CN212662947U

CN212662947U - Mounting device for mounting filter and filter device

Info

Publication number: CN212662947U
Application number: CN202020642970.2U
Authority: CN
Inventors: 贾彦杰; 古丽; 熊明; 聂建; 邓勇; 罗杰; 梁博; 邱勇智
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2021-03-09
Anticipated expiration: 2030-04-24

Abstract

The utility model provides a mounting device and filter equipment for installing filter belongs to filter technical field. The mounting device comprises a short section and two flange connecting assemblies, each flange connecting assembly comprises a first flange ring, a second flange ring and a plurality of flanges are buckled, the first flange ring of one flange connecting assembly is coaxially sleeved at one end of the short section, the first flange ring of the other flange connecting assembly is coaxially sleeved at the other end of the short section, one end face of each second flange ring is provided with a groove, each flange buckle comprises a transverse rod and a vertical rod, one end of the transverse rod is fixedly connected with one end of the vertical rod, the joint of the transverse rod and the vertical rod is hinged on the first flange ring, the other end of the transverse rod is provided with a threaded hole, a jacking screw rod is inserted in the threaded hole, the other end of the vertical rod is provided with a hook body, and the hook body. This disclosure can improve the dismantlement efficiency of filter through this installation device.

Description

Mounting device for mounting filter and filter device

Technical Field

The utility model belongs to the technical field of the filter installation, in particular to a mounting device and filter equipment for installing filter.

Background

During natural gas transportation, it is generally necessary to arrange a filter at the inlet of the compressor, by which particulate matter is filtered out to increase the service life of the impeller of the compressor.

In order to extend the useful life of the filter, the filter needs to be periodically removed to clean the filter. In the related technology, a filter is fixedly arranged in a short section, then two short section flanges are coaxially arranged at two ends of the short section respectively, and finally the corresponding short section flanges and pipeline flanges are connected through a plurality of bolts. When the filter is dismantled to needs, at first dismantle the bolt and realize the separation of nipple joint and pipeline, then dismantle down the filter from the nipple joint can.

However, when dismantling the nipple joint, need all dismantle the bolt on the nipple joint flange, because the bolt is in large quantity, and reasons such as bolt corrosion all can make nipple joint dismantlement speed slower to cause the filter to dismantle inefficiency.

SUMMERY OF THE UTILITY MODEL

The embodiment of the disclosure provides a mounting device for mounting a filter and a filtering device, which can improve the dismounting efficiency of the filter. The technical scheme is as follows:

in a first aspect, the disclosed embodiments provide a mounting device for mounting a filter, the mounting device including a nipple and two flange connection assemblies;

each flange connecting assembly comprises a first flange ring, a second flange ring and a plurality of flange buckles, the second flange ring is arranged opposite to the first flange ring, the first flange ring of one flange connecting assembly is coaxially sleeved at one end of the short section, the first flange ring of the other flange connecting assembly is coaxially sleeved at the other end of the short section, and one end face of each second flange ring is provided with a groove;

the edge is detained to a plurality of flanges first flange ring circumference interval arrangement, every the flange is detained and is all included horizontal pole and montant, to arbitrary one the flange is detained, the one end of horizontal pole with the one end fixed connection of montant, the horizontal pole with the junction of montant articulates on the outward flange of first flange ring, just the horizontal pole is arranged first flange ring orientation one side of nipple joint, the other end of horizontal pole is provided with and runs through the screw hole of horizontal pole, the plug screw rod that is used for with a terminal surface counterbalance of first flange ring is equipped with in the screw hole, the plug screw rod with screw hole screw-thread fit, the other end of montant sets up the coupler body, coupler body detachably cartridge is in the recess.

Optionally, a plurality of mounting seats are arranged on the outer edge of the end face of each first flange ring facing the short section, the outer edge of each mounting seat facing away from the first flange ring protrudes out of the outer edge of the corresponding first flange ring, each mounting seat corresponds to each flange fastener one to one, and the joint of the outer edge of each mounting seat and the corresponding flange fastener is hinged together.

Optionally, each of the mounting seats includes two lug plates arranged in parallel, the two lug plates are fixed on one end surface of the first flange ring, the two lug plates deviate from the outer edge of the first flange ring and protrude out of the corresponding outer edge of the first flange ring, the same pin shaft is inserted into the outer edge of each of the two lug plates, the axis of the pin shaft is perpendicular to the axis of the first flange ring, the joint of the flange buckle corresponding to the two lug plates is arranged between the two lug plates, and the two lug plates are rotatably sleeved on the pin shaft.

Optionally, at least one sealing ring is coaxially arranged on an end face of each first flange ring facing away from the short joint.

Optionally, an end surface of each first flange ring facing away from the short section is coaxially provided with at least one ring groove, each ring groove corresponds to each sealing ring one to one, and each sealing ring is inserted into the corresponding ring groove.

Optionally, a cushion block is arranged at one end of each jacking screw rod facing the first flange ring.

Optionally, each of the cushion blocks is a spherical structural member, and an axis of each of the jacking screws passes through a spherical center of the corresponding cushion block.

Optionally, one end of the jacking screw rod, which is far away from the first flange ring, is coaxially provided with a hexagonal nut.

Optionally, a positioning ring is coaxially arranged on the other end surface of each second flange ring, the positioning ring is detachably inserted into the inner hole of the short section, and the outer diameter of the positioning ring is equal to the inner diameter of the short section.

In a second aspect, embodiments of the present disclosure provide a filter device comprising a filter and a mounting device as described in the first aspect, the filter being mounted within the nipple of the mounting device.

The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:

through the installation device for installing the filter that this disclosed embodiment provided, when the installation filter, at first, arrange the filter on the internal perisporium of nipple joint to with two coaxial suits of second flange ring respectively at two pipeline tip of arranging relatively, and the terminal surface of each second flange ring all arranges towards corresponding pipeline. And then, placing the short section between the two second flange rings, and enabling each first flange ring to be abutted against the corresponding second flange ring. And then, rotating each flange fastener to enable the hook bodies on the vertical rods of each flange fastener to be inserted into the corresponding grooves, so that the first flange ring and the second flange ring are connected. Finally, the jacking screw rods on the cross rods of the flange buckles are screwed, so that the jacking screw rods are abutted to the end faces of the corresponding first flange rings, the cross rods have the tendency of moving towards the short sections under the action of jacking force of the jacking screw rods, the cross rods can also give axial component force to the vertical rods towards the short sections, and the hook bodies of the second ends of the vertical rods are inserted into the grooves of the second flange rings due to the fact that one ends of the vertical rods are hinged to the first flange rings, so that the hook bodies have the tendency of moving towards the first flange rings under the action of the axial component force, and the hook bodies can be firmly abutted to and buckled in the grooves. In addition, under the effect of jacking screw rod jack-up effect, make the horizontal pole deviate from first flange ring and rotate, make the montant rotate towards second flange ring, thereby further make the coupler body firmly support and detain in the recess, just also can make first flange ring and second flange ring zonulae occludens, and then just also can realize the firm installation of nipple joint between two sections pipelines.

In a similar way, when the filter is required to be disassembled, the jacking screws are unscrewed to remove jacking force, and the tight connection between the first flange ring and the second flange ring can be removed only by unscrewing the jacking screws because the jacking screws are abutted to the first flange ring. And then the flange fastener is rotated to separate the hook body from the groove, so that the mounting device can be conveniently detached, and finally, the filter can be detached from the mounting device.

That is to say, this installation device for installing filter that this disclosure provided can not only guarantee the convenient installation of filter, can realize the quick dismantlement of installation device through each flange knot and jack-up screw rod when dismantling moreover to realize the quick dismantlement of filter, make the filter labour saving and time saving is changed in the maintenance, avoided using the bolt to dismantle and cause the problem that the filter dismantles inefficiency.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a partially disassembled schematic view of a mounting device for mounting a filter provided by an embodiment of the present disclosure;

FIG. 2 is an assembled schematic view of a mounting device provided by an embodiment of the present disclosure;

FIG. 3 is an assembly schematic view of a jack screw provided by an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a second flange ring provided in an embodiment of the present disclosure.

The symbols in the drawings represent the following meanings:

1. a short section; 2. a flange connection assembly; 21. a first flange ring; 211. a mounting seat; 2111. an ear plate; 212. a pin shaft; 213. a seal ring; 214. a ring groove; 22. a second flange ring; 221. a groove; 222. a positioning ring; 23. fastening a flange; 231. a cross bar; 2311. a threaded hole; 232. a vertical rod; 2321. a hook body; 233. jacking the screw rod; 2331. cushion blocks; 2332. a hexagonal nut; 100. a pipeline.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Fig. 1 is a schematic partially disassembled view of a mounting device for mounting a filter provided by an embodiment of the present disclosure, and as shown in fig. 1, the mounting device includes a short section 1 and two flange connecting assemblies 2.

Every flange coupling assembling 2 all includes first flange ring 21, with first flange ring 21 relative arrangement's second flange ring 22 and a plurality of flange knot 23, the one end at nipple joint 1 is established to the coaxial cover of first flange ring 21 of a flange coupling assembling 2, the other end at nipple joint 1 is established to the coaxial cover of first flange ring 21 of another flange coupling assembling 2, a terminal surface of every second flange ring 22 all is provided with recess 221.

A plurality of flange buckles 23 are arranged along first flange ring 21 circumference interval, every flange buckle 23 all includes horizontal pole 231 and montant 232, to arbitrary one flange buckle 23, the one end of horizontal pole 231 and the one end fixed connection of montant 232, the junction of horizontal pole 231 and montant 232 articulates on the outward flange of first flange ring 21, and horizontal pole 231 arranges in one side of first flange ring 21 towards nipple 1, the other end of horizontal pole 231 is provided with the screw hole 2311 that runs through horizontal pole 231, the jack-up screw rod 233 that is used for offsetting with a terminal surface of first flange ring 21 is inserted in the screw hole 2311, jack-up screw rod 233 and screw hole 2311 screw-thread fit, the other end of montant 232 sets up coupler body 2321, coupler body 2321 detachably cartridge is in recess 221.

Through the installation device for installing the filter that this disclosed embodiment provided, when installing the filter, at first, arrange the filter on the internal perisporium of nipple 1 to with two second flange rings 22 coaxial suit respectively in two pipeline 100 tip of arranging relatively, and each second flange ring 22's an terminal surface all arranges towards corresponding pipeline 100. Next, the sub 1 is placed between two second flange rings 22, with each first flange ring 21 abutting a corresponding second flange ring 22. Then, each flange fastener 23 is rotated, so that the hook 2321 on the vertical rod 232 of each flange fastener 23 is inserted into the corresponding groove 221 (see fig. 2), thereby achieving the connection between the first flange ring 21 and the second flange ring 22. Finally, the jacking screws 233 on the crossbars 231 of the flange buckles 23 are screwed, so that the jacking screws 233 abut against the corresponding end surfaces of the first flange rings 21, the crossbars 231 have a tendency to move towards the pipe nipple 1 under the action of jacking forces of the jacking screws 233, the crossbars 231 also give the vertical rods 232 a component force in the axial direction towards the pipe nipple 1, and the hook bodies 2321 at the second ends of the vertical rods 232 are inserted into the grooves 221 of the second flange rings 22, so that the hook bodies 2321 have a tendency to move towards the first flange rings 21 under the action of the component force in the axial direction, and the hook bodies 2321 are firmly abutted against the grooves 221. In addition, under the effect of jack screw 233 jack force, make horizontal pole 231 deviate from first flange ring 21 and rotate, make montant 232 rotate towards second flange ring 22, thereby further make hook 2321 firmly support and detain in recess 221, just also can make first flange ring 21 and second flange ring 22 zonulae occludens, and then just also can realize the firm installation of nipple joint 1 between two sections pipelines.

In the same way, when the filter needs to be disassembled, the jacking screws 233 are unscrewed to release the jacking force, and the jacking screws 233 abut against the first flange ring 21, so that the tight connection between the first flange ring 21 and the second flange ring 22 can be released only by unscrewing the jacking screws 233. The flange fastener 23 is rotated to separate the hook 2321 from the groove 221, so that the mounting device can be conveniently disassembled, and finally, the filter can be disassembled from the mounting device.

That is to say, this installation device for installing filter that this disclosure provided can not only guarantee the convenient installation of filter, can realize the quick dismantlement of installation device through each flange knot 23 and jack-up screw 233 when dismantling moreover to realize the quick dismantlement of filter, make the filter labour saving and time saving is changed in the maintenance, avoided using the bolt to dismantle and cause the problem that the filter dismantles inefficiency. In addition, the installation device can be suitable for installing natural long-distance pipelines.

It should be noted that, in this embodiment, the cross bar 231 and the vertical bar 232 of each flange fastener 23 are vertically arranged, so that when the hook 2321 is inserted into the groove 221, the cross bar 231 is arranged parallel to the first flange ring 21, and the vertical bar 232 is axially arranged along the first flange ring 21, so that the acting force of the cross bar 231 on the vertical bar 232 is completely axially arranged along the first flange ring 21, and the first flange ring 21 and the second flange ring 22 are connected more tightly.

It should be noted that the hook tip of the hook body 2321 is a smooth member, thereby preventing the hook tip from damaging the groove 221.

Referring to fig. 1 again, a plurality of mounting seats 211 are arranged on the outer edge of the end surface of each first flange ring 21 facing the pipe nipple 1, the outer edge of each mounting seat facing away from the first flange ring 21 protrudes out of the outer edge of the corresponding first flange ring 21, each mounting seat 211 corresponds to each flange buckle 23 one by one, and the connecting part of the outer edge of each mounting seat 211 and the corresponding flange buckle 23 is hinged together.

In the above embodiment, the outer edge of the mounting seat 211 is hinged to the corresponding joint of the snap flange 23, which not only facilitates the engagement between the hook 2321 and the groove 221, but also enables the hinge joint of the snap flange 23 to be spaced from the outer edge of the first flange ring 21, which facilitates the rotation of the snap flange 23.

Illustratively, 4 flange buckles 23 may be disposed on each first flange ring 21, and in other embodiments of the present disclosure, 6 flange buckles 23 may be disposed on each first flange ring 21, which is not limited by the present disclosure.

Optionally, each of the mounting seats 211 includes two ear plates 2111 arranged in parallel, the two ear plates 2111 are fixed on an end surface of the first flange ring 21, the outer edges of the two ear plates 2111 departing from the first flange ring 21 protrude out of the outer edges of the corresponding first flange ring 21, the same pin shaft 212 is inserted into the outer edges of the two ear plates 2111, the axis of the pin shaft 212 is perpendicular to the axis of the first flange ring 21, a connection portion of the flange buckle 23 corresponding to the two ear plates 2111 is arranged between the two ear plates 2111, and the connection portion is rotatably sleeved on the pin shaft 212.

In the above embodiment, the two ear plates 2111 can make the force applied to the flange fastener 23 during the hinge joint more uniform, so that the rotation of the flange fastener 23 is more stable.

Illustratively, each ear plate 2111 is welded to a corresponding first flange ring 21.

In the above embodiment, the lug plate 2111 is welded to the first flange ring 21, and the strength of connection between the lug plate 2111 and the first flange ring 21 can be increased.

With continued reference to fig. 1, at least one sealing ring 213 is coaxially arranged on the end face of each first flange ring 21 facing away from the pipe nipple 1.

In the above embodiment, the seal ring 213 functions to seal the gap between the first flange ring 21 and the second flange ring 22, thereby preventing leakage of gas.

For example, the number of the sealing rings 213 may be 3, and the plurality of sealing rings 213 are concentrically arranged at intervals, and the plurality of sealing rings 213 may further ensure the sealing property of the connection between the first flange ring 21 and the second flange ring 22. In other embodiments of the present disclosure, the number of the sealing rings 213 may be 4, which is not limited by the present disclosure.

Illustratively, the sealing ring 213 may be an elastic sealing ring 213.

In the above embodiment, the elastic seal ring 213 facilitates the clamping of the first flange ring 21 and the second flange ring 22. In addition, when pressure exists in the pipe 100, the pressure generates a certain expansion force to the pipe 100, so that the first flange ring 21 and the second flange ring 22 move in opposite directions in the axial direction, and the clamped elastic sealing ring 213 is expanded. The expansion of the elastic sealing ring 213 causes the first flange ring 21 and the second flange ring 22 to continue to move in the opposite direction in the axial direction, so that the jacking force of the jacking screw 233 increases, thereby further firmly clamping the hook body 2321 in the groove 221.

Optionally, the end surface of each first flange ring 21 facing away from the pipe nipple 1 is coaxially provided with at least one ring groove 214, each ring groove 214 corresponds to each sealing ring 213 one by one, and each sealing ring 213 is inserted into the corresponding ring groove 214.

In the above embodiment, the ring groove 214 facilitates the arrangement of the seal ring 213 on the first flange ring 21, and prevents the seal ring 213 from falling off.

Fig. 3 is an assembly view of the jacking screws provided in the embodiment of the present disclosure, and as shown in fig. 3, a spacer block 2331 is disposed at an end of each jacking screw 233 facing the first flange ring 21.

In the above embodiment, the spacer block 2331 may increase the contact area between the jacking screw 233 and the first flange ring 21, preventing the jacking screw 233 from damaging the first flange ring 21. In addition, since the side surface of the spacer 2331 opposite to the first flange ring 21 has a larger area than the sectional area of the jacking screws 233, the jacking screws 233 can be prevented from being detached from the screw holes 2311.

Optionally, each block 2331 is a spherical structural member and the axis of each jacking screw 233 passes through the spherical center of the corresponding block 2331.

In the above embodiment, the spacer 2331 is a circular structure to reduce the friction between the spacer 2331 and the first flange ring 21 when it rotates.

For example, a plurality of hemispherical recesses (not shown) corresponding to the spacers 2331 may be disposed on the first flange ring 21, and each spacer 2331 is inserted into the corresponding hemispherical recess, so as to increase a contact area, prevent the first flange ring 21 from being damaged, and enable the spacers 2331 to rotate more stably.

Illustratively, the block 2331 and the jack screw 233 are joined together by welding.

In the above embodiment, the welded connection may increase the connection strength of the block 2331 and the jack-up screw 233.

With continued reference to fig. 3, the end of the jacking screw 233 facing away from the first flange ring 21 is coaxially provided with a hexagonal nut 2332.

In the above embodiment, the hexagonal nut 2332 is easily engaged with a wrench to screw the jack-up screw 233, thereby improving the disassembly efficiency.

In other embodiments of the present disclosure, an end of the jacking screw 233 facing away from the first flange ring 21 may also be provided with a turning handle, which also functions to screw the jacking screw 233, which is not limited by the present disclosure.

Fig. 4 is a schematic structural diagram of second flange rings provided in the embodiment of the present disclosure, and as shown in fig. 4, a positioning ring 222 is coaxially disposed on the other end surface of each second flange ring 22, the positioning ring 222 is detachably inserted into an inner hole of the pipe nipple 1, and an outer diameter of the positioning ring 222 is equal to an inner diameter of the pipe nipple 1.

The positioning ring 222 can achieve a quick positioning of the second flange ring 22 when it is connected to the first flange ring 21.

The assembly process of the mounting device is briefly described as follows:

first, the filter is disposed on the inner circumferential wall of the nipple 1, and two second flange rings 22 are coaxially connected to the two pipes 100, respectively, and one end surface of each second flange ring 22 is disposed toward the corresponding pipe 100. Next, the sub 1 is placed between two second flange rings 22, with each first flange ring 21 abutting a corresponding second flange ring 22. Then, each of the buckles 23 is rotated, so that the hook 2321 of the vertical rod 232 of each of the buckles 23 is inserted into the corresponding groove 221 (see fig. 2). Finally, the jacking screws 233 on the cross bars 231 of the flange buckles 23 are screwed, so that the jacking screws 233 abut against the corresponding first flange buckles 23, the first flange ring 21 and the second flange ring 22 are tightly connected, and the short section 1 can be installed between two sections of pipelines 100. Similarly, when the filter needs to be disassembled, the lifting screws 233 are loosened, and the flange fastener 23 is rotated to separate the hook 2321 from the groove 221, so that the disassembling of the mounting device can be conveniently realized, and finally, the filter can be disassembled from the mounting device.

Referring again to fig. 1, the disclosed embodiment also provides a filter device, which includes a filter (not shown) and the above-mentioned mounting device, wherein the filter is mounted in the nipple 1 of the mounting device.

In the above embodiment, the filtering apparatus may have the filter and the mounting apparatus arranged together, and in addition, the mounting apparatus is conveniently connected with the duct 100, so that the filtering apparatus may be quickly arranged in the duct 100.

The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.

Claims

1. A mounting device for mounting a filter, characterised in that it comprises a nipple (1) and two flange connection assemblies (2);

each flange connecting assembly (2) comprises a first flange ring (21), a second flange ring (22) and a plurality of flange buckles (23), the second flange ring (22) is arranged opposite to the first flange ring (21), the first flange ring (21) of one flange connecting assembly (2) is coaxially sleeved at one end of the short section (1), the first flange ring (21) of the other flange connecting assembly (2) is coaxially sleeved at the other end of the short section (1), and one end face of each second flange ring (22) is provided with a groove (221);

the flange buckles (23) are arranged along the circumferential direction of the first flange ring (21) at intervals, each flange buckle (23) comprises a cross rod (231) and a vertical rod (232), one end of each cross rod (231) is fixedly connected with one end of each vertical rod (232) for any one flange buckle (23), the connection part of each cross rod (231) and each vertical rod (232) is hinged to the outer edge of the first flange ring (21), the cross rods (231) are arranged on one side, facing the short sections (1), of the first flange ring (21), threaded holes (2311) penetrating through the cross rods (231) are formed in the other ends of the cross rods (231), jacking screw rods (233) used for abutting against one end face of the first flange ring (21) are inserted in the threaded holes (2311), and the jacking screw rods (233) are in threaded fit with the threaded holes (2311), the other end of the vertical rod (232) is provided with a hook body (2321), and the hook body (2321) is detachably inserted into the groove (221).

2. The mounting device according to claim 1, wherein a plurality of mounting seats (211) are arranged on the outer edge of the end surface of each first flange ring (21) facing the short section (1), the outer edge of each mounting seat facing away from the first flange ring (21) protrudes out of the outer edge of the corresponding first flange ring (21), each mounting seat (211) corresponds to each flange fastener (23) in a one-to-one manner, and the outer edge of each mounting seat (211) is hinged with the corresponding flange fastener (23).

3. The mounting device according to claim 2, wherein each mounting seat (211) includes two ear plates (2111) arranged in parallel, the two ear plates (2111) are fixed on an end surface of the first flange ring (21), outer edges of the two ear plates (2111) facing away from the first flange ring (21) protrude out of outer edges of the corresponding first flange ring (21), the same pin shaft (212) is inserted into outer edges of the two ear plates (2111), an axis of the pin shaft (212) is perpendicular to an axis of the first flange ring (21), and a joint of the flange fastener (23) corresponding to the two ear plates (2111) is arranged between the two ear plates (2111) and is rotatably sleeved on the pin shaft (212).

4. The mounting arrangement according to claim 1, characterized in that at least one sealing ring (213) is arranged coaxially on the end face of each first flange ring (21) facing away from the nipple (1).

5. The mounting arrangement, as set forth in claim 4, characterized in that the end surface of each first flange ring (21) facing away from the nipple (1) is provided coaxially with at least one annular groove (214), each annular groove (214) and each sealing ring (213) are in one-to-one correspondence, and each sealing ring (213) is inserted in the corresponding annular groove (214).

6. The mounting arrangement, as set forth in claim 1, characterized in that each jacking screw (233) is provided with a spacer block (2331) towards one end of the first flanged ring (21).

7. The mounting device as claimed in claim 6, wherein each spacer block (2331) is a spherical structural member and the axis of each jacking screw (233) passes through the spherical center of the corresponding spacer block (2331).

8. Mounting arrangement, as set forth in any of claims 1-7, characterized in that the end of the jacking screw (233) facing away from the first flange ring (21) is coaxially provided with a hexagonal nut (2332).

9. The mounting device according to any one of claims 1 to 7, characterized in that the other end face of each second flange ring (22) is coaxially provided with a positioning ring (222), the positioning ring (222) is detachably inserted into the inner hole of the short joint (1), and the outer diameter of the positioning ring (222) is equal to the inner diameter of the short joint (1).

10. A filter device, characterized in that it comprises a filter and a mounting device according to any one of claims 1-9, said filter being mounted in said nipple (1) of said mounting device.