CN2867055Y

CN2867055Y - Polyethylene pipe electric melting saddle pipe fitting

Info

Publication number: CN2867055Y
Application number: CN 200620100851
Authority: CN
Inventors: 陈亨斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-01-27
Filing date: 2006-01-27
Publication date: 2007-02-07
Anticipated expiration: 2016-01-27

Abstract

The utility model relates to a polyethylene pipe electric-melting saddle-shaped plugging tube and the plugging body is a step cylinder. The step cylinder is provided with a ring groove to locate a sealing ring in the outer wall. The step cylinder is provided with two semi-circle ring clamp controlled by springs to fold and unfold. The plugging body is provided with a cavity inside and the plugging portion located in the semi-circle clamp is connected with the cavity. The cavity is provided with a movable briquette inside and the movable briquette is provided with an orbit groove. The movable briquette is pushed and get through the clamp of the plugging body to fit in the orbit groove. A spring is arranged between the movable briquette and the inner bottom wall of the plugging body. A valve structure is arranged between the bottom of the plugging body and the cavity. The plugging tube adopting the above structure can open a round hole of 50-150mm with special perforating device. The specially-structured plugging body can effectively prevent gas leakage and increase reliability. Because the valve structure of the plugging body can balance upward and downward pressure of the plugging body, the lower plugging body is low-pressure and operations are easy.

Description

Polyethylene pipe electric smelting saddle type shutoff pipe fitting

Technical field:

The utility model belongs to polyethylene pipe shutoff pipeline connecting device, particularly the shutoff pipe fitting of polyethylene pipe electric smelting saddle type.Be widely used in combustion gas, oil pipe network system.

Background technique:

In the past gas ductwork construction, under the situation of operation of ventilating, carry out that pipe network is relocated, wiring or increase, replacing valve.Owing to be the operation of band gas, requirement on free again, and relate to user's air feed, through step-down construction commonly used, or adopt the pipeline card is flat, in the middle of two card flat tube roads, relocate, wiring or increase, replacing valve, this kind mode is actual to be the mode operation of blocking source of the gas, above method implements operating difficulties, is subjected to man's activity bigger, and easily causes poisoning, burning and explosive incident.

Patent documentation discloses a kind of polyethylene saddle type pipe fitting, and (patent No. is: 01261197.2), above-mentioned saddle type pipe fitting is installed on the ventilation tubing, by cooperating with special drilling tool, can realizes not stopping transportation pipe network reconfiguration line.Because boring cutter and saddle type body seal in the above-mentioned saddle type pipe fitting upper saddle seat are unsatisfactory, occur gas during perforate easily and leak outside; The boring cutter of staying in the upper saddle seat after operation is finished plays ponding, also has the gas phenomenon that leaks outside, poor reliability.In addition, owing to reasons such as built-in boring cutter spatial constraints and sealabilities, can only open the hole less than 50 millimeters of , the amount of feed of boring cutter is at 3-4mm, and is harder during perforate, easily screw thread made a mess of, and firm fusion face is had certain destructiveness.

The model utility content:

The technical problem of the used solution of the utility model provides good seal performance, operation is more convenient, Security good, again can wide-bore the polyethylene pipe electric smelting saddle type shutoff pipe fitting in footpath.

The utility model comprises the upper saddle seat and the following saddle of mutual obvolvent, be provided with obstruction in the upper saddle seat, the upper saddle seat inwall has and stops up the annular slot that cooperates, the stifled body that stops up is the step cylinder that the cross section is " protruding " font, the step cylindrical outer wall has the annular groove of ccontaining seal ring, two semi-round ring shape clamps being controlled pincerlike opening and closing by spring are housed on the step cylndrical surface, stifled body inside has cavity, the stifled body region and the cavity that are positioned at semicircle clamp waist connect, has valve arrangement between stifled body bottom and the cavity, the movable holddown that control valve opens and closes is housed in the cavity, and the end cap that has circular hole is stamped in stifled body upper end.The step surface of stifled body has restraining groove.

Above-mentioned valve arrangement is that stifled body bottom has axial hole, is penetrated with valve rod in the through hole, and valve rod top is connected with movable holddown, and the bottom hoop has seal ring, and valve rod lacks the cylinder of shape for circle in cross section, top, seal ring position.

Above-mentioned movable holddown bottom has the circular hole chamber, and the valve rod that the upper end has a pin-and-hole stretches into this circular hole chamber and is connected with the briquetting pivot pin.Movable holddown is " Qian " shape, and its outer wall is opened rail groove, between the diapire spring is housed in this briquetting and the stifled body, and briquetting passes that waist and rail groove are slidingly matched in the clamp of stifled body when pressing down.

Semi-round ring shape clamp one end of above-mentioned pincerlike opening and closing and stifled body flexibly connect, and its end is inboard to contact with outer the spring sheet that is fixed on stifled external wall, the other end hook that is connected.

External diameter after above-mentioned two semi-round ring shape clamps fold is not more than stifled body cylinder external diameter.

The utility model has the advantages that: adopt said structure shutoff pipe fitting, do not use during the stopping transportation operation special-purpose trepanning device can open 50 millimeters to 150 millimeters circular hole, go up pressure balance because the valve arrangement that stops up can make to stop up, can effectively prevent gas leakage, safety reliability strengthens.Following obstruction is very light, operates more convenient.

Description of drawings:

Fig. 1 is the utility model structural drawing diagrammatic sketch.

Fig. 2 is for stopping up plan view.

Fig. 3 is the plan view of Fig. 2.

Fig. 4 is the A-A direction sectional view of Fig. 3.

Fig. 5 is the B-B direction sectional view of Fig. 3.

Fig. 6 is a clamp end sections structure enlarged view.

Embodiment:

With reference to figure 1, the utility model is by upper saddle seat 10, down saddle 12, threaded cap 1, the obstructions that are loaded in the upper saddle seat 10 are formed, upper saddle seat 10 and following saddle 12 have four corresponding through holes, with four bolts 14, packing ring 15, nut 16 and pressing plate 13 saddle type electric smelting shutoff pipe fitting is fastened on the tubing 18 respectively, upper saddle seat 10 is equipped with electric-heating plate 11 with tubing 18 surface of contact and is pre-installed in the tenminal block 6 of both sides.There is the outside thread port upper end by the upper saddle seat 10 of pressure injection-moulded moulding, and threaded cap 1 has internal thread to be threaded with upper saddle seat 10 upper ends.Upper saddle seat 10 inwalls have and stop up the annular slot that cooperates.

Referring to figs. 2 to Fig. 6, stop up and form by stifled body 9, clamp 4, valve arrangement, movable holddown 3 etc.Wherein stifled body 9 is the step cylinder of " protruding " font for the cross section, the step cylindrical outer wall has the annular groove of ccontaining " O " shape seal ring 7, two semi-round ring shape clamps 4 by the pincerlike opening and closing of spring 22 controls are housed on the step cylndrical surface, clamp 4 one ends and stifled body 9 flexibly connect, its end is inboard to contact with outer the spring sheet 22 that is fixed on stifled body 9 outer walls, the other end is fixedlyed connected with hook 21 by screw, and hook 21 is used for the force side of pincerlike condensation.Stifled body 9 inside have cavity 25, and stifled body 9 positions and the cavity 25 that are positioned at semicircle clamp 4 waists connect, and the movable holddown 3 of " Qian " shape is housed in the cavity 25, and movable holddown 3 outer walls are opened rail groove 24.Press down movable holddown 3, the while is two hooks 21 of fastening in opposite directions, and the interior waist of clamp passes stifled body 9 just to carry out making clamp 4 fold in the rail groove 24, and the clamp external diameter after folding is not more than stifled body 9 cylinder external diameters, and obstruction can be easily in upper saddle seat 10 inner chamber activities.Movable holddown 3 bottoms have two inner chambers of placing spring 5, and spring 5 upper end bases are gone into this inner chamber, and the lower end seat is the end in stifled body 9.The end cap 23 that has circular hole is stamped in stifled body 9 upper ends, feeds to the shaft that the movable holddown 3 of " Qian " shape exerts pressure downwards and stretches into.Stifled body 9 step surfaces have restraining groove 27, and hook 21 bottoms are in that to be positioned at restraining groove 27 movable, make two clamps 4 because hook 21 is limited and can not continue outer.

Above-mentioned valve arrangement is that stifled body 9 bottoms have axial hole, valve rod 20 runs through this through hole, movable holddown 3 bottoms have circular hole chamber 26, the valve rod 20 that top has a pin-and-hole stretches into circular hole chamber 26 and is connected with briquetting 3 bearing pins, valve rod 20 bottoms hoop has the seal ring 19 and the through hole of stifled body 9 bottoms to be sealed and matched, and valve rod 20 is made the cross section lacks shape for circle cylinder on top, seal ring 19 position.When movable holddown 3 was pressed down, valve rod 20 seal rings 19 places passed from the through hole of stifled body 9 bottoms, and valve rod 20 positions that circle lacks shape constitute the passage that loses heart, and made the gas in the pipeline 18 let out the top, and pressure balance in the obstruction is stopped up so down and become light.After following obstruction finishes, remove movable holddown 3 is exerted pressure, spring 5 upwards pushes up movable holddown 3 and valve rod 20, and seal ring 19 positions of valve rod 20 reset, with stifled body 9 sealings.

The utility model is embedded into electronic type polyethylene saddle type shutoff pipe fitting and realizes that the catenation principle of new and old pipeline is, insert external power supply by two tenminal blocks 6, read in related data by bar code 17, again by with electric-heating plate 11 that tenminal block 6 links to each other in the electric heating wire heating, the outer surface that makes upper saddle seat 10 and tubing 18 is near near the thawing of being heated of the polyethylene the electric heating wire, increase along with the time, pipe fitting is connected the surface with tubing 18 polyethylene is melting state, polyethylene is converted into the viscosity flow phase by solid phase, reach set time, powered-down, natural cooling, make the polyethylene of thawing be converted into vitreous state, reach high-quality weld bond.After welding is finished, upper saddle seat 10 after the bulge test of shutoff equipment is qualified, is carried out perforate and shutoff operation, welding adopts full-automatic microcomputer control to finish, and welding data adopts bar code 17 readings to finish, and has reduced the influence of external environment, eliminate personal factor, thereby guaranteed welding quality.In the welding process, material very long jack-up under the effect of thermal source in the upper saddle seat 10, after welding finished, material overflowed from peep hole 8 surfaces on the upper saddle seat 10, but the convenient construction personnel observe poly melting process with eyes, the right judgement welding quality.

Claims

1, polyethylene pipe electric smelting saddle type shutoff pipe fitting, the upper saddle seat (10) and the following saddle (12) that comprise mutual obvolvent, upper saddle seat is provided with obstruction in (10), upper saddle seat (10) inwall has and stops up the annular slot that cooperates, it is characterized in that the stifled body (9) that stops up is the step cylinder of " protruding " font for the cross section, the step cylindrical outer wall has the annular groove of ccontaining seal ring (7), two semi-round ring shape clamps (4) by the pincerlike opening and closing of spring (22) control are housed on the step cylndrical surface, stifled body (9) inside has cavity (25), stifled body (9) position and the cavity (25) that are positioned at semicircle clamp (4) waist connect, has valve arrangement between stifled body (9) bottom and the cavity (25), the movable holddown (3) that control valve opens and closes is housed in the cavity (25), and the end cap (23) that has circular hole is stamped in stifled body (9) upper end.

2, shutoff pipe fitting according to claim 1, it is characterized in that described valve arrangement is that stifled body (9) bottom has axial hole, be penetrated with valve rod (20) in the through hole, valve rod (20) top is connected with movable holddown (3), the bottom hoop has seal ring (19), and valve rod (20) lacks the cylinder of shape for circle in cross section, seal ring (19) top, position.

3, shutoff pipe fitting according to claim 2 is characterized in that movable holddown (3) bottom has circular hole chamber (26), and the valve rod (20) that the upper end has a pin-and-hole stretches into circular hole chamber (26) and is connected with briquetting (3) pivot pin.

4, shutoff pipe fitting according to claim 1, semi-round ring shape clamp (4) one ends and the stifled body (9) that it is characterized in that described pincerlike opening and closing flexibly connect, its end is inboard to contact with outer the spring sheet (22) that is fixed on stifled body (9) outer wall, the other end hook (21) that is connected.

5, shutoff pipe fitting according to claim 1 is characterized in that stifled body (9) step surface has restraining groove (27).

6,, be characterised in that the external diameter after above-mentioned two semi-round ring shape clamps (4) fold is not more than stifled body (9) cylinder external diameter according to claim 1 or 4 described shutoff pipe fittings.

7, shutoff pipe fitting according to claim 1, it is characterized in that movable holddown (3) is " Qian " shape, its outer wall is opened rail groove (24), between this briquetting (3) and the interior diapire of stifled body (9) spring (5) is housed, briquetting passes stifled body (9) when pressing down interior waist of clamp (4) and rail groove (24) are slidingly matched.