CN111021448A - Pneumatic sealing device for side suction port of trailing suction dredger - Google Patents

Pneumatic sealing device for side suction port of trailing suction dredger Download PDF

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Publication number
CN111021448A
CN111021448A CN201911394506.4A CN201911394506A CN111021448A CN 111021448 A CN111021448 A CN 111021448A CN 201911394506 A CN201911394506 A CN 201911394506A CN 111021448 A CN111021448 A CN 111021448A
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CN
China
Prior art keywords
piston
end cover
cylinder
boss
annular groove
Prior art date
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Pending
Application number
CN201911394506.4A
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Chinese (zh)
Inventor
彭陵生
陈康
邵新
芮迪文
王坤
徐浩
李小波
刘奇
孔华杰
王立东
田效东
程东
朱文博
刘娟
施家慧
张大伟
陆小霞
汪英明
林海
李志朋
杨涛
王成革
徐景欣
吕德永
宋文轩
丁媛媛
尤巍巍
刘利娜
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Nanjing Changjiang Waterway Engineering Bureau
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Nanjing Changjiang Waterway Engineering Bureau
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing Changjiang Waterway Engineering Bureau filed Critical Nanjing Changjiang Waterway Engineering Bureau
Priority to CN201911394506.4A priority Critical patent/CN111021448A/en
Publication of CN111021448A publication Critical patent/CN111021448A/en
Priority to PCT/CN2020/086126 priority patent/WO2021134986A1/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/8833Floating installations
    • E02F3/885Floating installations self propelled, e.g. ship
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90Component parts, e.g. arrangement or adaptation of pumps

Abstract

The invention relates to the technical field of dredging engineering machinery, and discloses a pneumatic sealing device for a side suction port of a trailing suction dredger, which comprises a sliding block body, a cylinder, a piston, an end cover, a reset disc spring and an air seal; the cylinder is established in the one side of slider body towards the hull, and the cylinder bottom is equipped with the air inlet, and the piston is located the cylinder, and piston top boss is fixed with the elastic ring towards the hull on the boss, and interior outer end cover is fixed with the slider and pushes down piston boss both sides, and a plurality of reset spring of group are located between end cover inboard and the piston, and the atmoseal is located between piston and the cylinder. The invention has the advantages that: the air bag is replaced by the air cylinder piston, so that the risks of explosion, aging and mechanical damage of the air bag are avoided, and the occurrence rate of faults is reduced; the elastic ring has a certain thickness, the piston stroke compensation allowance is sufficient, the abrasion can be reduced, the elastic ring can adapt to the relative movement and the slight inclination between the sealing surfaces, and the good sealing is kept; the service life of the sealing device is greatly prolonged.

Description

Pneumatic sealing device for side suction port of trailing suction dredger
Technical Field
The invention belongs to the technical field of dredging engineering machinery, and particularly relates to a pneumatic sealing device for a side suction port of a trailing suction dredger.
Background
The existing trailing suction hopper dredger is a large self-propelled trailing suction hopper dredger equipped with a drag head excavator and a hydraulic suction device. During dredging, the harrow suction pipe is placed down along the ship board, the sliding block arranged at the upper end of the harrow suction pipe is moved to the port of the side mud suction pipe to be in butt joint with the ship body suction port, the lower end of the harrow suction pipe falls on the river/seabed, the river/seabed is broken through the self weight of the harrow head during the dragging of the ship, a sealed space is formed inside the harrow head to mix mud, and the mud is absorbed from the river/seabed through the harrow head and the mud suction pipe to enter a mud bin of the dredger under the vacuum action of a mud pump in the cabin. However, in the mud suction mode of the mud pump in the cabin, the mud water can be sucked into the cabin only by arranging the high-power mud pump due to the overlong pipeline, so that the equipment investment is large and the operation cost is high; and has no effect on the river/seabed with the depth larger than the lifting height of the dredge pump.
In order to solve the above problems, the current solution is: through arranging the dredge pump in front of the middle section of the rake suction pipe, the distance between the dredge pump and the rake head is shortened, the construction efficiency can be improved, and the operation depth of the dredger is increased. But with the attendant new problems. When the original sludge pump in the cabin is used, the harrow suction pipe sliding block and the ship body suction port are always in a negative pressure state, so that the problem of sludge and water leakage does not exist; however, the mud pump is arranged in front of the rake suction pipe, the butt joint of the rake suction pipe and the mud suction pipe is in a positive pressure state, and if no good sealing device is used for sealing the joint, the problem of muddy water leakage can be caused, and the water quality of the channel is polluted. Because the deep part of the butt joint port is underwater and needs to be sealed after butt joint, the engineering difficulty is high, and the control requirement is high. Due to the influence of the assembly clearance between the sliding block and the gunwale sliding rail, instantaneous relative motion exists between the sliding block and the suction port retaining ring at the moment when the harrow head lands, and when the ship drags the harrow suction pipe, the harrow suction pipe swings up and down and left and right when passing due to the fact that the river/seabed fluctuates and a hard and soft area exists, so that the sliding block and the ship body suction port move slightly. At present, the sliding block sealing devices designed internationally and domestically are all in an air bag type, and the device is characterized in that an annular air bag is arranged on a sliding block, the air bag is inflated after butt joint, and the air bag is sealed after expansion. However, in the actual use process, the air bag is extremely easy to damage, short in service life and frequent in replacement. The damage is mainly caused by friction breakage, improper inflation pressure and improper installation. Because the slide block and the mud suction port move relatively, the inflated air bag can be rubbed; the air bag has too low inflation pressure to play a sealing role, the long-time fatigue motion of the air bag shortens the service life when the pressure is too high, and the abrasion of the air bag can be accelerated no matter the air pressure is too high or too low; because the air bag is an elastic part and lacks of support, when the air bag is installed in the sliding block, if the air bag is not installed properly, a small part of the air bag is easy to protrude out of the sliding block, so that the sewer is damaged. At present, the problem that a plurality of design units and shipyards in the industry are all in the process of passing through is not solved all the time.
Disclosure of Invention
In order to overcome the technical problem, the invention provides a pneumatic sealing device for a suction port of a self-propelled harrow sliding block.
In order to achieve the above object, the present invention is achieved by the following means.
A pneumatic sealing device for a side suction port of a trailing suction dredger comprises a sliding block body, a cylinder, a piston, an end cover, a return spring and a pneumatic seal; the section of the cylinder is an irregular rectangular annular groove, the annular groove is arranged on one side, facing the ship body, of the sliding block body, the opening direction of the annular groove faces the ship body, the diameter of the annular groove is matched with that of a mud suction pipe of the ship body, and an air inlet is formed in the bottom of the cylinder; the piston is an annular sliding block, the bottom of the section of the piston is wider, the top of the section of the piston is provided with a boss, and the section of the piston is in a convex shape; the bottom of the piston is positioned in the cylinder, a boss at the top of the piston faces the ship body, an elastic ring is fixed on the boss, and the inner diameter, the outer diameter and the thickness of the bottom of the piston are matched with those of the cylinder groove; the end cover is divided into an inner end cover and an outer end cover, the inner end cover and the outer end cover are both circular and are connected with the slider body, the outer side of the inner end cover presses the inner side part of the piston boss, the inner side of the outer end cover presses the outer side part of the piston boss, and a gap between the inner end cover and the outer end cover is matched with the width of the piston boss; the reset springs are uniformly distributed along the circumference of the end cover, and the number of the reset springs is matched with the diameter of the mud suction pipe orifice of the ship body; two reset springs are arranged in each group, are arranged in the end cover and act on the end faces on the two sides of the piston boss; the air seal is divided into an inner air seal and an outer air seal, the inner air seal is positioned between the inner side of the bottom of the piston and the cylinder, and the outer air seal is positioned between the outer side of the bottom of the piston and the cylinder; the outer surfaces of the sliding block body and the end cover are in the same plane, and the extending distance of the piston is larger than the gap between the sliding block body and the ship body mud suction pipe opening.
The principle is as follows: after the suction pipe slide block is in butt joint with the ship body suction port, compressed air is introduced through the air inlet to push the piston to extend out, and the elastic ring on the boss at the top of the piston extrudes the suction port retaining ring to form sealing. Because the pushing piston is compressed air, the extending state of the piston is dynamic, and the piston can always cling to the suction port retaining ring for sealing in the shaking process of the rake suction pipe. When the operation is finished, the air inlet is decompressed, the piston retracts into the air cylinder under the action of the reset disc spring, and sealing is relieved. The end cover not only serves as the force application point of the reset disc spring, but also serves as a stopper of the piston, and no matter how the air inlet pressure is increased, the sealing plate of the disc spring assembly cannot be damaged by the change of the piston stroke. The elastic ring has a certain thickness, even if the suction port retaining ring is not completely parallel to the butt joint surface of the sliding block, complete sealing can be realized by extruding the elastic ring, and good sealing can be still kept even if the elastic ring is abraded to the limit thickness.
Furthermore, the number of the inner air seals is two, and the number of the outer air seals is two. Since the piston is pushed by the gas pressure, an effective gas seal is necessary. In view of better sealing of the gas, a double gas seal is used.
Furthermore, two symmetrical stop step surfaces are arranged in the cylinder, the distance between the edge of each stop step and the bottom of the cylinder is larger than the diameter of the air inlet, and the distance between the two stop steps is smaller than the width of the bottom of the piston. The distance between the edge of the stop step and the bottom of the cylinder is greater than the diameter of the air inlet, so that the air inlet pipe cannot be blocked when the piston retracts; the distance between the two stop steps is smaller than the width of the bottom of the piston, so that the piston is guaranteed to be clamped by the stop steps when retreating.
An inner framework seal is further arranged between the inner end cover and the piston boss, an inner annular groove is formed in the inner end cover, an inner stop baffle is mounted in the inner annular groove, and the inner stop baffle is tightly attached to the outer side of the inner framework seal; an outer framework seal is arranged between the outer end cover and the piston boss, an outer annular groove is formed in the outer end cover, an outer stop baffle is arranged in the outer annular groove, and the outer stop baffle is tightly attached to the outer side of the outer framework seal. The inner end cover and the boss need to bear the impact of muddy water, the pressure of the muddy water is high, and the muddy water is certainly flushed into a gap between the inner end cover and the boss, so that the reset disc spring is adversely affected. Therefore, the framework seal is arranged between the inner end cover and the boss to prevent muddy water from entering, an annular groove is formed in the end cover for fixing the framework seal, and a stop baffle similar to a snap spring is installed in the annular groove. Although high-pressure muddy water does not exist between the outer end cover and the boss, only the water pressure of the position where the mud suction pipe is located is provided, and in order to protect the disc spring assembly from being corroded by seawater, a framework seal is also arranged between the outer end cover and the boss.
Furthermore, the end cover is provided with a through hole at the position where the return spring is arranged, the bottom of the through hole is provided with a step, the top of the through hole is provided with a sealing plate, and the sealing plate is connected with the end cover through a bolt; the reset disc spring comprises a top pin, a disc spring and a clamp spring, wherein the top pin is divided into a pin rod and a pin seat in a T shape, the diameter of the pin rod is matched with the through hole, the diameter of the pin seat is matched with the step, the pin rod penetrates out of the through hole, the clamp spring is arranged at the top of the pin rod, the pin seat is tightly attached to the piston, and the four disc springs are sleeved on the pin rod in a face-to-face installation mode and located between the pin seat and the step. The disk spring can bear great load in a small space, and compared with a spring, the disk spring has larger deformation energy per unit volume and has good buffering and shock absorption capacity. The number of the groups of the reset disc springs is related to the diameter of the mud suction pipe, and when the diameter of the mud suction pipe is 500-800 mm, 8 groups of reset disc springs are matched; when the diameter is 900-1200 mm, 12 groups of reset disc springs are matched.
Furthermore, guide bearing and grinding rings are arranged on the friction surfaces of the cylinder and the piston and the end cover and the piston boss, so that the abrasion of the piston friction surface and the cylinder friction pair is reduced, and the service life is prolonged.
Further, the elastic ring is made of a self-lubricating high-molecular elastic material. Because the slide block and the suction opening retaining ring move relatively, the elastic ring and the suction opening retaining ring have small sliding friction and certain abrasion to the elastic ring, so that the abrasion degree of the self-lubricating macromolecule elastic ring can be greatly reduced, and the maintenance period is prolonged. The elastic ring has certain thickness, the compensation allowance is sufficient, and the abrasion in the stroke range of the piston does not influence the sealing effect. The high molecular elastic material is selected from one of ultra-high molecular weight polyethylene, polytetrafluoroethylene and nylon.
Has the advantages that: compared with the prior art, the invention has the advantages that:
1) the air bag is replaced by the air cylinder piston, so that the risks of air bag burst, air bag aging and air bag cutting damage by a broadside structure are completely avoided, and the occurrence rate of faults is reduced;
2) the self-lubricating polymer elastic ring at the top of the piston can effectively reduce the abrasion loss, can adapt to the relative motion and the micro-inclination between the sliding block and the suction port retaining ring and keeps good sealing;
3) the cylinder and the piston are made of rigid materials, the stroke of the piston is limited in the front and back directions, and after the elastic ring is abraded, the control air pressure is properly increased to compensate, so that the control is simplified, and the replacement and the installation are simple and convenient;
4) the piston stroke is far larger than the clearance between the sliding block and the suction port retaining ring, and the elastic ring has a certain thickness, so that the compensation allowance is sufficient, and the service life of the sealing device is greatly prolonged.
Drawings
FIG. 1 is a schematic view of a sealing device in a position within a slider;
FIG. 2 is a schematic view of the sealing device when the slide block is butted with the mud suction port;
FIG. 3 is an enlarged partial cross-sectional view of the sealing device;
FIG. 4 is a partially enlarged view of the sealing device at the inner end cap thereof;
FIG. 5 is a partially enlarged view of the outer end cap of the sealing device;
the hydraulic oil pump comprises a sliding block 11, a sliding block 12, a sealing device 13, a mud suction pipe 14, a ship body 21, a cylinder 22, a stop step 23, an air inlet 31, a piston 31, an elastic ring 32, an inner end cover 41, an outer end cover 42, an outer end cover 43, a sealing plate 51, an inner framework seal 52, an inner stop baffle 61, an outer framework seal 62, an outer stop baffle 71, a top pin 72, a disc spring 73, a snap spring 81, an inner air seal 82, an outer air seal 91 and a guide wear ring.
Detailed Description
The present invention will be described in further detail with reference to examples. The raw materials used in the invention are all commercial products.
Example 1
As shown in figures 1-5, the pneumatic sealing device for the side suction port of the trailing suction dredger comprises a sliding block 11 body, a cylinder 21, a piston 31, an end cover, a reset disc spring 72 and a pneumatic seal.
The cylinder 21 is an annular groove with a rectangular section, and is arranged on one side of the slider 11 body facing the ship body 14, the opening direction of the annular groove faces the ship body 14, the diameter of the annular groove is matched with the opening of the mud suction pipe 13 of the ship body 14, the bottom of the cylinder 21 is provided with an air inlet 23, two symmetrical stop steps 22 are arranged above the air inlet 23, the distance between the edge of each stop step 22 and the bottom of the cylinder 21 is larger than the diameter of the air inlet 23, and the distance between the two stop steps 22 is smaller than the width of the bottom of the piston.
The piston 31 is an annular sliding block, the bottom of the section of the piston is wider, and a boss is arranged at the top of the section of the piston to form a convex shape; the bottom of the piston 31 is positioned in the cylinder 21, a boss at the top of the piston 31 faces the ship body 14, an elastic ring 32 is fixed on the boss, the elastic ring 32 is made of ultra-high molecular weight polyethylene elastic ring 32, and the inner diameter, the outer diameter and the thickness of the bottom of the piston 31 are matched with the grooves of the cylinder 21.
The end cover is divided into an inner end cover 41 and an outer end cover 42, the inner end cover 42 and the outer end cover 42 are both circular rings, the inner side of the inner end cover 41 and the outer side of the outer end cover 42 are both connected with the slider 11 body, the outer side of the inner end cover 41 presses the inner side part of the boss of the piston 31, the inner side of the outer end cover 42 presses the outer side part of the boss of the piston 31, and the gap between the inner end cover 42 and the outer end cover; an inner framework seal 51 is arranged between the bosses of the inner end cover 41, an inner annular groove is formed in the inner end cover 41, an inner stop baffle 52 is installed in the inner annular groove, and the inner stop baffle 52 is tightly attached to the outer side of the inner framework seal 51; an outer framework seal 61 is arranged between the bosses of the outer end cover 42, an outer annular groove is arranged on the outer end cover 42, an outer stop baffle 62 is arranged in the outer annular groove, and the outer stop baffle 62 is tightly attached to the outer side of the outer framework seal 61. The end cover is provided with a through hole at the position of the reset disc spring, the bottom of the through hole is provided with a step, the top of the through hole is provided with a sealing plate 43, and the sealing plate 43 is connected with the end cover bolt.
Two reset disc springs are arranged in each group and are respectively positioned between the inner sides of the inner end cover 42 and the outer end cover 42 and the bottom of the piston 31. Reset dish spring includes knock pin 71, dish spring 72, jump ring 73, and knock pin 71 is divided into pin rod and key seat for "T" shape, and pin rod diameter matches with the through-hole, and key seat diameter matches with the step, and the pin rod is worn out from the through-hole, and the pin rod top sets up jump ring 73, and piston 31 is hugged closely to the key seat, and four dish springs 72 cover on the pin rod and lie in between key seat and the step with face-to-face mode. The reset disc springs are evenly distributed along the circumference of the end cover, and the number of the reset disc springs is matched with the diameter of the opening 13 of the mud suction pipe 14 of the ship body.
The air seal is divided into an inner air seal 81 and an outer air seal 82, the inner air seal 81 is positioned between the inner side of the bottom of the piston 31 and the cylinder 21, and the outer air seal 82 is positioned between the outer side of the bottom of the piston 31 and the cylinder 21; two inner air seals 81 are provided; there are two outer seals 82.
Guide wear rings 91 are arranged on friction surfaces of the cylinder 21 and the piston 31 and friction surfaces of the end cover and the piston 31. Reduce the abrasion of the friction surface of the piston 31 and prolong the service life.
The body of the slide block 11 and the outer surface of the end cover are in the same plane, and the extending distance of the piston 31 is larger than the distance between the body of the slide block 11 and the opening of the mud suction pipe 13 of the ship body 14.
Example 2
Basically the same as embodiment 1, except that it includes a slide block 11 body, a cylinder 21, a piston 31, an end cover, a return disc spring 72, and an air seal.
The cylinder 21 is an annular groove with a rectangular section, and is arranged on one side of the slider 11 body facing the ship body 14, the opening direction of the annular groove faces the ship body 14, the diameter of the annular groove is matched with the opening of the mud suction pipe 13 of the ship body 14, the bottom of the cylinder 21 is provided with an air inlet 23, two symmetrical stop steps 22 are arranged above the air inlet 23, the distance between the edge of each stop step 22 and the bottom of the cylinder 21 is larger than the diameter of the air inlet 23, and the distance between the two stop steps 22 is smaller than the width of the bottom of the piston.
The piston 31 is an annular sliding block, the bottom of the section of the piston is wider, and a boss is arranged at the top of the section of the piston to form a convex shape; the bottom of the piston 31 is positioned in the cylinder 21, a boss at the top of the piston 31 faces the ship body 14, an elastic ring 32 is fixed on the boss, the elastic ring 32 is made of polytetrafluoroethylene elastic rings 32, and the inner diameter, the outer diameter and the thickness of the bottom of the piston 31 are matched with the grooves of the cylinder 21.
The end cover is divided into an inner end cover 41 and an outer end cover 42, the inner end cover 42 and the outer end cover 42 are both circular rings, the inner side of the inner end cover 41 and the outer side of the outer end cover 42 are both connected with the slider 11 body, the outer side of the inner end cover 41 presses the inner side part of the boss of the piston 31, the inner side of the outer end cover 42 presses the outer side part of the boss of the piston 31, and a gap between the inner end cover 42 and the outer end cover.
Two reset disc springs are arranged in each group and are respectively positioned between the inner sides of the inner end cover 42 and the outer end cover 42 and the bottom of the piston 31. Reset dish spring includes knock pin 71, dish spring 72, jump ring 73, and knock pin 71 is divided into pin rod and key seat for "T" shape, and pin rod diameter matches with the through-hole, and key seat diameter matches with the step, and the pin rod is worn out from the through-hole, and the pin rod top sets up jump ring 73, and piston 31 is hugged closely to the key seat, and four dish springs 72 cover on the pin rod and lie in between key seat and the step with face-to-face mode. The reset disc springs are evenly distributed along the circumference of the end cover, and the number of the reset disc springs is matched with the diameter of the opening 13 of the mud suction pipe 14 of the ship body.
The air seal is divided into an inner air seal 81 and an outer air seal 82, the inner air seal 81 is positioned between the inner side of the bottom of the piston 31 and the cylinder 21, and the outer air seal 82 is positioned between the outer side of the bottom of the piston 31 and the cylinder 21; there are two inner air seals 81 and two outer air seals 82.
Guide wear rings 91 are arranged on friction surfaces of the cylinder 21 and the piston 31 and friction surfaces of the end cover and the piston 31. Reduce the abrasion of the friction surface of the piston 31 and prolong the service life.
The body of the slide block 11 and the outer surface of the end cover are in the same plane, and the extending distance of the piston 31 is larger than the distance between the body of the slide block 11 and the opening of the mud suction pipe 13 of the ship body 14.
Example 3
Basically the same as embodiment 1, except that it includes a slide block 11 body, a cylinder 21, a piston 31, an end cover, a return disc spring 72, and an air seal.
The cylinder 21 is an annular groove with a rectangular section, and is arranged on one side of the slider 11 body facing the ship body 14, the opening direction of the annular groove faces the ship body 14, the diameter of the annular groove is matched with the opening of the mud suction pipe 13 of the ship body 14, the bottom of the cylinder 21 is provided with an air inlet 23, two symmetrical stop steps 22 are arranged above the air inlet 23, the distance between the edge of each stop step 22 and the bottom of the cylinder 21 is larger than the diameter of the air inlet 23, and the distance between the two stop steps 22 is smaller than the width of the bottom of the piston.
The piston 31 is an annular sliding block, the bottom of the section of the piston is wider, and a boss is arranged at the top of the section of the piston to form a convex shape; the bottom of the piston 31 is positioned in the cylinder 21, a boss at the top of the piston 31 faces the ship body 14, an elastic ring 32 is fixed on the boss, the elastic ring 32 is a nylon elastic ring 32, and the inner diameter, the outer diameter and the thickness of the bottom of the piston 31 are matched with the grooves of the cylinder 21.
The end cover is divided into an inner end cover 41 and an outer end cover 42, the inner end cover 42 and the outer end cover 42 are both circular rings, the inner side of the inner end cover 41 and the outer side of the outer end cover 42 are both connected with the slider 11 body, the outer side of the inner end cover 41 presses the inner side part of the boss of the piston 31, the inner side of the outer end cover 42 presses the outer side part of the boss of the piston 31, and the gap between the inner end cover 42 and the outer end cover; an inner framework seal 51 is arranged between the bosses of the inner end cover 41, an inner annular groove is formed in the inner end cover 41, an inner stop baffle 52 is installed in the inner annular groove, and the inner stop baffle 52 is tightly attached to the outer side of the inner framework seal 51; an outer framework seal 61 is arranged between the bosses of the outer end cover 42, an outer annular groove is arranged on the outer end cover 42, an outer stop baffle 62 is arranged in the outer annular groove, and the outer stop baffle 62 is tightly attached to the outer side of the outer framework seal 61. The end cover is provided with a through hole at the position of the reset disc spring, the bottom of the through hole is provided with a step, the top of the through hole is provided with a sealing plate 43, and the sealing plate 43 is connected with the end cover bolt.
Two reset disc springs are arranged in each group and are respectively positioned between the inner sides of the inner end cover 42 and the outer end cover 42 and the bottom of the piston 31. Reset dish spring includes knock pin 71, dish spring 72, jump ring 73, and knock pin 71 is divided into pin rod and key seat for "T" shape, and pin rod diameter matches with the through-hole, and key seat diameter matches with the step, and the pin rod is worn out from the through-hole, and the pin rod top sets up jump ring 73, and piston 31 is hugged closely to the key seat, and four dish springs 72 cover on the pin rod and lie in between key seat and the step with face-to-face mode. The reset disc springs are evenly distributed along the circumference of the end cover, and the number of the reset disc springs is matched with the diameter of the opening 13 of the mud suction pipe 14 of the ship body.
The air seal is divided into an inner air seal 81 and an outer air seal 82, the inner air seal 81 is located between the inner side of the bottom of the piston 31 and the cylinder 21, and the outer air seal 82 is located between the outer side of the bottom of the piston 31 and the cylinder 21.
Guide wear rings 91 are arranged on friction surfaces of the cylinder 21 and the piston 31 and friction surfaces of the end cover and the piston 31. Reduce the abrasion of the friction surface of the piston 31 and prolong the service life.
The body of the slide block 11 and the outer surface of the end cover are in the same plane, and the extending distance of the piston 31 is larger than the distance between the body of the slide block 11 and the opening of the mud suction pipe 13 of the ship body 14.
The present invention has been described in terms of the above embodiments, and it should be understood that the above embodiments are not intended to limit the present invention in any way, and all technical solutions obtained by using equivalents or equivalent changes fall within the protection scope of the present invention.

Claims (6)

1. A pneumatic sealing device for a side suction port of a trailing suction dredger is characterized by comprising a sliding block body, a cylinder, a piston, an end cover, a return spring and an air seal;
the section of the cylinder is an irregular rectangular annular groove, the annular groove is arranged on one side, facing the ship body, of the sliding block body, the opening direction of the annular groove faces the ship body, the diameter of the annular groove is matched with that of a mud suction pipe of the ship body, and an air inlet is formed in the bottom of the cylinder;
the piston is an annular sliding block, the bottom of the section of the piston is wider, the top of the section of the piston is provided with a boss, and the section of the piston is in a convex shape; the bottom of the piston is positioned in the cylinder, a boss at the top of the piston faces the ship body, an elastic ring is fixed on the boss, and the inner diameter, the outer diameter and the thickness of the bottom of the piston are matched with those of the cylinder groove;
the end cover is divided into an inner end cover and an outer end cover, the inner end cover and the outer end cover are both circular and are connected with the slider body, the outer side of the inner end cover presses the inner side part of the piston boss, the inner side of the outer end cover presses the outer side part of the piston boss, and a gap between the inner end cover and the outer end cover is matched with the width of the piston boss;
the reset springs are uniformly distributed along the circumference of the end cover, and the number of the reset springs is matched with the diameter of the mud suction pipe orifice of the ship body; two reset springs are arranged in each group, are arranged in the end cover and act on the end faces on the two sides of the piston boss;
the air seal is divided into an inner air seal and an outer air seal, the inner air seal is positioned between the inner side of the bottom of the piston and the cylinder, and the outer air seal is positioned between the outer side of the bottom of the piston and the cylinder;
the outer surfaces of the sliding block body and the end cover are in the same plane, and the extending distance of the piston is larger than the gap between the sliding block body and the ship body mud suction pipe opening.
2. The pneumatic sealing device for the broadside suction port of the trailing suction hopper as claimed in claim 1, wherein there are two inner air seals and two outer air seals.
3. The pneumatic sealing device for the broadside suction port of the trailing suction hopper dredger as claimed in claim 1, wherein two symmetrical stopping steps are arranged in the cylinder, the distance from the edge of each stopping step to the bottom of the cylinder is larger than the diameter of the air inlet, and the distance between the two stopping steps is smaller than the width of the bottom of the piston.
4. The pneumatic sealing device for the broadside suction port of the trailing suction hopper as claimed in claim 1, wherein an inner frame seal is arranged between the inner end cap and the piston boss, an inner annular groove is formed in the inner end cap, an inner stop baffle is arranged in the inner annular groove, and the inner stop baffle is tightly attached to the outer side of the inner frame seal; an outer framework seal is arranged between the outer end cover and the piston boss, an outer annular groove is formed in the outer end cover, an outer stop baffle is mounted in the outer annular groove, and the outer stop baffle is tightly attached to the outer side of the outer framework seal.
5. The pneumatic sealing device for the broadside suction port of the trailing suction hopper as claimed in claim 1, wherein the end cap is provided with a through hole at the position where the return spring is arranged, the bottom of the through hole is provided with a step, the top of the through hole is provided with a sealing plate, and the sealing plate is connected with the end cap through a bolt; the reset disc spring comprises a top pin, a disc spring and a clamp spring, wherein the top pin is divided into a pin rod and a pin seat in a T shape, the diameter of the pin rod is matched with the through hole, the diameter of the pin seat is matched with the step, the pin rod penetrates out of the through hole, the clamp spring is arranged at the top of the pin rod, the pin seat is tightly attached to the piston, and the four disc springs are sleeved on the pin rod in a face-to-face installation mode and located between the pin seat and the step.
6. The pneumatic sealing device for the broadside suction port of the trailing suction hopper dredger according to claim 1, wherein the elastic ring is a self-lubricating polymer elastic ring.
CN201911394506.4A 2019-12-30 2019-12-30 Pneumatic sealing device for side suction port of trailing suction dredger Pending CN111021448A (en)

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CN201911394506.4A CN111021448A (en) 2019-12-30 2019-12-30 Pneumatic sealing device for side suction port of trailing suction dredger
PCT/CN2020/086126 WO2021134986A1 (en) 2019-12-30 2020-04-22 Trailing suction hopper dredger broadside suction port pneumatic sealing apparatus

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021134986A1 (en) * 2019-12-30 2021-07-08 长江南京航道工程局 Trailing suction hopper dredger broadside suction port pneumatic sealing apparatus

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7513536B2 (en) * 2004-09-07 2009-04-07 S & B Technical Products, Inc. Pipe gasket with selective economy of scale
DE202007007412U1 (en) * 2007-04-19 2007-08-16 Arthur Habermann Gmbh & Co. Kg Dredger includes float carrying pumping unit divided into hydraulic section below water level and drive motor above it, with articulated dredging pipe raised and lowered by winch
CN102794282B (en) * 2012-08-31 2014-05-21 富威科技(吴江)有限公司 Isobaric inflatable seal joint device for cleaning internal wall of tube
CN203782771U (en) * 2014-04-15 2014-08-20 广州文冲船厂有限责任公司 Trailing suction hopper dredger broadside sucking opening sealing device
CN104279384B (en) * 2014-10-29 2016-03-16 爱发科东方真空(成都)有限公司 High reliability helium leak test special joint
CN105003713B (en) * 2015-08-11 2017-10-24 宁波恒元精工管阀科技有限公司 A kind of ball valve sealing end cap
CN109653272B (en) * 2018-11-20 2021-05-11 广州文冲船厂有限责任公司 Harrow pipe butt joint sealing structure of trailing suction hopper dredger
CN111021448A (en) * 2019-12-30 2020-04-17 长江南京航道工程局 Pneumatic sealing device for side suction port of trailing suction dredger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021134986A1 (en) * 2019-12-30 2021-07-08 长江南京航道工程局 Trailing suction hopper dredger broadside suction port pneumatic sealing apparatus

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