CN115823394A - Damping device for pipeline joint - Google Patents

Abstract

The invention discloses a damping device for a pipeline joint, which belongs to the technical field of damping devices and comprises a bent pipeline, a linear pipeline and a damping box arranged at the joint of the bent pipeline and the linear pipeline; be equipped with water damper in the surge tank, damping unit and drive unit mutually support through the three, work as along with the increase of water yield, drive ball is released gradually through sheltering from the unit, outwards push the driving block, and make first trapezoidal block gradually block into hou mian triangle draw-in groove, it is shorter to shorten the distance of driving block and snubber block contact, the vibration power that the driving block produced with the snubber block contact can be bigger, thereby further increase the neutralization to aquatic products's impact, a plurality of drive ball stacks through the release are in the same place, make the shock attenuation grade increase from the one-level to the level four gradually, thereby neutralization water makes the impact of straight line pipeline and turning way junction not hard up and produce the condition emergence of leaking.

Description

Damping device for pipeline joint

Technical Field

The invention belongs to the technical field of damping devices, and particularly relates to a damping device for a pipeline joint.

Background

In order to carry the water source, need use the pipeline, the pipeline is often pre-buried in the underground, when taking place the earthquake, the vibrations that the earthquake produced are very big to the influence of pipeline, lead to the pipeline to break very easily and leak, utilize pipeline damping device to carry out the shock attenuation to the pipeline on the market, thereby avoid the pipeline to break and take place to leak water, but pipeline damping device's among the prior art damping mode is more to the impact that outside vibrations produced the pipeline outer wall and carry out the shock attenuation, when external vibrations make the interior aquatic of flowing of pipeline produce the influence, can make water striking pipeline inner wall and produce vibrations, above-mentioned pipeline damping device can not this vibrations carry out the shock attenuation.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a damping device for a pipe joint, so as to solve the technical problem that the damping device for a pipe in the prior art cannot damp the vibration generated by water hitting the inner wall of the pipe.

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

the invention provides a damping device for a pipeline joint, which comprises a bent pipeline, a linear pipeline and a damping box arranged at the joint of the bent pipeline and the linear pipeline; a plurality of water damping mechanisms arrayed on the periphery of the linear pipeline are arranged in the damping box; each water damping mechanism comprises a circular plate capable of rotating; a plurality of radial first sliding grooves and second sliding grooves are formed in the circular array in the circular plate; each first sliding chute penetrates through the peripheral side of the circular plate; each second sliding groove and the corresponding first sliding groove are positioned on the same straight line; sliding plates are arranged on two sides of each first sliding chute; a transmission block is connected between the two sliding plates in a sliding way; a plurality of driving balls which are arranged in the same straight line are arranged in the second sliding groove; the driving ball can enable the transmission block to gradually extend out of the first sliding chute; the sliding plate is connected with the first sliding chute through a first air cylinder; the first sliding groove and the second sliding groove are communicated through the shielding unit; the outer wall of the linear pipeline is provided with a damping unit; the damping unit comprises four damping plates which are enclosed into a square shape and damping blocks which are arranged between the damping plates in a sliding manner; two opposite damping plates are connected with the linear pipeline in a sliding mode through a second cylinder; the transmission block can enable the damping block to gradually approach the outer wall of the linear pipeline; the inner wall of the linear pipeline is provided with a contact block; one end of the contact block, which is positioned outside the linear pipeline, is connected with a driving unit for driving the circular plate to rotate; the contact block can sense the flow velocity of water in the linear pipeline and can control the rotating speed of the driving unit.

Further, the shielding unit comprises an inner rotary disc which is coaxially and rotatably connected with the circular plate; a plurality of connecting strips are uniformly arranged on the periphery of the turntable; the connecting strip is connected with an arc-shaped baffle; a plurality of arc-shaped grooves are formed in the circular plate; each arc-shaped groove is positioned between the corresponding first sliding groove and the corresponding second sliding groove; each arc-shaped baffle is connected in the arc-shaped groove in a sliding mode and can separate the first sliding groove and the second sliding groove.

Further, the driving unit includes a connecting rod connected with the contact block; the connecting rod is connected with a first motor; the first motor is connected with a first bevel gear; a second bevel gear meshed with the first bevel gear is coaxially fixed on one side of the circular plate close to the first bevel gear; the second bevel gear is connected with the inner wall of the damping box through a fixing strip.

Furthermore, a plurality of first dampers are uniformly hinged on the periphery of the elbow pipeline; the free end of the first damper is hinged with the inner side wall of the shock absorption box; an inner damping mechanism is arranged between the linear pipeline and the elbow pipeline; the inner damping mechanism comprises a circular ring sleeved between the linear pipeline and the elbow pipeline; the circular ring is connected with a plurality of arc blocks in a sliding way; the adjacent arc-shaped blocks are connected through a second damper; two sides of each arc-shaped block are respectively hinged with the corresponding elbow pipeline and the corresponding linear pipeline through a third damper and a fourth damper; resistance units are arranged between every two adjacent fourth dampers and comprise fan-shaped blocks; the two ends of the fan-shaped block are provided with fan-shaped grooves; a fan-shaped bar is connected in the fan-shaped groove in a sliding manner through a fifth damper; the free ends of the fan-shaped bars are hinged with the corresponding fourth dampers.

Furthermore, resistance grooves communicated with the corresponding sector grooves are formed in the peripheral sides of the sector blocks; a resisting rod is rotatably connected in the resisting groove; the side wall of the resisting rod is connected with the peripheral side of the fan-shaped block through a first tension spring; the free end of the resisting rod is symmetrically connected with a clamping block and a first hook block; a second hook block is rotationally connected in the resisting groove; one end of the second hook block can be hooked with the first hook block, and the other end of the second hook block extends into the fan-shaped groove; a fixed block is arranged in the resisting groove; the second hook block is connected with the fixed block through a second tension spring; a clamping groove is formed in the inner peripheral side of the arc-shaped block; and a damping block is connected in the clamping groove through a sixth damper.

The invention has the beneficial effects that:

1. along with the increase of the water yield, the impact force in the water impact straight line pipeline is further increased by the earthquake, the driving balls are gradually released through the shielding units, the driving block is pushed outwards, the first trapezoidal block is gradually clamped into the triangular clamping groove at the back, the contact distance between the driving block and the damping block is shortened to be shorter, the damping block reaches the limit position and cannot move inwards to consume energy, the vibration force generated by the contact between the driving block and the damping block is larger, the neutralization of the impact force generated to water is further increased, the plurality of released driving balls are stacked together, the damping grade is gradually increased from one grade to four grades, the impact force generated by the water on the inner wall of the straight line pipeline is neutralized, and the situation that the joint of the straight line pipeline and the elbow bend is loosened to generate water leakage can be effectively avoided.

2. Through shortening the time that cowl blocked the second spout, can slide into first spout under the effect of centrifugal force with four drive balls fast, make the shock attenuation level promote the level four from the zero order in the twinkling of an eye to avoid making the highest situation of impact of straight line pipeline water-logging because of the volume increase suddenly of the water in the straight line pipeline, and then effectively avoid the proruption situation.

3. The dampers are mutually matched to gradually consume earthquake force, the resistance rod rotates and bounces, the fixture block limits the sliding of the arc-shaped block through the damping block, and therefore the energy consumption of the arc-shaped block is enhanced through the rear energy consumption, the energy consumption is further improved, the situation that the joint of the straight line pipeline and the elbow pipeline is shaken and gradually loosened, and the water leakage is caused due to the fact that the damper breaks is effectively avoided.

Additional advantages, objects, and features of the invention will be set forth in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof.

Drawings

In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:

FIG. 1 is a view of an application scenario of the shock absorbing device of the present invention;

FIG. 2 is a connection diagram of the water damper device of the present invention with a linear pipe;

FIG. 3 is another perspective view of the water damper assembly of the present invention in connection with a linear conduit;

FIG. 4 is a three-dimensional view of the internal mechanism of the circular plate of the present invention;

FIG. 5 is a longitudinal cross-sectional view of the drive block of the present invention;

FIG. 6 is a three-dimensional view of the connection of a second cylinder to a damping plate according to the present invention;

FIG. 7 is a longitudinal cross-sectional view of a snubber block of the present invention;

FIG. 8 is a three-dimensional view of the inner damping mechanism of the present invention;

FIG. 9 is a partial cross-sectional view of a segment of the present invention;

FIG. 10 is an enlarged view of a portion of the invention at A in FIG. 9;

fig. 11 is a partial cross-sectional view of an arcuate plate of the present invention.

The drawings are numbered as follows: the damper comprises a curved pipeline 1, a linear pipeline 2, a damper box 3, a circular plate 4, a sliding plate 5, a transmission block 6, a driving groove 7, a driving ball 8, a triangular clamping groove 9, a first trapezoidal block 10, a first air cylinder 11, a damper plate 12, a damper block 13, a second air cylinder 14, a second trapezoidal block 15, a contact block 16, a connecting bar 17, an arc-shaped baffle plate 18, a connecting bar 19, a first motor 20, a fixing bar 21, a first damper 22, an arc-shaped block 23, a third damper 24, a fourth damper 25, a fan-shaped block 26, a fifth damper 27, a resisting groove 28, a resisting bar 29, a first tension spring 30, a clamping block 31, a first hook block 32, a second hook block 33, a second tension spring 34 and a damping block 35.

Detailed Description

As shown in fig. 1 to 11, the present invention provides a damping device for a pipe joint, which comprises a bent pipe 1, a linear pipe 2 and a damping box 3 arranged at the joint of the bent pipe 1 and the linear pipe; a plurality of water damping mechanisms arrayed on the periphery of the linear pipeline 2 are arranged in the damping box 3, and one water damping mechanism is taken as an example in the embodiment; as shown in fig. 2 to 4, the water damper mechanism includes a circular plate 4 capable of rotating; the circular array in the circular plate 4 is provided with four radial first sliding chutes and second sliding chutes; each first chute penetrates through the peripheral side of the circular plate 4; each second sliding groove and the corresponding first sliding groove are positioned on the same straight line; sliding plates 5 are arranged on two sides of each first sliding chute; a transmission block 6 is connected between the two sliding plates 5 in a sliding manner along the radial direction; the side wall of each first sliding chute is provided with a driving chute 7 in the same direction; the driving groove 7 is internally connected with a driving block through a driving tension spring; the top wall of the driving block is connected with the bottom wall of the corresponding transmission block 6; four driving balls 8 which are arranged in the same straight line are arranged in the second sliding groove;

as shown in fig. 5, four triangular clamping grooves 9 are vertically formed on the opposite side walls of the two sliding plates 5; the left side wall and the right side wall of the transmission block 6 are both provided with transmission grooves; a first trapezoidal block 10 is connected in the transmission groove through a transmission spring; when the transmission block 6 moves upwards, the transmission block 6 can gradually slide outwards through the first trapezoid block 10 and is clamped with the corresponding triangular clamping groove 9; when the circular plate 4 rotates, the centrifugal force enables the driving ball 8 to roll towards the driving block 6, so that the driving force is transmitted to the driving block 6, and the driving block 6 gradually extends out of the first sliding groove; the sliding plate 5 is connected with the side wall of the first sliding chute through a first air cylinder 11, and a telescopic shaft of the first air cylinder 11 is vertically connected with the side wall of the sliding plate 5; the first sliding groove and the second sliding groove are communicated through the shielding unit;

as shown in fig. 3 and 6, the outer wall of the linear pipeline 2 is provided with a damping unit; the damping unit comprises four damping plates 12 which are enclosed into a square shape and a damping block 13 which is arranged between the damping plates 12 in a sliding way; wherein, the two damping plates 12 in the left and right directions are vertically connected with the peripheral side of the linear pipeline 2; wherein, the outer sides of the two damping plates 12 positioned in the up-down direction are provided with a second cylinder 14; the second cylinder 14 is connected with the side wall of the linear pipeline 2 along the direction vertical to the axis of the linear pipeline, and the telescopic shaft of the second cylinder 14 is vertically connected with the damping plate 12 corresponding to the up-down direction;

as shown in fig. 7, the upper and lower damper plates 12 are opened with two triangular grooves in the horizontal direction facing the side walls; the upper side wall and the lower side wall of the damping block 13 are vertically provided with damping grooves; a second trapezoidal block 15 is connected in the damping groove through a stretching spring; when the damping block 13 slides leftwards, the damping block can gradually slide out of the damping groove through the second trapezoid block 15 and be clamped with the corresponding triangle groove; the damper block 13 is slidably connected between the damper plates 12 in the left-right direction by damper springs provided on the circumferential side of the linear duct 2; the cross sections of the transmission block 6 and the damping block 13 are both wedge-shaped; when the transmission block 6 is in contact with the damping block 13, the damping block 13 can gradually slide inwards, and the second trapezoidal block 15 can gradually slide out of the damping groove and be clamped with the corresponding triangular groove;

as shown in fig. 2, the inner wall of the linear pipeline 2 is provided with a contact block 16 in a penetrating way; one end of the contact block 16, which is positioned outside the linear pipeline 2, is connected with a driving unit for driving the circular plate 4 to rotate; the upper side wall of the contact block 16 is provided with a sensor (not shown in the figure), the inside of the contact block 16 is provided with a controller (not shown in the figure), the sensor can sense the flow volume of water in the linear pipeline 2, and the controller can control the rotating speed of the driving unit.

The principle and the effect of the technical scheme are as follows:

as shown in fig. 2, when the water is delivered up and down, the water flow will contact with the upper sidewall of the contact block 16, and when the sensor senses the flow rate of the water, the controller controls the driving unit to generate power to drive the circular plate 4 to rotate clockwise (as shown in fig. 3); the transmission block 6 is driven to slide out under the action of centrifugal force and is clamped to the corresponding nearest triangular clamping groove 9 through the first trapezoidal block 10; when the circular plate 4 rotates, each transmission block 6 is in contact with the damping block 13 on the linear pipeline 2 and vibrates, so that the neutralized water collides with the vibration generated by the pipeline from the inside of the linear pipeline 2, and meanwhile, when the transmission blocks 6 are in contact with the damping blocks 13, due to wedge-shaped matching, the damping blocks 13 can be pushed to slide inwards to form a grid, and the second trapezoidal block 15 is clamped into the nearest triangular groove to form primary damping.

When the water conveyed in the linear pipeline 2 is gradually increased to one fourth of the sectional area of the linear pipeline 2, the volume of the water flowing in the linear pipeline 2 is increased, and the impact force of the water driven by an earthquake to impact the linear pipeline 2 is increased; when the sensor senses that the volume is increased, the power of the driving unit is accelerated through the controller, because the centrifugal force applied to the driving block 6 is limited, and the driving block cannot slide outwards any more, one driving ball 8 is released through the shielding unit, the driving ball 8 slides into the first sliding groove through the second sliding under the action of the centrifugal force and strikes the driving block 6, so that the driving block 6 continues to extend outwards, meanwhile, when the circular plate 4 rotates, the driving block 6 and the damping block 13 are located on the same straight line, the driving block 6 is in closer contact with the damping block 13, so that larger impact force for neutralizing water is generated, meanwhile, when the driving block 6 is in contact with the damping block 13, the damping block 13 continues to be pushed inwards, so that the second trapezoidal block 15 is clamped into the triangular groove at the innermost end, and secondary damping is formed.

If water increases gradually to the half of straight line pipeline 2, along with the increase of water yield, the impact that the earthquake drove water striking straight line pipeline 2 in can further increase, release a drive ball 8 through sheltering from the unit once more, continue to extrapolate driving block 6, and make first trapezoidal piece 10 card go into third triangle draw-in groove 9, the distance of driving block 6 and snubber block 13 contact is shorter this moment, because snubber block 13 reachs extreme position, can not inwards move again and consume energy, the vibration power that driving block 6 and snubber block 13 contact produced can be bigger, thereby further increase the neutralization to the impact that aquatic was produced, form tertiary shock attenuation.

If water increases gradually to cover the sectional area size of sharp pipeline 2 completely, the influence of earthquake to water this moment is the biggest, make water get the impact force the biggest to sharp pipeline 2 inner wall, release a drive ball 8 through sheltering from the unit at last, continue to push driving block 6 outwards, and make first trapezoidal piece 10 card go into last triangle draw-in groove 9, the distance of driving block 6 and snubber block 13 contact this moment is shorter, because snubber block 13 reachs extreme position, can not inwards move again and consume energy, the vibration power that driving block 6 and snubber block 13 contact produced can be bigger, thereby further increase the neutralization to aquatic impact power, form the level four shock attenuation.

The drive ball 8 with shelter from the unit cooperation, can form the shock attenuation mode from one-level to level four gradually, the impact of effectual neutralization water to 2 inner walls of straight line pipeline, the impact that can effectively avoid water to produce makes the straight line pipeline 2 not hard up and the condition emergence that produces and leak with elbow pipeline 1 junction.

In this embodiment, as shown in fig. 4, the shielding unit includes an inner turntable coaxially and rotatably connected to the circular plate 4 by a shielding motor; a shielding groove (not shown in the figure) is arranged at the center of the front side wall of the circular plate 4; the shielding motor is coaxially arranged in the shielding groove; four connecting strips 17 are uniformly arranged on the periphery of the turntable; the side wall of the connecting strip 17 close to the circular plate 4 is connected with an arc-shaped baffle plate 18; a plurality of arc-shaped grooves are formed in the circular plate 4; each arc-shaped groove is positioned between the corresponding first sliding groove and the corresponding second sliding groove; each of the arc-shaped baffles 18 is slidably connected in the arc-shaped groove and can separate the first sliding groove from the second sliding groove.

The principle and the effect of the technical scheme are as follows:

when a driving ball 8 needs to be released, the driving ball 8 drives the arc-shaped baffle plate 18 to rotate anticlockwise through the shielding motor, the driving ball 8 slides into the first sliding groove and pushes the transmission block 6 under the action of centrifugal force after being separated from the blocking of the arc-shaped baffle plate 18, and the shielding motor is controlled to rotate clockwise after the driving ball 8 slides out of the second sliding groove, so that the arc-shaped baffle plate 18 continues to block the second sliding groove.

Through shortening the time that cowl 18 blocked the second spout, can slide into first spout with four drive balls 8 under the effect of centrifugal force fast, make the shock attenuation level promote the level four from the zero level in the twinkling of an eye to avoid making the highest situation of impact of water in the straight line pipeline 2 because of the volume increase suddenly of the water in the straight line pipeline 2, and then effectively avoid emergency.

In the present embodiment, as shown in fig. 2, the driving unit includes a connecting rod 19 connected to the right side wall of the contact block 16; the connecting rod 19 is vertically connected with a first motor 20; the first motor 20 is connected with a first bevel gear; a second bevel gear meshed with the first bevel gear is coaxially fixed on one side of the circular plate 4 close to the first bevel gear; the second bevel gear is connected with the inner wall of the damper box 3 through a fixing strip 21.

The principle and the effect of the technical scheme are as follows:

when the sensor senses water flow, the controller controls the first motor 20 to drive the first bevel gear to rotate clockwise around the first motor 20, so as to drive the circular plate 4 to rotate clockwise through the second bevel gear (as shown in fig. 3).

In the present embodiment, as shown in fig. 8, four first dampers 22 are evenly hinged to the outer peripheral side of the elbow pipe 1; the free end of the first damper 22 is hinged with the inner side wall of the shock absorption box 3; an inner damping mechanism is arranged between the linear pipeline 2 and the elbow pipeline 1; the inner damping mechanism comprises a circular ring sleeved between the linear pipeline 2 and the elbow pipeline 1; the circular ring is connected with four arc blocks 23 in a sliding way; the adjacent arc blocks 23 are connected through a second damper (not shown in the figure); two sides of each arc-shaped block 23 are respectively hinged with the corresponding elbow pipeline 1 and the corresponding linear pipeline 2 through a third damper 24 and a fourth damper 25; resistance units are arranged between every two adjacent fourth dampers 25 and comprise fan-shaped blocks 26; the two ends of the sector block 26 are provided with sector grooves; a fan-shaped bar is connected in the fan-shaped groove in a sliding way through a fifth damper 27; the free ends of the fan-shaped bars are hinged with the corresponding fourth dampers 25.

The principle and the effect of the technical scheme are as follows:

when an earthquake occurs, the joint of the straight pipeline 2 and the elbow pipeline 1 is shaken and gradually loosened, so that water leakage is caused due to rupture, and in order to solve the problem, when the earthquake occurs, the force transmitted to the shock absorption box 3 by the earthquake consumes energy through the first damper 22, so that primary energy consumption is formed; if the first damper 22 is not enough to consume, the turning pipeline 1 is rotated through the first damper 22, the counterclockwise rotation is taken as an example in the embodiment to explain, the counterclockwise rotation of the turning pipeline 1 causes the third damper 24 to consume energy to form secondary energy consumption, and when the energy is not consumed, the third damper 24 drives the arc-shaped blocks 23 to slide counterclockwise on the circular ring to cause the second dampers between the arc-shaped blocks 23 to consume energy to form tertiary energy consumption; at the same time, the fourth damper 25 consumes energy, resulting in four-stage energy consumption.

In the present embodiment, as shown in fig. 8 to 11, the outer peripheral sides of the segments 26 near both ends are each provided with a resisting groove 28 communicating with the corresponding segment groove; a resistance rod 29 is rotatably connected in the resistance groove 28; the upper side wall of the resistance lever 29 is connected to the peripheral side of the sector 26 by a first tension spring 30; the free end of the resisting rod 29 is symmetrically connected with a clamping block 31 and a first hook block 32; a second hook block 33 is rotatably connected between the front and rear side walls of the resisting groove 28; the bent end of the second hook block 33 can be hooked with the first hook block 32, and the straight end of the second hook block extends into the fan-shaped groove; a fixed block is arranged above the bent end in the resisting groove 28; the second hook block 33 is connected with the fixed block through a second tension spring 34; as shown in fig. 11, the inner peripheral side of the arc block 23 near the two ends is provided with a slot, and the cross section of the slot is in an inverted T shape; an inverted T-shaped damping block 35 is connected to the clamping groove through a sixth damper.

The principle and the effect of the technical scheme are as follows:

when the four-stage energy consumption is not enough, the earthquake force can also cause the fan-shaped strips to extrude the fifth damper 27 inwards, when the fan-shaped strips slide in the fan-shaped grooves, the straight line ends of the second hook blocks 33 can be pushed, so that the bent ends release the constraint on the first hook blocks 32, the fixed rod is driven by the second tension spring 34 to rotate clockwise to the radial direction of the fan-shaped blocks 26, and when the arc-shaped blocks 23 slide anticlockwise on the circular ring, the fixture blocks 31 on the resisting rod 29 are clamped into the clamping grooves; so that the latch block 31 blocks the damping block 35 from sliding counterclockwise and consumes energy through the fifth damper 27.

The dampers are mutually matched to gradually consume seismic force, after the resistance rod 29 rotates and bounces, the fixture block 31 limits the sliding of the arc-shaped block 23 through the damping block 35, so that the energy consumption of the arc-shaped block 23 is enhanced through the later energy consumption, the energy consumption is further improved, the situation that the joint of the linear pipeline 2 and the elbow pipeline 1 is shaken and gradually loosened, and the water leakage is caused due to the breakage is effectively avoided.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims (5)

1. A damping device for pipe joints which characterized in that: comprises a bent pipeline, a linear pipeline and a damping box arranged at the joint of the bent pipeline and the linear pipeline; a plurality of water damping mechanisms arrayed on the periphery of the linear pipeline are arranged in the damping box; each water damping mechanism comprises a circular plate capable of rotating; a plurality of radial first sliding grooves and second sliding grooves are formed in the circular array in the circular plate; each first sliding chute penetrates through the peripheral side of the circular plate; each second sliding groove and the corresponding first sliding groove are positioned on the same straight line; sliding plates are arranged on two sides of each first sliding chute; a transmission block is connected between the two sliding plates in a sliding way; a plurality of driving balls which are arranged in the same straight line are arranged in the second sliding groove; the driving ball can enable the transmission block to gradually extend out of the first sliding chute; the sliding plate is connected with the first sliding chute through a first air cylinder; the first sliding groove and the second sliding groove are communicated through the shielding unit; the outer wall of the linear pipeline is provided with a damping unit; the damping unit comprises four damping plates which are enclosed into a square shape and damping blocks which are arranged between the damping plates in a sliding manner; two opposite damping plates are connected with the linear pipeline in a sliding mode through a second cylinder; the transmission block can enable the damping block to gradually approach the outer wall of the linear pipeline; the inner wall of the linear pipeline is provided with a contact block; one end of the contact block, which is positioned outside the linear pipeline, is connected with a driving unit for driving the circular plate to rotate; the contact block can sense the flow velocity of water in the linear pipeline and can control the rotating speed of the driving unit.

2. A shock absorbing device for a pipe joint according to claim 1, wherein: the shielding unit comprises an inner rotary disc which is coaxially and rotatably connected with the circular plate; a plurality of connecting strips are uniformly arranged on the periphery of the turntable; the connecting strip is connected with an arc-shaped baffle; a plurality of arc-shaped grooves are formed in the circular plate; each arc-shaped groove is positioned between the corresponding first sliding groove and the corresponding second sliding groove; each arc-shaped baffle is connected in the arc-shaped groove in a sliding mode and can separate the first sliding groove and the second sliding groove.

3. A shock absorbing device for a pipe joint according to claim 2, wherein: the driving unit comprises a connecting rod connected with the contact block; the connecting rod is connected with a first motor; the first motor is connected with a first bevel gear; a second bevel gear meshed with the first bevel gear is coaxially fixed on one side of the circular plate close to the first bevel gear; the second bevel gear is connected with the inner wall of the damping box through a fixing strip.

4. A shock absorbing device for a pipe joint according to claim 3, wherein: a plurality of first dampers are uniformly hinged on the periphery of the bent pipeline; the free end of the first damper is hinged with the inner side wall of the shock absorption box; an inner damping mechanism is arranged between the linear pipeline and the elbow pipeline; the inner damping mechanism comprises a circular ring sleeved between the linear pipeline and the elbow pipeline; the circular ring is connected with a plurality of arc blocks in a sliding way; the adjacent arc-shaped blocks are connected through a second damper; the two sides of each arc-shaped block are respectively hinged with the corresponding elbow pipeline and the corresponding linear pipeline through a third damper and a fourth damper; resistance units are arranged between every two adjacent fourth dampers and comprise fan-shaped blocks; the two ends of the fan-shaped block are provided with fan-shaped grooves; a fan-shaped bar is connected in the fan-shaped groove in a sliding manner through a fifth damper; the free ends of the fan-shaped strips are hinged with the corresponding fourth dampers.

5. A shock absorbing device for a pipe joint according to claim 4, wherein: resistance grooves communicated with the corresponding fan-shaped grooves are formed in the peripheral sides of the fan-shaped blocks; a resisting rod is rotatably connected in the resisting groove; the side wall of the resisting rod is connected with the peripheral side of the fan-shaped block through a first tension spring; the free end of the resisting rod is symmetrically connected with a clamping block and a first hook block; a second hook block is rotationally connected in the resisting groove; one end of the second hook block can be hooked with the first hook block, and the other end of the second hook block extends into the fan-shaped groove; a fixed block is arranged in the resisting groove; the second hook block is connected with the fixed block through a second tension spring; a clamping groove is formed in the inner peripheral side of the arc-shaped block; and a damping block is connected in the clamping groove through a sixth damper.

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