CN107606359A - A kind of pipe fitting plugs together the connector of self-locking - Google Patents

Abstract

The invention discloses a connector for inserting and self-locking pipe fittings, which includes a casing, which is characterized in that: the casing is a tubular cavity with an opening, and the casing has an insertion port for pipe fittings to be inserted into. The inside wall of the housing is provided with an inwardly protruding annular inclined surface, and the inclined surface extends from the inside to the direction of the insertion port; the housing is provided with a locking piece for pipe fittings, and the locking piece is There is a communication hole for pipe fittings to pass through in the same direction as the pipe fitting insertion port; the inner cavity of the housing is also provided with a limit block for controlling the up and down movement of the locking member, and the pipe fitting locking member also includes a The sliding block that slides on the inwardly protruding inclined surface of the inner wall of the housing cavity, the invention realizes the connection and disassembly of the pipe fittings through another plug-in locking structure, and the surface of the pipe fittings does not need to be grooved, and the service life of the connecting parts is improved .

Description

A pipe fitting self-locking connector

technical field

The present invention relates to a pipe fitting connector, in particular to a plug-in self-locking connector.

Background technique

Plug-in self-locking: Insert the connected pipe fittings into the connector, use the locking mechanism in the connector to snap the pipe inside and connect them firmly; at present, plug-in self-locking self-locking spring connectors are more commonly used. That is to say, there is an elastic piece extending downward toward the inner cavity of the connecting piece inside the connecting piece. The elastic piece is inclined downward. When pulling out, the elastic piece has resistance to pulling out relative to the pipe fitting. In some technical solutions, a small groove is provided on the outer wall of the pipe body to be inserted for better clamping effect. When the pipe fitting is inserted, the elastic piece The end of the plug enters the small groove to play a locking role; however, after the plug-in self-locking spring connector is inserted and pulled out many times, the elastic piece will age or wear, making it unable to lock or lock the inserted pipe fitting. The lock is not tight, and it can be pulled out with a single pull.

Contents of the invention

The invention provides a plug-in self-locking connector for pipe fittings, and provides a new locking structure with simple structure to replace the locking structure in the prior art.

Its specific technical scheme is as follows:

A pipe fitting self-locking connector, including a housing, characterized in that: the housing is a tubular cavity with an opening, the opening on the housing is an insertion port for pipe fittings, and the housing The inner wall of the body is provided with an inwardly protruding annular inclined surface, and the inclined surface extends from the inside to the insertion port; a locking piece of a pipe fitting is provided in the cavity of the housing, and the locking piece is provided with The connecting hole and the outer wall that the pipe passes through are consistent with the direction of the pipe insertion port; the pipe locking member also includes a circular sliding block that can slide on the inwardly protruding inclined surface of the inner wall of the housing cavity; the sliding block The diameter is greater than the thickness of the outer wall; the sliding block penetrates the outer wall and one end protrudes toward the communication hole of the locking member, and the sliding block can move freely; The position of the block, so that the sliding block is always in the limit block of the up and down movement within the length of the slope.

A preferred technical solution: the locking member and the inwardly protruding inclined surface of the casing are located on one side of the pipe fitting insertion opening.

A preferred technical solution: the pipe fitting lock is in the shape of a central cylinder, and the sliding block on the pipe fitting locking member is a group of circularly arranged and uniformly arranged balls located in the wall of the central passage cylinder. One end of the above-mentioned ball protrudes toward the communicating hole of the central cylinder, and the ball can roll relatively independently and freely.

A preferred technical solution: the ball is located at the lower end of the pipe fitting locking part, the upper end of the pipe fitting locking part is higher than the outermost end of the slope, preferably the upper end of the locking part is flush with the pipe fitting insertion port or exposed Or slightly lower than the insertion port as the unlocking end for the locking piece to unlock the pipe.

A preferred technical solution: the limit block is located under the locking piece of the pipe fitting and is in the form of an annular piece. The upper surface of the annular piece is provided with a protruding piece arranged obliquely. effect.

In a preferred technical solution: in order to prevent the lock from falling out from the opening of the housing, the diameter of the lower end of the cylindrical locking member, that is, the installation end of the sliding block, is larger than the opening of the housing.

A preferred technical solution: the outer diameter of the pipe locking member is slightly smaller than the smallest inner diameter on the annular inclined surface of the housing; that is, the locking member is located between the two inclined surfaces and the outer and outer walls are set close to the inclined surfaces; the locking The upper top end of the fitting is flush with or slightly exposed to the fitting opening, and the upper port of the fitting locking part and the fitting fitting opening are in a non-circular shape.

A preferred technical solution: it also includes a sealing device, the sealing device is located at the rear end of the housing, and the sealing device includes a ferrule and a sealing ring; the ferrule and the sealing ring are respectively two groups and cross Placement; the end close to the limit block is a ferrule and is fixed on the housing.

A preferred technical solution: the end close to the limit block is a positioning collar and the positioning collar is fixed on the housing, and the sealing ring is an O-ring.

A preferred technical solution: a pipe fitting connector, the pipe fitting connector includes a plurality of branch pipes, and each branch pipe is the plug-in self-locking connector of the above-mentioned pipe fittings.

Compared with the prior art, the present invention has the following effects:

1. The locking device provided by the present invention passes through the locking piece. The locking piece is provided with a communication hole adapted to the housing cavity, and the outer wall of the lower end of the locking piece is provided with a ball placement groove. The diameter is greater than the wall thickness of the locking piece; the placement groove is provided with an opening connected to the outside of the locking piece through the communication hole in the locking piece, that is, the two ends of the ball located in the placement groove face the communication hole of the locking piece and the locking piece respectively. The outer wall protrudes, that is, one end of the ball extends into the communication hole of the locking member, and the other end protrudes from the outer wall of the locking member; The opening of the outer wall is flush; the ball can freely roll relative to the locking piece. The locking piece is a limit block that restricts the movable position within the range of the inclined surface of the shell. When the pipe to be inserted is inserted through the insertion port of the shell and passes through the communication hole of the locking piece, it will drive the locking piece to move inward, and the lock The end surface of the ball in the connecting hole of the stopper is squeezed by the pipe fitting and then protrudes toward the outer wall of the locking part. When the locking part drops to a certain extent, it is stopped by the action of the limit block, and the pipe fitting can continue to move inward. When the pipe fitting is pulled out When it goes out, the locking piece is driven to move outward, and the ball rolls on the inclined surface and toward the insertion port on the inclined surface, so that the ball moves to the connecting hole of the locking piece so that the ball squeezes the pipe fitting; because the diameter of the inclined surface gradually decreases , at this time, the inclined surface begins to squeeze the ball towards the middle direction and gradually becomes larger, that is, the pipe is pulled tighter and tighter, thus achieving the locking effect.

2. The above-mentioned locking member is only for locking the pipe when it is pulled out, but the pipe can also be rotated in the housing. For some, the rotation of the pipe is not required, and even the rotation will cause trouble in connection. The housing of the present invention The shape of the outer wall of the insertion opening and the locking member at the insertion opening is non-circular to prevent relative transfer.

3. The unlocking end of the present invention is to pull out the inserted pipe body, that is, to pull out the inserted pipe body, press the unlocking end of the locking part to make the ball of the locking part break away from the inclined plane, At this time, the inclined plane loses the pressing force to the ball, and the ball does not lock the inserted tube body at the same time, so the tube body can be pulled out naturally at this moment.

Description of drawings:

Fig. 1 is a schematic cross-sectional view of a pipe fitting self-locking connector of the present invention

Fig. 2 is a schematic cross-sectional view of another structural section of the plug-in self-locking connector section of the pipe fitting of the present invention

Fig. 3 is a structural schematic diagram of the locking member of the present invention

Fig. 4 is a schematic diagram of the structure of the locking member and the housing opening of the present invention

Fig. 5 is a schematic structural view of the spacer of the present invention

detailed description

The present invention will be further described below through specific embodiments.

The external diameter of the insertion tube, the external diameter of the locking member, and the insertion port of the casing in the present invention are all carried out under the precondition of being compatible with each other.

In a specific embodiment of the present invention, a plug-in self-locking connector for pipe fittings includes a housing 1, the housing 1 includes a tubular cavity with an opening, and the opening is an insertion port 11 for inserting the pipe body 2 into. The front end of the cavity is provided with a pipe fitting inserted into the locking member 3 and a stop block 31 of the locking member, and the inside surface of the front end of the inner cavity is provided with a locking member that cooperates with the locking member to lock the pipe fitting 2 Inclined surface 12, the locking member includes an outer wall 36, a communication hole 33 surrounded by the outer wall that provides pipe fittings to enter the insertion port 11 and pass through the locking member; the outer wall 36 of the locking member is adjacent to the inner surface of the housing , the lower end of the outer wall 36 of the locking member is provided with a circular sliding block, and the diameter of the sliding block is greater than the thickness of the outer wall; The block can move freely; the inner cavity of the housing is also provided with a position-limiting block for controlling the position of the sliding block at the bottom end of the locking member, so that the sliding block is always within the range of the length of the slope; preferably the sliding block includes a ring Shaped ball group, this ring-shaped ball group includes the annular placement groove 34 that is positioned at the lower end of the locking piece and is arranged side by side apart from each other and the ball 35 that is positioned at the placement groove, is positioned on the both sides in the placement groove, that is, the outer wall 36 and the inner surface are respectively provided with a connecting ring. Place the inner opening of the groove and the outer opening of the outer wall 36, the diameter of the ball is greater than the wall thickness of the locking member, the diameter of the outer opening is greater than the diameter of the ball so that the ball is put into the opening, and the placement The opening located in the communication hole is smaller than the diameter of the ball to prevent the ball from falling out of the opening and one end of the ball protrudes into the communication hole of the locking member facing the inner port. The moving distance of the sliding block of the locking member 3 according to the present invention Located within the length of the slope 12; the inclination of the slope 12 of the present invention is preferably 5 degrees to 15 degrees; the limit is to limit the movement of the ball of the locking member within the length of the slope.

In a preferred embodiment: in order to engage the locking member 3 in the housing cavity, the lower end of the cylindrical locking member, that is, the mounting end of the sliding block, has a diameter larger than the opening of the housing.

A preferred technical solution: the limiting block 31 of the locking member is an elastic ring or an elastic block, preferably the elastic block is a hollow annular piece 312, and the annular piece is provided with a plurality of inclined upward extensions. The elastic piece 311, the extended elastic piece 311 abuts against the lower bottom surface of the locking member.

When the pipe fitting is not inserted into the connecting piece, the outer wall of the lower end of the locking piece is located on the inclined surface or the outer end surface of the ball is attached to the inclined surface 12 due to the action of the limit block, and the other end of the ball is protruding from the inward opening. When the pipe fitting 2 enters the insertion port 11 and passes through After passing through the connecting hole 33 of the locking member 3, the pipe body pushes against the ball and simultaneously drives the locking member 3 to move inward. Sliding inward on the inclined surface; at this time, the lower limit block 31 of the locking member, that is, the elastic piece 311, is squeezed by the locking piece. When it reaches a certain level, due to the elastic effect of the elastic piece 311, the locking piece 3 stops moving inward. , at this time, the pipe fitting 2 can continue to move inward after passing through the hollow part 312 of the limit block. Rolling outward, at this moment, the ball is extruded to the pipe fitting in the communication hole due to the action of the inclined surface 12. When the ball is pulled outward, the greater the extrusion force, the tighter the lock of the locking member; the above-mentioned limit block 31 can also be an elastic ring, one end of the elastic ring is fixed on the upper end of the housing, and the other end is fixed on the side of the locking piece, so that when the pipe piece drives the locking piece to move down, the elastic ring is pulled and generates a rebound force at the same time to prevent The lock moves.

A preferred embodiment: Aiming at the problem of preventing the tube body from being transferred in the casing cavity, the technical solution of the present invention can design the casing insertion port 11 and the outer shape 35 of the end close to the body insertion port of the locking member to be non-symmetrical. It is circular and the two are compatible, preferably a circular shape with notches at both ends, but the communication opening of the communication hole of the locking piece is still circular and allows the tube body 2 to be fit for insertion.

A preferred embodiment: the upper end of the locking member 3 is close to the insertion opening 11 of the casing, that is, the upper end can protrude from the insertion opening or be flush or located under the insertion opening and not lower than the outermost slope end 16; the upper end is the unlocking end 37, that is, when the pipe body 2 handles the locked state, in order to pull out the pipe fitting 2, at this moment, the ball, the inclined surface 12, and the surrounding surface of the pipe body 2 should have no extrusion force, as long as Apply downward pressure to the unlocking end 37 to move the locking member downward, and the ball 35 will break away from the inclined surface 12. At this time, the extrusion force between the three disappears, and the pipe body 2 can be pulled out.

A preferred technical solution: relative to some pipe connections that require a certain degree of sealing, the housing of the present invention also includes a placement tank 13 at the rear end and a sealing device located in the tank; the sealing device includes a ferrule 15 and an O Shaped ring 14, said ferrule 15 and O-ring 14 are placed crosswise, it is preferable to place ferrule 15 in a position close to the groove body of the limit block, and the ferrule is fixedly fixed on the housing to stabilize the limit block The position changes; then place the O-ring 14 and ferrule 15 in sequence; when the connecting pipe is used for gas-liquid communication, the pressure of the gas-liquid against the direction of the insertion port will generate a thrust on the sealing device. At this time, the O-ring, The tightness between the stress deformation of the ferrule increases and at the same time, the axial width becomes wider, which produces a squeezing force on the outer wall of the pipe body, and finally increases the sealing effect between the pipe body and the sealing device.

In this embodiment, it can also be a pipe fitting connector with multiple above-mentioned implementations, that is, like a pipe body tee, that is, a pipe body has multiple connectors, and each connector is the above-mentioned pipe body connectors.

The above is only a specific embodiment of the present invention, but the design concept of the present invention is not limited thereto, any insubstantial changes to the present invention by using this concept should be an act of violating the protection scope of the present invention.

Claims (10)

1. a kind of pipe fitting plugs together the connector of self-locking, including housing, it is characterised in that：Described housing is the tubulose with opening Cavity, described housing upper shed are the insert port of pipe fitting insertion, and described case inside wall inclines provided with inwardly protruding annular Inclined-plane, described inclined plane are extended from interior to insert port direction；The lock piece of a pipe fitting, institute are provided with described shell cavity The intercommunicating pore and outer wall consistent with pipe fitting insert port direction that pipe fitting passes through is provided with the lock piece stated；Described pipe fitting lock piece On also include the circular sliding shoe that can be slided in the inwardly protruded inclined plane of shell cavity inwall；The diameter of sliding shoe is more than The thickness of outer wall；Described sliding shoe protrudes through outer wall and one end to lock piece intercommunicating pore, and described sliding shoe can be free It is mobile；Described housing cavity is additionally provided with the position of the sliding shoe for controlling lock piece bottom, so that sliding shoe is constantly in Up and down limited block in the range of chamfer length.

2. a kind of pipe fitting as claimed in claim 1 plugs together the connector of self-locking, it is characterised in that：Described lock piece and housing Interior inwardly protruded inclined plane is located at the side of pipe fitting insert port.

3. a kind of pipe fitting as claimed in claim 1 plugs together the connector of self-locking, it is characterised in that：Described pipe fitting lock piece is in Middle through post body, sliding shoe on described pipe fitting lock piece is is circular layout and evenly distributed ball positioned at middle through post body wall Group, one end of the ball of the ball set are protruded towards intercommunicating pore in middle through post body, and the ball relatively independent can be rolled freely.

4. a kind of pipe fitting as claimed in claim 3 plugs together the connector of self-locking, it is characterised in that：Described ball set includes position It is separated by the annular standing groove of setting and ball one end in standing groove side by side towards connecting in middle through post body in lock piece lower end Through hole is protruded, and the ball relatively independent can be rolled freely.

5. a kind of pipe fitting as claimed in claim 4 plugs together the connector of self-locking, it is characterised in that：Described ball is located at pipe fitting The lower end of lock piece, the solution that the upper end of described pipe fitting lock piece is higher by beveled end outer end end to be unlocked as lock piece to pipe fitting Lock end.

6. a kind of pipe fitting as claimed in claim 1 plugs together the connector of self-locking, it is characterised in that：Described limited block is positioned at pipe Below part lock piece and it is in hollow ring piece, the hollow ring piece upper surface is provided with the lug being obliquely installed, the lug end Lock piece bottom surface is against to play a supportive role.

7. a kind of pipe fitting as claimed in claim 5 plugs together the connector of self-locking, it is characterised in that：Described pipe fitting lock piece Overall diameter be slightly smaller than the annular inclined plane minimum interior diameter of housing；The upper top of lock piece flushes or slightly with pipe fitting insert port Expose or be slightly less than, and the outer shape of pipe fitting lock piece is shaped as non-circular shape with housing insert port.

8. a kind of pipe fitting as described in claim 1.2.3.4.5.6.7 plugs together the connector of self-locking, it is characterised in that：Described Lock piece lower end is insert port of one end diameter more than housing for being equiped with sliding shoe.

9. a kind of pipe fitting as described in claim 1.2.3.4.5.6.7 plugs together the connector of self-locking, it is characterised by：Also include one Individual sealing device, described sealing device are located at the rear end of housing, and described sealing device includes lasso and sealing ring；Described Lasso and sealing ring intersect placement respectively；One end of described close limited block is lasso and is fixed on housing；Described is close Seal is O-ring.

10. a kind of pipe connecting component, is characterised by：Including multiple branch pipes, each branch pipe of book is above-mentioned claim institute The pipe fitting stated plugs together the connector of self-locking.