CN2864582Y

CN2864582Y - Through diameter gauge for oil pipe detecting

Info

Publication number: CN2864582Y
Application number: CN 200520110514
Authority: CN
Inventors: 刘明利
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-29
Filing date: 2005-06-29
Publication date: 2007-01-31
Anticipated expiration: 2015-06-29

Abstract

The utility model is a drift diameter gauge for a petroleum pipeline inspection is locked by a steel pipe for the steel pipe quality during a propulsion process; just when the gauge is locked and stopped moving, all of the kinetic energy is used in wedging, a gripping force of the wedging is extremely large, the gauge is very difficult to be returned when a wedging happens. The utility model divides the gauge body into two main parts, a gauge cylinder 1 and a core rod 2; the gauge cylinder 1 covers the core rod 2; a inner hole of the gauge cylinder can sliding fit the core rod 2, the two can slide relatively and with enough sliding space; the two terminals of the fitting face of the core rod and the gauge cylinder are provided with the shaft shoulders which is larger than the fitting dimension; a cushion 3 is provided between one shaft shoulder of the core rod 2 and the gauge cylinder 1. When a diameter drifting meets the block, the gauge cylinder stops traveling, the core rod compresses the cushion to moderately stop, the wedging depth is small when the gauge cylinder meets the block; the gauge can return easily. During the return process, the core rod acts first, the energy is store before the core rod impacts the gauge cylinder in a certain speed, the impacting energy can make the drift diameter gauge to return.

Description

A kind of petroleum pipe line detects uses drift diameter gauge

Technical field

Drift diameter gauge be after the petroleum pipe line production or use before a kind of instrument of check, in the patent No. is 99222623.6 patent documentation " the seamless petroleum pipe detects and uses path drifting machine ", related to this technology, but the document is not described to drift diameter gauge.

Background technology

The rule of knowing at present have two kinds, a kind of end that is mounted in push rod, another kind of then be to rely on the pressure of gas that rule are placed in the steel pipe equally to move to piston, its difference only is the difference of type of drive, common ground is the as a whole structures of rule, in case rule invar pipe cause for quality in progradation causes rule to be blocked by steel pipe, in the moment that rule being stuck stops to move, all kinetic energy is used to wedging, its clamping force is very big, advise for push rod, the energy that the conversion of its kinetic energy comprises on the push rod to be stored, though add the in light weight many of rule for the weight of pneumatic rule rule compared with push rod, the speed of the rule of equally moving like piston is fast than push-down usually, and the thrust positive air pressure is but greater than the negative pressure that can suck back, in case the wedge that is hampered extremely is difficult to return.

Summary of the invention

The purpose of this utility model is to solve above-mentioned drift diameter gauge can return more easily after snapping in coil of strip.

In order to solve the difficult problem of returning of rule card, the technical solution that the utility model adopted is: will advise body and decompose established practice tube 1 and 2 two major parts of plug, rule tube 1 is used to measure the latus rectum of steel pipe, its physical dimension meets the API standard code, rule tube 1 is hollow being enclosed within on the plug 2, its endoporus is slidingly matched and can slides relatively with plug 2, on the plug 2 with the axial length of rule tubes 1 external cylindrical surface that cooperates greater than the length that cooperates endoporus on the rule tin 1 with it, all there is the shaft shoulder greater than this fit dimension at the two ends of plug and rule tube mating surface, between shaft shoulder of plug 2 and rule tube 1, buffering 3 is arranged, buffering can be a stage clip, rubber or damper, spring can not pressed to the rule tube on the other end shaft shoulder of plug yet.Spring is in the rear end of rule tube during use, the rule tube stops to advance when meeting with obstruction, the plug compression spring moves forward, when the radial hole on the plug move on to rule tubes outer after air pressure pressure release in the plug, the detecting element sender stops driving (promotion push rod or supply gas) forward, spring was in and did not press and state this moment, the impulse force that inertia produced of plug and push rod is little many more than directly together impacting like this, and the degree of depth of wedging steel pipe is also less thereby the rule tube is hampered, and helps returning.What at first move when returning is plug, and has stored energy before the mandrel axis shoulder grafting touches the rule tube, and is with certain speed bump when the mandrel axis shoulder grafting touches the rule tube.

The advantage that the utility model compared with prior art has is to have solved the problem that stuck difficulty is returned, especially Pneumatic path drifting machine more there is positive effect, this is because pneumatic rule are after snapping in steel pipe, returning the air pressure that is adopted is negative pressure, its maximum differential pressure can not be greater than 1 atmospheric pressure, and its power of returning is limited.Adopt the utility model structure can improve the latus rectum speed of path drifting machine, raise the efficiency.

The technical scheme of the utility model being adopted at accompanying drawing is described further below.

Description of drawings

Fig. 1 hinders figure under the normal travel condition for the structure of the utility model embodiment one not being hampered

Fig. 2 hinders figure under the halted state for the structure of the utility model embodiment one being hampered

Fig. 3 contains the structure graph of damper and spring for the utility model embodiment two

Fig. 4 contains the structure graph that damper does not have spring for the utility model embodiment three

Embodiment

Scheme one structure is applicable to the frame mode that is connected with pressed gas in push-down latus rectum and the latus rectum push rod, ventilation can be used for sweeping water and measurement in the hollow hole, be ejected on the tube wall via the hole on the conical surface 6 under the effect of hollow hole gas at pressure under Fig. 1 state, can purge the water that remains in the pipe clean, rule tube 1 quilt card stops when being hampered, plug continues to advance, make that shift out outside the rule tube 1 in hole 5 on the plug circumference, pressed gas pressure release thus in the hollow hole, after the pressure transducer of pressure chamber records this pressure variation, stop to advance the action of drift diameter gauge, be not hampered finish latus rectum after drift diameter gauge hang outside the pipe, it is outer unobstructed that a rule tubes radial hole 4 shifts out pipe, thereby pressed gas so pressure release detect to finish and advance action in the hollow hole.

Scheme two is applicable to stuffiness push rod or Pneumatic path drifting mode, and rule tubes is hampered when stopping to advance, and plug continues reach, the volume compression of the damping cavity 7 between plug and rule tube, and pressure rises to rise to until pressure gradually only is enough to hinder the plug motion.Though there is not the detection means of scheme one, the effect of damping can reduce the power of clashing into significantly.When oppositely returning, because the effect plug of damping can not reset soon, in the process that it resets, negative pressure is set up gradually, and plug quickens to return until knocking the rule tube because of negative pressure after damping plug withdraws from damping cavity.But the rule tube is hit back the repeated multiple times pressure-vaccum until returning if once fail.

Scheme three is applicable to a kind of backguy Pneumatic path drifting machine (with the separate case application).

Claims

1. a petroleum pipe line detects and uses drift diameter gauge, it is characterized in that: the rule tube of measuring latus rectum is hollow, its endoporus and plug are slidingly matched, the axial length of the external cylindrical surface that cooperates with the rule tube on the plug is greater than the length that cooperates endoporus on the rule tube with it, and all there is the shaft shoulder greater than this fit dimension at the two ends of plug and rule tube mating surface.

2. drift diameter gauge according to claim 1 is characterized in that: between shaft shoulder of plug and rule tube buffering is arranged.

3. drift diameter gauge according to claim 2 is characterized in that: buffering is spring, rubber or damper.

4. drift diameter gauge according to claim 1 is characterized in that: the shaft shoulder can be axle bumper or jump ring or locknut or flange.

5. drift diameter gauge according to claim 1 and 2 is characterized in that: a porose end that leads to wherein in the plug, the other end is a blind hole, and is porose logical with center pit on the diametric(al) of plug.

6. drift diameter gauge according to claim 1 is characterized in that: porose its endoporus that leads on the circumference of rule tube.

7. drift diameter gauge according to claim 1 is characterized in that: rule tubes has at least an end that cone is arranged, and is porose and lead to the endoporus of rule tube on the front end cone of the direction of motion of measuring latus rectum.