Anti-corrosion and anti-rust bolt for offshore generator set and manufacturing method

Abstract

The invention relates to the technical field of bolts, and discloses an anti-corrosion and anti-rust bolt for an offshore generator set and a manufacturing method.The anti-corrosion and anti-rust bolt comprises a bolt head, a pressing disc and a first threaded rod, a connecting column is arranged at the bottom of the bolt head, a second threaded rod is arranged at the bottom of the connecting column, and a bearing is arranged on the outer side wall of the second threaded rod; a hexagonal block is arranged on the outer side wall of the bearing, and a hexagonal groove is formed in the top of the screw head. Through mutual cooperation of the sealing ring and the rubber sleeve, a gap between a seawater platform and a seawater generator set and a gap between the screw head and the seawater generator set can be sealed, meanwhile, the rubber sleeve can wrap and protect the screw head, and then it is guaranteed that the whole bolt is in a sealed state after the seawater generator set is fixed; and the outer surface of the whole bolt is subjected to chromium plating treatment, so that the bolt has the anti-corrosion and anti-rust functions, and meanwhile, the surface hardness and the wear resistance are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of bolts, and in particular relates to an anti-corrosion and anti-rust bolt for an offshore generator set and a manufacturing method thereof. Background Art

[0002] The offshore generator set is located in an environment with high moisture and salt content in the air. When the offshore generator set is fixed by bolts, an anti-corrosion and anti-rust coating is often applied on the surface of the bolts to prevent the bolts from rusting and corroding. However, when the bolts are screwed, the anti-corrosion and anti-rust coating on the thread surface will fall off due to wear. At this time, the moisture and salt in the air will enter the threaded hole of the bolt through the connection gap between the bolt and the offshore generator set, thereby corroding the thread of the bolt, thereby reducing the fixing effect of the bolt on the offshore generator set. For this reason, we propose an anti-corrosion and anti-rust bolt for offshore generator sets and a manufacturing method. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an anti-corrosion and anti-rust bolt for an offshore generator set and a manufacturing method, which effectively solves the problem that when the bolt is screwed and fixed, the anti-corrosion and anti-rust coating on the thread surface will fall off due to wear. At this time, the moisture and salt in the air will enter the threaded hole of the bolt through the connection gap between the bolt and the offshore generator set, thereby corroding the thread of the bolt, thereby reducing the fixing effect of the bolt on the offshore generator set.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an anti-corrosion and anti-rust bolt for an offshore generator set, comprising a screw head, a pressure plate and a first screw rod, a connecting column is provided at the bottom of the screw head, a second screw rod is provided at the bottom of the connecting column, a bearing is provided on the outer wall of the second screw rod, a hexagonal block is provided on the outer wall of the bearing, a hexagonal groove is provided at the top of the screw head, a threaded hole is provided at the top of the first screw rod, a hexagonal groove is provided through the top of the pressure plate, the second screw rod passes through the hexagonal groove of the pressure plate and is threadedly connected to the threaded hole of the first screw rod, the hexagonal block is inserted in the hexagonal groove of the pressure plate, and a sealing assembly is placed on the outer wall of the screw head.

[0005] Preferably, the sealing assembly includes a rubber sleeve and a sealing ring, the rubber sleeve is wrapped around the outer wall of the screw head, the sealing ring is arranged on the outer wall of the pressure plate, and the thickness of the sealing ring is 1.1 times that of the pressure plate.

[0006] Preferably, the rubber sleeve, the connecting column and the second screw are integrally formed, and the first screw and the pressure plate are integrally formed.

[0007] Preferably, the total length of the diameters of the rubber sleeve and the screw head is the same as the total length of the diameters of the pressure plate and the sealing ring.

[0008] Preferably, the outer side walls of the screw head, the connecting column, the second screw rod, the pressure plate, the first screw rod and the hexagonal block are all plated with a chrome layer, and the top and bottom of the pressure plate are provided with anti-slip grooves.

[0009] Preferably, the screw head, the connecting column, the second screw rod, the pressure plate, the first screw rod and the hexagonal block are made of the same material, which is a nickel-based alloy.

[0010] A method for manufacturing anti-corrosion and anti-rust bolts for offshore generator sets, comprising the following steps:

[0011] Step 1: Select a nickel-based alloy cylindrical material and use a cutting machine to perform three-stage cutting. The upper end of the nickel-based alloy cylinder is cut into a screw head, the middle end is cut into a connecting column, and the lower end is cut into a second screw. The second screw surface is processed into threads by a turning machine, and a hexagonal groove is opened on the top of the screw head by a drilling machine with a hexagonal drill bit.

[0012] Step 2: Select a nickel-based alloy cylindrical material and use a cutting machine to perform two-stage cutting. Cut the upper end of the nickel-based alloy cylinder into a pressure plate, and cut the lower end into a first screw. Use a turning machine to process threads on the surface of the first screw. Use a drilling machine with a hexagonal drill bit to penetrate the top of the pressure plate to open a hexagonal groove. Use a knurling machine to open anti-slip grooves on the upper and lower surfaces of the pressure plate. Then, use a drilling machine with a threaded drill bit that matches the thread on the surface of the second screw to open a threaded hole at the top of the first screw. Select a bearing that matches the diameter of the second screw, and use an adhesive to sleeve and bond the bearing to the outer wall of the second screw. Select a nickel-based alloy cylindrical material and use a cutting machine to process it into a hexagonal block according to the hexagonal groove of the pressure plate. Use a drilling machine to penetrate the top of the hexagonal block according to the diameter of the bearing, and then use an adhesive to sleeve and bond the hexagonal block to the outer wall of the bearing.

[0013] Step three: chrome-plating the screw head, connecting column, second screw, pressure plate, first screw and hexagonal block obtained in step one and step two, making an injection mold according to the size of the screw head and connecting column processed in step one, making a rubber sleeve matching the appearance of the screw head by injection molding, making a compression mold according to the size of the pressure plate processed in step two, making a sealing ring matching the outer wall of the pressure plate by compression molding, sleeve-fitting and bonding the rubber sleeve to the appearance of the screw head by adhesive, sleeve-fitting and bonding the sealing ring to the outer wall of the pressure plate by adhesive.

[0014] Preferably, the adhesive proposed in step 2 is epoxy resin AB glue, and the adhesive proposed in step 3 is heat-vulcanized adhesive.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Through the cooperation between the sealing ring and the rubber sleeve, the gap between the seawater platform and the seawater generator set and the gap between the screw head and the seawater generator set can be sealed. At the same time, the rubber sleeve can wrap and protect the screw head, thereby ensuring that the entire bolt is in a sealed state after completing the seawater generator set fixing work, so as to prevent it from corrosion and rust;

[0017] 2. As the sealing ring becomes thinner due to the squeezing of the seawater platform and the seawater generator set, the seawater generator set and the seawater platform will come into contact with the anti-skid patterns on the upper and lower sides of the pressure plate, thereby improving the fixing stability of the bolts on the seawater generator set. Filling the hexagonal grooves with hexagonal blocks can effectively ensure the use strength of the entire bolt;

[0018] 3. The entire surface of the bolt is chrome-plated, which not only makes it anti-corrosion and anti-rust, but also increases the surface hardness and wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0020] In the attached picture:

[0021] Figure 1 This is a schematic structural diagram of an anti-corrosion and anti-rust bolt for an offshore generator set according to the present invention;

[0022] Figure 2 This is a bottom view of an anti-corrosion and anti-rust bolt for an offshore generator set of the present invention;

[0023] Figure 3 It is a front cross-sectional view of an anti-corrosion and anti-rust bolt for an offshore generator set of the present invention;

[0024] Figure 4 For the present invention Figure 3 A magnified view of part A;

[0025] Figure 5 For the present invention Figure 3 A magnified view of part B;

[0026] Figure 6 The present invention is a block diagram of a method for manufacturing anti-corrosion and anti-rust bolts for offshore generator sets.

[0027] In the figure: 1, rubber sleeve; 11, connecting column; 12, first screw; 13, pressure plate; 14, sealing ring; 15, screw head; 16, second screw; 17, bearing; 18, hexagonal block. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] like Figure 1-Figure 6 As shown, the present invention provides a technical solution: an anti-corrosion and anti-rust bolt for an offshore generator set, comprising a screw head 15, a pressure plate 13 and a first screw rod 12, a connecting column 11 is arranged at the bottom of the screw head 15, a second screw rod 16 is arranged at the bottom of the connecting column 11, a bearing 17 is arranged on the outer wall of the second screw rod 16, a hexagonal block 18 is arranged on the outer wall of the bearing 17, a hexagonal groove is arranged at the top of the screw head 15, a threaded hole is arranged at the top of the first screw rod 12, a hexagonal groove is penetrated through the top of the pressure plate 13, the second screw rod 16 penetrates the hexagonal groove of the pressure plate 13 and is threadedly connected with the threaded hole of the first screw rod 12, the hexagonal block 18 is inserted in the hexagonal groove of the pressure plate 13, and a sealing assembly is placed on the outer wall of the screw head 15.

[0030] The sealing assembly includes a rubber sleeve 1 and a sealing ring 14. The rubber sleeve 1 is wrapped around the outer wall of the screw head 15. The sealing ring 14 is arranged on the outer wall of the pressure plate 13. The thickness of the sealing ring 14 is 1.1 times that of the pressure plate 13. The rubber sleeve 1, the connecting column 11 and the second screw 16 are integrally formed. The first screw 12 and the pressure plate 13 are integrally formed. The total length of the diameter of the rubber sleeve 1 and the screw head 15 is the same as the total length of the diameter of the pressure plate 13 and the sealing ring 14. The outer walls of the screw head 15, the connecting column 11, the second screw 16, the pressure plate 13, the first screw 12 and the hexagonal block 18 are all plated with a chrome layer. The top and bottom of the pressure plate 13 are provided with anti-slip grooves. The materials of the screw head 15, the connecting column 11, the second screw 16, the pressure plate 13, the first screw 12 and the hexagonal block 18 are the same, all of which are nickel-based alloys. The materials of the rubber sleeve 1 and the sealing ring 14 are the same, all of which are EPDM rubber.

[0031] A method for manufacturing anti-corrosion and anti-rust bolts for offshore generator sets comprises the following steps:

[0032] Step 1: Select a nickel-based alloy cylindrical material and use a cutting machine to perform three-stage cutting. The upper end of the nickel-based alloy cylinder is cut into a screw head 15, the middle end is cut into a connecting column 11, and the lower end is cut into a second screw rod 16. The surface of the second screw rod 16 is processed into threads by a turning machine, and a hexagonal groove is opened on the top of the screw head 15 by a drilling machine with a hexagonal drill bit.

[0033] Step 2: Select a nickel-based alloy cylindrical material and use a cutting machine to perform two-stage cutting. The upper end of the nickel-based alloy cylinder is cut into a pressure plate 13, and the lower end is cut into a first screw 12. The surface of the first screw 12 is processed into a thread by a turning machine. The top of the pressure plate 13 is drilled through by a drilling machine with a hexagonal drill bit to open a hexagonal groove. The upper and lower surfaces of the pressure plate 13 are opened with a knurling machine. Anti-slip grooves are opened on the upper and lower surfaces of the pressure plate 13, and then a threaded hole is opened at the top of the first screw 12 by a drilling machine with a threaded drill bit that matches the surface thread of the second screw 16. A bearing 17 that matches the diameter of the second screw 16 is selected, and the bearing 17 is sleeved and bonded to the outer wall of the second screw 16 with an adhesive. A nickel-based alloy cylindrical material is selected and processed into a hexagonal block 18 according to the hexagonal groove of the pressure plate 13 using a cutting machine. According to the diameter of the bearing 17, a hole is drilled through the top of the hexagonal block 18 using a drilling machine, and then the hexagonal block 18 is sleeved and bonded to the outer wall of the bearing 17 with an adhesive.

[0034] Step three: chrome-plating the screw head 15, connecting column 11, second screw 16, pressure plate 13, first screw 12 and hexagonal block 18 obtained in step one and step two, making an injection mold according to the size of the screw head 15 and connecting column 11 processed in step one, making a rubber sleeve 1 matching the appearance of the screw head 15 by injection molding, making a compression mold according to the size of the pressure plate 13 processed in step two, making a sealing ring 14 matching the outer wall of the pressure plate 13 by compression molding, sleeve-fitting and bonding the rubber sleeve 1 to the appearance of the screw head 15 by adhesive, sleeve-fitting and bonding the sealing ring 14 to the outer wall of the pressure plate 13 by adhesive.

[0035] Wherein: the adhesive proposed in step 2 is epoxy resin AB glue, and the adhesive proposed in step 3 is a heat-vulcanized adhesive.

[0036] A method for using an anti-corrosion and anti-rust bolt for an offshore generator set:

[0037] Step 1: Use a hexagonal wrench to insert into the hexagonal groove of the pressure plate 13 and rotate it to screw the first screw 12 into the threaded hole of the seawater platform, then place the seawater generator set on the pressure plate 13, and align the bolt hole of the seawater generator set with the threaded hole of the first screw 12, then insert the connecting column 11 into the bolt hole of the seawater generator set, and align the second screw 16 with the threaded hole of the first screw 12.

[0038] Step 2: Insert the hexagonal wrench into the hexagonal groove of the screw head 15 and rotate it, thereby driving the connecting column 11 and the second screw 16 to rotate, so that the second screw 16 is screwed into the threaded hole of the first screw 12. As the second screw 16 is tightened in the threaded hole of the first screw 12, the first screw 12 is driven to be tightened in the threaded hole of the seawater platform. At this time, the upper and lower sides of the sealing ring 14 will fit tightly between the seawater platform and the seawater generator set, and play a sealing effect. As the sealing ring 14 is squeezed and thinned by the seawater platform and the seawater generator set, the seawater generator set and the seawater platform will contact the anti-slip grooves on the upper and lower sides of the pressure plate 13, thereby improving the bolt against. The fixing stability of the seawater generator set, and the bottom of the rubber sleeve 1 fits tightly with the top of the fixing foot of the seawater generator set to achieve a sealing effect. Through the cooperation of the sealing ring 14 and the rubber sleeve 1, the gap between the seawater platform and the seawater generator set and the gap between the screw head 15 and the seawater generator set can be sealed. At the same time, the rubber sleeve 1 can wrap and protect the screw head 15, thereby ensuring that the entire bolt is in a sealed state after completing the fixing work of the seawater generator set to prevent it from corrosion and rust. At the same time, the surface of the entire bolt is chrome-plated, which not only makes it have anti-corrosion and anti-rust functions, but also increases the surface hardness and wear resistance.

[0039] Step three: When the second screw 16 is threadedly connected to the threaded hole of the first screw 12, the hexagonal block 18 will be inserted into the hexagonal groove of the pressure plate 13. By filling the hexagonal groove, the service strength of the entire bolt can be effectively guaranteed, and the hexagonal block 18 can be rotated on the outer wall of the second screw 16 through the bearing 17, so that the hexagonal block 18 will not affect the rotation of the second screw 16 when it is inserted into the hexagonal groove.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-corrosion and anti-rust bolt for an offshore generator set, comprising a screw head (15), a pressure plate (13) and a first screw rod (12), wherein a connecting column (11) is arranged at the bottom of the screw head (15), a second screw rod (16) is arranged at the bottom of the connecting column (11), a bearing (17) is arranged on the outer wall of the second screw rod (16), a hexagonal block (18) is arranged on the outer wall of the bearing (17), a hexagonal groove is arranged at the top of the screw head (15), a threaded hole is arranged at the top of the first screw rod (12), a hexagonal groove is penetrated through the top of the pressure plate (13), the second screw rod (16) penetrates the hexagonal groove of the pressure plate (13) and is threadedly connected with the threaded hole of the first screw rod (12), the hexagonal block (18) is inserted into the hexagonal groove of the pressure plate (13), and a sealing component is placed on the outer wall of the screw head (15).

2. The anti-corrosion and anti-rust bolt for an offshore generator set according to claim 1, characterized in that: The sealing assembly comprises a rubber sleeve (1) and a sealing ring (14), wherein the rubber sleeve (1) is wrapped around the outer wall of the screw head (15), and the sealing ring (14) is arranged on the outer wall of the pressure plate (13), and the thickness of the sealing ring (14) is 1.1 times that of the pressure plate (13).

3. The anti-corrosion and anti-rust bolt for an offshore generator set according to claim 2, characterized in that: The rubber sleeve (1), the connecting column (11) and the second screw rod (16) are designed to be integrally formed, and the first screw rod (12) and the pressure plate (13) are designed to be integrally formed.

4. The anti-corrosion and anti-rust bolt for an offshore generator set according to claim 3, characterized in that: The total length of the diameters of the rubber sleeve (1) and the screw head (15) is the same as the total length of the diameters of the pressure plate (13) and the sealing ring (14).

5. The anti-corrosion and anti-rust bolt for an offshore generator set according to claim 4, characterized in that: The outer side walls of the screw head (15), the connecting column (11), the second screw rod (16), the pressure plate (13), the first screw rod (12) and the hexagonal block (18) are all plated with a chrome layer, and the top and bottom of the pressure plate (13) are provided with anti-slip grooves.

6. The anti-corrosion and anti-rust bolt for an offshore generator set according to claim 5, characterized in that: The screw head (15), the connecting column (11), the second screw rod (16), the pressure plate (13), the first screw rod (12) and the hexagonal block (18) are made of the same material, which is a nickel-based alloy.

7. The anti-corrosion and anti-rust bolt for an offshore generator set according to claim 6, characterized in that: The rubber sleeve (1) and the sealing ring (14) are made of the same material, which is EPDM rubber.

8. A method for manufacturing anti-corrosion and anti-rust bolts for offshore generator sets according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: A nickel-based alloy cylindrical material is selected and cut in three stages by a cutting machine, wherein the upper end of the nickel-based alloy cylinder is cut into a screw head (15), the middle end is cut into a connecting column (11), and the lower end is cut into a second screw rod (16). A thread is processed on the surface of the second screw rod (16) by a turning machine, and a hexagonal groove is opened on the top of the screw head (15) by a drilling machine with a hexagonal drill bit. Step 2: Select a nickel-based alloy cylindrical material and use a cutting machine to perform two-stage cutting, cut the upper end of the nickel-based alloy cylinder into a pressure plate (13), and cut the lower end into a first screw (12), and use a turning machine to process threads on the surface of the first screw (12), use a drilling machine with a hexagonal drill bit to penetrate the top of the pressure plate (13) to form a hexagonal groove, use a knurling machine to form anti-slip grooves on the upper and lower surfaces of the pressure plate (13), and then use a drilling machine with a screw thread that matches the surface thread of the second screw (16) at the top of the first screw (12). A threaded hole is opened with a thread drill, a bearing (17) matching the diameter of the second screw (16) is selected, and the bearing (17) is sleeved and bonded to the outer wall of the second screw (16) using an adhesive, a nickel-based alloy cylindrical material is selected and processed into a hexagonal block (18) using a cutting machine according to the hexagonal groove of the pressure plate (13), and a hole is drilled through the top of the hexagonal block (18) according to the diameter of the bearing (17), and then the hexagonal block (18) is sleeved and bonded to the outer wall of the bearing (17) using an adhesive. Step 3: Chrome-plating the screw head (15), the connecting column (11), the second screw rod (16), the pressure plate (13), the first screw rod (12) and the hexagonal block (18) obtained in steps 1 and 2, making an injection mold according to the size of the screw head (15) and the connecting column (11) processed in step 1, making a rubber sleeve (1) matching the appearance of the screw head (15) by injection molding, making a compression mold according to the size of the pressure plate (13) processed in step 2, making a sealing ring (14) matching the outer wall of the pressure plate (13) by compression molding, sleeve-fitting and bonding the rubber sleeve (1) to the outer surface of the screw head (15) by adhesive, sleeve-fitting and bonding the sealing ring (14) to the outer wall of the pressure plate (13) by adhesive.

9. The method for manufacturing anti-corrosion and anti-rust bolts for offshore generator sets according to claim 8, characterized in that: The adhesive proposed in step 2 is epoxy resin AB glue, and the adhesive proposed in step 3 is a heat-vulcanized adhesive.

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