CN215334616U - DBB forced sealing ball valve driving structure - Google Patents
DBB forced sealing ball valve driving structure Download PDFInfo
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- CN215334616U CN215334616U CN202121752100.1U CN202121752100U CN215334616U CN 215334616 U CN215334616 U CN 215334616U CN 202121752100 U CN202121752100 U CN 202121752100U CN 215334616 U CN215334616 U CN 215334616U
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Abstract
The utility model relates to a DBB forced sealing ball valve driving structure which comprises a valve core (10), wherein the valve core is provided with a flow channel (11), a first valve clack driving piece (20) and a second valve clack driving piece (30) are respectively arranged on two sides of the flow channel, the first valve clack driving piece and the second valve clack driving piece drive a sealing valve clack (40) to be pressed against or separated from a valve seat (81), the first valve clack driving piece and the second valve clack driving piece are provided with valve clack guide grooves (M1), the sealing valve clack is provided with a valve clack guide rail (M2) in sliding fit with the valve clack guide grooves, the first valve clack driving piece and the second valve clack driving piece move relative to the sealing valve clack along the valve clack guide grooves, the valve clack guide grooves drive the sealing valve clack to move along a driving inclination angle (alpha), the valve clack guide groove (M1) is provided with a pressing driving surface (M3), the pressing driving surface is provided with a structure inclination angle (beta), and the sealing valve clack is provided with a sealing driving surface (M5). The utility model has the beneficial effects that: the structure of the DBB forced sealing valve operating device is optimized, so that the structure of the DBB forced sealing valve is more compact, the whole size is reduced, the structural strength is good, and the application value of the DBB forced sealing valve is improved.
Description
Technical Field
The utility model belongs to a forced sealing valve, and particularly relates to a DBB forced sealing ball valve driving structure.
Background
The DBB forced sealing valve has outstanding excellent sealing performance, sealing detection under the working condition of line pressure can be realized at the closing position of the valve, and the reliability of closing the valve can be ensured. Chinese invention patent (application nos. 2019108899225, 2019112798373, 202011319032X) discloses a relevant DBB forced sealing valve and an operating device, in a forced sealing structure of the DBB forced sealing valve, a valve flap driving member is a core component, in the structure of the DBB forced sealing valve, an inclined surface driving structure of the valve flap driving member is small, and when a condition of bearing high pressure is involved, the valve flap driving member needs to have a large outline structural size so as to meet functional requirements of the driving structure and rigidity requirements of the components, thereby making the structural size of the DBB forced sealing ball valve excessively redundant. However, the larger structure size not only consumes more high-quality materials and increases the manufacturing cost, but also is not beneficial to installation in some compact pipeline systems, and limits the application of the DBB forced sealing valve.
Disclosure of Invention
The utility model aims to provide a DBB forced sealing ball valve driving structure, which optimizes the structure of a DBB forced sealing valve operating device.
In order to achieve the purpose, the technical scheme of the utility model is as follows: a DBB forced sealing ball valve driving structure comprises a valve core (10), wherein the valve core is provided with a flow channel (11), a first valve clack driving piece (20) and a second valve clack driving piece (30) are respectively arranged on two sides of the flow channel, the first valve clack driving piece and the second valve clack driving piece are driven to move along a valve core rotation axis (C) when the valve core rotates, the first valve clack driving piece and the second valve clack driving piece drive a sealing valve clack (40) to be pressed against or separated from a valve seat (81), the first valve clack driving piece and the second valve clack driving piece are provided with valve clack guide grooves (M1), the sealing valve clack is provided with a valve clack guide rail (M2) in sliding fit with the valve clack guide grooves, the first valve clack driving piece and the second valve clack driving piece move relative to the sealing valve clack along the valve clack guide grooves, and the valve clack guide grooves drive the sealing valve clack to move along a driving inclination angle (alpha), the valve clack guide groove (M1) is provided with a jacking driving surface (M3), the jacking driving surface is provided with a structure inclination angle (beta), and the sealing valve clack is provided with a sealing driving surface (M5).
Furthermore, in order to drive the valve clack to be separated from the valve seat, the valve clack guide groove (M1) is provided with a retracting driving surface (M4), and the pressing driving surface (M3) and the retracting driving surface (M4) form a dovetail groove structure.
Further, the valve clack guide rail (M2) is provided with a retraction driving surface (M6), and the sealing driving surface (M5) and the retraction driving surface (M6) form a dovetail groove structure.
Further, in order to achieve a forced sealing of the bidirectional driving flap, the first flap driver (20) is provided with four flap guide grooves (M1) with respect to the spool rotation axis (C), and the second flap driver (30) is provided with four flap guide grooves (M1) with respect to the spool rotation axis (C).
Furthermore, in a preferred driving structure, the outer contours of the first valve flap driving member (20) and the second valve flap driving member (30) are in a hemispherical segmental shape, an inner spherical surface (24) is arranged on the inner side of the first valve flap driving member, an inner spherical surface (34) is arranged on the inner side of the second valve flap driving member, the first valve flap driving member is provided with a semicircular first flow passage hole (23), the second valve flap driving member is provided with a semicircular second flow passage hole (33), and the sealing valve flap is provided with a sealing spherical surface (43); the first valve clack driving piece is provided with a first valve clack groove (21), a valve clack guide groove (M1) is arranged on two sides of the first valve clack groove (21), the second valve clack driving piece is provided with a second valve clack groove (31), a valve clack guide groove (M1) is arranged on two sides of the second valve clack groove (31), and the sealing valve clack is embedded into the first valve clack groove and the second valve clack groove.
Furthermore, as a valve clack groove structure convenient for processing, the bottom surface (25) of the first valve clack groove is a polygonal surface, and the bottom surface (35) of the second valve clack groove is a polygonal surface.
Further, as a valve flap groove structure for improving the mechanical properties of the structure, the bottom surface (25) of the first valve flap groove is an arc surface, and the bottom surface of the second valve flap groove is an arc surface.
Furthermore, in order to drive the forced sealing structure, a first driving shaft (12) and a second driving shaft (13) are respectively arranged on two sides of the valve core flow passage, the first driving shaft and the second driving shaft drive the first valve clack driving piece and the second valve clack driving piece to move through threads, the first valve clack driving piece is provided with a first threaded hole column (26) corresponding to the first driving shaft, and the second valve clack driving piece is provided with a second threaded hole column (36) corresponding to the second driving shaft.
Furthermore, in order to complete the closing and forced sealing of the valve in one-way rotation of the valve rod, the valve core is connected with the valve rod (50) and rotates along with the valve rod, the valve rod is arranged on a valve cover (60), the valve cover is provided with a stroke stop block (62) for limiting the rotation stroke of the first valve clack driving piece, the stroke stop block extends out of the valve cover at the lower side, and the first valve clack driving piece is provided with a stroke limit block (29) corresponding to the stroke stop block; the first valve clack driving piece rotates in a rotating stroke (R1) between an opening position and a closing position, the first valve clack driving piece is provided with a locking shifting block (27), the locking shifting block is provided with a locking body guide hole (28), a locking body (70) is arranged in the locking body guide hole, the valve rod is provided with a locking groove (51), the locking body is embedded into the locking groove in the rotating stroke of the first valve clack driving piece, and the valve core drives the first valve clack driving piece to rotate; the valve cover is provided with an unlocking groove (61), after the first valve clack driving piece rotates to a closed position, the locking body moves into the unlocking groove and is separated from the locking groove, and the valve core rotates relative to the first valve clack driving piece.
The utility model has the beneficial effects that: the structure of the DBB forced sealing valve operating device is optimized, so that the structure of the DBB forced sealing valve is more compact, the whole size is reduced, the structural strength is good, and the application value of the DBB forced sealing valve is improved.
The utility model is described in detail below with reference to the figures and examples.
Drawings
FIG. 1 is an overall structure view of a DBB forced sealing ball valve of the present invention;
FIG. 2 is a partial block diagram of a DBB positive seal ball valve core of the present invention;
FIG. 3 is a partially exploded view of the valve core of the present invention;
FIG. 4 is a view of the first valve flap actuator and sealing valve flap of the present invention, the bottom surface of the first valve flap groove being a polygonal surface inclined to the axis of rotation of the spool;
FIG. 5 is a view from the direction G of FIG. 4;
FIG. 6 is a cross-sectional view of the valve spool, first and second lobe actuators and sealing lobe configuration;
FIG. 7 is a cross-sectional view A-A of FIG. 6, taken along the line of travel of the first valve flap actuator relative to the sealing valve flap;
FIG. 8 is a view of the first valve flap driving member and the sealing valve flap of the present invention, wherein the bottom surface of the first valve flap groove is a cambered surface;
FIG. 9 is a sectional view of the first flap driving member and the sealing flap in the relative movement direction, in which the bottom surface of the first flap groove is an arc surface;
FIG. 10 is a schematic diagram of the operation of the present invention with the valve in the open position;
FIG. 11 is an operational schematic of the present invention with the first flap actuator within a rotational travel;
FIG. 12 is an operational schematic of the present invention with the first flap actuator rotated to a closed position;
FIG. 13 is an operational view of the present invention with the locking body moved into and out of the unlocking slot;
FIG. 14 is an operational view of the present invention, wherein the valve stem is rotated relative to the first flap actuator, and the first flap actuator and the second flap actuator urge the sealing flap against the valve seat to effect a positive seal.
Detailed Description
The first embodiment is as follows:
referring to fig. 1 to 7, a DBB forced sealing ball valve driving structure includes a valve body 80 and a valve seat 81 (end cap), wherein a valve cover 60 is installed on the valve body, a valve rod 50 is disposed in the valve cover, the valve rod is connected to a valve core 10, and the valve core rotates synchronously with the valve rod. The valve core is connected with a first valve clack driving piece 20 and a second valve clack driving piece 30, the first valve clack driving piece and the second valve clack driving piece are connected with a sealing valve clack 40, the first valve clack driving piece and the second valve clack driving piece drive the sealing valve clack 40 to move through a structure that an inclined plane relatively moves, and the sealing valve clack presses a valve seat 81 to realize forced sealing.
The valve core 10 is provided with a spherical structure, a flow passage 11 is arranged in the center of the spherical structure, in the embodiment, the diameter d1=89mm of the sphere of the valve core is provided with a first driving shaft 12 and a second driving shaft 13 respectively arranged on two sides of the flow passage, the first driving shaft and the second driving shaft are studs with opposite spiral directions, and the end head of the first driving shaft is connected with the valve rod.
The outer contour of the first valve clack driving piece 20 is a hemisphere, the diameter D2=147mm of the outer contour is provided with an inner spherical surface 24 on the inner side of the first valve clack driving piece, the diameter D1=92mm of the inner spherical surface is larger than the spherical diameter D1 of the valve core, the first valve clack driving piece is provided with a semicircular first flow channel hole 23, the diameter D2=70mm of the first flow channel hole is provided with a first screw hole column 26, and a screw hole in the first screw hole column is connected with a stud of the first driving shaft 12.
As a main structural feature of the present invention, in order to drive the movement of the seal flap, the first flap driving member is provided with two first flap grooves 21 which are symmetrically arranged with respect to the valve spool rotation axis C. The width K1=87mm of the first valve clack groove is 0.6 times of the spherical diameter d2 of the outer contour. In order to realize a driving structure for the relative movement of the inclined planes, the valve flap guide grooves M1 are respectively disposed on both sides of each first valve flap groove 21, and drive the sealing valve flap 40 to move along a driving inclination angle α, which is an included angle between the extending direction of the valve flap guide groove M1 and the rotation axis C of the valve core, in the embodiment, the driving inclination angle α =16 °. The jacking driving surfaces M3 of the two valve flap guide grooves M1 are symmetrically arranged, and the two jacking driving surfaces M3 are provided with a structural inclination angle β, which is an included angle between the two jacking driving surfaces, and in this embodiment, the angle of the structural inclination angle β is 134 °, as shown in fig. 6 and 7.
The valve clack guide groove M1 is also provided with a back dragging driving surface M4, and the back dragging driving surface M4 is used for driving the sealing valve clack to be separated from the valve seat and releasing the forced sealing. The top pressing driving surface M3 and the back drawing driving surface M4 form a dovetail groove structure.
The second flap driver 30 and the first flap driver 20 are symmetrically disposed with respect to the ball core of the valve spool 10. The second flap actuator 30 has the same hemispherical outer profile shape (and the same spherical diameter D2) as the first flap actuator, the same diameter (D1 =92 mm) of the inner spherical surface 34, and the same diameter (D2 =70 mm) of the semicircular second flow passage hole 33. After the second valve flap driving member 30 is abutted against the first valve flap driving member 20, the outer profile forms a common spherical surface, and the inner spherical surface also forms a common spherical surface and forms a complete circular flow passage hole. As the driving structure of the sealing flap, the second flap driving member is also provided with two second flap grooves 31, and the second flap grooves 31 have the same structure and size as the first flap grooves 21. The two second valve flap grooves 31 are also symmetrically arranged with respect to the valve body rotation axis C, one valve flap guide groove M1 is also provided on each of both sides of the second valve flap groove 31, and the second valve flap groove 31 and the valve flap guide grooves M1 on both sides, and the first valve flap groove 21 and the valve flap guide grooves M1 on both sides constitute a symmetrical structure with respect to the valve body center. In fact, if the stroke stopper 29 and the lock dial hole 2a explained later are not taken into consideration, the second valve flap actuator has the same structure as the first valve flap actuator.
The sealing valve clack is provided with a sealing spherical surface 43, the sealing valve clack 40 is embedded in the first valve clack groove 21 and the second valve clack groove 31, the sealing valve clack is provided with a valve clack guide rail M2 in sliding fit with the valve clack guide groove M1, the valve clack guide rail M2 is provided with a sealing driving surface M5 and a retraction driving surface M6, the sealing driving surface M5 and the retraction driving surface M6 form a dovetail groove structure corresponding to the valve clack guide rail M2, the sealing driving surface M5 is in sliding fit with a jacking driving surface M3, and the retraction driving surface M6 is in sliding fit with a retraction driving surface M4. The sealing flap 40 is provided with two sets of flap guide rails M2, one set of flap guide rails M2 slidably engaged with the flap guide groove M1 of the first flap actuator 20, and the other set of flap guide rails M2 slidably engaged with the flap guide groove M1 of the second flap actuator 30.
When the valve stem rotates the valve core, the first driving shaft 12 and the second driving shaft 13 drive the first flap driving member and the second flap driving member to move along the rotation axis of the valve core through threads, that is, a distance between the first flap driving member and the second flap driving member changes, the first flap driving member and the second flap driving member move relative to the sealing flap 40 along the flap guide slot M1, and because the flap guide slot of the first flap driving member 20 and the flap guide slot of the second flap driving member 30 are provided with the driving inclination angle α, the first flap driving member and the second flap driving member drive the sealing flap 40 to press or separate from the valve seat 81, thereby realizing sealing or unsealing of the valve.
In this embodiment, the bottom surface 25 of the first valve flap groove is a polygonal surface, and the bottom surface 35 of the second valve flap groove is a polygonal surface, as shown in fig. 4 and 5.
The structure of first valve clack driving piece, second valve clack driving piece and sealed valve clack has been optimized to this embodiment, first valve clack driving piece and second valve clack driving piece have set up valve clack guide slot M1, two roof pressure drive faces M3 of valve clack guide slot are equipped with structure inclination beta, compare with original structure, the outline spherical diameter d2 of first valve clack driving piece (and second valve clack driving piece and sealed valve clack) has reduced 8mm, can effectively reduce the overall dimension of DBB forced seal ball valve, very be favorable to the application of valve. Since a DBB positive seal ball valve usually needs to bear high pressure in the pipeline, the first valve flap driving member and the second valve flap driving member can bear high structural load, the structural rigidity and strength must be ensured while the structural size is reduced, and the structural inclination angle β of the two pressing driving surfaces M3 can obviously improve the driving bearing capacity of the first valve flap driving member and the second valve flap driving member. Through finite element analysis, the structure of the first valve clack driving part and the second valve clack driving part of the present embodiment is superior to the original design. See the finite element analysis diagrams in other documentation.
The DBB forced sealing ball valve realizes the opening, closing and sealing of the valve through the operation of the valve rod, the valve rod can complete the closing and forced sealing of the valve in the one-way rotation process, and the forced sealing can be released and the valve can be opened in the one-way rotation process. The valve rod drives the first valve clack driving piece, the second valve clack driving piece and the two sealing valve clacks to rotate, the first valve clack driving piece, the second valve clack driving piece and the two sealing valve clacks rotate in a rotation stroke (R1 =90 degrees) between an opening position and a closing position, and after the first valve clack driving piece rotates to the closing position, the valve rod (and the valve core) rotates relative to the first valve clack driving piece (rotates towards the closing direction) to push the sealing valve clacks to press against the valve seat to realize forced sealing, as shown in fig. 2.
The operating device structure comprises that the valve rod is provided with a locking groove 51 which is an arc-shaped groove arranged on the outer diameter of the valve rod, and the valve rod is also provided with a reset shifting block 52. The inner hole of the valve cover is provided with an unlocking groove 61, the valve cover is also provided with a travel stop block 62 for limiting the rotation travel of the first valve clack driving piece, the travel stop block extends out of the valve cover at the lower side, and the first valve clack driving piece is provided with a travel limit block 29 corresponding to the travel stop block. The first valve clack driving piece is provided with a locking shifting block 27, the locking shifting block 27 is arranged between the inner hole of the valve cover and the valve rod, in the embodiment, the first valve clack driving piece is provided with a locking shifting block hole 2a on the top surface of the first threaded hole column 26, and the locking shifting block 27 is fixedly arranged in the locking shifting block hole 2 a. The locking shifting block is provided with a locking body guide hole 28, a locking body 70 is arranged in the locking body guide hole, the locking body 70 is a cylinder, the cylindrical surface corresponds to the inner holes of the valve rod and the valve cover, and the locking body can move in the locking body guide hole 28.
As shown in fig. 10, when the valve is in the open state, the locking body 70 is inserted into the locking groove 51, the locking body 70 on the other side is pressed against the inner hole of the valve cover, and the locking body 70 locks the connection relationship between the first flap actuator and the valve stem. As shown in fig. 11, in the rotation stroke of the first valve flap driving member, the locking body is kept embedded in the locking groove, and the valve core drives the first valve flap driving member to rotate.
After the valve stem is rotated in the closing direction (R2), the first flap actuator is prevented from further rotation in the closing direction after the first flap actuator is rotated to the closed position, as shown in fig. 12. At this time, the locking groove 51 of the valve stem is rotated to a position corresponding to the unlocking groove 61 of the bonnet, and as shown in fig. 13, the valve stem continues to be rotated in the closing direction (R2), and the locking groove 51 of the valve stem pushes the locking body 70 to move into the unlocking groove 61 and disengage from the locking groove 51. The valve rod continues to rotate in the closing direction, the valve rod (valve core) rotates relative to the first valve clack driving piece, the first valve clack driving piece and the second valve clack driving piece move in the direction of separating from each other, and the two sealing valve clacks are pushed to press against the valve seat, so that forced sealing is realized, as shown in fig. 14.
When the valve is opened, the valve rod rotates towards the opening direction (R3), the valve rod (valve core) rotates relative to the first valve clack driving piece, the first valve clack driving piece and the second valve clack driving piece move towards the direction close to each other, and drive the two sealing valve clacks to separate from the valve seat, so that the forced sealing is released. When the valve rod rotates to the position that the locking groove 51 corresponds to the unlocking groove 61, the reset shifting block 52 of the valve rod shifts the locking shifting block 27, so that the first valve clack driving piece rotates towards the opening direction, the locking body 70 is pushed to move into the locking groove 51 of the valve rod and is separated from the unlocking groove 61, the locking body 70 locks the connection relation of the first valve clack driving piece and the valve rod again, and the valve rod drives the first valve clack driving piece, the second valve clack driving piece and the two sealing valve clacks to rotate towards the opening direction until the valve rod rotates to the opening position.
Example two:
referring to fig. 8 and 9, a DBB forced sealing ball valve driving structure. This embodiment is a structural alternative to the first embodiment.
In the first embodiment, the bottom surface 25 of the first valve clack groove is a polygon surface, and the bottom surface 35 of the second valve clack groove is also a polygon surface, as shown in fig. 4 and 5, the bottom surfaces of the first valve clack groove and the second valve clack groove are designed into polygon surfaces, which can facilitate the machining in the manufacturing process, the machining process is simple, but the corners of the polygon surfaces are easy to generate stress concentration, which is not beneficial to improving the mechanical strength of the two pieces.
In this embodiment, the bottom surface 25 of the first flap groove is an arc surface, and the bottom surface (not separately shown) of the second flap groove is also an arc surface. The first and second flap grooves of the present embodiment have better mechanical strength.
Claims (9)
1. A DBB forced sealing ball valve driving structure comprises a valve core (10), wherein the valve core is provided with a flow passage (11), a first valve clack driving piece (20) and a second valve clack driving piece (30) are respectively arranged on two sides of the flow passage, the first valve clack driving piece and the second valve clack driving piece are driven to move along a valve core rotation axis (C) when the valve core rotates, the first valve clack driving piece and the second valve clack driving piece drive a sealing valve clack (40) to press against or separate from a valve seat (81), the DBB forced sealing ball valve driving structure is characterized in that the first valve clack driving piece and the second valve clack driving piece are provided with valve clack guide grooves (M1), the sealing valve clack is provided with a valve clack guide rail (M2) in sliding fit with the valve clack guide grooves, the first valve clack driving piece and the second valve clack driving piece move relative to the sealing valve clack along a driving inclination angle (alpha), the valve clack guide groove (M1) is provided with a jacking driving surface (M3), the jacking driving surface is provided with a structure inclination angle (beta), and the sealing valve clack is provided with a sealing driving surface (M5).
2. A DBB positive seal ball valve driving structure according to claim 1, wherein the valve flap guide groove (M1) is provided with a retracting driving surface (M4), and the pressing driving surface (M3) and the retracting driving surface (M4) constitute a dovetail groove structure.
3. A DBB positive seal ball valve driving structure according to claim 1, wherein the flap guide (M2) is provided with a retracting driving surface (M6), and the sealing driving surface (M5) and the retracting driving surface (M6) constitute a dovetail groove structure.
4. A DBB positive seal ball valve driving structure according to claim 1, wherein the first flap driver (20) is provided with four flap guide grooves (M1) with respect to the spool rotation axis (C), and the second flap driver (30) is provided with four flap guide grooves (M1) with respect to the spool rotation axis (C).
5. A DBB positive seal ball valve driving structure according to claim 1, wherein the outer contours of the first and second flap driving members (20, 30) are hemispherical segmental shapes, the inner side of the first flap driving member is provided with an inner spherical surface (24), the inner side of the second flap driving member is provided with an inner spherical surface (34), the first flap driving member is provided with a semicircular first flow passage hole (23), the second flap driving member is provided with a semicircular second flow passage hole (33), and the seal flap is provided with a seal spherical surface (43); the first valve clack driving piece is provided with a first valve clack groove (21), a valve clack guide groove (M1) is arranged on two sides of the first valve clack groove (21), the second valve clack driving piece is provided with a second valve clack groove (31), a valve clack guide groove (M1) is arranged on two sides of the second valve clack groove (31), and the sealing valve clack is embedded into the first valve clack groove and the second valve clack groove.
6. A DBB positive seal ball valve actuation structure according to claim 5, wherein the bottom surface (25) of the first flap groove is a polygonal surface and the bottom surface (35) of the second flap groove is a polygonal surface.
7. A DBB forced sealing ball valve driving structure according to claim 5, wherein the bottom surface (25) of the first flap groove is a cambered surface, and the bottom surface of the second flap groove is a cambered surface.
8. A DBB forced sealing ball valve driving structure according to claim 1, wherein a first driving shaft (12) and a second driving shaft (13) are respectively provided at both sides of the valve core flow passage, the first driving shaft and the second driving shaft drive the first valve flap driving member and the second valve flap driving member to move by screw threads, the first valve flap driving member is provided with a first screw hole column (26) corresponding to the first driving shaft, and the second valve flap driving member is provided with a second screw hole column (36) corresponding to the second driving shaft.
9. A DBB forced sealing ball valve driving structure according to claim 1, wherein the valve core is connected to and rotated with a valve stem (50) mounted on a valve cover (60) provided with a stroke stopper (62) for limiting a rotational stroke of the first valve flap driving member, the stroke stopper is protruded from the valve cover at a lower side, the first valve flap driving member is provided with a stroke stopper (29) corresponding to the stroke stopper; the first valve clack driving piece rotates in a rotating stroke (R1) between an opening position and a closing position, the first valve clack driving piece is provided with a locking shifting block (27), the locking shifting block is provided with a locking body guide hole (28), a locking body (70) is arranged in the locking body guide hole, the valve rod is provided with a locking groove (51), the locking body is embedded into the locking groove in the rotating stroke of the first valve clack driving piece, and the valve core drives the first valve clack driving piece to rotate; the valve cover is provided with an unlocking groove (61), after the first valve clack driving piece rotates to a closed position, the locking body moves into the unlocking groove and is separated from the locking groove, and the valve core rotates relative to the first valve clack driving piece.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121752100.1U CN215334616U (en) | 2021-07-30 | 2021-07-30 | DBB forced sealing ball valve driving structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121752100.1U CN215334616U (en) | 2021-07-30 | 2021-07-30 | DBB forced sealing ball valve driving structure |
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| CN215334616U true CN215334616U (en) | 2021-12-28 |
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| CN202121752100.1U Active CN215334616U (en) | 2021-07-30 | 2021-07-30 | DBB forced sealing ball valve driving structure |
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- 2021-07-30 CN CN202121752100.1U patent/CN215334616U/en active Active
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