CN111998158A

CN111998158A - Bellows expansion joint and bellows thereof

Info

Publication number: CN111998158A
Application number: CN202010782232.2A
Authority: CN
Inventors: 梁艳艳
Original assignee: 梁艳艳
Current assignee: ZHEJIANG YUEDING CORRUGATED TUBE Co.,Ltd.
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2020-11-27
Anticipated expiration: 2040-08-06
Also published as: CN111998158B

Abstract

The invention relates to the field of corrugated pipes, in particular to a corrugated pipe expansion joint and a corrugated pipe thereof, which comprise an end pipe, wherein the outer walls of two sides of the end pipe are respectively provided with a first flange and a second flange; the first support lug is connected with a first threaded rod, the second support lug is connected with a second threaded rod, the first threaded rod is also provided with a limiting rod, and the limiting rod is connected to the second threaded rod in a sliding manner; a second spring is arranged between the first knob and the second knob, and the first knob and the second knob are both provided with a fixing component; the invention is suitable for corrugated pipes with different lengths, has a certain buffering effect, can avoid the instability or damage of the corrugated pipe when being stressed, and is more convenient to use.

Description

Bellows expansion joint and bellows thereof

Technical Field

The invention relates to the field of corrugated pipes, in particular to a corrugated pipe expansion joint and a corrugated pipe thereof.

Background

At present, the expansion joint of the corrugated pipe is widely applied to a metallurgical blast furnace gas conveying system, a coke oven gas conveying system and a converter gas conveying system and is used for compensating the displacement of the corrugated pipe caused by expansion and contraction due to temperature influence of pipelines or equipment so as to ensure the safe and reliable work of the system.

The existing metal corrugated pipe expansion joint for the pipeline mostly adopts a corrugated pipe made of austenitic stainless steel so as to bear larger working pressure; however, to storing the in-process of mud sump blowdown, need store the sewage reposition of redundant personnel in the mud sump to each little mud sump of storing always, because the effect of bellows stress at work can cause bellows unstability or damage at the reposition of redundant personnel in-process, greatly reduced the life and the work efficiency of bellows expansion joint, and the expansion joint among the prior art is not suitable for the bellows use of different length, uses and has great limitation, is not convenient for use. If the corrugated pipe is made of other materials, although the service life can be prolonged, the manufacturing cost is high, and the corrugated pipe is not suitable for popularization and application.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a corrugated pipe expansion joint and a corrugated pipe thereof.

In order to achieve the purpose, the invention adopts the following technical scheme:

a corrugated pipe expansion joint comprises an end pipe, wherein a first flange and a second flange are respectively arranged on the outer walls of two sides of the end pipe, two annular plates are sleeved on the outer wall of the middle part of the end pipe, a corrugated pipe body is sleeved between the first flange and the annular plates and between the second flange and the annular plates, and an air bag matched with the corrugated pipe body is further arranged on the outer wall of the end pipe;

the first flange plate and the second flange plate are fixedly connected with first supporting lugs, the outer walls of the two annular plates are connected with second supporting lugs corresponding to the first supporting lugs in position, the first supporting lugs are connected with first threaded rods, the second supporting lugs are connected with second threaded rods, limiting rods are further arranged on the first threaded rods and are connected to the second threaded rods in a sliding mode;

the outer walls of the first threaded rod and the second threaded rod are respectively in threaded connection with a first knob and a second knob, a second spring is arranged between the first knob and the second knob, and fixing assemblies are arranged on the first knob and the second knob.

Preferably, the second threaded rod is provided with an annular groove, the second support lug is provided with a clamping groove, the second threaded rod is connected in the clamping groove through the annular groove, and the second spring is sleeved on the outer walls of the first threaded rod, the second threaded rod and the limiting rod.

Preferably, be equipped with the inflator on the second threaded rod, the gag lever post is pegged graft in the inflator, sliding connection has the piston with gag lever post matched with in the inflator, be equipped with the third spring between the inner wall of piston and inflator, the second threaded rod is arranged in the second and is supported the one end of ear outer wall and be equipped with the first connecting pipe that is linked together with the inflator, the one end that the inflator was kept away from to first connecting pipe is linked together with the gasbag, the gasbag is equipped with a plurality ofly, and is a plurality of the gasbag is the circumference and distributes, and is a plurality of be connected with the second connecting pipe between the gasbag.

Preferably, the limiting rod is provided with a pipeline communicated with the air cylinder, a first one-way valve is arranged in the pipeline, and a second one-way valve is arranged on the inner wall of the bottom of the air cylinder.

Preferably, the fixing assembly mainly comprises a first fixing rod and a second fixing rod, the second fixing rod is connected in the first fixing rod in a sliding mode, annular grooves are formed in the first knob and the second knob, and the first fixing rod is connected in the annular grooves in a sliding mode.

Preferably, sliding connection has first slider in the ring channel, first dead lever fixed connection is at the top outer wall of first slider, be equipped with the recess on the first dead lever, sliding connection has the second slider in the recess, second dead lever fixed connection is at the top outer wall of second slider, still be equipped with the fourth spring between the inner wall of second slider and recess.

Preferably, the equal threaded connection of outer wall of first threaded rod and second threaded rod has stop nut, stop nut is last be equipped with second dead lever matched with shrinkage pool, just stop nut supports the outer wall of ear with first support ear and second respectively and offsets.

Preferably, the two annular plates are connected with sliding rods in a sliding mode, the outer walls of the sliding rods are respectively in threaded connection with a first fixing nut and a second fixing nut, the first fixing nut and the second fixing nut are respectively abutted against the two annular plates, the outer wall of the sliding rod is sleeved with a first spring, and the first spring is connected between the two annular plates.

Preferably, first support ear and second support ear all are equipped with three groups, three groups equally divide on first support ear and the second support ear and do not be equipped with first threaded rod and second threaded rod.

A corrugated pipe is characterized in that a corrugated pipe body is made of stainless steel materials.

Compared with the prior art, the invention provides a corrugated pipe expansion joint and a corrugated pipe thereof, which have the following beneficial effects:

(1) when the corrugated pipe expansion joint is used, the first threaded rod is connected to the first supporting lug, the second threaded rod is placed into the second supporting lug, the first supporting lug and the second supporting lug are abutted by the limiting nut, so that the first threaded rod and the second threaded rod are fixed and are more stably connected, the second threaded rod is provided with the circular groove, the second threaded rod can be conveniently placed into the clamping groove, the first knob and the second knob can be rotated according to the length of the end pipe, the position between the first knob and the second knob can be adjusted, the second spring can ensure that the connection is more stable, a certain damping and buffering effect can be achieved, the damage of the end pipe caused by overlarge bearing pressure can be avoided, meanwhile, the limiting rod slides in the inflator, so that the piston presses gas in the inflator, the gas enters the gas bag through the second one-way valve and the first connecting pipe, and then the gas bag is expanded, thereby supporting the corrugated pipe body, thereby enabling the connection of the corrugated pipe body to be more stable, simultaneously damping the corrugated pipe body and avoiding the damage caused by stress, in addition, the limiting rod can extract the external gas through the pipeline in the automatic resetting process of the third spring so as to inflate the inflator, the first check valve can enable the gas to enter the inflator, the gas in the inflator can not flow out from the first check valve when being compressed by the piston, the second check valve can enable the gas not to flow back after entering the air bag, the outer wall of the air bag is provided with the air release valve, when the gas in the air bag is excessive, the air bag can be decompressed so as to be convenient to use, the third spring can support and damp the limiting rod, the connection effect is better, the first threaded rod and the second threaded rod can be more stably connected so as to be convenient to use, then the first fixed rod is rotated so as to slide in the annular groove under the action of the first sliding block, then press the second dead lever, make it drive second slider compression fourth spring to make the second dead lever slide to the recess on the first dead lever in, then make the second dead lever correspond with the position of the shrinkage pool on the stop nut, make the second dead lever insert in the shrinkage pool, thereby make the position of first knob and second knob fixed, thereby make the distance between first threaded rod and the second threaded rod after the adjustment fixed, facilitate the use.

(2) This bellows expansion joint through rotating first fixation nut and second fixation nut, makes it offset with the outer wall of two annular plates respectively to adjust the distance between two annular plates, and two annular plates can be withstood to first spring, thereby has certain buffering effect when making two annular plate rigidity.

(3) The parts which are not involved in the device are the same as or can be realized by adopting the prior art, the invention can be suitable for corrugated pipes with different lengths, has certain buffer effect, can avoid the corrugated pipe from being unstable or damaged when stressed, and is more convenient to use.

Drawings

Fig. 1 is a schematic structural diagram of a bellows expansion joint according to the present invention;

FIG. 2 is a schematic structural diagram of a bellows expansion joint according to the present invention;

fig. 3 is a schematic structural diagram of a bellows expansion joint according to the present invention;

FIG. 4 is a schematic structural view of a bellows expansion joint according to the present invention

Fig. 5 is a first schematic structural diagram of a first threaded rod and a second threaded rod of a bellows expansion joint according to the present invention;

fig. 6 is a second schematic structural view of the first threaded rod and the second threaded rod of the expansion joint of the corrugated pipe according to the present invention;

FIG. 7 is a schematic structural view of a connection between a first fixing rod and a second fixing rod of a bellows expansion joint according to the present invention;

FIG. 8 is a schematic structural view of portion A of FIG. 1 of a bellows expansion joint in accordance with the present invention;

FIG. 9 is a schematic view of a portion B of the bellows expansion joint of the present invention shown in FIG. 2;

fig. 10 is a schematic structural diagram of a bellows according to the present invention.

In the figure: 1. an end tube; 101. a first flange plate; 102. a second flange plate; 103. a bellows body; 104. a first support ear; 2. an annular plate; 201. a second support ear; 202. a slide bar; 203. a first fixing nut; 204. a second fixing nut; 205. a first spring; 206. a card slot; 3. a first threaded rod; 301. a limit nut; 302. concave holes; 303. a first knob; 304. an annular groove; 4. a second threaded rod; 401. a circular groove; 402. a second knob; 403. a second spring; 404. a limiting rod; 405. a piston; 406. a third spring; 407. a pipeline; 408. a first check valve; 5. a first slider; 501. a first fixing lever; 502. a second fixing bar; 503. a second slider; 504. a fourth spring; 6. an air cylinder; 601. a first connecting pipe; 602. a second one-way valve; 603. an air bag; 604. a second connecting pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example 1:

referring to fig. 1-10, a bellows expansion joint comprises an end pipe 1, wherein a first flange 101 and a second flange 102 are respectively arranged on the outer walls of two sides of the end pipe 1, two annular plates 2 are sleeved on the outer wall of the middle of the end pipe 1, a bellows body 103 is sleeved between the first flange 101 and the annular plates 2 and between the second flange 102 and the annular plates 2, and an air bag 603 matched with the bellows body 103 is further arranged on the outer wall of the end pipe 1;

the first flange plate 101 and the second flange plate 102 are fixedly connected with first supporting lugs 104, the outer walls of the two annular plates 2 are connected with second supporting lugs 201 corresponding to the positions of the first supporting lugs 104, the first supporting lugs 104 are connected with first threaded rods 3, the second supporting lugs 201 are connected with second threaded rods 4, limiting rods 404 are further arranged on the first threaded rods 3, and the limiting rods 404 are connected to the second threaded rods 4 in a sliding mode;

the outer walls of the first threaded rod 3 and the second threaded rod 4 are respectively in threaded connection with a first knob 303 and a second knob 402, a second spring 403 is arranged between the first knob 303 and the second knob 402, and fixing components are arranged on the first knob 303 and the second knob 402.

Be equipped with ring groove 401 on the second threaded rod 4, be equipped with draw-in groove 206 on the second support ear 201, second threaded rod 4 passes through ring groove 401 to be connected in draw-in groove 206, and second spring 403 cup joints the outer wall at first threaded rod 3, second threaded rod 4 and gag lever post 404.

The air cylinder 6 is arranged on the second threaded rod 4, the limiting rod 404 is inserted into the air cylinder 6, the piston 405 matched with the limiting rod 404 is connected in the air cylinder 6 in a sliding mode, a third spring 406 is arranged between the inner walls of the piston 405 and the air cylinder, a first connecting pipe 601 communicated with the air cylinder 6 is arranged at one end, located on the outer wall of the second supporting lug 201, of the second threaded rod 4, one end, away from the air cylinder 6, of the first connecting pipe 601 is communicated with the air bags 603, the air bags 603 are arranged in a plurality, the air bags 603 are distributed in a circumferential mode, a second connecting pipe 604 is connected among the air bags 603, the third spring 406 can drive the piston 405 to abut against the limiting rod 404, and therefore the limiting rod 404 is supported and fixed, when the limiting rod 404 bears large force, certain buffering.

The limiting rod 404 is provided with a pipeline 407 communicated with the air cylinder 6, a first one-way valve 408 is arranged in the pipeline 407, and a second one-way valve 602 is arranged on the inner wall of the bottom of the air cylinder 6.

The fixing assembly mainly comprises a first fixing rod 501 and a second fixing rod 502, the second fixing rod 502 is connected in the first fixing rod 501 in a sliding mode, annular grooves 304 are formed in the first knob 303 and the second knob 402, the first fixing rod 501 is connected in the annular grooves 304 in a sliding mode, the annular grooves 304 enable the second fixing rod 502 to move conveniently, and therefore the second fixing rod can be matched with the concave holes 302 in the limiting nut 301 all the time.

Annular groove 304 sliding connection has first slider 5, first dead lever 501 fixed connection is at the top outer wall of first slider 5, be equipped with the recess on the first dead lever 501, sliding connection has second slider 503 in the recess, second dead lever 502 fixed connection is at the top outer wall of second slider 503, still be equipped with fourth spring 504 between the inner wall of second slider 503 and recess and when fourth spring 504 can make not press second dead lever 502, first dead lever 501 is stretched out all the time to second dead lever 502, it is convenient to cooperate fixedly with shrinkage pool 302.

Equal threaded connection of outer wall of first threaded rod 3 and second threaded rod 4 has stop nut 301, be equipped with on stop nut 301 with second dead lever 502 matched with shrinkage pool 302, and stop nut 301 offsets with the outer wall that first support ear 104 and second supported ear 201 respectively, stop nut 301 can make the position of first threaded rod 3 and second threaded rod 4 fixed on the one hand, be equipped with shrinkage pool 302 on the other hand stop nut 301, can make second dead lever 502 convenient spacing, convenient fixed subassembly is spacing.

In the invention, when in use, the first threaded rod 3 is connected to the first supporting lug 104, the second threaded rod 4 is placed in the second supporting lug 201, then the limiting nut 301 is used for abutting the first supporting lug 104 and the second supporting lug 201, so that the first threaded rod 3 and the second threaded rod 4 are fixed and are connected more stably, the second threaded rod 4 is provided with the circular groove 401, the second threaded rod 4 can be conveniently placed in the clamping groove 206, then the first knob 303 and the second knob 402 can be rotated according to the length of the end tube 1, so that the position between the first knob 303 and the second knob 402 can be adjusted, then the second spring 403 can ensure that the connection is more stable, and simultaneously has certain damping and buffering effects, the damage of the end tube 1 caused by over-high bearing pressure can be avoided, meanwhile, the limiting rod 404 slides in the air tube 404, so that the piston 405 presses the air in the air tube 6, and the air enters the air bag 603 through the second one-way valve 602 and the first connecting tube 601, then the air bag 603 is expanded to abut against the corrugated pipe body 103, so that the connection of the corrugated pipe body 103 is more stable, the shock absorption can be carried out on the corrugated pipe body 103, the damage caused by the stress of the corrugated pipe body is avoided, in the process that the third spring 406 automatically resets, the external air can be pumped through the pipeline 407, so that the air cylinder 6 is inflated, the air can enter the air cylinder 6 through the first one-way valve 408, the air in the air cylinder 6 can not flow out of the first one-way valve 408 when compressed by the piston 405, the air can not flow back after entering the air bag 603 through the second one-way valve 602, the air bag 603 is provided with an air release valve on the outer wall, when the air in the air bag 603 is too much, the air bag can be decompressed, so that the air bag is convenient to use, the third spring 406 can support and absorb the shock of the limiting rod 404, so that the connection effect of the limiting rod 404 is better, and the connection of the first threaded rod, convenient to use, then rotate first dead lever 501, make it slide in annular groove 304 under the effect of first slider 5, then press and move second dead lever 502, make it drive second slider 503 compression fourth spring 504, thereby make second dead lever 502 slide to the recess on first dead lever 501 in, then make second dead lever 502 correspond with the position of shrinkage pool 302 on the stop nut 301, make second dead lever 502 insert in the shrinkage pool 302, thereby make the position fixation of first knob 303 and second knob 402, thereby make the distance between first threaded rod 3 and the second threaded rod 4 after the adjustment fixed, facilitate the use.

Example 2:

referring to fig. 1-9, a bellows expansion joint comprises an end pipe 1, wherein a first flange 101 and a second flange 102 are respectively arranged on the outer walls of two sides of the end pipe 1, two annular plates 2 are connected to the outer wall of the middle of the end pipe 1, and a bellows body 103 is respectively connected between the first flange 101 and the annular plates 2 and between the second flange 102 and the annular plates 2;

The two annular plates 2 are connected with a sliding rod 202 in a sliding mode, the outer walls of the sliding rod 202 are respectively in threaded connection with a first fixing nut 203 and a second fixing nut 204, the first fixing nut 203 and the second fixing nut 204 are respectively abutted to the two annular plates 2, the outer wall of the sliding rod 202 is sleeved with a first spring 205, and the first spring 205 is connected between the two annular plates 2.

In the invention, the first fixing nut 203 and the second fixing nut 204 are respectively abutted against the outer walls of the two annular plates 2 by rotating, so that the distance between the two annular plates 2 is adjusted, and the first spring 205 can be abutted against the two annular plates 2, so that the two annular plates 2 have certain buffering effect while being fixed in position.

Example 3:

referring to fig. 1 to 9, a bellows expansion joint is substantially the same as that of embodiment 1, and further, three sets of first support lugs 104 and second support lugs 201 are provided, and three sets of first support lugs 104 and second support lugs 201 are provided with first threaded rods 3 and second threaded rods 4, respectively, and by providing three sets of first threaded rods 3 and second threaded rods 4, the bellows expansion joint can be stressed more uniformly, and can have triangular stability and more material and space saving.

Example 4:

referring to fig. 10, a bellows, the bellows body 103 is made of stainless steel material, so that it can bear a large pressure and the connection is more stable without damage.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The corrugated pipe expansion joint comprises an end pipe (1), and is characterized in that the outer walls of two sides of the end pipe (1) are respectively provided with a first flange (101) and a second flange (102), the outer wall of the middle part of the end pipe (1) is sleeved with two annular plates (2), corrugated pipe bodies (103) are sleeved between the first flange (101) and the annular plates (2) and between the second flange (102) and the annular plates (2), and the outer wall of the end pipe (1) is also provided with an air bag (603) matched with the corrugated pipe bodies (103);

the first flange plate (101) and the second flange plate (102) are fixedly connected with first supporting lugs (104), the outer walls of the two annular plates (2) are connected with second supporting lugs (201) corresponding to the first supporting lugs (104), the first supporting lugs (104) are connected with first threaded rods (3), the second supporting lugs (201) are connected with second threaded rods (4), limiting rods (404) are further arranged on the first threaded rods (3), and the limiting rods (404) are connected to the second threaded rods (4) in a sliding mode;

the outer walls of the first threaded rod (3) and the second threaded rod (4) are respectively in threaded connection with a first knob (303) and a second knob (402), a second spring (403) is arranged between the first knob (303) and the second knob (402), and fixing components are arranged on the first knob (303) and the second knob (402).

2. The expansion joint of the corrugated pipe as claimed in claim 1, wherein the second threaded rod (4) is provided with an annular groove (401), the second supporting lug (201) is provided with a clamping groove (206), the second threaded rod (4) is connected in the clamping groove (206) through the annular groove (401), and the second spring (403) is sleeved on the outer walls of the first threaded rod (3), the second threaded rod (4) and the limiting rod (404).

3. The bellows expansion joint according to claim 2, wherein an air cylinder (6) is arranged on the second threaded rod (4), the limit rod (404) is inserted into the air cylinder (6), a piston (405) matched with the limit rod (404) is slidably connected in the air cylinder (6), a third spring (406) is arranged between the piston (405) and the inner wall of the air cylinder (6), a first connecting pipe (601) communicated with the air cylinder (6) is arranged at one end of the second threaded rod (4) arranged on the outer wall of the second supporting lug (201), one end of the first connecting pipe (601) far away from the air cylinder (6) is communicated with the air bags (603), a plurality of the air bags (603) are arranged, the air bags (603) are distributed in a circumferential manner, and a second connecting pipe (604) is connected between the air bags (603).

4. A bellows expansion joint according to claim 3, wherein the stop rod (404) is provided with a conduit (407) communicating with the gas cylinder (6), the conduit (407) is provided with a first check valve (408), and the inner wall of the bottom of the gas cylinder (6) is provided with a second check valve (602).

5. Bellows expansion joint according to claim 4, wherein the fixation assembly essentially comprises a first fixation rod (501) and a second fixation rod (502), the second fixation rod (502) being slidably connected within the first fixation rod (501), the first knob (303) and the second knob (402) each being provided with an annular groove (304), the first fixation rod (501) being slidably connected within the annular groove (304).

6. A bellows expansion joint according to claim 5, wherein a first sliding block (5) is slidably connected in the annular groove (304), the first fixing rod (501) is fixedly connected to the top outer wall of the first sliding block (5), a groove is formed in the first fixing rod (501), a second sliding block (503) is slidably connected in the groove, the second fixing rod (502) is fixedly connected to the top outer wall of the second sliding block (503), and a fourth spring (504) is further arranged between the second sliding block (503) and the inner wall of the groove.

7. The expansion joint of the corrugated pipe as claimed in claim 6, wherein the outer walls of the first threaded rod (3) and the second threaded rod (4) are both connected with a limit nut (301) in a threaded manner, a concave hole (302) matched with the second fixing rod (502) is formed in the limit nut (301), and the limit nut (301) abuts against the outer walls of the first support lug (104) and the second support lug (201) respectively.

8. The expansion joint of corrugated pipe as claimed in claim 1, wherein a sliding rod (202) is slidably connected to both of the two annular plates (2), the outer wall of the sliding rod (202) is respectively in threaded connection with a first fixing nut (203) and a second fixing nut (204), the first fixing nut (203) and the second fixing nut (204) respectively abut against the two annular plates (2), the outer wall of the sliding rod (202) is sleeved with a first spring (205), and the first spring (205) is connected between the two annular plates (2).

9. A bellows expansion joint according to claim 6, wherein the first and second support lugs (104, 201) are provided in three sets, and the first and second support lugs (104, 201) of the three sets are provided with the first and second threaded rods (3, 4), respectively.

10. A bellows comprising a bellows expansion joint according to any one of claims 1-9, wherein the bellows body (103) is made of a stainless steel material.