CN210800411U

CN210800411U - Bent pipe pressure balance type metal corrugated expansion joint

Info

Publication number: CN210800411U
Application number: CN201921342460.7U
Authority: CN
Inventors: 李敏
Original assignee: Chongqing Minte Metal Products Co ltd
Current assignee: Chongqing Minte Metal Products Co ltd
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2020-06-19
Anticipated expiration: 2029-08-19

Abstract

The utility model discloses a bent pipe pressure balance type metal ripple expansion joint, including first takeover, the welding of first takeover lateral wall has the inside return bend of intercommunication, first takeover one end is equipped with the expansion joint group of two series connection settings in proper order, the expansion joint group is taken over including the second, and the second takeover both ends all weld and have first bellows, and one of them first bellows one end and first takeover one end welding, and the second takeover one end welding has the third to take over is kept away from to another first bellows, the expansion joint group one end welding has the second bellows to be kept away from to first takeover, and the second bellows keeps away from first takeover one end welding and has the blind pipe. The utility model discloses can promote the antidetonation effect of expansion joint, combine the pressure transmitter who sets up simultaneously, fluid pressure in the convenient detection pipeline detects the pressure in the twinkling of an eye among the vibration process, and the working condition of better understanding expansion joint is convenient in time overhauld and is maintained.

Description

Bent pipe pressure balance type metal corrugated expansion joint

Technical Field

The utility model relates to an expansion joint technical field especially relates to a bent pipe pressure balance type metal ripple expansion joint.

Background

An expansion joint refers to a flexible element that effectively functions to compensate for axial deformation. For example, the expansion joint welded on the shell of the fixed tube-plate heat exchanger has large axial flexibility and easy deformation, can compensate the thermal expansion difference generated by the tube and the shell due to different wall temperatures, and reduces the axial load of the tube and the shell, thereby reducing the temperature difference stress of the tube, the tube plate and the shell and avoiding causing strength damage, instability damage and tube pull-out damage. The expansion joint has many kinds, and the common structures include wave, ring plate welding, clamping shell type and the like, wherein the wave expansion joint is most widely applied, and the ring plate welding expansion joint is only suitable for normal pressure or low pressure occasions.

The existing expansion joint is inconvenient to detect the working condition of the expansion joint, and the damping effect is general, so that the bent pipe pressure balance type metal corrugated expansion joint is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a bent pipe pressure balance type metal corrugated expansion joint.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a bent pipe pressure balance type metal corrugated expansion joint comprises a first connecting pipe, wherein a bent pipe communicated with the first connecting pipe is welded on the side wall of the first connecting pipe, one end of the first connecting pipe is sequentially provided with two expansion joint groups arranged in series, each expansion joint group comprises a second connecting pipe, first corrugated pipes are welded at two ends of each second connecting pipe, one end of each first corrugated pipe is welded with one end of the first connecting pipe, the other first corrugated pipe is welded at the end far away from the second connecting pipe, a third connecting pipe is welded at the end far away from the second connecting pipe, a second corrugated pipe is welded at the end far away from the expansion joint groups, a blind pipe is welded at the end far away from the first connecting pipe, the second connecting pipe is connected with the first connecting pipe and the third connecting pipe and the first connecting pipe and the blind pipe through pull rod assemblies distributed equidistantly, two guide sleeves are sleeved on the inner walls of the first corrugated pipes, and expansion parts are arranged at the ends, the inner wall of the second corrugated pipe is spliced with a metal cylinder, one end of the metal cylinder is spliced with the inner wall of the blind pipe, one end, far away from the blind pipe, of the metal cylinder is of an open structure, one end of the blind pipe is provided with a pressure detection assembly, and one end of the pressure detection assembly is connected with one end of the metal cylinder.

Preferably, the pressure detection assembly comprises a sleeve inserted at the end of the blind pipe, a cross rod is inserted on the inner wall of the sleeve, the outer wall of the cross rod is sleeved with a spring part, and one end of the cross rod is in threaded connection with one end of the metal cylinder.

Preferably, one end of the sleeve is in threaded connection with a plug cover, and the inner wall of the plug cover is in threaded connection with a pressure transmitter.

Preferably, the lateral wall of the cross rod is provided with an annular groove, and the inner wall of the annular groove is clamped with a sealing ring.

Preferably, the pull rod assembly comprises a pull rod, connecting blocks are inserted into two ends of the pull rod, and the connecting blocks are welded and fixed with the side walls of the first connecting pipe, the second connecting pipe, the third connecting pipe or the blind pipe.

The utility model has the advantages that:

through the metal cylinder that sets up, the spring part that the cooperation set up can promote the antidetonation effect of expansion joint, combines the pressure transmitter who sets up simultaneously, fluid pressure in the convenient detection pipeline, and pressure in the twinkling of an eye among the detection vibration process, the working condition of better understanding expansion joint makes things convenient for in time to overhaul the maintenance.

Drawings

Fig. 1 is a schematic cross-sectional structural view of a crankshaft pressure balanced metal bellows expansion joint according to the present invention;

fig. 2 is a partially enlarged schematic view of fig. 1.

In the figure: the pressure transmitter comprises a cross rod 1, a spring piece 2, a first connecting pipe 3, an expanding part 4, a first corrugated pipe 5, a flow guide sleeve 6, a second connecting pipe 7, a pull rod 8, a connecting block 9, a third connecting pipe 10, an elbow pipe 11, a metal cylinder 12, a second corrugated pipe 13, a blind pipe 14, a sleeve 15, a blocking cover 16 and a pressure transmitter 17.

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.

Referring to fig. 1-2, a bent pipe pressure balance type metal corrugated expansion joint comprises a first connecting pipe 3, a bent pipe 11 communicated with the inside of the first connecting pipe 3 is welded on the side wall of the first connecting pipe 3, two expansion joint groups arranged in series are sequentially arranged at one end of the first connecting pipe 3, each expansion joint group comprises a second connecting pipe 7, first corrugated pipes 5 are welded at two ends of each second connecting pipe 7, one end of each first corrugated pipe 5 is welded with one end of the first connecting pipe 3, the other end, far away from the second connecting pipe 7, of the first corrugated pipe 5 is welded with a third connecting pipe 10, one end, far away from the expansion joint group, of the first connecting pipe 3 is welded with a second corrugated pipe 13, one end, far away from the first connecting pipe 3, of the second corrugated pipe 13 is welded with a blind pipe 14, the second connecting pipe 7 is connected with the first connecting pipe 3 and the third connecting pipe 10 and the first connecting pipe 3 and the blind pipe 14 through pull rod, and two flow guide sleeves 6 are close to the one end of first takeover 3 and all are equipped with expansion portion 4, and the inner wall of second bellows 13 is pegged graft and is had a metal section of thick bamboo 12, and metal section of thick bamboo 12 one end is pegged graft with the inner wall of blind pipe 14, and metal section of thick bamboo 12 keeps away from the one end of blind pipe 14 and be open structure, and blind pipe 14 one end is equipped with the pressure measurement subassembly, and pressure measurement subassembly one end is connected with metal section of thick bamboo 12 one end.

The utility model discloses in, the pressure detection subassembly is including pegging graft sleeve 15 in 14 tip position departments of blind pipe, and the grafting of sleeve 15 inner wall has horizontal pole 1, spring part 2 has been cup jointed to 1 outer wall of horizontal pole, and 1 one end of horizontal pole and 12 one end spiro unions of metal cylinder, sleeve 15 one end spiro union has blanking

cover

16, and 16 inner wall spiro unions of blanking cover have pressure transmitter 17, 1 lateral wall of horizontal pole is opened has the annular groove, and the annular groove inner wall joint has the sealing washer, the pull rod subassembly includes pull rod 8, and 8 both ends of pull rod are all pegged graft and are had connecting block 9, 7 or the third is taken over 10 or 14 lateral walls welded fastening of blind pipe are taken over to connecting block 9 and first takeover.

The working principle is as follows: through the third takeover 10 and the return bend 11 that set up, with the fixed suitable pipeline that sets up of expansion joint, metal cylinder 12 is under horizontal pole 1 and spring part 2 effect, under the fluid impact effect, absorb vibration energy through spring part 2 deformation, can promote the antidetonation effect of expansion joint, combine the pressure transmitter 17 that sets up simultaneously, fluid pressure in the convenient detection pipeline, detect pressure in the twinkling of an eye among the vibration process, the working condition of better understanding expansion joint, the convenient maintenance of in time overhauing.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a bent pipe pressure balance type corrugated metal expansion joint, includes first takeover (3), a serial communication port, the welding of first takeover (3) lateral wall has inside return bend (11) of intercommunication, first takeover (3) one end is equipped with the expansion joint group that two series connection set up in proper order, expansion joint group is taken over (7) including the second, and the second takeover (7) both ends all weld first bellows (5), and one of them first bellows (5) one end and first takeover (3) one end welding, and the welding of second takeover (7) one end is kept away from in other one first bellows (5) has third takeover (10), expansion joint group one end welding is kept away from in first takeover (3) and second bellows (13) has second bellows (13), and the welding of first takeover (3) one end has blind pipe (14), between second takeover (7) and first takeover (3) and third takeover (10) and first takeover (3) and blind pipe (14) and the second takeover (7) and first takeover (3) and connect, two through equidistant draw bar assembly who distributes between first bellows (5) inner wall all overlaps and is equipped with water conservancy diversion cover (6), and just two water conservancy diversion covers (6) are close to first takeover (3) one end and all are equipped with expansion portion (4), second bellows (13) inner wall is pegged graft and is had metal section of thick bamboo (12), metal section of thick bamboo (12) one end is pegged graft with blind pipe (14) inner wall, and metal section of thick bamboo (12) keep away from blind pipe (14) one end and be open structure, blind pipe (14) one end is equipped with the pressure measurement subassembly, and pressure measurement subassembly one end is connected with metal section of thick bamboo (12) one end.

2. The bent pipe pressure balance type metal corrugated expansion joint as claimed in claim 1, wherein the pressure detection assembly comprises a sleeve (15) inserted at the end position of the blind pipe (14), a cross rod (1) is inserted at the inner wall of the sleeve (15), the spring member (2) is sleeved on the outer wall of the cross rod (1), and one end of the cross rod (1) is in threaded connection with one end of the metal cylinder (12).

3. A bent pipe pressure balance type metal corrugated expansion joint according to claim 2, characterized in that a plug (16) is screwed at one end of the sleeve (15), and a pressure transmitter (17) is screwed at the inner wall of the plug (16).

4. The bent pipe pressure balance type metal corrugated expansion joint as claimed in claim 3, wherein the side wall of the cross rod (1) is provided with an annular groove, and the inner wall of the annular groove is clamped with a sealing ring.

5. A bent pipe pressure balance type metal corrugated expansion joint according to claim 4, wherein the pull rod assembly comprises a pull rod (8), connecting blocks (9) are inserted into two ends of the pull rod (8), and the connecting blocks (9) are welded and fixed with the side walls of the first connecting pipe (3), the second connecting pipe (7), the third connecting pipe (10) or the blind pipe (14).