CN201992228U - Fire-resistant hydraulic oil pipe joint - Google Patents
Fire-resistant hydraulic oil pipe joint Download PDFInfo
- Publication number
- CN201992228U CN201992228U CN201120032653XU CN201120032653U CN201992228U CN 201992228 U CN201992228 U CN 201992228U CN 201120032653X U CN201120032653X U CN 201120032653XU CN 201120032653 U CN201120032653 U CN 201120032653U CN 201992228 U CN201992228 U CN 201992228U
- Authority
- CN
- China
- Prior art keywords
- oil pipe
- core
- card
- hydraulic oil
- fire
- 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 - Fee Related
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Abstract
The utility model discloses a fire-resistant hydraulic oil pipe joint, which comprises a nut, a clamping core and a clamping sleeve, wherein an inner step is arranged at one end of an inner hole of the nut, and the clamping core is a cylindrical body with a shaft shoulder at one end; one end of the shaft shoulder of the clamping core is connected onto the inner step of the inner hole of the nut in a clamping way, and the clamping sleeve is a cylindrical body of which one end is connected onto the clamping core; and a cavity for installing an oil pipe is arranged between the other end of the clamping sleeve and the clamping core. The fire-resistant hydraulic oil pipe joint is characterized in that: the clamping sleeve is in sealing interference fit connection with the clamping core. The fire-resistant hydraulic oil pipe joint has greatly enhanced sealing and good fire-resistant performances. Proved by experiments, the oil pipe with the fire-resistant hydraulic oil pipe joint can meet the requirements of classification societies for sealing performance certification standards under the high-temperature combustion situation.
Description
Technical field
The utility model relates to a kind of oil connection, especially a kind of fire safe type hydraulic oil pipe joint.
Background technique
Hydraulic oil pipe generally is the pipeline that is used for machinery and engine liquid pressing system, the rubber flexible oil pipe in the middle of generally comprising and the rigid joint at two ends.This hydraulic oil pipe need link together oil pipe and rigid joint when making.Existing hydraulic oil pipe joint, be generally following structure, comprise nut, the core of the card and cutting ferrule, one end of described nut inner hole is provided with interior step, described the core of the card is the cylinder that an end is provided with the shaft shoulder, the core of the card shaft shoulder at one end be connected on the interior step of nut inner hole, described cutting ferrule is that threaded one end is connected the cylinder on the core of the card, is formed for installing the cavity of oil pipe between the cutting ferrule the other end and the core of the card.This hydraulic oil pipe joint is inserted into the oil pipe termination between the core of the card and the cutting ferrule in use, adopts squeezing unit inwardly to push cutting ferrule then around cutting ferrule, makes between the core of the card and the oil pipe and distortion jam-packed and then realization sealing between oil pipe and the cutting ferrule.This hydraulic oil pipe joint can guarantee sealing effect when using in conventional machinery, but is not suitable for being used for the machinery that some have fire-resistant requirement.
In the standard of Classification society to the rubber hose flame resistance used in the boats and ships certain requirement is arranged but.The hydraulic oil pipe that need use in boats and ships should be tested under 800 ℃ positive and negative 50 ℃ 30 minutes condition of scope internal combustion, makes pressure test after the test and can not occur leaking.Existing rubber hose assembly is found through flame-resistance test, the hydraulic oil pipe of described existing structure, and burning produces leakage easily at the oil connection place after 30 minutes in 800 ℃ of flames under the simulation practical working situation, does not reach Classification society's Valuation Standard.So just the sealability to the hydraulic oil pipe joint has proposed new requirement.How to design a kind of hydraulic oil pipe joint of better tightness, becoming related domain has problem to be solved.
The model utility content
At above-mentioned the deficiencies in the prior art, technical problem to be solved in the utility model is how to design the better fire safe type hydraulic oil pipe of a kind of sealability joint.
In order to solve the problems of the technologies described above, adopted following technological scheme in the utility model:
A kind of fire safe type hydraulic oil pipe joint, comprise nut, the core of the card and cutting ferrule, one end of described nut inner hole is provided with interior step, described the core of the card is the cylinder that an end is provided with the shaft shoulder, the core of the card shaft shoulder at one end be connected on the interior step of nut inner hole, described cutting ferrule is that an end is connected the cylinder on the core of the card, is formed for installing the cavity of oil pipe between the cutting ferrule the other end and the core of the card; Its characteristics are that described cutting ferrule and the core of the card joint are being tightly connected of interference fit.
The claimant studies existing hydraulic oil pipe joint structure, realizes in the existing structure that sealing is because the plastic deformation of cutting ferrule realizes sealing around forcing the oil pipe generation resiliently deformable of rubber material and being close to the core of the card.But when high temperature heats, after being heated, the oil pipe of rubber mass can produce pyroplastic deformation, and then make the stress (being the power that pushes against that elastic strain produces) of withholding of rubber mass oil pipe reduce, tightness between oil pipe and the core of the card reduces, the gap can appear between oil pipe that can cause the joint under the high pressure of oil circuit and the core of the card, fluid can enter into the core of the card front end along the gap between oil pipe and the core of the card and flow out from cutting ferrule and the core of the card screw-thread fit joint, causes leakage of oil, can not satisfy sealing requirements.So in the utility model, cutting ferrule and the core of the card joint are improved, changed screw-thread fit into interference fit, adopt the assembling of the hard fashion of extrusion of machinery, realize being tightly connected between cutting ferrule and the core of the card.Like this, when oil connection is subjected to high temperature,, can not release, so improved sealing and refractory nature greatly from joint between cutting ferrule and the core of the card even the gap of fluid between oil pipe and the core of the card enters into the core of the card front end yet.
As further optimization, described the core of the card outer surface is arranged at intervals with the annular projection that a plurality of cross sections are arc.After optimizing like this, the gap of fluid between oil pipe and the core of the card need climb over the annular projection of setting when entering into the core of the card front end, so strengthened sealing, simultaneously because the annular projection cross section is an arc, can not produce bigger stress and not make oil pipe break, guarantee the intact sealing that promptly improved to a certain extent of oil pipe oil pipe.So can be after optimizing so that sealability further strengthens.
Than prior art, fire safe type hydraulic oil pipe joint sealing performance of the present utility model strengthens greatly, and fire performance is good, through test, uses oil pipe of the present utility model can reach the requirement of Classification society to high-temp combustion situation lower seal performance Valuation Standard.
Description of drawings
Fig. 1 is that employing fire safe type hydraulic oil pipe joint of the present utility model and oil pipe compress the structural representation after being tightly connected.
Embodiment
Below in conjunction with the drawings and specific embodiments structure of the present utility model is described in further detail.
During concrete enforcement, a kind of as shown in Figure 1 fire safe type hydraulic oil pipe joint, comprise nut 1, the core of the card 2 and cutting ferrule 3, one end of described nut 1 endoporus is provided with interior step, described the core of the card 2 is the cylinder that an end is provided with the shaft shoulder 4,4 of the core of the card shaft shoulders at one end are connected on the interior step of nut 1 endoporus, and described cutting ferrule 3 is that an end is connected the cylinder on the core of the card 2, is formed for installing the cavity of oil pipe 5 between cutting ferrule 3 the other ends and the core of the card 2; Described cutting ferrule 3 and the core of the card 2 joint 7 being tightly connected for interference fit.Described the core of the card 2 outer surfaces are arranged at intervals with the annular projection 6 that a plurality of cross sections are arc.
Claims (2)
1. fire safe type hydraulic oil pipe joint, comprise nut, the core of the card and cutting ferrule, one end of described nut inner hole is provided with interior step, described the core of the card is the cylinder that an end is provided with the shaft shoulder, the core of the card shaft shoulder at one end be connected on the interior step of nut inner hole, described cutting ferrule is that an end is connected the cylinder on the core of the card, is formed for installing the cavity of oil pipe between the cutting ferrule the other end and the core of the card; It is characterized in that described cutting ferrule and the core of the card joint are being tightly connected of interference fit.
2. fire safe type hydraulic oil pipe joint as claimed in claim 1 is characterized in that described the core of the card outer surface is arranged at intervals with the annular projection that a plurality of cross sections are arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120032653XU CN201992228U (en) | 2011-01-30 | 2011-01-30 | Fire-resistant hydraulic oil pipe joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120032653XU CN201992228U (en) | 2011-01-30 | 2011-01-30 | Fire-resistant hydraulic oil pipe joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201992228U true CN201992228U (en) | 2011-09-28 |
Family
ID=44668718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120032653XU Expired - Fee Related CN201992228U (en) | 2011-01-30 | 2011-01-30 | Fire-resistant hydraulic oil pipe joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201992228U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110087794A (en) * | 2017-02-14 | 2019-08-02 | 李允善 | Stripping off device for stamping die |
| CN113982506A (en) * | 2021-12-29 | 2022-01-28 | 中国石油大学胜利学院 | Sucker rod elevator for minor repair of wheel rotation flange clamping core and use method |
-
2011
- 2011-01-30 CN CN201120032653XU patent/CN201992228U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110087794A (en) * | 2017-02-14 | 2019-08-02 | 李允善 | Stripping off device for stamping die |
| CN113982506A (en) * | 2021-12-29 | 2022-01-28 | 中国石油大学胜利学院 | Sucker rod elevator for minor repair of wheel rotation flange clamping core and use method |
| CN113982506B (en) * | 2021-12-29 | 2022-03-18 | 中国石油大学胜利学院 | Sucker rod elevator for minor repair of wheel rotation flange clamping core and use method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20140130 |