CN201152427Y - Safety quick joint - Google Patents

Abstract

A safety quick connector comprises a connector body, a plug-in seat connected to one end of the connector body, a movable seat arranged inside the plug-in seat, a first-section push-in seat set inside the movable seat, a plug-in seat set outside the plug-in seat, a first spring supported by the movable seat and the connector body, a second spring supported by the first-section push-in seat and the movable seat, and a third spring supported by a control ring and the connector body. In addition, a plurality of large steel balls and small steel balls are arranged on the peripheral wall of the plug-in seat. When the male connector is initially inserted, only the first-section push-in seat is pushed away, so that the steel balls fall into a ring groove of the male connector and the male connector obtains the first-section positioning. At this time, the movable seat is still closed to maintain a gas circuit-breaking state, so that the male connector can be smoothly initially plugged in without being affected by the gas. When the male connector continues to be inserted, the small steel balls are clamped on the outer peripheral edge of the movable seat for positioning. This is the second-section plug-in operation, and the plug-in of the male connector is completed.

Description

Safety quick connector

technical field

The utility model relates to the technical field of pipe joints, in particular to the structural design of safety quick joints.

Background technique

Quick connectors are often used in the connection of pipelines. There are several steel balls on the inner peripheral wall, which are inserted into a male connector with a ring groove on the outer peripheral wall. , to complete the plugging operation of the pipeline, and the quick connector is often used in pneumatic tools such as pneumatic nail guns, pneumatic grinders, etc. These pneumatic tools are powered by high-pressure gas, and are generally installed A male connector, while the air compressor is connected to a quick connector through a pipeline. Before it is plugged into the male connector, the interior of the quick connector is in a closed gas state through a movable seat. During the process of inserting the male connector into the quick connector, The movable seat will be pushed away, so that the pipeline is in a ventilated state, and when the male connector is inserted to the predetermined position, the steel ball will be inserted into the ring groove on the outer periphery of the male connector, and the male connector will be locked and positioned.

However, since the air compressor is continuously supplying air during the working process, before the male connector is inserted into the quick connector and has not been positioned, it has pushed the movable seat to cause high-pressure gas to escape. Therefore, it is very easy to flush out the male connector. Then re-insert, for users with less strength, it is often impossible to successfully complete the insertion of the quick connector.

When you want to pull out the male joint, you need to push a position control collar located on the outer peripheral wall of the quick joint by hand, so that the steel balls can retreat outwards to release the buckle state, and use a spring located inside the quick joint to move the movable seat Pop it out with the male connector. However, during the ejection process, the movable seat is still in a ventilated state. Therefore, the momentum of the high-pressure gas will accelerate the separation of the two. If the pipe is not grasped, the pipe may even be thrown around and hit the operator.

Although someone in the industry has designed a "quick connector bullet-proof structure" (Taiwan patent certificate number M284808, hereinafter referred to as the reference case), however, it is aimed at accidentally touching or hitting the position control collar during use, causing the male connector to bounce off. However, the disadvantages of not being easy to plug in, and when the male connector is to be untied, the gas instantly rushes away from the male connector and the quick connector have not been improved.

Therefore, no matter whether it is plugged in or unplugged, the current quick connectors are affected by the gas and have the disadvantages of being difficult to plug in and instantaneously opened, which not only causes inconvenience to work, but also poses dangers.

Contents of the invention

In order to improve the limitations and disadvantages of the existing quick connectors, the main purpose of the present invention is to provide a quick connector that prevents the male connector from being pushed out by the impact of high-pressure gas when the male connector is plugged in.

Based on the above purpose, the main technical means of the utility model is to provide a safety quick connector, including:

A joint body is a hollow cylinder with an air inlet end and an air outlet end, and an air chamber connected to the air outlet end is provided inside;

A socket, which includes a connecting end and an inserting end, the connecting end is connected to the gas outlet end of the joint body, a socket connecting the two ends is provided inside the socket, and a groove facing the center is provided at the inserting end. To the protruding inner retaining edge, the peripheral wall of the socket is provided with a plurality of axially extending elongated large bead grooves, and a plurality of small bead grooves respectively located between the two large bead grooves, and the small bead grooves are correspondingly located in the large The bead groove is away from the side of the outer retaining edge, and the outer peripheral wall of the socket is provided with more than one axially extending plane;

A movable seat is sheathed in the socket, which includes a closed end and an open end, the open end is against the inner retaining edge of the socket, and the outer peripheral wall of the movable seat is provided with a The retaining edge, a plurality of steel ball perforations adjacent to the open end, and a concave edge, the retaining edge is closed at the connecting end of the socket when the male connector is not inserted, the number and distribution angle of each steel ball perforation are the same as those of the large bead groove, The interior of the movable seat is hollow in communication with the opening end, and more than one air passage communicated with the interior is provided on the peripheral wall of the movable seat adjacent to the retaining edge;

A first-stage push seat is located inside the movable seat, including a sleeve and a first tightening ring located inside the sleeve. The front end of the sleeve is provided with a front retaining edge. The inner diameter of the retaining edge is between the outer diameter of the sleeve and the inner diameter of the front retaining edge, and the first tightening ring is an elastic hollow object;

A position control collar is a hollow body sheathed on the periphery of the socket. Its interior includes a large diameter part and a small diameter part. It is located in the middle section and is equipped with one or more planes to match the socket. The inner peripheral wall of the small diameter part is provided with a plurality of axially extending grooves. large diameter part;

A first spring is axially supported on the retaining edge of the movable seat and inside the joint body;

A second spring is axially supported inside the first section of the push seat and the movable seat;

A third spring is axially supported on the rear end of the small-diameter part of the socket and the joint body;

A plurality of large steel balls are respectively arranged in the large ball groove and the steel ball perforation and lean against the outer peripheral wall of the sleeve of the first section of the push seat;

A plurality of small steel balls are respectively arranged in the small ball grooves and lean against the peripheral wall of the movable seat.

After implementing above-mentioned technical means, the concrete benefit that the utility model can obtain is:

The utility model utilizes the difference in the diameters of the big steel ball and the small steel ball to control the movement and lock positioning of the concentric and axially moving multi-layer tubular objects. The big steel ball is set in the elongated big ball groove. At the beginning, only the first section of the push seat will be pushed away, so that the steel ball will fall into a ring groove of the male joint, so that the male joint will be positioned in the first section. At this time, the quick joint still maintains the gas disconnection state through the retaining edge of the movable seat Therefore, at the beginning of plugging the male connector, it will not be affected by the impact of the gas. When the male connector continues to be inserted, the movable seat will be pushed away to allow the gas to be input until the large steel ball is displaced to the other end of the large ball groove, and is controlled. The inner peripheral wall of the small diameter part of the bit collar is pressed. At this time, the small steel ball also falls to the concave edge of the movable seat to form a clamping effect, and the male joint is positioned. This is the second stage of insertion operation. , although the gas is released, since most of the male joint has entered the interior of the movable seat, it can be guided and restricted by the movable seat so as not to deflect and rush out arbitrarily.

Conversely, when the male connector is to be pulled out, the male connector can also be retracted for a short distance, so that the movable seat is reset to a gas disconnection state, and then the male connector is continuously pulled out to prevent the male connector and the quick connector from popping off suddenly.

Description of drawings

Fig. 1 is a schematic diagram of the appearance of the three-dimensional combination of the utility model;

Fig. 2 is a three-dimensional exploded schematic diagram of the utility model;

Fig. 3 is when the utility model is in the normal state, the plan combination sectional schematic diagram of longitudinal section from the big steel ball place;

Fig. 4 is when the utility model is in the normal state, a schematic diagram of a plane combined section longitudinally cut from the small steel ball;

Fig. 5 is a schematic diagram of a plane combined section longitudinally sectioned from the large steel ball when the first section of the male joint of the utility model is inserted into the card;

Fig. 6 is a schematic diagram of a planar composite cross-section longitudinally sectioned from the small steel ball when the first section of the male connector of the present invention is inserted into the card;

Fig. 7 is a schematic diagram of a planar composite cross-section longitudinally sectioned from the large steel ball when the male joint and the quick joint of the utility model are inserted into the card;

Fig. 8 is a schematic diagram of a planar composite cross-section longitudinally sectioned from the small steel ball when the male connector and the quick connector of the present invention are inserted into the card;

Fig. 9 is a planar cross-sectional schematic diagram of the utility model mated with another shape of a male connector when plugged in.

Description of reference signs: 1-quick connector; 10-joint body; 100-inlet end; 101-outlet end; 11-air chamber; 12-internal thread; 15-first spring; 18-second spring; 19- The third spring; 20-socket seat; 200-joint end; 201-insert end; 202-seal ring; 21-outer retaining edge; 22-inner retaining edge; Small ball groove; 26-pressure relief hole; 27-big steel ball; 28-small steel ball; 30-position control collar; 31-large diameter part; 32-small diameter part; 320-groove; 40-movable seat; -closed end; 401-open end; 41-retaining edge; 42-first chamber; 43-second chamber; 44-ventilation channel; 45-concave edge; 46-steel ball perforation; 50-first push seat ;51-sleeve; 510-front retaining edge; 52-first tightening ring; 53-second tightening ring; 60, 60A-male joint; 61, 61A-column body; 612 - ring groove.

Detailed ways

Referring to Fig. 1 to Fig. 4, among them Fig. 3, Fig. 4 are the planar cross-sectional views of different angles of the utility model, the utility model provides safety type quick connector 1 is to comprise a connector body 10, a first spring 15, a second Spring 18, a third spring 19, a receptacle 20, a position control collar 30, a movable seat 40, a first stage push seat 50, a plurality of large steel balls 27 and a plurality of small steel balls 28.

The joint body 10 is a hollow cylinder with two opposite ends, and the two ends are respectively set as an air inlet end 100 and an air outlet end 101. An air chamber 11 is arranged inside the joint body 10, and the air chamber 11 is located at the air outlet end 101. A section of internal thread 12 is used to engage with the socket 20 described above.

The socket 20 is a hollow pipe with two ends, and the two ends are respectively set as a joint end 200 and an insertion end 201, and a section of external thread is provided on the outer peripheral wall of the joint end 200 to match the internal thread of the joint body 10. 12 matching screws, the socket 20 is provided with a cavity 23 connected to the two ends, the socket 20 is located at the insertion end 201 and is provided with an outer retaining edge 21 radially protruding from the outer peripheral wall, and a cavity 23 The inner retaining edge 22 protruding radially from the peripheral wall toward the center is provided with at least one plane extending along the axial direction on the annular outer peripheral wall of the socket 20, preferably the annular outer periphery of the socket 20 is set as a polygon, as shown in the drawing The preferred embodiment shown has 8 surfaces, including four planes and four arc surfaces respectively arranged between the two planes, and a long and large bead groove extending along the axial direction is respectively provided on the four planes 24, and a circular small bead groove 25 is respectively provided on the arc surface. The large bead groove 24 extends axially between the outer retaining edge 21 and the middle section of the socket 20, and the small bead groove 25 is located in the socket 20 middle section, and preferably the small bead groove 25 and the large bead groove 24 are located on the same section, the large bead groove 24 and the small bead groove 25 are respectively provided with a described large steel ball 27, small steel ball 28, large steel ball 27 and can be moved along the large bead groove 24 by the action of the movable seat 40 , and more than one pressure relief hole 26 penetrating through the peripheral wall is provided at the socket seat 20 adjacent to the connecting end 200 .

The movable seat 40 is inserted into the slot 23 of the receptacle 20, and includes a closed end 400 and an open end 401. The movable seat 40 is provided with a radially protruding retaining edge adjacent to the closed end 400. 41, the outer diameter of the retaining edge 41 is greater than the inner diameter of the connecting end 200 of the socket 20, the first spring 15 is provided between the retaining edge 41 and the end of the air chamber 11, and the elastic force of the first spring 15 The top support makes the retaining edge 41 close to the connecting end 200 of the closed socket 20, and one or more air passages 44 are arranged on the peripheral wall between the retaining edge 41 and the middle section of the movable seat 40, and the movable seat 40 is adjacent The outer peripheral wall of the opening end 401 is provided with a radially recessed concave edge 45, and the concave edge 45 is provided with a plurality of circular steel ball perforations 46 matching the large ball grooves 24. The diameter of the steel ball perforation holes 46 is larger than that of the large steel balls 27. In addition, a first chamber 42 adjacent to the closed end 400 and communicated with the air passage 44 is provided inside the movable seat 40, and a second chamber 43 communicated with the first chamber 42 and the open end 401, the second chamber The inner diameter of the chamber 43 is larger than the inner diameter of the first chamber 42 and the inner retaining edge 22 , so that the second spring 18 and the first push seat 50 are provided in the second chamber 43 .

The first section push seat 50 includes a sleeve 51, a first tightening ring 52 and a second tightening ring 53, the front end of the sleeve 51 has a front retaining edge 510, the outer diameter of the front retaining edge 510 is larger than The inner diameter of the inner retaining edge 22, and the inner diameter of the front retaining edge 510 is smaller than the inner retaining edge 22, and the two tightening rings are arranged inside the sleeve 51, and the first tightening ring 52 is attached to the front retaining edge 510 side, the second The tightening ring 53 is then sleeved on the first tightening ring 52, and the inner peripheral walls of the first tightening ring 52 and the second tightening ring 53 are provided with multiple sections of different inner diameters, and the inner diameters of the multiple sections are gradually increased from the end of the front retaining edge 510. The second spring 18 is supported between the second tightening ring 53 and the front end of the first chamber 42, so that the first section of the push seat 50 is subjected to elastic force and is in a normal state. Push it toward the inner retaining edge 22 of the receptacle 20 .

The large steel ball 27 is inserted into the large ball groove 24 and the steel ball perforation 46 to reach the ring-shaped outer peripheral wall of the sleeve 51; The annular peripheral wall of the movable seat 40 is limited by the position control collar 30;

The position control collar 30 is a hollow sleeve with two ends, which is sheathed on the outer peripheral wall of the socket 20. The inner peripheral wall of the position control collar 30 includes a large diameter portion 31 located in the front section and a small diameter section located in the middle section. part 32, the third spring 19 is supported between the rear end of the small diameter part 32 and the joint body 10, and the position control collar 30 is normally pushed to the connecting end 200 of the socket 20 by the elastic force to the small diameter part 32 The leading edge is pressed against the large steel ball 27. At this time, the inner peripheral wall of the large diameter portion 31 is also pressed against the outer peripheral edge of each large steel ball 27 to limit the large steel ball 27 from slipping out. The seat 20 is polygonally matched, and is equipped with a groove 320 that can accommodate the small steel ball 28. The groove 320 is axially extended to the middle section and the front end of the small diameter portion 32, and the position control collar 30 can be integrally formed. It can also be composed of two front and rear rings as shown in the figure. The large diameter part 31 and the small diameter part 32 are arranged on the front ring body, and the inside of the rear ring body is tightly fitted and sleeved on the small diameter part. 32 second half of the outer annular periphery.

Please refer to Figure 3 again. Under normal conditions, the movable seat 40 of the quick connector 1 is pushed up by the first spring 15, so that the retaining edge 41 is closed to the connecting end 200 of the socket 20, and the air passage 44 is located at the socket end. The inside of the seat 20 is in a state of gas disconnection. If the intake end 100 has been connected to the air compressor, it will be further affected by the gas in the pipe, so that the retaining edge 41 is tightly closed to the connection end 200 .

As shown in Figure 5, it is the first action of plugging the first type of male connector 60 of the present utility model. The male connector 60 includes a column body 61, and a group connection end 610 is provided at the end of the column body 61. The group connection end The outer diameter of 610 is smaller than that of the column body 61. In addition, a recessed ring groove 612 is provided on the column body 61 adjacent to the assembly end 610. The male joint 60 is inserted into the sleeve 51 of the first push seat 50 through the assembly end 610. And the end of the column body 61 is pushed against the first section of the push seat 50 to be displaced inwardly. When the ring groove 612 reaches the big steel ball 27, the big steel ball 27 falls into the ring groove 612, and the position control collar 30 is pressed by the third spring. The elastic force of 19 moves forward, so that the small-diameter part 32 is displaced to the outer periphery of the large steel ball 27, forming a suppressing effect on the large steel ball 27, and the large steel ball 27 promptly blocks the male joint 60 to form the first section of card insertion. At this time, it can The moving seat 40 does not move, but still closes the connecting end 200 by the retaining edge 41 to form a gas disconnection state. Therefore, during the card insertion process of the male connector 60, the male connector 60 will not be separated from the quick connector 1 due to the impact of gas. In addition, as shown in FIG. 6 , after the first stage of card insertion, the small steel ball 28 still abuts against the peripheral wall of the movable seat 40 without moving.

As shown in Fig. 7 and Fig. 8, if the male joint 60 is inserted further, the movable seat 40 and the large steel ball 27 will be displaced inwardly, so that the air channel 44 of the movable seat 40 will be in a ventilation state, and the large steel ball 27 will be displaced to the large The other end of the bead groove 24, at this time, the small steel ball 28 falls in the concave edge 45 of the movable seat 40 as shown in Figure 8, and the control collar 30 is pushed forward by the effect of the third spring 19 again, so that the small diameter At this time, the groove 320 of the small-diameter part 32 is also out of the scope of the small steel ball 28, and the small steel ball 28 is limited by the inner peripheral wall of the small-diameter part 32, and the male joint is completed. 60 plug-in operation. Also, if the air pressure is too high enough to pass through a sealing ring 202 on the peripheral wall of the receptacle 20 , the excessive gas will release pressure from the rear end of the position control collar 30 through the pressure relief hole 26 .

From the above, it can be known that the design of the utility model makes the male joint 60 a two-stage card insertion. When the first section is inserted, the interior of the quick joint 1 is still in the state of gas disconnection, so that the male joint 60 can be inserted smoothly and is supported by the large steel ball 27. At this time, most of the male joint 60 has entered the interior of the movable seat 40. Therefore, under the guidance and restriction of the movable seat 40, when the male joint 60 is inserted in the second section, although it has begun to release The high-pressure air can still be inserted and positioned smoothly.

In addition, as shown in FIG. 9 , it is a schematic diagram of another male connector 60A plugged in according to the present invention. Compared with the previous male connector 60 , this male connector 60A has a thinner assembly end 610A and a shorter length. long, and a slope is formed between the assembly end 610A and the column body 61A, and the sleeve 51 of the first section of the push seat 50 is pushed up by the slope, and the outer peripheral edge of the assembly end 610A is closed by the first clamping ring 52 smaller inner diameter.

The above shows that the present utility model can be plugged with existing male connectors 60 and 60A of different shapes.

It should be noted that the above specific implementation methods are only preferred embodiments, and are illustrative rather than restrictive to the utility model. Those skilled in the art can change, modify or even make equivalents without departing from the spirit and scope of the utility model, and these changes will all fall into the protection scope of the claims of the utility model.

Claims (4)

1. A safety quick connector, characterized in that it comprises: A joint body, which is a hollow cylinder with an air inlet end and an air outlet end, and an air chamber connected to the air outlet end is provided inside; A socket, which includes a connecting end and an inserting end, the connecting end is connected to the gas outlet end of the joint body, a socket connecting the two ends is provided inside the socket, and a groove facing the center is provided at the inserting end. To the protruding inner retaining edge, the peripheral wall of the socket is provided with a plurality of axially extending elongated large bead grooves, and a plurality of small bead grooves respectively located between the two large bead grooves, and the small bead grooves are correspondingly located in the large The bead groove is away from the side of the outer retaining edge, and the outer peripheral wall of the socket is provided with more than one axially extending plane; A movable seat is sheathed in the socket, which includes a closed end and an open end, the open end is against the inner retaining edge of the socket, and the outer peripheral wall of the movable seat is provided with a The retaining edge, a plurality of steel ball perforations adjacent to the open end, and a concave edge, the retaining edge is closed at the connecting end of the socket when the male connector is not inserted, the number and distribution angle of each steel ball perforation are the same as those of the large bead groove, The interior of the movable seat is hollow in communication with the open end, and one or more air passages communicating with the interior are provided on the peripheral wall of the movable seat adjacent to the retaining edge; A first-stage push seat is located inside the movable seat, including a sleeve and a first tightening ring located inside the sleeve. The front end of the sleeve is provided with a front retaining edge. The inner diameter of the retaining edge is between the outer diameter of the sleeve and the inner diameter of the front retaining edge, and the first tightening ring is an elastic hollow object; A position control collar is a hollow body sheathed on the periphery of the socket. Its interior includes a large diameter part and a small diameter part. It is located in the middle section and has more than one plane to match with the socket. The inner peripheral wall of the small diameter part is provided with a plurality of axially extending grooves. The number and arrangement angle of each groove are the same as the small bead groove, and the grooves are connected to the large diameter department; A first spring is axially supported on the retaining edge of the movable seat and inside the joint body; A second spring is axially supported inside the first section of the push seat and the movable seat; A third spring is axially supported on the rear end of the small-diameter part of the socket and the joint body; A plurality of large steel balls are respectively arranged in the large ball groove and the steel ball perforation and lean against the outer peripheral wall of the sleeve of the first section of the push seat; A plurality of small steel balls are respectively arranged in the small ball grooves and lean against the peripheral wall of the movable seat. 2 . The safety quick connector according to claim 1 , wherein the concave edge of the movable seat is adjacent to the opening end, and the steel ball perforation is provided on the concave edge. 3 . 3. The safety quick connector according to claim 1 or 2, characterized in that one or more pressure relief holes are provided on the peripheral wall of the socket adjacent to the connecting end. 4. The safety quick connector according to claim 3, characterized in that, the socket is provided with an outer retaining edge protruding radially outward at the insertion end, and the large bead groove is arranged on the outer retaining edge and the middle section of the socket.

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