CN213541497U - Pressure equalizing device for inner cavity of packing box of valve rod of control valve - Google Patents
Pressure equalizing device for inner cavity of packing box of valve rod of control valve Download PDFInfo
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- CN213541497U CN213541497U CN202022350030.9U CN202022350030U CN213541497U CN 213541497 U CN213541497 U CN 213541497U CN 202022350030 U CN202022350030 U CN 202022350030U CN 213541497 U CN213541497 U CN 213541497U
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- pressure equalizing
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- valve rod
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Abstract
The utility model relates to a control valve rod stuffing box inner chamber pressure equalizing device, including valve body and valve rod, the cover is equipped with gland packing on the valve rod, gland packing with valve body inner wall sealing connection, the valve body both ends all are provided with the valve gap, the valve gap be suitable for with gland packing offsets, be provided with the pressure equalizing part between the gland packing, the pressure equalizing part cover is established on the valve rod, the internal diameter of pressure equalizing part is greater than the diameter of valve rod, the external diameter of pressure equalizing part equals the internal diameter of valve body, set up the channel that is used for the unblocked of fluid on the pressure equalizing part, be provided with pressure interface on the valve body, pressure interface with valve body through connection. The utility model provides a circular smooth channel through the pressure equalizing part, thus realizing smooth fluid; any leakage point appears along the annular direction, the whole groove is filled with fluid, annular pressure equalizing is formed, and the implementation consistency of pressure measurement is facilitated.
Description
Technical Field
The utility model relates to a control valve technical field specifically is a control valve rod packing box inner chamber pressure-equalizing device.
Background
High-end control valves are usually used in a large number under the working conditions of high temperature, high pressure difference, corrosion and high erosion, are key and core components in the process industry, and generally need to be filled with sealing filler to ensure the reliable operation of the valves so as to meet the sealing requirements of the valves.
Because the smooth finish of valve body interior way and valve rod and the homogeneity of packing self, probably cause along packing and the annular pressure homogeneity difference of way and valve rod, cause easily that the measuring hole blocks up to influence the measuring accuracy.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: in order to solve the problem, the utility model provides a control valve rod packing box inner chamber voltage-sharing device for the fluid short circuit in week of voltage-sharing parts plays and converges and the voltage-sharing effect, is difficult for blockking up.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a pair of control valve rod stuffing box inner chamber pressure equalizing device, including valve body and valve rod, the cover is equipped with gland packing on the valve rod, gland packing with valve body inner wall sealing connection, the valve body both ends all are provided with the valve gap, the valve gap be suitable for with gland packing offsets, be provided with the pressure equalizing part between the gland packing, the pressure equalizing part cover is established on the valve rod, the internal diameter of pressure equalizing part is greater than the diameter of valve rod, the external diameter of pressure equalizing part equals the internal diameter of valve body makes the pressure equalizing part is in not tied along axial motion in the valve body, set up the channel that is used for the fluid unblocked on the pressure equalizing part, be provided with pressure interface on the valve body, pressure interface with valve body through connection.
Fluid enters the packing through the pressure interface and axially spreads along the packing gap, and because of the surface finish of the valve body and the valve rod and the uniformity of the packing, the pressure uniformity difference along the annular directions of the packing, the valve body and the valve rod is possibly caused, partial local leakage can occur on the same annular surface, and partial local leakage cannot occur; through the pressure equalizing part, any leakage can be caused in the whole ring, so that the test consistency is greatly improved; meanwhile, the ring of each stage plays the role of a collecting pipe, when the ring penetrates into the next stage, the pressure in the ring is consistent, and the test stability is much better.
Further, the pressure equalizing part comprises a first annular sheet and a second annular sheet which are welded through resistance welding, the outer side surfaces of the first annular sheet and the second annular sheet are both abutted against the sealing filler, and a first annular notch and a second annular notch which are coaxial are symmetrically formed in the second annular sheet. The first annular sheet and the second annular sheet are welded together to form a groove along the radial direction, so that the whole pressure equalizing part is smooth in fluid, any leakage point appears along the annular direction, the whole groove is filled with the fluid to form annular pressure equalization, and the implementation consistency of pressure measurement is facilitated.
The utility model has the advantages that: the utility model provides a pressure equalizing device for the inner cavity of a stuffing box of a valve rod of a control valve, which provides a circular smooth channel through a pressure equalizing part to realize smooth fluid; any leakage point appears along the annular direction, the whole groove is filled with fluid, annular pressure equalizing is formed, and the implementation consistency of pressure measurement is facilitated.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is an enlarged schematic view of a pressure equalizing member;
FIG. 3 is a schematic view of the structure of a first ring segment;
FIG. 4 is a schematic structural view of a second annular sheet;
in the figure: 1-pressure equalizing part, 2-valve cover, 3-valve body, 4-sealing filler, 5-valve rod, 6-pressure interface, 7-first annular sheet, 8-second annular sheet, 81-first annular gap and 82-second annular gap.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 1, the utility model provides a pair of control valve rod stuffing box inner chamber pressure equalizing device, including valve body 3 and valve rod 5, the cover is equipped with gland packing 4 on the valve rod 5, gland packing 4 with 3 inner wall sealing connection of valve body, 3 both ends of valve body all are provided with valve gap 2, valve gap 2 be suitable for with gland packing 4 offsets, be provided with pressure equalizing part 1 between gland packing 4, pressure equalizing part 1 cover is established on the valve rod 5, pressure equalizing part 1's internal diameter is greater than the diameter of valve rod 5, pressure equalizing part 1's external diameter equals the internal diameter of valve body 3, the channel that is used for the fluid unblocked is offered on the pressure equalizing part 1, be provided with pressure interface 6 on the valve body 3, pressure interface 6 with 3 through connections of valve body.
As shown in fig. 1 to 4, the pressure equalizing member 1 includes a first annular plate 7 and a second annular plate 8 welded by resistance welding, outer side surfaces of the first annular plate 7 and the second annular plate 8 are both abutted to the sealing filler 4, and the second annular plate 8 is symmetrically provided with a first annular notch 81 and a second annular notch 82 which are coaxial.
The pressure equalizing component 1 adopts two ring sheets, and the inner rings of the two ring sheets are consistent with the diameter of the valve rod 5 and slightly larger than the diameter of the valve rod 5; the outer ring has the same inner diameter with the valve body 3 and has a slightly smaller size, so that the outer ring is not constrained to move along the axial direction in the channel of the valve body 3; meanwhile, the first annular sheet 7 and the second annular sheet 8 are welded together to form a groove along the radial direction, so that the whole pressure equalizing part 1 is free from fluid, any leakage point appears along the annular direction, the whole groove is filled with fluid to form annular pressure equalization, and the implementation consistency of pressure measurement is facilitated.
The utility model provides a pressure equalizing device for the inner cavity of a stuffing box of a valve rod of a control valve, which provides a circular smooth channel through a pressure equalizing part to realize smooth fluid; any leakage point appears along the annular direction, the whole groove is filled with fluid, annular pressure equalizing is formed, and the implementation consistency of pressure measurement is facilitated.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (2)
1. The utility model provides a control valve rod stuffing box inner chamber pressure-equalizing device which characterized in that: the pressure-equalizing valve comprises a valve body (3) and a valve rod (5), wherein a sealing filler (4) is sleeved on the valve rod (5), the sealing filler (4) is in sealing connection with the inner wall of the valve body (3), valve covers (2) are arranged at two ends of the valve body (3), the valve covers (2) are suitable for being abutted to the sealing filler (4), a pressure-equalizing part (1) is arranged between the sealing filler (4), the pressure-equalizing part (1) is sleeved on the valve rod (5), the inner diameter of the pressure-equalizing part (1) is larger than that of the valve rod (5), the outer diameter of the pressure-equalizing part (1) is equal to that of the valve body (3), a channel for smooth fluid is formed in the pressure-equalizing part (1), a pressure interface (6) is arranged on the valve body (3), and the pressure interface (6) is in through connection with the valve body (3).
2. The control valve stem stuffing box cavity pressure equalizing device according to claim 1, wherein: the pressure equalizing part (1) comprises a first annular sheet (7) and a second annular sheet (8) welded through resistance welding, the outer side surfaces of the first annular sheet (7) and the second annular sheet (8) are respectively abutted to the sealing filler (4), and a first annular notch (81) and a second annular notch (82) which are coaxial are symmetrically formed in the second annular sheet (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022350030.9U CN213541497U (en) | 2020-10-21 | 2020-10-21 | Pressure equalizing device for inner cavity of packing box of valve rod of control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022350030.9U CN213541497U (en) | 2020-10-21 | 2020-10-21 | Pressure equalizing device for inner cavity of packing box of valve rod of control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213541497U true CN213541497U (en) | 2021-06-25 |
Family
ID=76499128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022350030.9U Active CN213541497U (en) | 2020-10-21 | 2020-10-21 | Pressure equalizing device for inner cavity of packing box of valve rod of control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213541497U (en) |
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2020
- 2020-10-21 CN CN202022350030.9U patent/CN213541497U/en active Active
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