CN206309735U - Non-dismountable formula screw - Google Patents
Non-dismountable formula screw Download PDFInfo
- Publication number
- CN206309735U CN206309735U CN201621359971.6U CN201621359971U CN206309735U CN 206309735 U CN206309735 U CN 206309735U CN 201621359971 U CN201621359971 U CN 201621359971U CN 206309735 U CN206309735 U CN 206309735U
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- Prior art keywords
- screw
- block
- dismountable formula
- screw head
- head
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Abstract
This application discloses a kind of non-dismountable formula screw, including screw head and threaded shank, threaded shank has block near the side of screw head, and the coupling part between screw head and block has groove.Screw head is used to coordinate with instrument, and screw is screwed；Block is used for against the part to be installed with through hole, and the coupling part between the screw head and block has groove.Groove is used to facilitate screw to be twisted into two parts herein when by larger torque, so as to the non-dismountable formula for realizing screw is installed.Non-dismountable formula screw can effectively reduce workman to the maloperation through valve and the screw of valve rack, reduce the risk of medium leakage.
Description
Technical field
The utility model is related to a kind of screw, specifically a kind of non-dismountable formula screw.
Background technology
For valve partses such as valve rods, if the medium of valve is high temperature and high pressure steam medium, valve partses may be by
Medium power blows out.Valve be mainly by valve rack it is anti-blow to ensure the parts such as valve rod, valve rack by screw fasten
On valve body.After valve completes assembling, if workman grasps to the screw through valve body and valve rack by mistake
Work will cause the risk that medium is revealed.
Utility model content
The utility model is regarding to the issue above, it is proposed that a kind of non-dismountable formula screw for preventing valve medium from revealing.
The technical scheme that the utility model is taken is as follows：A kind of non-dismountable formula screw, including screw head and screw rod
Portion, threaded shank has block near the side of screw head, and the coupling part between screw head and block has groove.
Screw head is used to coordinate with instrument, and screw is screwed；Block is used for against the part to be installed with through hole, institute
The coupling part stated between screw head and block has groove.Groove is used to facilitate screw when by larger torque herein
Twist into two parts, so as to the non-dismountable formula for realizing screw is installed.Non-dismountable formula screw can effectively reduce workman to through valve
And the maloperation of the screw of valve rack, reduce the risk of medium leakage.
Optionally, screw rod includes unthreaded portion and threaded portion, and unthreaded portion is connected with block, outside threaded portion
Side wall is provided with external screw thread.When screw is mounted on valve rack, inner side unthreaded portion mechanical strength is bigger, can bear
Larger moment of torsion, prevents the loosening of screw.
Optionally, screw head is prismatic structure.Prism coordinates with instrument, is easy to stress.
Optionally, screw head is square structure.Square spigot coordinates with instrument, is easy to more preferable stress.
Optionally, block is ring-type.
Optionally, the length of unthreaded portion is more than threaded portion.
The beneficial effects of the utility model are：Screw head is used to coordinate with instrument, and screw is screwed；Block be used for against
Part to be installed with through hole, the coupling part between the screw head and block has groove.Groove is used to facilitate work
After tool tightens the screws to position, continue to rotate up to that will be twisted into two parts at groove place, so as to the non-dismountable formula for realizing screw is installed.
Non-dismountable formula screw can effectively reduce workman to the maloperation through valve and the screw of valve rack, reduce medium and let out
The risk of dew.
Brief description of the drawings：
Fig. 1 is the stereogram of the non-dismountable formula screw of the utility model；
Fig. 2 is the front view of the non-dismountable formula screw of the utility model.
Each reference is in figure：
1st, screw head；2nd, groove；3rd, block；4th, unthreaded portion；5th, threaded portion.
Specific embodiment：
With reference to each accompanying drawing, the utility model is described in detail.
As shown in Figures 1 and 2：A kind of non-dismountable formula screw, including screw head 1 and threaded shank, threaded shank are close to
The side of screw head 1 has block 3, and the coupling part between screw head 1 and block 3 has groove 2.
Screw head 1 is used to coordinate with instrument, and screw is screwed；Block 3 is used for against the part to be installed with through hole,
Coupling part between the screw head 1 and block 3 has groove 2.Groove 2 is used to facilitate screw when by larger torque
Twisted into two parts herein, so as to the non-dismountable formula for realizing screw is installed.Non-dismountable formula screw can effectively reduce workman to running through
In the maloperation of valve and the screw of valve rack, the risk of medium leakage is reduced.
In the present embodiment, screw rod includes unthreaded portion 4 and threaded portion 5, and unthreaded portion 4 is connected with block 3, spiral shell
The lateral wall of line part 5 is provided with external screw thread.When screw is mounted on valve rack, the mechanical strength of inner side unthreaded portion 4
It is bigger, larger moment of torsion can be born, prevent the loosening of screw.
In the present embodiment, screw head 1 is prismatic structure.Prism coordinates with instrument, is easy to stress.
In the present embodiment, screw head 1 is square structure.Square spigot coordinates with instrument, is easy to stress.
In the present embodiment, block 3 is ring-type.
In the present embodiment, the length of unthreaded portion 4 is more than threaded portion 5.
Preferred embodiment of the present utility model is the foregoing is only, not thereby patent protection of the present utility model is limited
Scope, the equivalent structure transformation that every utilization the utility model specification and accompanying drawing content are made, is directly or indirectly used in it
The technical field of his correlation, is similarly included in protection domain of the present utility model.
Claims (6)
1. a kind of non-dismountable formula screw, it is characterised in that including screw head and threaded shank, the threaded shank is near screw
The side of head has block, and the coupling part between the screw head and block has groove.
2. non-dismountable formula screw as claimed in claim 1, it is characterised in that the screw rod includes unthreaded portion and screw thread
Part, unthreaded portion is connected with the block, and the lateral wall of threaded portion is provided with external screw thread.
3. non-dismountable formula screw as claimed in claim 1, it is characterised in that the screw head is prismatic structure.
4. non-dismountable formula screw as claimed in claim 1, it is characterised in that the screw head is square structure.
5. non-dismountable formula screw as claimed in claim 1, it is characterised in that the block is ring-type.
6. non-dismountable formula screw as claimed in claim 2, it is characterised in that the length of the unthreaded portion is more than screw thread
Part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621359971.6U CN206309735U (en) | 2016-12-12 | 2016-12-12 | Non-dismountable formula screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621359971.6U CN206309735U (en) | 2016-12-12 | 2016-12-12 | Non-dismountable formula screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206309735U true CN206309735U (en) | 2017-07-07 |
Family
ID=59251373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621359971.6U Active CN206309735U (en) | 2016-12-12 | 2016-12-12 | Non-dismountable formula screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206309735U (en) |
-
2016
- 2016-12-12 CN CN201621359971.6U patent/CN206309735U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Bai Xiaodong Inventor after: Mao Wei Inventor after: Wang Hong Inventor after: Cui Fengqi Inventor before: Bai Mao Inventor before: Mao Wei Inventor before: Wang Hong Inventor before: Cui Fengqi |