CN212272919U

CN212272919U - Hydraulic damper for pipeline

Info

Publication number: CN212272919U
Application number: CN202022131535.6U
Authority: CN
Inventors: 杨德生; 陈光辉; 刘伟伟
Original assignee: Shandong Jianeng Technology Co ltd
Current assignee: Shandong Jianeng Technology Co ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-01-01
Anticipated expiration: 2030-09-24

Abstract

The utility model belongs to the technical field of dampers, and relates to a hydraulic damper for pipelines, which comprises a main oil cylinder mechanism and an auxiliary oil cylinder mechanism, wherein an intermediate connector is arranged between the main oil cylinder mechanism and the auxiliary oil cylinder mechanism; the main oil cylinder mechanism comprises a main oil cylinder barrel and a piston rod, one end of the main oil cylinder barrel is fixedly connected with one end of the middle connecting body, one end of the piston rod is connected with a main piston assembly arranged in the main oil cylinder barrel, the other end of the piston rod penetrates through an end cover of the main oil cylinder, a first locking control valve is arranged in the main piston assembly, and the first locking control valve is communicated with a first oil guide hole formed in the piston rod; one end of the auxiliary oil cylinder barrel is fixedly connected with the other end of the intermediate connector, the intermediate connector is communicated with the auxiliary oil cylinder barrel and the main oil cylinder barrel, and one end of the intermediate connector is provided with a second locking control valve. The utility model adopts direct connection type arrangement, the hydraulic oil circuit is simple and smooth, and the stability under the working state is improved; the raw materials are saved, the production cost is reduced, and the production and processing difficulty of parts is reduced.

Description

Hydraulic damper for pipeline

Technical Field

The utility model relates to a hydraulic damper for pipeline belongs to attenuator technical field.

Background

The hydraulic damper is mainly used in the infrastructure of petrochemical pipeline devices, and plays an irreplaceable important role in vibration reduction and vibration resistance and safety protection. The hydraulic damper is a vibration control device sensitive to speed, can slowly move along with the pipeline or equipment when the pipeline or the equipment is expanded and deformed normally, almost has no damping force at the moment, and when load transient occurs, a locking control valve of the hydraulic damper is activated, and then the locking control valve generates counter resistance with the same magnitude as the vibration force, so that the pipeline or the equipment is restrained to generate larger vibration or displacement, the amplitude is reduced, and the effect of protecting the pipeline or the equipment is achieved. The main oil cylinder and the auxiliary oil cylinder of the existing hydraulic damper are arranged in parallel and in a transverse manner, the diameter of the cylinder barrel of the auxiliary oil cylinder is large, the material consumption is high, and the processing difficulty is relatively high; and the hydraulic oil circuit is easy to appear unsmoothly, influences the overall stability of attenuator.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the hydraulic damper for the pipeline overcomes the defects of the prior art, the main oil cylinder mechanism and the auxiliary oil cylinder mechanism of the hydraulic damper for the pipeline are arranged in a direct connection mode, the diameter of a cylinder barrel of the auxiliary oil cylinder is reduced, raw materials are saved, the production cost is reduced, and meanwhile, the production and processing difficulty of parts is reduced; the hydraulic oil way is simple and smooth, and the stability of the working state is improved.

The utility model discloses a hydraulic damper for pipelines, which comprises a main oil cylinder mechanism and an auxiliary oil cylinder mechanism, wherein the main oil cylinder mechanism and the auxiliary oil cylinder mechanism are respectively connected with a joint bearing, and an intermediate connector is arranged between the main oil cylinder mechanism and the auxiliary oil cylinder mechanism; the main oil cylinder mechanism comprises a main oil cylinder barrel and a piston rod, one end of the main oil cylinder barrel is fixedly connected with one end of the middle connector, the other end of the main oil cylinder barrel is fixedly provided with a main oil cylinder end cover, one end of the piston rod is connected with a main piston assembly arranged in the main oil cylinder barrel, the other end of the piston rod penetrates through the main oil cylinder end cover, a first locking control valve is arranged at the joint of the main piston assembly and the piston rod, the first locking control valve is communicated with one end of a first oil guide hole arranged on the piston rod, and the other end of the first oil guide hole is communicated with a cavity between the; one end of an auxiliary oil cylinder barrel of the auxiliary oil cylinder mechanism is fixedly connected with the other end of the middle connector, the middle connector is communicated with the auxiliary oil cylinder barrel and the main oil cylinder barrel, and one end of the middle connector is provided with a second locking control valve; the auxiliary oil cylinder barrel is coaxial with the main oil cylinder barrel.

The damper is respectively connected with the pipeline connecting rods at two sides of the damper through the joint bearing, when a pipeline or equipment is in normal expansion deformation, the locking control valve I and the locking control valve II are in an unlocked state, the relative positions of the main oil cylinder mechanism and the auxiliary oil cylinder mechanism can change along with the normal expansion deformation, and at the moment, the damping force is very small and almost no; when the load is transient, the piston rod drives the main piston assembly to move instantly, and the locking control valve I and the locking control valve II are in a locking state instantly, so that the pipeline is prevented from being deformed greatly, the pipeline is protected, and loss is reduced; when the sudden load is gradually reduced, the first locking control valve and the second locking control valve are gradually released from the locking state, and the external force is gradually unloaded.

Preferably, the master cylinder mechanism further comprises a master cylinder outer cover, the master cylinder outer cover is sleeved on the periphery of a master cylinder barrel at one end of the master cylinder end cover, and the master cylinder outer cover is fixedly connected with one end of a piston rod penetrating through the master cylinder end cover through threads; the outer surface of the cylinder barrel of the main oil cylinder is marked with scales. In the using process, the position of the main piston assembly can be judged by judging the scale corresponding to the outer cover of the main oil cylinder; when the main piston assembly is installed in an initial state, the main piston assembly is generally arranged in the middle of the cylinder barrel of the main oil cylinder, and the initial installation of the main piston assembly is facilitated due to the arrangement of the outer cover of the main oil cylinder and the scales.

Preferably, the auxiliary oil cylinder mechanism further comprises an auxiliary oil cylinder piston arranged in the auxiliary oil cylinder barrel and an auxiliary oil cylinder end cover arranged at the other end of the auxiliary oil cylinder barrel, an auxiliary oil cylinder spring is arranged between the auxiliary oil cylinder end cover and the auxiliary oil cylinder piston, and two ends of the auxiliary oil cylinder spring are respectively abutted to the auxiliary oil cylinder end cover and the auxiliary oil cylinder piston. The auxiliary oil cylinder end cover and the auxiliary oil cylinder piston end face abutted to the auxiliary oil cylinder spring are both provided with spring grooves, and two ends of the auxiliary oil cylinder spring are located in the spring grooves, so that unnecessary displacement of the auxiliary oil cylinder spring is prevented. In the working process, when the amount of hydraulic oil between the auxiliary oil cylinder piston and the middle connecting body is increased, the auxiliary oil cylinder spring is gradually compressed, and when the amount of hydraulic oil between the auxiliary oil cylinder piston and the middle connecting body is reduced, the auxiliary oil cylinder spring drives the auxiliary oil cylinder piston to move towards the middle connecting body. The auxiliary oil cylinder piston can be an aluminum alloy piston.

Preferably, the auxiliary oil cylinder end cover is provided with an exhaust hole, the exhaust hole and the outside air are communicated with a cavity between the auxiliary oil cylinder end cover and the auxiliary oil cylinder piston, and therefore when the auxiliary oil cylinder spring is compressed, the gas in the auxiliary oil cylinder spring setting cavity of the auxiliary oil cylinder barrel can be smoothly exhausted.

Preferably, the main piston assembly further comprises a main cylinder piston, the main cylinder piston is in threaded connection with the piston rod, a first locking control valve is arranged at the end of the piston rod connected with the main cylinder piston, the first locking control valve comprises a first valve seat, a left valve core and a right valve core, the left valve core and the right valve core are respectively arranged in valve core cavities on two sides of the first valve seat, a spring cavity is arranged between the left valve core and the right valve core, a first spring is arranged in the spring cavity, two ends of the first spring are respectively abutted against the left valve core and the right valve core, valve holes are respectively formed in the left valve core and the right valve core, and the left valve core is communicated with a cavity between the main cylinder piston and the intermediate connector through a left channel in the. Cavities on two sides of a piston of the main oil cylinder are communicated with an oil guide hole I on the piston rod through a first locking control valve, when the piston rod is subjected to instant thrust, the flow rate of hydraulic oil in a cavity between the piston of the main oil cylinder and the middle connecting body flowing into the cavity between the piston of the main oil cylinder and an end cover of the main oil cylinder is instantly increased, so that a first compression spring is tightly attached to a first valve seat after a left valve core is subjected to instant force, and a valve hole on the left valve core is sealed; when the piston rod is subjected to instant tensile force, the flow velocity of hydraulic oil in the cavity between the main oil cylinder piston and the main oil cylinder end cover flowing to the cavity between the main oil cylinder piston and the middle connecting body is instantly increased, so that the compression spring I is tightly attached to the valve seat I after the right valve core is subjected to instant force action, and the valve hole of the right valve core is sealed; when the piston rod is subjected to instant force and gradually reduced, the left valve core or the right valve core is gradually separated from the valve seat I under the action of the spring I, the valve hole is opened, hydraulic oil can smoothly flow at normal small flow until the instant external force is completely eliminated, and the pipeline is effectively protected.

Preferably, the one end that the intermediate junction body is close to vice hydro-cylinder mechanism is equipped with the oil storage chamber, the other end is equipped with the valve base chamber, the oil storage chamber passes through the intermediate passage intercommunication with the valve base chamber, the setting of shutting control valve two is in the valve base intracavity, shutting control valve two includes valve base two, be equipped with the oil storage case in the valve base two, the terminal surface that the oil storage case is close to main hydro-cylinder mechanism one side sets up the case gland that has the mesopore, be equipped with the spring chamber between oil storage case and the intermediate passage, the spring intracavity is equipped with spring two, two both ends of spring respectively with two end wall butts of oil storage case and valve base, be. The oil storage cavity is communicated with the cavity between the middle connector and the main oil cylinder piston through the second locking control valve, when the piston rod is subjected to instant thrust, hydraulic oil in the cavity between the middle connector and the main oil cylinder piston flows into the oil storage cavity at the same time, the flow rate is high, so that the second oil storage valve core is tightly attached to the second valve seat under the stress of the second oil storage valve core, a valve hole of the second oil storage valve core is sealed, when external force disappears gradually, the second oil storage valve core is separated from the second valve seat under the action of the second spring, the valve hole is opened, the hydraulic oil can flow slowly at normal small flow rate until the instant external force disappears completely, and the pipeline is effectively protected. The oil storage cavity can store part of hydraulic oil, the weight of the whole device can be reduced, materials are saved, cost is reduced, and the cavity can be provided during oil injection, so that the reaction speed of the damper is improved.

Preferably, the periphery of the middle connector is provided with threads, the main oil cylinder barrel and the auxiliary oil cylinder barrel are respectively in threaded connection with two ends of the middle connector, and the ends of the main oil cylinder barrel and the auxiliary oil cylinder barrel are fixed through fastening screws. The main oil cylinder barrel, the auxiliary oil cylinder barrel and the middle connector are convenient to install, and the setting screws effectively prevent looseness between the main oil cylinder barrel and the auxiliary oil cylinder barrel.

Preferably, an oil filling hole is formed in the auxiliary oil cylinder barrel close to one end of the intermediate connecting body, and a plurality of second oil guide holes are formed in one end of the auxiliary oil cylinder piston close to the intermediate connecting body. Lead two intercommunication oil storage chambeies of oilhole, the back that finishes of the installation, hydraulic oil passes through the oil filler point and pours into the oil storage intracavity into to a plurality of settings of leading oilhole two make the oiling more smooth, shorten the oiling time.

Preferably, the first spiral groove is formed in the periphery of the first valve seat, and after the left valve core or the right valve core is locked, small-flow hydraulic oil flows through the first spiral groove, the flow speed is generally within 120nn/min, and the phenomenon that the device becomes a pure rigid element and causes irreversible damage to a connecting pipeline is avoided.

Preferably, the second spiral groove is formed in the periphery of the second valve seat, after a valve hole of the oil storage valve core is closed, small-flow hydraulic oil flows through the second spiral groove, the flow speed is generally within 120nn/min, and the phenomenon that the device becomes a pure rigid element and causes irreversible damage to a connecting pipeline is avoided.

Preferably, the peripheries of the front part and the rear part of the piston of the master cylinder are respectively provided with a groove, and a first guide belt is arranged in each groove. The first guiding belt can be a polytetrafluoroethylene guiding belt, so that the back and forth movement of the piston of the main oil cylinder is guided, the shaking phenomenon is avoided, and the working stability is improved.

Preferably, the peripheries of the front part and the rear part of the auxiliary oil cylinder piston are respectively provided with a groove, and a second guide belt is arranged in each groove. The second guide belt can be a polytetrafluoroethylene guide belt, so that the back-and-forth movement of the piston of the auxiliary oil cylinder is guided, the shaking phenomenon is avoided, and the working stability is improved.

Sealing rings are arranged between the main oil cylinder piston and the main oil cylinder barrel, between the auxiliary oil cylinder piston and the auxiliary oil cylinder barrel, between the main oil cylinder end cover and the main oil cylinder barrel and between the main oil cylinder end cover and the piston rod; the inner wall of the end cover of the main oil cylinder is provided with a groove, and a third guide belt is arranged in the groove, so that the guide effect is achieved in the motion process of the piston rod, and the stability of work is improved.

The main oil cylinder piston is of a split structure and comprises a first piston block and a second piston block, a first stepped hole is formed in the position of the central axis of the first piston block, a second stepped hole is formed in the position of the central axis of the second piston block, the periphery of the second piston block is stepped, the small end of the periphery of the second piston block is inserted into the large hole of the first stepped hole of the first piston block, and the diameter of a left valve core is larger than that of the small hole of the second stepped hole; the second big hole of the stepped hole and the first small hole of the stepped hole are matched with the piston rod, the inner wall of the second big hole of the stepped hole is in threaded connection with the piston rod, one end of the first small hole of the stepped hole is clamped at the shaft shoulder of the piston rod, and the second small hole of the stepped hole is a left channel; and a Glare ring is arranged between the first piston block and the second piston block, and the Glare ring mainly plays a role in sealing, so that the hydraulic oil is prevented from leaking.

Compared with the prior art, the utility model beneficial effect who has is:

the utility model has the advantages of reasonable design, the main oil cylinder mechanism and the auxiliary oil cylinder mechanism are arranged in a direct connection mode, the hydraulic oil circuit is simple and smooth, and the stability under the working state is improved; and the diameter of the cylinder barrel of the auxiliary oil cylinder is reduced, the diameter of the piston of the auxiliary oil cylinder is relatively reduced, the main oil cylinder mechanism and the auxiliary oil cylinder mechanism are arranged in a direct-connected mode, so that the whole length of the damper is increased, the length of a connecting rod of a pipeline is correspondingly reduced, raw materials are saved, the production cost is reduced, and the production and processing difficulty of parts is reduced.

Drawings

FIG. 1 is a schematic structural diagram of a hydraulic damper for a pipeline;

FIG. 2 is an enlarged view of part A in FIG. 1;

FIG. 3 is a partial enlarged view of B in FIG. 1;

FIG. 4 is a partial enlarged view of C in FIG. 1;

fig. 5 is a schematic diagram of the structure of the master cylinder piston.

In the figure: 1. a knuckle bearing; 2. a piston rod; 3. a main oil cylinder outer cover; 4. a master cylinder barrel; 5. a first guide belt; 6. a master cylinder piston; 7. tightening the screw; 8. an oil storage chamber; 9. an oil filler hole; 10. a second oil guide hole; 11. a second guide belt; 12. a spring slot; 13. calibration; 14. an exhaust hole; 15. an auxiliary oil cylinder end cover; 16. an auxiliary cylinder spring; 17. a cylinder barrel of the auxiliary oil cylinder; 18. a slave cylinder piston; 19. an intermediate connector; 20. a first oil guide hole; 21. a main cylinder end cover; 22. a third guide belt; 23. a right valve core; 24. a valve bore; 25. a first valve seat; 26. a left valve core; 27. a first spring; 28. a valve core gland bush; 29. an oil storage valve core; 30. a second valve seat; 31. a second spring; 32. a middle channel; 33. a first piston block; 34. a piston block II; 35. a Glare circle; 36. a left channel; 37. a first spiral groove; 38. and a second spiral groove.

Detailed Description

The invention will be further described with reference to the accompanying drawings:

as shown in fig. 1-5, the hydraulic damper for pipelines of the present invention comprises a main cylinder mechanism and an auxiliary cylinder mechanism, wherein the main cylinder mechanism and the auxiliary cylinder mechanism are respectively connected with a joint bearing 1, and an intermediate connector 19 is arranged between the main cylinder mechanism and the auxiliary cylinder mechanism; the main oil cylinder mechanism comprises a main oil cylinder barrel 4 and a piston rod 2, one end of the main oil cylinder barrel 4 is fixedly connected with one end of an intermediate connecting body 19, a main oil cylinder end cover 21 is fixed at the other end of the main oil cylinder barrel 4, one end of the piston rod 2 is connected with a main piston assembly arranged in the main oil cylinder barrel 4, the other end of the piston rod penetrates through the main oil cylinder end cover 21, a first locking control valve is arranged at the joint of the main piston assembly and the piston rod 2, the first locking control valve is communicated with one end of a first oil guide hole 20 arranged on the piston rod 2, and the other end of the first oil guide hole 20 is communicated with a cavity between the main; one end of an auxiliary oil cylinder barrel 17 of the auxiliary oil cylinder mechanism is fixedly connected with the other end of an intermediate connecting body 19, the intermediate connecting body 19 is communicated with the auxiliary oil cylinder barrel 17 and the main oil cylinder barrel 4, and one end of the intermediate connecting body 19 is provided with a second locking control valve; the auxiliary cylinder barrel 17 is coaxial with the main cylinder barrel 4.

In this embodiment:

the main oil cylinder mechanism also comprises a main oil cylinder outer cover 3, the main oil cylinder outer cover 3 is sleeved on the periphery of a main oil cylinder barrel 4 at one end of a main oil cylinder end cover 21, and the main oil cylinder outer cover 3 is fixedly connected with one end of a piston rod 2 penetrating through the main oil cylinder end cover 21 through threads; the outer surface of the main oil cylinder barrel 4 is marked with scales 13. In the using process, the position of the main piston assembly can be judged by judging the scale 13 corresponding to the main oil cylinder outer cover 3, and the offset distance of the connecting pipeline is deduced; initial installation of the main piston assembly may also be facilitated.

The auxiliary oil cylinder mechanism further comprises an auxiliary oil cylinder piston 18 arranged in the auxiliary oil cylinder barrel 17 and an auxiliary oil cylinder end cover 15 arranged at the other end of the auxiliary oil cylinder barrel 17, an auxiliary oil cylinder spring 16 is arranged between the auxiliary oil cylinder end cover 15 and the auxiliary oil cylinder piston 18, and two ends of the auxiliary oil cylinder spring 16 are respectively abutted to the auxiliary oil cylinder end cover 15 and the auxiliary oil cylinder piston 18. The end faces of the auxiliary oil cylinder end cover 15 and the auxiliary oil cylinder piston 18 abutted to the auxiliary oil cylinder spring 16 are respectively provided with a spring groove 12, and two ends of the auxiliary oil cylinder spring 16 are located in the spring grooves 12, so that the auxiliary oil cylinder spring 16 is prevented from being unnecessarily displaced. In the working process, when the amount of the hydraulic oil between the auxiliary cylinder piston 18 and the intermediate connecting body 19 increases, the auxiliary cylinder spring 16 is gradually compressed, and when the amount of the hydraulic oil between the auxiliary cylinder piston 18 and the intermediate connecting body 19 decreases, the auxiliary cylinder spring 16 drives the auxiliary cylinder piston 18 to move towards the intermediate connecting body 19. The slave cylinder piston 18 may be an aluminum alloy piston.

The auxiliary oil cylinder end cover 15 is provided with an exhaust hole 14, the exhaust hole 14 and the cavity between the external air and the auxiliary oil cylinder end cover 15 and the auxiliary oil cylinder piston 18 are convenient for the air in the cavity of the auxiliary oil cylinder spring 16 of the auxiliary oil cylinder barrel 17 to be smoothly exhausted when the auxiliary oil cylinder spring 16 is compressed.

The main piston assembly further comprises a main cylinder piston 6, the main cylinder piston 6 is in threaded connection with the piston rod 2, a first locking control valve is arranged at the end portion of the piston rod 2 connected with the main cylinder piston 6 and comprises a first valve seat 25, a left valve core 26 and a right valve core 23, the left valve core 26 and the right valve core 23 are respectively arranged in valve core cavities on two sides of the first valve seat 25, a spring cavity is arranged between the left valve core 26 and the right valve core 23, a first spring 27 is arranged in the spring cavity, two ends of the first spring 27 are respectively abutted to the left valve core 26 and the right valve core 23, valve holes 24 are respectively formed in the left valve core 26 and the right valve core 23, and the left valve core 26 is communicated with a cavity between the main cylinder piston 6 and the intermediate connecting body 19 through a left channel 36 in. The cavities at the two sides of the main oil cylinder piston 6 are communicated with the first oil guide hole 20 on the piston rod 2 through the first locking control valve.

One end of the intermediate connector 19 close to the auxiliary oil cylinder mechanism is provided with an oil storage cavity 8, the other end of the intermediate connector is provided with a valve seat cavity, the oil storage cavity 8 is communicated with the valve seat cavity through an intermediate channel 32, a second locking control valve is arranged in the valve seat cavity, the second locking control valve comprises a second valve seat 30, an oil storage valve core 29 is arranged in the second valve seat 30, a valve core pressing cover 28 with a middle hole is arranged on the end face of the oil storage valve core 29 close to one side of the main oil cylinder mechanism, a spring cavity is arranged between the oil storage valve core 29 and the intermediate channel 32, a second spring 31 is arranged in the spring cavity, two ends of the second spring 31 are respectively abutted against the end walls of. The oil storage cavity 8 is communicated with a cavity between the intermediate connecting body 19 and the main oil cylinder piston 6 through a second locking control valve. The oil storage cavity 8 can store part of hydraulic oil, the weight of the whole device can be reduced, materials are saved, cost is reduced, a cavity can be provided during oil injection, and the improvement of the reaction speed of the damper is facilitated.

The periphery of the middle connecting body 19 is provided with threads, the main cylinder barrel 4 and the auxiliary cylinder barrel 17 are respectively in threaded connection with two ends of the middle connecting body 19, and the ends of the main cylinder barrel 4 and the auxiliary cylinder barrel 17 are fixed through the set screws 7. The main cylinder barrel 4, the auxiliary cylinder barrel 17 and the intermediate connecting body 19 are convenient to install, and the setting screw 7 effectively prevents looseness between the main cylinder barrel 4 and the auxiliary cylinder barrel 17.

An oil hole 9 is arranged on the auxiliary oil cylinder barrel 17 close to one end of the intermediate connecting body 19, and a plurality of oil guide holes two 10 are arranged at one end of the auxiliary oil cylinder piston 18 close to the intermediate connecting body 19. Lead two 10 intercommunication oil storage chambeies in the oilhole, the back of finishing the installation, hydraulic oil passes through oil filler point 9 and pours into oil storage chamber 8 into to setting up of a plurality of two 10 of leading oilholes makes the oiling more smooth, shortens the oiling time. The oil filler point 9 is provided with a plugging piece when not in use, thereby preventing the leakage of hydraulic oil.

The periphery of the first valve seat 25 is provided with a first spiral groove 37, the periphery of the second valve seat 30 is provided with a second spiral groove 38, and after the valve hole 24 of the left valve core 26, the right valve core 23 or the oil storage valve core 29 is locked, small-flow hydraulic oil flows through the first spiral groove 37 or the second spiral groove 38, the flow speed is generally within 120nn/min, and the device is prevented from becoming a pure rigid element and causing irreversible damage to a connecting pipeline.

The peripheries of the front part and the rear part of the main oil cylinder piston 6 are respectively provided with a groove, and a guide belt I5 is arranged in each groove. The first guide belt 5 can be a polytetrafluoroethylene guide belt, so that the back and forth movement of the main oil cylinder piston 6 is guided, the shaking phenomenon is avoided, and the working stability is improved.

The peripheries of the front part and the rear part of the auxiliary oil cylinder piston 18 are respectively provided with a groove, and a second guide belt 11 is arranged in each groove. The second guide belt 11 can be a polytetrafluoroethylene guide belt, so that the back-and-forth movement of the auxiliary oil cylinder piston 18 is guided, the shaking phenomenon is avoided, and the working stability is improved.

Sealing rings are arranged between the main oil cylinder piston 6 and the main oil cylinder barrel 4, between the auxiliary oil cylinder piston 18 and the auxiliary oil cylinder barrel 17, between the main oil cylinder end cover 21 and the main oil cylinder barrel 4 and between the main oil cylinder end cover 21 and the piston rod 2; the inner wall of the main oil cylinder end cover 21 is provided with a groove, a third guide belt 22 is arranged in the groove, and the guide function is achieved in the movement process of the piston rod 2, so that the working stability is improved.

The main oil cylinder piston 6 is of a split structure and comprises a first piston block 33 and a second piston block 34, a first stepped hole is formed in the central axis position of the first piston block 33, a second stepped hole is formed in the central axis position of the second piston block 34, the periphery of the second piston block 34 is stepped, the small end of the periphery of the second piston block 34 is inserted into a drilled hole of the first stepped hole of the first piston block 33, and the diameter of the left valve core 26 is larger than that of the second stepped hole; the second big hole of the stepped hole and the first small hole of the stepped hole are both matched with the piston rod 2, the inner wall of the second big hole of the stepped hole is in threaded connection with the piston rod 2, one end of the first small hole of the stepped hole is clamped at the shaft shoulder of the piston rod 2, and the second small hole of the stepped hole is a left channel 36; and a Glare ring 35 is arranged between the first piston block 33 and the second piston block 34, and the Glare ring 35 mainly plays a role in sealing to ensure that hydraulic oil cannot leak.

The damper is connected with the pipeline connecting rods on two sides of the damper through the joint bearings 1, when a pipeline or equipment is in normal expansion deformation, the locking control valve I and the locking control valve II are in an unlocked state, the relative positions of the main oil cylinder mechanism and the auxiliary oil cylinder mechanism can change along with the normal expansion deformation, and the damping force is very small and almost zero.

During load transient, the specific working process is as follows: when the piston rod 2 is subjected to instant thrust, the flow rate of hydraulic oil flowing to the cavities on the two sides from the cavity between the main cylinder piston 6 and the middle connecting body 19 is instantly increased, so that the compression spring I27 is tightly attached to the valve seat I25 after the left valve core 26 is instantly subjected to force, the valve hole 24 on the left valve core 26 is sealed, meanwhile, the compression spring II 31 is tightly attached to the valve seat II 30 after the oil storage valve core 29 is subjected to force, the valve hole 24 of the oil storage valve core 29 is sealed, the pipeline is prevented from being greatly deformed, and the pipeline is protected from reducing loss; when the piston rod 2 is subjected to instant force and gradually reduces, the left valve core 26 and the oil storage valve core 29 are separated from the first valve seat 25 or the second valve seat 30 under the action of the first spring 27 and the second spring 31 respectively, the valve hole 24 is opened, hydraulic oil can smoothly flow at normal small flow rate until the instant external force completely disappears, and the pipeline is effectively protected.

When the piston rod 2 is subjected to instant pulling force, the flow velocity of hydraulic oil in the cavity between the main oil cylinder piston 6 and the main oil cylinder end cover 21 flowing to the cavity between the main oil cylinder piston 6 and the middle connecting body 19 is instantly increased, so that the compression spring I27 is tightly attached to the valve seat I25 after the right valve core 23 is instantly acted by force, and the valve hole 24 of the right valve core 23 is sealed. When the piston rod 2 is subjected to instant force and gradually reduced, the right valve core 23 is gradually separated from the first valve seat 25 under the action of the first spring 27, the valve hole 24 is opened, hydraulic oil can smoothly flow at normal small flow rate until the instant external force is completely eliminated, and the pipeline is effectively protected.

Claims

1. The utility model provides a hydraulic damper for pipeline, includes master cylinder mechanism and vice hydro-cylinder mechanism, and master cylinder mechanism and vice hydro-cylinder mechanism are connected with joint bearing (1) respectively, its characterized in that: an intermediate connecting body (19) is arranged between the main oil cylinder mechanism and the auxiliary oil cylinder mechanism; the main oil cylinder mechanism comprises a main oil cylinder barrel (4) and a piston rod (2), one end of the main oil cylinder barrel (4) is fixedly connected with one end of an intermediate connector (19), a main oil cylinder end cover (21) is fixed to the other end of the main oil cylinder barrel (4), one end of the piston rod (2) is connected with a main piston assembly arranged in the main oil cylinder barrel (4), the other end of the piston rod penetrates through the main oil cylinder end cover (21), a first locking control valve is arranged at the joint of the main piston assembly and the piston rod (2), the first locking control valve is communicated with one end of a first oil guide hole (20) arranged on the piston rod (2), and the other end of the first oil guide hole (20) is communicated with a cavity between the main piston assembly and the main oil cylinder end; one end of an auxiliary oil cylinder barrel (17) of the auxiliary oil cylinder mechanism is fixedly connected with the other end of an intermediate connecting body (19), the intermediate connecting body (19) is communicated with the auxiliary oil cylinder barrel (17) and the main oil cylinder barrel (4), and one end of the intermediate connecting body (19) is provided with a second locking control valve; the auxiliary oil cylinder barrel (17) is coaxial with the main oil cylinder barrel (4).

2. The hydraulic damper for piping according to claim 1, wherein: the main oil cylinder mechanism further comprises a main oil cylinder outer cover (3), the main oil cylinder outer cover (3) is sleeved on the periphery of a main oil cylinder barrel (4) at one end of a main oil cylinder end cover (21), and the main oil cylinder outer cover (3) is fixedly connected with one end of a piston rod (2) penetrating through the main oil cylinder end cover (21) through threads; the outer surface of the main oil cylinder barrel (4) is marked with scales (13).

3. The hydraulic damper for piping according to claim 1, wherein: the auxiliary oil cylinder mechanism further comprises an auxiliary oil cylinder piston (18) arranged in the auxiliary oil cylinder barrel (17) and an auxiliary oil cylinder end cover (15) arranged at the other end of the auxiliary oil cylinder barrel (17), an auxiliary oil cylinder spring (16) is arranged between the auxiliary oil cylinder end cover (15) and the auxiliary oil cylinder piston (18), and two ends of the auxiliary oil cylinder spring (16) are respectively abutted to the auxiliary oil cylinder end cover (15) and the auxiliary oil cylinder piston (18).

4. The hydraulic damper for piping as set forth in claim 3, wherein: the auxiliary oil cylinder end cover (15) is provided with an exhaust hole (14).

5. The hydraulic damper for piping according to claim 1, wherein: the main piston assembly also comprises a main oil cylinder piston (6), the main oil cylinder piston (6) is in threaded connection with the piston rod (2), and the end part of a piston rod (2) connected with a main oil cylinder piston (6) is provided with a first locking control valve which comprises a first valve seat (25), a left valve core (26) and a right valve core (23), the left valve core (26) and the right valve core (23) are respectively arranged in valve core cavities at two sides of the first valve seat (25), and be equipped with the spring chamber between left spool (26) and right spool (23), spring intracavity is installed spring one (27), and spring one (27) both ends respectively with left spool (26) and right spool (23) butt, all are equipped with valve opening (24) on left spool (26) and the right spool (23), and left spool (26) are through the cavity between left passageway (36) the intercommunication master cylinder piston (6) on master cylinder piston (6) and intermediate junction body (19).

6. The hydraulic damper for piping according to claim 1, wherein: one end of the intermediate connector (19) close to the auxiliary oil cylinder mechanism is provided with an oil storage cavity (8), the other end of the intermediate connector is provided with a valve seat cavity, the oil storage cavity (8) is communicated with the valve seat cavity through an intermediate channel (32), a locking control valve II is arranged in the valve seat cavity, the locking control valve II comprises a valve seat II (30), an oil storage valve core (29) is arranged in the valve seat II (30), the end face of the oil storage valve core (29) close to one side of the main oil cylinder mechanism is provided with a valve core gland (28) with a middle hole, a spring cavity is arranged between the oil storage valve core (29) and the intermediate channel (32), a spring II (31) is arranged in the spring cavity, two ends of the spring II (31) are respectively abutted against the end walls of the oil storage valve core (29).

7. The hydraulic damper for piping as claimed in claim 1 or 6, wherein: the periphery of the middle connecting body (19) is provided with threads, the main oil cylinder barrel (4) and the auxiliary oil cylinder barrel (17) are respectively in threaded connection with the two ends of the middle connecting body (19), and the ends of the main oil cylinder barrel (4) and the auxiliary oil cylinder barrel (17) are fixed through a set screw (7).

8. The hydraulic damper for piping according to claim 1, wherein: an oil hole (9) is arranged on the auxiliary oil cylinder barrel (17) close to one end of the intermediate connecting body (19), and a plurality of oil guide holes II (10) are arranged at one end of the auxiliary oil cylinder piston (18) close to the intermediate connecting body (19).

9. The hydraulic damper for piping according to claim 5, wherein: the periphery of the first valve seat (25) is provided with a first spiral groove (37).

10. The hydraulic damper for piping as set forth in claim 3, wherein: and a second spiral groove (38) is formed in the periphery of the second valve seat (30).