Flange connecting bolt anti-falling device

Abstract

The utility model discloses a flange connecting bolt anti-falling device which comprises a first flange, a second flange and a bolt, the second flange comprises a connecting flange and a fixing flange, and the fixing flange is arranged on the side, away from the first flange, of the connecting flange. The first flange, the connecting flange and the fixed flange are respectively provided with a plurality of threaded holes, connecting holes and fixed holes which are sequentially connected with bolts; the bolt is provided with a screw part and a fixing part, and when the screw part is connected with or separated from the threaded hole, the bolt is in a connected state and a separated state; when the bolt is in a disengaged state, the fixing part can be connected to the fixing hole; according to the device, bolts can be fixed through the fixing flanges and the fixing holes in the transferring or other operation process, so that the bolts cannot fall off accidentally, and the safety during working is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of flange connection, in particular to a flange connection bolt anti-falling device. Background Art

[0002] Flange connections are usually made with bolts, and the upper and lower flanges need to be connected as a whole and pre-tightened on site by bolts.

[0003] For example, the steel pipe flange bolt internal thread connection structure provided by publication number CN103669593A includes a large diameter steel pipe, a large diameter steel pipe flange, a small diameter steel pipe, a small diameter steel pipe flange and bolts; the large diameter steel pipe is butt-jointed with the small diameter steel pipe, and the large diameter steel pipe flange and the small diameter steel pipe flange are connected by bolts; the large diameter steel pipe flange is provided with an internal thread hole, the hole diameter matches the bolt diameter, the small diameter steel pipe flange is provided with a bolt hole, the hole diameter is 1.5 to 2 mm larger than the bolt diameter, the bolt passes through the bolt hole on the small diameter steel pipe flange, and is tightened and screwed into the internal thread hole on the large diameter steel pipe flange, and the bolt length exposes two threads of the large diameter steel pipe flange; it realizes the connection of the steel pipe through the flange.

[0004] However, in some special occasions, manual operation (the process of transferring bolts and rotating holes for installation) can easily cause bolts to fall, especially in some dangerous occasions: flange connections for high-altitude operations, flange connections next to nuclear reactor pools, flange connections for two-stage test wells of missile bodies, etc. If bolts fall, major safety failures will occur. Utility Model Content

[0005] The purpose of the utility model is to overcome the above technical deficiencies and propose a flange connection bolt anti-falling device to solve the technical problem in the prior art that flange connections are prone to bolt falling during manual operation, which may cause major safety failures.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a flange connection bolt anti-falling device, comprising: a first flange, a second flange and a bolt, the second flange comprising a connecting flange and a fixing flange, the fixing flange being arranged on a side of the connecting flange away from the first flange, the first flange, the connecting flange and the fixing flange being respectively provided with a plurality of threaded holes, connecting holes and fixing holes for sequentially connecting the bolts; the bolt having a screw portion and a fixing portion, when the screw portion is connected to or disengaged from the threaded hole, the bolt respectively forms a connected state and a disengaged state; when the bolt is in the disengaged state, the fixing portion can be connected to the fixing hole. During operation, the bolt passes through the fixing hole, the connecting hole and the threaded hole in sequence and is threadedly connected to the threaded hole to achieve connection to the flange. When the bolt is in a disengaged state, its screw portion is disengaged from the threaded hole, and the fixing portion can be connected to the fixing hole. When the bolt is disengaged from the first flange during operation, the bolt can be fixed through the fixing hole of the fixing flange; when the first flange and the second flange need to be fixed, the fixing portion can be adjusted to be disengaged from the fixing hole. At this time, the bolt can move toward the threaded hole and can be used to adjust the alignment of the second flange and the threaded hole of the first flange. When aligning, the bolt can remain connected to the fixing flange, thereby preventing the bolt from falling.

[0008] In some embodiments, the bolt includes a rod body and a nut connected to the rod body, the screw portion is the end of the rod body facing away from the nut, and a first external thread is provided on the outer side of the screw portion so as to be threadedly connected to the threaded hole of the first flange by using the first external thread; the fixing portion is the portion protruding outward from the middle part of the rod body, and a second external thread is provided on the outer side of the fixing portion, and the fixing portion is threadedly connected to the fixing hole via the second external thread.

[0009] In some embodiments, the portion of the fixing hole close to the connecting flange is a thread hole, and the other portion of the fixing hole is a light hole, the thread hole is threadedly connected with the second external thread, and the diameter of the light hole is larger than the diameter of the thread hole. A gasket is sleeved on the outer side of the screw portion, and the inner diameter of the gasket is larger than the diameter of the screw portion and smaller than the diameter of the fixing portion.

[0010] In some embodiments, the first flange is located below the second flange. The flange connection bolt anti-dropping device also includes a first connecting rod and a second connecting rod, the first flange is connected to the end of the first connecting rod, the second flange is connected to the second connecting rod, and the connecting flange is located at the end of the second connecting rod, so that the first connecting rod and the second connecting rod can be fixed by using the first flange and the second flange.

[0011] In some embodiments, the connecting flange has a connecting surface, the connecting surface is used to connect the first flange, and the connecting surface is the surface of the connecting flange facing away from the fixed flange. The middle of the side surface of the connecting flange facing away from the fixed flange is recessed inward to form a groove. At this time, the inner wall of the groove is the connecting surface. When the first flange is connected to the second flange, the first flange is at least partially built into the groove and is closely connected to the connecting surface.

[0012] Compared with the prior art, the flange connection bolt anti-falling device provided by the utility model has a first flange, a second flange and a bolt, and when working, the bolt connects the fixing hole, the connecting hole and the threaded hole in sequence to realize the connection of the flange plate; when the screw part is used to connect or disengage from the threaded hole, the bolt forms a connected state and a disengaged state respectively, and when the bolt is disengaged from the first flange during operation, the fixing part can be connected to the fixing hole of the fixing flange to realize the fixation of the bolt; when the first flange and the second flange need to be fixed, the fixing part can be adjusted to disengage from the fixing hole, and at this time the bolt can be moved toward the threaded hole, which can be used to adjust the alignment of the second flange and the threaded hole of the first flange. When aligning, the bolt can remain connected to the fixing flange, thereby preventing the bolt from falling off; the bolt will not accidentally fall off during transportation or other operations, thereby ensuring safety during work. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the flange connection bolt anti-falling device provided by the embodiment of the utility model;

[0014] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the bolt of the flange connection bolt anti-falling device provided by the embodiment of the utility model when the bolt is in a connected state;

[0015] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the flange connection bolt anti-dropping device provided by the embodiment of the utility model when the bolts are in a disengaged state;

[0016] Figure 4 It is a schematic cross-sectional structure diagram of a second flange of a flange connection bolt anti-falling device provided by an embodiment of the utility model;

[0017] Figure 5 It is a structural schematic diagram of the state in which the second flange bolt of the flange connection bolt anti-falling device provided by the embodiment of the utility model is screwed down and aligned with the second flange;

[0018] Figure 6 It is a schematic diagram of the structure of the bolts of the flange connection bolt anti-falling device provided in an embodiment of the utility model.

[0019] Description of reference numerals:

[0020] 1. First flange; 11. Threaded hole;

[0021] 2. Second flange; 21. Connecting flange; 211. Connecting hole; 212. Groove; 22. Fixing flange; 221. Fixing hole;

[0022] 3. Bolt; 31. Rod body; 32. Nut; 301. Screw part; 302. Fixing part;

[0023] 4. First connecting rod; 5. Second connecting rod; 6. Gasket. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] In order to solve the technical problem that flange connections are prone to bolts falling off during manual operation, which may cause major safety failures, the utility model provides a flange connection bolt anti-falling device, which can fix the bolts during transportation or other operations through the fixing flange and the fixing hole, so that the bolts will not fall off accidentally, thereby ensuring safety during work.

[0026] See also Figures 1 to 6 The flange connection bolt anti-falling device comprises: a first flange 1, a second flange 2 and a bolt 3, the second flange 2 comprises a connecting flange 21 and a fixing flange 22, the fixing flange 22 is arranged on the side of the connecting flange 21 away from the first flange 1, and the first flange 1, the connecting flange 21 and the fixing flange 22 are respectively provided with a plurality of threaded holes 11, a connecting hole 211 and a fixing hole 221 for sequentially connecting the bolt 3; the bolt 3 has a screw portion 301 and a fixing portion 302, and when the screw portion 301 is connected to or disengaged from the threaded hole 11, the bolt 3 is respectively formed in a connected state and a disengaged state; when the bolt 3 is in a disengaged state, the fixing portion 302 can be connected to the fixing hole 221.

[0027] In the present device, a first flange 1, a second flange 2 and a bolt 3 are provided. The second flange 2 includes a connecting flange 21 and a fixing flange 22. The first flange 1, the connecting flange 21 and the fixing flange 22 are respectively provided with a plurality of threaded holes 11, a connecting hole 211 and a fixing hole 221. The plurality of threaded holes 11, the connecting hole 211 and the fixing hole 221 are used to connect the bolts 3 in sequence. Since the fixing flange 22 is arranged on the side of the connecting flange 21 away from the first flange 1, when the bolts 3 are connected to the first flange 1 and the second flange 2, they will pass through the fixing hole 221, the connecting hole 211 and the threaded hole 11 in sequence and be threadedly connected with the threaded hole 11 to realize the connection of the flange.

[0028] In addition, the bolt 3 has a screw portion 301 and a fixing portion 302. When the screw portion 301 is used to connect to or disengage from the threaded hole 11, the bolt 3 forms a connected state and a disengaged state respectively. When the bolt 3 is in the disengaged state, its screw portion 301 is disengaged from the threaded hole 11, and its fixing portion 302 can be connected to the fixing hole 221. Therefore, when the bolt 3 is disengaged from the first flange 1 during operation, the bolt 3 can be fixed by the fixing hole 221 of the fixing flange 22; when the first flange 1 and the second flange 2 need to be fixed, the fixing portion 302 can be adjusted to disengage from the fixing hole 221. At this time, the bolt 3 can be moved toward the threaded hole 11, which can be used to adjust the alignment of the second flange 2 and the first flange 1. During the alignment, the bolt 3 can remain connected to the fixing flange 22, thereby preventing the bolt 3 from falling off; so that the bolt 3 will not accidentally fall off during transportation or other operations, thereby ensuring safety during work.

[0029] In this embodiment, the first flange 1 and the second flange 2 are used for docking installation of a vertical pipe or a vertical connecting rod, and the first flange 1 is located below the second flange 2. The first flange 1 is used as a lower flange, and the second flange 2 is used as an upper flange. When the bolt 3 is in a disengaged state, the bolt 3 is located above the first flange 1, which is conducive to preventing the bolt 3 from being disengaged.

[0030] It should be noted that, in other embodiments, the positions of the first flange 1 and the second flange 2 are not limited thereto, and the first flange 1 can also be arranged above the second flange 2 for use. When the first flange 1 and the second flange 2 are used for docking installation of transverse pipes or connecting rods, the first flange 1 and the second flange 2 can also be arranged side by side on the left and right.

[0031] In some embodiments, the flange connection bolt anti-falling device also includes a first connecting rod 4 and a second connecting rod 5, the first connecting rod 4 and the second connecting rod 5 are both vertically arranged, and the first connecting rod 4 is located below the second connecting rod 5, the first flange 1 is fixedly connected to the top end of the first connecting rod 4, the second flange 2 is fixedly connected to the second connecting rod 5, and the connecting flange 21 is located at the bottom end of the second connecting rod 5, the fixing flange 22 is located above the connecting flange 21 and is spaced apart from the connecting flange 21, and the first flange 1 and the second flange 2 can be fixed by using the bolt 3 to penetrate the connecting fixing hole 221, the connecting hole 211 and the threaded hole 11, thereby realizing the fixation of the first flange 1 and the second flange 2, thereby realizing the fixation of the first connecting rod 4 and the second connecting rod 5.

[0032] The bolt 3 has a screw portion 301 and a fixing portion 302, the screw portion 301 is used to connect to the threaded hole 11 of the first flange 1, and the fixing portion 302 is used to connect to the fixing hole 221 of the fixing flange 22. Therefore, in this embodiment, the bolt 3 includes a rod body 31 and a nut 32, wherein the screw portion 301 is one end of the rod body 31 away from the nut 32, and the outer side of the screw portion 301 is provided with a first external thread, and the first external thread is threadedly connected with the threaded hole 11 in an adaptive manner; the fixing portion 302 is a portion protruding outward from the middle part of the rod body 31, the top of the rod body 31 of the bolt 3 passes through the fixing hole 221 of the fixing flange 22, and the nut 32 is arranged above the fixing flange 22 and fixedly connected to the rod body 31; during implementation, the threaded hole 11 of the first flange 1 can be connected through the first external thread, and when the first external thread is separated from the threaded hole 11, the protruding portion in the middle part of the rod body 31 can be used to connect to the fixing hole 221.

[0033] In one embodiment, the outer side of the fixing portion 302 is provided with a second external thread, the part of the fixing hole 221 close to the connecting flange 21 is a thread hole, and the other part of the fixing hole 221 is a light hole. The thread hole is threadedly connected with the second external thread of the fixing portion 302 to temporarily store the bolt 3. When the second flange 2 is not connected, the thread of the lower thread hole is connected and fixed to the fixing portion 302 of the bolt 3. This state is the bolt 3 disengaged state. The bolt 3 is fixed on the bolt 3 fixing flange 22 of the second flange 2, and the bolt 3 will not fall off accidentally during the transportation process. When it is necessary to connect with the first flange 1, the bolt 3 is rotated downward, and the bolt 3 is disengaged from the fixing flange 22. In this state, the bolt 3 is provided with gaps above and below, which can be used for adjustment and connection and fixing with the first flange 1.

[0034] Furthermore, the diameter of the light hole is larger than the diameter of the thread hole, so that after the fixing portion 302 of the bolt 3 is connected to the thread hole, it can continue to rotate upward into the light hole, so that the bolt 3 can be removed.

[0035] It can be understood that a plain hole is a hole in a planar shape, and a thread hole is a hole with an internal thread.

[0036] In other embodiments, a block or a slot may be provided on the outside of the fixing portion 302 , and a corresponding slot or block may be provided in the fixing hole 221 , so as to realize the snap connection and fixation between the fixing portion 302 and the fixing hole 221 , thereby preventing the bolt 3 from falling off.

[0037] In order to improve the stability of the flange connection, in this embodiment, a gasket 6 is sleeved on the outer side of the screw portion 301, the inner diameter of the gasket 6 is larger than the diameter of the screw portion 301, and the inner diameter of the gasket 6 is smaller than the diameter of the fixing portion 302. When the bolt 3 is connected to the first flange 1, the gasket 6 can be cushioned between the fixing portion 302 of the bolt 3 and the connecting flange 21, thereby improving the stability of the flange connection.

[0038] In this embodiment, the connecting flange 21 has a connecting surface for connecting to the first flange 1 , and the connecting surface is the surface of the connecting flange 21 facing away from the fixing flange 22 . The connecting flange 21 is in contact with and connected to the first flange 1 via the connecting surface.

[0039] In one of the embodiments, the connecting flange 21 is recessed inwardly in the middle of the side surface away from the fixing flange 22 to form a groove 212, and the inner wall surface of the groove 212 is the connecting surface. When the first flange 1 is connected to the second flange 2, the top part of the first flange 1 is inserted into the groove 212 so that the top surface of the first flange 1 is fitted and connected to the connecting surface, and then the first flange 1 is fixed with the bolts 3, so that the connection between the first flange 1 and the connecting flange 21 is more stable.

[0040] In other embodiments, the connection surface of the connection flange 21 is not limited to being the inner wall surface of the groove 212, and the connection surface may also be other shapes such as a plane, a curved surface, or a corrugated surface.

[0041] Working principle: Before construction, the connecting flange 21 and the fixing flange 22 are welded and fixed on the second connecting rod 5, and the connecting hole 211 corresponds to the fixing hole 221 one by one, and the first flange 1 is welded and fixed on the first connecting rod 4. During implementation, before the first connecting rod 4 is docked with the second connecting rod 5, the bolt 3 is passed through the fixing hole 221 and the connecting hole 211. When the fixing part 302 of the bolt 3 contacts the thread hole, the bolt 3 is screwed downward so that the fixing part 302 is threadedly connected to the thread hole, and then the first connecting rod 4 is docked with the second connecting rod 5. After docking, the bolt 3 is further screwed downward to disengage the fixing part 302 from the thread hole. At this time, the fixing part 302 is restricted between the fixing flange 22 and the connecting flange 21, and the bolt 3 can move downward. At this time, the staff can use the bolt 3 to align and adjust the threaded hole 11 of the first flange 1. After the bolt 3 corresponds to the threaded hole 11, the bolt 3 is screwed downward into the threaded hole 11 of the first flange 1 until the gasket 6 is compressed.

[0042] The utility model provides a first flange 1, a second flange 2 and a bolt 3. When working, the bolt 3 is sequentially connected to the fixing hole 221, the connecting hole 211 and the threaded hole 11 to achieve the connection to the flange plate; when the screw portion 301 is used to connect or disengage from the threaded hole 11, the bolt 3 is respectively formed in a connected state and a disengaged state. When the bolt 3 is disengaged from the first flange 1 during operation, the fixing portion 302 can be used to connect to the fixing hole 221 of the fixing flange 22 to achieve the fixing of the bolt 3; when the first flange 1 and the second flange 2 need to be fixed, the fixing portion 302 can be adjusted to disengage from the fixing hole 221. At this time, the bolt 3 can be moved toward the threaded hole 11, which can be used to adjust the alignment of the second flange 2 and the first flange 1. When aligning, the bolt 3 can remain connected to the fixing flange 22, thereby preventing the bolt 3 from falling off; so that the bolt 3 will not accidentally fall off during transportation or other operations, thereby ensuring safety during work.

[0043] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A flange connection bolt anti-dropping device, characterized in that: include: First flange; a second flange, the second flange comprising a connecting flange and a fixing flange, the fixing flange being arranged on a side of the connecting flange away from the first flange, the first flange, the connecting flange and the fixing flange respectively being provided with a plurality of threaded holes, connecting holes and fixing holes for connecting bolts in sequence; and A bolt comprises a screw portion and a fixing portion. When the screw portion is connected to or separated from a threaded hole, the bolt forms a connected state and a separated state respectively. When the bolt is in the separated state, the fixing portion can be connected to the fixing hole.

2. The flange connection bolt anti-dropping device according to claim 1, characterized in that: The bolt includes a rod body and a nut connected to the rod body, the screw portion is an end of the rod body away from the nut, and a first external thread is arranged on the outer side of the screw portion; the fixing portion is a portion protruding outward from the middle of the rod body.

3. The flange connection bolt anti-dropping device according to claim 2, characterized in that: A second external thread is provided on the outer side of the fixing portion, and the fixing portion is threadedly connected to the fixing hole through the second external thread.

4. The flange connection bolt anti-dropping device according to claim 3, characterized in that: The portion of the fixing hole close to the connecting flange is a threaded hole, and the other portion of the fixing hole is a light hole. The threaded hole is threadedly connected with the second external thread.

5. The flange connection bolt anti-dropping device according to claim 4, characterized in that: The diameter of the light hole is larger than the diameter of the wire hole.

6. The flange connection bolt anti-dropping device according to claim 2, characterized in that: A gasket is sleeved on the outer side of the screw portion, and the inner diameter of the gasket is larger than the diameter of the screw portion and smaller than the diameter of the fixing portion.

7. The flange connection bolt anti-dropping device according to claim 1, characterized in that: The first flange is located below the second flange.

8. The flange connection bolt anti-dropping device according to claim 1, characterized in that: The flange connection bolt anti-falling device also includes a first connecting rod and a second connecting rod, the first flange is connected to the end of the first connecting rod, the second flange is connected to the second connecting rod, and the connecting flange is located at the end of the second connecting rod.

9. The flange connection bolt anti-dropping device according to claim 8, characterized in that: The connecting flange has a connecting surface for connecting to the first flange, and the connecting surface is a surface of the connecting flange facing away from the fixing flange.

10. The flange connection bolt anti-dropping device according to claim 9, characterized in that: The connecting flange is recessed inwardly from the middle of the side surface of the fixing flange to form a groove, and the inner wall of the groove forms the connecting surface. When the first flange is connected to the second flange, the first flange is at least partially embedded in the groove and is closely connected to the connecting surface.

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