Composite protection device for offshore wind power single pile foundation

Abstract

The invention discloses a composite protection device for an offshore wind power single pile foundation, and relates to the technical field of offshore wind power single pile foundations. The protection device comprises four protection seats and a protection assembly, and the protection assembly is arranged above the protection seats. According to the single pile, the protection bases, the assembling assembly and the reinforcing assembly are arranged, the four protection bases are assembled through the assembling assembly, so that the four protection bases are fixed to the bottom end of the single pile body, meanwhile, the four protection bases are reinforced through the reinforcing assembly, the stability of the four protection bases after being connected with a seabed is improved, and the bottom of the single pile body is protected; the bottom of the single pile body is prevented from being scoured, so that the stability of the single pile body is improved; through the arranged protection assembly, under the action of four arc-shaped blocks and four rolling wheels in the protection assembly, when the four arc-shaped blocks are fixed to the outer portion of the single pile body and located above the sea level, the single pile body can be prevented from being impacted by foreign matter, and therefore the service life of the single pile body is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power monopile foundations, and in particular to a composite protection device for offshore wind power monopile foundations. Background Art

[0002] Monopile foundations are the most widely used type of fixed foundation for offshore wind turbines. They are relatively simple in structure, primarily consisting of welded steel pipes rolled from steel plates. They are categorized into two types: transition-section monopiles and non-transition-section monopiles. While they are widely favored for their simplicity, rapid construction speed, and relatively low cost, they do have some drawbacks, such as low structural rigidity, low natural frequency, susceptibility to seabed scour, and relatively high requirements for construction equipment. After the monopile foundation is installed on the seabed, a protective structure is usually required to protect the bottom of the monopile foundation. However, the monopile foundation in the existing technology still has some defects: 1. In existing technologies, the protective structure at the bottom of a monopile foundation is usually cast in concrete around the bottom of the monopile foundation. Due to its simple structure and inconvenience in filtering sand and gravel on the seabed, the protective effect of the monopile foundation is poor. 2. At the same time, the monopile foundation in the prior art is usually unable to protect the upper part of the monopile foundation, which is easily hit by foreign objects, thereby affecting the service life of the monopile foundation; In response to the above problems, the inventors proposed a composite protection device for an offshore wind power single pile foundation to solve the above problems. Summary of the Invention

[0003] In order to solve the above problems, the purpose of the present invention is to provide a composite protection device for offshore wind power monopile foundation.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: a composite protection device for an offshore wind power single pile foundation, comprising a protection seat and a protection component, wherein the protection component is arranged above the protection seat, and four protection seats are provided. The protection seat is composed of a base, a reinforcement layer and a filter layer, the reinforcement layer is cast on the base, and the filter layer is cast on the reinforcement layer. Notches are provided on the opposite sides of the four protection seats, an assembly component is provided on the protection seat, and a reinforcement component is also provided on the protection seat.

[0005] Preferably, a plurality of ground-inserting rods are fixedly provided on the lower surface of the protection seat, and a plurality of reinforcing ribs are fixedly provided on the ground-inserting rods.

[0006] Preferably, the assembly component includes a sleeve, and a plurality of the sleeves are provided, wherein two adjacent sleeves are provided on a protective seat, an assembly seat is slidingly provided in the sleeve, assembly grooves are provided on both sides of the protective seat, one end of the assembly seat is movably plugged into the inner wall of the assembly groove, a concave hole is provided on one side of the protective seat, an extension screw is rotatably installed in the inner thread of the concave hole, a threaded hole is provided on the assembly seat, and one end of the extension screw is threadedly rotatably connected to the inner wall of the threaded hole.

[0007] Preferably, grooves are provided on both sides of the protection seat, embedded concrete is poured into the grooves, and the sleeve is fixed in the grooves by the embedded concrete.

[0008] Preferably, a hexagonal seat is fixedly provided on one end of the extended screw away from the threaded hole, and the hexagonal seat is located in the concave hole.

[0009] Preferably, a plurality of guide grooves are provided inside the sleeve, a guide block is slidably provided on the inner wall of the guide groove, a movable seat is fixedly provided on the guide block, and the other end of the assembly seat is fixedly connected to one side of the movable seat.

[0010] Preferably, the reinforcement component includes a casting hole, which is vertically arranged on the protective seat. The casting hole passes through the protective seat. A No. 1 annular cavity is provided on the protective seat, and the casting hole is connected to the No. 1 annular cavity. The protective seat is also provided with several No. 2 annular cavities, and the No. 1 annular cavity is connected to the No. 2 annular cavity.

[0011] Preferably, the protective component includes an arc block, four of which are detachably connected, a fixing rod fixedly provided on the outer wall of the arc block, a U-shaped seat fixedly provided on one end of the fixing rod, a roller rotatably installed in the U-shaped seat, and an arc-shaped float fixedly provided on the lower end face of the arc block.

[0012] Preferably, a rubber gasket is fixedly provided on the inner wall of the arc-shaped block, and a reflective sticker is fixedly provided on the outer wall of the arc-shaped block.

[0013] Preferably, a No. 1 movable cavity is provided on one side of the arc block, and a spring rod is fixedly provided on the inner wall of the No. 1 movable cavity, and a No. 1 conical seat is fixedly provided on the telescopic end of the spring rod, and a No. 2 movable cavity is provided on the other side of the arc block, and the No. 1 conical seat is in movably contact with the inner wall of the No. 2 movable cavity, and a movable groove is provided on the upper end surface of the arc block, and a pull rod is movably inserted in the movable groove, and a telescopic spring is movably sleeved on the outer wall of the pull rod, and the telescopic spring is located in the No. 2 movable cavity, and a No. 2 conical seat is fixedly provided on one end of the pull rod, and one end of the telescopic spring is fixedly connected to the top wall of the No. 2 movable cavity, and the other end of the telescopic spring is fixedly connected to the upper surface of the No. 2 conical seat, and the No. 2 conical seat is in movably contact with the inner wall of the No. 2 movable cavity, and a pull ring is fixedly provided on the other end of the pull rod, and the pull ring is located in the movable groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the protective seat, assembly component and reinforcement component are provided. The assembly component assembles the four protective seats so that the four protective seats are fixed to the bottom end of the monopile body. At the same time, the reinforcement component reinforces the four protective seats, thereby improving the stability of the four protective seats after being connected to the seabed, protecting the bottom of the monopile body, and preventing the bottom of the monopile body from being scoured, thereby improving the stability of the monopile body. 2. In the present invention, the protective assembly is provided, and the four arc-shaped blocks and four rollers in the protective assembly function. When the four arc-shaped blocks are fixed to the outside of the monopile body and are located above sea level, the monopile body can be protected from being hit by foreign objects, thereby increasing the service life of the monopile body. 3. In the present invention, the protective seat composed of the base, the reinforcement layer and the filter layer is used. The reinforcement layer improves the overall strength of the base, and the filter layer prevents sand and gravel on the seabed from entering the interior of the base with the seepage, thereby reducing the probability of the base being eroded, thereby increasing the service life of the protective seat and further improving the protective effect of the single pile body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a structural schematic diagram of a composite protection device for an offshore wind power single pile foundation according to the present invention.

[0017] Figure 2 It is a schematic diagram of the composition structure of the protection seat of the present invention.

[0018] Figure 3 This is a schematic diagram of the disassembly structure of the protective seat of the present invention.

[0019] Figure 4 It is a structural schematic diagram of the assembly component and the protective seat of the present invention.

[0020] Figure 5 It is a schematic diagram of the cross-section structure of the sleeve of the present invention.

[0021] Figure 6 It is a structural schematic diagram of the protection component of the present invention.

[0022] Figure 7 This is a schematic diagram of the disassembly structure of the arc block of the present invention.

[0023] Figure 8 It is a schematic diagram of the cross-section structure of the arc block of the present invention.

[0024] Figure 9 This is a schematic diagram of the connection structure between the protection seat and protection assembly and the single pile body according to an embodiment of the present invention.

[0025] In the figure: 1. Protective seat; 11. Base; 12. Reinforcement layer; 13. Filter layer; 2. Notch; 21. Ground rod; 22. Reinforcement rib; 3. Assembly component; 5. Reinforcement component; 6. Protective component; 31. Sleeve; 32. Groove; 33. Embedded concrete; 34. Assembly seat; 35. Assembly slot; 36. Concave hole; 37. Extended screw; 38. Threaded hole; 39. Hexagonal seat; 4. Guide slot; 41. Guide block; 42. Moving seat 51. Casting hole; 52. Annular cavity No. 1; 53. Annular cavity No. 2; 61. Arc block; 62. Rubber gasket; 63. Reflective tape; 64. Fixed rod; 65. U-shaped seat; 66. Roller; 67. Movable cavity No. 1; 68. Spring rod; 69. Conical seat No. 1; 7. Movable cavity No. 2; 71. Movable groove; 72. Pull rod; 73. Telescopic spring; 74. Conical seat No. 2; 75. Pull ring; 76. Arc-shaped float; 10. Single pile body. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example: Figure 1-9As shown, the present invention provides a composite protection device for an offshore wind power monopile foundation, comprising a protection seat 1 and a protection component 6. The protection component 6 is arranged above the protection seat 1, and the protection component 6 is arranged on the monopile body 10 and is located above the sea level to protect the monopile body 10 to prevent the monopile body 10 from being hit by foreign objects. Four protection seats 1 are provided, and the protection seat 1 consists of a base 11, a reinforcement layer 12 and a filter layer 13. The reinforcement layer 12 is cast on the base 11, and the filter layer 13 is cast on the reinforcement layer 12. The base 11 is made of concrete, and the filter layer 13 is made of three layers of non-cohesive soil materials. The non-cohesive soil materials include any one of sand, gravel, pebbles and crushed stone. The filter layer 13 can intercept fine particles to prevent sand and gravel on the seabed from entering the interior of the base 11. The reinforcement layer 12 is made of high-strength steel plate and anti-corrosion coating to improve the base. 11, and can protect the overall strength of the base 11 at the same time. The opposite sides of the four protection seats 1 are provided with slots 2. By providing the slots 2, the four protection seats 1 can be enclosed on the outside of the bottom of the single pile body 10 to protect the bottom of the single pile body 10. The lower surface of the protection seat 1 is fixedly provided with a plurality of ground-inserting rods 21, and the ground-inserting rods 21 are fixedly provided with a plurality of reinforcing ribs 22. By providing the ground-inserting rods 21 and the reinforcing ribs 22, when the ground-inserting rods 21 and the reinforcing ribs 22 are inserted into the seabed, the stability of the protection seat 1 can be improved. An assembly component 3 is provided on the protection seat 1, and a reinforcement component 5 is also provided on the protection seat 1. By providing the assembly component 3 and the reinforcement component 5, the assembly component 3 can facilitate the assembly between the four protection seats 1, and the reinforcement component 5 can reinforce the four assembled protection seats 1 to improve the stability between the protection seat 1 and the seabed.

[0028] The assembly component 3 includes a sleeve 31, and a plurality of sleeves 31 are provided, wherein two adjacent sleeves 31 are provided on a protective seat 1, and grooves 32 are provided on both sides of the protective seat 1, and pre-buried concrete 33 is poured in the groove 32. The sleeve 31 is fixed in the groove 32 by the pre-buried concrete 33, and the sleeve 31 can be stably fixed on the protective seat 1 by the pre-buried concrete 33, so that the sleeve 31 and the protective seat 1 form a whole, and an assembly seat 34 is slidingly provided in the sleeve 31, and assembly grooves 35 are provided on both sides of the protective seat 1, and one end of the assembly seat 34 is movably plugged into the inner wall of the assembly groove 35, and the assembly seat 34 is horizontally slid into the assembly groove 35, that is, Two adjacent protective seats 1 can be assembled together. A recessed hole 36 is provided on one side of the protective seat 1. An extension screw 37 is installed on the inner thread of the recessed hole 36. A threaded hole 38 is provided on the assembly seat 34. One end of the extension screw 37 is threadedly connected to the inner wall of the threaded hole 38. A hexagonal seat 39 is fixedly provided on the end of the extension screw 37 away from the threaded hole 38. The hexagonal seat 39 is located in the recessed hole 36. The extension screw 37 can be rotated by rotating the hexagonal seat 39 with a wrench. When the extension screw 37 is threaded into the interior of the threaded hole 38, the assembly seat 34 on one protective seat 1 can be fixed to the other protective seat 1, thereby fixing the two protective seats 1 together.

[0029] Several guide grooves 4 are provided inside the sleeve 31, and a guide block 41 is slidably provided on the inner wall of the guide groove 4. A movable seat 42 is fixedly provided on the guide block 41. The other end of the assembly seat 34 is fixedly connected to one side of the movable seat 42. By providing the guide groove 4, the guide block 41 and the movable seat 42, the guide block 41 can slide horizontally along the inner wall of the guide groove 4, so that the assembly seat 34 can slide stably horizontally in the sleeve 31 through the movable seat 42.

[0030] The reinforcement component 5 includes a pouring hole 51, which is vertically arranged on the protection seat 1. The pouring hole 51 passes through the protection seat 1. A No. 1 annular cavity 52 is provided on the protection seat 1, and the pouring hole 51 is connected to the No. 1 annular cavity 52. ​​The protection seat 1 is also provided with several No. 2 annular cavities 53, and the No. 1 annular cavity 52 is connected to the No. 2 annular cavity 53. By setting the pouring hole 51, the No. 1 annular cavity 52 and the No. 2 annular cavity 53, when the protection seat 1 is fixed on the upper surface of the seabed, concrete is poured through the pouring hole 51. When the concrete is poured into the seabed, the concrete is distributed in the No. 1 annular cavity 52 and the No. 2 annular cavity 53, thereby improving the stability between the four protection seats 1 and the seabed.

[0031] The protective component 6 includes an arc block 61, four of which are provided. The four arc blocks 61 are detachably connected. By providing four detachable arc blocks 61, the four arc blocks 61 can be covered on the single pile body 10 during installation. The inner wall of the arc block 61 is fixedly provided with a rubber gasket 62, and the outer wall of the arc block 61 is fixedly provided with a reflective sticker 63. By providing the rubber gasket 62 and the reflective sticker 63, the rubber gasket 62 can improve the stability between the arc block 61 and the single pile body 10, and the reflective sticker 63 can provide a reflective effect under the action of light at night, reminding others to know that the single pile body 10 is in good condition. The position of the pile body 10 is to avoid collision. A fixing rod 64 is fixedly provided on the outer wall of the arc block 61. A U-shaped seat 65 is fixedly provided at one end of the fixing rod 64. A roller 66 is rotatably installed in the U-shaped seat 65. By arranging the roller 66 on the outside of the arc block 61, foreign objects can be prevented from colliding with the arc block 61. If a foreign object approaches, the rotation of the roller 66 can guide the foreign object. An arc-shaped float 76 is fixedly provided on the lower end surface of the arc block 61. By arranging the arc-shaped float 76, the arc-shaped float 76 floats on the sea level, thereby ensuring that the arc block 61 and the roller 66 are above the sea level.

[0032] One side of the arc block 61 is provided with a No. 1 movable cavity 67, the inner wall of the No. 1 movable cavity 67 is fixedly provided with a spring rod 68, and the telescopic end of the spring rod 68 is fixedly provided with a No. 1 conical seat 69. The other side of the arc block 61 is provided with a No. 2 movable cavity 7, and the No. 1 conical seat 69 is in movably contact with the inner wall of the No. 2 movable cavity 7. By setting the No. 1 movable cavity 67, the spring rod 68, the No. 1 conical seat 69 and the No. 2 movable cavity 7, the spring rod 68 can push the No. 1 conical seat 69 in the No. 1 movable cavity 67 to be horizontally inserted into the No. 2 movable cavity 7. The upper end surface of the arc block 61 is provided with a movable groove 71, and a pull rod 72 is movably inserted into the movable groove 71. The outer wall of the pull rod 72 is movably sleeved with a telescopic spring 73, and the telescopic spring 73 is located in the No. 2 movable cavity 7. One end of the pull rod 72 is fixedly provided with a No. 2 conical seat 74. One end of the telescopic spring 73 and the No. 2 movable cavity 7 The top wall is fixedly connected, the other end of the telescopic spring 73 is fixedly connected to the upper surface of the No. 2 conical seat 74, and the No. 2 conical seat 74 is in movable contact with the inner wall of the No. 2 movable chamber 7. By setting the pull rod 72, the telescopic spring 73 and the No. 2 conical seat 74, the extended state of the telescopic spring 73 can push the No. 2 conical seat 74 to be vertically inserted into the No. 2 movable chamber 7, and can limit the No. 1 conical seat 69 entering the No. 2 movable chamber 7, so that the No. 1 conical seat 69 is fixed in the No. 2 movable chamber 7, thereby making the two adjacent arc blocks 61 in a fixed state, and the other end of the pull rod 72 is fixedly provided with a pull ring 75, and the pull ring 75 is located in the movable groove 71. By setting the pull ring 75, the pull ring 75 can be pulled by a tool to make the pull rod 72 rise, and the pull rod 72 can make the No. 2 conical seat 74 rise synchronously, and the telescopic spring 73 contracts to release the limiting fixation of the No. 1 conical seat 69.

[0033] Working principle: When the bottom of the monopile body 10 needs to be protected, first, the assembly seat 34 is horizontally connected with the assembly groove 35, and then the extended screw 37 is screwed into the threaded hole 38 to assemble the four protection seats 1 respectively. Then, the four protection seats 1 are hoisted by a crane so that the notches 2 between the four protection seats 1 contact the outer wall of the monopile body 10. The four protection seats 1 are lowered along the monopile body 10 by the crane. When the four protection seats 1 are above the seabed, the multiple ground insertion rods 21 are vertically inserted into the seabed; Subsequently, a grouting pipe of the grouting equipment is inserted into the casting holes 51 of the four protection seats 1, and the bottom end of the grouting pipe is inserted into the seabed. Then, concrete is poured through the grouting equipment, and the concrete enters the seabed. After the pouring is completed, the grouting pipe is moved upward, and the concrete in the grouting pipe enters the No. 1 annular cavity 52 and the No. 2 annular cavity 53 in turn, thereby reinforcing the four protection seats 1 and improving the stability between the four protection seats 1 and the stability between the four protection seats 1 and the seabed. Subsequently, the four arc-shaped blocks 61 are covered on the outside of the single pile body 10 and are located above the sea level. At the same time, the pull ring 75 is pulled up by a tool. The pull ring 75 causes the second conical seat 74 to rise vertically through the pull rod 72, and the telescopic spring 73 contracts. Then, the first conical seat 69 is horizontally inserted into the second movable cavity 7. The pull ring 75 is then released, and the telescopic spring 73 extends, pushing the second conical seat 74 to descend vertically into the second movable cavity 7. The first conical seat 69 is limited so that the first conical seat 69 is fixed in the second movable cavity 7. At this time, the four arc-shaped blocks 61 are fixed on the single pile body 10. At the same time, the four arc-shaped blocks 61 are moved up and down to make the four arc-shaped buoyant bags 76 float on the sea level. The four rollers 66 outside the four arc-shaped blocks 61 protect the single pile body 10 from being hit by foreign objects.

[0034] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A composite protection device for an offshore wind power monopile foundation, comprising a protection seat (1) and a protection component (6), characterized in that: The protective assembly (6) is arranged above the protective seat (1). Four protective seats (1) are provided. The protective seat (1) is composed of a base (11), a reinforcement layer (12) and a filter layer (13). The reinforcement layer (12) is cast on the base (11), and the filter layer (13) is cast on the reinforcement layer (12). Notches (2) are provided on opposite sides of the four protective seats (1). An assembly assembly (3) is provided on the protective seat (1), and a reinforcement assembly (5) is also provided on the protective seat (1).

2. The composite protection device for offshore wind power monopile foundation according to claim 1, characterized in that: A plurality of ground-inserting rods (21) are fixedly provided on the lower surface of the protection seat (1), and a plurality of reinforcing ribs (22) are fixedly provided on the ground-inserting rods (21).

3. The composite protection device for offshore wind power monopile foundation according to claim 1, characterized in that: The assembly component (3) includes a sleeve (31), wherein a plurality of sleeves (31) are provided, wherein two adjacent sleeves (31) are provided on a protective seat (1), an assembly seat (34) is slidably provided in the sleeve (31), both sides of the protective seat (1) are provided with assembly grooves (35), one end of the assembly seat (34) is movably plugged into the inner wall of the assembly groove (35), a concave hole (36) is provided on one side of the protective seat (1), an extension screw (37) is rotatably installed in the inner thread of the concave hole (36), a threaded hole (38) is provided on the assembly seat (34), and one end of the extension screw (37) is threadedly rotatably connected to the inner wall of the threaded hole (38).

4. The composite protection device for offshore wind power monopile foundation according to claim 3, characterized in that: Grooves (32) are provided on both sides of the protection seat (1), embedded concrete (33) is poured into the grooves (32), and the sleeve (31) is fixed in the grooves (32) by the embedded concrete (33).

5. The composite protection device for offshore wind power monopile foundation according to claim 3, characterized in that: A hexagonal seat (39) is fixedly provided at one end of the extended screw (37) away from the threaded hole (38), and the hexagonal seat (39) is located in the concave hole (36).

6. The composite protection device for offshore wind power monopile foundation according to claim 3, characterized in that: A plurality of guide grooves (4) are provided inside the sleeve (31), a guide block (41) is slidably provided on the inner wall of the guide groove (4), a movable seat (42) is fixedly provided on the guide block (41), and the other end of the assembly seat (34) is fixedly connected to one side of the movable seat (42).

7. The composite protection device for offshore wind power monopile foundation according to claim 1, characterized in that: The reinforcement component (5) includes a pouring hole (51), the pouring hole (51) is vertically arranged on the protection seat (1), the pouring hole (51) passes through the protection seat (1), a first annular cavity (52) is provided on the protection seat (1), the pouring hole (51) is connected to the first annular cavity (52), and a plurality of second annular cavities (53) are further provided on the protection seat (1), the first annular cavity (52) is connected to the second annular cavity (53).

8. The composite protection device for offshore wind power monopile foundation according to claim 1, characterized in that: The protection assembly (6) includes an arc block (61), four of which are provided. The four arc blocks (61) are detachably connected to each other. A fixing rod (64) is fixedly provided on the outer wall of the arc block (61), a U-shaped seat (65) is fixedly provided on one end of the fixing rod (64), a roller (66) is rotatably installed in the U-shaped seat (65), and an arc-shaped float (76) is fixedly provided on the lower end surface of the arc block (61).

9. The composite protection device for offshore wind power monopile foundation according to claim 8, characterized in that: A rubber gasket (62) is fixedly provided on the inner wall of the arc-shaped block (61), and a reflective sticker (63) is fixedly provided on the outer wall of the arc-shaped block (61).

10. The composite protection device for offshore wind power monopile foundation according to claim 8, characterized in that: A movable cavity (67) is provided on one side of the arc block (61), a spring rod (68) is fixedly provided on the inner wall of the movable cavity (67), a conical seat (69) is fixedly provided on the telescopic end of the spring rod (68), a movable cavity (7) is provided on the other side of the arc block (61), the conical seat (69) and the inner wall of the movable cavity (7) are in movable contact, a movable groove (71) is provided on the upper end surface of the arc block (61), a pull rod (72) is movably inserted in the movable groove (71), and the outer wall of the pull rod (72) is movably sleeved. A telescopic spring (73) is provided, and the telescopic spring (73) is located in the No. 2 movable chamber (7). One end of the pull rod (72) is fixedly provided with a No. 2 conical seat (74). One end of the telescopic spring (73) is fixedly connected to the top wall of the No. 2 movable chamber (7), and the other end of the telescopic spring (73) is fixedly connected to the upper surface of the No. 2 conical seat (74). The No. 2 conical seat (74) is in movable contact with the inner wall of the No. 2 movable chamber (7). The other end of the pull rod (72) is fixedly provided with a pull ring (75), and the pull ring (75) is located in the movable groove (71).

Images