermal-chamber bag-sealing type extended duct according to an embodiment of the present invention.

Fig. 4 is a schematic top sectional view of a thermal chamber-sealing bag-type extended tunnel according to an embodiment of the present invention.

Fig. 5 is a schematic view of an envelope assembly for enclosing a bag-like extended tunnel between hot chambers according to an embodiment of the present invention.

Fig. 6 is a schematic top sectional view of an exemplary embodiment of the present invention with the bag-sealed extension duct extending to the left side of the hot chamber.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-6, a first embodiment of the heat chamber sealing bag type extended tunnel of the present invention is shown.

The bag-sealing type extension pore canal between the hot chambers in the embodiment is used for expanding the capacity of the hot chamber with limited space so as to meet the test operation of long fuel materials, and comprises the following steps: a pore channel 20 arranged between the two hot chambers m \ n, wherein pipe sleeves 19 are respectively fastened on the ports at the two opposite end parts of the pore channel; a rotary door T1 and a rotary door T2 connected to the pipe sleeve 19 respectively for isolating and sealing the hot chamber from the port of the duct; and a bag sealing component P for transferring materials between the two hot chambers m, n, wherein: the rotary door T1 includes: the door panel is a rotary door panel 11, and a clamping groove 15 is formed in one side of the rotary door panel 11; a first fastening handle 12 for connecting the swing door panel 11 to the pipe sleeve 19, wherein the swing door panel 11 can rotate by taking the rotating shaft of the first fastening handle 12 as an axis; a second fastening rotary handle 13 for performing adaptive clamping on the clamping groove 15 of the rotary door plate 11 when the rotary door plate 11 rotates to a proper position, wherein: the rotating door panel 11 is pressed against the pipe sleeve 19 by the tight pressing of the first fastening screw 12 and the second fastening screw 13, keeping the hot chamber m on the respective side sealed off from the duct 20.

In practice, a very thick barrier, typically concrete walls, is present between the hot cells m/n, so that the openings 20 are provided between the walls. The horizontal transfer passage between the hot chamber m and the hot chamber n mainly comprises a duct 20, a rotary door T1, a rotary door T2 and a bag sealing component P arranged in the duct 20. This device one side revolving door T1 adopts and hangs the rotatory sealing door of formula soon, and the screw thread compresses tightly sealed under satisfying the less requirement of space occupation of land, satisfies the sealed requirement of hot chamber second grade. The rotating door T2 on the other side adopts a screw pressing device circular structure, has simple structure and even stress, improves the sealing performance of the device and meets the requirement of secondary sealing of a hot chamber.

Wherein: the revolving door T1 on either side rotates to open/rotate the door T2 to open, the heat chamber m/heat chamber n on the corresponding side is communicated with the duct 20; the rotary door T1 on either side rotates to close/rotate the door T2 to rotate to close, the heat chamber m/heat chamber n on the corresponding side is sealed and isolated with the duct 20;

the bag sealing component P is used for carrying out material transfer between the two hot chambers and comprises: a bag body 24 with an opening end 241 at one end, an ejectable support ring 23 fastened at the opening end 241, and a sealing ring for maintaining the relative sealing between the envelope assembly P and the duct 20 arranged between the ejectable support ring 23 and the opening end 241 of the bag body 24, wherein: the bag sealing component P filled with materials is pushed into the pore passage 20 from the hot chamber at one side through the support ring 23 capable of being ejected, and the bag sealing component P filled with materials slides out of the pore passage to the hot chamber at the other side through the bag body 24.

In specific implementation, the position of the horizontal space of the occupied hot chamber m is small when the revolving door T1 is rotated to open or close, the revolving door panel 11 is roughly in a shape of a circular disc, the revolving door panel 11 is provided with a revolving handle 14 for enabling the revolving door panel 11 to rotate by taking the revolving shaft of the first fastening handle 12 as an axis, and one side of the revolving door panel 11 is provided with a clamping groove 15. The swing door panel 11 is connected to the pipe sleeve 19 through a rotating shaft of a first fastening screw 12, and the first fastening screw 12 has the functions of: the relative position of the rotating door panel 11 relative to the pipe sleeve 19 is changed by providing a rotating shaft and adjusting the relative position of the rotating door panel by rotation, so that the corresponding sealing function is realized.

The second fastening hander 13 functions to: the clamping groove 15 is clamped, the relative position of the clamping groove 15 is adjusted through rotation, and the first fastening rotary handle 12 is matched with the clamping groove to change the relative position of the rotary door panel 11 relative to the pipe sleeve 19, so that a corresponding sealing function is realized.

Further, one side of the swing door panel 11 is provided with an extension cavity 111 connected with the duct 20, and the swing door T1 further includes: the first O-ring 17 fastened to the pipe sleeve 19, the swing door panel is pressed to move to the side and fastened to the first O-ring 17.

It can be understood that: the material one side adopts the less sealed revolving door of suspension type T1 of occupation of space, can avoid interfering with the inside extension rack that is used for long fuel material to extend the operation of hot chamber m, and long fuel material packing is placed inside envelope subassembly P after intact, satisfies the manipulator and simply adorns and get envelope subassembly P.

Further, the swing door T2 performs door opening and closing operations by a hinge mechanism mounted on the socket 19, and opens to the rear area of the hot room n.

Wherein, revolving door T2 is the tubular structure, and the structure is retrencied, and the atress is even, can improve the leakproofness of device, satisfies the sealed requirement of hot chamber second grade. The swing door T2 includes: a first hinge 8 secured to tube sleeve 19, a second hinge 9 rotatably connected to first hinge 8, a third hinge 10 rotatably connected to second hinge 9, a door panel 4 secured to third hinge 10, and a tightening assembly connected to door panel 4 for securing door panel 4 in a pressure tight seal with tube sleeve 19, wherein: the first hinge 8, the second hinge 9 and the third hinge 10 are matched in structure, so that the position of the door panel 4 relative to the pipe sleeve 19 is changed through rotation, and the door panel 4 is tightly pressed on the second O-shaped sealing ring 6 arranged on the pipe sleeve 19 in a horizontal sealing mode through fastening of the door panel 4 by the screwing assembly.

Wherein the second O-ring 6 is fastened to the sleeve 19 by means of slotted countersunk head screws 7. The subassembly of screwing includes: a screw 2 connected to the door panel 4 for changing the position of the door panel 4 and a bolt 3 connected to the screw 2, wherein: the rotating screw rod 2 is linked with the bolt rod 3 on the rotating screw rod to synchronously rotate; the bottom of screw rod 2 and door plant 4 contact, the inside of a dog 5 of pin 3 screw in, and door plant 4 horizontal seal compresses tightly on the second O type sealing washer 6 that pipe box 19 has, so, satisfies the revolving door and opens the door and close the sealed requirement of guaranteeing the hot chamber.

Further, the bag sealing component P has the functions of: the material is transferred between the two hot chambers m, n. The length of the bag body 24 of the bag sealing component P can be determined according to the length of the transported materials, and the transported materials can transport a plurality of long fuel materials with different sizes. When the sealing rotating door T1\ rotating door T2 on the two sides of the hot chamber is opened, the bag sealing component P filled with the long fuel enters the pore passage 20 and extends into the hot chamber, and the bag sealing component P wraps the long fuel for sealing and transferring and can still ensure the 2-level sealing requirement of the hot chamber.

Pouch 24 is made of an impermeable flexible material and open end 241 of pouch 24 is provided as a bead that can encase a gasket. The function of the curled edge is to be matched and connected with the PVC lip-shaped sealing ring.

Preferably, the pouch body 24 is a translucent polyvinyl chloride PVC having a thickness of 015mm to 0.3 mm.

Furthermore, the sealing ring is a PVC lip-shaped sealing ring, and the PVC lip-shaped sealing ring is gradually stressed to be sleeved into the support ring capable of being ejected after being expanded. The PVC lip-shaped sealing ring has the following functions: maintaining the relative tightness between the envelope assembly P and the tunnel 20.

Preferably, the diameter of the section of the sealing ring is 3mm-5mm, and the width of the sealing ring is 6 mm.

It can be understood that: the envelope component P is an integral replaceable part, and one envelope component P is required to be replaced when a long fuel material is transported. In addition, the bag body 24 is in a state that the bag body expands and is blown open in the process that the bag body is pushed into the inside of the duct 20 from the hot chamber on one side and slides out of the duct 20 to the hot chamber on the other side. This state can be implemented as follows: air pressure in a side hot chamber of the transported material outlet is set to be a certain numerical value, so that the requirement for transporting the material is met, the bottom of the envelope can be expanded and blown open towards one side of the transported material outlet hot chamber, and the requirement for simply transporting the material in the interior of the envelope component P is met.

As shown in fig. 6, the operation flow of extending the long fuel material from the right side heat chamber m to the left side heat chamber n by the inter-heat chamber bag-sealed extension duct is as follows:

the right-side hot chamber manipulator rotates the first fastening rotary handle 12 anticlockwise, the second fastening rotary handle 13 loosens the rotary door plate 11, the first O-shaped sealing ring 17 is clamped through the slotted countersunk head screw 18, the rotary door plate 11 loosens to drive the horizontal right movement to loosen the first O-shaped sealing ring 17, and the rotary door plate 11 is completely loosened; after the rotating door plate 11 is completely loosened, the right-side manipulator rotates the rotating handle 14 on the rotating door plate 11 to drive the rotating door plate 11 to rotate to the stop lever 16 around the hinge point of which one end is hinged on the pipe sleeve 19, the stop lever 16 limits and fixes the rotating door plate 11, and the rotating door T1 is completely opened.

After the rotating door T1 is opened, the envelope 24 and the liftout support ring 23 are assembled into an envelope assembly P outside the hot chamber, and the manipulator holds one end of the liftout support ring 23 of the envelope assembly P and pushes the end into the pore passage 20.

The left hot chamber manipulator rotates the rotating door T2 screw rod 2 anticlockwise to drive the bolt rod 3 to rotate, and pulls the door plate 4 to move horizontally left to loosen the second O-shaped sealing ring 6, the second O-shaped sealing ring 6 is clamped through the slotted countersunk head screw 7, when the bolt rod 3 rotates left to the outside of the stop block 5, the second O-shaped sealing ring 6 is loosened, and the rotating door T2 is loosened; the left manipulator drives the second hinge 9, the rotating door T2 and the third hinge 10 to open the rotating door T2 through the rotating door T2 and the first hinge 8 which are arranged on the pipe sleeve 19;

the manipulator pushes the liftout supporting ring 23 to slide through the operating rod to meet the requirement that the bag sealing assembly P horizontally moves to the end part in the pore channel 20, the long fuel material extending support is placed in the left side hot chamber n and the right side hot chamber m, the long fuel material to be packaged is placed in the bag sealing assembly P and placed on the long fuel material extending support of the left side hot chamber and the right side hot chamber, at the moment, experimental operations such as long fuel nondestructive testing and fuel cutting are carried out, the requirements of long fuel on the operation of the hot chamber space are met, and the 2-level sealing requirements of the hot chamber are guaranteed.

When the long fuel experiment operation is completed and the extension device needs to be dismantled, the following operation procedures are carried out: a rotating handle 14 on a rotating door T1 of a right-side hot chamber manipulator drives a rotating door plate 11 to rotate to a clamping groove 15 around a hinge point with one end hinged on a pipe sleeve 19, a first fastening rotary handle 12 and a second fastening rotary handle 13 are rotated anticlockwise to press the rotating door plate 11, a first O-shaped sealing ring 17 is clamped through a slotted countersunk head screw 18, the rotating door plate 11 is pressed to drive the horizontal left movement to press the first O-shaped sealing ring 17, the first fastening rotary handle 12 and the second fastening rotary handle 13 rotate until the rotating door plate 11 is completely pressed, the rotating door T1 is closed and the 2-level sealing requirement of a hot chamber is ensured, the left-side manipulator pulls a sealing bag 24 wrapping a long fuel material with force, and the requirement that a sealing bag component P is moved out of a pore passage 20;

the left manipulator drives a second hinge 9 and a third hinge 10 to close the rotating door T2 through a first hinge 8 arranged on a pipe sleeve 19; the hot room manipulator of left side rotates screw rod 2 clockwise in order to drive the peg 3 rotatory to promote door plant 4 level left movement and compress tightly second O type sealing washer 6, and second O type sealing washer 6 is through the chucking of fluting countersunk screw 7, and 3 dextrorotations of peg 3 to the inside fender of dog 5 when revolving door T2 die, second O type sealing washer 6 has been compressed tightly, and revolving door T2 closes and guarantees the 2 grades of sealed requirements of hot room.

So far, the hot chamber space extension device extends the long fuel material in the hot chamber from the right hot chamber m to the left hot chamber n to perform one operation flow of related experiment operation, and if the next circulation operation flow is performed, a new envelope component P is needed. If the operation is performed in a batch of long fuel within a similar time, the envelope component P can be continuously used by combining the specific conditions of the operation.

Implement the utility model discloses a bag-sealing formula extends pore between hot chamber has following beneficial effect: the revolving door includes: the rotary door plate is provided with a clamping groove at one side; the first fastening handle is used for connecting the rotating door panel to the pipe sleeve, and the rotating door panel can rotate by taking the first fastening handle as a shaft; be used for rotating suitable position at revolving door plant, carry out the second fastening hander that the adaptation was held to revolving door plant's draw-in groove, wherein: the rotary door plate is tightly pressed on the pipe sleeve through the tight pressing of the first fastening rotary handle and the second fastening rotary handle, the hot chamber on the corresponding side is kept sealed and isolated from the pore channel, and the experimental operation requirements of long fuel materials in the hot chamber with limited space can be met; certain space can be expanded independently, the requirement for simple structure and reliable and safe operation is met.

Claims (12)

1. The utility model provides a sack formula extension pore between hot chamber for expand the test operation of dilatation in order to satisfy long fuel material to the limited hot chamber in space, its characterized in that includes:

the heat exchanger comprises a duct arranged between two heat chambers, wherein pipe sleeves are respectively fastened on ports at two opposite ends of the duct; the rotating door and the rotating door are respectively connected to the pipe sleeve and used for isolating and sealing the hot chamber from the port of the pore passage; and a bag sealing assembly for transferring materials between the two hot chambers, wherein: the revolving door includes:

the rotary door plate is provided with a clamping groove at one side; a first fastening handle for connecting the rotating door panel to the pipe sleeve, wherein the rotating door panel can rotate by taking the first fastening handle as a shaft;

a second fastening rotary handle for rotating the rotary door plate to a proper position and carrying out adaptive clamping on the clamping groove of the rotary door plate, wherein: and the rotating door plate is pressed on the pipe sleeve through the fastening and pressing of the first fastening rotary handle and the second fastening rotary handle, so that the hot chamber on the corresponding side is kept sealed and isolated from the hole channel.

2. The heat chamber bag-sealing type extension duct of claim 1, wherein one side of the rotating door panel is provided with an extension cavity connected with the duct.

3. The heat chamber bag-in-bag duct of claim 1, wherein said rotary door further comprises: and the rotating door plate is pressed to move towards the side and is fastened on the first O-shaped sealing ring.

4. The heat cell envelope of any of claims 1-3, wherein the envelope assembly comprises: the bag comprises a bag body with an opening end at one end and an ejection supporting ring fastened at the position of the opening end, wherein a sealing ring used for keeping the relative sealing performance between a bag sealing component and the pore passage is arranged between the ejection supporting ring and the opening end of the bag body, and the bag sealing component comprises:

pushing the bag sealing component filled with the materials into the pore channel from the hot chamber on one side through the liftout support ring, and sliding the bag sealing component filled with the materials out of the pore channel to the hot chamber on the other side by pulling the bag body.

5. The heat chamber bag-out extension as claimed in claim 4, wherein said bag body is made of an impermeable flexible material, and an open end of said bag body is configured to be able to enclose a bead of said sealing ring.

6. The heat chamber bag-in-bag duct of claim 5, wherein said bag body is a translucent polyvinyl chloride PVC having a thickness of 015mm to 0.3 mm.

7. The heat chamber-sealing bag-type extended tunnel of claim 4, wherein the sealing ring is a PVC lip-shaped sealing ring which is sleeved into the ejectable support ring after being gradually expanded by force.

8. The heat cell bag-out extension duct of claim 7, wherein said seal ring has a cross-sectional diameter of 3mm to 5mm and a width of 6 mm.

9. The heat chamber envelope of claim 4, wherein the envelope assembly is a unitary replaceable component.

10. The heat cell bag-out tunnel of claim 9, wherein the bag body is blown open by expansion as the heat cell is pushed from one side into the tunnel and out of the tunnel to the other side.

11. The heat chamber bag-in-bag duct of claim 1, wherein said pivoting door comprises:

a first hinge secured to the shroud, a second hinge rotatably connected to the first hinge, a third hinge rotatably connected to the second hinge, a door panel secured to the third hinge, and a tightening assembly connected to the door panel for tightening the door panel into a pressure tight seal with the shroud, wherein:

the first hinge, the second hinge and the third hinge are matched in structure to change the position of the door plate relative to the pipe sleeve in a rotating mode, and the door plate is tightly fastened through the screwing assembly to be horizontally and tightly pressed on a second O-shaped sealing ring of the pipe sleeve in a sealing mode.

12. The heat chamber bag-out extension duct of claim 11, wherein said tightening assembly comprises: a screw rod connected to the door plate for changing the position of the door plate and a bolt rod connected to the screw rod, wherein:

rotating the screw rod to link the bolt rod thereon to synchronously rotate; the bottom of the screw rod is in contact with the door plate, the bolt rod is screwed into the inside of a stop block, and the door plate is horizontally and tightly pressed on a second O-shaped sealing ring of the pipe sleeve in a sealing mode.

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