CN217177490U - Ball valve of integral support - Google Patents
Ball valve of integral support Download PDFInfo
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- CN217177490U CN217177490U CN202220838581.6U CN202220838581U CN217177490U CN 217177490 U CN217177490 U CN 217177490U CN 202220838581 U CN202220838581 U CN 202220838581U CN 217177490 U CN217177490 U CN 217177490U
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Abstract
Based on the problem that the support and the valve body are easy to rotate in a staggered mode when the existing ball valve transmits large torque, the utility model discloses a ball valve with an integral support, which structurally comprises a valve shell, a valve rod, a ball body and a driving device; the valve shell comprises a valve body, and the top of the valve shell is provided with an integrally formed valve rod support seat; the bottom of the valve rod support seat is provided with a first sliding bearing; the valve cover is arranged at the top of the valve rod support seat, and a second sliding bearing is arranged on the valve cover; the end cover is connected with the valve body and forms a valve cavity with the valve body; two ends of the valve cavity are respectively communicated with the fluid passages of the valve body and the end cover; the ball is arranged in the valve cavity, and two sides of the ball are respectively fixed by the valve seats; the axial center lines of the inner rings of the first sliding bearing and the second sliding bearing and the axial center line of the ball body are on the same vertical line; the valve rod is connected with the ball body through a first sliding bearing and a second sliding bearing; the driving device is arranged on the valve cover. The ball valve can prevent the problem that the support and the valve are dislocated and rotated relatively.
Description
Technical Field
The utility model belongs to the technical field of the valve, in particular to ball valve of integral support.
Background
At present, general gear boxes, electric, pneumatic, gas-liquid linkage and other ball valves for transmitting large torque basically comprise a valve body, a support, a ball valve rod and the like to form a transmission chain.
However, when a large torque is transmitted and an electric, pneumatic, gas-liquid linkage driving device with a relatively high operation speed is used, the support and the valve body are easy to rotate relatively to cause dislocation, so that the valve is not opened and closed properly, the valve is leaked, and in addition, the stud and the cylindrical pin are easy to cut off due to rotation dislocation, so that accidents are caused.
SUMMERY OF THE UTILITY MODEL
Based on the problem that present ball valve can not be fine be applicable to the great moment of torsion of transmission and to drive arrangement such as the electric, pneumatics, gas-liquid linkage that the functioning speed is very fast relatively, one of the purposes of the utility model is to provide a ball valve of integral support, this ball valve can avoid the ball valve when the great moment of torsion of transmission and to drive arrangement such as the electric, pneumatics, gas-liquid linkage that the functioning speed is very fast relatively, thereby rotate relatively easily between support and valve body and cause the dislocation to lead to the valve switch not in place, cause the problem that the valve was revealed.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the ball valve with integral support includes valve casing, valve rod, ball and driver.
The valve shell comprises a valve body, and the top of the valve shell is provided with an integrally formed valve rod support seat; the bottom of the valve rod support seat is provided with a first sliding bearing; the valve cover is arranged at the top of the valve rod bracket seat; the valve cover is provided with a second sliding bearing; the end cover is connected with the valve body and forms a valve cavity with the valve body; and two ends of the valve cavity are respectively communicated with the valve body and the fluid channel of the end cover.
Wherein the ball is disposed within the valve cavity; two sides of the ball body are respectively fixed by valve seats arranged on the valve body and the end cover; the axial center lines of the inner rings of the first sliding bearing and the second sliding bearing and the axial center line of the ball body are on the same vertical line; the valve rod passes through the first sliding bearing, the second sliding bearing and is connected with the ball body; the driving device is arranged on the valve cover and fixedly connected with the valve rod so as to drive the valve rod to rotate.
In one of the technical solutions disclosed in the present invention, the valve stem support further comprises a packing device to seal the gap between the valve stem and the valve stem support seat; the packing device comprises:
the packing box is sleeved outside the valve rod and forms a packing cavity with the valve rod;
a filler disposed within the filler cavity;
the packing pressing sleeve is positioned above the packing and is abutted against the packing;
and the packing pressing plate is positioned above the packing pressing sleeve, is fixedly connected with the valve rod support seat and is abutted against the packing pressing sleeve.
In one technical scheme disclosed by the utility model, a fixing ring is arranged on the outer peripheral wall of the stuffing box; the inner wall of the valve rod support seat is provided with a positioning step matched with the fixing ring; the bottom surface of the fixing ring is in contact with the radial end surface of the positioning step; the upper surface of the fixing ring is provided with a pressing ring; the pressing ring and the valve rod support seat are fixedly connected to fasten the stuffing box.
The utility model discloses an among the technical scheme, the clamping ring with the valve rod support seat is fixed through hexagon socket head cap screw connection, the clamp plate that packs with the valve rod support seat passes through the double-screw bolt nut and connects fixedly.
The utility model discloses an among the technical scheme, solid fixed ring's lower surface with be provided with the winding gasket between the radial terminal surface of location step.
In one of the technical solutions disclosed in the present invention, the valve seat and the ball form a sealing pair through match grinding.
In one of the technical solutions disclosed in the present invention, the valve seat is further provided with a plurality of axial springs; one end of the axial spring is connected with the valve shell; the other end is fixedly connected with the valve seat through a spring seat;
the valve shell is provided with a spring hole along the axial direction, and the spring hole is close to the axial end face of the spring seat;
one end of the axial spring is abutted against the bottom of the spring hole.
In one of the technical solutions disclosed in the present invention, a first annular groove and a second annular groove are disposed at a connection end surface of the valve seat and the valve housing; fireproof packing is arranged in the first annular groove; and a sealing ring is arranged in the second annular groove.
In one of the technical solutions disclosed in the present invention, the lower end of the sphere is further provided with a support shaft; the axial center line of the supporting shaft and the axial center line of the valve rod are on the same vertical line; the support shaft is installed at the lower end of the sphere through a support seat.
The utility model discloses an among one of them technical scheme, the bottom of gland box still is equipped with valve rod thrust washer.
As can be seen from the above description, compared with the prior art, the beneficial effects of the present invention are:
1. the valve rod support base and the valve body are integrally formed, the valve cover is arranged at the top of the valve rod support base, and the driving device is arranged on the valve cover to drive the valve rod to rotate, so that the valve is opened and closed, and related standard parts required by the connection of a traditional valve support and the valve body are reduced, so that the weight of the valve is reduced; meanwhile, the problem that the valve is not in place due to the fact that the support and the valve body rotate in a relative dislocation mode when the torque of the driving device is transmitted by the valve rod is solved; furthermore, a first sliding bearing is arranged at the bottom of the valve rod support seat, a second sliding bearing coaxial with the first sliding bearing is arranged on the valve cover, the valve rod penetrates through the first sliding bearing, the second sliding bearing and the ball body to be connected, double-bearing support of the valve rod is achieved, support rigidity of the valve rod is improved, and resistance for opening and closing the valve is reduced; the ball valve is suitable for driving devices with higher running speed and larger transmission torque, such as electric, pneumatic, gas-liquid linkage and the like by matching the two parts;
2. furthermore, a packing device is arranged to seal the gap between the valve rod and the valve rod bracket base so as to prevent water leakage and air leakage; meanwhile, when the deformation of the packing is small, the compression degree of the packing gland on the packing can be automatically adjusted by winding the gasket; when the deformation of the filler is large, the adjustment can be carried out through the nuts and the studs on the filler pressing plate, and the operation is simple and convenient.
3. Furthermore, the valve seat and the ball body form a sealing pair through match grinding, and sealing pretightening force is provided through the axial spring, so that the sealing performance of the valve seat is improved; meanwhile, a first annular groove and a second annular groove are formed in the connecting end face of the valve seat and the valve shell, fireproof filler is filled in the first annular groove, and a sealing ring is arranged in the second annular groove to seal a gap between the valve seat and the valve shell, so that the sealing performance of the valve seat is improved, and the valve body can be protected.
3. Finally, the lower end of the ball body is provided with a support shaft, and the ball body cannot move left and right along the flow channel and move up and down along the vertical flow channel through double fixation of the valve rod and the support shaft, and only can rotate around the axial central line of the valve rod and the support shaft, so that the valve is protected.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments or technical descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a longitudinal section of the present invention.
Fig. 2 is a schematic diagram of a half-section structure of the present invention.
Fig. 3 is an enlarged schematic view of a portion a of fig. 1.
Fig. 4 is an enlarged schematic view of fig. 2 at B.
Reference numerals:
1-a valve housing; 11-a valve body; 12-an end cap; 13-valve stem support seat; 131-a first sliding bearing; 14-a valve cavity; 15-valve cover; 151-second sliding bearing;
2-a sphere; 21-valve seat; 211 — a first annular groove; 212-a second annular groove; 213-axial spring; 215-spring hole; 216-spring seat; 22-a first mounting groove; 23-a second mounting groove;
3-a valve stem;
4-a drive device;
5-a packing device; 51-stuffing box; 511-a fixed ring; 512-winding a gasket; 513-pressing ring; 52-packing and pressing; 53-caulk plate; 55-a filler; 56-valve stem thrust washer;
6-supporting the shaft; 7-supporting seat.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The embodiment of the utility model discloses ball valve of integral support, its structure is as shown in fig. 1-4, including valve housing 1, spheroid 2, valve rod 3 and drive arrangement 4.
Specifically, the valve housing 1 includes a valve body 11, an end cap 12, a stem holder base 13, a valve cavity 14, and a valve cover 15.
The valve body 11 and the end cover 12 are fixedly connected through a stud nut, and a valve cavity 14 for accommodating the ball 2 is formed, and two ends of the valve cavity 14 are respectively communicated with the fluid passages of the valve body 11 and the end cover 12. The valve body 11 is provided at the top with a stem support seat 13 communicating with the valve chamber 14 and formed integrally with the valve body 11. The valve rod support base 13 is provided with a first sliding bearing 131 at the bottom and a valve cover 15 at the top. The valve cover 15 is provided with a second sliding bearing 151. The axial center lines of the inner ring of the first sliding bearing 131 and the inner ring of the second sliding bearing 151 are on the same vertical line. In this embodiment, the valve cover 15 is fixedly connected to the valve rod support base 13 by a socket head cap screw, and the cylindrical pin is further disposed between the valve cover 15 and the valve rod support base 13.
The ball 2 is arranged in the valve chamber 14, and is fixed on both sides by valve seats 21 arranged in the valve body 11 and the end cover 12, respectively. The top of the ball 2 is provided with a first mounting groove 22. The axial center line of the first mounting groove 22 and the axial center line of the ball 2 are on the same vertical line.
One end of the valve rod 3 passes through the first sliding bearing 131 in the valve rod bracket seat 13 and is fixedly connected with the groove bottom of the first installation groove 22 of the ball body 2, and the other end passes through the second sliding bearing 151 and penetrates out of the valve cover 15.
The driving device 4 is installed on the top of the valve cover 15 and connected with the valve rod 3 to drive the valve rod 3 to rotate, so as to drive the ball 2 to rotate together, thereby realizing the opening and closing of the valve.
By adopting the structure, the valve rod support base 13 and the valve body 11 are integrally formed, the valve cover 15 is arranged at the top of the valve rod support base 13, the driving device 4 is arranged on the valve cover 15 to drive the valve rod 3 to rotate, so that the opening and closing of the valve are realized, the related standard parts required by the connection of the traditional valve support and the valve body are reduced, and the weight of the valve is reduced; meanwhile, the problem that the valve is not in place due to the fact that the support and the valve body rotate in a relative dislocation mode when the torque of the driving device is transmitted by the valve rod is solved; furthermore, a first sliding bearing 131 is arranged at the bottom of the valve rod support base 13, and a second sliding bearing 151 coaxial with the first sliding bearing 131 is arranged on the valve cover 15, so that double-bearing support of the valve rod is realized, the support rigidity of the valve rod is improved, and the resistance of opening and closing the valve is reduced; the ball valve is suitable for driving devices with high running speed and large transmission torque, such as electric, pneumatic, gas-liquid linkage and the like by matching the two.
More specifically, as shown in fig. 2 and 4, the packing device 5 is provided in the stem support base 13 to seal a gap between the valve stem 3 and the stem support base 13, thereby preventing fluid in the valve body 11 from leaking out and air from entering the valve chamber 14. The stuffing device 5 comprises a stuffing box 51, a stuffing press sleeve 52 and a stuffing press plate 53.
Wherein a gap is present between the top of the stem carrier seat 13 and the valve stem 3. Stuffing boxes 51 are provided in the gaps. The outer wall of the stuffing box 51 is in close contact with the inner wall of the valve rod support base 13, and a stuffing cavity is formed between the inner wall and the outer wall of the valve rod 3. The inner side of the stuffing box 51 is provided with a stuffing 55, a stuffing pressing sleeve 52 and a stuffing pressing plate 53 in sequence along the axial direction corresponding to the stuffing cavity. Wherein, the packing pressure plate 53 is connected with the valve rod bracket base 13 through a stud nut.
With the above structure, the fluid can be prevented from leaking to the outside from the gap between the valve stem poppet 13 and the valve stem 3.
More specifically, the packing box 51 further has a fixing ring 511 on the outer peripheral wall thereof, and accordingly, the inner wall of the stem holder base 13 has a positioning step for cooperation with the fixing ring 511. Wherein, the bottom of the fixed ring 511 contacts with the radial end face of the positioning step of the valve rod bracket seat 13, and a winding gasket 512 is arranged between the fixed ring 511 and the positioning step. The top of the fixing ring 511 is provided with a pressing ring 513, and the packing box 51 and the stem holder 13 are integrally connected by a plurality of socket head cap screws penetrating the pressing ring 513.
By adopting the structure, when the deformation of the filler 55 is small, the compression degree of the filler pressing plate 53 on the filler 55 can be automatically adjusted by winding the gasket 512; when the deformation of the packing 55 is large, the adjustment can be performed through the nut studs on the packing pressure plate 53, and the operation is simple.
More specifically, the bottom of the stuffing box 51 is also provided with a stem thrust washer 56 which prevents the stem 3 from rotating automatically.
More specifically, as shown in fig. 1 and 3, a sealing pair is formed between the valve seat 21 and the ball 2 through match grinding. The valve seat 21 is also provided with a plurality of axial springs 213. Wherein, the valve housing 1 has a spring hole 215 along the axial direction near the axial end face of the valve seat 21. The axial spring 213 is mounted in a spring bore 215 of the valve housing 1 and is connected to the valve seat 21 via a spring seat 216. In the present embodiment, the axial spring 213 is a cylindrical spring.
By adopting the structure, the axial spring 213 provides the sealing pretightening force between the valve seat 21 and the ball body 2, so that the contact surface between the valve seat 21 and the ball body 2 is tightly attached, and the sealing performance is better.
More specifically, a first annular groove 211 and a second annular groove 212 are provided at the connection end surface of the valve seat 21 and the valve housing 1. The first annular recess 211 is adjacent the ball 2 and is filled with a fire-resistant filler. A sealing ring is arranged in the second annular groove 212 to seal a gap between the valve seat 21 and the valve housing 1; thereby improving the sealing performance of the valve seat and preventing the damage of the valve.
More specifically, the lower end of the sphere 2 is also provided with a support shaft 6. The support shaft 6 is fixed to the bottom of the valve body 11 by a support base 7. Wherein, the bottom of the sphere 2 is provided with a second mounting groove 23, and the axial center line of the second mounting groove 23 and the axial center line of the first mounting groove 22 are on the same straight line. One end of the supporting shaft 6 passes through the valve body 11 and is fixedly connected with the groove bottom of the second mounting groove 23.
By adopting the structure, the ball body 2 can not move left and right along the flow channel and move up and down along the vertical flow channel through the double fixation of the valve rod 3 and the supporting shaft 6, and can only rotate around the axial central line of the valve rod 3 and the supporting shaft 6, thereby being beneficial to protecting the valve.
More specifically, the driving device 4 and the valve rod 3 are fixed by a C-type key connection.
As can be seen from the above description, the working principle and the beneficial effects of the embodiment of the present invention are:
the valve rod support seat and the valve body are integrally formed, the valve cover is arranged at the top of the valve rod support seat, and the driving device is arranged on the valve cover to drive the valve rod to rotate, so that the valve is opened and closed, and related standard parts required by the connection of a traditional valve support and the valve body are reduced, so that the weight of the valve is reduced; meanwhile, the problem that the valve is not in place due to the fact that the support and the valve body rotate in a relative dislocation mode when the torque of the driving device is transmitted by the valve rod is solved; furthermore, a first sliding bearing is arranged at the bottom of the valve rod support seat, a second sliding bearing coaxial with the first sliding bearing is arranged on the valve cover, the valve rod penetrates through the first sliding bearing, the second sliding bearing and the ball body to be connected, double-bearing support of the valve rod is achieved, support rigidity of the valve rod is improved, and resistance for opening and closing the valve is reduced; the ball valve is suitable for driving devices with higher running speed and larger transmission torque, such as electric, pneumatic, gas-liquid linkage and the like by matching the two parts; furthermore, a packing device is arranged to seal the gap between the valve rod and the valve rod bracket base so as to prevent water leakage and air leakage; meanwhile, when the deformation of the packing is small, the compression degree of the packing gland on the packing can be automatically adjusted by winding the gasket; when the deformation of the filler is large, the adjustment can be carried out through the nut stud on the filler pressing plate, and the operation is simple and convenient; furthermore, the valve seat and the ball body form a sealing pair through match grinding, and sealing pretightening force is provided through the axial spring, so that the sealing performance of the valve seat is improved; meanwhile, a first annular groove and a second annular groove are arranged at the connecting end face of the valve seat and the valve shell, fireproof filler is filled in the first annular groove, and a sealing ring is arranged in the second annular groove to seal a gap between the valve seat and the valve shell, so that the sealing property of the valve seat is improved, and the valve body can be protected; finally, the lower end of the ball body is provided with a support shaft, and the ball body cannot move left and right along the flow channel and move up and down along the vertical flow channel through double fixation of the valve rod and the support shaft, and only can rotate around the axial central line of the valve rod and the support shaft, so that the valve is protected.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An integral poppet ball valve, comprising:
a valve housing, a valve stem, a ball and a drive;
wherein the valve housing comprises:
the valve body is provided with an integrally formed valve rod support seat at the top; the bottom of the valve rod support seat is provided with a first sliding bearing;
the valve cover is arranged at the top of the valve rod bracket seat; the valve cover is provided with a second sliding bearing;
the end cover is connected with the valve body and forms a valve cavity with the valve body; two sides of the valve cavity are respectively communicated with the valve body and the fluid channel of the end cover;
wherein the ball is disposed within the valve cavity; valve seats are arranged on both sides of the sphere;
the axial center lines of the inner rings of the first sliding bearing and the second sliding bearing and the axial center line of the ball body are on the same vertical line;
the valve rod passes through the first sliding bearing and the second sliding bearing and is fixedly connected with the ball body;
the driving device is arranged on the valve cover and fixedly connected with the valve rod so as to drive the valve rod to rotate.
2. The one-piece carrier ball valve of claim 1, further comprising packing means to seal a gap between the valve stem and the valve stem carrier seat; the packing device comprises:
the packing box is sleeved outside the valve rod and forms a packing cavity with the valve rod;
a filler disposed within the filler cavity;
the packing pressing sleeve is positioned above the packing and is abutted against the packing;
and the packing pressing plate is positioned above the packing pressing sleeve, is fixedly connected with the valve rod support seat and is abutted against the packing pressing sleeve.
3. A one-piece holder ball valve in accordance with claim 2, wherein a fixing ring is provided on an outer peripheral wall of the stuffing box;
the inner wall of the valve rod support seat is provided with a positioning step matched with the fixing ring;
the bottom surface of the fixing ring is in contact with the radial end surface of the positioning step;
the upper surface of the fixing ring is provided with a pressing ring; the pressing ring and the valve rod support seat are fixedly connected to fasten the stuffing box.
4. The ball valve with integral support according to claim 3, wherein the pressing ring and the valve stem support base are fixedly connected through a socket head cap screw, and the packing pressing plate and the valve stem support base are fixedly connected through a stud nut.
5. A one-piece carrier ball valve in accordance with claim 3, wherein a wrap washer is disposed between the lower surface of the retainer ring and the radial end surface of the retention step.
6. A one-piece carrier ball valve in accordance with claim 2 wherein the bottom of the stuffing box is further provided with a stem thrust washer.
7. The one-piece poppet ball valve of claim 1, wherein the valve seat and the ball form a sealing pair by wear-fit.
8. An integral holder ball valve according to claim 1 or 7, wherein a plurality of axial springs are further provided on said valve seat; one end of the axial spring is connected with the valve shell; the other end is fixedly connected with the valve seat through a spring seat;
the valve shell is provided with a spring hole along the axial direction, and the spring hole is close to the axial end face of the spring seat;
one end of the axial spring is abutted against the bottom of the spring hole.
9. A one-piece poppet ball valve in accordance with claim 8, wherein the valve seat and the valve housing are provided at a connecting end surface thereof with a first annular groove and a second annular groove; fireproof packing is arranged in the first annular groove; and a sealing ring is arranged in the second annular groove.
10. The one-piece self-supporting ball valve according to claim 1, wherein a support shaft is further provided at a lower end of the ball body; the axial center line of the supporting shaft and the axial center line of the valve rod are on the same vertical line; the support shaft is installed at the lower end of the sphere through a support seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220838581.6U CN217177490U (en) | 2022-04-12 | 2022-04-12 | Ball valve of integral support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220838581.6U CN217177490U (en) | 2022-04-12 | 2022-04-12 | Ball valve of integral support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217177490U true CN217177490U (en) | 2022-08-12 |
Family
ID=82710030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220838581.6U Active CN217177490U (en) | 2022-04-12 | 2022-04-12 | Ball valve of integral support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217177490U (en) |
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2022
- 2022-04-12 CN CN202220838581.6U patent/CN217177490U/en active Active
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