CN212430134U - Bellows expansion joint with shock resistance and vibration reduction functions - Google Patents

Abstract

A corrugated pipe expansion joint with shock resistance and vibration reduction functions comprises a bent pipe pressure balance type expansion joint and a shock resistance and vibration reduction device, wherein the bent pipe pressure balance type expansion joint comprises a corrugated pipe assembly, a three-way assembly, a pull rod assembly, a three-way assembly and a corrugated pipe assembly to form an expansion joint main body, the outside of the expansion joint main body is provided with the pull rod assembly for supporting, at least two shock resistance and vibration reduction devices are respectively used at the outer sides of the corrugated pipe assemblies at two sides of the three-way assembly, each shock resistance and vibration reduction device comprises a shock resistance and vibration reduction cylinder and a liquid storage cylinder, an annular sealing space is formed between each vibration reduction cylinder and the corresponding corrugated pipe assembly and is communicated with the corresponding liquid storage cylinder through a connecting pipe, filling liquid is filled in the annular sealing cavity, the shock resistance and vibration reduction device with shock resistance and displacement resistance is added relative to, the vibration damping capacity is enhanced, and the functionality, safety and reliability of the expansion joint under severe working condition environments are enhanced.

Description

Bellows expansion joint with shock resistance and vibration reduction functions

Technical Field

The utility model relates to an expansion joint technical field, what specifically say so is a bellows expansion joint with shock resistance and damping function.

Background

The expansion joint of the corrugated pipe is an important accessory commonly used in a pipeline system, can be freely extended, compressed and bent due to flexibility and has certain pressure bearing capacity, so that the expansion joint of the corrugated pipe is widely applied to the pipeline system and used for compensating deformation caused by expansion and contraction with heat, foundation settlement, relative movement of equipment and the like, thereby reducing pipeline stress and improving the sealing property of a joint. The introduction of the expansion joint of the corrugated pipe increases the flexibility of the pipeline system, and the safe operation of the system can be ensured only by arranging a corresponding pipeline support.

Under the operating mode such as valve emergency switch or power failure suddenly, pipe-line system can receive water hammer (air hammer) impact force, because of bellows expansion joint has increased pipe-line system's compliance, the pipeline can take place to strike displacement equipment security and can receive the harm. As shown in fig. 1, when the valve is suddenly opened or closed, the elbow of the expansion joint of the corrugated pipe bears the impact force of a water hammer (air hammer), the third equipment can form a fixed supporting point, but the third equipment is far away from the impact force action point, the cantilever is long and weak in constraint, and the second equipment on the 7 elastic support is subjected to impact displacement under the action of the impact force, so that potential hazards are caused to the safe operation of the third equipment.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a bellows expansion joint with shock resistance and damping function can provide instantaneous big damping force, conducts the impact force to the fixed bolster, restraint impact displacement, protective apparatus safety.

In order to realize the technical purpose, the adopted technical scheme is as follows: a corrugated pipe expansion joint with shock resistance and vibration reduction functions comprises a bent pipe pressure balance type expansion joint and a shock resistance and vibration reduction device, wherein the bent pipe pressure balance type expansion joint comprises a corrugated pipe assembly, a three-way assembly and a pull rod assembly, two ports of the three-way assembly are respectively connected with at least one group of corrugated pipe assemblies, the three-way assembly and the corrugated pipe assemblies form an expansion joint main body, one end of the expansion joint main body is sealed by a sealing head, the other end of the expansion joint main body is provided with an opening, the pull rod assembly for supporting is arranged outside the expansion joint main body, at least two shock resistance and vibration reduction devices are respectively used outside the corrugated pipe assemblies on two sides of the three-way assembly, each shock resistance and vibration reduction device comprises a shock resistance and vibration reduction cylinder and a liquid storage cylinder, each shock resistance and vibration reduction cylinder is a shell formed by a corrugated, the annular sealing space is communicated with the liquid storage cylinder through a connecting pipe, filling liquid is filled in the annular sealing cavity, the annular sealing space is filled with the filling liquid, and a part of filling liquid is also stored in the liquid storage cylinder.

The filling liquid is a non-Newtonian fluid.

The utility model has the advantages that: the utility model relates to a bellows expansion joint with shock resistance and damping function, relative return bend pressure balance type expansion joint increase the damping device that shocks resistance that has the displacement function of shocking resistance, have strengthened the vibration damping characteristic through the device simultaneously, have reinforceed the damping ability, have strengthened the functional and fail safe nature of expansion joint under the harsh operating mode environment.

Drawings

FIG. 1 is a schematic view of a piping system;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic view of the elbow pressure balanced expansion joint of FIG. 2;

fig. 4 is another schematic structural diagram of the present invention;

FIG. 5 is a schematic view of the elbow pressure balanced expansion joint of FIG. 4;

in the figure: 1. a pressure balance type expansion joint of the elbow; 2. an end ring I; 3. an outer working bellows; 4. filling liquid; 5. a second end ring; 6. a connecting pipe; 7. a liquid storage cylinder; 8. an outer balance bellows; 9. a first device; 10. a first pipe section; 11. a valve; 12. a bellows expansion joint; 13. a second pipe section; 14. a second device; 15. elastic support; 16. a pipe section III; 17. equipment III; 18. an outer intermediate tube; 1-1, working wave end pipe; 1-2 end pipe ring plates; 1-3, a nut; 1-4. a conical washer; 1-5 spherical washers; 1-6, working corrugated pipe; 1-7, a tee joint component; 1-8, a pull rod; 1-9, balancing the corrugated pipe; 1-10, balancing the wave end tube; 1-11. sealing head; 1-12, intermediate pipe.

Detailed Description

A corrugated pipe expansion joint with shock resistance and vibration reduction functions comprises a bent pipe pressure balance type expansion joint and shock resistance vibration reduction devices, wherein the bent pipe pressure balance type expansion joint comprises a corrugated pipe assembly, a three-way assembly and a pull rod assembly, two ports of the three-way assembly are respectively connected with at least one group of corrugated pipe assemblies, the corrugated pipe assemblies can be single waves or double waves, three waves and the like which are connected in series, the three-way assembly and the corrugated pipe assemblies form an expansion joint main body, one end of the expansion joint main body is sealed by a sealing head, the other end of the expansion joint main body is provided with an opening, the pull rod assemblies used for supporting are arranged outside the expansion joint main body, the pull rod assemblies are provided with a plurality of groups and are distributed along the circumferential direction of the expansion joint main body, the optimal distribution mode is uniform distribution, at least two shock resistance vibration reduction devices are respectively used outside the corrugated pipe assemblies on, the shock-resistant vibration damper comprises a shock-resistant vibration damping cylinder and a liquid storage cylinder, wherein the shock-resistant vibration damping cylinder is a shell formed by a corrugated pipe and an end ring and wraps the outer side of a corrugated pipe assembly, an annular sealing space is formed between the vibration damping cylinder and the corrugated pipe assembly and is communicated with the liquid storage cylinder through a connecting pipe, filling liquid is filled in an annular sealing cavity, the annular sealing space is filled with the filling liquid, and a part of filling liquid is also stored in the liquid storage cylinder.

Example 1

As shown in figure 2, the bellows expansion joint with the functions of impact resistance and vibration reduction comprises a bend pressure balance type expansion joint 1 and a newly added impact resistance vibration reduction device, wherein the impact resistance vibration reduction device comprises a first end ring 2, an outer working bellows 3, filling liquid 4, a second end ring 5, a connecting pipe 6, a liquid storage cylinder 7 and an outer balance bellows 8, as shown in figure 3, the bend pressure balance type expansion joint 1 comprises a working wave end pipe 1-1, an end pipe ring plate 1-2, a nut 1-3, a conical surface gasket 1-4, a spherical surface gasket 1-5, a working bellows 1-6, a three-way component 1-7, a pull rod 1-8, a balance bellows 1-9, a balance wave end pipe 1-10 and a seal head 1-11.

The connection of the elbow pressure balance type expansion joint 1: one end of a working corrugated pipe 1-6 is welded with an end ring 1-1 of the working corrugated pipe, the other end of the working corrugated pipe is welded with a tee joint component 1-7, one end of a balance corrugated pipe 1-9 is welded with the tee joint component 1-7, the other end of the balance corrugated pipe is welded with a balance wave end pipe 1-10, the balance wave end pipe 1-10 is welded with an end socket 1-11, an end pipe annular plate 1-2 is respectively sleeved into the working wave end pipe 1-1 and the balance wave end pipe 1-10 and is connected with the balance wave end pipe in a welding mode, a pull rod 1-8 penetrates through a through hole formed in an end pipe annular plate 1-2 connected with the working wave end pipe 1-1 and the balance wave end pipe 1-10, and two ends of the pull rod 1-8 are fastened and connected through a spherical.

And (3) connecting the impact-resistant vibration damper: one end of the outer working corrugated pipe 3 is connected with the first end ring 2 in a welding mode, the other end of the outer working corrugated pipe is connected with the second end ring 5, the first end ring 2 is sleeved on the outer side of the working corrugated pipe 1-1 and welded on the outer surface, and the second end ring 5 is sleeved on the tee joint component 1-7 and welded on the outer surface. The connecting pipe 6 is of a hollow structure, one end of the connecting pipe is connected with a small-size through hole formed in the end ring II 5, and the other end of the connecting pipe is connected with a small-size through hole formed in the liquid storage cylinder 7. The liquid storage cylinder 7 is of a hollow structure and is sealed at the periphery. The end ring I2, the outer working corrugated pipe 3, the end ring II 5, the connecting pipe 6, the liquid storage cylinder 7 and the working corrugated pipes 1-6 form an annular closed space, filling liquid 4 is filled in the annular closed space, the filling amount ensures that the end ring I2, the outer working corrugated pipe 3, the end ring II 5, the connecting pipe 6 and the working corrugated pipes 1-6 form a closed space, and the closed space in the liquid storage cylinder 7 is filled partially. The filling liquid 4 is a non-Newtonian fluid, the damping characteristic of the filling liquid is related to the external impulse, the damping characteristic is more obvious when the external movement impulse is larger, and the resistance characteristic is weakened when the filling liquid moves at low speed.

The working principle is as follows:

1) under the impact working condition, the principle of impact displacement resistance is as follows: when the valve of the pipeline system is suddenly opened or closed, the impact force of the water hammer (air hammer) of the medium acts on the three-way component 1-7. The filling liquid 4 is a non-Newtonian fluid, namely a fluid of which the shear stress and the shear strain rate are not in a linear relation, and provides a larger damping force instantly under the impact working condition. Under the impact working condition, filling liquid 4 is difficult to enter a liquid storage cylinder 7 through a connecting pipe 6 by forming a through hole on an end ring II 5, the rigidity of the corrugated pipes (the working corrugated pipes 1-6, the balance corrugated pipes 1-9, the outer working corrugated pipe 3 and the balance corrugated pipe 8) is greatly increased by large damping force provided by non-Newtonian fluid, so that the pipelines form rigid connection, the impact force is effectively transmitted to a fixed supporting point, the effective restraint of impact displacement is realized, and the safety of equipment is protected.

2) Normal compensation displacement operating mode, displacement compensation principle: when the pipeline slowly expands with heat and contracts with cold due to medium temperature rise or temperature drop, the expansion joint corrugated pipes (the working corrugated pipes 1-6, the balance corrugated pipes 1-9, the outer working corrugated pipe 3 and the balance corrugated pipe 8) are compressed, stretched or transversely displaced, and the displacement rate is low. The end ring I2, the outer working corrugated pipe 3, the end ring II 5 and the working corrugated pipes 1-6 form a filling liquid 4 in a closed space, and the filling liquid can smoothly enter or flow out of the liquid storage cylinder 7 through the connecting pipe 6 by opening a through hole on the end ring II 5. The filling liquid 4 in the closed space formed by the end ring I2, the outer balance corrugated pipe 8, the end ring II 5 and the balance corrugated pipes 1-9 can also smoothly enter or flow out of the liquid storage cylinder 7 through the connecting pipe 6 by opening a through hole on the end ring II 5, and the deformation of the expansion joint is not hindered.

3) Under the vibration working condition, the vibration reduction principle is as follows: when the pipeline system vibrates, the corrugated pipes (the working corrugated pipes 1-6, the balance corrugated pipes 1-9, the outer working corrugated pipe 3 and the balance corrugated pipe 8) can generate small-amplitude circular displacement motion, and the filling liquid 4 can play a role in damping performance, absorbing energy and dissipating energy, and reducing the transmission of vibration along the pipeline.

Example 2

As shown in fig. 4 and 5, the general structure of the present embodiment is identical to that of embodiment 1, except that the left bellows assembly of the elbow pressure balance type expansion joint is composed of working bellows in series with intermediate pipes 1 to 12, and the shock-resistant damper cylinder on the left side is composed of an outer working bellows 3, an outer intermediate pipe 18, an end ring one 2, and an end ring two 5. The two outer working corrugated pipes 3 are connected in series by an outer middle pipe 18, the left outer working corrugated pipe 3 is welded and sealed on the working corrugated end pipe 1-1 through an end ring I2, and the right outer working corrugated pipe 3 is welded and sealed on the three-way assembly through an end ring II 5.

Claims (2)

1. The utility model provides a bellows expansion joint with shock resistance and damping function, includes return bend pressure balance type expansion joint and shock absorber that shocks resistance, return bend pressure balance type expansion joint includes bellows subassembly, tee bend subassembly and draw bar assembly, and at least a set of bellows subassembly is connected respectively to two ports of tee bend subassembly, and an expansion joint main part is constituteed to tee bend subassembly and bellows subassembly, and the one end of expansion joint main part is sealed by the head, and the other end is the opening, has the draw bar assembly who is used for the support at the externally mounted of expansion joint main part, its characterized in that: at least two less shock-resistant vibration dampers are respectively used on the outer sides of the corrugated pipe assemblies on the two sides of the three-way assembly, each shock-resistant vibration damper comprises a shock-resistant vibration damping cylinder and a liquid storage cylinder, each shock-resistant vibration damping cylinder is a shell formed by a corrugated pipe and an end ring, the shock-resistant vibration damping cylinders are wrapped on the outer sides of the corrugated pipe assemblies, an annular sealing space is formed between each vibration damping cylinder and each corrugated pipe assembly, the annular sealing space is communicated with the liquid storage cylinders through connecting pipes, filling liquid is filled in the annular sealing cavities, and the annular sealing space is filled with the filling liquid and part of the filling liquid is stored in.

2. A bellows expansion joint having impact resistance and vibration damping according to claim 1, wherein: the filling liquid is a non-Newtonian fluid.

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