On / off valve and fluid connector

Abstract

The utility model discloses a kind of switch valves, including valve body, valve core, accommodating groove and lock bead, further include: lock pin, movable to abutment position to prevent the lock bead exit accommodating groove, and can be movable to unlock position to remove the prevention to the lock bead, to make the valve core can be movable to valve body;Operating pin, can be movable to first position and second position along the intersecting direction with the lock pin activity direction, can when being movable from first position to second position, make the lock pin can be movable to abutment position and prevent the lock pin exit abutment position;And can when being movable from second position to first position, make the lock pin can be movable to unlock position and prevent the lock pin exit unlock position. Above-mentioned switch valve is limited by an operating pin to realize two positions, and then can effectively solve the problem of lock pin and lock bead abutment unreliable. The utility model further discloses a kind of fluid connector comprising above-mentioned switch valve.

Description

Technical Field

[0001] This utility model relates to the field of fluid pipeline connection technology, and more specifically, to a switching valve, and also to a fluid connector including the aforementioned switching valve. Background Technology

[0002] For ball valves, an operating part is generally required for rotating the valve core. The operating part rotates coaxially with the valve core, and the operating part is like a handle.

[0003] For operational safety, a locking pin is typically installed on the handle. This locking pin can move to both a locked and unlocked position. When the locking pin is in the locked position, it abuts against the locking ball on the valve body, directly or indirectly preventing the operating part from rotating relative to the valve body, thus preventing the valve core from rotating. At this time, the valve core is in the closed and / or open position. When the locking pin moves to the unlocked position, it releases the constraint on the locking ball, thereby releasing the restriction on the operating part. However, ensuring the locking pin remains securely and reliably in both the locked and unlocked positions, while maintaining reliability, is quite challenging.

[0004] In the process of realizing this utility model, the inventor discovered that at least the following problems exist in the prior art: how to effectively solve the problem of unreliable contact between the locking pin and the locking ball. Utility Model Content

[0005] In view of this, the first objective of this utility model is to provide a switching valve that can effectively solve the problem of unreliable engagement between the locking pin and the locking ball. The second objective of this utility model is to provide a fluid connector including the above-mentioned switching valve.

[0006] To achieve the first objective mentioned above, this utility model provides the following technical solution:

[0007] A switching valve includes a valve body, a valve core, a receiving groove, and a locking ball. The valve core is movable relative to the valve body to open and close the valve body. When the locking ball is restricted from retracting from the receiving groove, the locking ball directly or indirectly prevents the valve core from moving to open and / or close a communication channel in the valve body. The valve also includes:

[0008] The locking pin is movable to the abutting position to prevent the locking ball from exiting the receiving groove, and is movable to the unlocking position to release the locking ball, so that the valve core can move relative to the valve body;

[0009] The operating pin is movable in a direction intersecting the direction of movement of the locking pin, and is movable to a first position and a second position. When moving from the first position to the second position, it enables the locking pin to move to the abutment position and prevents the locking pin from exiting the abutment position; and when moving from the second position to the first position, it enables the locking pin to move to the unlock position and prevents the locking pin from exiting the unlock position.

[0010] In the aforementioned on / off valve, during use, when unlocking the valve core is required, the operating pin can be moved to the second position to disengage the locking pin from the abutment position and enter the unlock position. At this point, the locking ball is no longer constrained and can exit its receiving groove, thus unlocking the locking ball. Without other constraints, the valve core can move relative to the valve body, and the operating pin prevents the locking pin from disengaging from the unlock position. When it is necessary to restrict the movement of the valve core, the operating pin moves to the first position, allowing the locking pin to enter the abutment position and limiting its movement to prevent it from disengaging. In this on / off valve, the position of the locking pin limits both the abutment and unlock positions, ensuring the stability of the locking pin's position. Furthermore, using a single operating pin to limit both positions simplifies the overall structure and reduces the constraint requirements on the abutment relationship between the locking pin and the locking ball, eliminating the need to consider the direction of the abutment force. In summary, this on / off valve effectively solves the problem of unreliable abutment between the locking pin and the locking ball.

[0011] In some technical solutions, the operating pin has a first limiting part and a second limiting part that are offset along the movement direction of the locking pin, and the first limiting part and the second limiting part are offset along the movement direction of the operating pin; the locking pin has a first limiting surface and a second limiting surface that are disposed opposite to each other;

[0012] Where: L=DW, where L is the moving distance of the locking pin from the abutment position to the unlock position, where D is the distance between the limiting wall surface of the first limiting part and the limiting wall surface of the second limiting part, and where W is the distance between the first limiting surface and the second limiting surface;

[0013] When the operating pin moves to the second position, the first limiting part is located between the first limiting surface and the second limiting surface, and its limiting wall surface abuts against the first limiting surface to prevent the locking pin from disengaging from the abutting position.

[0014] When the operating pin moves to the first position, the second limiting part is located between the first limiting surface and the second limiting surface, and its limiting wall surface abuts against the second limiting surface to prevent the locking pin from disengaging from the unlocking position.

[0015] In some technical solutions, in the direction of movement of the locking pin, the width of the first limiting part and the width of the second limiting part are both equal to the distance between the first limiting surface and the second limiting surface;

[0016] The limiting wall surface of the first limiting part has a first guide slope extending toward the second limiting part at one end near the second limiting part;

[0017] The limiting wall of the second limiting part has a second guide slope extending toward the first limiting part at one end near the first limiting part;

[0018] The first guide slope and the second guide slope are offset from each other in the direction of movement of the operating pin.

[0019] In some technical solutions, the operating pin includes a cylindrical portion, the axial direction of which is consistent with the movement direction of the operating pin; along the movement direction of the locking pin, a portion is removed from one side of a section of the cylindrical portion to form a first limiting portion, and a portion is removed from the other side of another section of the cylindrical portion to form a second limiting portion.

[0020] In some technical solutions, a first elastic device is also included, which abuts against the locking pin to prevent the locking pin from disengaging from the abutment position; and / or, a second elastic device is also included, which abuts against the operating pin to prevent the operating pin from entering the first position.

[0021] In some technical solutions, the locking pin has a slot, and the slot is located away from the two side walls along the sliding direction of the locking pin, which are respectively the first limiting surface and the second limiting surface;

[0022] The locking pin includes a limiting handle portion, and the limiting handle portion has the slots on both opposite sides; the cylindrical portion forms a slot that cooperates with the limiting handle portion, and a first limiting portion and a second limiting portion are formed on both sides of the slot.

[0023] In some technical solutions, a cylindrical hole is provided that mates with the cylindrical portion, and the opening of the cylindrical hole has a plastically deformable locking portion to prevent the operating pin from disengaging from the cylindrical hole.

[0024] In some technical solutions, the receiving groove of the operating handle is disposed in the valve body, and the locking pin and the operating pin are both slidably mounted on the operating handle;

[0025] The operating handle is a plate-shaped structure perpendicular to the rotation axis of the valve core; one side of the locking pin has an abutting slope, and when the locking pin moves to the abutting position, the abutting slope is used to abut against one side of the locking ball to prevent the locking ball from disengaging from the receiving groove; both the locking pin and the operating pin are slidably mounted on the operating handle in a direction perpendicular to the rotation axis of the valve core.

[0026] In some technical solutions, the valve body is provided with an arc-shaped groove, and the two ends of the arc-shaped groove are provided with receiving grooves, so as to correspond to the operation handle being rotated to the closed position when the valve core is closed and to the open position when the valve core is opened, respectively.

[0027] To achieve the second objective mentioned above, this utility model also provides a fluid connector, which includes any of the aforementioned switching valves, with the valve bodies of two of the switching valves rotatably snapped together. Since the aforementioned switching valves possess the above-mentioned technical effects, the fluid connector incorporating these switching valves should also possess corresponding technical effects. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A schematic diagram of the assembly of the pins in the pin group of the switching valve provided in this embodiment of the utility model;

[0030] Figure 2 A schematic diagram illustrating the position changes of each pin group as the locking pin moves from the abutment position to the unlocking position, provided for an embodiment of this utility model;

[0031] Figure 3 A cross-sectional structural diagram of the operating handle (unlocked state) of the switch valve provided in an embodiment of this utility model;

[0032] Figure 4 A schematic diagram of the locking pin provided in an embodiment of this utility model;

[0033] Figure 5 A schematic diagram of the structure of the operating pin provided in an embodiment of this utility model;

[0034] Figure 6 An exploded view of the switching valve provided in an embodiment of this utility model;

[0035] Figure 7A schematic diagram of the structure of the switching valve provided in this embodiment of the utility model;

[0036] Figure 8 A schematic diagram of the structure of the fluid connector provided in an embodiment of this utility model.

[0037] The following labels are shown in the attached diagram:

[0038] 1. Valve body; 2. Valve core; 3. Locking ball; 4. Locking pin; 5. Second elastic device; 6. Operating pin; 7. Operating handle; 8. First elastic device.

[0039] Receiving groove 1-1, connecting channel 1-2, arc-shaped groove 1-3;

[0040] First limiting surface 4-1, second limiting surface 4-2, slot 4-3, limiting handle 4-4, abutting inclined surface 4-5;

[0041] First limiting part 6-1, second limiting part 6-2, first guide slope 6-3, second guide slope 6-4, cylindrical part 6-5, and slot 6-6;

[0042] Locking part 7-1, cylindrical hole 7-2

[0043] Abutment position a, unlock position b;

[0044] First position c, second position d. Detailed Implementation

[0045] This utility model discloses a switching valve to effectively solve the problem of unreliable contact between the locking pin and the locking ball.

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0047] Please see Figures 1-8 , Figure 1 A schematic diagram of the assembly of the pins in the pin group of the switching valve provided in this embodiment of the utility model; Figure 2 A schematic diagram illustrating the position changes of each pin group as the locking pin moves from the abutment position to the unlocking position, provided for an embodiment of this utility model; Figure 3 A cross-sectional structural diagram of the operating handle (unlocked state) of the switch valve provided in an embodiment of this utility model; Figure 4 A schematic diagram of the locking pin provided in an embodiment of this utility model; Figure 5 A schematic diagram of the structure of the operating pin provided in an embodiment of this utility model; Figure 6 An exploded view of the switching valve provided in an embodiment of this utility model; Figure 7 A schematic diagram of the structure of the switching valve provided in this embodiment of the utility model; Figure 8 A schematic diagram of the structure of the fluid connector provided in an embodiment of this utility model.

[0048] In some embodiments, a switching valve is provided, which may be a ball valve, a butterfly valve, etc., and mainly includes a valve body 1, a valve core 2, a receiving groove 1-1, a locking ball 3, a locking pin 4, and an operating pin 6.

[0049] The valve body 1 has a connecting channel 1-2. The valve core 2 is movably disposed in the connecting channel 1-2 of the valve body 1 to open and close the connecting channel 1-2. That is, the valve core 2 can move to at least the open position and the closed position. When it moves to the closed position, it is blocked in the connecting channel 1-2. When it moves to the open position, it can make the two ends of the connecting channel 1-2 open, such as opening the connecting channel 1-2 or connecting its own through hole between the two ends of the connecting channel 1-2. The movement mode of the valve core 2 is not required. It can be opened by rotation or by translation and sliding. The specific opening method can be set according to the needs. The switching valve can be used as a connector of a fluid connector. In this case, one side of the valve body 1 has a connecting part to form a detachable connection with the valve body 1 of another switching valve. As shown in the figure, the valve bodies 1 of the two switching valves are rotated and snapped together. As shown in the figure, when the switching valve is a ball valve, the valve core 2 is spherical or nearly spherical and is installed in the valve body 1 around one of its own axes.

[0050] The receiving groove 1-1 and the locking ball 3 are configured to form a combined locking structure. The locking ball 3's ability to roll out of the receiving groove 1-1 determines whether the valve core 2 can be unlocked or locked. Specifically, when the locking ball 3 is restricted from rolling out of the receiving groove 1-1, it can directly or indirectly prevent the valve core 2 from opening and / or closing the connecting channel 1-2 in the valve body 1. It is understood that the locking ball 3 can be used only when opening or closing the connecting channel 1-2 to control the valve core 2's movement, or it can be used for both opening and closing the connecting channel 1-2. Specific locking methods can refer to existing technologies or are as shown in the attached diagram. Between the valve body 1 and the valve core 2 or its linkage, one has a receiving groove 1-1, and the other has a structure for mounting the locking ball 3 so that the locking ball 3 can extend movably into the receiving groove 1-1. When the receiving groove 1-1 and the locking ball 3 are respectively located between the valve body 1 and the valve core 2, they directly prevent the valve core 2 from moving. When the receiving groove 1-1 and the locking ball 3 are respectively located between the valve body 1 and the valve core 2 linkage, they indirectly prevent the valve core 2 from moving. It should be noted that the valve core 2 linkage refers to a structural component that moves synchronously with the valve core 2. This valve core 2 linkage can be: fixedly connected to the valve core 2, such as the operating handle 7 shown in the attached figure; or it can be driven by the valve core 2, such as through a gear transmission.

[0051] When the locking ball 3 is restricted from rolling out of the receiving groove 1-1, the locking ball 3 achieves a limit, directly or indirectly preventing the valve core 2 from moving. Taking the attached figure as an example, the valve body 1 is provided with a receiving groove 1-1, and the locking ball 3 is set in the corresponding hole of the operating handle 7, which can be exposed and retracted into the corresponding hole. When the corresponding hole is aligned with the receiving groove 1-1, the locking ball 3 can be exposed to enter the receiving groove 1-1. At this time: if the locking ball 3 is prevented from retracting, that is, if the locking ball 3 is prevented from exiting the receiving groove 1-1, the locking ball 3 abuts against the groove wall of the receiving groove 1-1 and the wall of the corresponding hole, preventing the operating handle 7 from rotating relative to the valve body 1. When the restriction is released, as the handle is rotated, the wall of the corresponding hole or other structures can push the locking ball 3 to move out of the receiving groove 1-1, that is, at this time the locking ball 3 retracts, so that the operating handle 7 can rotate relative to the valve body 1.

[0052] The locking pin 4 and the operating pin 6 are combined to form a limiting component for limiting the locking ball 3 to facilitate operation. Generally, the locking pin 4 and the operating pin 6 can be movably set on the same structure and are set on the same structure as the locking ball 3. As shown in the attached figure, they are both set on the operating handle 7. The movement mode is generally as shown in the attached figure, which is a sliding fit to form movement. Of course, it can also be a rotational fit to form rotation.

[0053] The locking pin 4 is movable, capable of moving to the abutting position a and the unlocking position b. When the locking ball 3 moves to the abutting position a, it prevents the locking ball 3 from exiting the receiving groove 1-1, for example, by abutting the locking ball 3 on the side away from the receiving groove 1-1, thus preventing the locking ball 3 from detaching from the receiving groove 1-1. When the locking ball 3 moves to the unlocking position b, it is used to release the obstruction of the locking ball 3, and the locking ball 3 no longer prevents the valve core 2 from moving relative to the valve body 1, so that the valve core 2 can move relative to the valve body 1 to achieve opening and closing.

[0054] The operating pin 6 can move in a direction intersecting the movement direction of the locking pin 4, and the operating pin 6 can move to the first position c and the second position d. The intersecting direction is a vertical direction, that is, the movement direction of the operating pin 6 is set perpendicular to the movement direction of the locking pin 4.

[0055] When the operating pin 6 moves from the first position c to the second position d, it enables the locking pin 4 to move to the abutment position a and prevents the locking pin 4 from retracting from the abutment position a. The movement of the locking pin 4 from the unlocked position b to the abutment position a can be achieved by pushing the operating pin 6, in which case the operating pin 6 and the locking pin 4 abut against each other via a first inclined surface, which is tilted relative to the direction of movement of the locking pin 4; alternatively, it can be achieved by pushing the locking pin 4 using other devices such as an elastic device, in which case the operating pin 6 only needs to not obstruct the movement of the locking pin 4 towards the abutment position a.

[0056] When the operating pin 6 moves from the second position d to the first position c, it enables the locking pin 4 to move to the unlocking position b and prevents the locking pin 4 from exiting the unlocking position b. The movement of the locking pin 4 from the abutment position a to the unlocking position b can be achieved by pushing the operating pin 6, in which case the operating pin 6 and the locking pin 4 abut against each other via a second inclined surface, which is tilted relative to the direction of movement of the locking pin 4; alternatively, it can be achieved by pushing the locking pin 4 using other devices such as an elastic device, in which case the operating pin 6 only needs to not obstruct the movement of the locking pin 4 towards the abutment position a. When both the first and second inclined surfaces are provided on the locking pin 4, they are oriented in opposite directions in the direction of movement of the locking pin 4.

[0057] In the aforementioned switching valve, when it is necessary to unlock the valve core 2, the operating pin 6 can be moved to the second position d, causing the locking pin 4 to disengage from the abutment position a and enter the unlocking position b. At this time, the locking ball 3 is no longer constrained and can exit the receiving groove 1-1, thereby unlocking the locking ball 3. Without other constraints, the valve core 2 can move relative to the valve body 1, and the operating pin 6 prevents the locking pin 4 from disengaging from the unlocking position b. When it is necessary to restrict the movement of the valve core 2, the operating pin 6 moves to the first position c, allowing the locking pin 4 to enter the abutment position a, and limiting the locking pin 4 to prevent it from disengaging from abutment position a. In the aforementioned switching valve, the position of the locking pin 4 limits both the abutment position a and the unlocking position b, ensuring the stability of the locking pin 4's position. Furthermore, by using one operating pin 6 to achieve the limiting of both positions, the overall structure is simplified, and the constraint requirements on the abutment relationship between the locking pin 4 and the locking ball 3 are reduced, eliminating the need to consider the direction of the abutment force. In summary, this switching valve can effectively solve the problem of unreliable contact between the locking pin 4 and the locking ball 3.

[0058] In some embodiments, the operating pin 6 may have a first limiting portion 6-1 and a second limiting portion 6-2, and the locking pin 4 may be correspondingly provided with a first limiting surface 4-1 and a second limiting surface 4-2, to respectively engage with the first limiting portion 6-1 and the second limiting portion 6-2. Specifically, when the operating pin 6 moves to the second position d, the first limiting portion 6-1 is located between the first limiting surface 4-1 and the second limiting surface 4-2, and its limiting wall surface abuts against the first limiting surface 4-1, thereby preventing the locking pin 4 from disengaging from the abutment position a; when the operating pin 6 moves to the first position c, the second limiting portion 6-2 is located between the first limiting surface 4-1 and the second limiting surface 4-2, and its limiting wall surface abuts against the second limiting surface 4-2, thereby preventing the locking pin 4 from disengaging from the unlocking position b.

[0059] The specific arrangement of the first limiting part 6-1 and the second limiting part 6-2, as well as their contact relationship with the limiting surface, is not limited and can be set as needed. For example, the first limiting surface 4-1 and the second limiting surface 4-2 can be set opposite to each other or coplanar, in which case the first limiting part 6-1 and the second limiting part 6-2 are set correspondingly.

[0060] As shown in the attached figure, in a specific example, the first limiting surface 4-1 and the second limiting surface 4-2 are arranged opposite to each other. Specifically, the operating pin 6 can have a first limiting part 6-1 and a second limiting part 6-2 that are offset along the movement direction of the locking pin 4, wherein the first limiting part 6-1 and the second limiting part 6-2 are arranged offset along the movement direction of the operating pin 6.

[0061] Furthermore, at this point, L = DW, where L is the distance the locking pin 4 moves from the abutment position a to the unlocking position b, D is the distance between the limiting wall surface of the first limiting part 6-1 and the limiting wall surface of the second limiting part 6-2, and W is the distance between the first limiting surface 4-1 and the second limiting surface 4-2. This ensures that from the point where the limiting wall surface of the first limiting part 6-1 abuts against the first limiting surface 4-1, to the point where the limiting wall surface of the second limiting part 6-2 abuts against the second limiting surface 4-2, the locking pin 4 can move from the abutment position a to the unlocking position b.

[0062] The above arrangement simplifies the structure of the locking pin 4. At this time, the locking pin 4 can be arranged with the limiting wall of the first limiting part 6-1 and the limiting wall of the second limiting part 6-2 respectively away from the two sides.

[0063] In some embodiments, the widths of the first limiting portion 6-1 and the second limiting portion 6-2 in the direction of movement of the locking pin 4 can both be equal to the distance between the first limiting surface 4-1 and the second limiting surface 4-2. This configuration improves both the width of the first limiting portion 6-1 and the second limiting portion 6-2 to ensure strength and makes the locking pin 4 more stable in its position at the abutment position a and the unlocking position b, preventing it from wobbling.

[0064] To facilitate implementation and compress space in the direction of movement of the operating pin 6, it is preferable that the limiting wall of the first limiting part 6-1 has a first guide slope 6-3 extending toward the second limiting part 6-2 at the end near the second limiting part 6-2; correspondingly, the limiting wall of the second limiting part 6-2 has a second guide slope 6-4 extending toward the first limiting part 6-1 at the end near the first limiting part 6-1.

[0065] The first guide slope 6-3 and the second guide slope 6-4 are offset from each other in the direction of movement of the operating pin 6. Specifically, when the operating pin 6 moves from the first position c to the second position d, the second limiting surface 4-2 and the second limiting part 6-2 first disengage from each other, then the second guide slope 6-4 disengages from the second slope, and then the first guide slope 6-3 abuts against the first slope to push the operating pin 6 from the unlocking position b to the abutting position a (this can also be achieved by an elastic device), and then continues to move so that the first limiting part 6-1 abuts against the first limiting surface 4-1.

[0066] When the operating pin 6 moves from the second position d to the first position c, the first limiting surface 4-1 and the first limiting part 6-1 first disengage from each other, then the first guide slope 6-3 disengages from the first slope, and then the second guide slope 6-4 abuts against the second slope, so as to push the operating pin 6 from the unlocking position b to the abutting position a (at this time, it can also be achieved by the elastic device), and then continue to move so that the second limiting part 6-2 abuts against the second limiting surface 4-2.

[0067] By using guide ramps to guide the movement, the pushing action can be better achieved. Since the first guide ramp 6-3 and the second guide ramp 6-4 are offset in the direction of movement of the operating pin 6, they can be connected or separated in the direction of movement of the operating pin 6. The connection is more compact. The above arrangement can better ensure that the width of the first limiting part 6-1 and the second limiting part 6-2 is larger, thereby improving the strength.

[0068] In some embodiments, the operating pin 6 may include a cylindrical portion 6-5, the axis of which is aligned with the direction of movement of the operating pin 6, to facilitate sliding installation. In this case, the mounting hole of the operating pin 6 is also easier to machine. Other structures are formed by slotting 4-3 and removing material from the cylindrical portion 6-5.

[0069] Along the movement direction of the locking pin 4, a portion is removed from one side of one section of the cylindrical portion 6-5 to form the first limiting portion 6-1, and a portion is removed from the other side of the other section of the cylindrical portion 6-5 to form the second limiting portion 6-2. Because they are in different sections, the first limiting portion 6-1 and the second limiting portion 6-2 can be misaligned in the axial direction. In the movement direction of the locking pin 4, a portion is removed from each of the opposite sides so that the remaining portions are offset in the radial direction, that is, offset in the movement direction of the locking pin 4, so that the first limiting portion 6-1 and the second limiting portion 6-2 are offset in the movement direction of the locking pin 4.

[0070] By slotting the cylindrical part 6-5 through 4-3 and removing some structures to facilitate processing, the mounting hole for the locking pin 4 can be generated by drilling the cylindrical hole 7-2, making the overall structure processing simpler.

[0071] In some embodiments, to prevent the locking pin 4 from wobbling, a first elastic device 8 can be provided, which abuts against the locking pin 4 to prevent the locking pin 4 from disengaging from the abutment position a. Specifically, the first elastic device 8 can be disposed between the aforementioned encapsulation member and the locking pin 4. The first elastic device 8 can be a spring or other elastic structure. When it is a spring, it can be sleeved on the outer end of the locking pin 4 and abut against the shoulder at the outer end of the locking pin 4 to maintain the stability of the overall structure.

[0072] In some embodiments, a second elastic device 5 is further included to abut against the operating pin 6 to prevent the operating pin from entering the first position c, so as to facilitate pushing the operating pin 6 to reset. The second elastic device 5 can be installed at the bottom of the mounting hole, and the operating pin 6 can be provided with a slot for cooperating with the end of the second elastic device 5 to better guide the deformation of the second elastic device 5.

[0073] The device is equipped with a first elastic device 8 and a second elastic device 5. Its operation is as follows: When it is necessary to unlock the locking pin 4, the operating pin 6 is operated to overcome the deformation force of the second elastic device 5, moving from the second position d to the first position c, causing the locking pin 4 to disengage from the abutment position a and enter the unlocked position b, thus unlocking the locking pin 4. When it is necessary to lock, the operating pin 6 is released. Under the force of the second elastic device 5, the operating pin 6 moves in the opposite direction, moving from the first position c to the second position d. Under the force of the operating pin 6 and / or the first elastic device 8, the locking pin 4 moves in the opposite direction, moving from the unlocked position b to the abutment position a, and is then limited.

[0074] In some embodiments, in order to facilitate the provision of the first limiting surface 4-1 and the second limiting surface 4-2, the locking pin 4 may have a slot 4-3, wherein the slot 4-3 is located away from the two side slot walls along the sliding direction of the locking pin 4, and is respectively the first limiting surface 4-1 and the second limiting surface 4-2. In order to facilitate the guidance of the first limiting part 6-1 and the second limiting part 6-2 into the lock, both the first limiting surface 4-1 and the second limiting surface 4-2 are provided with inclined surfaces, namely the first inclined surface and the second inclined surface.

[0075] Considering size limitations, it is generally better for the center planes of operating pin 6 and locking pin 4 to be as close as possible, and they can even be located on the same plane. The most stable operation is achieved when the center of force of operating pin 6 and locking pin 4 is at their center planes.

[0076] Based on this, the locking pin 4 preferably includes a limiting handle 4-4, with slots 4-3 on both sides opposite to each other; this creates a groove 6-6 that engages with the limiting handle 4-4. The operating pin 6 has a first limiting part 6-1 and a second limiting part 6-2 on both sides of the groove 6-6, as well as limiting surfaces corresponding to the slots 4-3 on both sides. At this point, the force centers of the operating pin 6 and the locking pin 4 are both at or closer to the center plane, resulting in a more even and stable force distribution across the various structures.

[0077] In some embodiments, a cylindrical hole 7-2 may be provided to mate with the cylindrical portion 6-5. The opening of the cylindrical hole 7-2 has a plastically deformable locking portion 7-1 to prevent the operating pin 6 from disengaging from the cylindrical hole 7-2, thereby completing the installation of the operating pin 6. The above installation method is simple to install and convenient to operate. The locking pin 4 is provided laterally through the cylindrical hole 7-2, and the first limiting surface 4-1 and the second limiting surface 4-2 on the locking pin 4 are respectively located on both sides of the cylindrical hole 7-2. Specifically, as shown in the figure, the groove wall of the cylindrical hole 7-2 may be provided with a sliding hole, the outer end of which extends to the side of the operating handle 7, and the inner end extends to the corresponding hole of the corresponding locking bead 3. An encapsulation component is provided at the outer end of the sliding hole.

[0078] An annular shoulder is provided at the outer end of the cylindrical part 6-5. The annular shoulder is used to abut against the inner side of the locking part 7-1 to achieve a limiting position.

[0079] Alternatively, the locking part 7-1 can be integrated into a cover plate, and the cover plate can be detachably and fixedly connected to the component with the cylindrical hole 7-2.

[0080] In some embodiments, the receiving groove 1-1 is provided on the valve body 1, and the locking pin 4 and the operating pin 6 are slidably installed on the operating handle 7 to facilitate the use of the handle lock. In this case, the operating pin 6 can be a pressing pin, so that when the handle needs to be opened, the user needs to press the operating pin 6.

[0081] Alternatively, the receiving groove 1-1 can be located on the valve core 2 or the operating handle 7, while the locking pin 4 and the operating pin 6 are slidably mounted on the valve body 1. The operating pin 6 moves along the docking direction of the valve body 1 so that it is triggered when docking with the valve body 1 of other switching valves. When there is no docking with a valve body 1, it prevents the valve core 2 from opening, thus avoiding accidental opening. The entire locking assembly can be called an end face lock.

[0082] In some embodiments, to make the structure more compact, the operating handle is generally a plate-shaped structure perpendicular to the rotation axis of the valve core 2. To accommodate the installation of the plate-shaped structure and to ensure strength as much as possible, one side of the locking pin 4 can have an abutment slope 4-5. When the locking pin 4 moves to the abutment position a, the abutment slope 4-5 is used to abut against one side of the locking ball 3 to prevent the locking ball 3 from disengaging from the receiving groove 1-1, so as to compress the space as much as possible in the thickness direction of the operating handle 7. With the above arrangement, when the locking ball 3 retracts, the locking ball 3 can move back as far as possible to approach the other side plate surface. At this time, the diameter of the locking ball 3 can be larger, thereby ensuring strength.

[0083] Specifically, one side of the operating handle 7 in the thickness direction is the inner plate, which is set close to the valve body 1, while the other side in the thickness direction is the outer plate. The inner plate has corresponding holes so that the locking ball 3 can be exposed on the inner side of the inner plate. The abutting slope 4-5 of the locking pin 4 is located outside the locking ball 3 when it abuts, and is located on the side of the locking ball 3 in the sliding direction of the locking pin 4, so that the locking ball 3 and the locking pin 4 are as overlapping as possible in the inner and outer directions, thereby reducing the thickness dimension of the operating handle 7.

[0084] At this time, both the locking pin 4 and the operating pin 6 can be slidably installed on the operating handle in a direction perpendicular to the rotation axis of the valve core 2, that is, the movement direction of the locking pin 4 and the operating pin 6 is perpendicular to the thickness direction of the operating handle 7.

[0085] In some embodiments, the valve body 1 may be provided with an arc-shaped groove 1-3, wherein both ends of the arc-shaped groove 1-3 are provided with receiving grooves 1-1, corresponding to the operation handle 7 being rotated to the closed position when the valve core 2 is closed and to the open position when the valve core 2 is open, respectively. This ensures that when the operation handle 7 is rotated to the closed position of the valve core 2, one receiving groove 1-1 is opposite to the locking ball 3; and when the operation handle 7 is rotated to the open position of the valve core 2, another receiving groove 1-1 is opposite to the locking ball 3.

[0086] Based on the switching valves provided in the above embodiments, this utility model also provides a fluid connector, which includes any one of the switching valves in the above embodiments, with the valve bodies 1 of the two switching valves rotatably snapped together. Since this fluid connector uses the switching valves in the above embodiments, the beneficial effects of this fluid connector can be found in the above embodiments. The rotatable snap-fit ​​refers to a snap-fit ​​achieved through rotation.

[0087] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0088] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A switching valve, comprising a valve body (1), a valve core (2), a receiving groove (1-1), and a locking ball (3), wherein the valve core (2) is movable relative to the valve body (1) to open and / or close a communicating channel (1-2) in the valve body (1), and the locking ball (3) directly or indirectly prevents the valve core (2) from moving when it is prevented from exiting the receiving groove (1-1); characterized in that, Also includes: The locking pin (4) is movable to the abutment position (a) to prevent the locking ball (3) from exiting the receiving groove (1-1), and is movable to the unlock position (b) to release the obstruction of the locking ball (3) so that the valve core (2) can move relative to the valve body (1); The operating pin (6) is movable in a direction intersecting the direction of movement of the locking pin (4), and is movable to a first position (c) and a second position (d). When it moves from the first position (c) to the second position (d), it enables the locking pin (4) to move to the abutment position (a) and prevents the locking pin (4) from exiting the abutment position (a); and when it moves from the second position (d) to the first position (c), it enables the locking pin (4) to move to the unlock position (b) and prevents the locking pin (4) from exiting the unlock position (b).

2. The switching valve according to claim 1, characterized in that, The operating pin (6) has a first limiting part (6-1) and a second limiting part (6-2) that are offset along the movement direction of the locking pin (4), and the first limiting part (6-1) and the second limiting part (6-2) are offset along the movement direction of the operating pin (6); the locking pin (4) has a first limiting surface (4-1) and a second limiting surface (4-2) that are opposite to each other. Where: L=DW, where L is the moving distance of the locking pin (4) from the abutment position (a) to the unlocking position (b), where D is the distance between the limiting wall surface of the first limiting part (6-1) and the limiting wall surface of the second limiting part (6-2), and where W is the distance between the first limiting surface (4-1) and the second limiting surface (4-2); When the operating pin (6) moves to the second position (d), the first limiting part (6-1) is located between the first limiting surface (4-1) and the second limiting surface (4-2) and its limiting wall surface abuts against the first limiting surface (4-1) to prevent the locking pin (4) from disengaging from the abutment position (a). When the operating pin (6) moves to the first position (c), the second limiting part (6-2) is located between the first limiting surface (4-1) and the second limiting surface (4-2) and its limiting wall surface abuts against the second limiting surface (4-2) to prevent the locking pin (4) from disengaging from the unlocking position (b).

3. The switching valve according to claim 2, characterized in that, In the direction of movement of the locking pin (4), the width of the first limiting part (6-1) and the width of the second limiting part (6-2) are both equal to the distance between the first limiting surface (4-1) and the second limiting surface (4-2); The limiting wall of the first limiting part (6-1) has a first guide slope (6-3) extending toward the second limiting part (6-2) at one end near the second limiting part (6-2). The limiting wall of the second limiting part (6-2) has a second guide slope (6-4) extending toward the first limiting part (6-1) at one end near the first limiting part (6-1). The first guide slope (6-3) and the second guide slope (6-4) are offset from each other in the direction of movement of the operating pin (6).

4. The switching valve according to claim 3, characterized in that, The operating pin (6) includes a cylindrical portion (6-5), the axial direction of which is consistent with the movement direction of the operating pin (6); along the movement direction of the locking pin (4), a portion is removed from one side of a section of the cylindrical portion (6-5) to form the first limiting portion (6-1), and a portion is removed from the other side of another section of the cylindrical portion (6-5) to form the second limiting portion (6-2).

5. The switching valve according to claim 4, characterized in that, It also includes a first elastic device (8) that abuts against the locking pin (4) to prevent the locking pin (4) from disengaging from the abutment position (a); and / or, it also includes a second elastic device (5) that abuts against the operating pin (6) to prevent the operating pin (6) from entering the first position (c).

6. The switching valve according to claim 4, characterized in that, The locking pin (4) has a slot (4-3), and the slot (4-3) is located away from the two side walls along the sliding direction of the locking pin (4), which are respectively the first limiting surface (4-1) and the second limiting surface (4-2). The locking pin (4) includes a limiting handle (4-4), which has the slot (4-3) on both opposite sides; a groove (6-6) is formed on the cylindrical part (6-5) to cooperate with the limiting handle (4-4), and a first limiting part (6-1) and a second limiting part (6-2) are formed on both sides of the groove (6-6).

7. The switching valve according to claim 4, characterized in that, It has a cylindrical hole (7-2) that mates with the cylindrical part (6-5), and the opening of the cylindrical hole (7-2) has a plastically deformable locking part (7-1) to prevent the operating pin (6) from disengaging from the cylindrical hole (7-2).

8. The switching valve according to any one of claims 1-7, characterized in that, It also includes an operating handle (7), the receiving groove (1-1) is disposed on the valve body (1), and the locking pin (4) and the operating pin (6) are slidably mounted on the operating handle (7). The operating handle (7) is a plate-shaped structure perpendicular to the rotation axis of the valve core (2); one side of the locking pin (4) has an abutting slope (4-5). When the locking pin (4) moves to the abutting position (a), the abutting slope (4-5) is used to abut against one side of the locking ball (3) to prevent the locking ball (3) from disengaging from the receiving groove (1-1); the locking pin (4) and the operating pin (6) are both slidably installed on the operating handle (7) in a direction perpendicular to the rotation axis of the valve core (2).

9. The switching valve according to claim 8, characterized in that, The valve body (1) is provided with an arc-shaped groove (1-3), and the two ends of the arc-shaped groove (1-3) are provided with receiving grooves (1-1) respectively, so as to correspond to the operation handle (7) being rotated to the closed position when the valve core (2) is closed and to the open position when the valve core (2) is opened.

10. A fluid connector, characterized in that, Including the switching valve as described in any one of claims 1-9, wherein the valve bodies (1) of the two switching valves are rotatably snapped together.

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