CN215630258U - Drag head for digging clay - Google Patents
Drag head for digging clay Download PDFInfo
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- CN215630258U CN215630258U CN202120537383.1U CN202120537383U CN215630258U CN 215630258 U CN215630258 U CN 215630258U CN 202120537383 U CN202120537383 U CN 202120537383U CN 215630258 U CN215630258 U CN 215630258U
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- rake
- movable cover
- water tank
- fixed body
- pressure
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Abstract
Drag head for excavating clay comprising: the front end of the fixed body is connected with the movable cover, the hydraulic cylinder is connected with the fixed body and the movable cover, the rake tooth system is fixed in the movable cover, and the rake teeth of the rake tooth system are narrow teeth. Wherein, the fixed body includes: the high-pressure flushing device comprises a high-neck flange, an oil cylinder support, a high-pressure flushing pipeline, a sealing device, a high-pressure water tank, an anti-collision device, a wear-resisting block and a crescent baffle. Compared with the prior art, the utility model improves the rake teeth of the rake head, improves the connecting part of the rake head and increases the strength of the movable cover so as to prolong the service life of the whole rake head and achieve the aims of saving cost and time and improving construction efficiency.
Description
Technical Field
The utility model relates to dredging equipment, in particular to a drag head for excavating clay.
Background
The drag head is one of the main dredging devices of the drag suction dredger and is arranged at the lower end of the drag suction pipe, when the dredging operation is carried out, the drag head is close to the mud surface under the water, the soil is loosened and the mud is dredged under the dragging of the dredger, then the mud and the water are sucked together by the mud pump and are arranged to the mud cabin, or the side throwing is realized, thereby achieving the aim of dredging. The quality of the dredging performance of the drag head directly influences the production efficiency. Aiming at the soil such as hard clay and the like, the efficiency of the prior drag head has a great space for improving, and the service life of the drag head is greatly lost due to the characteristics of the hard clay.
In order to solve the above problems, we have made a series of improvements.
SUMMERY OF THE UTILITY MODEL
The object of the present invention is to provide a drag head for excavating clay, which overcomes the above-mentioned drawbacks and disadvantages of the prior art.
Drag head for excavating clay comprising: the front end of the fixed body is connected with the movable cover, the hydraulic cylinder is connected with the fixed body and the movable cover, the rake tooth system is fixed in the movable cover, and rake teeth of the rake tooth system are narrow teeth;
wherein the fixing body includes: the high-pressure flushing device comprises a high-neck flange, an oil cylinder support, a high-pressure flushing pipeline, a sealing device, a high-pressure water tank, an anti-collision device, a wear-resistant block and a crescent baffle, wherein the high-neck flange is connected with the tail end of a fixing body, the oil cylinder support is arranged at the top of the fixing body, the high-pressure flushing pipeline is connected with the high-pressure water tank, the wear-resistant block is arranged at the bottom of the high-pressure water tank, a nozzle is arranged on the wear-resistant block, the anti-collision device is arranged at the side edge of the fixing body, the sealing device is arranged at the front end of the fixing body, and the crescent baffle is arranged at the root of the fixing body.
Further, the movable hood includes: the mud pump comprises a water diversion window, a grating and an anti-abrasion baffle, wherein the water diversion window is arranged on the upper portion of a movable cover, the grating is arranged in the movable cover, the width of a channel of the grating is smaller than the passing sphere diameter of a mud pump impeller, and the anti-abrasion baffle is arranged on the left side and the right side of the movable cover.
Further, the rake system is a single row rake system, the rake system comprising: the water flushing device comprises a rake tooth flushing pipe, a tooth holder, rake teeth and a rake tooth water tank, wherein the rake tooth flushing pipe is connected with the rake teeth, the rake teeth are symmetrically arranged on the left and right of the center line of a rake head, the rake tooth water tank is welded in a movable cover, the tooth holder is transversely arranged on the rake tooth water tank, the rake teeth are arranged on the tooth holder, and a high-pressure flushing nozzle is arranged on the rake teeth.
Further, the sealing device includes: the sealing rubber strip is fixed between the seat plate and the pressing plate.
The utility model has the beneficial effects that:
compared with the prior art, the utility model improves the rake teeth of the rake head, improves the connecting part of the rake head and increases the strength of the movable cover so as to prolong the service life of the whole rake head and achieve the aims of saving cost and time and improving construction efficiency.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the movable cover of the present invention.
Fig. 3 is a schematic structural diagram of the rake system of the present invention.
Reference numerals:
the hydraulic control system comprises a fixed body 100, a high neck flange 110, a cylinder support 120, a high-pressure flushing pipeline 130, a sealing device 140, a sealing rubber strip 141, a seat plate 142 and a pressure plate 143.
The high-pressure water tank 150, the anti-collision device 160, the wear-resistant block 170 and the crescent baffle 180.
A removable cover 200, a drainage window 210, a grille 220 and an anti-wear baffle 230.
A tine system 300, a tine flush tube 310, a tine block 320, a tine 330, a tine tank 340, and a hydraulic cylinder 400.
Detailed Description
The present invention will be further described with reference to the following examples. It should be understood that the following examples are illustrative only and are not intended to limit the scope of the present invention.
FIG. 1 is a schematic structural diagram of the present invention. Fig. 2 is a schematic structural view of the movable cover of the present invention. Fig. 3 is a schematic structural diagram of the rake system of the present invention.
Example 1
As shown in fig. 1 to 3, a drag head for excavating clay includes: the front end of the fixed body 100 is connected with the movable cover 200, the hydraulic cylinder 400 is connected with the fixed body 100 and the movable cover 200, the rake teeth system 300 is fixed in the movable cover 200, and the rake teeth of the rake teeth system 300 are narrow teeth;
wherein, the fixing body 100 includes: the high neck flange 110, the hydro-cylinder support 120, high pressure flushing pipe 130, sealing device 140, high pressure water tank 150, buffer stop 160, wear-resisting piece 170 and crescent baffle 180, high neck flange 110 and the end-to-end connection of fixed body 100, the top of fixed body 100 is located to hydro-cylinder support 120, high pressure flushing pipe 130 is connected with high pressure water tank 150, high pressure water tank 150 bottom is equipped with wear-resisting piece 170, be equipped with the nozzle on the wear-resisting piece 170, buffer stop 160 locates the side of fixed body 100, sealing device 140 locates the front end of fixed body 100, crescent baffle 180 locates the root of fixed body 100.
The movable cover 200 includes: the mud pump comprises a water diversion window 210, a grating 220 and anti-abrasion baffles 230, wherein the water diversion window 210 is arranged at the upper part of the movable cover 200, the grating 220 is arranged in the movable cover 200, the width of a channel of the grating 220 is smaller than the passing spherical diameter of a mud pump impeller, and the anti-abrasion baffles 230 are arranged at the left side and the right side of the movable cover 200.
The rake system 300 is a single row rake system, the rake system 300 comprising: the water-saving device comprises a rake tooth flushing pipe 310, a rake tooth holder 320, a rake tooth 330 and a rake tooth water tank 340, wherein the rake tooth flushing pipe 310 is connected with the rake tooth 330, the rake tooth 330 is arranged in bilateral symmetry with the center line of the rake head, the rake tooth water tank 340 is welded in the movable cover 200, the rake tooth holder 320 is transversely arranged on the rake tooth water tank 340, the rake tooth 330 is arranged on the rake tooth holder 320, and a high-pressure flushing nozzle is arranged on the rake tooth 330.
The sealing device 140 includes: the sealing rubber strip 141, the seat plate 142 and the pressure plate 143, and the sealing rubber strip 141 is fixed between the seat plate 142 and the pressure plate 143.
In the traditional technology, when clay is hard, the harrow teeth are difficult to break earth, an ideal excavating effect is difficult to achieve only by increasing the gravity of a harrow head and a high-pressure flushing system with a low pressure head and large discharge capacity, the earth breaking capacity is poor, and the slurry concentration is low. When clay is sticky, the drag head is easily stuck or blocked by balling, so that choking raking is caused, the mud concentration sucked by a mud pump is too low, and the ship construction efficiency is low.
The sealing means 140 locks the sealing rubber strip 141 by means of bolts and pressure plates 143, preventing additional water from entering between the fixed body 100 and the movable cover 200 during dredging, reducing vacuum loss.
The high-pressure flushing pipeline 130 is connected with the high-pressure flushing pipe of the rake pipe, and the high-pressure flushing pipeline 130 is connected with the bottom water tank of the middle pipeline. The bottom of the high-pressure water tank 150 is provided with a wear-resistant block 170 and a nozzle, and high-pressure water is sprayed out through a special nozzle. The soil is broken, liquefied and suspended under the action of high-pressure water to form slurry. The wear-resistant block 170 is made of composite materials, the bottom of the wear-resistant block can be welded, the surface of the wear-resistant block is wear-resistant, excessive wear when the fixing body is in contact with the seabed is prevented, and meanwhile replacement is convenient. The wear-resistant blocks 170 are internally provided with 25 nozzles. The collision avoidance device 160 prevents the drag head from colliding with the hull to be damaged. The crescent baffles 180 prevent seawater from entering the drag head from both sides thereof. The principle is that after the high-pressure water jet cuts soil, the soil is diluted and liquefied, and then the rake teeth cut into the soil, so that the soil breaking force of the rake teeth is reduced, the soil breaking capacity of the rake teeth is improved, the cutting efficiency of the rake teeth is improved, and the requirement on the quality of the rake head is reduced.
The movable cover 200 is a steel welding structure, the movable cover is formed into Jiong shapes by a steel plate electric welding structure, the rear part of the movable cover is provided with a shaft hole, and the movable cover is hinged with the fixed body by a short shaft and can swing 50 degrees to the maximum. The frame-shaped framework is adopted as a cross beam inside, so that the structure of the movable cover is strengthened, and the movable cover can also be used as a mounting seat of the rake tooth water tank 340. The movable cover bears the work of digging, hydraulic scouring, slurry mixing and conveying of the drag head, the change of the flow state and the pressure inside the movable cover is complex, and soil particles are very serious to the abrasion of the structure, so that the movable cover is the key for designing and manufacturing the drag head.
The rake teeth system 300 is a single-row rake teeth system, the rake teeth water tank 340 is welded in the movable cover 200, the strength of the movable cover 200 is enhanced, the single-row rake teeth are arranged on the rake head, and the rake teeth 330 are symmetrically arranged on the left and right of the center line of the rake head, so that the rake teeth are conveniently arranged and the uniform stress is ensured. The rake teeth water tank 340 is welded in the movable cover and plays a role in strengthening the strength of the movable cover, and the rake teeth water tank 340, the nozzles and the corresponding pipeline equipment form a movable cover water tank system for high-pressure water outlet. 18 tooth holders 320 are transversely welded on the rake tooth water tank 340, and 18 rake teeth 330 for mounting a high-pressure flushing nozzle are sleeved on the tooth holders 320 and fixed by bolts. The installation mode facilitates the replacement of the rake teeth so as to achieve the purpose of quick maintenance, and the corresponding rake teeth can be quickly replaced according to different soil qualities. The high-pressure flushing of the rake teeth is transited to the rake teeth from the tooth holder through the spray pipe, so that the high-pressure flushing loss is reduced. The spray pipe is screwed on the tooth holder through threads. In addition, the high-pressure flushing water conveyed to the movable cover can be switched on and off through a manual butterfly valve, so that the device is suitable for different working condition requirements.
Four water diversion windows 210 are arranged on the upper part of the rake head movable cover, and the water inlet of the water diversion windows is adjusted according to different construction working conditions. When excavating soil such as silt, in order to prevent the drag head from being blocked, the water diversion window can be opened, so that the dredging operation can be normally carried out. The method for adjusting the diversion window comprises the following steps: and loosening the two tail bolts of the water diversion window, adjusting the opening of the water diversion window, and screwing the bolts again.
The left and right sides of the lower part of the movable cover 200 are provided with abrasion-proof baffles 230 of HARDOX500 type. The anti-abrasion baffle 230 is pressed on the soil during dredging, so that the movable cover 200 is prevented from being excessively abraded, and the suspended silt disturbed by high-pressure flushing is prevented from escaping towards two sides.
The grating 220 is installed in the movable hood 200 to prevent large clods of soil or rocks from entering the pipe and the impeller to cause clogging, and the grating 220 is easily replaced. The width of the grating channel is slightly smaller than the passing sphere diameter of the impeller of the dredge pump.
The hydraulic cylinder 400 is arranged on the drag head, oil is supplied to the drag head hydraulic cylinder from the ship hydraulic station, the angle between the drag head movable cover and the mud surface is adjusted, the movable cover is tightly attached to the mud surface so as to avoid sucking excessive clear water to reduce the mud concentration, and simultaneously, the drag teeth break the ground at a reasonable cutting angle and cutting resistance, thereby achieving the purposes of improving the mud concentration and improving the dredging efficiency.
While the present invention has been described with reference to the specific embodiments, the present invention is not limited thereto, and various changes may be made without departing from the spirit of the present invention.
Claims (4)
1. Drag head for excavating clay, characterized by comprising: the front end of the fixed body (100) is connected with the movable cover (200), the hydraulic cylinder (400) is connected with the fixed body (100) and the movable cover (200), the rake teeth system (300) is fixed in the movable cover (200), and the rake teeth of the rake teeth system (300) are narrow teeth;
wherein the fixing body (100) comprises: the high-pressure flushing water tank comprises a high-neck flange (110), an oil cylinder support (120), a high-pressure flushing pipeline (130), a sealing device (140), a high-pressure water tank (150), an anti-collision device (160), a wear-resistant block (170) and a crescent baffle (180), wherein the high-neck flange (110) is connected with the tail end of a fixed body (100), the oil cylinder support (120) is arranged at the top of the fixed body (100), the high-pressure flushing pipeline (130) is connected with the high-pressure water tank (150), the bottom of the high-pressure water tank (150) is provided with the wear-resistant block (170), a nozzle is arranged on the wear-resistant block (170), the anti-collision device (160) is arranged at the side edge of the fixed body (100), the sealing device (140) is arranged at the front end of the fixed body (100), and the crescent baffle (180) is arranged at the root of the fixed body (100).
2. The clay excavating drag head according to claim 1, wherein: the movable hood (200) comprises: the mud pump impeller comprises a water diversion window (210), a grating (220) and an anti-abrasion baffle plate (230), wherein the water diversion window (210) is arranged on the upper portion of a movable cover (200), the grating (220) is arranged in the movable cover (200), the width of a channel of the grating (220) is smaller than the passing spherical diameter of the mud pump impeller, and the anti-abrasion baffle plate (230) is arranged on the left side and the right side of the movable cover (200).
3. The clay excavating drag head according to claim 1, wherein: the rake system (300) is a single row rake system, the rake system (300) comprising: the water-saving toilet bowl comprises a rake tooth flushing pipe (310), a tooth holder (320), rake teeth (330) and a rake tooth water tank (340), wherein the rake tooth flushing pipe (310) is connected with the rake teeth (330), the rake teeth (330) are arranged in a manner of bilateral symmetry of a central line of a rake head, the rake tooth water tank (340) is welded in a movable cover (200), the tooth holder (320) is transversely arranged on the rake tooth water tank (340), the rake teeth (330) are arranged on the tooth holder (320), and a high-pressure flushing nozzle is arranged on the rake teeth (330).
4. Drag head for excavating clay according to claim 1, characterized in that said sealing means (140) comprise: the sealing rubber strip (141), the seat board (142) and the pressure plate (143), wherein the sealing rubber strip (141) is fixed between the seat board (142) and the pressure plate (143).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120537383.1U CN215630258U (en) | 2021-03-15 | 2021-03-15 | Drag head for digging clay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120537383.1U CN215630258U (en) | 2021-03-15 | 2021-03-15 | Drag head for digging clay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215630258U true CN215630258U (en) | 2022-01-25 |
Family
ID=79913374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120537383.1U Active CN215630258U (en) | 2021-03-15 | 2021-03-15 | Drag head for digging clay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215630258U (en) |
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2021
- 2021-03-15 CN CN202120537383.1U patent/CN215630258U/en active Active
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