CN201547444U

CN201547444U - Quick connecting structure of plastic pipe

Info

Publication number: CN201547444U
Application number: CN200920307789XU
Authority: CN
Inventors: 蔡贤通
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-08-11
Filing date: 2009-08-11
Publication date: 2010-08-11
Anticipated expiration: 2019-08-11

Abstract

The utility model relates to a quick connecting structure of a plastic pipe belonging to technical field of machinery. The quick connecting structure of the plastic pipe solves the problems of complex disassembling and poor sealing for connected pipes in the existing quick connecting structure. The quick connecting structure of the plastic pipe comprises a main body of a connecting hole; a guide cap is arranged on the connecting hole; the main body can be clamped with a connected pipe passing through the guide cap; a step is arranged on the inner wall of the connecting hole; the front end of the guide cap and the step on the inner wall of the connecting hole form a ring-shaped groove; a clamp ring and a seal ring are sequentially arranged in the ring-shaped groove in the direction along which the connected pipe is inserted into the main body; the clamp ring is provided with a plurality of clamp claws which are inclined to the internal part of the clamp ring; the clamp claws can clamp the connected pipe; the guide cap is detachably connected with the connecting hole on the main body; when the guide cap is detached from the connecting hole on the main body, the connected pipe and the clamp ring clamped on the connected pipe can be separated from the main body together. The quick connecting structure of the plastic pipe has advantages of good sealing, convenient and rapid disassembling of the connected pipe.

Description

The fast joint structure of plastic pipe

Technical field

The utility model belongs to field of mechanical technique, relates to a kind of fast joint structure of plastic pipe.

Background technique

In the daily life and the equipment of industrial product, often pipe need be connected and dismantles.In order to realize quick operation, people have designed the fast joint structure of various pipe fitting, and some has also applied for patent.

For example, Chinese patent literature discloses a kind of combined type rapid pipe joint [patent No.: ZL200420034737.7] that is applicable to that various plastic pipes connect, it comprises the connecting head body that contains pipeline connection port and seal groove, be contained in the seal ring in the seal groove, one end stretches into the locking card that at least two claws are arranged respectively on its front inner wall in the seal groove, is sleeved on that external week of street corner is attached thereto and front inner wall is close to adjusting fixed block on the anterior periphery of locking card.Its shortcoming is also need rotate set screw nut after pipe inserts to lock, and makes its pipe clamping more complicated, and efficient is lower.In addition, the somebody has invented a kind of novel pipe fast joint structure [patent No.: ZL200820122097.3], it comprises the body with attachment hole, it can with the adapter clamping mutually in inserting attachment hole, have circular groove in the attachment hole, in circular groove, be embedded with the seal ring that can form sealing with the adapter of inserting, be provided with in the outside of seal ring one can with take over the collar of clamping mutually, collar has several towards the inboard claw that tilts of attachment hole, is provided with one in the outside of collar when with its annular socket that claw can be strutted when push the attachment hole inboard.Disassemble from body though solved to take over to be connected to apace to reach on the body, but still there are some problems, the utility model needs special tool that annular socket is pushed so that claw struts to the attachment hole inboard when dismounting is taken over, operate cumbersome, and structure more complicated.

Summary of the invention

The purpose of this utility model is to have the problems referred to above at existing technology, proposed a kind of can making and taken over clamping quickly and easily good the time, its adapter can not use extra special tool just can dismantle quickly and easily and the fast joint structure of the plastic pipe of good airproof performance.

The purpose of this utility model can realize by following technical proposal: the fast joint structure of plastic pipe, comprise body with attachment hole, described attachment hole is provided with guiding cap, described body can with the adapter of passing guiding cap clamping mutually, on the inwall of attachment hole, be provided with step, step on the front end of described guiding cap and the attachment hole inwall forms a circular groove, in circular groove, be provided with snap ring and seal ring successively along taking on the direction of inserting body, have several claws on the described snap ring to the snap ring inner inclination, this claw can block adapter, it is characterized in that: the attachment hole on described guiding cap and the body is for removably connecting, when the attachment hole of guiding cap from body disassembled, described adapter and card snap ring thereon can spin off from body together.

Guiding cap play the guiding role, and makes to take over convenient extending into exactly in the attachment hole of body.The inwall of guiding cap and the inwall of attachment hole are on the same straight line, are provided with step on the inwall of attachment hole, and the step on the front end of guiding cap and the attachment hole inwall has just formed a circular groove like this.When needs will be connected to adapter on the body when taking out, only need and will disassemble the attachment hole of guiding cap from body, take over and card snap ring thereon can spin off from body together.When taking over and after card snap ring thereon spins off, as long as the interspersed past of direction continuation of interting the snap ring in being contained in circular groove by guiding cap in the time of will taking over along original the installation, all pass from snap ring until whole adapter, take over to break away from from snap ring and come this moment.After adapter is separated from snap ring, can again snap ring be packed in the attachment hole, again guiding cap is installed on the attachment hole, snap ring is encapsulated in the circular groove again treating uses next time.

In the fast joint structure of plastic pipe of the above, described guiding cap is threaded with being detachably connected as of attachment hole on the body.

Guiding cap and attachment hole be for being threaded, made things convenient between guiding cap and the attachment hole connection with separate.

In the fast joint structure of plastic pipe of the above, described seal ring is provided with at least one annular groove.

Only be provided with an annular groove on the seal ring in this linkage structure, water or other liquid can enter into the annular groove on the seal ring and fill with the full annular groove by outer surface and the slit of taking between the attachment hole inwall, after filling with the full annular groove and when continuing to enter, the water or other liquid that are in the annular groove can produce certain pressure to the both sides sidewall of annular groove.Annular groove be in take over and the attachment hole inwall between, because of water in the annular groove or liquid make the outer surface that seal ring can butt tube and the inwall of attachment hole that extruding definitely be arranged to the pressure of annular groove both sides sidewall, water or liquid just are not easy to have improved the sealing of whole linkage structure greatly from spilling between the outer surface taken over and the seal ring and between the inwall of attachment hole and the seal ring like this.

In the fast joint structure of plastic pipe of the above, also be provided with the snap ring seat in the described circular groove, described snap ring is contained in the above-mentioned snap ring seat, and its end near guiding cap of this snap ring seat has the retaining edge, and described snap ring is resisted against above-mentioned retaining along last.

The snap ring seat works the snap ring effect of supporting, can make snap ring be not easy to take place deformation in the course of the work, retaining on the snap ring seat is along having avoided snap ring in the course of the work because of the clamping effect that deformation or displacement have reduced butt tube takes place effectively in order to make it be not easy to be shifted to the spacing of snap ring with leaning.

In the fast joint structure of plastic pipe of the above, be provided with support ring between described seal ring and the snap ring, an end of this support ring can support above-mentioned seal ring, and the other end is resisted against on the above-mentioned snap ring.

Support ring can play a supportive role to seal ring, can effectively avoid seal ring in the course of the work deformation to take place and makes the sealing of seal ring reduce greatly.

In the fast joint structure of plastic pipe of the above, the front end of described guiding cap is provided with shoulder block one.

The snap ring seat is resisted against on the shoulder block one of guiding cap front end, and this shoulder block one can prevent that snap ring is because of stressed excessive make snap ring and snap ring seat generation deformation.

In the fast joint structure of plastic pipe of the above, the front end of the step on the described attachment hole inwall is provided with shoulder block two.

Shoulder block two can carry out spacing to the adapter of stretching into attachment hole.

In the fast joint structure of plastic pipe of the above, described snap ring forms for the stainless steel material once-through.

In the fast joint structure of plastic pipe of the above, described snap ring forms for joining before and after two heads on several its U types of U type claw.

In the fast joint structure of plastic pipe of the above, described snap ring forms for several claws are connected on the annular bar, and the thin end of its claw one end is thick, and its a thick end and annular bar is connected.

The shape of snap ring can be for various, and the snap ring of above-mentioned two kinds of shapes is relatively more commonly used.

Compared with prior art, the fast joint structure of this plastic pipe has following advantage:

1, guiding cap in the fast joint structure of this plastic pipe and the attachment hole on the body are for removably connecting, after guiding cap takes apart from attachment hole, take over and card snap ring thereon can spin off from body, the direction in the time of will taking over along original installation then continues across snap ring and just can make things convenient for fast and do not use additional dedicated instrument ground and will take over from body and spin off.

2, the seal ring in this linkage structure is provided with annular groove, has improved the sealing of whole linkage structure greatly.

3, reasonable in design, tight in this linkage structure has effectively avoided seal ring, snap ring etc. that deformation or displacement etc. take place, and has guaranteed the clamping effect of taking over.

4, this linkage structure is simple in structure, and is easy to operate.

Description of drawings

Fig. 1 is a sectional view of the present utility model.

Fig. 2 is the enlarged view of A among Fig. 1.

Fig. 3 is an explosive view of the present utility model.

Fig. 4 is the structural representation of the seal ring in the utility model.

Fig. 5 is the right elevation of Fig. 4.

Fig. 6 is the structural representation of snap ring in the utility model.

Fig. 7 is the another kind of structural representation of snap ring in the utility model.

Among the figure, 1, body; 2, attachment hole; 2a, step; 2b, shoulder block two; 3, take over; 4, guiding cap; 4a, shoulder block one; 5, circular groove; 6, seal ring; 6a, annular groove; 7, support ring; 8, snap ring; 8a, claw; 9, snap ring seat; 9a, retaining edge; 10, annular bar.

Embodiment

Below be specific embodiment of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.

Shown in Fig. 1,2 and 3, the fast joint structure of this plastic pipe, comprise body 1 with attachment hole 2, guiding cap 4 has been threaded on attachment hole 2, taking over 3 can extend under the leading role of guiding cap 4 in the attachment hole 2, the inwall of attachment hole 2 is provided with step 2a, and the front end of this step 2a and guiding cap 4 forms a circular groove 5, is provided with snap ring seat 9, snap ring 8, support ring 7 and seal ring 6 successively on the direction of edge adapter 3 insertion bodies 1 in circular groove 5.Have 20 claw 8a on the snap ring 8 to snap ring 8 inner inclination, snap ring 8 is contained in the snap ring seat 9, and snap ring seat 9 its ends near guiding cap 4 have retaining along 9a, and snap ring 8 is resisted against retaining along on the 9a, one end of support ring 7 is resisted against on the seal ring 6, and the other end is resisted against on the snap ring 8.The front end of guiding cap 4 is provided with shoulder block one 4a, and the front end of the step 2a on attachment hole 2 inwalls is provided with shoulder block two 2b.Shown in Figure 4 and 5, seal ring 6 is provided with an annular groove 6a.

Shown in Fig. 1,2 and 3, in the course of the work, earlier seal ring 6, support ring 7, snap ring 8 and snap ring seat 9 etc. are installed in the attachment hole 2 in order, then guiding cap 4 is installed in the attachment hole 2 by screw thread rotation.When needs connect adapter 3 fast, only need guiding cap 4 is inserted in adapter 3, under the leading role of guiding cap 4, extend in the attachment hole 2, when touching shoulder block two 2b on attachment hole 2 inwalls, the inserting end of taking over 3 spacingly firmly can not be continued again to stretch into by it, adapter 3 extend into attachment hole 2 backs and is blocked by the claw 8a on the snap ring 8, also has the annular groove 6a on seal ring 6 and the seal ring 6 to guarantee whole linkage structure good sealing property.When needs take out adapter 3 from attachment hole 2, only need the guiding cap 4 screw threads attachment hole 2 of back-outing, take over 3 and be stuck in snap ring 8 grades of taking on 3 and will detach body 1 together this moment, next only need to continue to intert the past along the direction of originally passing snap ring 8 and pass snap ring 8 and spin off from snap ring 8 until whole adapter 3 with taking over 3.Snap ring 8 grades that will spin off from body 1 at last reinstall in the attachment hole 2 on the body 1, then in the circular groove 5 that forms of the front end of step 2a that again they is encapsulated in attachment hole 2 inwalls by guiding cap 4 and being threaded of attachment hole 2 and guiding cap 4 to treat the use of next time.

The seal ring 6 of present embodiment is self-styled type seal ring, and snap ring 8 joins before and after 20 two heads doing on its U types of U type claw 8a for Stainless Steel Retainer Ring and its are shaped as and forms, as shown in Figure 6.

The shape of the snap ring 8 of present embodiment can also form for 16 claw 8a are connected on the annular bar 10, and the thin end of its claw 8a one end is thick, and its thick end and annular bar 10 be connected, as shown in Figure 7.

Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.

Claims

1. the fast joint structure of plastic pipe, comprise the have attachment hole body (1) of (2), described attachment hole (2) is provided with guiding cap (4), described body (1) can with the adapter of passing guiding cap (4) (3) clamping mutually, on the inwall of attachment hole (2), be provided with step (2a), step (2a) on the front end of described guiding cap (4) and attachment hole (2) inwall forms a circular groove (5), in circular groove (5), be provided with snap ring (8) and seal ring (6) successively on the direction of edge adapter (3) insertion bodies (1), have several claws (8a) on the described snap ring (8) to snap ring (8) inner inclination, this claw (8a) can block adapter (3), it is characterized in that: the attachment hole (2) on described guiding cap (4) and the body (1) is for removably connecting, when the attachment hole (2) of guiding cap (4) from body (1) when disassembling, described adapter (3) and card snap ring (8) thereon can spin off from body (1) together.

2. the fast joint structure of a kind of plastic pipe according to claim 1 is characterized in that, described guiding cap (4) is threaded with being detachably connected as of attachment hole (2) on the body (1).

3. the fast joint structure of a kind of plastic pipe according to claim 2 is characterized in that, described seal ring (6) is provided with at least one annular groove (6a).

4. the fast joint structure of a kind of plastic pipe according to claim 3, it is characterized in that, also be provided with snap ring seat (9) in the described circular groove (5), described snap ring (8) is contained in the above-mentioned snap ring seat (9), its end near guiding cap (4) of this snap ring seat (9) has retaining along (9a), and described snap ring (8) is resisted against above-mentioned retaining along on (9a).

5. according to the fast joint structure of claim 2 or 3 or 4 described a kind of plastic pipes, it is characterized in that, be provided with support ring (7) between described seal ring (6) and the snap ring (8), one end of this support ring (7) can support above-mentioned seal ring (6), and the other end is resisted against on the above-mentioned snap ring (8).

6. the fast joint structure of a kind of plastic pipe according to claim 5 is characterized in that, the front end of described guiding cap (4) is provided with shoulder block one (4a).

7. the fast joint structure of a kind of plastic pipe according to claim 6 is characterized in that, the front end of the step (2a) on described attachment hole (2) inwall is provided with shoulder block two (2b).

8. the fast joint structure of a kind of plastic pipe according to claim 5 is characterized in that, described snap ring (8) forms for the stainless steel material once-through.

9. the fast joint structure of a kind of plastic pipe according to claim 8 is characterized in that, described snap ring (8) forms for joining before and after two heads on several its U types of U type claw (8a).

10. the fast joint structure of a kind of plastic pipe according to claim 8, it is characterized in that, described snap ring (8) is connected in and forms on the annular bar (10) for several claws (8a), and the thin end of its claw (8a) end is thick, and its thick end and annular bar (10) are connected.