Fastening type rust-proof bolt capable of relieving pressure
By incorporating a pressure relief channel and a pressure relief block within the bolt head and body, the problem of insufficient pressure relief in bolt structures under high-pressure environments is solved, enabling automatic pressure relief and convenient operation, thus improving safety and flexibility.
Patent Information
- Application Number
- CN202422964007.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-03
AI Technical Summary
The existing pressure relief structure of bolted structures in high-pressure environments is insufficient, which can easily lead to pressure overload inside the container and cause safety accidents.
Design a fastening type pressure-relieving rust-proof bolt with a connecting pressure relief channel in the bolt head and bolt body, equipped with a pressure relief block and spring mechanism to achieve automatic pressure relief, and a flip-up handle is provided at the notch of the bolt head for easy operation.
It enables automatic pressure relief under high pressure conditions, avoids pressure overload, ensures safety, and facilitates bolt operation in confined spaces, improving both flexibility and safety.
Smart Images
Figure CN223536728U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bolt technology, and in particular to a fastening type pressure-relieving rust-proof bolt. Background Technology
[0002] A bolt is a common fastener used to connect two or more objects together. It typically consists of a thread, a head, and a nut. Pressure is applied by rotating the nut to secure the objects together. Bolts are indispensable fasteners in modern industry and daily life, and come in a wide variety of types and specifications to meet diverse connection needs.
[0003] Fastening sealing bolts are specially designed bolts to provide strong fastening force and reliable sealing performance. Fastening sealing bolts typically have higher strength and hardness, can withstand greater torque and tensile force, and are suitable for applications requiring high-strength fastening, such as heavy machinery, bridge structures, and high-pressure vessels.
[0004] Currently, in bolted structures used in some high-pressure environments, bolts can be used to seal unused through holes or interfaces in production containers. However, some high-pressure containers have many interfaces and only have a single pressure relief structure at the end cap. If there is a problem with this pressure relief structure, it can easily lead to pressure overload inside the container and cause a safety accident. Utility Model Content
[0005] The purpose of this utility model is to address the aforementioned shortcomings in the existing technology by proposing a fastening type pressure-relieving rust-proof bolt.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] Design a fastening type pressure-relief rust-proof bolt, including a bolt head, a bolt body provided on one side of the bolt head, the bolt head having a hexagonal structure, the outer wall surface of the bolt body being provided with external threads, a first pressure relief channel being provided through the center of the bolt head, and a second pressure relief channel being provided through the center of the bolt body, the second pressure relief channel being interconnected with the first pressure relief channel;
[0008] A positioning plate is welded and fixed to the inner wall of the second pressure relief channel. A pressure relief hole is opened at the center of the positioning plate. A connecting sleeve is inserted through the center of the pressure relief hole. The outer wall of the connecting sleeve is fixedly assembled with the inner wall of the pressure relief hole through a bracket. A connecting rod is inserted through the inside of the pressure relief hole. The surface of the connecting rod is slidably sleeved with the inside of the pressure relief hole. A movable pressure relief block is fixed to one end of the connecting rod. One side of the pressure relief block is tightly attached to the surface of the positioning plate. An anti-detachment block is fixed to the other end of the connecting rod. A first spring is wound around the surface of the connecting rod. The two ends of the first spring are fixedly connected to the surface of the anti-detachment block and the end face of the connecting sleeve, respectively.
[0009] In detail, the bolt head has notches on both sides, and a bearing seat is fixed inside the notch. There are two bearing seats, which are welded and fixed to the inner wall of the notch. The inner walls of the two bearing seats are both through and fixedly fitted with a support shaft.
[0010] In detail, a bushing is rotatably fitted onto the surface of the support shaft, and a handle is welded and fixed to the outer wall of the bushing. A retractable limiting pin is also provided in the notch, with one side of the limiting pin tightly fitted to the lower end of the handle.
[0011] In detail, the notch has a groove inside, the limiting pin is slidably sleeved with the groove, and a second spring is provided inside the groove. The two ends of the second spring are fixedly assembled with the surface of the limiting pin and the inner wall of the groove, respectively.
[0012] In detail, the bolt head is composed of a base layer, a rust-proof layer and an outer protective layer in sequence. The surface of the base layer is plated with a rust-proof layer, and the surface of the rust-proof layer is coated with an outer protective layer. The bolt body and the bolt head have the same structural composition.
[0013] In detail, the base layer is made of stainless steel.
[0014] In detail, the rust-proof layer is made of galvanized material.
[0015] In detail, the outer protective layer is made of polytetrafluoroethylene coating material.
[0016] The design scheme proposed in this utility model has the following beneficial effects in application:
[0017] 1. The bolt head and bolt body can be threaded together with the threaded hole or threaded sleeve of the high-pressure vessel to achieve sealing. In order to assist in venting, pressure relief channels are provided inside the bolt head and bolt body. After the pressure enters the pressure relief channel, it overflows through the pressure relief hole, which can lift the pressure relief block that is sealing the pressure relief hole to vent and relieve pressure. After the pressure relief is completed, the pressure relief block can be reset by the reset effect of the first spring and cover the positioning plate again to seal the pressure relief hole.
[0018] 2. A notch is made in the bolt head, and a handle is installed inside. When turning the bolt, it can be operated with a wrench. When the space is narrow, the limit pin can be pressed to open one side of the handle. By placing the handle between the thumb and forefinger, a point of force can be provided, thereby assisting in turning the bolt. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2This is a schematic diagram of the internal structure of the pressure relief channel of this utility model;
[0021] Figure 3 This is an enlarged schematic diagram of point A in this utility model;
[0022] Figure 4 This is a front view of the bolt head of this utility model;
[0023] Figure 5 This is an enlarged schematic diagram of section B of this utility model;
[0024] Figure 6 This is a schematic diagram of the bolt head structure of this utility model.
[0025] In the diagram: 1. Bolt head; 11. Bolt body; 12. First pressure relief channel; 13. Second pressure relief channel; 14. Positioning plate; 15. Pressure relief hole; 16. Connecting sleeve; 17. Connecting rod; 18. Anti-detachment block; 19. First spring; 110. Pressure relief block; 2. Notch; 21. Shaft seat; 22. Support shaft; 23. Handle lever; 24. Limit pin; 25. Groove; 26. Second spring; 27. Shaft sleeve; 1001. Base layer; 1002. Rust prevention layer; 1003. Outer protective layer. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0027] Reference Figures 1-6 A type of fastening pressure-relieving rust-proof bolt includes a bolt head 1, a bolt body 11 on one side of the bolt head 1, the bolt head 1 having a hexagonal structure, an external thread on the outer wall of the bolt body 11, a first pressure relief channel 12 penetrating through the center of the bolt head 1, and a second pressure relief channel 13 penetrating through the center of the bolt body 11, the second pressure relief channel 13 being interconnected with the first pressure relief channel 12;
[0028] A positioning plate 14 is welded and fixed to the inner wall of the second pressure relief channel 13. A pressure relief hole 15 is opened at the center of the positioning plate 14. A connecting sleeve 16 is inserted through the center of the pressure relief hole 15. The outer wall of the connecting sleeve 16 is fixedly assembled with the inner wall of the pressure relief hole 15 through a bracket. A connecting rod 17 is inserted through the inside of the pressure relief hole 15. The surface of the connecting rod 17 is slidably sleeved with the inside of the pressure relief hole 15. A movable pressure relief block 110 is fixed to one end of the connecting rod 17. One side of the pressure relief block 110 is tightly attached to the surface of the positioning plate 14. An anti-detachment block 18 is fixed to the other end of the connecting rod 17. A first spring 19 is wound around the surface of the connecting rod 17. The two ends of the first spring 19 are fixedly connected to the surface of the anti-detachment block 18 and the end face of the connecting sleeve 16, respectively.
[0029] It should be further explained that notches 2 are provided on both sides of the bolt head 1, and a bearing seat 21 is fixed inside the notch 2. There are two bearing seats 21, which are welded and fixed to the inner wall of the notch 2. The inner walls of the two bearing seats 21 are both connected to a support shaft 22.
[0030] It should be further explained that a bushing 27 is rotatably fitted onto the surface of the support shaft 22, and a handle 23 is welded and fixed to the outer wall of the bushing 27. A retractable limiting pin 24 is also provided in the notch 2. One side of the limiting pin 24 is tightly fitted to the lower end of the handle 23. The limiting pin 24 can limit the handle 23 in the notch 2 when it is not in use. The setting of the handle 23 does not affect the normal wrench rotation operation. At the same time, in the narrow space below, a single handle 23 can be flipped to open the handle 23. The bolt can be rotated as a whole by holding the handle 23 between the thumb and forefinger. Only one handle 23 is used, not both sides at the same time. Opening both sides at the same time would greatly increase the space occupied and is not suitable for opening operations in the narrow space below.
[0031] It should be further explained that a groove 25 is provided inside the notch 2, and the limiting pin 24 is slidably sleeved with the groove 25. A second spring 26 is provided inside the groove 25. The two ends of the second spring 26 are fixedly assembled with the surface of the limiting pin 24 and the inner wall of the groove 25, respectively. The second spring 26 can ensure the stability of the extension and repositioning of the limiting pin 24.
[0032] It should be further noted that the bolt head 1 is composed of a base layer 1001, a rust-proof layer 1002, and an outer protective layer 1003 in sequence. The surface of the base layer 1001 is plated with the rust-proof layer 1002, and the surface of the rust-proof layer 1002 is coated with the outer protective layer 1003. The bolt body 11 has the same structural composition as the bolt head 1.
[0033] It should be further noted that the base layer 1001 is made of stainless steel, which has sufficient hardness and can improve the stability of the structural installation strength.
[0034] It should be further noted that the rust-proof layer 1002 is made of galvanized material, which can further protect the stainless steel surface from rust.
[0035] It should be further noted that the outer protective layer 1003 is made of polytetrafluoroethylene material, which can provide wear-resistant protection for the galvanized anti-rust layer 1002.
[0036] Working principle: The bolt head 1 and bolt body 11 are engaged with the threaded hole or threaded sleeve of the high-pressure vessel to achieve a seal. In order to assist in venting, the bolt head 1 and bolt body 11 are provided with pressure relief channels. After the pressure enters the pressure relief channel, it overflows through the pressure relief hole 15, which can lift the pressure relief block 110 that is sealing the pressure relief hole 15 to vent and relieve pressure. After the pressure relief is completed, the pressure relief block 110 can be reset by the reset effect of the first spring 19 and cover the positioning plate 14 again to seal the pressure relief hole 15.
[0037] A notch 2 is made in the bolt head 1, and a handle 23 is provided inside. When turning the bolt, it can be operated with a wrench. When the space is narrow, the limit pin 24 can be pressed to open the handle 23 on one side. By placing the handle 23 between the thumb and forefinger, a point of force can be provided, thereby assisting in turning the bolt.
[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A fastening type pressure-relief rust-proof bolt, comprising a bolt head (1), characterized in that: The bolt head (1) has a bolt body (11) on one side. The bolt head (1) has a hexagonal structure. The outer wall of the bolt body (11) is provided with external threads. A first pressure relief channel (12) is provided through the center of the bolt head (1). A second pressure relief channel (13) is provided through the center of the bolt body (11). The second pressure relief channel (13) and the first pressure relief channel (12) are connected to each other. A positioning plate (14) is welded and fixed on the inner wall of the second pressure relief channel (13). A pressure relief hole (15) is opened at the center of the positioning plate (14). A connecting sleeve (16) is installed through the center of the pressure relief hole (15). The outer wall of the connecting sleeve (16) is fixedly assembled with the inner wall of the pressure relief hole (15) through a bracket. A connecting rod (17) is installed through the inside of the pressure relief hole (15). The surface of the connecting rod (17) is slidably sleeved with the inside of the pressure relief hole (15). A movable pressure relief block (110) is fixed at one end of the connecting rod (17). One side of the pressure relief block (110) is tightly attached to the surface of the positioning plate (14). An anti-detachment block (18) is fixed at the other end of the connecting rod (17). A first spring (19) is wound around the surface of the connecting rod (17). The two ends of the first spring (19) are fixedly connected to the surface of the anti-detachment block (18) and the end face of the connecting sleeve (16), respectively.
2. The fastening type pressure-relief rust-proof bolt according to claim 1, characterized in that: The bolt head (1) has notches (2) on both sides. A bearing seat (21) is fixed inside the notch (2). There are two bearing seats (21), which are welded and fixed to the inner wall of the notch (2). The inner walls of the two bearing seats (21) are both connected to a support shaft (22).
3. A fastening type pressure-relief rust-proof bolt according to claim 2, characterized in that: The surface of the support shaft (22) is rotatably fitted with a bushing (27), and a handle (23) is welded and fixed to the outer wall of the bushing (27). A retractable limiting pin (24) is also provided in the notch (2), and one side of the limiting pin (24) is tightly fitted to the lower end of the handle (23).
4. A fastening type pressure-relief rust-proof bolt according to claim 3, characterized in that: The notch (2) has a groove (25) inside. The limiting pin (24) and the groove (25) are slidably sleeved together. The groove (25) has a second spring (26) inside. The two ends of the second spring (26) are fixedly assembled with the surface of the limiting pin (24) and the inner wall of the groove (25) respectively.
5. A fastening type pressure-relief rust-proof bolt according to claim 1, characterized in that: The bolt head (1) is composed of a base layer (1001), a rust-proof layer (1002) and an outer protective layer (1003) in sequence. The surface of the base layer (1001) is plated with a rust-proof layer (1002), and the surface of the rust-proof layer (1002) is coated with an outer protective layer (1003). The bolt body (11) has the same structural composition as the bolt head (1).
6. A fastening type pressure-relief rust-proof bolt according to claim 5, characterized in that: The base layer (1001) is made of stainless steel.
7. A fastening type pressure-relief rust-proof bolt according to claim 6, characterized in that: The rust-proof layer (1002) is made of galvanized material.
8. A fastening type pressure-relief rust-proof bolt according to claim 7, characterized in that: The outer protective layer (1003) is made of polytetrafluoroethylene material coating.