CN214743469U - High-temperature high-pressure hard sealing ball valve - Google Patents
High-temperature high-pressure hard sealing ball valve Download PDFInfo
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- CN214743469U CN214743469U CN202120580836.9U CN202120580836U CN214743469U CN 214743469 U CN214743469 U CN 214743469U CN 202120580836 U CN202120580836 U CN 202120580836U CN 214743469 U CN214743469 U CN 214743469U
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Abstract
The utility model provides a high temperature high pressure ball valve sealed firmly goes up the valve seat and includes first elastic component, is suitable for to apply towards spheroidal pretightning force to last seat circle. The lower pressing ring is fixed on the lower valve cover and is suitable for pressing the lower seat ring on the lower valve cover along the medium flow direction. The sealing filler is arranged between the lower seat ring and the lower valve cover, the sealing filler is heated to expand under a high-temperature condition to jack the lower seat ring, and is limited by the lower pressing ring, so that the expansion of the sealing filler can seal gaps more tightly, and the sealing property is improved. Meanwhile, due to the limitation of the lower pressing ring, the expansion of the sealing filler cannot cause the axial deviation of the lower valve seat, so that the lower valve seat is prevented from pushing the ball body to reversely extrude the first elastic piece, and the opposite acting force of the upper valve seat and the lower valve seat on the ball body is too large, so that the valve is blocked. The ball body is in hard sealing contact with the upper valve seat and the lower valve seat, other materials are not introduced, and effective sealing performance under high temperature and high pressure is guaranteed.
Description
Technical Field
The utility model relates to the technical field of valves, concretely relates to high temperature high pressure ball valve sealed firmly.
Background
Ball valves are widely used in various chemical industries. With the development of science and technology, the requirements of valve users on valves are higher and higher, such as: high temperature, ultra-high temperature, high corrosive media, high catalyst washout hard seal requirements, and the like.
The high-temperature, high-pressure and hard sealing ball valve in the current market generally adopts a two-section or three-section welding type structure, the applicable temperature is below 450 ℃, and the applicable pressure is lower than 1500 LB. When the temperature is too high, the existing valve structure is easy to cause the valve to be blocked, the ball body cannot be rotated to open and close the medium flow passage, and great potential safety hazards exist; the valve is easy to leak under the low-temperature and low-pressure environment due to structural fatigue caused by a high-temperature process, and the sealing performance of the valve is affected.
Therefore, the overall sealing performance and safety performance of the existing valve have great hidden danger in alternating temperature and pressure environments, so that hard-seal floating ball valves which can be suitable for high-temperature and high-pressure environments with the temperature of more than 450 ℃ are rarely seen in the market, and the requirements of the hard-seal floating ball valves under the working condition of high-temperature catalysts are more difficult to meet.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the unable high temperature catalysis operating mode that is suitable for of conventional valve among the prior art.
Therefore, the utility model provides a high temperature high pressure ball valve sealed firmly, include:
the valve comprises a valve body, a valve rod, a ball body, an upper valve cover, a lower valve cover, an upper valve seat and a lower valve seat, wherein the upper valve seat is arranged corresponding to the upper valve cover, the lower valve seat is arranged corresponding to the lower valve cover, the valve rod is connected with the ball body and is fixedly arranged on the valve body in a penetrating way,
the inner ring of the upper valve cover is provided with at least one step corresponding to the ball body; the inner ring of the lower valve cover is provided with at least two steps corresponding to the ball body;
the upper valve seat comprises a first elastic piece, and the first elastic piece is suitable for applying pre-tightening force towards the ball to the upper seat ring;
the lower valve seat includes:
the lower seat ring is fixed on one step of the lower valve cover and is mutually abutted with the step surface to form a sealing surface;
the lower pressing ring is fixed on the other adjacent step on the lower valve cover, partially extends out of the step surface and is suitable for pressing the lower seat ring on the lower valve cover along the medium flow direction;
a first groove is formed in a step surface, corresponding to the lower seat ring, of the lower valve cover and perpendicular to the axial direction of the lower valve cover; the first groove is filled with sealing filler;
the ball body is in hard sealing contact with the upper valve seat and the lower valve seat.
The cross section of the lower pressing ring is L-shaped, and the lower pressing ring is suitable for being attached to the step.
In the axial direction of the lower valve cover, a gap is formed between the lower pressing ring and the lower seat ring, and sealing filler is filled in the gap.
The upper valve seat also comprises an upper seat ring which is fixed on at least one step of the upper valve cover; the first elastic piece is arranged between the corresponding step surface and the upper seat ring.
The upper seat ring is arranged on the two steps of the upper valve cover in a spanning manner; a dust ring is arranged between the upper seat ring and a step surface which is far away from the lower valve seat and parallel to the axial direction of the upper valve cover;
the first elastic member is disposed on a step adjacent to the lower valve seat.
And the upper seat ring or the upper valve cover is provided with a second groove which is suitable for embedding and fixing the dust blocking ring.
The first elastic piece is locally pressed and contacted with the upper seat ring; a placing space is enclosed among the first elastic piece, the upper seat ring and the corresponding step surface; and an upper pressing ring and a sealing filler are sequentially filled in the placing space along the flow direction of the medium.
The wall surface of the upper seat ring which encloses the placing space is a step surface.
The sealing filler is a graphite gasket.
The first elastic piece is a disc spring.
The support top flange is fixed on the valve body and is suitable for penetrating the valve rod;
an upper shaft sleeve and a lower shaft sleeve are sleeved on the valve rod at intervals; the lower shaft sleeve is arranged at one end close to the ball body; the upper shaft sleeve is embedded in the support top flange; a stuffing box sealing structure is arranged between the upper shaft sleeve and the lower shaft sleeve;
at least one blowout prevention shoulder is provided on the valve stem adapted to interact with the valve body and/or the poppet top flange to prevent blowout of the valve stem by media pressure.
A third groove is formed in the support top flange around the valve rod;
and the thrust gasket is embedded in the third groove and is pressed against the blowout-preventing shaft shoulder of the valve rod.
The third groove and a hole formed in the support top flange and used for the valve rod to penetrate through jointly form a stepped hole.
The utility model discloses technical scheme has following advantage:
1. the utility model provides a high temperature high pressure ball valve sealed firmly, the inner circle of going up the valve gap corresponds the spheroid and sets up at least one-level step, and the inner circle of lower valve gap corresponds the spheroid and sets up at least two-level step. The upper valve seat comprises a first elastic piece which is suitable for applying pretightening force towards the ball body to the upper seat ring. In the lower valve seat, the lower seat ring is fixed on one step of the lower valve cover and is mutually abutted with the step surface to form a sealing surface, the lower pressing ring is fixed on the other adjacent step of the lower valve cover, and the part of the lower pressing ring extends out of the step surface and is suitable for pressing the lower seat ring on the lower valve cover along the flow direction of a medium. The sealing filler is arranged between the lower seat ring and the lower valve cover, the sealing filler is heated to expand under a high-temperature condition to jack the lower seat ring, and is limited by the lower pressing ring, so that the expansion of the sealing filler can seal gaps more tightly, and the sealing property is improved. Meanwhile, due to the limitation of the lower pressing ring, the expansion of the sealing filler cannot cause the axial deviation of the lower valve seat, so that the lower valve seat is prevented from pushing the ball body to reversely extrude the first elastic piece, and the opposite acting force of the upper valve seat and the lower valve seat on the ball body is too large, so that the valve is blocked. The ball body is in hard sealing contact with the upper valve seat and the lower valve seat, other sealing materials are not introduced, and the effective sealing performance under high temperature and high pressure is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a high-temperature high-pressure hard seal ball valve in an embodiment of the present invention;
FIG. 2 is a schematic view of a portion of FIG. 1 at point I;
FIG. 3 is a schematic view of a portion of FIG. 1 at II;
fig. 4 is the utility model discloses in the embodiment of the utility model embodiment the structural schematic diagram of stuffing box seal structure.
Description of reference numerals:
1. a valve body; 21. an upper valve cover; 22. a lower valve cover; 3. a sphere; 4. an upper valve seat; 41. an upper seat ring; 42. a first elastic member; 43. a dust ring; 44. an upper pressing ring; 5. a lower valve seat; 51. a lower seat ring; 52. pressing a ring; 53. a lock washer; 6. a valve stem; 61. an upper shaft sleeve; 62. a lower shaft sleeve; 7. a bracket top flange; 8. a stuffing box sealing structure; 81. pressing a plate; 82. pressing the sleeve; 83. a stuffing box; 84. a second elastic member; 9. a thrust washer; 10. and (5) sealing and filling.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment provides a high temperature high pressure ball valve sealed firmly, as shown in fig. 1, including valve body 1, valve rod 6, spheroid 3, upper valve cover 21 and lower valve cover 22 to and correspond the upper valve seat 4 that sets up with upper valve cover 21, correspond the lower valve seat 5 that sets up with lower valve cover 22, valve rod 6 connects spheroid 3 and wears to establish and fix on valve body 1, spheroid 3 sets up in the valve pocket of valve body 1. The high-temperature high-pressure hard seal ball valve in the embodiment is in a one-way seal mode, the first elastic piece 42 is installed at the upstream end of the medium flowing direction to provide pre-tightening force for the sealing surfaces between the upper valve seat 4 and the ball body 3 and between the lower valve seat 5 and the ball body 3, and the ball body 3 and the upper valve seat 4 and the ball body 3 and the lower valve seat 5 are in hard seal contact.
The inner ring of the lower valve cover 22 is provided with at least two steps corresponding to the ball 3. In this embodiment, as shown in fig. 2, the lower bonnet 22 is correspondingly provided with two steps, the lower valve seat 5 includes a lower seat ring 51 and a lower pressing ring 52, the lower seat ring 51 is fixed on the step of the inner ring of the lower bonnet 22 and is fitted with the surface between the step surfaces in the vertical direction and the horizontal direction, the lower seat ring and the lower pressing ring are mutually abutted to form a sealing surface, the cross section of the lower pressing ring 52 is overall L-shaped, the wider end of the lower pressing ring is fixed on the vertical wall surface of the other step adjacent to the step of the inner ring of the lower bonnet 22 through a fastener (such as a bolt, etc.), and the narrower end of the lower pressing ring extends out of the step and abuts against the lower seat ring 51, so as to press the lower seat ring 51 against the lower bonnet 22. A lock washer 53 is provided on the fastener to improve the stability of the locking.
As shown in fig. 2, a gap is provided between the lower retainer 52 and the lower seat 51 in the axial direction of the lower bonnet 22, and the seal packing 10 is filled in the gap. A first groove is formed in the lower valve cover 22, corresponds to the lower seat ring 51 and is perpendicular to the axial step surface of the lower valve cover 22, the first groove is overlapped with the orthographic projection of the narrower end, extending out of the step surface, of the lower pressing ring 52 on the end surface of the lower valve cover 22, and the sealing filler 10 is also filled in the first groove. In this embodiment, the seal packing 10 is a graphite gasket.
The inner ring of the upper valve cover 21 is provided with at least one step corresponding to the ball 3. In this embodiment, as shown in fig. 3, the upper valve cover 21 is correspondingly provided with two steps, and the upper valve seat 4 includes an upper seat ring 41, a first elastic member 42, a lower pressure ring 52, a sealing packing 10, and a dust ring 43. The upper retainer 41 is arranged on two steps of the upper valve cover 21 in a spanning manner, and a dust blocking ring 43 is arranged between the upper retainer 41 and a step surface which is far away from the lower valve seat 5 and is parallel to the axial direction of the upper valve cover 21. A second groove is formed in the upper seat ring 41 or the upper valve cover 21, and the dust blocking ring 43 is filled and embedded in the second groove. In this embodiment, the second groove is formed in the upper race 41. The dust ring 43 is disposed to effectively block the catalyst powder from entering the placing cavity of the first elastic member 42.
The first elastic member 42 is disposed on the step close to the lower valve seat 5, in this embodiment, the first elastic member 42 is a disc spring, as shown in fig. 3, one side of the disc spring is pressed and fixed on the vertical step surface, the other side of the disc spring is locally pressed and contacted with the upper seat ring 41, a placing space is enclosed between the disc spring and the upper seat ring 41 and between the disc spring and the corresponding horizontal step surface, and the placing space is filled with the upper pressing ring 44 and the sealing filler 10 in sequence along the medium flow direction. Here again, the sealing packing 10 is a graphite gasket. The upper pressing ring 44 presses the sealing packing 10 to prevent the middle chamber medium from entering the placing chamber of the disc spring. The placing cavity of the disc spring is isolated from the outside through the dust blocking ring 43 and the upper pressing ring 44, foreign matters are prevented from entering the placing cavity, the performance of the disc spring is guaranteed, and the service life of the disc spring is prolonged.
As shown in fig. 3, in the present embodiment, the wall surface of the upper seat 41 that surrounds the installation space is a stepped surface. The corresponding upper clamping ring 44 is also arranged in a step shape and is correspondingly attached to the step surface of the upper seat ring 41, so that the fixing is firmer. The contact surface of the upper pressing ring 44 and the sealing filler 10 is arranged to be a slope surface, so that the acting force received along the axial direction of the upper valve cover 21 can be dispersed, the reaction force to the disc spring is reduced, and the performance and the service life of the disc spring are ensured.
Under normal state, under the elastic pretightening force of the disc spring, the upper valve seat 4 is pressed on the ball body 3 to form upper seal, and meanwhile, the ball body 3 is pressed on the lower valve seat 5 to form lower seal. The sealing packing 10 is arranged between the lower seat ring 51 and the lower valve cover 22, the sealing packing 10 expands under the high temperature condition to press the lower seat ring 51 and is limited by the lower pressing ring 52, and the expansion of the sealing packing 10 can seal the gap more tightly, so that the sealing property is improved. Meanwhile, the expansion of the sealing filler 10 cannot cause the axial deviation of the lower valve seat 5 through the limitation of the lower pressing ring 52, so that the situation that the lower valve seat 5 pushes the ball 3 to reversely extrude the disc spring, and the opposite acting force of the upper valve seat 4 and the lower valve seat 5 on the ball 3 is too large, so that the valve is blocked. The disc spring can be prevented from generating elastic fatigue through the limitation of the lower pressing ring 52 on the axial direction of the lower seat ring 51, and the disc spring can provide enough elastic pretightening force under normal temperature and normal pressure or even low temperature environment so as to ensure the sealing performance of the valve under the environment. The ball 3 is in hard sealing contact with the upper valve seat 4 and the lower valve seat 5, other sealing materials are not introduced, and the effective sealing performance under high temperature and high pressure is ensured.
As shown in fig. 1, a support top flange 7 is fixedly arranged outside the valve body 1, one end of the valve rod 6 is fixed on the ball body 3, and the other end of the valve rod penetrates through the support top flange 7. At least one blowout-preventing shoulder is provided on the valve stem 6, which is adapted to interact with the valve body 1 and/or the support top flange 7 to prevent the valve stem 6 from being blown out by the medium pressure. As shown in fig. 4, in this embodiment, two blowout prevention shoulders are provided, as shown in fig. 1, at positions a and B, a thrust washer 9 is provided between the blowout prevention shoulder at position a and the support top flange 7, a third groove is provided on the support top flange 7 around the valve rod 6, the thrust washer 9 is embedded in the third groove in a filling manner, in this embodiment, a stepped hole is formed by the third groove and a hole provided for the valve rod 6 to penetrate through on the support top flange 7, that is, the thrust washer 9 is sleeved on the valve rod 6, and the upper end face is pressed against the inner wall surface of the third groove, the lower end face is pressed against the blowout prevention shoulder at position a, and the valve rod 6 is prevented from being blown out of the valve body 1 by the limitation of the support top flange 7. The blowout prevention shaft shoulder arranged at the position A is arranged outside the valve body 1, so that the influence of high temperature or corrosive media on the thrust washer 9 can be effectively avoided, the service life of the thrust washer 9 is prolonged, and the blowout prevention stability of the valve rod 6 is improved. The blowout-preventing shaft shoulder at the position B is pressed on the stuffing box sealing structure 8, and the stuffing box sealing structure 8 is fixed on the valve body 1 through fasteners such as bolts and the like, so that the auxiliary blowout-preventing function is achieved.
As shown in fig. 4, an upper shaft sleeve 61 and a lower shaft sleeve 62 are sleeved on the valve rod 6 at intervals, the upper shaft sleeve 61 is embedded in the support top flange 7, and a stuffing box sealing structure 8 is arranged between the upper shaft sleeve 61 and the lower shaft sleeve 62. The stuffing box sealing structure 8 includes a pressing plate 81, a pressing sleeve 82, a stuffing box 83, a sealing stuffing 10, and a second elastic member 84. The packing box 83 is sleeved on the valve rod 6 and fixed on the valve body 1, a packing cavity is reserved between the packing box 83 and the valve rod 6, the packing cavity is filled with the sealing packing 10, the pressing sleeve 82 is arranged above the sealing packing 10, and the pressing plate 81 is sleeved on the valve rod 6 and fixed on the packing box 83 through fasteners such as bolts and the like so as to press the pressing sleeve 82 to compress the sealing packing 10. In this embodiment, the second elastic member 84 is disposed on the bolt of the fixed pressing plate 81, the second elastic member 84 is a disc spring, the disc spring is sleeved on the bolt, the bolt extrudes the disc spring to be screwed and fixed on the packing box 83, and the disc spring pre-tightens the sealing packing 10 of the valve rod 6, so as to ensure the sealing performance of the packing of the valve rod 6 during high and low temperature alternation. The lower bushing 62 is embedded in the stuffing box 83 and located below the stuffing chamber. The double-shaft sleeve is designed to ensure the valve switch to operate stably.
In the embodiment, the strength analysis and the sealing ratio design of the valve body 1, the valve seat and the ball body 3 are strictly controlled, so that the valve can meet the technical requirements of 538-DEG C high temperature and application to the working condition of a propane dehydrogenation device (PDH) catalyst.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (13)
1. A high temperature, high pressure, hard seal ball valve comprising: the valve comprises a valve body (1), a valve rod (6), a sphere (3), an upper valve cover (21), a lower valve cover (22), an upper valve seat (4) arranged corresponding to the upper valve cover (21), and a lower valve seat (5) arranged corresponding to the lower valve cover (22), wherein the valve rod (6) is connected with the sphere (3) and is fixedly arranged on the valve body (1) in a penetrating way,
the inner ring of the upper valve cover (21) is provided with at least one step corresponding to the ball body (3); the inner ring of the lower valve cover (22) is provided with at least two steps corresponding to the ball body (3);
the upper seat (4) comprises a first elastic element (42), the first elastic element (42) being suitable for applying a pre-load force to the upper seat (4) towards the ball (3);
the lower valve seat (5) comprises:
a lower seat ring (51) fixed on one step of the lower valve cover (22) and mutually abutted with the step surface to form a sealing surface;
the lower pressing ring (52) is fixed on another adjacent step on the lower valve cover (22), partially extends out of the step surface and is suitable for pressing the lower seat ring (51) on the lower valve cover (22) along the medium flow direction;
a first groove is formed in a step surface, corresponding to the lower seat ring (51), of the lower valve cover (22) and perpendicular to the axial direction of the lower valve cover (22); the first groove is filled with sealing filler (10);
the ball body (3) is in hard sealing contact with the upper valve seat (4) and the lower valve seat (5).
2. A high temperature and high pressure hard seal ball valve according to claim 1, wherein the cross section of the lower clamping ring (52) is L-shaped, and is suitable for being in face fit with the step.
3. A high-temperature high-pressure hard-sealed ball valve according to claim 2, wherein a gap is provided between the lower pressure ring (52) and the lower seat ring (51) in the axial direction of the lower bonnet (22), and the gap is filled with a sealing packing (10).
4. A high temperature and high pressure hard seal ball valve according to claim 3, wherein the upper valve seat (4) further comprises an upper seat ring (41) fixed on at least one step of the upper valve cover (21); the first elastic member (42) is disposed between the corresponding step surface and the upper race (41).
5. A high temperature and high pressure hard seal ball valve according to claim 4,
the upper seat ring (41) is arranged on two steps of the upper valve cover (21) in a spanning mode; a dust blocking ring (43) is arranged between the upper seat ring (41) and a step surface which is far away from the lower valve seat (5) and parallel to the axial direction of the upper valve cover (21);
the first elastic member (42) is disposed on a step adjacent to the lower valve seat (5).
6. A high-temperature high-pressure hard sealing ball valve according to claim 5, characterized in that the upper seat ring (41) or the upper valve cover (21) is provided with a second groove suitable for embedding and fixing the dust-blocking ring (43).
7. A high-temperature high-pressure hard-seal ball valve according to claim 5, wherein the first elastic member (42) is partially pressed in contact with the upper seat ring (41); a placing space is enclosed among the first elastic piece (42), the upper seat ring (41) and the corresponding step surface; and an upper pressing ring (44) and a sealing filler (10) are sequentially filled in the placing space along the flow direction of the medium.
8. A high-temperature high-pressure hard sealing ball valve according to claim 7, characterized in that the wall surface of the upper seat ring (41) enclosing the placing space is a step surface.
9. A high temperature and high pressure hard seal ball valve according to claim 7, wherein the sealing packing (10) is a graphite gasket.
10. A high temperature and high pressure hard seal ball valve according to claim 1, wherein the first elastic member (42) is a disc spring.
11. A high-temperature high-pressure hard sealing ball valve according to claim 1, further comprising a support top flange (7) fixed on the valve body (1) and adapted to penetrate the valve stem (6);
an upper shaft sleeve (61) and a lower shaft sleeve (62) are sleeved on the valve rod (6) at intervals; the lower shaft sleeve (62) is arranged at one end close to the ball body (3); the upper shaft sleeve (61) is embedded in the support top flange (7); a stuffing box sealing structure (8) is arranged between the upper shaft sleeve (61) and the lower shaft sleeve (62);
at least one blowout prevention shoulder is arranged on the valve rod (6) and is suitable for interacting with the valve body (1) and/or the support top flange (7) to prevent the valve rod (6) from being blown out by medium pressure.
12. A high temperature and high pressure hard seal ball valve according to claim 11, wherein the support top flange (7) is provided with a third groove around the valve stem (6);
and the thrust gasket (9) is embedded in the third groove and is pressed against the blowout-preventing shaft shoulder of the valve rod (6).
13. A high temperature and high pressure hard seal ball valve according to claim 12, wherein the third groove and the hole on the support top flange (7) for the valve rod (6) to pass through form a stepped hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120580836.9U CN214743469U (en) | 2021-03-22 | 2021-03-22 | High-temperature high-pressure hard sealing ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120580836.9U CN214743469U (en) | 2021-03-22 | 2021-03-22 | High-temperature high-pressure hard sealing ball valve |
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| Publication Number | Publication Date |
|---|---|
| CN214743469U true CN214743469U (en) | 2021-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120580836.9U Active CN214743469U (en) | 2021-03-22 | 2021-03-22 | High-temperature high-pressure hard sealing ball valve |
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| CN (1) | CN214743469U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115839423A (en) * | 2023-02-02 | 2023-03-24 | 中鸿阀门股份有限公司 | Steel pipe welding ball valve that floats for heating power |
-
2021
- 2021-03-22 CN CN202120580836.9U patent/CN214743469U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115839423A (en) * | 2023-02-02 | 2023-03-24 | 中鸿阀门股份有限公司 | Steel pipe welding ball valve that floats for heating power |
| CN115839423B (en) * | 2023-02-02 | 2023-08-08 | 中鸿阀门股份有限公司 | Steel pipe welding floating ball valve for heating power |
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