CN216727273U

CN216727273U - Sealing loop and hydrogen-introducing reduction device

Info

Publication number: CN216727273U
Application number: CN202122809015.0U
Authority: CN
Inventors: 周声万; 吴伟平; 何梦宇
Original assignee: Guangdong Changxin Precision Equipment Co Ltd
Current assignee: Guangdong Changxin Precision Equipment Co Ltd
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-06-14
Anticipated expiration: 2031-11-16

Abstract

The present disclosure provides a sealing loop and a hydrogen-introducing reduction device. The sealing loop comprises a quartz tube sealing sleeve, a conical tube sealing sleeve, a sealing pre-tightening gland and a perfluoro O-shaped sealing ring; the sealing cover of the quartz tube is used for being sleeved at the opening end of the quartz tube, the sealing cover of the quartz tube is provided with an external thread, the sealing pre-tightening gland is provided with a peripheral wall and an end wall, the peripheral wall is opened and is provided with an internal thread, the internal thread is used for being in threaded connection with the external thread of the sealing cover of the quartz tube, and the end wall is provided with a through hole; the conical tube sealing sleeve comprises a cylinder part and a flange part, the cylinder part is sleeved on the cylinder part and penetrates through the through hole, the flange part extends outwards from the cylinder part in the radial direction, and the flange part is clamped between the quartz tube sealing sleeve and the end wall of the sealing pre-tightening gland and completely blocks the opening end of the quartz tube; the perfluoro O-shaped sealing ring is arranged on the inner peripheral wall of the sealing sleeve of the quartz tube and is sleeved on the outer peripheral wall surface at the opening end of the quartz tube. The hydrogen-introducing reduction device comprises a sealing loop. Thereby improving sealing performance and mounting efficiency.

Description

Sealing loop and hydrogen-introducing reduction device

Technical Field

The disclosure relates to the field of sealing, in particular to a sealing loop and a hydrogen-introducing reduction device.

Background

In the hydrogen-introducing reduction apparatus, it is necessary to seal the quartz tube of the hydrogen-introducing reduction apparatus due to the toxicity of the reactants and/or the reaction products. There is a continuing effort to improve the sealing performance and efficiency of the seal installation.

SUMMERY OF THE UTILITY MODEL

In view of the problems in the background art, it is an object of the present disclosure to provide a sealing loop and a hydrogen-permeable reduction device, which can improve sealing performance and installation efficiency of the hydrogen-permeable reduction device.

Thus, in some embodiments, a sealing looper includes a quartz tube gland, a conical tube gland, a sealing preload gland, and a perfluoro O-ring seal; the quartz tube sealing sleeve is used for being sleeved at the opening end of the quartz tube, the quartz tube is sleeved with external threads in a sealing mode, the sealing pre-tightening gland is cylindrical and is provided with a peripheral wall and an end wall, the peripheral wall and the end wall are connected with each other, one end of the peripheral wall, which is far away from the end wall, in the axial direction is provided with an opening, the peripheral wall is provided with internal threads on the inner peripheral surface, the internal threads are used for being in threaded connection with the external threads of the quartz tube sealing sleeve, and the end wall is provided with a through hole; the conical tube sealing sleeve comprises a cylinder part and a flange part, the cylinder part is sleeved on the cylinder part of the conical tube extending out of the quartz tube and used for penetrating through the through hole of the sealing pre-tightening gland, the flange part extends outwards in the radial direction from one axial end of the cylinder part, and the flange part is used for clamping between the end walls of the quartz tube sealing sleeve and the sealing pre-tightening gland when the quartz tube sealing sleeve and the sealing pre-tightening gland are in threaded connection and completely plugging the opening end of the quartz tube; the perfluoro O-shaped sealing ring is arranged on the inner peripheral wall of the sealing sleeve of the quartz tube and is sleeved on the outer peripheral wall surface at the opening end of the quartz tube.

In some embodiments, the quartz tube sealing boot is convex and includes a right circular cylinder segment with the external thread of the quartz tube sealing boot disposed therein and a protruding ring portion located at an axial end of the right circular cylinder segment and protruding radially outward.

In some embodiments, the flange portion of the quartz tube sealing sleeve is axially spaced from the peripheral wall of the seal pre-tensioning gland when the threaded connection of the quartz tube sealing sleeve and the seal pre-tensioning gland clamps the flange portion of the conical tube sealing sleeve between the quartz tube sealing sleeve and the end wall of the seal pre-tensioning gland.

In some embodiments, the collar portion is provided with a plurality of grooves spaced around the circumference, each groove passing axially through the collar portion and opening radially.

In some embodiments, the outer surface of the peripheral wall of the seal pre-tensioned gland has a plurality of recesses spaced around the periphery, each recess passing axially through the peripheral wall and opening radially.

In some embodiments, the perfluoro O-ring seals are multiple and axially spaced apart.

In some embodiments, a hydrogen introduction reduction device includes a quartz tube having a closed end and an open end which are opposite to each other in an axial direction, the closed end being provided with a reactant introduction tube for introducing a reactant for a hydrogen reduction reaction into the quartz tube, and a conical tube having both ends open and having a conical cylindrical portion and a cylindrical portion connected to each other, the conical cylindrical portion being adapted to be disposed in the quartz tube and spaced apart from the closed end of the quartz tube in the axial direction, the cylindrical portion being adapted to extend outward from the open end of the quartz tube in the axial direction; the hydrogen-introducing reduction device also comprises the sealing loop.

In some embodiments, the reactant inlet tube is a single piece with the quartz tube.

In some embodiments, the hydrogen-introducing reduction device further comprises a connecting pipe, and the connecting pipe is sleeved on the barrel part of the conical pipe sealing sleeve in a sealing manner.

In some embodiments, the connecting tube is a bellows.

The beneficial effects of this disclosure are as follows: in the disclosure, the perfluoro O-shaped sealing ring and the conical tube sealing sleeve form double sealing, so that the sealing performance of the assembled quartz tube and the conical tube is improved; the quartz tube and the conical tube are completely detachably assembled in a nondestructive mode, the sealing loop and the assembled quartz tube and conical tube are completely detachably assembled in a nondestructive mode, and the quartz tube sealing sleeve, the conical tube sealing sleeve, the sealing pre-tightening gland and the perfluoro O-shaped sealing ring of the sealing loop are completely detachably assembled in a nondestructive mode, so that the reuse rate of the quartz tube, the conical tube and the sealing loop is improved, the assembling operation (namely the mounting operation) is convenient and efficient, and the production cost is greatly reduced; the quartz tube sealing sleeve, the conical tube sealing sleeve, the sealing pre-tightening gland and the perfluoro O-shaped sealing ring of the sealing loop 3 can be pre-assembled together and then assembled with the assembled quartz tube and the assembled conical tube, so that the operation efficiency (namely the installation efficiency) is further improved.

Drawings

Fig. 1 is a schematic cross-sectional view of an embodiment of a hydrogen-passage reduction device according to the present disclosure.

Fig. 2 is an assembled perspective view of a sealing loop of the hydrogen-passage reduction device of fig. 1, in which a perfluoro O-ring is not shown.

Fig. 3 is an assembled perspective view of fig. 2 from another angle.

Fig. 4 is a sectional assembly view of a sealing loop of the hydrogen reduction apparatus of fig. 1.

Fig. 5 is a cross-sectional exploded view of fig. 4.

Wherein the reference numerals are as follows:

100 lead to hydrogen reduction device 312 protruding ring portion

L axial 312a groove

1 quartz tube 32 conical tube sealing sleeve

11 closed end 321 barrel part

12 opening end 322 flange part

13 reactant inlet pipe 33 sealing pre-tightening gland

14 outer peripheral wall surface 331 peripheral wall

2 concave part of conical tube 331a

21 cone 332 end wall

22 cylindrical portion 332a through hole

3 sealing loop 34 perfluoro O type sealing ring

31 quartz tube sealing sleeve 4 connecting tube

311 straight cylinder section

Detailed Description

The accompanying drawings illustrate embodiments of the present disclosure and it is to be understood that the disclosed embodiments are merely examples of the disclosure, which can be embodied in various forms, and therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present disclosure.

Referring to fig. 1, the hydrogen-supplying reduction apparatus 100 includes a quartz tube 1, a tapered tube 2, and a sealing loop 3.

The quartz tube 1 has a closed end 11 and an open end 12 opposite to each other in the axial direction L. The closed end 11 is provided with a reactant inlet pipe 13, and the reactant inlet pipe 13 is used for introducing a reactant of the hydrogen reduction reaction into the quartz tube 1. Although one reactant inlet tube 13 is shown in the figures as a manifold tube, i.e., all of the reactants for the hydrogen reduction reaction are merged and introduced into the quartz tube 1, in an alternative embodiment, all of the reactants for the hydrogen reduction reaction are each sealingly disposed through the closed end 11 of the quartz tube 1 via a respective tube. In fig. 1, the reactant inlet tube 13 and the quartz tube 1 are a single-piece, i.e., the reactant inlet tube 13 and the quartz tube 1 are integrally formed from the same material, rather than being assembled separately.

The tapered tube 2 is open at both ends and has a tapered cylindrical portion 21 and a cylindrical portion 22 connected to each other. The tapered cylinder portion 21 is configured to be disposed in the quartz tube 1 and spaced apart from the closed end 11 of the quartz tube 1 in the axial direction L, and the cylindrical portion 22 is configured to extend outward from the open end 12 of the quartz tube 1 in the axial direction L. Note that the minimum outer diameter of the tapered tube portion 21 is equal to the outer diameter of the cylindrical portion 22, and the maximum outer diameter of the tapered tube portion 21 is larger than the through hole 332a of the below-described preload seal 33 of the seal loose sleeve 3, so that the tapered tube 2 is prevented from directly coming out of the through hole 332a of the below-described preload seal 33 of the seal loose sleeve 3. In addition, the tapered cylinder part 21 increases the surface area of the inner peripheral surface thereof, increases the contact area of the hydrogen reduction reaction deposit, is favorable for reducing the thermal stress, and improves the service life of the tapered tube 2.

The portion of the quartz tube 1 spaced apart from the tapered tube 2 is used for carrying out hydrogen-passing reduction reaction of the reactant, and the tapered tube 2 is used for condensing and depositing a reduction product formed by the hydrogen-passing reduction reaction. In one embodiment, tapered tube 2 is a quartz deposition tube, but in other embodiments tapered tube 2 is a borosilicate deposition tube. In fig. 1, in the assembled state, the outer periphery of the end portion of the tapered cylinder portion 21 of the tapered tube 2 close to the closed end 11 of the quartz tube 1 is close to but does not contact the inner peripheral wall of the quartz tube 1, in other words, the maximum outer diameter of the tapered cylinder portion 21 of the tapered tube 2 and the inner diameter of the quartz tube 1 are dimensioned so as not to interfere, whereby the tapered tube 2 can be easily moved in and out of the quartz tube 1 at the time of assembly and disassembly.

The sealing loop 3 comprises a quartz tube sealing sleeve 31, a conical tube sealing sleeve 32, a sealing pre-tightening gland 33 and a perfluoro O-shaped sealing ring 34, as shown in figures 1 to 5.

The quartz tube sealing sleeve 31 is used for being sleeved at the opening end 12 of the quartz tube 1, and the quartz tube sealing sleeve 31 is provided with external threads (not shown).

The seal preload cap 33 is cylindrical. The seal preload cap 33 has a perimeter wall 331 and an end wall 332. The peripheral wall 331 and the end wall 332 are connected to each other, the peripheral wall 331 is open at one end in the axial direction L remote from the end wall 332, the peripheral wall 331 has an internal thread (not shown) on an inner peripheral surface thereof for screwing with an external thread of the quartz tube sealing sleeve 31, and the end wall 332 has a through hole 332 a. To improve the ease of installation, the end face of the circumferential wall 331 of the seal preload gland 33 in the axial direction L is chamfered near the inner circumferential surface, and likewise, the quartz tube seal gland 31 (i.e., the straight cylindrical section 311 described below) is also chamfered accordingly, as shown in fig. 5.

The tapered tube sealing sleeve 32 includes a cylindrical portion 321 and a flange portion 322. The cylindrical portion 321 is fitted over the cylindrical portion 22 of the taper pipe 2 extending out of the quartz tube 1 and is inserted through the through hole 332a of the seal preload cap 33. A flange portion 322 extends radially outwardly from one end of the cylindrical portion 321 in the axial direction L, and the flange portion 322 is used to be clamped between the quartz tube sealing sleeve 31 and the end wall 332 of the seal pre-tightening gland 33 and completely block the open end 12 of the quartz tube 1 when the quartz tube sealing sleeve 31 and the seal pre-tightening gland 33 are screwed together.

The perfluoro O-ring 34 is provided on the inner peripheral wall 331 of the quartz tube sealing sleeve 31 and is fitted over the outer peripheral wall surface 14 at the open end 12 of the quartz tube 1.

In one example, as shown in fig. 5, the quartz tube gland 31 is convex and includes a straight cylindrical section 311 and a convex ring portion 312, the external thread of the quartz tube gland 31 is provided to the straight cylindrical section 311, and the convex ring portion 312 is located at one end of the straight cylindrical section 311 in the axial direction L and protrudes radially outward. Further, when the quartz tube sealing sleeve 31 is in threaded connection with the pre-tightening gland 33 to clamp the flange portion 322 of the conical tube sealing sleeve 32 between the quartz tube sealing sleeve 31 and the end wall 332 of the pre-tightening gland 33, the convex ring portion 312 of the quartz tube sealing sleeve 31 is spaced from the circumferential wall 331 of the pre-tightening gland 33 along the axial direction L, that is, the threaded connection between the quartz tube sealing sleeve 31 and the pre-tightening gland 33 is not over the entire axial length L of the quartz tube sealing sleeve 31, which can be achieved by setting the size of the circumferential wall 331 of the pre-tightening gland 33 in the axial direction L or the length of the external thread provided on the straight cylindrical section 311 of the quartz tube sealing sleeve 31, thereby preventing the quartz tube sealing sleeve 31 from being excessively tightened and further preventing the flange portion 322 of the conical tube sealing sleeve 32 and the end face at the opening end 12 of the quartz tube 1 from being crushed.

As shown in fig. 3, the collar portion 312 is provided with a plurality of grooves 312a arranged at intervals along the circumference, and each groove 312a penetrates the collar portion 312 in the axial direction L and opens in the radial direction. The groove 312a facilitates the operator to grasp the quartz tube sealing boot 31 and fix the position of the quartz tube sealing boot 31 relative to the sealing pre-tightening gland 33 and relative to the open end 12 of the quartz tube 1 when the quartz tube sealing boot 31 is threadedly coupled to the sealing pre-tightening gland 33, thereby facilitating the positioning of the quartz tube sealing boot 31 and the tightening of the sealing pre-tightening gland 33 onto the quartz tube sealing boot 31.

Similarly, as shown in fig. 3, the outer surface of the circumferential wall 331 of the seal biasing cover 33 has a plurality of recesses 331a arranged at intervals around the circumference, and each of the recesses 331a penetrates the circumferential wall 331 in the axial direction L and is open in the radial direction. The recess 331a is advantageous for increasing the frictional force of an operator gripping the pre-tightening gland 33 when the pre-tightening gland 33 is threadedly coupled with the quartz tube sealing gland 31, so that the operator's effort can be sufficiently used to threadedly couple the pre-tightening gland 33 with the quartz tube sealing gland 31.

In the figure, the perfluoro O-rings 34 are two and arranged at intervals in the axial direction L. The present disclosure is not limited thereto, and the perfluoro O-ring 34 may be one or more than three. That is, the perfluoro O-ring 34 may be one or more. When the number of the fluorine O-ring seals 34 is plural, the plural fluorine O-ring seals 34 are arranged at intervals in the axial direction L.

The perfluoro O-shaped sealing ring 34 has the advantages of excellent chemical stability, chemical medium resistance, high temperature resistance, weather aging resistance, ozone resistance, low hygroscopicity, small air permeability and the like. In addition, the perfluoro O-shaped sealing ring 34 can be used under the vacuum condition, and the vacuum performance is excellent.

In the hydrogen-introducing reduction reaction device disclosed by the invention, the quartz tube 1 and the conical tube 2 are only assembled in a plug-in mode (namely, detachably assembled in a lossless mode), the sealing loop 3 is assembled in a completely detachable lossless mode, namely, the quartz tube sealing sleeve 31, the conical tube sealing sleeve 32, the sealing pre-tightening pressing cover 33 and the perfluoro O-shaped sealing ring 34 can be assembled and disassembled in a completely detachable lossless mode, the reuse rate of the quartz tube 1, the conical tube 2 and the sealing loop 3 is improved, the assembly operation is convenient, and the production cost is greatly reduced. The perfluoro O-ring seal 34 and the conical tube gland 32 form a double seal, improving the sealing of the assembled quartz tube 1 and conical tube 2.

In addition, when in use, the quartz tube sealing sleeve 31, the conical tube sealing sleeve 32, the sealing pre-tightening gland 33 and the perfluoro O-shaped sealing ring 34 of the sealing loop 3 can be pre-assembled together, namely the sealing pre-tightening gland 33 is in threaded connection with one part of the quartz tube sealing sleeve 31 instead of being screwed in place, so that once the sealing loop 3 is required to be used, the pre-assembled sealing loop 3 is positioned on the assembled quartz tube 1 and conical tube 2, and then the sealing pre-assembled sealing loop 3 is screwed, so that the operation efficiency is greatly improved, and the risk that the quartz tube sealing sleeve 31, the conical tube sealing sleeve 32, the sealing pre-tightening gland 33 and the perfluoro O-shaped sealing ring 34 of the sealing loop 3 are lost is also avoided.

As shown in fig. 1, in one example, the hydrogen-feeding reduction device 100 further includes a connection pipe 4, and the connection pipe 4 is sealingly fitted around the cylindrical portion 321 of the tapered pipe sealing sleeve 32. The connection tube 4 is used to communicate the reaction gas inside the quartz tube 1 and the tapered tube 2 to the outside for collection or treatment. In the drawings, the connection pipe 4 is a bellows pipe, but is not limited thereto, and the connection pipe 4 is any suitable pipe.

Note that the hydrogen-passing reduction device 100 of the present disclosure can be applied to any suitable hydrogen-passing reaction and the need to deposit a reducing simple substance, and likewise, the sealing loop 3 of the present disclosure can be applied to any suitable sealing application, and is not limited to the aforementioned hydrogen-passing reduction device 100.

In summary, in the present disclosure, the perfluoro O-ring 34 and the tapered tube sealing sleeve 32 form a double seal, which improves the sealing performance of the assembled quartz tube 1 and the tapered tube 2; the quartz tube 1 and the conical tube 2 are completely detachably assembled in a nondestructive way, the sealing loop 3 and the assembled quartz tube 1 and conical tube 2 are completely detachably assembled in a nondestructive way, the quartz tube sealing sleeve 31, the conical tube sealing sleeve 32, the sealing pre-tightening gland 33 and the perfluoro O-shaped sealing ring 34 of the sealing loop 3 are completely detachably assembled in a nondestructive way, the reuse rate of the quartz tube 1, the conical tube 2 and the sealing loop 3 is improved, the assembly operation (namely the installation operation) is convenient and efficient, and the production cost is greatly reduced; the quartz tube sealing sleeve 31, the conical tube sealing sleeve 32, the sealing pre-tightening gland 33 and the perfluoro O-shaped sealing ring 34 of the sealing loop 3 can be pre-assembled together and then assembled with the assembled quartz tube 1 and the assembled conical tube 2, so that the operation efficiency (namely the installation efficiency) is further improved.

The above detailed description is used to describe a number of exemplary embodiments, but is not intended to limit the combinations explicitly disclosed herein. Thus, unless otherwise specified, various features disclosed herein can be combined together to form a number of additional combinations that are not shown for the sake of brevity.

Claims

1. A sealing loop (3) is characterized by comprising a quartz tube sealing sleeve (31), a conical tube sealing sleeve (32), a sealing pre-tightening gland (33) and a perfluoro O-shaped sealing ring (34);

the quartz tube sealing sleeve (31) is sleeved at the opening end (12) of the quartz tube (1), the quartz tube sealing sleeve (31) is provided with external threads,

the sealing pre-tightening gland (33) is cylindrical, the sealing pre-tightening gland (33) is provided with a peripheral wall (331) and an end wall (332), the peripheral wall (331) and the end wall (332) are connected with each other, one end of the peripheral wall (331) far away from the end wall (332) in the axial direction (L) is opened, the peripheral wall (331) is provided with internal threads on the inner peripheral surface, the internal threads are used for being screwed with external threads of the quartz tube sealing sleeve (31), and the end wall (332) is provided with a through hole (332 a);

the conical tube sealing sleeve (32) comprises a cylinder part (321) and a flange part (322), the cylinder part (321) is used for being sleeved on a cylinder part (22) of the conical tube (2) extending out of the quartz tube (1) and used for penetrating through a through hole (332a) of the sealing pre-tightening gland (33), the flange part (322) extends outwards from one end of the cylinder part (321) in the axial direction (L) in the radial direction, and the flange part (322) is used for being clamped between the quartz tube sealing sleeve (31) and an end wall (332) of the sealing pre-tightening gland (33) when the quartz tube sealing sleeve (31) and the sealing pre-tightening gland (33) are in threaded connection and completely plugging an opening end (12) of the quartz tube (1);

the perfluoro O-shaped sealing ring (34) is arranged on the inner peripheral wall (331) of the quartz tube sealing sleeve (31) and is sleeved on the outer peripheral wall surface (14) at the opening end (12) of the quartz tube (1).

2. The sealing tap (3) according to claim 1, characterized in that the quartz tube sealing sleeve (31) is convex and comprises a straight cylindrical section (311) and a convex ring portion (312), the external thread of the quartz tube sealing sleeve (31) is arranged at the straight cylindrical section (311), the convex ring portion (312) is located at one end of the straight cylindrical section (311) in the axial direction (L) and protrudes radially outwards.

3. Sealing looper (3) according to claim 2,

when the quartz tube sealing sleeve (31) is in threaded connection with the sealing pre-tightening gland (33) to clamp the flange part (322) of the conical tube sealing sleeve (32) between the quartz tube sealing sleeve (31) and the end wall (332) of the sealing pre-tightening gland (33), the convex ring part (312) of the quartz tube sealing sleeve (31) is spaced from the peripheral wall (331) of the sealing pre-tightening gland (33) along the axial direction (L).

4. The sealing looper (3) according to claim 2, characterized in that the collar portion (312) is provided with a plurality of grooves (312a) arranged at intervals along the circumference, each groove (312a) penetrating the collar portion (312) in the axial direction (L) and opening in the radial direction.

5. The sealing looper (3) according to claim 1, wherein an outer surface of a peripheral wall (331) of the sealing preload cap (33) has a plurality of recesses (331a) circumferentially arranged at intervals, each recess (331a) penetrating the peripheral wall (331) in an axial direction (L) and opening in a radial direction.

6. Sealing tap (3) according to claim 1, characterised in that the perfluoro O-ring (34) is in a plurality of strips and is spaced in the axial direction (L).

7. A hydrogen-feeding reduction device (100) comprises a quartz tube (1) and a conical tube (2),

the quartz tube (1) is provided with a closed end (11) and an open end (12) which are opposite to each other in the axial direction (L), the closed end (11) is provided with a reactant inlet tube (13), the reactant inlet tube (13) is used for introducing a reactant of hydrogen reduction reaction into the quartz tube (1),

the two ends of the conical tube (2) are open and are provided with a conical tube part (21) and a cylindrical part (22) which are connected with each other, the conical tube part (21) is used for being placed in the quartz tube (1) and is spaced from the closed end (11) of the quartz tube (1) along the axial direction (L), and the cylindrical part (22) is used for extending outwards from the open end (12) of the quartz tube (1) along the axial direction (L);

characterized in that the hydrogen-through reduction device (100) further comprises a sealing loop (3) according to any one of claims 1 to 6.

8. The hydrogen-feeding reduction device (100) according to claim 7, wherein the reactant-feeding tube (13) is a single-piece and integral member with the quartz tube (1).

9. The hydrogen-introducing reduction device (100) according to claim 7, wherein the hydrogen-introducing reduction device (100) further comprises a connecting pipe (4), and the connecting pipe (4) is hermetically sleeved on the cylinder portion (321) of the tapered pipe sealing sleeve (32).

10. The hydrogen-feeding reduction device (100) according to claim 9, wherein the connection pipe (4) is a bellows.