CN201991912U - Bolt protecting device - Google Patents
Bolt protecting device Download PDFInfo
- Publication number
- CN201991912U CN201991912U CN 201120136642 CN201120136642U CN201991912U CN 201991912 U CN201991912 U CN 201991912U CN 201120136642 CN201120136642 CN 201120136642 CN 201120136642 U CN201120136642 U CN 201120136642U CN 201991912 U CN201991912 U CN 201991912U
- Authority
- CN
- China
- Prior art keywords
- bolt
- screw rod
- protective gear
- end cap
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a bolt protecting device, which is characterized by comprising a stainless steel closed outer sleeve which is sleeved on a screw to be protected, wherein the outer sleeve is provided with a mounting hole, and the inner wall of the mounting hole is provided with a thread which is matched with the screw to be protected. Preferably, the outer sleeve comprises an end cover, and a bushing which is annularly sleeved on the screw of a bolt and a tail cover; and the mounting hole is arranged on the end cover, one end surface of the bushing is welded onto the end cover, and the other end surface of the bushing is connected with the tail cover in a welding way. Compared with the prior art, the bolt protecting device is connected with the screw to be protected in a threading way, so the bolt protecting device has a simple structure, is convenient to install and disassemble, is difficult to drop, has good exchangeability and long service life, can effectively prevent the corrosive medium from corroding the threads of the bolt, can protect the bolt, and can prevent the mistake operation of human or machines from damaging the threads of the bolt. The bolt protecting device is particularly suitable for protecting the bolt which is used on a pressure container and a pressure pipeline in a petrochemical device.
Description
Technical field
The utility model relates to a kind of bolt protective gear.
Background technique
In petrochemical plant, large pressurized vessel, pressure piping flange connect used fastening piece and are the screw bolt and nut that material has the super-large diameter of specific (special) requirements, generally need to adopt hydraulic pressure to install, and it is long that bolt exposes outside nut portion.Because chemical product have corrosivity mostly, therefore bolt exposes outside the corrosion of the screw thread corrosion-vulnerable gas of nut portion, also may be subjected to artificial or mechanical damage, make bolt be difficult to dismounting, need to adopt the method for destroying bolt to open flange connecting usually.
For the part of protecting bolt to expose; Chinese patent ZL200920351695.2 has proposed a kind of " new-type bolt protective gear "; it is to be distributed with several new-type bolt protective gears on connecting body; described each new-type bolt protective gear is a shroud protective cap on the bolt head outside the nut end face; in protective cap end face middle part installing bolton mechanism; described bolton mechanism is made up of tap bolt and tightening nut; affixed tightening nut on the actinal surface of the axis hole top of protective cap end face middle part makes the threaded end of tap bolt pass tightening nut and is threaded in the bolt head.This bolt protective gear structure is complicated, and part is more, and bolt is had damage, and poorly sealed close between bolt protective gear and tightening nut simultaneously, double thread does not partly have good protective action.
Chinese patent ZL200920029993.X has proposed " a kind of bolt protecting jacket "; it is characterized in that it is that the cavity that the body by tubular structure forms is constituted; described bolt protecting jacket comprises the structure that the body outer wall is provided with increases the frictional force function; cavity is boss shape structure for what be complementary with the exposed dimensional structure of bolt; the body inwall on its convex shoulder top is provided with locking mechanism, and the body inwall of convex shoulder bottom is provided with position structure voluntarily.This bolt protecting jacket has taken the circumferential space of flange bolt circle, causes pitch of bolts to increase, and is unfavorable for the layout of bolt.This bolt protecting jacket shape is complicated, adopt nonmetallic material to make, so this kind bolt protecting jacket is not suitable for high-temperature operation operating mode in the petrochemical plant.
Chinese patent ZL 200520082454.4 has proposed a kind of " bolt protective gear ", and it comprises O type elastic ring that is installed between nut and packing ring and the protective cap composition that is enclosed within on the screw rod.Because O type elastic ring has been installed between nut and packing ring; on screw rod, overlapped protective cap; between nut and protective cap, rubber washer is arranged; make the screw flight part no longer be exposed in the atmosphere; can effectively prevent artificial and mechanical deterioration, particularly prevent the corrosion of aqueous vapor, when needs turn nut screw rod; only need take off protective cap, just can turn nut easily and unclamp fastened structural member.This bolt protective gear is installed maintenance inconvenience.When the protective cap of this bolt protective gear adopts inwall not have worm structure,, come off easily in conjunction with insecure; When adopting inwall that worm structure is arranged, the screw thread amount of finish is bigger.This bolt protective gear adopts nonmetallic material to make, so this kind bolt protective gear is not suitable for high-temperature operation operating mode in the petrochemical plant.
Chinese patent ZL 200920009051.5 has proposed a kind of " Bolt-protecting cap ", and this protective cap is a stepped housing hollow, up-small and down-big, comprises lower case that covers at nut and the upper body that is connected in bolt head; The inner stepped circular hole of described upper body and lower case for connecting; The aperture of described lower case is more than or equal to the maximum outside diameter of nut; Described upper body is provided with the internal thread that can screw with bolt; The outside of described upper body is prism-shaped; Described upper body and lower case are integrally moulded by uvioresistant and weather proof.This Bolt-protecting cap has taken the circumferential space of flange bolt circle, causes pitch of bolts to increase, and is unfavorable for the layout of bolt.Poorly sealed close between this Bolt-protecting cap and flange body, double thread does not partly have good protective action.This Bolt-protecting cap adopts nonmetallic material to make, so this kind Bolt-protecting cap is not suitable for high-temperature operation operating mode in the petrochemical plant.
Chinese patent ZL 200820021325.8 has proposed a kind of " bolt safety cover ", and it comprises the end socket that main body cover and main body cover top connect, and described end socket is the semicircle dome head, and the shape of described main body cover, end socket and bolt is suitable.The size of bolt safety cover internal diameter and the size of nut external diameter are complementary.Main body cover internal diameter equals the external diameter of nut or less than 0.3～0.5 millimeter of the external diameter of nut.This bolt safety cover has taken the circumferential space of flange bolt circle, causes pitch of bolts to increase, and is unfavorable for the layout of bolt.This bolt safety cover inwall does not have screw thread, in conjunction with insecure, comes off easily.This bolt safety cover adopts nonmetallic material to make, so this kind bolt safety cover is not suitable for high-temperature operation operating mode in the petrochemical plant.
Chinese patent ZL 200720173855.X has proposed a kind of " bolt protective gear ", it is characterized in that this bolt protective gear comprises nuts and cup packing; The profile of described cup packing is a bowl-type, and its bowl bottom has the through hole that adapts to the bolt shank external diameter, and its outer surface near the bowl upper edge has outside thread; Described nuts is a cap shape hollow structure, and its internal surface near opening is offered the internal thread that matches with the outside thread of described cup packing; Match with the described nuts sealed cavity that forms of described cup packing can hold the exposed parts and the nut of bolt.This bolt protective gear structure is complicated, and part is more, and maintenance inconvenience is installed; This bolt safety cover has also taken the circumferential space of flange bolt circle simultaneously, causes pitch of bolts to increase, and is unfavorable for the layout of bolt.
Summary of the invention
Technical problem to be solved in the utility model is that the present situation at prior art provides a kind of simple in structure, bolt protective gear of not taking installing space and easy accessibility, long service life.
The utility model solves the problems of the technologies described above the technological scheme that is adopted: this bolt protective gear; it is characterized in that comprising the stainless steel closed outer casing that is set on the screw rod to be protected; described outer putting is provided with mounting hole, and the inwall of this mounting hole is provided with and the suitable screw thread of described screw rod to be protected.
Described overcoat comprises end cap, ring set sleeve and the tail-hood on described screw rod; Wherein, described mounting hole is arranged on the described end cap, and an end face of described sleeve is welded on the described end cap, and another end face and the described tail-hood of sleeve are welded to connect.
The cross section of described end cap is square or hexagon, and be screwed onto the big or small suitable of nut on the screw rod.
The largest contours diameter phi 1 of described end cap cross section satisfies following relation with the diameter M of described screw rod:
φ1＝(1.40～1.85)M。
The thickness δ 1 of described end cap and the diameter M of described screw rod satisfy following relation:
δ1＝(0.2～1.0)M。
The cross section of described sleeve is circular, and the diameter of sleeve is a bit larger tham the diameter of described screw rod.
The thickness of described tail-hood is 2mm～4mm, and the thickness of described sleeve is 2mm～4mm.
Compared with prior art; bolt protective gear provided by the utility model connects screw rod to be protected in the mode that is threaded; simple in structure; be convenient to installation and removal, and difficult drop-off, and interchangeability is good; long service life; effectively prevented the corrosion of aggressive medium to bolt silk mouth, the protection bolt has been avoided people or the mechanical misoperation damage to bolt silk mouth.The utility model is specially adapted to the protection of pressurized container in the petrochemical plant, the used bolt of pressure piping.
Description of drawings
Fig. 1 is the utility model embodiment's a longitudinal sectional view;
Fig. 2 is the sectional view along A-A line among Fig. 1;
The longitudinal sectional view of Fig. 3 the utility model embodiment user mode;
Fig. 4 is the sectional view of hexagon end cap.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1 to Figure 3, this bolt protective gear comprises:
The cross section of end cap is square in the present embodiment, also can adopt hexagon as shown in Figure 4, the sizableness of hexagonal size and nut 42.
Tail-hood 3, adopting thickness is the thin-wall stainless steel plate preparation of 3mm, for the suitable circular plate of sleeve 2, tail-hood 3 is welded on another end face of sleeve 2.
During installation, screw rod 41 was revolved screw thread on the mounting hole 11, and fitted tightly together until end cap 1 and nut 42 and get final product.
Claims (7)
1. a bolt protective gear is characterized in that comprising the stainless steel closed outer casing that is set on the screw rod to be protected, and described outer putting is provided with mounting hole, and the inwall of this mounting hole is provided with and the suitable screw thread of described screw rod to be protected.
2. bolt protective gear according to claim 1 is characterized in that described overcoat comprises end cap, ring set sleeve and the tail-hood on described screw rod; Wherein, described mounting hole is arranged on the described end cap, and an end face of described sleeve is welded on the described end cap, and another end face and the described tail-hood of sleeve are welded to connect.
3. bolt protective gear according to claim 2, the cross section that it is characterized in that described end cap is square or hexagon, and be screwed onto the big or small suitable of nut on the screw rod.
4. bolt protective gear according to claim 3 is characterized in that the largest contours diameter phi 1 of described end cap cross section and the diameter M of described screw rod satisfy following relation:
φ1＝(1.40～1.85)M。
5. bolt protective gear according to claim 4 is characterized in that the thickness δ 1 of described end cap and the diameter M of described screw rod satisfy following relation:
δ1＝(0.2～1.0)M。
6. according to the described bolt protective gear of the arbitrary claim of claim 2 to 5, the cross section that it is characterized in that described sleeve is for circular, and the diameter of sleeve is a bit larger tham the diameter of described screw rod.
7. bolt protective gear according to claim 6, the thickness that it is characterized in that described tail-hood is 2mm～4mm, the thickness of described sleeve is 2mm～4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120136642 CN201991912U (en) | 2011-04-26 | 2011-04-26 | Bolt protecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120136642 CN201991912U (en) | 2011-04-26 | 2011-04-26 | Bolt protecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201991912U true CN201991912U (en) | 2011-09-28 |
Family
ID=44668401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120136642 Expired - Lifetime CN201991912U (en) | 2011-04-26 | 2011-04-26 | Bolt protecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201991912U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533926A (en) * | 2015-01-06 | 2015-04-22 | 刘兴丹 | Tightening deformation locking bolt |
| CN112355426A (en) * | 2020-10-28 | 2021-02-12 | 中国航发贵州黎阳航空动力有限公司 | Protective device for nuts with anodized layers in flame brazing process |
-
2011
- 2011-04-26 CN CN 201120136642 patent/CN201991912U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533926A (en) * | 2015-01-06 | 2015-04-22 | 刘兴丹 | Tightening deformation locking bolt |
| CN112355426A (en) * | 2020-10-28 | 2021-02-12 | 中国航发贵州黎阳航空动力有限公司 | Protective device for nuts with anodized layers in flame brazing process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Patentee after: Sinopec Corp. Patentee after: SINOPEC Ningbo Engineering Company Limited Patentee after: SINOPEC Ningbo Technology Research Institute Co., Ltd. Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Patentee before: Sinopec Corp. Patentee before: Sinopec Ningbo Engineering Co., Ltd. Patentee before: Sinopec Ningbo Institute of Technology |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110928 |