CN213541494U - Multistage expansion curing device for inner cavity of packing box of valve rod of control valve - Google Patents
Multistage expansion curing device for inner cavity of packing box of valve rod of control valve Download PDFInfo
- Publication number
- CN213541494U CN213541494U CN202022347918.7U CN202022347918U CN213541494U CN 213541494 U CN213541494 U CN 213541494U CN 202022347918 U CN202022347918 U CN 202022347918U CN 213541494 U CN213541494 U CN 213541494U
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- sealing
- valve
- valve rod
- expansion ring
- sealing filler
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Abstract
The utility model relates to a multistage expansion curing device for an inner cavity of a packing box of a valve rod of a control valve, which comprises a valve body and a valve rod; the valve rod is sleeved with a sealing filler, and the sealing filler is connected with the inner wall of the valve body in a sealing way; valve covers are arranged at two ends of the valve body and are suitable for abutting against the sealing filler; an expansion ring component is arranged between the sealing fillers and sleeved on the valve rod; the valve body is provided with an injection interface which is communicated with the expansion ring component; when a medium is injected into the injection interface, the expansion ring component expands along the axial direction of the valve rod and extrudes the sealing filler; by adding the expansion ring component at the sealing filler, when the sealing filler leaks, the expansion ring component expands to extrude the sealing filler, so that the radial pressing force of the sealing filler is increased, and the sealing property of the high-sealing filler is improved.
Description
Technical Field
The utility model relates to a control valve sealing device specifically is a control valve rod packing box inner chamber multistage expansion solidification equipment.
Background
In order to prevent leakage of hydraulic oil at a gap between a valve rod and a valve body, it is a conventional practice to add a sealing packing at the gap between the valve rod and the valve body; however, in the long-term use process of the control valve, the sealing filler can be damaged or aged, and the sealing performance of the whole control valve is further influenced;
in conclusion, how to improve the sealing performance of the sealing filler becomes a problem which needs to be solved urgently by researchers of the company.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: how the sealing performance of the sealing filler can be improved;
in order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model relates to a multistage expansion curing device for an inner cavity of a packing box of a valve rod of a control valve, which comprises a valve body and a valve rod; the valve rod is sleeved with a sealing filler, and the sealing filler is connected with the inner wall of the valve body in a sealing way; valve covers are arranged at two ends of the valve body and are suitable for abutting against the sealing filler; an expansion ring component is arranged between the sealing fillers and sleeved on the valve rod; the valve body is provided with an injection interface which is communicated with the expansion ring component; when a medium is injected into the injection interface, the expansion ring component expands along the axial direction of the valve rod and extrudes the sealing filler;
the valve cover is fixed on two sides of the valve body and used for limiting the sealing filler; when the sealing filler leaks, a medium is injected into the expansion ring component through the injection interface, the expansion ring component expands, and axial movement occurs.
In order to concretely explain the concrete structure of the expansion ring component, the expansion ring component comprises a first annular sheet and a second annular sheet; the outer side surfaces of the first annular sheet and the second annular sheet are abutted against the sealing filler; the second annular sheet is convexly provided with a vertical wall which is abutted against the inner side of the first annular sheet so as to form an inner cavity communicated with the injection port;
the outer side surfaces of the first annular sheet and the second annular sheet are abutted against the sealing filler, a vertical wall is arranged between the two inner side surfaces, and an inner cavity gap for a medium to enter is formed by the vertical wall; when the medium enters, the medium is filled in the inner cavity, and then the medium is continuously introduced, the first annular sheet and the second annular sheet are gradually far away from each other to expand.
The utility model has the advantages that: the utility model relates to a multistage inflation solidification equipment of control valve rod packing box inner chamber through increasing the expansion ring part in seal packing department, when seal packing takes place to reveal, the expansion ring part inflation, and then extrudees seal packing, has increased seal packing's radial packing force to high seal packing's leakproofness has been improved.
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 a schematic structural view of the expansion ring member of the present invention;
in the figure: 1-valve body, 2-valve rod, 3-sealing packing, 4-valve cover, 5-expansion ring component, 51-first annular sheet, 52-second annular sheet, 53-vertical wall, 54-inner cavity, 6-injection interface and 7-pressure pump.
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 figure 1, the utility model relates to a multistage expansion curing device for an inner cavity of a packing box of a valve rod of a control valve, which comprises a valve body 1 and a valve rod 2; the valve rod 2 is sleeved with a sealing filler 3, and the sealing filler 3 is connected with the inner wall of the valve body 1 in a sealing way; valve covers 4 are arranged at two ends of the valve body 1, and the valve covers 4 are suitable for abutting against the sealing packing 3; an expansion ring part 5 is arranged between the sealing fillers 3, and the expansion ring part 5 is sleeved on the valve rod 2; an injection port 6 is formed in the valve body 1, and the injection port 6 is communicated with the expansion ring component 5; when a medium is injected into the injection interface 6, the expansion ring component 5 expands along the axial direction of the valve rod 2 and extrudes the sealing packing 3;
the valve cover is fixed on two sides of the valve body and used for limiting the sealing filler; when the sealing filler leaks, a medium is injected into the expansion ring component through the injection interface, the expansion ring component expands, and axial movement occurs.
As shown in fig. 2, in order to specifically explain the specific structure of the expansion ring component, the present invention adopts the expansion ring component 5 comprising a first annular sheet 51, a second annular sheet 52; the outer side surfaces of the first annular sheet 51 and the second annular sheet 52 are respectively abutted against the sealing filler 3; a standing wall 53 is convexly arranged on the second annular sheet 52, and the standing wall 53 is abutted against the inner side of the first annular sheet 51 to form an inner cavity 54 communicated with the injection port 6;
the outer side surfaces of the first annular sheet and the second annular sheet are abutted against the sealing filler, a vertical wall is arranged between the two inner side surfaces, and an inner cavity gap for a medium to enter is formed by the vertical wall; when the medium enters, the medium is filled in the inner cavity, and then the medium is continuously introduced, the first annular sheet and the second annular sheet are gradually far away from each other to expand.
The utility model relates to a multistage inflation solidification equipment of control valve rod packing box inner chamber through increasing the expansion ring part in seal packing department, when seal packing takes place to reveal, the expansion ring part inflation, and then extrudees seal packing, has increased seal packing's radial packing force to high seal packing's leakproofness has been improved.
In this embodiment, a plurality of injection ports 6 and a plurality of corresponding expansion ring members 5 may be provided, and the injection ports 6 may be connected to the pressure pump 7 to inject media into the inner cavity 54;
the medium can adopt AB glue, and after the AB glue is injected and solidified, continuous pressure does not need to be provided at the injection interface.
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 multistage expansion solidification equipment of control valve rod stuffing box inner chamber which characterized in that: comprises a valve body and a valve rod;
the valve rod is sleeved with a sealing filler, and the sealing filler is connected with the inner wall of the valve body in a sealing manner;
valve covers are arranged at two ends of the valve body and are suitable for abutting against the sealing filler;
an expansion ring component is arranged between the sealing fillers and sleeved on the valve rod;
the valve body is provided with an injection interface which is communicated with the expansion ring component;
when a medium is injected into the injection interface, the expansion ring component expands along the axial direction of the valve rod and presses the sealing packing.
2. The multistage expansion curing device for the inner cavity of the stuffing box of the valve stem of the control valve according to claim 1, wherein: the expansion ring component comprises a first annular sheet and a second annular sheet;
the outer side surfaces of the first annular sheet and the second annular sheet are abutted to the sealing filler;
and a vertical wall is convexly arranged on the second annular sheet and abuts against the inner side of the first annular sheet to form an inner cavity communicated with the injection interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022347918.7U CN213541494U (en) | 2020-10-20 | 2020-10-20 | Multistage expansion curing device for inner cavity of packing box of valve rod of control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022347918.7U CN213541494U (en) | 2020-10-20 | 2020-10-20 | Multistage expansion curing device for inner cavity of packing box of valve rod of control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213541494U true CN213541494U (en) | 2021-06-25 |
Family
ID=76499023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022347918.7U Active CN213541494U (en) | 2020-10-20 | 2020-10-20 | Multistage expansion curing device for inner cavity of packing box of valve rod of control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213541494U (en) |
-
2020
- 2020-10-20 CN CN202022347918.7U patent/CN213541494U/en active Active
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