CN117052931A - Ball valve type fluid connector with anti-false-breaking function - Google Patents

Abstract

The invention relates to a ball valve-type fluid connector with a function of preventing false disconnection. It includes a housing with a flow channel extending in the axial direction; a ball valve that can be in a closed position to block the flow channel and an open position to open the flow channel. The first hole of the housing is provided with an unlocking guide rod, and when the unlocking guide rod is in the locking position, the ball valve remains in the closed position, and when it is in the unlocking position, the ball valve is allowed to rotate from the closed position to the open position; the second There is a locking guide rod in the hole, which can move freely between the first position and the second position when the ball valve is closed, and remains in the first position when the ball valve is opened; when the connector is connected to the adapter When the connectors are engaged, the mating connector maintains the locking guide rod in the first position and the unlocking guide rod in the unlocked position; when the connector is separated from the mating connector, the locking guide rod remains in the first position, The unlocking guide rod remains in the locked position; this can avoid pipeline accidents caused by misoperation.

Description

A ball valve type fluid connector with the function of preventing false disconnection

Technical field

The invention belongs to the technical field of connectors, and specifically relates to a ball valve type fluid connector with an anti-accidental disconnection function.

Background technique

The ball valve fluid connector is a valve core with a spherical structure. When the flow channel of the ball valve fluid connector is opened, its flow channel is almost equivalent to a pipe with the same diameter at one end. The flow resistance is extremely low and full flow transmission can be achieved. The characteristics are widely used in main pipelines.

Most of the existing ball valve connectors on the market, such as ordinary water valves, do not have quick disconnect and connection functions. Disconnecting and connecting are relatively troublesome, and maintenance is difficult and periodic. Secondly, most ball valve connectors are not error-proof. The breaking function, or the anti-accidental breaking function, has a complex structure, high coordination accuracy, and difficult production. Misoperation when the system is not shut down will cause large-scale leakage of media and cause major accidents.

Contents of the invention

The purpose of the present invention is to provide a ball valve type fluid connector with an anti-accidental disconnection function, which can not only quickly connect and facilitate plugging and unplugging, but also has an anti-accidental disconnection function, which has great potential market value.

The purpose of the present invention and solving its technical problems are achieved by adopting the following technical solutions. According to the present invention, a ball valve-type fluid connector with an anti-mis-disconnection function is proposed, which includes: a housing with an axially extending flow channel, and the front end of the housing can be connected with an adapter connector. ; A ball valve that can rotate between a closed position that blocks the flow channel and an open position that opens the flow channel; the housing is provided with a first hole and a second hole opening on the front end face; the first hole There is an unlocking guide rod that can move between the locking position and the unlocking position. When it is in the locking position, the front end of the unlocking guide rod extends out of the first hole to keep the ball valve in the closed position. When it is in the unlocking position, , the front end of the unlocking guide rod retracts into the first hole, allowing the ball valve to rotate from the closed position to the open position; the second hole is provided with the front end extending out of the second hole in the first position, and retracting the second hole in the second position. The locking guide rod in the two holes can move freely between the first position and the second position when the ball valve is closed, and remains in the first position when the ball valve is open;

When the connector is engaged with the mating connector, the mating connector maintains the locking guide bar in the first position and the unlocking guide bar in the unlocked position; when the connector is separated from the mating connector, the locking guide bar Remain in the first position and the unlocking guide rod remains in the locked position.

The purpose of the present invention and solving its technical problems can also be further achieved by adopting the following technical measures.

In the aforementioned ball valve fluid connector with the function of preventing false disconnection, the connection between the connector and the adapter connector is achieved through relative rotation of the housing.

In the aforementioned ball valve fluid connector with the function of preventing false disconnection, the locking guide rod and the unlocking guide rod are distributed on both sides of the ball valve stem.

In the aforementioned ball valve fluid connector with the function of preventing false disconnection, an elastic member is provided between the unlocking guide rod and the first hole, which can provide the unlocking guide rod with power to move from the unlocking position to the locking position; lock An elastic member is provided between the tightening guide rod and the second hole, which can provide power for the locking guide rod to move from the second position to the first position.

In the aforementioned ball valve fluid connector with the function of preventing false disconnection, the outer circumferential surface of the valve stem is provided with a locking groove that locks with the ball. When the unlocking guide rod is in the locking position, the outer diameter of the unlocking guide rod presses the ball. Let it be embedded in the locking groove; when the unlocking guide rod is in the unlocking position, the groove structure on the outer periphery of the unlocking guide rod provides space for the balls to escape from the locking groove.

In the aforementioned ball valve-type fluid connector with the function of preventing false disconnection, the outer circumferential surface of the valve stem is also provided with an escape groove. The maximum outer circumference of the ball valve limits the axial position of the locking guide rod. When the ball valve is closed, the escape groove Allows the locking guide rod to move axially rearward and prevents it from moving axially forward.

In the aforementioned ball valve-type fluid connector with the function of preventing false disconnection, the locking guide rod is a reducing rod that is thin in the middle and thick at both ends, and the maximum outer circle of the valve rod matches the small diameter of the locking guide rod and the locking guide rod. The large diameter part of the locking guide rod is axially blocked. When the ball valve is closed, the avoidance groove provides space for the large diameter part of the front end of the locking guide rod to avoid the valve stem.

In the aforementioned ball valve fluid connector with the function of preventing false disconnection, the adapting end connector maintains the locking guide rod in the first position through a relief groove on the front end surface of the housing, and the relief groove is in contact with the locking The matching surface of the guide rod has an inclined surface that gradually compresses the locking guide rod during the separation process.

The aforementioned ball valve type fluid connector with the function of preventing false disconnection, the connector and the adapter connector achieve rotational combination and locking through the cooperation of the claws and grooves distributed along the circumferential direction on the front end surface of the housing; The clamping groove includes a groove for accommodating the claw and a stop edge that cooperates with the axial stop of the claw. The missing edge on one side of the slot forms an entrance for the claw to be inserted.

In the aforementioned ball valve fluid connector with the function of preventing false disconnection, the front ends of the connector and the adapter connector housing are symmetrically provided with two claws, two clamping slots and two relief slots, and the two clamping slots are The entrance direction is opposite, so that the connector has two rotatable directions when combined with the adapter connector.

The aforementioned ball valve type fluid connector with the function of preventing false disconnection is characterized in that: the end of the valve stem of the ball valve is connected to a handle, and an interlocking system is provided between the handle and the housing to prevent the handle from rotating incorrectly.

In the aforementioned ball valve-type fluid connector with the function of preventing false disconnection, the housing is axially limited and rotationally connected through balls between the tail accessories.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. Through the above technical solution, the present invention can achieve considerable technological progress and practicality, and has extensive industrial utilization value. It has at least the following advantages:

①Self-sealing function: The connector of the present invention can seal the internal liquid when it is disconnected.

② Full flow "zero" flow resistance function: When the connector of the present invention is connected, after the ball valve is opened, the inside of the connector is a straight pipe, which greatly reduces the flow resistance, and the sealing rubber ring is not located in the flow channel, so the product It is not limited by the flow rate, thus achieving low flow resistance and high circulation performance.

③The product is equipped with an anti-accidental disconnection function: when the connector of the invention is disconnected, the ball valve of the connector cannot be opened directly by twisting the handle; when the connector is connected in place, the ball valve of the connector cannot be opened directly; when the connector is connected In this state, the connector cannot be separated and disconnected until the ball valve of the connector at either end is closed; this avoids the accident of accidentally opening the pipeline and leaking due to misoperation, which greatly improves the safety of the product.

④ Can be plugged and pulled under pressure: The connector of the present invention can be easily plugged and pulled without system shutdown, solving the problem of existing products being unable to operate under high pressure.

⑤The tail can rotate freely 360°: The tail is designed to rotate freely 360°, which effectively solves the problem of twisting of the tail pipeline during use of the connector.

⑥The locking and unlocking mechanism has simple structural parts, low matching accuracy requirements, easy manufacturing, simple assembly, and low production cost.

Description of the drawings

Figure 1 is a three-dimensional schematic diagram of a ball valve-type fluid connector with an anti-accidental disconnection function according to the present invention;

Figure 2 is a top view of the ball valve fluid connector with the function of preventing false disconnection according to the present invention;

Figure 3 is a cross-sectional view of a ball valve-type fluid connector with an anti-accidental disconnection function according to the present invention;

Figure 4 is a partial cross-sectional view of the ball valve type fluid connector with the function of preventing false disconnection according to the present invention;

Figure 5 is another partial cross-sectional view of the ball valve type fluid connector with the function of preventing false disconnection according to the present invention;

Figure 6 is a partial cross-sectional view of the handle of the ball valve type fluid connector with the function of preventing false disconnection according to the present invention;

Figure 7 is another cross-sectional view of the handle of the ball valve type fluid connector with the function of preventing false disconnection according to the present invention;

Figure 8 is a partial cross-sectional view of the insertion process of the ball valve-type fluid connector with the function of preventing false disconnection and the adapter connector according to the present invention;

Figure 9 is a cross-sectional view of another part of the mating process between the connector of the present invention and the adapting connector;

Figure 10 is a partial cross-sectional view of the valve in the unopened state when the connector of the present invention and the adapter connector are inserted into place;

Figure 11 is another partial cross-sectional view of the valve in the unopened state when the connector of the present invention and the adapter connector are inserted into place;

Figure 12 is a partial cross-sectional view of the valve in the open state after the connector of the present invention and the adapter connector are inserted into place;

Figure 13 is another partial cross-sectional view of the valve in the open state after the connector of the present invention and the adapter connector are inserted into place.

[Description of main component symbols]

1: Shell

2: Circulation channel

3: Valve body

4: Valve stem

5: Ball

6: The first hole

7: Second hole

8: Unlock the guide rod

9: Lock the guide rod

10: Claw

11: Card slot

12: Give way slot

13: Block edge

14: Groove

15: First elastic member

16: Second elastic member

17: Locking groove

18: Avoidance slot

19: handle

20: First level guide rod

21: First level guide rod spring

22: Secondary guide rod

23: Secondary guide rod spring

24: Transmission ball

25: Locking ball

26: Unlock slot

27: Lock slot

28: steel ball

29: Tail attachment

Detailed ways

In order to further elaborate on the technical means and effects adopted by the present invention to achieve the intended inventive purpose, the following is a detailed description of the ball valve type fluid connector with anti-accidental disconnection function proposed according to the present invention in conjunction with the drawings and preferred embodiments. , structure, characteristics and functions are described in detail below.

Please refer to Figures 1-13. The ball valve type fluid connector with the function of preventing false disconnection of the present invention includes a housing 1 with a flow channel 2 extending along the axial direction. The flow housing 2 extends from one end of the housing to the other end, so as to The fluid can flow from one end of the connector to the other end along the flow channel 2 . A spherical valve body 3 is rotatably provided in the flow channel 2 of the housing 2. The valve body 3 includes a spherical surface and a diameter hole extending from the spherical surface. The valve body 3 has an open position in the flow channel 2 and In the closed position, when in the open position, the diameter hole of the valve body 3 is coaxially aligned with the flow channel 2, allowing fluid to flow from one end of the flow channel 2 to the other end through the diameter hole; when in the closed position, the valve body 3 The spherical surface is axially opposite to the flow channel 2, which blocks the flow of fluid from one end of the flow channel to the other end.

A valve stem 4 is joined to one side surface of the valve body 3. The valve stem 4 rotates and seals with the housing 2 and extends to the outside of the housing 2. After extending out of the housing 2, it is connected to the handle 19. The handle 19 drives the valve. The rod 4 rotates, thereby driving the valve body 3 to rotate between the closed position and the open position. The valve stem 4 and the valve body 3 move synchronously. When the valve body 3 is in the closed position, it is also called the closed position of the valve stem 4; the open position of the valve body 3 is also called the open position of the valve stem 4.

The front end of the housing 1 can be axially docked with the housing of the adapter connector. The front end of the housing 1 is provided with a first blind hole 6 and a second blind hole 7 extending in the axial direction. The first blind hole 6 and the second blind hole 7 are distributed on both sides of the valve stem 4. The first blind hole 6 is provided with an unlocking guide rod, the second blind hole 7 is provided with a locking guide rod 9, and the unlocking guide rod 8 has The locking position and the unlocking position, and can be freely switched between the locking position and the unlocking position. When it is in the locking position, the front end of the unlocking guide rod 8 extends out of the first blind hole 6, and can keep the valve stem 4 in In the closed position, the valve stem 4 is prevented from rotating from the closed position to the open position; when it is in the unlocked position, the front end of the unlocking guide rod 8 retracts into the first blind hole 6 and allows the valve stem 4 to rotate from the closed position to the open position.

The locking guide rod 9 has a first position where the front end extends out of the second blind hole 7 and a second position where the second blind hole 7 is retracted, and the locking guide rod 9 can be between the first position and the second position. move freely between.

In the embodiment of the present invention, the outer circumferential surface of the valve stem 4 is provided with a locking groove 17 for locking with the ball 5 and the unlocking guide rod 8 and for avoiding the locking guide rod 9 so that it can be locked by the third The escape groove 18 moves from one position to the second position. When the valve body 3 is in a closed state, the locking groove 17 is located at a position corresponding to the unlocking guide rod 8 , and the relief groove 18 is located at a position corresponding to the locking guide rod 9 .

When the unlocking guide rod 8 is in the locking position, the ball 5 is squeezed by the outer periphery of the unlocking guide rod 8 and embedded in the locking groove 17 on the outer periphery of the valve stem 4, so that the valve stem 4 and the ball 5 cooperate and lock to prevent it from being The closed position rotates to the open position; at this time, the escape groove 18 allows the locking guide rod 9 to move from the first position to the second position.

When the unlocking guide rod 8 is in the unlocking position, the ball 5 can move to the side of the unlocking guide rod 8 and disengage from the locking groove 17. The valve stem 4 and the ball 5 are unlocked, allowing the valve stem 4 to rotate from the closed position to the open position; At this time, the avoidance groove 18 is away from the locking guide rod 9, and the outer diameter of the valve stem 4 cooperates with the locking guide rod 9 to limit the position, so that the locking guide rod 9 cannot move axially and prevents it from moving between the first position and the second position. Move between locations.

In this embodiment, a first elastic member 15 is provided between the unlocking guide rod 8 and the first blind hole 6. The first elastic member 15 provides a force for the unlocking guide rod 8 to move from the unlocking position to the locking position. The power to move. A second elastic member 16 is also provided between the locking guide rod 9 and the second blind hole 7. The second elastic member 16 provides power for the locking guide rod 9 to move from the second position to the first position. . Preferably, the first elastic member 15 and the second elastic member 16 are both springs.

In this embodiment, the outer circumference of the unlocking guide rod 8 is provided with a groove structure 81 for providing radial movement space for the ball 5. When the groove structure 81 reaches the position corresponding to the ball 5, the valve stem 4 can be rotated. , squeezing the ball 5 to move into the groove structure 81, releasing the constraint on the valve stem, so that the ball valve can be opened. Specifically, the unlocking guide rod 8 is a variable-diameter guide rod, and the groove structure 81 is formed by changes in outer diameter size. Preferably, the unlocking guide rod includes the first-level outer diameter, the third-level outer diameter from front to back. The second-level outer diameter, the third-level outer diameter and the fourth-level outer diameter, where the first-level outer diameter and the fourth-level outer diameter have the same diameter, the second-level outer diameter is smaller than the third-level outer diameter, and the third-level outer diameter is smaller than the third-level outer diameter. The outer diameter of the third stage is smaller than the outer diameter of the first stage. The groove structure 81 is composed of a transition portion from the first-stage outer diameter to the second-stage outer diameter, a second-stage outer diameter, and a transition portion from the second-stage outer diameter to the third-stage outer diameter. The transition portion between the fourth-stage outer diameter and the third-stage outer diameter forms a step surface for axial blocking and limiting of the ball 5 to prevent the unlocking guide rod 8 from protruding from the first blind hole 6 . When the ball valve is in the closed position, the ball is located in the locking groove 17 on the valve stem. Under the push of the first elastic member, the third-stage outer diameter of the unlocking guide rod 8 fits the ball 5 so that the ball cannot move along the valve stem. 4 moves radially, thereby constraining the valve stem from rotating, that is, constraining the valve core from opening, that is, realizing the function of a single connector state, and the ball valve cannot be opened directly. When the two connectors are inserted into each other, the unlocking guide rod is compressed by the end face of the other end, compressing the spring backward, the third-stage outer diameter gives way, and the second-stage outer diameter is located below the steel ball. At this time, the steel ball has Displacement space, when the handle is turned, the steel balls are squeezed out, releasing the constraints on the valve stem, and the ball valve can be opened.

The locking guide rod 9 includes large-diameter sections at both ends and a small-diameter section in the middle, and the small-diameter section can cooperate with the maximum outer circle of the valve stem 4 with a small gap. The stepped surface formed between the large-diameter section and the small-diameter section is in contact with the valve stem. 4. The maximum outer circumferential axial stop limit is such that when the valve stem is in the open position, the locking guide rod 9 is axially limited by the outer circumference of the valve stem 4, and the locking guide rod 9 cannot move from the first position to the second position. Position moves. When the valve stem 4 is in the closed position, the escape groove 18 on the valve stem 4 returns to the position corresponding to the locking guide rod 9. At this time, the large diameter section of the rear end of the locking guide rod 9 is still blocked by the maximum outer diameter of the valve stem 4. The circular axial limit prevents it from moving axially forward, while the large diameter section of the front end is given way by the escape groove 18, allowing it to move axially backward, that is, the escape groove 18 allows the locking guide rod 9 to move from the first The position moves to the second position. Preferably, the escape groove 18 is triangular. The stepped surface formed between the large diameter section and the small diameter section of the locking guide rod 9 is a vertical surface perpendicular to the axial direction of the locking guide rod 9 .

When the connector of the present invention and the adapter end connector are inserted into place, the locking guide rod 9 can be maintained in the first position, that is, the adapter end housing is provided with a clearance that enables the locking guide rod 9 to be maintained in the first position. slot 12. Moreover, the connector of the present invention and the adapter connector are connected and locked through relative rotation of the housing. Since the locking guide rod 9 corresponds to the relief groove 12 of the adapter housing when inserted in place, only when the locking guide rod 9 can move from the first position to the second position, the locking guide rod 9 and The anti-rotation fit of the recess 12 can be released, that is, the connector and the adapter connector can be separated. The premise for the locking guide rod 9 to move from the first position to the second position is that the escape groove 18 on the valve stem 4 can rotate to the reducing diameter of the locking guide rod 9. At this time, the ball valve is in a closed state, that is, only when the ball valve When closed, the connector and mating connector can be separated. In this embodiment, the surface on which the relief groove 12 fits with the locking guide rod 9 is an inclined plane. This inclined surface feature enables the relief groove 12 to align with the axis of the locking guide rod 9 during the rotation and locking process of the connector. The compression gradually disappears, and the locking guide rod 9 gradually returns to the first position under the elastic force of the second elastic member, and is embedded in the relief groove 12; when unlocking and separating, the locking guide rod 9 is guided by the slope feature , gradually compress the second elastic member axially until it is completely pressed into the housing and reaches the second position. At this time, the two connectors are completely unlocked.

Because when the unlocking guide rod 8 is in the locking position, the ball valve must be in a closed state. When the ball valve is in an open state, the ball 5 is located in the groove structure of the unlocking guide rod, and the locking groove 17 on the valve body is away from the unlocking guide rod. The unlocking guide rod cannot move from the unlocking position to the locking position, that is, the connector cannot be inserted into the adapter connector. That is, the connector can only be mated with the mating connector when the ball valve is closed.

The single connector will remain in the locked position due to the external force of the unlocking guide rod 8, thus causing the valve stem of the ball valve to be locked, and the ball valve cannot rotate from the closed position to the open position, that is, the single connector remains in the closed state and cannot Open via valve stem.

In the embodiment of the present invention, the connector and the adapter connector are rotationally locked through the cooperation of the claws 10 and the claws 11 distributed along the circumferential direction on the front end surface of the housing. The clamping groove 11 includes a groove 14 and a retaining edge 13 formed inwardly along the radial direction of the housing from the upper end of the outer wall of the groove 14 to partially cover the groove 14. The clamping groove 11 includes a support portion extending perpendicularly to the end surface of the housing. and a snap-in portion extending radially outward from the housing. The snap-in portion and the support portion form a groove on the side away from the housing flow channel 2 that cooperates with the baffle edge of the snap groove 11 to achieve axial limitation. That is, when the connector and the mating connector are rotated and locked, the engaging portion of the claw 10 enters the groove 14 and axially stops and cooperates with the stop edge 13 .

One end of the slot 11 is also provided with an opening for the adapting end claw 10 to enter. The setting of the blocking edge 13 is canceled at the opening so that the claw 10 can enter the groove.

In this embodiment, two claws 10 and two slots 11 are provided, and the opening directions of the two slots are opposite, and the line connecting the two openings is perpendicular to the line connecting the centers of the two claws 10, so that the connector When docking with the adapter connector, the connection can be locked in both rotation directions, and the rotation direction can be freely rotated. That is, the connectable state of the connector of the present invention and the adapter connector can have two phases.

In this embodiment, there are also two relief grooves 12 , and the inclined trends of the slope features of the two relief grooves 12 are opposite, so that the connector can be connected to the adapting end when rotated in any direction. Lock the device and release the locking guide rod.

The handle 19 of the present invention is connected to the housing 1 through an interlocking system. Only when the interlocking system is unlocked, the handle 19 can rotate relative to the housing 1, thereby driving the valve stem 4 to rotate to realize the opening and closing of the valve. When the lock system is not opened, the handle 19 is locked on the housing 1 and cannot rotate.

The interlocking system includes a primary guide rod 20, a primary guide rod spring 21, a transmission ball 24, a secondary guide rod 22, a secondary guide rod spring 23 and a locking ball 25, wherein the secondary guide rod 22 is slidably disposed on In the blind hole of the handle 19, the secondary guide rod spring 23 is used to provide power for the secondary guide rod 22 to move out of the blind hole. The secondary guide rod 22 presses the locking ball 25 through its outer circumferential surface to keep it in the groove on the housing 1, thereby achieving anti-rotation locking between the handle 19 and the housing 1. The secondary guide rod has an unlocking groove 26 on its outer periphery. The unlocking groove 26 is used to provide a moving space for the locking ball 25 to escape from the groove on the housing 1 to realize the unlocking between the handle 19 and the housing 1 .

The primary guide rod 20 is slidably disposed in the other blind hole of the handle 19 , and the sliding directions of the primary guide rod 20 and the secondary guide rod 22 are perpendicular to each other. One end of the secondary guide rod 22 away from the secondary guide rod spring 23 is connected to the primary guide rod 20 through a transmission ball 24. The primary guide rod 20 has a lock groove 27 on its outer periphery. When the transmission ball 24 is located on the primary guide rod 20 When the secondary guide rod 22 is in the lock groove 27, the secondary guide rod 22 moves axially outward under the push of the secondary guide rod spring, and the unlocking groove 26 on the secondary guide rod 22 breaks away from the locking ball, so that the handle 19 remains with the housing 1 Lock.

The primary guide rod spring is located between the primary guide rod 20 and the housing, and is used to provide the force for the primary guide rod 20 to escape from the housing 1. The transmission ball 24 cooperates with the housing to prevent the primary guide rod 20 from moving out of the housing 1. The rod comes out under the force of the primary guide rod spring. Specifically, the wall of the lock groove 26 on the primary guide rod 20 facing the primary guide rod spring 21 is a vertical surface perpendicular to the axial direction of the primary guide rod, and the bottom of the groove is a plane along the axial direction of the primary guide rod. , the wall on the side away from the primary guide rod spring 21 is an inclined plane, which can gradually squeeze the transmission ball 24 when the primary guide rod 20 is pressed, so that it compresses the secondary guide rod. When the primary guide rod 20 is pressed, When the upper locking groove 27 is pressed away from the transmission ball 24, the unlocking groove 26 on the secondary guide rod 22 moves to a position corresponding to the locking ball 25. At this time, the handle is turned to cause the locking ball 25 to enter the secondary guide rod. inside, unlock and rotate with the housing 1.

In this embodiment, the mating surface of the secondary guide rod 22 and the transmission ball is a spherical surface that can partially accommodate the transmission ball 24, but it is not limited to this.

Through the design of the above interlocking system, in the natural state of the handle 19 of the present invention, the transmission ball is located in the lock groove of the primary guide rod, the locking ball is located in the groove of the housing and is limited by the outer periphery of the secondary guide rod, preventing It comes out of the groove of the housing and the handle cannot rotate. When it is necessary to unlock, press the primary guide rod 20, and the transmission ball 24, under the action of the primary guide rod 20, pushes the secondary guide rod 22 to compress the secondary guide rod spring 23 and move backward. When the unlocking groove of the secondary guide rod 22 When moving above the locking ball 25, the locking ball releases the limit. When the handle is moved at this time, the locking steel ball will come out of the groove to realize the unlocking of the handle.

In the embodiment of the present invention, the primary guide rod and the secondary guide rod are both variable-diameter guide rods, and the grooves thereon are located at small diameters, but they are not limited thereto.

In the embodiment of the present invention, the housing 1 and the tail attachment 29 are rotationally connected through steel balls 28 . The inner side of the tail of the housing 1 is provided with an arc-shaped groove extending in the circumferential direction, and the outer circumference of the tail attachment 29 is provided with an arc-shaped groove adapted to form a circular groove for accommodating the steel ball 28, so that the steel ball 28 is partially located in the housing 1 and partially located in the tail attachment 29 to achieve axial limiting and circumferential 360-degree relative rotation between the tail attachment 29 and the housing 1, thereby preventing the tail pipeline connected to the tail attachment from being used during use. Bending and twisting may occur.

The seal between the housing 1 and the tail attachment 29 during rotation is also achieved through a seal.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Although the present invention has been disclosed above in preferred embodiments, they are not intended to limit the present invention. Anyone familiar with this field will Skilled persons can make some changes or modifications to equivalent embodiments with equivalent changes using the technical content disclosed above without departing from the scope of the technical solution of the present invention. Technical Essence of the Invention Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solution of the invention.

Claims (12)

1. A ball valve type fluid connector with a false break prevention function, which is characterized in that: comprising the following steps:

a housing having a flow passage extending in an axial direction therein, and a front end capable of being coupled with the adapter connector;

a ball valve rotatable between a closed position blocking the flow passage and an open position opening the flow passage;

a first hole and a second hole which are opened on the front end face are arranged in the shell;

an unlocking guide rod capable of moving between a locking position and an unlocking position is arranged in the first hole, the front end of the unlocking guide rod extends out of the first hole when the ball valve is located in the locking position to prevent the ball valve from rotating from the closing position to the opening position, and the front end of the unlocking guide rod retracts into the first hole when the ball valve is located in the unlocking position to allow the ball valve to rotate from the closing position to the opening position;

the second hole is internally provided with a locking guide rod, the front end of the locking guide rod extends out of the second hole when in a first position, the front end of the locking guide rod retracts into the second hole when in a second position, the locking guide rod can freely move between the first position and the second position when the ball valve is closed, and the locking guide rod is kept in the first position when the ball valve is opened;

when the connector is engaged with the mating connector, the mating connector maintains the locking guide bar in the first position and the unlocking guide bar in the unlocking position; when the connector is separated from the mating connector, the lock guide is maintained in the first position and the unlock guide is maintained in the lock position.

2. The ball valve type fluid connector with anti-false-breaking function according to claim 1, wherein: engagement of the connector and the mating connector is achieved by relative rotation of the housing.

3. The ball valve type fluid connector with the function of preventing false break according to claim 2, wherein: the locking guide rod and the unlocking guide rod are distributed on two sides of the valve rod of the ball valve.

4. The ball valve type fluid connector with anti-false-breaking function according to claim 3, wherein: an elastic piece which can provide power for the unlocking guide rod to move from the unlocking position to the locking position is arranged between the unlocking guide rod and the first hole; an elastic member is provided between the locking guide and the second hole and is capable of providing power for the locking guide to move from the second position to the first position.

5. The ball valve type fluid connector with anti-false-breaking function according to claim 4, wherein: the outer peripheral surface of the valve rod is provided with a locking groove matched with the ball to be locked, and when the unlocking guide rod is positioned at the locking position, the outer diameter of the unlocking guide rod compresses the ball to be embedded in the locking groove; when the unlocking guide rod is located in the unlocking position, the groove structure at the periphery of the unlocking guide rod provides a yielding space for the balls to be separated from the locking groove.

6. The ball valve type fluid connector with anti-false-breaking function according to claim 5, wherein: the outer peripheral surface of the valve rod is also provided with an avoidance groove, the maximum excircle of the ball valve axially limits the locking guide rod, and when the ball valve is closed, the avoidance groove allows the locking guide rod to axially move backwards and prevents the locking guide rod from axially moving forwards.

7. The ball valve type fluid connector with anti-false-break function according to claim 6, wherein: the locking guide rod is a reducing rod with two thick middle thin ends, the largest outer circle of the valve rod is in small clearance fit with the small diameter of the locking guide rod, the locking guide rod is axially blocked with the large diameter of the locking guide rod, and when the ball valve is closed, the avoiding groove provides a space for avoiding the valve rod for the large diameter part at the front end of the locking guide rod.

8. The ball valve fluid connector with false break preventing function according to any one of claims 2-7, wherein the adapter end connector keeps the locking guide rod in the first position through a relief groove on the front end face of the housing, and a surface of the relief groove, which cooperates with the locking guide rod, has an inclined surface for gradually compressing the locking guide rod during the separation process.

9. The ball valve type fluid connector with the anti-false-breaking function according to claim 8, wherein the connector and the adapter connector are rotationally combined and locked through the cooperation of claws and clamping grooves distributed along the circumferential direction on the front end surface of the shell; the clamping groove comprises a groove for accommodating the clamping jaw and a blocking edge matched with the axial blocking of the clamping jaw, and an inlet for inserting the clamping jaw is formed by the fact that one blocking edge of one side of the clamping groove is missing.

10. The ball valve type fluid connector with the function of preventing false break according to claim 9, wherein two claws, two clamping grooves and two yielding grooves are symmetrically arranged at the front ends of the connector and the adapting connector shell, and the inlet directions of the two clamping grooves are opposite, so that the connector and the adapting connector have two rotatable directions when combined.

11. The ball valve type fluid connector with anti-false break function according to any one of claims 2-7, 9-10, wherein: the end of the valve rod of the ball valve is connected with a handle, and an interlocking system for preventing the handle from rotating by mistake is arranged between the handle and the shell.

12. The ball valve type fluid connector with anti-false break function according to any one of claims 2-7, 9-10, wherein: the shell is axially limited and rotationally connected with the tail accessory through the ball.