CN115306975B

CN115306975B - Hydraulic pipeline connecting device

Info

Publication number: CN115306975B
Application number: CN202211237908.5A
Authority: CN
Inventors: 兰伟杰
Original assignee: BODEN HYDRAULICS CO LTD
Current assignee: BODEN HYDRAULICS CO LTD
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2023-01-13
Anticipated expiration: 2042-10-11
Also published as: CN115306975A

Abstract

The invention relates to the technical field of pipeline connection. The hydraulic pipeline connecting device comprises two connecting rings and a sealing washer, wherein each connecting ring is fixedly connected with the connecting end of one pipeline, the two pipelines are connected through two connecting ring flanges, and the sealing washer is arranged between the two connecting rings. The hydraulic pipeline connecting device further comprises a compression ring, an adjusting ring, a piston plate and a transmission mechanism. When the valve controlling the flow of water is suddenly closed or opened, the piston plate moves along the connecting cylinder to the side far away from the second pipeline. Through setting up drive mechanism and adjustable ring, can make the adjustable ring can be close to one side removal of clamp ring when the piston plate moves to one side of keeping away from the second pipeline, and then compress seal ring for the junction leakproofness of first pipeline and second pipeline is better.

Description

Hydraulic pipeline connecting device

Technical Field

The invention relates to the technical field of pipeline connection, in particular to a hydraulic pipeline connecting device.

Background

The hydraulic pipeline connecting device is a part for connecting a high-pressure oil pipe and a high-pressure oil pipe in a hydraulic system. Because the pressure in the hydraulic pipe is very big, ordinary connector can't use. When hydraulic pipelines are connected, a lead screw and a gasket are generally adopted. When a hydraulic system operates, liquid enters a pipeline through a pipe joint, and the impact force of the liquid on the pipeline is large when the hydraulic system is just started, so that the joint of the pipeline and the pipe joint is easy to loosen after the existing hydraulic pipeline connecting device is used for a long time, and if the hydraulic pipeline connecting device is directly assembled tightly, a sealing part can be damaged for a long time. If the hydraulic system is not timely checked and maintained, when the hydraulic system is started again, the impact force of liquid is easy to cause pipeline separation, safety accidents are caused, and liquid leakage can be caused after the pipeline falls off.

The invention patent with publication number CN113503409B provides a pipe joint for a hydraulic system, which reduces the impact force when the hydraulic system is just started by setting a buffering locking mechanism and using the fact that a bellows can extend to offset the impact force caused by a part of liquid, but the bellows is generally made of a material capable of being deformed in a telescopic manner, and the two ends of the bellows are directly connected with a hard pipe and a joint seat, which results in poor stability and low reliability.

Disclosure of Invention

The invention provides a hydraulic pipeline connecting device, which aims to solve the problems of poor sealing effect and low reliability of the existing hydraulic hard pipe joint.

The hydraulic pipeline connecting device adopts the following technical scheme:

the utility model provides a hydraulic pressure pipeline connecting device, hydraulic pressure pipeline connecting device includes two go-between and seal ring, the link fixed connection of every go-between and a pipeline, through two go-between flange joint during two pipe connection, seal ring sets up between two go-between. The water flow direction is used as a first direction, the pipeline at the rear side is a first pipeline, and the pipeline at the front side is a second pipeline. The hydraulic pipeline connecting device also comprises a compression ring, an adjusting ring, a piston plate and a transmission mechanism; the compression ring is sleeved on the second pipeline, the compression ring is fixedly arranged on the connecting ring on the first pipeline, and a first thread groove is formed in the inner peripheral wall of the compression ring; the adjusting ring is sleeved on the second pipeline, a second thread groove in spiral fit with the first thread groove is formed in the outer peripheral wall of the adjusting ring, and the adjusting ring is configured to move towards one side close to the compression ring when rotating around the second pipeline along the first circumferential direction; connecting cylinders are fixedly mounted on two sides of the second pipeline, and the axes of the connecting cylinders are perpendicular to the axis of the second pipeline; the piston plate has two, and every piston plate sets up in a connecting cylinder, and the sealed sliding fit of piston plate and the internal perisporium of connecting cylinder, piston plate configuration become to receive liquid effort and can follow the connecting cylinder and remove to the one side of keeping away from the second pipeline when exceeding the default, and drive mechanism is used for making when piston plate removes to the one side of keeping away from the second pipeline adjust and encircle the second pipeline and rotate along first week.

Furthermore, the hydraulic pipeline connecting device also comprises two limiting buffer mechanisms, each limiting buffer mechanism is arranged in one connecting cylinder, and each limiting buffer mechanism comprises a baffle ring, a driving ring, a fixed shaft, a driving disc and a plurality of telescopic swing rods; the baffle ring and the connecting cylinder are coaxially arranged, and one end of the baffle ring is fixedly arranged on one side of the piston plate, which faces the second pipeline; the driving ring is arranged at the inner side of the baffle ring and is in sealing sliding fit with the baffle ring in the axial direction of the connecting cylinder, and the driving ring is configured to move to one side close to the piston plate when being acted by liquid; the fixed shaft and the baffle ring are coaxially arranged and fixedly installed on the second pipeline; the driving ring is arranged between the fixed shaft and the driving ring and is in spiral transmission fit with the driving ring, and the driving ring is configured to rotate around the fixed shaft in a second circumferential direction when moving to one side close to the piston plate relative to the baffle ring; and the plurality of telescopic swing rods are uniformly distributed around the circumference of the fixed shaft, and the telescopic swing rods are arranged in a way that after the driving disc rotates around the fixed shaft by a preset angle along the second circumference, the two ends of each telescopic swing rod respectively abut against the fixed shaft and the retaining ring.

Furthermore, the telescopic swing rod is a spring telescopic rod, the two ends of the telescopic swing rod are respectively a first end portion and a second end portion, the first end portion of the telescopic swing rod is close to the fixed shaft, the second end portion of the telescopic swing rod is close to the retaining ring, and the first end portion of the telescopic swing rod is located on the front side of the second end portion in the second circumferential direction in the initial state.

Furthermore, the second end of the telescopic swing rod is rough, and the inner peripheral wall of the baffle ring is rough.

Furthermore, a baffle plate is arranged at one end of the connecting cylinder, which is far away from the second pipeline, a through hole is formed in the baffle plate, and the transmission mechanism comprises an adjusting gear, an adjusting rack and a connecting piece; the two adjusting racks are respectively arranged on two sides of the adjusting gear and meshed with the adjusting gear; the number of the connecting pieces is two, and each connecting piece is used for fixedly connecting one adjusting rack to the piston plate; the connecting piece includes head rod and second connecting rod, and the head rod runs through in the perforating hole, and with the pore wall sliding fit of perforating hole, the one end and the head rod fixed connection of second connecting rod, the other end and the regulation rack fixed connection of second connecting rod.

Furthermore, the hydraulic pipeline connecting device also comprises a reset mechanism, the reset mechanism comprises a first reset spring and a second reset spring, the first reset spring is a torsion spring, the first reset spring is sleeved on the outer side of the fixed shaft, one end of the first reset spring is connected with the driving ring, and the other end of the first reset spring is connected with the driving disc; the second reset spring is sleeved on the first connecting rod and is located between the baffle plate and the piston plate, one end of the second reset spring is abutted to the piston plate, and the other end of the second reset spring is abutted to the baffle plate.

Furthermore, the first end part and the second end part of the telescopic swing rod are both provided with limiting holes; the limiting buffer mechanism further comprises a first limiting column and a second limiting column, the first limiting column is inserted into the limiting hole of the second end portion and is fixedly connected with the driving disc, and the second limiting column is inserted into the limiting hole of the first end portion and is fixedly connected with the piston plate.

Furthermore, an annular guide rail is arranged on one side of the connecting ring installed on the second pipeline, a circle of balls are arranged on one side, facing the connecting ring installed on the second pipeline, of the adjusting ring, and the balls are located in the annular guide rail.

Furthermore, the baffle is also provided with a vent valve and a dustproof plug; the vent valve is used for ventilation; the dustproof plug is arranged on the hole wall of the through hole and is in contact with the first connecting rod.

Furthermore, the hydraulic pipeline connecting device further comprises a supporting beam, two ends of the supporting beam are in contact with the cylinder wall of the connecting cylinder, and one end, facing the second pipeline, of the fixing shaft is fixedly connected with the supporting beam.

The invention has the beneficial effects that: when the hydraulic pipeline connecting device is used, if no liquid exists in the first pipeline and the second pipeline, the adjusting ring has no pressure or very low pressure on the connecting ring, the stress time of the sealing washer can be shortened, and the service life of the sealing washer can be prolonged. When liquid flows in the first pipeline and the second pipeline, impact force of water on the pipelines can be buffered by arranging the connecting cylinder and the piston plate, specifically, when a valve for controlling water flow is suddenly closed or opened, the water pressure of the piston plate under the water hammer effect is instantly increased, so that the acting force of the piston plate far away from the second pipeline exceeds a preset value, and the piston plate moves towards one side far away from the second pipeline along the connecting cylinder. Through setting up drive mechanism and adjustable ring, can make the adjustable ring move near one side of clamp ring when the piston plate moves to one side of keeping away from the second pipeline, and then compress seal ring for the junction leakproofness of first pipeline and second pipeline is better.

Furtherly, through setting up spacing buffer gear, can further cushion liquid to the impact force of pipeline, and liquid when normally flowing in first pipeline and second pipeline, the piston board keeps on the position that moves and can not reset, and then makes seal ring be in the atress maximum state for first pipeline and second pipeline junction are sealed effectual.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view showing a structure of an embodiment of a hydraulic pipe coupling device according to the present invention mounted on two pipes;

FIG. 2 is a schematic view in section of the second conduit and connector barrel in the condition of FIG. 1;

FIG. 3 is a schematic view of a structure of an adapted pipe joint of an embodiment of a hydraulic pipe connection apparatus of the present invention;

FIG. 4 is a schematic view showing the structure of an adjusting ring of an embodiment of a hydraulic pipe connecting device according to the present invention;

FIG. 5 is a schematic view of an adjusting rack and a piston plate of an embodiment of a hydraulic pipe coupling apparatus according to the present invention;

FIG. 6 is a schematic view showing an internal structure of a connector barrel in an initial state of an embodiment of a hydraulic pipe connecting device according to the present invention;

FIG. 7 is a schematic view of another embodiment of a hydraulic pipe coupling apparatus according to the present invention;

fig. 8 is a schematic view illustrating a state in which the adjusting ring abuts against the connection ring according to an embodiment of the hydraulic pipe connection device of the present invention.

In the figure: 100. a first conduit; 110. a connecting ring; 120. a sealing gasket; 210. a compression ring; 220. an adjusting ring; 221. a ball bearing; 223. an adjusting gear; 311. a piston plate; 312. a drive ring; 313. a drive plate; 3131. a helical groove; 314. a first return spring; 315. a first limit post; 316. a telescopic swing rod; 317. a baffle ring; 318. a second limit post; 320. adjusting the rack; 330. a first connecting rod; 340. a second connecting rod; 400. a second conduit; 410. a support beam; 411. a fixed shaft; 420. a vent valve; 430. a dust plug; 440. a connecting cylinder; 441. and a baffle plate.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In an embodiment of a hydraulic pipe connection apparatus according to the present invention, as shown in fig. 1 to 8, the hydraulic pipe connection apparatus includes two connection rings 110 and a sealing gasket 120, each connection ring 110 is fixedly connected to a connection end of one pipe, the two pipes are flange-connected by the two connection rings 110 when connected, the sealing gasket 120 is disposed between the two connection rings 110, and the sealing gasket 120 is made of rubber. Taking the water flowing direction as the first direction, along the first direction, the pipe at the rear side is the first pipe 100, and the pipe at the front side is the second pipe 400. A hydraulic pipe connection further includes a compression ring 210, an adjustment ring 220, a piston plate 311, and a transmission mechanism. The clamp ring 210 is sleeved on the second pipeline 400, the clamp ring 210 is fixedly mounted on the connection ring 110 on the first pipeline 100, and a first thread groove is formed on the inner circumferential wall of the clamp ring 210. The adjusting ring 220 is disposed on the second pipe 400, a second thread groove spirally engaged with the first thread groove is disposed on an outer circumferential wall of the adjusting ring 220, and the adjusting ring 220 is configured to move toward a side close to the compression ring 210 when rotating around the second pipe 400 along the first circumferential direction, and abut against the connection ring 110 mounted on the second pipe 400. The connecting cylinders 440 are fixedly installed at both sides of the second pipe 400, and the axes of the connecting cylinders 440 are perpendicular to the axis of the second pipe 400. Two piston plates 311 are provided, each piston plate 311 is disposed in one of the connecting cylinders 440, the piston plates 311 are in sealed sliding fit with the inner peripheral wall of the connecting cylinder 440, each piston plate 311 is configured to move along the connecting cylinder 440 to a side away from the second pipe 400 when the acting force applied to the piston plate 311 exceeds a predetermined value, and the transmission mechanism is configured to cause the adjusting ring 220 to rotate in the first circumferential direction around the second pipe 400 when the piston plate 311 moves to the side away from the second pipe 400.

Specifically, when the valve for controlling the flow of water is suddenly closed or opened, the water pressure applied to the piston plate 311 by the water hammer effect increases momentarily, so that the acting force applied to the piston plate 311 away from the second pipe 400 exceeds the predetermined value, and the piston plate 311 moves along the connecting cylinder 440 to the side away from the second pipe 400, taking the acting force of the water on the piston plate 311 as the predetermined value when the liquid normally flows in the first pipe 100 and the second pipe 400.

In this embodiment, the hydraulic pipeline connecting device further includes two limiting buffer mechanisms, each limiting buffer mechanism is disposed in one connecting cylinder 440, and each limiting buffer mechanism includes a baffle ring 317, a driving ring 312, a fixed shaft 411, a driving disk 313 and a plurality of telescopic swing rods 316. The stopper ring 317 is coaxially disposed with the connecting cylinder 440, and one end of the stopper ring 317 is fixedly mounted on the piston plate 311 at a side facing the second conduit 400. The drive ring 312 is located inside the stopper ring 317 and is in sealing sliding engagement with the stopper ring 317 in the axial direction of the connecting cylinder 440, and the drive ring 312 is configured to move to a side close to the piston plate 311 when receiving a force of the liquid. The fixing shaft 411 is coaxially disposed with the baffle ring 317, and is fixedly installed on the second pipe 400. A driving disc 313 is disposed between the fixed shaft 411 and the driving ring 312, and is in screw-driving fit with the driving ring 312 through a screw-driving mechanism, the driving disc 313 is configured to rotate around the fixed shaft 411 in a second circumferential direction when the driving ring 312 moves towards the side close to the piston plate 311 relative to the retainer ring 317, specifically, as shown in fig. 6, the screw-driving mechanism includes a plurality of screw grooves 3131 and a plurality of sliding columns (not shown in the figure), the plurality of screw grooves 3131 are evenly distributed on the outer circumferential wall of the driving disc 313, each screw groove 3131 spirally extends from one end face of the driving disc 313 to the other end face of the driving disc 313, the plurality of sliding columns are provided, each sliding column extends along the radial direction of the driving ring, one end of the sliding columns is fixedly mounted on the inner circumferential wall of the driving ring, the other end of the sliding columns is provided with rollers, the rollers are disposed in one screw groove 3131 and slidably disposed along the screw groove 3131, and the end of the initial sliding columns, where the rollers are disposed, is at the end of the piston away from the outer circumferential plate 311 of the screw groove 3131, so that the driving disc 313 rotates around the fixed shaft 411 when the driving ring moves towards the side close to the piston plate 311 relative to the side close to the retainer ring 317 relative to the piston plate 317 relative to the retainer ring 317. The driving ring 312 is pushed by the liquid and moves relative to the baffle ring 317 towards the side far away from the second pipe 400, and the driving ring 312 moves to drive the driving disc 313 to rotate around the fixed shaft 411 in the second circumferential direction under the action of the screw transmission. The plurality of telescopic swing rods 316 are uniformly distributed around the circumference of the fixed shaft 411, the telescopic swing rods 316 are arranged in a way that after the driving disc 313 rotates around the fixed shaft 411 along the second circumference for a preset angle, two ends of the telescopic swing rods 316 respectively abut against the fixed shaft 411 and the retaining ring 317, and the telescopic swing rods 316 are contracted to the shortest length. The preset angle is an angle at which the driving disk 313 rotates when the liquid normally flows in the first and

second pipes

100 and 400.

Specifically, the telescopic swing link 316 is a spring telescopic link, two ends of the telescopic swing link 316 are respectively a first end portion and a second end portion, the first end portion of the telescopic swing link 316 is close to the fixed shaft 411, the second end portion of the telescopic swing link 316 is close to the retaining ring 317, and the first end portion of the telescopic swing link 316 is located at the front side of the second end portion along the second circumferential direction in the initial state. When the two ends of the telescopic swing link 316 abut against the fixed shaft 411 and the retaining ring 317 respectively, the rotation of the driving disc 313 is limited, so that the acting force of the liquid on the driving disc 313 is finally converted into the elastic contraction of the telescopic swing link 316, the impact of the liquid on the second pipeline 400 is buffered, and the impact of the liquid on the piston plate 311 is reduced.

In this embodiment, the second end of the telescopic swing link 316 is rough, and the inner peripheral wall of the retaining ring 317 is rough. So that the second end of the swing link 316 abuts against the inner peripheral wall of the retaining ring 317 and the swing link 316 no longer moves relative to the retaining ring 317, and thus the driving plate 313 and the piston plate 311 are relatively fixed, which is the shortest length of the swing link 316.

In this embodiment, a baffle 441 is disposed at an end of the connecting cylinder 440 far from the second pipe 400, a through hole is disposed on the baffle 441, and the transmission mechanism includes an adjusting gear 223, an adjusting rack 320 and a connecting member. The adjusting gear 223 is fixedly installed on the adjusting ring 220, and two adjusting racks 320 are respectively arranged on two sides of the adjusting gear 223 and meshed with the adjusting gear 223. There are two connectors, each for fixedly connecting one adjustment rack 320 to the piston plate 311. Each connecting piece includes head rod 330 and second connecting rod 340, head rod 330 runs through in the perforating hole, and with the pore wall sliding fit of perforating hole, the one end and the head rod 330 fixed connection of second connecting rod 340, the other end and the regulation rack 320 fixed connection of second connecting rod 340, can drive regulation rack 320 synchronous motion through drive mechanism when piston plate 311 moves to the one side of keeping away from second pipeline 400 along connecting cylinder 440, regulation rack 320 drives regulation gear 223 and rotates along first week around self axis, regulation gear 223 drives regulation ring 220 synchronous rotation.

In this embodiment, a hydraulic pipe connecting apparatus further includes a return mechanism including a first return spring 314 and a second return spring. The first return spring 314 is a torsion spring, the first return spring 314 is sleeved outside the fixed shaft 411, one end of the first return spring 314 is connected with the driving ring 312, and the other end is connected with the driving disc 313, when the driving disc 313 does not bear the acting force of the liquid, the driving disc 313 can be reset under the action of the first return spring 314, and the driving disc 312 and the telescopic swing rod 316 are driven to reset. The second return spring is sleeved on the first connecting rod 330 and located between the baffle 441 and the piston plate 311, one end of the second return spring abuts against the piston plate 311, and the other end of the second return spring abuts against the baffle 441, so that the piston plate 311 is reset under the action of the second return spring when the acting force of the liquid pair applied to the piston plate 311 is smaller than a predetermined magnitude (the second return spring is not shown in the figure).

In this embodiment, the first end and the second end of the telescopic swing link 316 are both provided with a limiting hole. The limiting buffer mechanism further comprises a first limiting column 315 and a second limiting column 318, the first limiting column 315 is inserted into the limiting hole of the second end portion and is fixedly connected with the driving disc 313, and the second limiting column 318 is inserted into the limiting hole of the first end portion and is fixedly connected with the piston plate 311. As shown in fig. 6 and 7, when the driving disc 313 rotates around the fixing shaft 411 in the counterclockwise direction from the top, the driving disc 313 drives the second end of the telescopic swing link 316 to move synchronously through the first position-limiting post 315, the first end of the telescopic swing link 316 rotates around the second position-limiting post 318, the first end of the telescopic swing link 316 contacts the fixing shaft 411, and the telescopic swing link 316 gradually compresses when the second end of the telescopic swing link 316 contacts the retaining ring 317.

In this embodiment, the side of the connection ring 110 mounted to the second pipe 400 is provided with an annular guide rail, and the side of the adjustment ring 220 facing the connection ring 110 mounted to the second pipe 400 is provided with a ring of balls 221, and the balls 221 are located in the annular guide rail, so as to reduce the friction force between the adjustment ring 220 and the connection ring 110.

In this embodiment, the blocking plate 441 is further provided with a vent valve 420 and a dust plug 430. The vent valve 420 is used for venting air to facilitate venting of air from within the connector barrel 440 as the piston plate 311 moves along the connector barrel 440. The dust plug 430 is disposed on the wall of the through hole, and contacts the first connecting rod 330 to prevent dust from entering the connecting cylinder 440.

In this embodiment, a hydraulic pipe connection device further includes a support beam 410, both ends of the support beam 410 are in contact with the wall of the connection cylinder 440, and one end of the fixing shaft 411 facing the second pipe 400 is fixedly connected to the support beam 410 for supporting the fixing shaft 411.

The working principle of the hydraulic pipeline connecting device of the embodiment is as follows: when liquid flows along the first pipeline 100 and the second pipeline 400, the liquid generates pressure on the driving ring 312, when the driving ring 312 is subjected to the pressure of the liquid, the driving ring 312 overcomes the elastic force of the first return spring 314 and moves towards one side close to the piston plate 311 relative to the retaining ring 317, the driving disc 313 is driven to rotate in the counterclockwise direction shown in fig. 6 through the screw transmission mechanism, when the driving disc 313 rotates, the first end part of the telescopic swing rod 316 is driven to be pressed with the fixed shaft 411 through the first limiting column 315 and the second limiting column 318, the second end part of the telescopic swing rod 316 is pressed with the retaining ring 317, and the telescopic swing rod 316 contracts.

When the valve is opened or closed, water in the first pipeline 100 and the second pipeline 400 impacts the pipeline wall due to the water hammer effect, the piston plate 311 is impacted by liquid and exceeds a preset value, so the piston plate can overcome the elastic force of the second return spring and move to one side far away from the second pipeline 400, when the piston plate 311 moves, the first connecting rod 330 and the second connecting rod 340 drive the adjusting rack 320 to synchronously move, the adjusting rack 320 moves to drive the adjusting ring 220 to rotate around the second pipeline 400 along the first direction through the adjusting gear 223, the adjusting ring 220 rotates to move to one side close to the connecting ring 110 arranged on the second pipeline 400 under the action of the first thread groove and the second thread groove, the pressing ring 210 is further tightened, and the sealing washer 120 is further compressed, so that the sealing performance of the connection part of the first pipeline 100 and the second pipeline 400 is better.

Further, when the liquid normally flows in the first pipe 100 and the second pipe 400, the pressure of the liquid on the piston plate 311 is a preset value, and the driving ring 312 cannot be reset under the action of the liquid, so that the piston plate 311 keeps the moved position and cannot be reset, and the sealing gasket disc is in a state of maximum stress, and the sealing effect at the joint of the first pipe 100 and the second pipe 400 is good.

When there is no more liquid in the first and

second conduits

100 and 400, the driving ring 312 and the driving disk 313 are reset by the first return spring 314, and then the adjusting rack 320 and the piston plate 311 are reset by the second return spring, and the adjusting ring 220 and the compression ring 210 return to the initial state. Specifically, since the compression of the second return spring is pushed by the piston plate 311 moving to the side away from the second conduit 400, the second return spring is released under the condition that the piston plate 311 is returned to move to the side close to the second conduit 400. And because the second end of the telescopic swing link 316 is abutted against the inner peripheral wall of the retaining ring 317, the telescopic swing link 316 does not move relative to the retaining ring 317 any more, so the driving disk 313 and the piston plate 311 are relatively fixed, and therefore the piston plate 311 can reset under the action of the second reset spring only after the driving disk 313 is separated from the piston plate 311, the driving disk 313 is separated from the piston plate 311 on the premise that the driving ring 312 is reset under the action of the first reset spring 314, so that the driving ring 312 and the driving disk 313 are reset under the action of the first reset spring 314, and then the adjusting rack 320 and the piston plate 311 are reset under the action of the second reset spring.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A hydraulic pipeline connecting device comprises two connecting rings and a sealing washer, wherein each connecting ring is fixedly connected with the connecting end of one pipeline, the two pipelines are connected through two connecting rings in a flange connection mode, and the sealing washer is arranged between the two connecting rings; taking the flowing direction of water as a first direction, and taking a pipeline at the rear side as a first pipeline and a pipeline at the front side as a second pipeline along the first direction; the method is characterized in that: the device also comprises a compression ring, an adjusting ring, a piston plate, a transmission mechanism, a limiting and buffering mechanism and a resetting mechanism; the compression ring is sleeved on the second pipeline, the compression ring is fixedly arranged on the connecting ring on the first pipeline, and a first thread groove is formed in the inner peripheral wall of the compression ring; the adjusting ring is sleeved on the second pipeline, a second thread groove in spiral fit with the first thread groove is formed in the outer peripheral wall of the adjusting ring, and the adjusting ring is configured to move towards one side close to the compression ring when rotating around the second pipeline along the first circumferential direction; connecting cylinders are fixedly mounted on two sides of the second pipeline, and the axes of the connecting cylinders are perpendicular to the axis of the second pipeline; the two piston plates are arranged in one connecting cylinder, the piston plates are in sealed sliding fit with the inner peripheral wall of the connecting cylinder, the piston plates are configured to move to one side far away from the second pipeline along the connecting cylinder when the acting force of liquid exceeds a preset value, and the transmission mechanism is used for promoting the adjusting ring to rotate around the second pipeline along the first circumferential direction when the piston plates move to one side far away from the second pipeline;

the number of the limiting buffer mechanisms is two, each limiting buffer mechanism is arranged in one connecting cylinder, and each limiting buffer mechanism comprises a baffle ring, a driving ring, a fixed shaft, a driving disc and a plurality of telescopic swing rods; the baffle ring and the connecting cylinder are coaxially arranged, and one end of the baffle ring is fixedly arranged on one side of the piston plate, which faces the second pipeline; the driving ring is positioned at the inner side of the baffle ring and is in sealing sliding fit with the baffle ring in the axial direction of the connecting cylinder, and the driving ring is configured to move to one side close to the piston plate when being acted by liquid; the fixed shaft and the baffle ring are coaxially arranged and fixedly arranged on the second pipeline; the driving ring is arranged between the fixed shaft and the driving ring and is in spiral transmission fit with the driving ring, and the driving ring is configured to rotate around the fixed shaft in a second circumferential direction when moving to one side close to the piston plate relative to the baffle ring; the plurality of telescopic swing rods are uniformly distributed around the circumference of the fixed shaft, and the telescopic swing rods are arranged in a way that after the driving coil rotates around the fixed shaft for a preset angle along the second circumference, two ends of each telescopic swing rod respectively abut against the fixed shaft and the baffle ring;

a baffle is arranged at one end of the connecting cylinder, which is far away from the second pipeline, a through hole is formed in the baffle, and the transmission mechanism comprises an adjusting gear, an adjusting rack and a connecting piece; the two adjusting racks are respectively arranged on two sides of the adjusting gear and meshed with the adjusting gear; the number of the connecting pieces is two, and each connecting piece is used for fixedly connecting one adjusting rack to the piston plate; the connecting piece comprises a first connecting rod and a second connecting rod, the first connecting rod penetrates through the through hole and is in sliding fit with the hole wall of the through hole, one end of the second connecting rod is fixedly connected with the first connecting rod, and the other end of the second connecting rod is fixedly connected with the adjusting rack;

the reset mechanism comprises a first reset spring and a second reset spring, the first reset spring is a torsion spring, the first reset spring is sleeved outside the fixed shaft, one end of the first reset spring is connected with the driving ring, and the other end of the first reset spring is connected with the driving disc; the second reset spring is sleeved on the first connecting rod and is located between the baffle plate and the piston plate, one end of the second reset spring is abutted to the piston plate, and the other end of the second reset spring is abutted to the baffle plate.

2. A hydraulic pipe connection device as claimed in claim 1, wherein: the telescopic swing rod is a spring telescopic rod, a first end portion and a second end portion are arranged at two ends of the telescopic swing rod respectively, the first end portion of the telescopic swing rod is close to the fixed shaft, the second end portion of the telescopic swing rod is close to the retaining ring, and the first end portion of the telescopic swing rod is located on the front side of the second end portion in the second circumferential direction in the initial state.

3. A hydraulic pipe connection as claimed in claim 2, wherein: the second end of the telescopic swing rod is rough, and the inner peripheral wall of the baffle ring is rough.

4. A hydraulic pipe connection as claimed in claim 2, wherein: the first end part and the second end part of the telescopic swing rod are both provided with a limiting hole; the limiting buffer mechanism further comprises a first limiting column and a second limiting column, the first limiting column is inserted into the limiting hole of the second end portion and is fixedly connected with the driving disc, and the second limiting column is inserted into the limiting hole of the first end portion and is fixedly connected with the piston plate.

5. A hydraulic pipe connection as claimed in claim 1, wherein: and one side of the connecting ring, which is arranged on the second pipeline, of the adjusting ring is provided with a circle of balls, and the balls are positioned in the annular guide rail.

6. A hydraulic pipe connection as claimed in claim 1, wherein: the baffle is also provided with a vent valve and a dustproof plug; the vent valve is used for ventilation; the dustproof plug is arranged on the hole wall of the through hole and is in contact with the first connecting rod.

7. A hydraulic pipe connection device as claimed in claim 1, wherein: the two ends of the supporting beam are in contact with the wall of the connecting cylinder, and one end, facing the second pipeline, of the fixing shaft is fixedly connected with the supporting beam.