阅读说明：本技术 一种双向密封快速接头 (Bidirectional sealing quick joint ) 是由 张勤建 王水祥 傅贤新 朱明华 郑佳欢 于 2020-12-14 设计创作，主要内容包括：本发明公开了一种双向密封快速接头,包括外壳、阀芯、伸缩弹簧、滑轴和用于夹紧管件的夹紧机构,阀芯设置在外壳内且与外壳密封滑动连接,阀芯上设有连通阀芯两端的通气通道；伸缩弹簧的一端与阀芯连接,伸缩弹簧的另一端与外壳连接；阀芯一端与夹紧机构的一端接触,外壳上设有用于避让滑轴的避让槽,滑轴的一端与阀芯固定；阀芯靠近夹紧机构的一端设有连接沉孔,连接沉孔内设有内密封垫,夹紧机构远离阀芯的一端设有外密封垫。本发明提供了一种双向密封快速接头,可以实现管件的快速连接,且快速接头在使用时内部处于密封状态,能够用于泄漏检测进行正常的水检也可以在腐蚀性或易浸染的液体中检测或者移动。(The invention discloses a bidirectional sealing quick joint which comprises a shell, a valve core, an expansion spring, a sliding shaft and a clamping mechanism for clamping a pipe fitting, wherein the valve core is arranged in the shell and is in sealing sliding connection with the shell, and a ventilation channel communicated with two ends of the valve core is arranged on the valve core; one end of the telescopic spring is connected with the valve core, and the other end of the telescopic spring is connected with the shell; one end of the valve core is contacted with one end of the clamping mechanism, an avoiding groove for avoiding the sliding shaft is arranged on the shell, and one end of the sliding shaft is fixed with the valve core; one end of the valve core close to the clamping mechanism is provided with a connecting counter bore, an inner sealing gasket is arranged in the connecting counter bore, and one end of the clamping mechanism far away from the valve core is provided with an outer sealing gasket. The invention provides a bidirectional sealing quick connector which can realize quick connection of pipe fittings, is internally in a sealing state when in use, can be used for normal water detection in leakage detection and can also be used for detection or movement in corrosive or easily-impregnated liquid.)

1. A bidirectional sealing quick joint is characterized by comprising a shell, a valve core, a telescopic spring, a sliding shaft and a clamping mechanism for clamping a pipe fitting, wherein the valve core is arranged in the shell and is in sealing sliding connection with the shell, and a ventilation channel communicated with two ends of the valve core is arranged on the valve core; one end of the telescopic spring is connected with the valve core, and the other end of the telescopic spring is connected with the shell; one end of the valve core is contacted with one end of the clamping mechanism, an avoiding groove for avoiding the sliding shaft is arranged on the shell, one end of the sliding shaft is fixed with the valve core, and the other end of the sliding shaft penetrates out of the avoiding groove; one end of the valve core close to the clamping mechanism is provided with a connecting counter bore, an inner sealing gasket is arranged in the connecting counter bore, and one end of the clamping mechanism far away from the valve core is provided with an outer sealing gasket.

2. The bi-directional sealing quick connector of claim 1, wherein the inner side walls of the housing adjacent to the sides of the escape slot are provided with sealing rings.

3. The bi-directional sealing quick coupling of claim 1, wherein the end surface of the valve core contacting the clamping mechanism is provided with a sealing ring.

4. The quick joint as claimed in claim 1, 2 or 3, wherein the clamping mechanism comprises a plurality of clamping blocks and a rear clamping sleeve adapted to the clamping blocks; the clamping blocks are circumferentially arranged, the rear clamping sleeve is arranged on the outer side of each clamping block, an outer locking inclined plane is arranged on the outer side of each clamping block, and an inner locking inclined plane matched with the outer locking inclined plane is arranged on the rear clamping sleeve.

5. The bi-directional sealing quick coupling as claimed in claim 4, wherein the clamping mechanism further comprises a front clamping sleeve, two outer locking slopes are oppositely arranged on the outer side wall of the clamping block, an inner locking slope adapted to the outer locking slopes is arranged on the front clamping sleeve, and the front clamping sleeve and the rear clamping sleeve are arranged on opposite sides of the clamping block.

6. The bi-directional sealing quick connector of claim 4, wherein said clamp blocks are provided with spring expansion rings for expanding the clamp blocks outwardly.

7. The quick joint of claim 1, 2 or 3, wherein the clamping mechanism and the extension spring are disposed at opposite ends of the valve core.

8. The bidirectional sealing quick coupling as claimed in claim 1, 2 or 3, wherein the housing is provided with a handle, one end of the handle is hinged to the housing, the handle is provided with a sliding groove, and one end of the sliding shaft is arranged in the sliding groove.

9. The quick connector as claimed in claim 1, 2 or 3, wherein the housing has an end cap, the end cap is screwed to the housing, a sealing ring is disposed between the end cap and the housing, and the clamping mechanism is disposed between the end cap and the housing.

Technical Field

The invention relates to the technical field of connectors, in particular to a bidirectional sealing quick connector.

Background

In actual production, when a pipeline is subjected to leak detection, gas is filled in the pipeline firstly, and then the pipeline is subjected to water detection, but when the detected equipment is not suitable for being contacted with water or the detected equipment needs to enter specific liquid, and the liquid has certain corrosion or is soaked and not easy to clean, the joint can be failed after the common quick joint is used for many times. In a modern factory, some sealing devices need to be painted after passing through water, and a common quick connector cannot be used in paint liquid for a long time, so that workers are required to take the common quick connector off to replace a rubber sleeve sealing pipe fitting which is repelled by the paint liquid after passing through water, manpower resources are wasted, and production efficiency is reduced.

Chinese patent application publication No. CN2361948, published as 2000-02/02, entitled "internal pressure type air and water pipe joint", discloses an internal pressure type air and water pipe joint. The pipe joint is provided with a shell with a taper hole and a through hole, an elastic chuck which is positioned in the through hole of the shell and comprises a cone part matched with the taper hole and can clamp the rubber pipe, a sealing ring positioned in the through hole of the shell and a gasket connected with the sealing ring. The water pipe joint has not yet solved the above-mentioned problems.

Disclosure of Invention

The invention aims to solve the problem that the interior of a quick connector in the prior art is easily corroded and impregnated in corrosive liquid, and provides a bidirectional sealing quick connector which can realize quick connection of pipe fittings, is in a sealing state when used, can be used for normal water detection in leakage detection and can also be used for detection or movement in corrosive or easily impregnated liquid.

In order to achieve the purpose, the invention adopts the following technical scheme:

a bidirectional sealing quick joint comprises a shell, a valve core, an extension spring, a sliding shaft and a clamping mechanism for clamping a pipe fitting, wherein the valve core is arranged in the shell and is in sealing sliding connection with the shell, and a ventilation channel communicated with two ends of the valve core is arranged on the valve core; one end of the telescopic spring is connected with the valve core, and the other end of the telescopic spring is connected with the shell; one end of the valve core is contacted with one end of the clamping mechanism, an avoiding groove for avoiding the sliding shaft is arranged on the shell, one end of the sliding shaft is fixed with the valve core, and the other end of the sliding shaft penetrates out of the avoiding groove; one end of the valve core close to the clamping mechanism is provided with a connecting counter bore, an inner sealing gasket is arranged in the connecting counter bore, and one end of the clamping mechanism far away from the valve core is provided with an outer sealing gasket.

In the technical scheme, the telescopic spring enables the valve core to approach the clamping mechanism through elasticity, the valve core compresses the clamping mechanism, the clamping mechanism is gathered towards the middle and locked, and the pipe fitting cannot be inserted into the quick connector; when detection is needed, the valve core is moved to one end far away from the clamping mechanism through the sliding shaft, the clamping mechanism is not extruded and does not gather to the middle, the pipe fitting can be inserted into the quick connector to abut against the valve core, then the sliding shaft is loosened, the shell moves to one end far away from the pipe fitting under the action of the telescopic spring, the clamping mechanism is extruded by the valve core to gather to the middle to lock and lock the pipe fitting, gas is introduced from the pipe fitting, the gas enters the tail part of the shell through a ventilation channel in the middle of the valve core, high-pressure gas is generated at the tail part of the shell and reacts on the end surface of the valve core, so that the end surface at the other end of the valve core presses the clamping mechanism, the clamping mechanism further clamps the pipe fitting, the end surface presses the inner sealing gasket to realize the sealing of the end surface of the pipe fitting and the end surface of the, the side surface of the pipe fitting is extruded at the head part of the quick connector to realize the isolation of the interior and the exterior of the connector. When the quick coupling immerse liquid, outside liquid is kept apart, inside outside liquid can't get into the joint, has realized the inside cleanness of joint, avoids quick coupling inside to be corroded or pollute, can used repeatedly. Only the shell, the valve core and the sliding shaft need to be subjected to antiseptic treatment.

Preferably, the inner side walls of the shell close to the two sides of the avoiding groove are provided with sealing rings. The sealing ring can enhance the sealing effect and isolate the outside and the inside of the joint. Only partial structures of the shell, the sliding shaft and the valve core of the whole quick joint are in contact with external liquid, and other parts are isolated, so that the inside of the joint is cleaned, and the inside of the quick joint is further prevented from being corroded or polluted.

Preferably, a sealing ring is arranged on the end face of the valve core, which is in contact with the clamping mechanism. The sealing ring can enhance the sealing effect.

Preferably, the clamping mechanism comprises a plurality of clamping blocks and a rear clamping sleeve matched with the clamping blocks; the clamping blocks are circumferentially arranged, the rear clamping sleeve is arranged on the outer side of each clamping block, an outer locking inclined plane is arranged on the outer side of each clamping block, and an inner locking inclined plane matched with the outer locking inclined plane is arranged on the rear clamping sleeve. The structure can realize the clamping function of the clamping mechanism, and convert the axial force borne by the rear clamping sleeve into the clamping force of the clamping block.

Preferably, the clamping mechanism further comprises a front clamping sleeve, two outer locking inclined planes which are oppositely arranged are arranged on the outer side wall of the clamping block, an inner locking inclined plane matched with the outer locking inclined planes is arranged on the front clamping sleeve, and the front clamping sleeve and the rear clamping sleeve are arranged on two opposite sides of the clamping block. The structure can ensure that the stress of the clamping block is symmetrical and the clamping is more stable.

Preferably, the clamping block is provided with a spring expansion ring for expanding the clamping block outwards. The structure can make the clamp splice have the trend of outwards expanding, when not atress, makes the clamp splice expand, is blocked when avoiding the pipe fitting to insert.

Preferably, the clamping mechanism and the extension spring are respectively arranged at two opposite ends of the valve core. The structure facilitates the arrangement of various parts.

Preferably, a spring seat is fixed on the housing, one end of the expansion spring presses the valve core, and the other end of the expansion spring presses the spring seat. The quick connector is characterized in that a spring seat is fixed on the shell and is in threaded connection with the shell, a sealing ring is arranged between the spring seat and the shell, and the quick connector is convenient to install and manufacture.

Preferably, a joint cap is arranged on the spring seat. The connector cap can be replaced by an air inlet connector for inflating the leak detection pipe fitting. The structure facilitates the connection of the quick connector with other structures.

Preferably, the shell is provided with a handle, one end of the handle is hinged with the shell, the handle is provided with a sliding groove, and one end of the sliding shaft is arranged in the sliding groove. The structure can form a lever structure, so that the valve core can be conveniently moved manually, and when the handle rotates, the sliding shaft can slide in the sliding groove and simultaneously drive the valve core to move transversely.

Preferably, the shell is provided with an end cover, the end cover is in threaded connection with the shell, a sealing ring is arranged between the end cover and the shell, and the clamping mechanism is arranged between the end cover and the shell. The structure facilitates installation and manufacture of the quick connector.

The invention has the beneficial effects that: (1) the quick connection of the pipe fittings can be realized; (2) when the quick connector is used, the interior of the quick connector is in a sealed state, and the quick connector can be used for leakage detection and normal water detection and can also be used for detection or movement in corrosive or easily-infected liquid.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

fig. 3 is a schematic structural view of a clamping block in the present invention.

In the figure: the device comprises a shell 1, an avoiding groove 1.1, a spring seat 1.2, a joint cap 1.3, an end cover 1.4, a valve core 2, a ventilation channel 2.1, a connecting counter bore 2.2, a telescopic spring 3, a sliding shaft 4, a clamping mechanism 5, a clamping block 5.1, a rear clamping sleeve 5.2, a front clamping sleeve 5.3, a spring expansion ring 5.4, an outer locking inclined plane 5.5, an inner locking inclined plane 5.6, an inner sealing gasket 6, an outer sealing gasket 7, a sealing ring 8, a handle 9 and a sliding groove 9.1.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments.

Example 1:

as shown in fig. 1, 2 and 3, a bidirectional sealing quick coupling comprises a housing 1, a valve core 2, a telescopic spring 3, a sliding shaft 4 and a clamping mechanism 5 for clamping a pipe fitting, wherein the clamping mechanism 5 comprises a plurality of clamping blocks 5.1, a rear clamping sleeve 5.2 matched with the clamping blocks 5.1 and a front clamping sleeve 5.3 matched with the clamping blocks 5.1; the clamping blocks 5.1 are circumferentially arranged, the clamping blocks 5.1 are provided with spring expansion rings 5.4 which enable the clamping blocks 5.1 to expand outwards, the outer side walls of the clamping blocks 5.1 are provided with two outer locking inclined planes 5.5 which are oppositely arranged, the rear clamping sleeve 5.2 is provided with an inner locking inclined plane 5.6 matched with the outer locking inclined plane 5.5, the front clamping sleeve 5.3 is provided with an inner locking inclined plane 5.6 matched with the outer locking inclined plane 5.5, and the front clamping sleeve 5.3 and the rear clamping sleeve 5.2 are arranged on two opposite sides of the clamping block. A spring seat 1.2 and an end cover 1.4 are fixed on the shell 1, and a joint cap 1.3 is arranged on the spring seat 1.2; the spring seat 1.2 is in threaded connection with the shell 1, a sealing ring 8 is arranged between the spring seat 1.2 and the shell 1, the end cover 1.4 is in threaded connection with the shell 1, the sealing ring 8 is arranged between the end cover 1.4 and the shell 1, and the clamping mechanism 5 is arranged between the end cover 1.4 and the shell 1; the valve core 2 is arranged in the shell 1 and is in sealed sliding connection with the shell 1, and a ventilation channel 2.1 communicated with two ends of the valve core 2 is arranged on the valve core 2; the clamping mechanism 5 and the extension spring 3 are respectively arranged at two opposite ends of the valve core 2; one end of the telescopic spring 3 compresses the valve core 2, and the other end of the telescopic spring 3 compresses the spring seat 1.2; one end of the valve core 2 is contacted with one end of the clamping mechanism 5, the shell 1 is provided with a handle 9 and an avoiding groove 1.1 for avoiding the sliding shaft 4, one end of the sliding shaft 4 is fixed with the valve core 2, and the other end of the sliding shaft 4 penetrates out of the avoiding groove 1.1; one end of the handle 9 is hinged with the shell 1, a sliding groove 9.1 is arranged on the handle 9, and one end of the sliding shaft 4 is arranged in the sliding groove 9.1. One end of the valve core 2 close to the clamping mechanism 5 is provided with a connecting counter bore 2.2, an inner sealing gasket 6 is arranged in the connecting counter bore 2.2, and one end of the clamping mechanism 5 far away from the valve core 2 is provided with an outer sealing gasket 7. The inner side walls of the two sides of the shell 1 close to the avoidance groove 1.1 are provided with sealing rings 8; and a sealing ring 8 is arranged on the end surface of the valve core 2 contacted with the clamping mechanism 5.

In the technical scheme, the telescopic spring 3 enables the valve core 2 to approach the clamping mechanism 5 through elasticity, the valve core 2 compresses the clamping mechanism 5, the clamping mechanism 5 is gathered towards the middle and locked, and a pipe fitting cannot be inserted into the quick connector; when detection is needed, the valve core 2 is moved to one end far away from the clamping mechanism 5 through the sliding shaft 4, the clamping mechanism 5 is not extruded and does not gather to the middle, the pipe fitting can be inserted into the quick connector to abut against the valve core 2, then the sliding shaft 4 is loosened, the shell 1 moves to one end far away from the pipe fitting under the action of the expansion spring 3, the clamping mechanism 5 is extruded by the valve core 2, the rear clamping sleeve 5.2 and the front clamping sleeve 5.3 are close to each other to extrude the clamping block 5.1 inwards, the clamping block 5.1 gathers to the middle to lock and lock the pipe fitting, gas is introduced from the pipe fitting, the gas enters the tail part of the shell 1 through the ventilation channel 2.1 in the middle of the valve core 2, high-pressure gas is generated at the tail part of the shell 1 and reacts on the end surface of the valve core 2, so that the clamping mechanism 5 is pressed by the end surface of the valve core 2, the clamping mechanism 5 further clamps the pipe fitting, and, simultaneously, the clamping mechanism 5 extrudes the outer sealing gasket 7 under the action of axial force, and because the two ends of the outer sealing gasket 7 are constrained and can only deform towards the middle, the side surface of the head part of the quick joint, which extrudes the pipe fitting, realizes the separation of the inside and the outside of the joint. When the quick coupling immerse liquid, outside liquid is kept apart, inside outside liquid can't get into the joint, has realized the inside cleanness of joint, avoids quick coupling inside to be corroded or pollute, can used repeatedly. Only the shell 1, the valve core 2 and the sliding shaft 4 need to be subjected to anti-corrosion treatment.

The invention has the beneficial effects that: (1) the quick connection of the pipe fittings can be realized; (2) when the quick connector is used, the interior of the quick connector is in a sealed state, and the quick connector can be used for leakage detection and normal water detection and can also be used for detection or movement in corrosive or easily-infected liquid.