CN2430601Y

CN2430601Y - Refractory pressure resistant thermal insulation soft pipe

Info

Publication number: CN2430601Y
Application number: CN 00203787
Authority: CN
Inventors: 郭忠华
Original assignee: KAIYUAN INDUSTRY GENERAL Co HENAN OIL FIELD
Current assignee: KAIYUAN INDUSTRY GENERAL Co HENAN OIL FIELD
Priority date: 2000-03-02
Filing date: 2000-03-02
Publication date: 2001-05-16
Anticipated expiration: 2010-03-02

Abstract

The utility model relates to a fire-resisting pressure-resisting thermal insulation soft pipe, which is mainly used for conveying high pressure liquid in high temperature environment in petroleum, chemical industry and other industries. The soft pipe is mainly composed of a rubber pipe 3 and a joint 1, the rubber pipe 3 is composed of six layers of tissue, and a fitting sleeve 4, a joint core 5 and a steel wire wound reinforced layer 7 are fastened together via mechanical pressing. Owing to the firm combination of the rubber pipe 3 and the joint 1 of the soft pipe, the joint 1 can not drop when transfers high pressure liquid. The joint region and the entire rubber pipe are both provided with excellent fire-resisting heat-insulating property, and the utility model can satisfy the operating condition requirements of transferring high pressure liquid in high temperature high heat environment.

Description

Fire-resistant withstand voltage heat-insulating hose

The utility model relates to a kind of fire-resistant withstand voltage heat-insulating hose, is applicable to that mainly requirement can be used at normal temperatures for a long time in the industries such as oil, chemical industry, again can be when accident the short time bear in the occasion of high temperature and carry highly pressurised liquid.

The steel hard tube line and the flexible pipe that in the oil drilling well control device, used in the past, exist inconvenient bending or crooked pliability deficiency to cause inconvenience is installed, and because it does not have heat-shielding performance, too fast system overpressure even the break accident of causing easily of increasing temperature and pressure when running into high temperature.Existing fastening-pressing type rubber hose assembly can't completely cut off heat and cause joint area to lose efficacy and the sebific duct explosion easily because sebific duct and joints sleeve are exposed during high temperature.And existing refractory heat-insulating hose is many owing to the number of plies, complex structure cost height: and exist joints sleeve to expose problem equally, though flexible pipe part refractory heat-insulating is effective, it is heat insulation that joint part does not have, and also causes joint area to lose efficacy easily.

The purpose of this utility model provides a kind of fire-resistant withstand voltage heat-insulating hose, sebific duct of this flexible pipe itself and sebific duct and joint binding site all have the refractory heat-insulating effect, has good crooked pliability, refractory temperature height, fire resistance period are long, its sebific duct combines with joint area firmly, can bear the conveying of high-pressure liquid.

Technical solution adopted in the utility model is: this flexible pipe mainly is made up of sebific duct and joint.Sebific duct from inside to outside is made up of the layers such as rubber pipe, steel wire winding enhancement layer, rubber layer, thermal-protective coating, close bed and rubber hose sheath of tight contact successively: joint is in the two ends of sebific duct, mainly form by joint core and joints sleeve, the joint core inserts the sebific duct endoporus, the steel wire that joints sleeve inserts sebific duct twines between enhancement layer and the thermal-protective coating, makes the steel wire of joints sleeve, joint core and sebific duct twine enhancement layer by mechanical presses and tightens together.Between the annular boss of sebific duct termination outer surface and joint core, be provided with connection protective cap.

Because the utility model is taked technique scheme, sebific duct and joint twine enhancement layer by the steel wire in the sebific duct and tighten together, in conjunction with firm, being unlikely when bearing the highly pressurised liquid conveying comes off joint, its binding site and whole sebific duct all have good refractory heat-insulating performance, can satisfy the working condition requirement of under the high thermal environment of high temperature high-pressure liquid being carried.

Below in conjunction with accompanying drawing the utility model is further specified.

Fig. 1 is the utility model surface structure schematic representation:

Fig. 2 is the utility model joint area structural representation.

Referring to Fig. 1.This flexible pipe is made up of sebific duct 3, joint 1 and connection protective cap 2.

Referring to Fig. 2.Sebific duct 3 is made of 6 layer tissues of tight contact.Its structure from inside to outside is followed successively by: first layer is a rubber pipe 6, forms with nitrile butadiene rubber or other oil resistant rubber, and thickness is greater than 2 millimeters; The second layer is that steel wire twines enhancement layer 7, in order to fastening 1 and make sebific duct 3 can bear high pressure, requires to have certain crooked pliability, with 2～6 layers of composition of cold group of steel wire winding; The 3rd layer is rubber layer 8, and structure and rubber pipe 6 are similar; The 4th layer is thermal-protective coating 9, is used for isolated external heat and imports internal layer into and play fire-resistant effect, compositions such as available asbestos cloth, alumina silicate; Layer 5 is a close bed 10, forms with nitrile butadiene rubber, and thickness is less than 2 millimeters; Outermost surface is a rubber hose sheath 11, forms with P3 type galvanized metal flexible hose.Close bed 10 and rubber hose sheath 11 shield, and improve sebific duct 3 ageing-resistant performances.For improving its refractory nature, can set up the fireproof paint layer at thermal-

protective coating

9 and 10 of close beds.

Joint 1 is connected in the two ends of sebific duct 3, mainly is made up of joint core 5 and joints sleeve 4 two-part.Joint core 5 middle parts are provided with annular boss, and its inner core inserts sebific duct 3 endoporus, and the inner core appearance has ring groove; The steel wire that joints sleeve 4 inserts sebific duct 3 twines between enhancement layer 7 and the thermal-protective coating 9, and watchband has annular tooth in the joints sleeve 4; By mechanical presses joints sleeve 4, joint core 5 are tightened together with the steel wire winding enhancement layer 7 of sebific duct 3.Connection protective cap 2 is located between sebific duct 3 termination outer surfaces and joint core 5 annular boss.Be threaded on the outer tube of joint 1, be connected with fluid delivery mechanisms.Because at joint area, joints sleeve 4 is outer coated with thermal-protective coating 9 and be inserted in the rubber hose sheath 2, sebific duct 3 ends button has been formed complete refractory heat-insulating hose assembly parts with connection protective cap 2, both can guarantee under normal working temperature, to use for a long time, keep normal working in the time of can guaranteeing accident again in the short time at high temperature.

Sound construction of the present utility model, have good Fire insulation and crooked pliability, can satisfy the usage requirement of oil drilling well control device well, start hydraulic blow out preventer and close the required enough time of well head, the stretching of control disaster in case can provide when the blowout fire takes place.

Below be China National Petroleum Corporation (CNPC) well control device quality supervision and test center to testing result of the present utility model: " with reference to the ANSI/API related standards; under the 21MPa test pressure, use the rock gas torch firing; flame temperature is 1050 ± 50 ℃, 3 minutes joint ne-leakages.Meet standard and usage requirement.”

Claims

1, the utility model relates to a kind of fire-resistant withstand voltage heat-insulating hose, this flexible pipe mainly is made up of sebific duct 3 and joint 1, it is characterized in that sebific duct 3 twines enhancement layer 7, rubber layer 8, thermal-protective coating 9, close bed 10 and rubber hose sheath 11 etc. by the rubber pipe 6 of tight contact, steel wire and forms for 6 layers; Joint 1 is made up of joint core 5 and joints sleeve 4, joint core 5 inserts sebific duct 3 endoporus, the steel wire that joints sleeve 4 inserts sebific duct 3 twines between enhancement layer 7 and the thermal-protective coating 9, by mechanical presses joints sleeve 4, joint core 5 is tightened together with the steel wire winding enhancement layer 7 of sebific duct 3.

2, fire-resistant withstand voltage heat-insulating hose according to claim 1 is characterized in that, is provided with connection protective cap 2 between the annular boss of sebific duct 3 termination outer surfaces and joint core 5.

3, fire-resistant withstand voltage heat-insulating hose according to claim 1 and 2 is characterized in that, the appearance that the joint core 5 of described joint 1 inserts sebific duct 3 endoporus positions has ring groove; The interior watchband that joints sleeve 4 inserts sebific duct 3 internal layer positions has annular tooth.

4, fire-resistant withstand voltage heat-insulating hose according to claim 3 is characterized in that, is provided with the fireproof paint layer between described thermal-protective coating 9 and the close bed 10.

5, fire-resistant withstand voltage heat-insulating hose according to claim 3 is characterized in that, described steel wire twines cold group of steel wire of enhancement layer 7 usefulness and twines 2～6 layers of composition.

6, fire-resistant withstand voltage heat-insulating hose according to claim 5 is characterized in that, described rubber pipe 6 thickness are greater than 2 millimeters, and close bed 10 thickness are less than 2 millimeters.