CN2515670Y

CN2515670Y - Pressure-resisting demolition test clamping device for plastic pipe

Info

Publication number: CN2515670Y
Application number: CN 01276840
Authority: CN
Inventors: 任雨峰; 孙兴元; 高文华
Original assignee: Chengde Jinjian Testing Instrument Co ltd
Current assignee: Chengde Jinjian Testing Instrument Co ltd
Priority date: 2001-12-07
Filing date: 2001-12-07
Publication date: 2002-10-09
Anticipated expiration: 2011-12-07

Abstract

The utility model discloses a fixture for testing the pressure resistant and blasting performances of the plastic tube, comprising a fixture body, a chuck plate and a sealing ring, wherein, the sealing ring is arranged on the surface of the internal circle of the fixture body, and the sealing ring is positioned in axial direction; the positioning method can adopt an opened type or a slot type; when the opened type positioning method is adopted, an O-shaped sealing ring is adopted, and the O-shaped sealing ring is pressed by a pressing coil to make the O-shaped sealing ring matched more tightly with a test tube; but when the slot type positioning method is adopted, a U-shaped sealing ring is chosen, and the inner ring of the sealing ring can be made to be matched with the test tube if the pressure goes through the U-shaped cavity; additionally, the matched surface of the chuck plate and the test tube is saw-tooth shaped; besides, the connection of the fixture body and the chuck plate adopts a locked slot type connecting method. The utility model overcomes the disadvantages that the fixture in the prior art has low pressure, poor sealing effect and troublesome installation and using. Thus, the utility model is an ideal fixture for testing the pressure resistant and blasting performances of the present plastic tube.

Description

Plastic pipe is withstand voltage, the explosion bulge test jig

Technical field:

The utility model relates to that a kind of tubing is withstand voltage, the explosion bulge test jig.

Background technology:

In the prior art, carry out withstand voltage to plastic pipe, the jig of explosion bulge test comprises two anchor clamps, split the two ends of test tube, wherein the anchor clamps of a side are provided with pipe adapter, communicate with test(ing) medium, the anchor clamps of opposite side are provided with vent valve, the anchor clamps at two ends are at sealing means, the connected mode of clamping structure and chuck and clamp body is identical, be that sealing means adopts plough groove type, " O " RunddichtringO is placed in the groove, the internal diameter of O-ring seal is less than the test tube external diameter, test tube passes O-ring seal, by and O-ring seal between extruding force sealing, lock with bolt after clamping test tube with two chuck body that are provided with half garden endoporus simultaneously, and link together with will lock all-in-one-piece chuck and anchor clamps of bolt, after the test tube two ends install anchor clamps, can charge into test(ing) medium carries out withstand voltage, explosion bulge test, above-mentioned jig in use has the following disadvantages, the one, adopt the plough groove type hermetically-sealed construction, seal by the extruding force that forms naturally between O-ring seal and the test tube, limited the raising of test pressure, because improve test pressure, will strengthen extruding force, this can only realize that installing like that to be very difficult by dwindling internal diameter of the seal ring, simultaneously, for the test tube of each size, all need to select for use the O-ring seal of corresponding size, this also makes troubles to use; The 2nd, the surface, interior garden that is formed by the semicircle hole on two chuck body is level and smooth, and the size of the clamping friction force that forms between it and the test tube external diameter is restricted, and has formed restriction to improving test pressure; The 3rd, adopt bolt to connect between chuck and the clamp body, mount and dismount all very inconvenient.

Summary of the invention:

Technical problem to be solved in the utility model one is the sealing means that changes clamp body, makes O-ring seal produce radial deformation by external force, thereby increases the extruding force between O-ring seal and the test tube; The 2nd, the clamping structure of change chuck increases the clamping force between chuck and the test tube; The 3rd, change the connected mode between chuck and the clamp body, make its installation, dismounting more convenient; This novel technical scheme that adopts is as follows, this novel clamp body that comprises, chuck and O-ring seal and trim ring, wherein O-ring seal places in the clamp body, and in axial location, it is characterized in that the surface, garden is provided with the step that plays the role of positioning in the clamp body, the one side of " O " RunddichtringO leans against the step place, another side lean against can axially movable trim ring on, trim ring and clamp body adopt threaded engagement, moving axially by the rotation trim ring of trim ring realizes, chuck is made up of two chuck body that have the semicircle endoporus, and the inside surface of semicircle orifice is a zigzag, after two chuck body and the test tube assembling, leave the slit between two chuck body, behind screw locking, be connected with clamp body again, being connected between chuck and the clamp body adopted the latch hook formula, promptly be provided with latch hook in the outer end of two chuck body, correspondingly, on the face of the outer garden of clamp body, be provided with groove, place groove chuck and clamp body can be fixed as one latch hook; In addition, this novel hermetically-sealed construction can also adopt another kind of mode, promptly establishes a seal groove on the face of garden in clamp body, groove built-in " U " RunddichtringO, the opening of O-ring seal is towards the pressure feed direction, the outer garden face of O-ring seal cooperates with the bottom surface of seal groove, and interior garden face is the conical surface, and its top diameter is less than the test tube external diameter, diameter at butt end is greater than the test tube external diameter, make it promptly have compressibility, make pressure pass through " U " die cavity again O-ring seal is expanded, the extruding force between increasing and the test tube; Compared with prior art, this novel sealing, safe reliability all improve greatly, and corresponding test pressure also is improved, and can satisfy withstand voltage, the explosion bulge test of various plastic pipes, and, be convenient to installation and removal more.

Description of drawings:

Accompanying drawing 1 is the structural representation of one of the utility model embodiment

Accompanying drawing 2 is structural representations of two of the utility model embodiment

Accompanying drawing 3 is chuck front views

Accompanying drawing 4 is chuck left views

Accompanying drawing 5 is the sealed structure charts that adopt " O " RunddichtringO

Accompanying drawing 6 is the sealed structure charts that adopt " U " RunddichtringO

Accompanying drawing 7 is exhaust structure figure

Specific embodiments:

When adopting " O " RunddichtringO 3, the interior garden face of clamp body 2 is set position step 10, the one side of " O " RunddichtringO is close on the step, another side lean against can axially movable trim ring 4 on, trim ring and clamp body adopt threaded engagement, chuck 5 is the chuck body 14 that have the semicircle endoporus by two, 15 form, the inside surface 9 of semicircle orifice is a zigzag, after two chuck body and test tube 6 assemblings, leave slit 19 between two chuck body, after screw 20 lockings, affixed with clamp body again, affixed mode has two kinds, and the one, affixed with bolt 1, the 2nd, adopt the latch hook formula, promptly be provided with latch hook 8 in the outer end of two chuck body, correspondingly, on the face of the outer garden of clamp body, be provided with groove 7, place groove chuck and clamp body can be fixed as one latch hook; In addition, this novel hermetically-sealed construction can also adopt another kind of mode, promptly in clamp body, establish a seal groove 11 on the face of garden, groove built-in " U " RunddichtringO 12, the opening of O-ring seal is towards the pressure feed direction, the outer garden face of O-ring seal cooperates with the bottom surface of seal groove, interior garden face 13 is the conical surface, and its top diameter is less than the test tube external diameter, and diameter at butt end is greater than the test tube external diameter, make it promptly have compressibility, make pressure pass through " U " die cavity again O-ring seal is expanded, the extruding force between increasing and the test tube, simultaneously, the vent valve 17 that is provided with on other end clamp body 16 adopts steel ball 18 sealings, can improve the reliability of sealing.

Claims

1, a kind of plastic pipe is withstand voltage, the explosion bulge test jig, comprise clamp body, chuck and O-ring seal, wherein O-ring seal places in the clamp body, and in axial location, it is characterized in that the surface, garden is provided with the step that plays the role of positioning in the clamp body, the one side of " O " RunddichtringO leans against the step place, another side lean against can axially movable trim ring on, trim ring and clamp body adopt threaded engagement, moving axially by the rotation trim ring of trim ring realizes, chuck is made up of two chuck body that have the semicircle endoporus, and the inside surface of semicircle orifice is a zigzag, after two chuck body and the test tube assembling, leave the slit between two chuck body, behind screw locking, affixed with clamp body again, being connected between chuck and the clamp body adopted the latch hook formula, promptly be provided with latch hook in the outer end of two chuck body, correspondingly, on the face of the outer garden of clamp body, be provided with groove, place groove chuck and clamp body can be fixed as one latch hook;

2, withstand voltage, the explosion bulge test jig of plastic pipe according to claim 1, it is characterized in that in clamp body, establishing on the face of garden a seal groove, groove built-in " U " RunddichtringO, the opening of O-ring seal is towards the pressure feed direction, the outer garden face of O-ring seal cooperates with the bottom surface of seal groove, interior garden face is the conical surface, and its top diameter is less than the test tube external diameter, and diameter at butt end is greater than the test tube external diameter.