CN218094365U - High-temperature high-pressure drainage ball valve - Google Patents
High-temperature high-pressure drainage ball valve Download PDFInfo
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- CN218094365U CN218094365U CN202222191355.6U CN202222191355U CN218094365U CN 218094365 U CN218094365 U CN 218094365U CN 202222191355 U CN202222191355 U CN 202222191355U CN 218094365 U CN218094365 U CN 218094365U
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Abstract
The utility model relates to a hydrophobic ball valve of high temperature high pressure, which comprises a valve body, be equipped with matched with valve ball and disk seat in the valve pocket of valve body, the disk seat includes import side disk seat and outlet side disk seat, be equipped with import side medium passage and outlet side medium passage on the valve body, the outlet side disk seat is annular step form, including being located the distolateral wide footpath section of import and being located the distolateral narrow footpath section of export, be equipped with on the inner wall of outlet side medium passage with outlet side disk seat matched with annular step face, the reducing terminal surface and the cooperation assembly of annular step face of outlet side disk seat, interference fit between the outer wall of narrow footpath section and the inner wall of outlet side medium passage's relevant position, leave the annular gap between the outer wall of wide footpath section and the inner wall of outlet side medium passage's relevant position, be equipped with a plurality of annular decompression groove along its axial on the outer wall of wide footpath section. The setting of annular decompression groove can effectively reduce the medium pressure of outlet side disk seat of flowing through, alleviates the medium to the washing away of outlet side disk seat and valve body's interference fit department to guarantee sealed effect between the two, avoid leaking in the valve.
Description
Technical Field
The utility model relates to a hydrophobic ball valve of high temperature high pressure belongs to valve technical field.
Background
The ball valve has the characteristics of small flow resistance, compact structure, quick opening and closing, light weight and the like besides good sealing performance, has remarkable performances of saving energy consumption, protecting equipment safety and the like, and is widely applied to various fields.
Because the use temperature and the use pressure of the nonmetal sealing ball valve are limited, the nonmetal sealing ball valve can only be used in low-temperature and low-pressure occasions. In high-temperature and high-pressure pipelines in the industries of electric power, petroleum, chemical engineering and the like, a hard-seal high-temperature and high-pressure hydrophobic ball valve is generally used for cutting off the circulation of an isolation medium. If the valve which is cut off and isolated in the pipeline leaks internally, the heat loss of the main steam and water pipeline can be caused, the hidden danger of the safe use of the equipment can be formed, and even the life safety of people can be endangered.
At present, ball valves used in high-temperature and high-pressure drain pipelines generally have inner leakage phenomena of different degrees, and generally consider that the aspects of structural design, manufacturing process and the like of the valves cannot meet working condition requirements, for example, the hardness of a valve seat is too hard, and a surface metal layer often falls off through vibration impact; the hardness of the valve seat is too soft, and the anti-scouring capability is deficient; the valve seat is connected with the valve body and is easy to loosen; the inner components of the valve body expand and deform under the high-temperature and high-pressure environment to cause the problems of sealing failure and the like.
SUMMERY OF THE UTILITY MODEL
For overcoming the above-mentioned defect of prior art, the utility model provides a hydrophobic ball valve of high temperature high pressure, it is sealed effectual, can effectively avoid or reduce revealing of medium.
The utility model discloses realize above-mentioned purpose's technical scheme is: hydrophobic ball valve of high temperature high pressure, including the valve body, be equipped with matched with valve ball and disk seat in the valve pocket of valve body, the disk seat includes import side disk seat and outlet side disk seat, be equipped with on the valve body with import side medium passage and outlet side medium passage of valve pocket intercommunication, the outlet side disk seat is annular step form, including being located the distolateral wide footpath section of import and being located the distolateral narrow footpath section of export, be equipped with on the inner wall of outlet side medium passage with outlet side disk seat matched with annular step face, the reducing terminal surface of outlet side disk seat with annular step face cooperation assembly, the outer wall of narrow footpath section with interference fit between the inner wall of outlet side medium passage's relevant position, the outer wall of wide footpath section with leave annular clearance between the inner wall of outlet side medium passage's relevant position, be equipped with a plurality of annular relief groove along its axial on the outer wall of wide footpath section.
Preferably, the longitudinal section of the annular decompression groove is semicircular or circular arc-shaped.
Preferably, a plurality of annular pressure reduction grooves are uniformly distributed on the wide-diameter section along the axial direction.
Preferably, an arc chamfer is arranged on the outer wall of the outlet end of the narrow-diameter section.
Preferably, the part of the narrow-diameter section, which is in contact with the reducing end face of the outlet-side valve seat, is provided with an annular groove, and the groove wall of the annular groove is arc-shaped.
Preferably, a through adjusting sleeve is arranged in the inlet side medium channel, the adjusting sleeve is coaxial with the inlet side valve seat and is located on the inlet side of the inlet side valve seat, a disc spring is arranged between the adjusting sleeve and the inlet side valve seat, the outer walls of the inlet side valve seat and the adjusting sleeve are in clearance fit with the inner wall of the inlet side medium channel, an internal thread is arranged on the inner wall of the inlet side medium channel and is located on the inlet side of the adjusting sleeve, an adjusting nut is screwed on the internal thread, and the adjusting nut abuts against the inlet end of the adjusting sleeve.
Preferably, the valve ball is provided with a matched valve rod, the valve body is provided with a valve rod hole, a sealing packing ring is filled between the valve rod and the valve rod hole, a packing gland is sleeved on the valve rod, and the packing gland is fixedly connected with the valve body through a compression bolt.
Preferably, a compression disc spring is sleeved on a screw rod of the compression bolt and is located between the head of the compression bolt and the packing gland.
Preferably, the number of the compression disc springs sleeved on the screw rod of the compression bolt is at least two.
Preferably, the number of the compression bolts is a plurality, and the plurality of the compression bolts are uniformly distributed along the same circumference with the center of the packing gland as the center of a circle.
Preferably, the fixed cover in bottom of valve rod is equipped with and is used for the spacing lower stop collar of valve rod axial, the bottom in valve rod hole is radially reamed, the external diameter of lower stop collar with the reaming aperture cooperatees, lower stop collar is located in the reaming, the roof of lower stop collar supports on the reaming diapire.
Preferably, the valve rod is sleeved with a sealing ring, and the sealing ring is located in the expanded hole and located between the top wall of the lower limiting sleeve and the bottom wall of the expanded hole.
Preferably, be equipped with support (or door frame) on the valve body, the support is equipped with upper flange and lower flange, the lower flange pass through the bolt with the top fixed connection of valve body, be equipped with on the lower flange gland packing gland's pilot hole, be equipped with on the upper flange and supply the through-hole that the valve rod passed, the valve rod upwards passes the through-hole and with through-hole normal running fit, fixed cover is equipped with on the valve rod and is used for the spacing upper limit sleeve of valve rod axial, upper limit sleeve is located the below of upper flange, its roof supports on the diapire of upper flange.
Preferably, the lower flange is positioned with the valve body through an elastic pin, and the lower flange and the valve body are provided with elastic pin holes matched with each other.
Preferably, a stepped hole is formed in the center of the upper flange, the aperture of the lower portion of the stepped hole is larger than that of the upper portion of the stepped hole, the aperture of the upper portion of the stepped hole is larger than the outer diameter of the upper limiting sleeve, a stepped limiting ring is fixedly embedded in the stepped hole, the through hole is located in the center of the limiting ring, and the top wall of the upper limiting sleeve abuts against the bottom wall of the limiting ring.
Preferably, the upper limiting sleeve and the lower limiting sleeve are connected with the valve rod through positioning pins, and the upper limiting sleeve, the lower limiting sleeve and the valve rod are provided with matched positioning pin holes.
The utility model has the advantages that:
(1) Because the outlet side valve seat is provided with the (multi-stage) annular pressure reduction groove, after the valve is opened, the high-temperature high-pressure medium flowing through the outlet side valve seat can be effectively reduced in pressure, the pressure of the high-temperature high-pressure medium is obviously reduced when the high-temperature high-pressure medium reaches the interference fit position of the outlet side valve seat and the valve body after being reduced in pressure, and the scouring of the interference fit position of the outlet side valve seat and the valve body is reduced, so that the sealing effect between the outlet side valve seat and the valve body is ensured, the internal leakage of the valve is avoided, and the service life of the valve is prolonged;
(2) Because the two ends of the narrow diameter section of the outlet side valve seat are respectively provided with the arc chamfer and the annular groove, the scouring possibly generated by high-temperature and high-pressure media on the joint surface (interference fit position) of the outlet side valve seat and the valve body can be further lightened, and the sealing effect between the outlet side valve seat and the valve body is further ensured;
(3) Because the disc spring, the adjusting sleeve and the adjusting nut are arranged on the inlet end side of the inlet side valve seat, when an internal component (such as a valve ball or a valve seat and the like) of the valve expands under the influence of a high-temperature high-pressure medium to cause deformation, thrust can be provided for the inlet side valve seat through elastic deformation of the disc spring to compensate the deformation of the corresponding internal component, so that the inlet side valve seat and the valve ball are always in close contact, the sealing effect between the inlet side valve seat and the valve ball is ensured, and the leakage of the high-temperature high-pressure medium is avoided;
(4) Because the screw rod of the compression bolt is sleeved with the compression disc spring, when the valve is used for a long time and related parts (such as a sealing packing ring or a packing gland and the like) deform, the deformation of the related parts can be compensated through the elastic deformation of the compression disc spring, so that the packing gland is always compressed on the sealing packing ring, the sealing effect between the valve rod and the valve body is ensured, and the leakage of a high-temperature and high-pressure medium is avoided;
(5) Because the valve rod is provided with the upper limit sleeve and the lower limit sleeve, the valve rod can be axially and accurately positioned on the valve body and the support, and the valve rod is effectively prevented from being separated from the valve body under the action force of a high-temperature and high-pressure medium to cause serious accidents.
Drawings
Fig. 1 is a schematic structural view of an open state according to an embodiment of the present invention;
FIG. 2 is a schematic view of the closed state of FIG. 1;
FIG. 3 is an enlarged view of a portion of the valve body of FIG. 1 showing the outlet-side valve seat and the corresponding portion;
FIG. 4 is a force analysis of the valve ball and outlet-side seat of FIG. 2;
FIG. 5 is a schematic top view of the packing gland and hold-down bolts of FIG. 1.
Detailed Description
Referring to fig. 1-5, the utility model discloses a hydrophobic ball valve of high temperature high pressure, including valve body 1, be equipped with matched with valve ball 2 and disk seat in the valve pocket of valve body, the disk seat includes inlet side disk seat 3 and outlet side disk seat 4, be equipped with on the valve body with inlet side medium passage and the outlet side medium passage of valve pocket intercommunication, inlet side medium passage with outlet side medium passage is coaxial. The outlet side disk seat is annular step form, including being located the distolateral wide diameter section of import and being located the distolateral narrow diameter section of export, promptly the distolateral external diameter of import of outlet side disk seat is greater than its distolateral external diameter of export, be equipped with on the inner wall of outlet side medium passageway with outlet side disk seat matched with annular step face, the reducing terminal surface of outlet side disk seat with annular step face cooperation assembly, wherein, the outer wall of narrow diameter section with interference fit between the inner wall of the corresponding part (internal diameter with the outer diameter matched with outlet side medium passageway position of narrow diameter section), the outer wall of wide diameter section with leave annular clearance between the corresponding part (internal diameter with the inner wall of the outer diameter matched with outlet side medium passageway position of wide diameter section), be equipped with a plurality of annular decompression groove 5, a plurality of along its axial on the outer wall of wide diameter section annular decompression groove is preferred edge axial evenly distributed on the wide diameter section. The setting of annular decompression groove, after the valve is opened, can play effectual decompression effect to the flow through the high temperature high pressure medium of outlet side disk seat, high temperature high pressure medium reachs after the decompression outlet side disk seat with pressure can obviously reduce during the interference fit department of valve body, alleviates the washing away to the two interference fit department, thereby guarantees outlet side disk seat with sealed effect between the valve body is strengthened outlet side disk seat with leak in the valve is avoided in sealing between the valve body.
The outlet side valve seat and the valve body (referring to an outlet side medium channel of the valve body) can be assembled by adopting a temperature difference method, and the matching interference magnitude of the valve body and the outlet side valve seat is calculated by the thermal expansion coefficient of materials, so that sufficient interference magnitude is ensured under high temperature and high pressure, and the loss of sealing between the outlet side valve seat and the valve body is prevented. The surface roughness of the interference fit part of the outlet side valve seat and the valve body is preferably more than Ra0.8 mu m. The valve body and the sealing between the valve seats on the outlet side are more effective due to the optimized design, higher processing precision and assembly precision, and the stability of the valve ball is relatively guaranteed in the actual use process, so that the service life of the valve is prolonged.
The longitudinal section of the annular pressure reduction groove is preferably semicircular or circular arc-shaped so as to reduce the scouring of high-temperature and high-pressure media on the groove wall of the annular pressure reduction groove.
The outer wall of the outlet end of the narrow-diameter section is preferably provided with an arc chamfer 6, the part (the rear end of the narrow-diameter section) of the narrow-diameter section, which is in contact with the reducing end face of the outlet side valve seat, is preferably provided with an annular groove 7, and the groove wall of the annular groove is arc-shaped. So set up, can further alleviate high temperature high pressure medium to the exit side disk seat with the possible washing that produces of faying face (interference fit department) of valve body further guarantees exit side disk seat with sealed effect between the valve body.
The adjusting sleeve 8 which is communicated with the inlet side medium channel is preferably arranged in the inlet side medium channel, the adjusting sleeve is coaxial with the inlet side valve seat and is located on the inlet side of the inlet side valve seat, a disc spring 9 is arranged between the adjusting sleeve and the inlet side valve seat and is in a compressed state, the outer walls of the inlet side valve seat and the adjusting sleeve are in clearance fit with the inner wall of the inlet side medium channel, internal threads are arranged on the inner wall of the inlet side medium channel and are located on the inlet side of the adjusting sleeve, an adjusting nut 10 is screwed on the internal threads, and the adjusting nut abuts against the inlet end of the adjusting sleeve. The precompression amount of the disc spring is limited by the adjusting nut and the adjusting sleeve, the disc spring is always in a compressed state, thrust is generated on the inlet side valve seat, the sealing performance between the valve ball and the inlet side valve seat is ensured, when an internal component (such as the valve ball or the valve seat and the like) of the valve expands under the influence of high-temperature and high-pressure media to cause deformation, the thrust can be provided on the inlet side valve seat through the elastic deformation of the disc spring, the deformation amount of the corresponding internal component is compensated, the inlet side valve seat and the valve ball are always in close contact, the sealing effect between the inlet side valve seat and the valve ball is ensured, and the high-temperature and high-pressure media are prevented from being leaked.
The ball valve is provided with a matched valve rod 11, a valve rod hole is formed in the valve body, sealing packing rings (the sealing packing rings are filled in packing chambers between the valve rod and the valve body) 12 are filled between the valve rod and the valve rod hole, the number of the sealing packing rings is preferably multiple (for example, 4), a packing gland 13 is sleeved on the valve rod, the packing gland is preferably in an annular inverted step shape, the lower end of the packing gland is inserted into the packing chamber to compress the sealing packing rings, and the packing gland is fixedly connected with the valve body through a compression bolt 14. The screw rod of the compression bolt is preferably sleeved with compression disc springs 15, the compression disc springs are located between the head of the compression bolt and the packing gland, and the number of the compression disc springs is preferably at least two. Due to the arrangement of the compression disc spring, when the valve is used for a long time and related parts (such as a sealing packing ring or a packing gland and the like) deform, the deformation of the related parts can be compensated through the elastic deformation of the compression disc spring, so that the packing gland is always compressed on the sealing packing ring, the sealing effect between the valve rod and the valve body is ensured, and the leakage of high-temperature and high-pressure media is avoided.
The number of the pressing bolts is preferably several (for example, 4), and several pressing bolts are uniformly distributed along the same circumference with the center of the packing gland as the center. By the arrangement, the packing gland can be horizontally pressed into the packing chamber in the assembling process, the influence on the torque of the valve rod is reduced, and the sealing performance between the valve rod and the valve body is ensured.
The bottom of the valve rod is preferably fixedly sleeved with a lower limiting sleeve 16 used for limiting the axial direction of the valve rod, the bottom end of the valve rod hole is radially reamed, the outer diameter of the lower limiting sleeve is matched with the hole diameter of the reamed hole, the lower limiting sleeve is positioned in the reamed hole, and the top wall of the lower limiting sleeve is abutted to the bottom wall of the reamed hole.
Preferably, the valve rod is sleeved with a sealing ring 17, the sealing ring is located in the expanding hole and located between the top wall of the lower limiting sleeve and the bottom wall of the expanding hole, and therefore the sealing effect is guaranteed.
The valve body can be provided with a support (or a portal) 18, the support is provided with an upper flange and a lower flange, the lower flange is fixedly connected with the top of the valve body through a bolt 19, the lower flange is provided with an assembly hole of the packing gland, the upper flange is provided with a through hole for the valve rod to pass through, the valve rod passes upwards through the through hole and is in running fit with the through hole, the top end of the valve rod is positioned above the upper flange, the valve rod is fixedly sleeved with an upper limiting sleeve 20 for limiting the axial direction of the valve rod, the upper limiting sleeve is positioned below the upper flange, and the top wall of the upper flange is abutted against the bottom wall of the upper flange.
The upper limit sleeve and the lower limit sleeve are arranged, so that the valve rod can be positioned accurately in the axial direction on the valve body and the support, and the valve rod is effectively prevented from being separated from the valve body under the action force of a high-temperature high-pressure medium, so that serious accidents are caused.
The lower flange can be positioned with the valve body through an elastic pin 21, and the lower flange and the valve body are provided with elastic pin holes matched with each other.
The center of the upper flange is preferably provided with a stepped hole, the aperture of the lower part of the stepped hole is larger than that of the upper part of the stepped hole, the aperture of the upper part of the stepped hole is larger than the outer diameter of the upper limit sleeve, a stepped limit ring 22 is fixedly embedded in the stepped hole, the through hole is positioned in the center of the limit ring, and the top wall of the upper limit sleeve abuts against the bottom wall of the limit ring. So set up, work as the support is installed back on the valve body is convenient for go up the stop collar and be in the assembly on the valve rod.
The upper limiting sleeve and the lower limiting sleeve are preferably connected with the valve rod through the positioning pin 23, so that assembly is facilitated, and the upper limiting sleeve, the lower limiting sleeve and the valve rod are provided with matched positioning pin holes.
The top of valve ball (the valve ball with the link of valve rod) preferably is equipped with the recess, the recess is the rectangular channel preferably, the bottom of valve rod be equipped with the shape matched with protrusion (or tenon) of recess, the protrusion inserts realize in the recess the valve ball with the assembly of valve rod (leave the assembly clearance), the vertical center line of valve ball with the axis coincidence of valve rod, lower stop collar is located convex top. The top end of the valve stem may be provided with a keyway 24 for connection to a handle or an electric, pneumatic or turbine drive. The outer surface of the valve rod can ensure the shearing and extrusion strength of the valve rod through hardening treatment and grinding treatment, and can also ensure the wear resistance of the valve rod, so that the valve rod is safer and more reliable when in use.
The valve body is processed by adopting a free forging, so that the use strength of the valve body is ensured. In order to guarantee valve scour resistance, leakproofness and wearability, the valve ball with the disk seat all adopts metal material, nevertheless adopts different process, the surface of valve ball adopts the supersonic speed spraying, makes its surface hardness increase, and wearability and scour resistance are stronger, the disk seat adopts the stellite build-up welding, makes the hardness of sealed face be less than the hardness of valve ball, certain elastic deformation (formation elastic deformation is sealed) when sealed, makes the valve ball with sealed safe and reliable more between the disk seat can bear higher operating temperature and service pressure, guarantees the safety in utilization of valve, still can avoid because the valve ball with the hardness of disk seat is too high, and leads to the valve ball with the disk seat delamination causes the condition such as leaking in the valve, valve jamming to take place.
The utility model has the characteristics of sealing performance is good, wear-resisting, anti erosion and long service life etc, can effectively prevent revealing of high temperature high pressure medium.
The preferred and optional technical means disclosed in the present invention, except for the specific description and the further limitation that one preferred or optional technical means is another technical means, can be combined at will to form a plurality of different technical solutions.
Claims (10)
1. Hydrophobic ball valve of high temperature high pressure, including the valve body, be equipped with matched with valve ball and disk seat in the valve pocket of valve body, the disk seat includes import side disk seat and outlet side disk seat, be equipped with on the valve body with import side medium passage and outlet side medium passage of valve pocket intercommunication, its characterized in that the outlet side disk seat is annular step form, including being located the distolateral wide diameter section of import and being located the distolateral narrow diameter section of export, be equipped with on the inner wall of outlet side medium passage with outlet side disk seat matched with annular step face, the reducing terminal surface of outlet side disk seat with the cooperation assembly of annular step face, the outer wall of narrow diameter section with interference fit between the inner wall of outlet side medium passage's relevant position, the outer wall of wide diameter section with leave annular clearance between the inner wall of outlet side medium passage's relevant position, be equipped with a plurality of annular decompression groove along its axial on the outer wall of wide diameter section.
2. A high temperature, high pressure hydrophobic ball valve as defined in claim 1 wherein a plurality of said annular pressure relief grooves are axially uniformly distributed on said wide diameter section.
3. The high temperature high pressure hydrophobic ball valve of claim 1, wherein the outer wall of the outlet end of the narrow diameter section is provided with a rounded chamfer.
4. A high temperature and high pressure hydrophobic ball valve as claimed in claim 3, wherein the narrow diameter section is provided with an annular groove at a portion contacting with the variable diameter end surface of the outlet side valve seat, and a groove wall of the annular groove is arc-shaped.
5. The high-temperature high-pressure hydrophobic ball valve as claimed in claim 1, wherein a through adjusting sleeve is disposed in the inlet-side medium passage, the adjusting sleeve is coaxial with the inlet-side valve seat and located at an inlet end side of the inlet-side valve seat, a disc spring is disposed between the adjusting sleeve and the inlet-side valve seat, outer walls of the inlet-side valve seat and the adjusting sleeve are in clearance fit with an inner wall of the inlet-side medium passage, an internal thread is disposed on an inner wall of the inlet-side medium passage, the internal thread is located at an inlet end side of the adjusting sleeve, an adjusting nut is screwed onto the internal thread, and the adjusting nut abuts against an inlet end of the adjusting sleeve.
6. The high-temperature high-pressure hydrophobic ball valve as claimed in claim 1, wherein the ball valve is provided with a matched valve stem, the valve body is provided with a valve stem hole, a sealing packing ring is filled between the valve stem and the valve stem hole, a packing gland is sleeved on the valve stem, and the packing gland is fixedly connected with the valve body through a compression bolt.
7. The high temperature and high pressure hydrophobic ball valve as claimed in claim 6, wherein the compression disc spring is sleeved on the screw of the compression bolt and located between the head of the compression bolt and the packing gland.
8. The high-temperature high-pressure hydrophobic ball valve as claimed in claim 6, wherein a lower limiting sleeve for axially limiting the valve rod is fixedly sleeved at the bottom of the valve rod, the bottom end of the valve rod hole is radially reamed, the outer diameter of the lower limiting sleeve is matched with the hole diameter of the reamed hole, the lower limiting sleeve is located in the reamed hole, and the top wall of the lower limiting sleeve abuts against the bottom wall of the reamed hole.
9. The high temperature, high pressure hydrophobic ball valve of claim 8, wherein the stem is sleeved with a sealing ring, the sealing ring being located within the counterbore and between a top wall of the lower stop collar and a bottom wall of the counterbore.
10. The high-temperature high-pressure hydrophobic ball valve as claimed in claim 6, wherein a support is provided on the valve body, the support is provided with an upper flange and a lower flange, the lower flange is fixedly connected with the top of the valve body through bolts, the lower flange is provided with assembly holes for the packing gland, the upper flange is provided with through holes for the valve rod to pass through, the valve rod passes upward through the through holes and is rotatably matched with the through holes, the upper fixing sleeve on the valve rod is provided with an upper limiting sleeve for axially limiting the valve rod, the upper limiting sleeve is located below the upper flange, and the top wall of the upper limiting sleeve abuts against the bottom wall of the upper flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222191355.6U CN218094365U (en) | 2022-08-19 | 2022-08-19 | High-temperature high-pressure drainage ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222191355.6U CN218094365U (en) | 2022-08-19 | 2022-08-19 | High-temperature high-pressure drainage ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218094365U true CN218094365U (en) | 2022-12-20 |
Family
ID=84448536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222191355.6U Active CN218094365U (en) | 2022-08-19 | 2022-08-19 | High-temperature high-pressure drainage ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218094365U (en) |
-
2022
- 2022-08-19 CN CN202222191355.6U patent/CN218094365U/en active Active
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