Self-elevating platform and pile washing nozzle

Abstract

The utility model provides a self-elevating platform and a pile washing nozzle. The pile washing nozzle comprises a nozzle body and at least three spraying pieces arranged at intervals. The top wall of the nozzle body extends horizontally and is used for being connected with the bottom of a pile shoe, and the peripheral wall of the nozzle body inclines inwards from top to bottom. A connecting channel extending in the vertical direction and at least three spraying channels communicating with the connecting channel are arranged in the nozzle body, the connecting channel penetrates through the top wall, and the spraying channels penetrate through the peripheral wall; the spraying pieces are arranged in the spraying channels in a one-to-one correspondence mode, and the spraying pieces are provided with spraying openings used for spraying water outwards. According to the pile washing nozzle, the spraying piece is embedded in the nozzle body, so that the situation that silt enters a pile washing pipeline to cause blockage in the pile pressing process can be avoided, and smooth pile pulling is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to offshore platform technical field, especially a self-elevating platform and pile driving nozzle. BACKGROUND

[0002] The self-elevating platform includes offshore self-elevating gas compression platform, self-elevating drilling platform and other self-elevating offshore engineering platform. The design working condition of the self-elevating platform has two kinds of floating state working condition and pile standing working condition. When the platform is in the pile standing working condition operation, the pile shoe is deeply pressed into the seabed in the pre-pressing pile process, and the maximum depth of the mud penetration reaches more than ten meters, so that the center of gravity of the platform is stable during the operation on the sea.

[0003] After the platform completes the operation, the pile shoe needs to be pulled out from the silt, therefore, the automatic pile driving pump or high-pressure pile driving pump needs to be used for pile driving. The pile driving is that water is sprayed from the nozzle at the bottom of the pile shoe by the pile driving pump after being pressurized, so as to destroy the adsorption force from the seabed silt. The traditional nozzle is easily blocked by the silt, which causes the pile pulling difficult, and even leads to the tilting and collapse of the platform losing the center of gravity. SUMMARY

[0004] The utility model discloses a self-elevating platform and pile driving nozzle, which solve the technical problem that the nozzle is easily blocked in the prior art, and the pile is difficult to pull out.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme: a pile driving nozzle, comprising a nozzle body and at least three jet members arranged at intervals.

[0006] The top wall of the nozzle body extends horizontally and is used to be connected with the bottom of the pile shoe. The outer peripheral wall of the nozzle body is inclined inward from top to bottom. A connecting channel extending in the upward and downward directions is arranged in the nozzle body, and at least three jet channels in communication with the connecting channel are arranged in the nozzle body. The connecting channel penetrates the top wall, and the jet channels penetrate the outer peripheral wall.

[0007] The jet members are arranged one by one in the jet channels. The jet members have jet ports for spraying water outward.

[0008] In one embodiment, the included angle between the two jet channels located at the outermost sides of the at least three jet channels is 90°-120°.

[0009] The included angle between the outer peripheral wall of the nozzle body and the horizontal plane is 40°-50°.

[0010] The material of the nozzle body is high-strength steel, and the nozzle body is integrally formed.

[0011] In one embodiment, the spray member comprises an outer cylinder and a spray body located in the outer cylinder, the spray body is tapered in diameter in the direction close to the outer peripheral wall, the end of the spray body close to the outer peripheral wall forms a spray port, the outer cylinder is provided with a first opening and a second opening at two ends respectively, the diameter of the first opening is consistent with the diameter of the end of the spray body close to the connecting channel, the diameter of the second opening is consistent with the diameter of the spray port, and the diameter of the first opening is consistent with the diameter of the communication part of the spray channel.

[0012] In one embodiment, the spray channel comprises a communication part close to the connecting channel and a spray impact part close to the outer peripheral wall, the diameter of the spray impact part is larger than the diameter of the communication part, the diameter of the communication part is consistent with the diameter of the end of the spray member close to the connecting channel, and the spray member is located in the spray impact part and communicates with the communication part.

[0013] In one embodiment, the outer peripheral wall extends outward beyond the spray port so that the spray member is completely accommodated in the spray impact part.

[0014] The spray member is in abutment with the end of the communication part close to the spray impact part, the diameter of the opening of the end of the spray member close to the communication part is consistent with the diameter of the communication part.

[0015] In one embodiment, the cross section of the nozzle body is a polygon, the polygon comprises an even number of sides, and a plurality of spray channels correspond to a plurality of adjacent sides of the polygon.

[0016] In one embodiment, the cross section of the nozzle body is an octagon, the octagon comprises a first side, a second side, a third side, a fourth side, a fifth side, a sixth side, a seventh side and an eighth side, the first side and the fifth side are parallel and opposite, the second side and the sixth side are parallel and opposite, the third side and the seventh side are parallel and opposite, the fourth side and the eighth side are opposite and parallel, the number of spray channels is three, corresponding to the second side, the third side and the fourth side respectively, and the second side and the fourth side are symmetrically distributed on both sides of the third side.

[0017] In one embodiment, the size of the third side is larger than the size of the seventh side, the size of the first side is consistent with the size of the fifth side, the size of the second side is consistent with the size of the fourth side, the size of the sixth side is consistent with the size of the eighth side, the size of the sixth side is larger than the size of the fourth side, the size of the fourth side is larger than the size of the third side, and the size of the seventh side is larger than the size of the first side.

[0018] The axis of the connecting channel is located on the extension line of the center line of the third side, and the axis of the connecting channel is located on the extension line of the center line of the seventh side.

[0019] In one embodiment, the top of the nozzle body is provided with an annular groove with a top opening, the annular groove being spaced apart on the outer periphery of the connecting channel, and the pile driving nozzle further includes a sealing ring disposed within the annular groove.

[0020] This utility model also provides a self-elevating platform, including a pile shoe and a pile driving nozzle as described above disposed at the bottom of the pile shoe.

[0021] In one embodiment, the bottom of the pile shoe is provided with a plurality of pile-driving nozzles, which are spaced apart and arranged in a ring; each of the pile-driving nozzles is arranged with the spray port facing outward.

[0022] The distance between each of the pile driving nozzles and the center of the pile shoe is not less than two-thirds of the dimension between the center of the pile shoe and the edge of the pile shoe.

[0023] As can be seen from the above technical solution, this utility model has at least the following advantages and positive effects:

[0024] The present invention's pile driving nozzle embeds the spraying component within the nozzle body, thereby preventing mud and sand from entering the pile driving pipeline and causing blockage during the pile driving process, ensuring smooth pile extraction.

[0025] Furthermore, the nozzle body is made of high-strength steel, increasing the strength of the pile driving nozzle and enabling it to withstand high loads and lateral displacements, filling the gap in high-load nozzle products for the bottom of pile shoes. The nozzle body is integrally molded, further increasing the strength of the pile driving nozzle.

[0026] The novel design and ingenious structure of the pile driving nozzle solve the problem of nozzle damage and clogging caused by high loads on the bottom of the pile shoe. This nozzle is not limited by factors such as pile shoe size, platform weight, or the depth of mud penetration in the working area, making it less restrictive in use and widely applicable, thus deserving widespread promotion. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of one embodiment of the nozzle for pile driving according to this utility model.

[0028] Figure 2 yes Figure 1 A front view diagram of the inverted nozzle of the pile driving project.

[0029] Figure 3 yes Figure 2 Cross-sectional view along the BB direction.

[0030] Figure 4 is Figure 2 is a sectional view of the C-C direction in

[0031] Figure 5 is Figure 1 is a top view of the inverted pile-ramming nozzle in

[0032] Figure 6 is a sectional view of one embodiment of the spray member in the utility model.

[0033] Figure 7 is a local structure diagram of the pile-ramming nozzle and the shoe in the utility model.

[0034] Figure 8 is Figure 7 is a sectional view of the D-D direction in

[0035] The following is the explanation of the reference signs:

[0036] 1, pile-ramming nozzle; 11, nozzle body; 111, connecting channel; 112, spray channel; 1121, communicating part; 1122, spray-ramming part; 1131, first side; 1132, second side; 1133, third side; 1134, fourth side; 1135, fifth side; 1136, sixth side; 1137, seventh side; 1138, eighth side; 12, spray member; 121, outer cylinder; 122, spray body; 13, sealing ring;

[0037] 2, shoe; 3, pile-ramming pipeline. DETAILED DESCRIPTION

[0038] Although the utility model can be easily expressed as different forms of embodiments, only some specific embodiments are shown in the drawings and will be described in detail in the specification, and it can be understood that the specification should be regarded as a demonstrative description of the principles of the utility model, and is not intended to limit the utility model to that described herein.

[0039] Therefore, one feature indicated in the specification will be used to explain one feature of one embodiment of the utility model, and it is not implied that each embodiment of the utility model must have the explained feature. In addition, it should be noted that the specification describes many features. Although certain features can be combined together to show possible system designs, these features can also be used in other combinations that are not explicitly described. Therefore, unless otherwise stated, the described combination is not intended to be limited.

[0040] In the embodiments shown in the drawings, the indications of directions, such as up, down, left, right, front and back, are used to explain the structure and movement of various elements of the present application, which are not absolute but relative. When these elements are in the positions shown in the drawings, these indications are appropriate. If the positions of these elements change, the indications of directions will change accordingly.

[0041] In combination Figures 1-4 The present application provides a pile flushing nozzle 1, which is mainly used for flushing piles during pile pulling, so as to destroy the adsorption force of silt, so that the pile shoe 2 can smoothly separate from the seabed. The pile flushing nozzle 1 embeds the spray member 12 in the nozzle body 11, so as to avoid the silt entering the pile flushing pipeline 3 during pile pressing and causing blockage, and ensure the smooth pile pulling.

[0042] Among them, the pile flushing nozzle 1 comprises a nozzle body 11 and at least three spray members 12 arranged at intervals.

[0043] The top wall of the nozzle body 11 extends horizontally, which is used to connect with the bottom of the pile shoe 2, and the outer peripheral wall of the nozzle body 11 is inclined inward from top to bottom. The nozzle body 11 is provided with a connecting channel 111 extending in the vertical direction and at least three spray channels 112 communicating with the connecting channel 111, the connecting channel 111 penetrates the top wall, and the spray channel 112 penetrates the outer peripheral wall.

[0044] The material of the nozzle body 11 is high-strength steel. The nozzle body 11 is integrally formed. Therefore, the nozzle body 11 has high structural strength, so as to withstand high load and transverse displacement.

[0045] Among them, due to the market demand for larger and larger size, higher and higher degree of automation, and larger and larger load of the crane equipped on the platform. Further, the self weight of the platform and the load borne by the pile shoe 2 in the pile standing working condition are larger and larger, which causes the nozzle at the bottom of the pile shoe 2 to be easily crushed during pile pressing. The structural strength of the nozzle body 11 made of high-strength steel is larger, so as to avoid being crushed.

[0046] Specifically, the nozzle body 11 comprises a top wall and a bottom wall arranged in parallel at intervals, and an outer peripheral wall connecting the top wall and the bottom wall.

[0047] The top wall extends horizontally, so as to better fit the pile shoe 2. Further, the outer edge of the top wall is connected with the outer peripheral wall through a transition wall. The transition wall is inclined outward from top to bottom.

[0048] The outer peripheral wall is inclined inward from top to bottom. Among them, the inner and outer are referred to the use state of the nozzle body 11, the direction towards the center of the nozzle body 11 is the inner, and vice versa.

[0049] The above design of the outer peripheral wall not only reduces the weight of the nozzle body 11, but also makes the outer periphery of the nozzle body 11 in a slope design, thereby reducing the friction from the seabed silt during the pile pressing process.

[0050] Preferably, the angle between the outer peripheral wall of the nozzle body 11 and the horizontal plane is 40°-50°. In the embodiment, the angle between the outer peripheral wall of the nozzle body 11 and the horizontal plane is 45°.

[0051] Due to the slope design of the outer peripheral wall, the size of the bottom wall is smaller than that of the top wall.

[0052] The outer peripheral wall can be a plane or an arc surface. When the outer peripheral wall is a plane, a plurality of planes are connected end to end. When the outer peripheral wall is an arc surface, the outer peripheral wall can be a circular arc surface or a plurality of arc surfaces connected end to end. The circular arc surface herein can be a standard circle or an approximate circle with a certain tolerance.

[0053] When the outer peripheral wall is a plane, the cross section of the nozzle body 11 is a polygon. The polygon includes an even number of sides, and the plurality of jet channels 112 correspond to a plurality of adjacent sides of the polygon. Therefore, the plurality of outer peripheral walls corresponding to the plurality of jet channels 112 are adjacent.

[0054] Referring to Figure 5 , specifically, in the embodiment, the cross section of the nozzle body 11 is an octagon. The octagon includes a first side 1131, a second side 1132, a third side 1133, a fourth side 1134, a fifth side 1135, a sixth side 1136, a seventh side 1137, and an eighth side 1138 connected in sequence. The first side 1131 and the fifth side 1135 are parallel and opposite, the second side 1132 and the sixth side 1136 are parallel and opposite, the third side 1133 and the seventh side 1137 are parallel and opposite, and the fourth side 1134 and the eighth side 1138 are parallel and opposite. The number of jet channels 112 is three, corresponding to the second side 1132, the third side 1133, and the fourth side 1134, respectively. The second side 1132 and the fourth side 1134 are symmetrically distributed on opposite sides of the third side 1133. The sixth side 1136 and the eighth side 1138 are symmetrically distributed on opposite sides of the seventh side 1137.

[0055] Further, the size of the third side 1133 is greater than the size of the seventh side 1137. The size of the first side 1131 is consistent with the size of the fifth side 1135. The size of the second side 1132 is consistent with the size of the fourth side 1134. The size of the sixth side 1136 is consistent with the size of the eighth side 1138. The size of the sixth side 1136 is greater than the size of the fourth side 1134. The size of the fourth side 1134 is greater than the size of the third side 1133. The size of the seventh side 1137 is greater than the size of the first side 1131.

[0056] The connecting channel 111 extends downward from the top of the nozzle body 11, so that the connecting channel 111 penetrates the top wall. The connecting channel 111 does not extend to the bottom wall, i.e. there is a gap between the bottom of the connecting channel 111 and the bottom wall. The position of the connecting channel 111 on the top wall can be set according to specific conditions.

[0057] In this embodiment, the axis of the connecting channel 111 is on the extension line of the center line of the third edge 1133, and the axis of the connecting channel 111 is on the extension line of the center line of the seventh edge 1137. It can be understood that, in the vertical projection, the axis of the connecting channel 111 is exactly on the extension line of the center line of the third edge 1133. The axis of the connecting channel 111 is on the extension line of the center line of the seventh edge 1137.

[0058] Among the at least three jet channels 112, the included angle between the two outermost jet channels 112 is 90°-120°. In this embodiment, the number of jet channels 112 is three. The included angle α between any two adjacent jet channels 112 is 45°. The included angle between the two outermost jet channels 112 is 90°. The angle of the jet channel 112 can also be other, which can be set according to actual needs. In other embodiments, the number of jet channels 112 can be four. The included angle α between any two adjacent jet channels 112 is 30°, and at this time, the included angle between the two outermost jet channels 112 is 120°. The number of jet channels can also be other, which can be set according to actual needs and ensure the strength and rigidity of the whole pile jetting nozzle 1 and the water quantity in each jet channel 112.

[0059] The included angle design of the at least three jet channels 112 can maximize the local water injection during the pile driving process, so as to destroy the vacuum adsorption force of the seabed to the pile shoe 2.

[0060] The jet channel 112 extends in the horizontal direction. Specifically, the jet channel 112 includes a communication part 1121 close to the connecting channel 111 and a jetting part 1122 close to the outer peripheral wall. That is, the jet channel 112 is arranged along the communication part 1121 and the jetting part 1122 in its own axial direction. The communication part 1121 is located inside the jetting part 1122.

[0061] The caliber of the jetting part 1122 is larger than that of the communication part 1121, the caliber of the communication part 1121 is consistent with the caliber of the end of the jet member 12 close to the connecting channel 111, and the jet member 12 is located in the jetting part 1122 and communicates with the communication part 1121.

[0062] The jetting part 1122 is embedded in the nozzle body 11, and the jet member 12 is accommodated in the jetting part 1122, which can reduce the impact of seabed silt on the jetting part 1122 during the pile pressing process of the pile shoe 2.

[0063] Further, a transition portion is arranged between the communication portion 1121 and the jetting portion 1122, and the transition portion gradually expands in diameter from inside to outside. The diameter of the end of the transition portion close to the communication portion 1121 is consistent with the diameter of the communication portion 1121, and the diameter of the end of the transition portion close to the jetting portion 1122 is consistent with the diameter of the jetting portion 1122.

[0064] The outer peripheral wall extends outward beyond the jetting port so that the jetting member 12 is completely accommodated in the jetting portion 1122.

[0065] Referring to Figure 6 The jetting member 12 includes an outer cylinder 121 and a jetting body 122 arranged in the outer cylinder 121. The outer cylinder 121 has a space for accommodating the jetting body 122. The jetting body 122 gradually reduces in diameter in the direction close to the outer peripheral wall, and the end of the jetting body 122 close to the outer peripheral wall constitutes the jetting port. The pressurized water is jetted outward through the jetting port, thereby destroying the adsorption force generated from the seabed silt. That is, the jetting member 12 is designed as an outer circle and inner cone structure. The shape of the outer cylinder 121 makes the jetting member 12 convenient to put into the jetting passage 112, and the jetting body 122 arranged in the outer cylinder 121 and in the conical shape can prevent the silt from entering the inside of the jetting passage 112.

[0066] The jetting member 12 is connected to the end of the communication portion 1121 close to the jetting portion 1122, and the diameter of the opening of the end of the jetting member 12 close to the communication portion 1121 is consistent with the diameter of the communication portion 1121.

[0067] The outer cylinder 121 is provided with a first opening and a second opening at two ends thereof, respectively. The diameter of the first opening is consistent with the diameter of the end of the jetting body 122 close to the connecting passage 111, and the diameter of the second opening is consistent with the diameter of the jetting port. The diameter of the first opening is consistent with the diameter of the communication portion 1121 of the jetting passage 112, thereby ensuring that the water entering the connecting passage 111 can completely enter the jetting body 122. The conical shape of the jetting body 122 makes the diameter of the water entering larger than the diameter of the jetting port, thereby further improving the pressure of the water.

[0068] That is, the connecting passage 111 receives the high-pressure water delivered from the jetting pump, and distributes the high-pressure water into at least three jetting passages 112, and then the high-pressure water is jetted outward through the jetting member 12.

[0069] The top of the nozzle body 11 is provided with a top opening annular groove. The annular groove is spaced apart from the outer periphery of the connecting passage 111. The pile driving nozzle 1 further includes a sealing ring 13 arranged in the annular groove. The sealing ring 13 increases the water tightness between the pile driving nozzle 1 and the pile shoe 2.

[0070] In summary, the pile driving nozzle 1 has the following advantages:

[0071] 1. The spraying element 12 is embedded in the nozzle body 11 of the pile driving nozzle 1, which can prevent mud and sand from entering the pile driving pipeline 3 during the pile driving process and causing blockage, thus ensuring the smooth extraction of the pile.

[0072] 2. The nozzle body 11 is made of high-strength steel, which increases the strength of the pile driving nozzle 1 and enables the pile driving nozzle 1 to withstand high loads and lateral displacement, filling the gap in high-load nozzle products at the bottom of the pile shoe 2.

[0073] The nozzle body 11 is integrally formed, which further increases the strength of the pile driving nozzle 1.

[0074] 3. The design of the pile driving nozzle 1 is novel and its structure is ingenious, solving the problem of nozzle damage and clogging caused by high load on the bottom of the pile shoe 2. The pile driving nozzle 1 is not limited by factors such as the size of the pile shoe 2, the weight of the platform, and the depth of mud penetration in the working area. It has few limitations in use, a wide range of applications, and is worthy of vigorous promotion.

[0075] Combination Figure 7 and Figure 8 The present invention also provides a self-elevating platform, including a pile shoe 2 and a pile-driving nozzle 1 disposed at the bottom of the pile shoe 2 as described above.

[0076] Among them, the jack-up platform can be a jack-up gas compression platform, a jack-up drilling platform, or other jack-up marine engineering platforms.

[0077] Multiple pile-driving nozzles 1 are provided at the bottom of the pile shoe 2. The multiple pile-driving nozzles 1 are spaced apart and arranged in a ring.

[0078] Each pile driving nozzle 1 is arranged with the spray nozzle facing outward.

[0079] Specifically, the pile driving nozzle 1 can be arranged according to the size of the pile shoe 2, so as to better avoid excessive local load on the pile driving nozzle 1 and better destroy the vacuum adsorption force at the bottom of the pile shoe 2 during the pile extraction process.

[0080] Furthermore, the distance between the center of each pile nozzle 1 and the center of the pile shoe 2 is not less than two-thirds of the dimension between the center of the pile shoe 2 and the edge of the pile shoe 2.

[0081] The self-elevating platform includes a pile pump and multiple pile pumping pipes 3, which are connected to multiple pile pumping nozzles 1, thereby delivering the water pumped by the pile pump to each pile pumping nozzle 1. Specifically, the pile pumping pipes 3 are inserted into the connecting channel 111.

[0082] The pile body and the pile shoe 2 are connected by full penetration welding to ensure the connection strength between the two and prevent the weld from cracking when the nozzle of the pile shoe 2, which is under high load and anti-clogging, is subjected to large forces and excessive local loads. This ensures the integrity and safety of the entire self-elevating platform.

[0083] While the present application has been described with reference to several exemplary embodiments, it is understood that the words that have been used are words of description and illustration, rather than words of limitation. As mentioned above, changes and modifications can be made to the above-described embodiments without departing from the spirit or scope of the application. Therefore, the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and all changes coming within the meaning and equivalency range of the appended claims are intended to be embraced therein.

Claims

1. A pile driving tip, characterized in that The nozzle body and the at least three nozzles are spaced apart; The top wall of the nozzle body extends horizontally and is connected to the bottom of the spud shoe, and the outer peripheral wall of the nozzle body is inclined inward from top to bottom; the nozzle body is provided with a connecting channel extending in the vertical direction and at least three jet channels communicating with the connecting channel, the connecting channel penetrates through the top wall, and the jet channels penetrate through the outer peripheral wall; The nozzles are arranged one by one in the jet channels, and each nozzle has a jet port for jetting water outward.

2. A punch nozzle according to claim 1, characterized in that The included angle between the two outermost jet channels among the at least three jet channels is 90°-120°; The included angle between the outer peripheral wall of the nozzle body and the horizontal plane is 40°-50°; The nozzle body is made of high-strength steel and is integrally formed.

3. The punch and pierce nozzle of claim 1 wherein, The nozzle body includes an outer cylinder and a jet body located in the outer cylinder, the jet body tapers in diameter in the direction close to the outer peripheral wall, the end of the jet body close to the outer peripheral wall constitutes a jet port, the two ends of the outer cylinder are respectively provided with a first opening and a second opening, the diameter of the first opening is consistent with the diameter of the end of the jet body close to the connecting channel, the diameter of the second opening is consistent with the diameter of the jet port, and the diameter of the first opening is consistent with the diameter of the communication part of the jet channel.

4. The punch and pierce nozzle of claim 1 wherein, The jet channel includes a communication part close to the connecting channel and a jet impact part close to the outer peripheral wall, the diameter of the jet impact part is greater than the diameter of the communication part, the diameter of the communication part is consistent with the diameter of the end of the nozzle close to the connecting channel, and the nozzle is located in the jet impact part and communicates with the communication part.

5. A punch nozzle according to claim 4, characterised in that The outer peripheral wall of the nozzle body extends outward beyond the jet port so that the nozzle is completely accommodated in the jet impact part; The nozzle and the end of the communication part close to the jet impact part are in abutment, and the diameter of the opening of the end of the nozzle close to the communication part is consistent with the diameter of the communication part.

6. The punch and pierce nozzle of claim 1 wherein, The cross section of the nozzle body is polygonal, the polygon includes an even number of sides, and a plurality of jet channels correspond to a plurality of adjacent sides of the polygon.

7. A punch nozzle according to claim 6, characterised in that The cross section of the nozzle body is octagonal, the octagon includes a first side, a second side, a third side, a fourth side, a fifth side, a sixth side, a seventh side and an eighth side, the first side and the fifth side are parallel and opposite, the second side and the sixth side are parallel and opposite, the third side and the seventh side are parallel and opposite, the fourth side and the eighth side are opposite and parallel, the number of jet channels is three, corresponding to the second side, the third side and the fourth side, and the second side and the fourth side are symmetrically distributed on both sides of the third side.

8. A punch nozzle according to claim 7, characterized in that The size of the third side is greater than the size of the seventh side, the size of the first side is consistent with the size of the fifth side, the size of the second side is consistent with the size of the fourth side, the size of the sixth side is consistent with the size of the eighth side, the size of the sixth side is greater than the size of the fourth side, the size of the fourth side is greater than the size of the third side, and the size of the seventh side is greater than the size of the first side. The axis of the connecting channel is on the extension line of the center line of the third edge, and the axis of the connecting channel is on the extension line of the center line of the seventh edge.

9. The punch and pierce nozzle of claim 1 wherein, The top of the nozzle body is provided with a top open annular groove, which is spaced from the outer periphery of the connecting channel, and the pile-jetting nozzle further comprises a sealing ring arranged in the annular groove.

10. A jack-up platform, characterised in that The pile shoe is provided with a pile shoe bottom, and the pile-jetting nozzle according to any one of claims 1-9 is arranged on the pile shoe bottom.

11. A jack-up platform according to claim 10, characterised in that, The pile shoe bottom is provided with a plurality of pile-jetting nozzles, which are arranged in a ring shape in a spaced manner, and each of the pile-jetting nozzles is arranged with the jetting port facing outward. The distance between each of the pile-jetting nozzles and the center of the pile shoe is not less than two-thirds of the size between the center of the pile shoe and the edge of the pile shoe.

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