CN203254323U

CN203254323U - Clamping device for internal thread pipe fitting

Info

Publication number: CN203254323U
Application number: CN 201320245351
Authority: CN
Inventors: 洪培英; 李绍鑫
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-05-08
Filing date: 2013-05-08
Publication date: 2013-10-30
Anticipated expiration: 2023-05-08

Abstract

The utility model discloses a clamping device for an internal thread pipe fitting. The clamping device for the internal thread pipe fitting comprises a core tube, an outer sleeve, multiple claws and an ejector tube, the core tube is sleeved with the outer sleeve, and the ejector tube is arranged on an outlet end of the core tube in the mode that the ejector tube can move along the axis of the core tube. The multiple claws are arranged on the end portion of the jacket around the outer wall of the ejector tube, threads are formed in the outer walls of the multiple claw unfolding springs capable of enabling the multiple claws to be unfolded are arranged on the outer walls of the multiple claws, sealed contact is formed between the inner wall of the outer sleeve and the outer wall of the ejector tube, a gasket seat is arranged on the outlet end of the core tube in the mode that the gasket seat can slide along the axis of the core tube, the gasket seat is arranged in the ejector tube, and a gasket is arranged in the gasket seat. When the clamping device for the internal teeth pipe fitting is used for testing the thread pipe fitting, due to the fact that the sealed contact is formed between the outer sleeve and the ejector tube, the ejector tube is pushed upwards through an air pump, the multiple claws are unfolded by the ejector tube so as to abut against the inner wall of the tested ejector tube, the gasket seat moves upward to abut against the inner wall of the tested pipe fitting. When the tested pipe fitting is disassembled, the ejector tube is pushed downwards through the air pump, the multiple claws are loosened, and the tested pipe fitting is disassembled. Therefore, assembly operation and disassembly operation are fast and convenient, and the accuracy of a seal test can be improved.

Description

Interior tooth pipe fitting cramping arrangement

Technical field

The utility model relates to a kind of interior tooth pipe fitting cramping arrangement.

Background technology

When existing hot-water heating five metals sanitaryware need to carry out the sealing property test usually after assembling is finished, if the test pipe fitting is riffled tube, usually adopt easy interior tooth pipe fitting cramping arrangement.

This clamping device mainly comprises overcoat, core pipe, three-jaw and push pipe.Overcoat is cannula-like, and the core pipe is set in the overcoat, and the core pipe has entrance point and the port of export, and three-jaw is installed in the end of overcoat, and the outer wall of three-jaw is provided with screw thread.The end of core pipe is provided for strutting the push pipe of three-jaw.

During the internal thread tube piece of clamping test usefulness, at first, the end of overcoat is against on the test pipe fitting, the tester upwards promotes push pipe, struts three-jaw three-jaw is against on the test pipe fitting inner wall.Then, the entrance point by the core pipe passes into gas or liquid carries out the sealing property test to the test pipe fitting.During dismounting, the tester promotes push pipe downwards, and three-jaw unclamps homing and clamping device can be removed.

This clamping device is clamping, is needing the tester to pass back and forth push pipe when dismantling, and it is very inconvenient to use, and produces easily leakage between the port of export of core pipe and the test pipe fitting, also can have influence on the test result of sealing.

The utility model content

In view of this, the purpose of this utility model is to provide a kind of and can improves the interior tooth pipe fitting cramping arrangement that the convenient performance of clamping test block can improve again the sealing test degree of accuracy.

In order to reach above-mentioned purpose, solution of the present utility model is:

A kind of interior tooth pipe fitting cramping arrangement comprises core pipe, overcoat, multijaw and push pipe, and overcoat is enclosed within on the core pipe, and the core pipe has entrance point and the port of export, in the mode that can move along the axis of core pipe push pipe is set on the port of export of core pipe; The end of overcoat arranges multijaw round the push pipe outer wall, the outer wall of multijaw is provided with screw thread and makes the spring that opens that multijaw opens, form the sealing contact between the inwall of described overcoat and the outer wall of described push pipe, the mode that can slide along the axis of core pipe on the port of export of described core pipe is provided with washer seat, and washer seat is positioned at described push pipe, and pad is housed in the washer seat.

The end of described washer seat forms reducing diameter part, and described pad is set on the reducing diameter part.

On the outer wall of described core pipe along the importer to convexing with successively first step, second step and the 3rd step, the end of described overcoat is connected on the first step, the end of described push pipe is connected on the second step, and the end of described washer seat is connected on the 3rd step.

The outer wall of described push pipe is along the importer to convexing with successively first step, second step and the 3rd step, and first step is connected on the described second step of described core pipe.

The described second step of described push pipe forms sliding sealing with the inwall of described overcoat and contacts, thereby forms the first annular seal space between described overcoat and described core pipe, and described outer putting has the first through hole that is communicated with the first annular seal space; Form the second annular seal space between described push pipe and the described overcoat, described outer putting has the second through hole that is communicated with the second annular seal space.

The end of described washer seat is against on described the 3rd step of described core pipe, have the hole in this 3rd step, the outer wall of described washer seat forms sliding sealing with the inwall of described push pipe and contacts, the inwall of described washer seat forms sliding sealing with the outer wall of described core pipe and contacts, consist of thus the 3rd annular seal space, the 3rd annular seal space has the third through-hole that is communicated with described the first annular seal space.

Described multijaw overcoat has the pawl cover, and the pawl cover is installed in described outer putting.

Described pawl puts and has the pilot hole that the described multijaw of restriction outwards opens respectively.

Described multijaw is three pawls or four pawls.

After adopting said structure, interior tooth pipe fitting cramping arrangement of the present utility model has following beneficial effect: owing to form the sealing contact between the outer wall of the inwall of overcoat and push pipe, by air pump push pipe is moved, it is all very convenient to clamp and dismantle when testing like this, concrete operations are as follows: at first, will test pipe fitting and be enclosed within on the multijaw, and upwards promote push pipe by air pump, multijaw moves up washer seat and is against on the inwall of test pipe fitting opening under the effect of opening spring and being against on the test pipe fitting inner wall.Then, the entrance point by the core pipe passes into gas or liquid carries out the sealing property test to the test pipe fitting.During dismounting, promote push pipe downwards by air pump, multijaw draws under the effect of opening spring and restores and the test pipe fitting can be removed.The utility model makes push pipe and washer seat slide along the axis of core pipe by air pump, and it is very convenient to operate, and the degree of accuracy that can also improve sealing test.

Description of drawings

Fig. 1 is the structural representation of interior tooth pipe fitting cramping arrangement of the present utility model;

Fig. 2 is that multijaw in the utility model is at the schematic diagram that tightens up under the state.

Among the figure:

The specific embodiment

In order further to explain the technical solution of the utility model, the utility model is elaborated below by specific embodiment.

Shown in Fig. 1 to 2, interior tooth pipe fitting cramping arrangement of the present utility model comprises overcoat 1, core pipe 2, multijaw 3, push pipe 4, washer seat 5 and pad 6.

Overcoat 1 is cannula-like, and overcoat 1 is enclosed within outside the core pipe 2.Core pipe 2 has entrance point and the port of export, and the end of overcoat 1 arranges multijaw 3 round the port of export of core pipe 2, and multijaw 3 has three or four calvus that separate.The outer wall of multijaw 3 is provided with screw thread and opens spring 33, opens spring 33 multijaw 3 is outwards opened.Push pipe 4 is enclosed within the port of export place of core pipe 2, and push pipe 4 can move along the axis of core pipe.The port of export of core pipe 2 arranges washer seat 5 in the mode that can slide along the axis of core pipe, and pad 6 is housed in the washer seat 5.

As a preferred embodiment of the present utility model, on the outer tube wall of core pipe 2 along the importer to convexing with successively first step 21, second step 22 and the 3rd step 23.Overcoat 1 is enclosed within outside the core pipe, and the end of overcoat 1 is against on the first step 21.Push pipe 4 is enclosed within on the core pipe 2, and the end of push pipe 4 is against on the second step 22.Washer seat 5 is on core pipe 2, and the end of washer seat 5 is against on the 3rd step 23.

Outwardly first step 41, second step 42 and the 3rd step 43 of forming successively of the outer wall of push pipe 4.First step 41 is against on the second step 22 of core pipe 2.Second step 42 forms sliding sealing with the inwall of overcoat 1 and contacts, thereby forms the first annular seal space 11 and the second annular seal space 12 between push pipe 4 and overcoat 1, and the 3rd step 43 is positioned at the second annular seal space 12.Be respectively equipped with sealing ring between first step 41, second step 42 and the 3rd step 43.Have corresponding the first through hole 11a and the second through hole 12a that is communicated with the first annular seal space 11 and the second annular seal space 12 on the overcoat 1.

Washer seat 5 is enclosed within on the core pipe 2, the end of washer seat 5 is against on the 3rd step 23 of core pipe 2, have the hole in the 3rd step 23 of core pipe 2, the outer wall of washer seat 5 forms sliding sealing with the inwall of push pipe 4 and contacts, the inwall of washer seat 5 forms sliding sealing with the outer wall of core pipe 2 and contacts, consist of thus the 3rd annular seal space 24, the three annular seal spaces 24 and have the third through-hole 24a that is communicated with the first annular seal space 11.

As another preferred embodiment of the present utility model, the end of washer seat 5 forms reducing diameter part 51, and pad 6 is set on the reducing diameter part 51.Multijaw 3 overcoats have pawl cover 31, and pawl cover 31 is installed on the overcoat 1.One end of multijaw 3 is the work end, this work end projected claw cover 31 is outer with clamping test spare, and the other end outward of multijaw 3 forms flanging, and this flanging stretches in the pilot hole 32 of offering on the pawl cover 31, multijaw 3 can outwards open along pilot hole 32 under the effect of opening spring 33.

When adopting the utility model clamping internal thread tube piece to carry out the sealing property test, at first, will test pipe fitting and be enclosed within on the multijaw 3, the first through hole 13a and the second through hole 14a are communicated with air pump by tracheae respectively.By the first through hole 11a the first annular seal space 11 is ventilated, gas enters the first annular seal space 11, promote push pipe 4 and move up, multijaw 3 outwards opens along pilot hole 32 under the effect of opening spring 33, and multijaw 3 just tightly is against on the internal thread tube wall of test pipe fitting.

Because push pipe 4 moves up and has opened third through-hole 24a, gas in the first annular seal space 11 enters the 3rd annular seal space 24 by third through-hole 24a, and promotion washer seat 5 moves up, pad 6 tightly is attached on the inwall of test pipe fitting, contacts thereby make form to seal between interior tooth pipe fitting cramping arrangement and the test pipe fitting.

At last, pipe fitting passes into gas or liquid carries out the sealing property test to testing by core pipe 2.During dismounting, by the second through hole 12a the second annular seal space 12 is inflated, gas push push pipe 4 moves down, behind the air venting in the 3rd annular seal space 24, washer seat 5 falls after rise downwards under the effect of push pipe 4, multijaw 3 retract to be thrown off the test pipe fitting along pilot hole 32 to the centre under the effect of spring 33, the test pipe fitting can be removed from interior tooth pipe fitting cramping arrangement like this.

The utility model simple operation only needs once inflation can make core pipe 2 and washer seat 5 along the axis quick sliding of core pipe 2, and charge and discharge operations is very convenient, laborsaving.

The above and accompanying drawing only are the utility model preferred embodiment, so can not limit with this scope of product form of the present utility model and style and enforcement, any suitable variation or equivalence variation or modification of doing according to the utility model claim and specification all should be considered as not breaking away from patent category of the present utility model.

Claims

1. tooth pipe fitting cramping arrangement in a kind comprises core pipe, overcoat, multijaw and push pipe, and overcoat is enclosed within on the core pipe, and the core pipe has entrance point and the port of export, in the mode that can move along the axis of core pipe push pipe is set on the port of export of core pipe; The end of overcoat arranges multijaw round the push pipe outer wall, the outer wall of multijaw is provided with screw thread and makes the spring that opens that multijaw opens, it is characterized in that: form the sealing contact between the inwall of described overcoat and the outer wall of described push pipe, the mode that can slide along the axis of core pipe on the port of export of described core pipe is provided with washer seat, and washer seat is positioned at described push pipe, and pad is housed in the washer seat.

2. interior tooth pipe fitting cramping arrangement as claimed in claim 1 is characterized in that: the end of described washer seat forms reducing diameter part, and described pad is set on the reducing diameter part.

3. interior tooth pipe fitting cramping arrangement as claimed in claim 1, it is characterized in that: on the outer wall of described core pipe along the importer to convexing with successively first step, second step and the 3rd step, the end of described overcoat is connected on the first step, the end of described push pipe is connected on the second step, and the end of described washer seat is connected on the 3rd step.

4. interior tooth pipe fitting cramping arrangement as claimed in claim 3, it is characterized in that: the outer wall of described push pipe is along the importer to convexing with successively first step, second step and the 3rd step, and first step is connected on the described second step of described core pipe.

5. interior tooth pipe fitting cramping arrangement as claimed in claim 4, it is characterized in that: the described second step of described push pipe forms sliding sealing with the inwall of described overcoat and contacts, thereby form the first annular seal space between described overcoat and described core pipe, described outer putting has the first through hole that is communicated with the first annular seal space; Form the second annular seal space between described push pipe and the described overcoat, described outer putting has the second through hole that is communicated with the second annular seal space.

6. interior tooth pipe fitting cramping arrangement as claimed in claim 5, it is characterized in that: the end of described washer seat is against on described the 3rd step of described core pipe, have the hole in this 3rd step, the outer wall of described washer seat forms sliding sealing with the inwall of described push pipe and contacts, the inwall of described washer seat forms sliding sealing with the outer wall of described core pipe and contacts, consist of thus the 3rd annular seal space, the 3rd annular seal space has the third through-hole that is communicated with described the first annular seal space.

7. interior tooth pipe fitting cramping arrangement as claimed in claim 1, it is characterized in that: described multijaw overcoat has the pawl cover, and the pawl cover is installed in described outer putting.

8. interior tooth pipe fitting cramping arrangement as claimed in claim 6 is characterized in that: described pawl puts and has the pilot hole that the described multijaw of restriction outwards opens respectively.

9. interior tooth pipe fitting cramping arrangement as claimed in claim 1, it is characterized in that: described multijaw is three pawls or four pawls.