CN2802237Y

CN2802237Y - Adjustable internal expansion type quick clamping head

Info

Publication number: CN2802237Y
Application number: CN 200520102964
Authority: CN
Inventors: 张忠东; 闻长庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-15
Filing date: 2005-06-15
Publication date: 2006-08-02
Anticipated expiration: 2015-06-15

Abstract

The utility model relates to an adjustable internal expansion type quick clamping head. The utility model is composed of a pushing joint which is connected with a self-sealing connection body, a hollow seat which is hermetically nested with the pushing joint, a shim between the pushing joint and the hollow seat, a pressing pipe sleeve which is sheathed with the hollow seat in a sliding fit mode, drawing sheets, a rocker arm assembly which is arranged on the pressing pipe sleeve, multiple thin pressing sheets and sealing rings in interphase arrangement, an internal expansion element which is formed by orderly ranging a single-cone pressing block, an open expansion ring, a double-cone pressing block, an open expansion ring and a single-cone pressing block, a tight expansion force adjusting fitting, etc., wherein the rocker arm assembly causes the pressing pipe sleeve to axially slide relatively to the hollow seat; the thin pressing sheets and the sealing rings are arranged in the hollow seat to ensure the seal of a pipe fitting; the internal expansion element realizes the tight expansion of the pipe fitting. The utility model has the advantages of easy and rapid operation, better seal performance, better expanding and fixing reliability, safe use and long service life, and the pipe fitting can not be clamped to damage.

Description

Adjustable Internal Expansion Type Fast Cartridge

Technical field

The utility model relates to a kind of connection chuck, especially Adjustable Internal Expansion Type Fast Cartridge of refrigeration industry equipment.

Background technique

In refrigeration industry equipment, run into its operation that vacuumizes or hunt leak through regular meeting, and products export is a pipe fitting, particularly require height can not crush under the working state on pipe fitting surface again to leak detection pressure height, gas tightness, more need to provide a kind of tensioner pipe fitting fast that satisfies the tightness requirement not crush the connection chuck of pipe fitting again, and the clamping monitoring tap that uses at present to be compression by two cylindrical rubber seal rings realize, its defective is: 1. because its clamping reliability of elasticity effect of rubber, easily eject during high pressure, dangerous; 2. because rubber seal will be born the clamping task, require to be designed to abundant and will satisfy the hardness of requirement of strength, so just reduced its sealability, and the reduction in working life.

Summary of the invention

Goal of the invention of the present utility model is to overcome the defective of prior art and provides a kind of safe in utilization, good airproof performance, long service life can not crush the Adjustable Internal Expansion Type Fast Cartridge of pipe fitting.

Goal of the invention of the present utility model realizes by following technical proposal: a kind of Adjustable Internal Expansion Type Fast Cartridge, it comprises the joint that pushes away that connects the selfsealings connecting body, this pushes away joint and the load of hollow seat stuffing box gland connects, it is characterized in that described hollow seat is provided with sliding pressure pipe cover of joining outward and leads sheet with the both sides that are connected on it with riveting pin, the other end that leads sheet has circular hole, pressure pipe puts and is provided with rocker arm assembly and the connected adjusting double-screw bolt that makes its relative hollow seat axial slip, in hollow seat, be provided with spacing multiple tracks thin compressing tablet and the seal ring alternately of the adjustable interior shoulder of sealing, also be provided with the hollow draw-bar that connects the stud bolt formula that pushes away joint, rod outer sleeve is equipped with the internal expanding element and the expanding force adjusting element of internal expanding pipe fitting.

Described rocker arm assembly comprises that the obvolvent both sides lead the rocking arm of sheet, and two inboards of rocking arm obvolvent place are provided with the disk of riveted joint, and this disk activity is matched with in the circular hole that leads sheet, and passes the rocking arm hole and the disk eccentric opening is connected on the hollow seat with screw.

Described joint and the junction, hollow seat end of pushing away is provided with and led the pad that sheet is passed.

The internal expanding element of described internal expanding pipe fitting comprises that being arranged in order the single awl briquetting, opening piston ring, bipyramid briquetting, opening piston ring, the list that are sleeved on the pull bar from top to bottom bores briquetting, and male cone (strobilus masculinus) matches identical in the end of its single awl briquetting, opening piston ring, bipyramid briquetting.

Described expanding force adjusting element is the short nut of spinning on pull bar, regulates the back and is locked by long nut.

Sealing adjusting in the described hollow seat is realized by the adjusting double-screw bolt, regulates the back by also cap is also tight.

Compared with prior art, the utility model has adopted the rocker arm assembly that can pull, making pressure pipe overlap relative hollow seat produces axial slip and pushes away joint and drive internal expanding element realization on the hollow draw-bar to pipe fitting internal expanding clamping, thereby pipe fitting is clamped, owing to be provided with multiple-sealed element at the Gu Guanjianchu that rises,, also have good sealing and reliability so this chuck is not only easy and simple to handle, quick, safe in utilizationly do not crush pipe fitting, and long service life.

Description of drawings

Fig. 1 is the utility model sectional structure schematic representation.

Fig. 2 is the side view of Fig. 1.

Fig. 3 is the rocker arm assembly shape assumption diagram.

Fig. 4 looks partial sectional view for the left side of Fig. 3.

Fig. 5 is the F-F sectional view of Fig. 4.

Embodiment

Embodiment is described in detail the utility model again below in conjunction with accompanying drawing.

Shown in Fig. 1～2, Adjustable Internal Expansion Type Fast Cartridge is used for the connection chuck that chiller plant vacuumizes or hunts leak, and is applicable to that products export is the connection of pipe fitting.It has one to push away joint 14, the threaded end that pushes away joint is to connect selfsealings connecting body 20, the selfsealings connecting body is to connect source of the gas, the other end and hollow seat 12 connect by the 13 stuffing box gland loads of " O " RunddichtringO, are simultaneously pushing away joint and junction, hollow seat end is provided with discoid pad 15, this pad can with push away joint and make whole, be illustrated as split type, can save material, and this pad needs through heat treatment raising hardness, so that bearing thrust.

Hollow seat 12 is outer to be provided with the pressure pipe cover 7 that relative hollow seat cunning is joined, and pressure pipe puts and is provided with by the adjusting double-screw bolt 3 that lead sheet 18 and be threaded of riveting pin 19 riveted joints on it.Lead sheet 18 and be the sheet parts of big little and two rounding, lead sheet microcephaly's rivet hole riveted joint riveting pin, corresponding on hollow seat the axially long darker heavy hole of processing, when guaranteeing that pressure pipe is overlapped axial slippage, riveting pin can not produce with hollow seat draw together wiping.Leading the sheet major part has a circular hole, in order to connect rocker arm assembly.

Described rocker arm assembly (seeing Fig. 3～5) is an operation piece of realizing pressure pipe cover 7 relative hollow seat 12 axial slips, it comprises the rocking arm 16 of obvolvent outside sheet 18 is led in both sides; there is disk 21 two inboards of rocking arm obvolvent place by two rivets 22 riveted joint; this disk activity is matched with in the circular hole that leads sheet; and pass rocking arm hole 23 and disk eccentric opening 24 is connected on the hollow seat 12 with screw 17; because the off-centre of disk relation; when rocking arm is pulled downwards; eccentric disk drives pressure pipe cover 7 and regulates upwards axial slip of double-screw bolt 3 by leading sheet; lead sheet simultaneously again pushing tow pad 15 through pushing away the upwards pulling of hollow draw-bar 11 that joint 14 drives the stud bolt formulas, thereby make the internal expanding element spreading clamping pipe fitting of internal expansion type; Otherwise when rocking arm makes progress as Fig. 2 state, drive the pressure pipe cover and regulate the downward axial slip of double-screw bolt, pull bar loses to upper pulling force, and pipe fitting is disengaged clamping.By the tensioner of clamp spare whether the axial slip of pressure pipe cover is to realize.Be the sealing after the assurance pipe fitting tensioner, in hollow seat 12, be provided with the spacing multiple tracks of the adjustable interior shoulder of sealing 2 thin

compressing tablets

10 and 3 " O " RunddichtringOs 9 alternately, the good sealing effect of multiple-sealed circle, the adjusting of its sealing realizes by adjusting double-screw bolt 3, regulates the back by also cap 5 is also tight.

The internal expanding element housing of realization pipe fitting internal expanding is contained in and is connected on the stud bolt formula hollow draw-bar 11 that pushes away joint, be aligned in sequence with single awl briquetting 4, opening piston ring 6, bipyramid briquetting 8, opening piston ring 6, single awl briquetting 4 from top to bottom, external taper is suitable in the end of its single awl briquetting, opening piston ring, bipyramid briquetting, and the conical surface matches identical.

The expanding force adjusting element is the short nut 2 of spinning on pull bar, regulates the back by long nut 1 locking.

The pipe fitting that needs tensioner is run in the hollow seat till the shoulder from regulating to be inserted between double-screw bolt and the internal expanding element, and the external sealed of pipe fitting promotes thin compressing tablet of multiple tracks and the realization of " O " RunddichtringO by regulating double-screw bolt.Tensioner realizes by the operation rocker arm assembly in the pipe fitting, usually the conical surface of internal expanding element is not close to identical, be in free state, only pulling rocker arm assembly when downward,, making and lead sheet and promote pad and drive pull bar and move upward through pushing away joint because the off-centre in the center of circle makes the gland pipe axial slip that makes progress, the internal expanding element is drawn close the conical surface mutually and is coincide, the stressed spreading of opening piston ring, thus rise by the pipe fitting internal diameter, and pipe fitting is by tensioner.The design of disk throw of eccentric also must reach requirement by the adjusting of short nut in the rocker arm assembly because the pipe fitting clamping is an internal expansion type, so can not crush pipe fitting, source of the gas also successfully from hollow draw-bar by reaching the connection purpose.

Claims

1, a kind of Adjustable Internal Expansion Type Fast Cartridge, its comprise connect selfsealings connecting bodys (20) push away joint (14), this pushes away joint and hollow seat (12) stuffing box gland load connects, it is characterized in that described hollow seat is provided with sliding pressure pipe cover (7) of joining outward and leads sheet (18) with the both sides that are connected on it with riveting pin (19), the other end that leads sheet has circular hole, pressure pipe puts and is provided with rocker arm assembly and the connected adjusting double-screw bolt (3) that makes its relative hollow seat axial slip, in hollow seat, be provided with the spacing multiple tracks of the adjustable interior shoulder of sealing thin compressing tablet (10) and seal ring (9) alternately, also be provided with the hollow draw-bar (11) that connects the stud bolt formula that pushes away joint, rod outer sleeve is equipped with the internal expanding element and the expanding force adjusting element of internal expanding pipe fitting.

2, Adjustable Internal Expansion Type Fast Cartridge according to claim 1, it is characterized in that described rocker arm assembly comprises that the obvolvent both sides lead the rocking arm of sheet (18) (16); two inboards of rocking arm obvolvent place are provided with the disk (21) of riveted joint; this disk activity is matched with in the circular hole that leads sheet (18), and pass rocking arm hole (23) and disk eccentric opening (24) is connected on the hollow seat (12) with screw (17).

3, Adjustable Internal Expansion Type Fast Cartridge according to claim 1 and 2 is characterized in that the described joint (14) that pushes away is provided with the pad (15) that is led the sheet passing with hollow seat (12) junction, end.

4, Adjustable Internal Expansion Type Fast Cartridge according to claim 1, the internal expanding element that it is characterized in that described internal expanding pipe fitting comprises that being arranged in order the single awl briquetting (14), opening piston ring (6), bipyramid briquetting (8), opening piston ring (6), the list that are sleeved on the pull bar (11) from top to bottom bores briquetting (4), and male cone (strobilus masculinus) matches identical in the end of its single awl briquetting, opening piston ring, bipyramid briquetting.

5, Adjustable Internal Expansion Type Fast Cartridge according to claim 1 is characterized in that described expanding force adjusting element is the short nut (2) of spinning on pull bar (11), regulates the back and is locked by long nut (1).

6, Adjustable Internal Expansion Type Fast Cartridge according to claim 1 is characterized in that the sealing adjusting in the described hollow seat (12) is realized by adjusting double-screw bolt (3), regulates the back by also cap (5) is also tight.