Connector for fluid transmission

Abstract

The invention discloses a connector for fluid transmission, and the connector for fluid transmission comprises a valve body internally provided with a fluid passage, a valve component, an interface end face and a locking mechanism, the interface end face is provided with a screwing part, an interface groove and a pin hole; the locking mechanism comprises a pin, an elastic locking plate and a positioning hole, the pin can selectively and axially move between a retracted position and an extended position in the pin hole, and the pin is operatively connected to the valve component; a part of the elastic locking plate extends into the interface slot, and the elastic locking plate can be selectively switched between a first form and a second form; according to the connector for fluid transmission, when the valve body is not connected with the complementary connector, the elastic locking piece locks the pin at the retraction position, the pin is meshed with the handle, and therefore the handle is fixed at the closing position, and the risk of fluid leakage is reduced.

Description

Technical Field

[0001] The present invention relates to a joint for fluid transmission. Background Art

[0002] A joint is a connecting device used to connect to the ends of fluid transmission pipelines. After the joints located at the ends of two pipelines are docked with complementary joints, the communication of the two pipelines can be achieved.

[0003] Currently, a ball valve is provided inside the joint. By turning the ball valve with a handle, the on-off of the fluid transmission pipeline inside the joint is controlled. A locking device is provided on the handle. The locking device moves synchronously with the handle. The positioning grooves are corresponding to the locking device and are provided on the valve body of the ball valve. There are two positioning grooves. When the locking device moves above the first position or the second position, it can be snapped into the corresponding positioning groove. At this time, the ball valve is in the fully open or fully closed state. The locking device on the handle can be used to avoid accidental touch of the handle and cause misoperation of the ball valve.

[0004] The above device can lock the handle and avoid accidental touch. However, when the joint and the complementary joint are not connected, personnel can still press and operate the handle to unlock it, which increases the risk of accidentally touching the handle and causes fluid leakage. Summary of the Invention

[0005] The object of the present invention is to provide a joint for fluid transmission, including: A valve body having a fluid passage inside; A valve member capable of selectively switching between a closed state that blocks the fluid passage and an open state that does not block the fluid passage; An interface end face, on which a screwing portion, an interface groove, and a pin hole are provided. The valve body can be connected to a complementary joint through the cooperation of the screwing portion and the interface groove; The locking mechanism includes a pin, an elastic lock piece, and a positioning hole. The positioning hole is opened on the interface end face and is parallel to the pin hole. The pin can selectively move axially between a retracted position and an extended position in the pin hole. The pin extends further out of the pin hole in the extended position than in the retracted position. The pin is operatively connected to the valve member, so that when the valve member is in the open position, the pin is in the extended position, and when the valve member is in the closed position, the pin is in the retracted position. A locking groove is provided on the pin; The elastic lock piece is arranged inside the valve body. A part of the elastic lock piece extends into the interface groove. The elastic lock piece can selectively switch between a first form and a second form; When the elastic locking piece is in the first form, a part of the elastic locking piece extends into the interface groove, and the elastic locking piece locks the pin in the retracted position; when the complementary joint is engaged with the valve body on the interface end face, the screwing part of the complementary joint holds the elastic locking piece in the second form, and the locking state of the elastic locking piece on the pin is released.

[0006] Specifically, the valve member includes a ball valve and a handle. The handle is fixedly connected to the ball valve. A through hole is provided on the ball valve. When the handle is in the open position, the through hole is aligned with the fluid passage, and an engagement groove is provided on the handle. An engagement part is provided on the pin, and the engagement part is engaged with the engagement groove so that the pin is operatively connected to the handle. When the handle is in the open position, the pin is in the extended position, and when the handle is in the closed position, the pin is in the retracted position.

[0007] Preferably, the elastic locking piece includes a first mounting piece, a first locking piece and a first spring cylinder. The side edge of the first mounting piece is connected to the side edge of the first locking piece through the first spring cylinder. The first mounting piece is fixedly arranged in the valve body. An installation through hole is provided on the first mounting piece. The first locking piece is movably arranged in the interface groove. A locking through hole is provided on the first locking piece. The inner diameter of the locking through hole is larger than the diameter of the pin. The pin is arranged in the installation through hole and the locking through hole, and the locking groove of the pin is engaged with the inclined locking through hole. Specifically, the elastic locking piece is integrally V-shaped. The first connecting piece, the first locking piece and the first spring cylinder of the elastic locking piece are integrally formed. The structure of the elastic locking piece is such that when the complementary joint is not connected to the valve body on the interface end face, the elastic locking piece is in the first form, and the first locking piece is engaged with the locking groove of the pin through the locking through hole, locking the pin in the retracted position. The structure of the elastic locking piece is such that after the complementary joint is connected to the valve body on the interface end face, the screwing part of the complementary joint presses the first locking piece to make the first locking piece return to the normal position, keeping the elastic locking piece in the second form, and the locking state of the locking through hole on the pin is released.

[0008] Preferably, the elastic locking piece includes a second mounting piece, a second locking piece and a second spring cylinder. The second mounting piece is fixedly arranged in the valve body. The upper end of the second locking piece is connected to the second mounting piece through the second spring cylinder. The lower end of the second locking piece extends into the interface groove, and a part of the second locking piece is clamped in the locking groove of the pin.

[0009] Specifically, the elastic locking piece is integrally V-shaped. The second connecting piece, the second locking piece and the second cartridge of the elastic locking piece are integrally formed. The structure of the elastic locking piece is such that when the complementary joint is not connected to the valve body on the interface end face, the elastic locking piece is in the first form, and the second locking piece is clamped in the locking groove of the pin, locking the pin in the retracted position; The structure of the elastic locking piece is such that after the complementary joint is connected to the valve body on the interface end face, the screwing part of the complementary joint presses the second locking piece, causing the second locking piece to disengage from the locking groove, keeping the elastic locking piece in the second form, and releasing the locking state of the second locking piece on the pin.

[0010] The advantages and beneficial effects of the present invention are as follows: A joint for fluid transmission is provided. When the valve body and the complementary joint are not connected, the elastic locking piece locks the pin in the retracted position, and the pin meshes with the handle, so that the handle is fixed in the closed position; moreover, the handle cannot be rotated when the valve body and the complementary joint are not connected in place, and the connection between the valve body and the complementary joint cannot be disconnected when the handle is not fully closed, thus greatly reducing the risk of fluid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of the present invention.

[0012] Figure 2 is a schematic diagram of the interface end face in the present invention.

[0013] Figure 3 is a partial schematic diagram of the locking mechanism in Embodiment 1 of the present invention.

[0014] Figure 4 is a schematic diagram of the elastic locking piece in Embodiment 1 of the present invention.

[0015] Figure 5 is a partial schematic diagram of the locking mechanism in Embodiment 2 of the present invention..

[0016] Figure 6 is a schematic diagram of the elastic locking piece in Embodiment 2 of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] The following further describes the specific embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0018] The technical solution specifically implemented by the present invention is as follows: As Figure 1 and Figure 2 shown, a joint for fluid transmission includes: A valve body 1 with a fluid passage 3 inside; A valve member 2 capable of selectively switching between a closed state that blocks a fluid passage and an open state that does not block the fluid passage; An interface end face 4, on which a screwing portion 41, an interface groove 42 and a pin hole 43 are provided, and the valve body 1 can be connected to a complementary joint by the cooperation of the screwing portion 41 and the interface groove 42; The locking mechanism 5 includes a pin 51, an elastic locking piece 52 and a positioning hole 53. The positioning hole 53 is provided on the interface end face 4. The positioning hole 53 is parallel to the pin hole 43. The pin 51 can selectively move axially between a retracted position and an extended position within the pin hole 43. The pin 51 extends further out of the pin hole 43 in the extended position than in the retracted position. The pin 51 is operatively connected to the valve member 2, so that when the valve member 2 is in the open position, the pin 51 is in the extended position, and when the valve member 5 is in the closed position, the pin 51 is in the retracted position. A locking groove 513 is provided on the pin 51; The elastic locking piece 52 is arranged within the valve body 1. A part of the elastic locking piece 52 extends into the interface groove 42. The elastic locking piece 52 can selectively switch between a first form and a second form; When the elastic locking piece 52 is in the first form, a part of the elastic locking piece 52 extends into the interface groove 42, and the elastic locking piece 52 locks the pin 51 in the retracted position; when the complementary joint is engaged with the valve body 1 on the interface end face 4, the screwing portion 41 of the complementary joint holds the elastic locking piece 52 in the second form, and the locking state of the elastic locking piece 52 on the pin 51 is released.

[0019] Such as Figure 3 and Figure 5 As shown, the above valve member 2 includes a ball valve 21 and a handle 22. The handle 22 is fixedly connected to the ball valve 21. A through hole 23 is provided on the ball valve 21. When the handle 22 is in the open position, the through hole 23 is aligned with the fluid passage 3. A meshing groove 221 is provided on the handle 22; A meshing portion 511 is provided on the above pin 51. The meshing portion 511 meshes with the meshing groove 221, so that the pin 51 is operatively connected to the handle 22. When the handle 22 is in the open position, the pin 51 is in the extended position, and when the handle 22 is in the closed position, the pin 51 is in the retracted position.

[0020] In the first embodiment, as Figure 3 and Figure 4As shown, the above-mentioned elastic locking piece 52 includes a first mounting piece 521, a first locking piece 522 and a first elastic cylinder 523. The side of the first mounting piece 521 is connected to the side of the first locking piece 522 through the first elastic cylinder 523. The first mounting piece 521 is fixedly arranged in the valve body 1. An installation through hole 5211 is provided on the first mounting piece 521. The first locking piece 522 is movably arranged in the interface groove 42. A locking through hole 5221 is provided on the first locking piece 522. The pin 51 is inserted through the installation through hole 5211 and the locking through hole 5221. The locking groove 513 of the pin 51 is engaged with the inclined locking through hole 5221.

[0021] The above-mentioned elastic locking piece 52 is integrally V-shaped. The first connecting piece 521, the first locking piece 522 and the first elastic cylinder 523 of the elastic locking piece 52 are integrally formed. The structure of the elastic locking piece 52 is such that when the complementary joint is not connected to the valve body 1 on the interface end face 4, the elastic locking piece 52 is in the first state. The first locking piece 522 is engaged with the locking groove 513 of the pin 51 through the locking through hole 5221, locking the pin 51 in the retracted position. The structure of the above-mentioned elastic locking piece 52 is such that after the complementary joint is connected to the valve body 1 on the interface end face 4, the screwing part 41 of the complementary joint presses the first locking piece 522, making the first locking piece 522 return to the normal position, keeping the elastic locking piece 52 in the second state. The locking through hole 5221 exits from the locking groove 513 and is sleeved on the pin 51 again, and the locking state of the first locking piece 522 on the pin 51 is released.

[0022] During use, when the valve body 1 and the complementary joint are not connected, the handle 22 is in the closed position, and the pin 51 is retracted into the valve body 1. The locking hole elastic piece 52 is also located inside the valve body 1. The pin 51 is inserted through the installation through hole 5211 and the locking through hole 5221 of the first connecting piece 521. Due to the inclination of the first locking piece 522, the locking through hole 5221 is inclined and engaged with the locking groove 513 of the pin 51. The first locking piece 522 locks the pin 51. Since the engaging part 511 of the pin 51 is engaged with the engaging groove 221 of the handle 22, the handle 22 is locked accordingly. When the valve body 1 is in the unconnected state, the handle 22 is in the closed position and locked, preventing fluid leakage.

[0023] When the valve body is connected to the complementary joint, the screwing part 41 of a valve body 1 is rotationally clamped within the interface groove 42 of the complementary joint. During the rotation process, the screwing part 41 pushes the first locking piece 522 within the complementary joint towards the first connecting piece 521, causing elastic deformation of the first spring cylinder 523. The locking through hole 5221 on the first locking piece 522 returns to its original position, and the locking through hole 5221 withdraws from the locking groove 513 and is sleeved on the pin 51 again. The locking state of the first locking piece 522 on the pin 51 is released. At this time, the handle 22 can be rotated. By rotating the handle 22, the valve ball 21 is driven to rotate, thereby opening the valve body 1. During the rotation of the handle 22, the engaging groove 221 and the engaging part 511 cooperate with each other to drive the pin 51 to move, so that the pin 51 extends into the positioning hole 53 of the complementary joint to position the valve body 1 and the complementary joint.

[0024] In the second embodiment, as Figure 5 and Figure 6 shown, the above-mentioned elastic locking piece 52 includes a second mounting piece 524, a second locking piece 525, and a second spring cylinder 526. The second mounting piece 524 is fixedly arranged within the valve body 1. The upper end of the second locking piece 525 is connected to the second mounting piece 524 through the second spring cylinder 526. The lower end of the second locking piece 525 extends into the interface groove 42, and a part of the second locking piece 525 is clamped within the locking groove 513 of the pin 51.

[0025] Specifically, the above-mentioned elastic locking piece 52 is integrally V-shaped. The second connecting piece 524, the second locking piece 525, and the second spring cylinder 526 of the elastic locking piece 52 are integrally formed. The structure of the elastic locking piece 52 is such that when the complementary joint is not connected to the valve body 1 on the interface end face 4, the elastic locking piece 52 is in the first state, and the second locking piece 525 is clamped within the locking groove 513 of the pin 51 to lock the pin 513 in the retracted position. The structure of the above-mentioned elastic locking piece 52 is such that after the complementary joint is connected to the valve body 1 on the interface end face 4, the screwing part 41 of the complementary joint presses the second locking piece 525, causing the second locking piece 525 to disengage from the locking groove 513, keeping the elastic locking piece 52 in the second state, and releasing the locking state of the second locking piece 525 on the pin 51.

[0026] During use, when the valve body 1 and the complementary joint are not connected, the handle 22 is in the closed position, and the pin 51 is retracted into the interior of the valve body 1. The elastic locking piece 52 is fixed inside the valve body 1 through the second connecting piece 524, and the second locking piece 525 is clamped within the locking groove 513 of the pin 51 to lock the pin 51. Since the engaging part 511 of the pin 51 is engaged with the engaging groove 221 of the handle 22, the handle 22 is locked. When the valve body 1 is in the unconnected state, the handle 22 is in the closed position and locked to prevent fluid leakage.

[0027] When the valve body 1 is connected to the complementary joint, the screwing part 41 of the valve body 1 rotates and engages within the interface groove 42 of the complementary joint. During the rotation process, the screwing part 41 pushes the bottom of the second locking piece 525 within the complementary joint, causing the second locking piece 525 to move closer to the second connecting piece 524 with the second cartridge 526 as the center. The second cartridge 526 undergoes elastic deformation, and the second locking piece 525 disengages from the locking groove of the pin 51. At this time, the pin 51 is released from the locked state, and then the handle 22 can be rotated. By rotating the handle 22, the valve ball 21 is driven to rotate, thereby opening the valve body 1. Moreover, during the rotation of the handle 22, the engaging groove 221 and the engaging part 511 cooperate with each other to drive the pin 51 to move, causing the pin 51 to extend into the positioning hole 53 on the other complementary joint to position the valve body 1 and the complementary joint. When the valve body 1 is not properly connected to the complementary joint, the positioning hole 53 on one valve body 1 is not aligned with the pin 51 on the complementary joint. At this time, the complementary joint 51 cannot extend into the positioning hole 53, and further, the handle 22 and the valve ball 21 cannot rotate, preventing the valve body 1 from being opened when the connection between the valve body 1 and the complementary joint is not in place, which may cause fluid leakage. Finally, when the valve body 1 is not closed or not fully closed (i.e., the handle 22 is not in the closed position), at this time, the pin 51 is not fully retracted into the valve body 1 either, resulting in the pin 51 extending completely or partially into the positioning hole 53 on the complementary joint. At this time, rotation cannot occur between the valve body 1 and the complementary joint. Only after the valve body 1 is fully closed can rotation occur between the valve body 1 and the complementary joint to disconnect the connection, avoiding fluid leakage caused by disconnecting the connection when the valve body 1 is not closed or not fully closed.

[0028] A joint for fluid transmission according to the present invention can not only lock the handle 22 when the valve body is not connected to the complementary joint, but also prevent the handle 22 from being opened when the valve body is not properly connected to the complementary joint, and further prevent the connection between the valve body and the complementary joint from being disconnected when the handle 22 is not fully closed, thereby greatly reducing the risk of fluid leakage.

[0029] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A connector for fluid transmission, characterized in that, Comprising: A valve body having a fluid passage therein; A valve member capable of selectively switching between a closed state blocking the fluid passage and an open state not blocking the fluid passage; An interface end face provided with a screwing portion, an interface groove and a pin hole thereon, and the valve body can be connected to a complementary joint through the cooperation of the screwing portion and the interface groove; The locking mechanism includes a pin, an elastic locking piece and a positioning hole. The positioning hole is opened on the interface end face and is parallel to the pin hole. The pin can selectively move axially between a retracted position and an extended position in the pin hole. The pin extends further out of the pin hole in the extended position than in the retracted position. The pin is operatively connected to the valve member, so that when the valve member is in the open position, the pin is in the extended position, and when the valve member is in the closed position, the pin is in the retracted position. A locking groove is provided on the pin; The elastic locking piece is arranged in the valve body, and a part of the elastic locking piece extends into the interface groove, and the elastic locking piece can selectively switch between a first form and a second form; When the elastic locking piece is in the first form, a part of the elastic locking piece extends into the interface groove, and the elastic locking piece locks the pin in the retracted position; when the complementary joint is engaged with the valve body on the interface end face, the screwing portion of the complementary joint holds the elastic locking piece in the second form, and the locking state of the elastic locking piece on the pin is released.

2. The joint for fluid transmission according to claim 1, characterized in that, The valve member includes a ball valve and a handle. The handle is fixedly connected to the ball valve. A through hole is provided on the ball valve. When the handle is in the open position, the through hole is aligned with the fluid passage. A meshing groove is provided on the handle; A meshing portion is provided on the pin, and the meshing portion meshes with the meshing groove, so that the pin is operatively connected to the handle. When the handle is in the open position, the pin is in the extended position, and when the handle is in the closed position, the pin is in the retracted position.

3. The joint for fluid transmission according to claim 2, characterized in that, The elastic locking piece includes a first mounting piece, a first locking piece and a first spring cylinder. The side edge of the first mounting piece is connected to the side edge of the first locking piece through the first spring cylinder. The first mounting piece is fixedly arranged in the valve body. An installation through hole is provided on the first mounting piece. The first locking piece is movably arranged in the interface groove. A locking through hole is provided on the first locking piece. The inner diameter of the locking through hole is larger than the diameter of the pin. The pin passes through the installation through hole and the locking through hole. The locking groove of the pin is engaged with the inclined locking through hole in a clamping manner.

4. The joint for fluid transmission according to claim 3, characterized in that, The elastic locking piece is integrally V-shaped. The first connecting piece, the first locking piece and the first spring cylinder of the elastic locking piece are integrally formed. The structure of the elastic locking piece is such that when the complementary joint is not connected to the valve body on the interface end face, the elastic locking piece is in the first form, and the first locking piece is clamped with the locking groove of the pin through the locking through hole, locking the pin in the retracted position; The structure of the elastic locking piece is such that when the complementary joint is connected to the valve body on the interface end face, the screwing portion of the complementary joint presses the first locking piece, causing the first locking piece to return to the normal position, keeping the elastic locking piece in the second form. The locking through hole exits from the locking groove and is sleeved on the pin again, and the locking state of the first locking piece on the pin is released.

5. The connector for fluid transmission according to claim 2, characterized in that, The elastic locking piece includes a second mounting piece, a second locking piece and a second elastic cylinder. The second mounting piece is fixedly arranged in the valve body. The upper end of the second locking piece is connected to the second mounting piece through the second elastic cylinder. The lower end of the second locking piece extends into the interface groove, and a part of the second locking piece is clamped in the locking groove of the pin.

6. The joint for fluid transmission according to claim 5, characterized in that, The elastic locking piece is integrally V-shaped. The second connecting piece, the second locking piece and the second elastic cylinder of the elastic locking piece are integrally formed. The structure of the elastic locking piece is such that when the complementary joint is not connected to the valve body on the interface end face, the elastic locking piece is in the first form, and the second locking piece is clamped in the locking groove of the pin to lock the pin in the retracted position. The structure of the elastic locking piece is such that after the complementary joint is connected to the valve body on the interface end face, the screwing part of the complementary joint presses the second locking piece, causing the second locking piece to disengage from the locking groove, keeping the elastic locking piece in the second form, and releasing the locking state of the second locking piece on the pin.

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