CN112283441A - Use method of multistage expansion curing device for inner cavity of control valve stem packing box - Google Patents
Use method of multistage expansion curing device for inner cavity of control valve stem packing box Download PDFInfo
- Publication number
- CN112283441A CN112283441A CN202011126124.6A CN202011126124A CN112283441A CN 112283441 A CN112283441 A CN 112283441A CN 202011126124 A CN202011126124 A CN 202011126124A CN 112283441 A CN112283441 A CN 112283441A
- Authority
- CN
- China
- Prior art keywords
- sealing filler
- expansion ring
- sealing
- inner cavity
- ring component
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
- F16K41/04—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The invention relates to a use method of a multistage expansion curing device for an inner cavity of a stuffing box of a valve rod of a control valve, which comprises the following steps: s1: sleeving the sealing filler and the expansion ring part on the valve rod at intervals, inserting the valve rod into the valve body, and sealing and abutting the sealing filler against the inner wall of the valve body; s2: the pressure pump penetrates through an injection port arranged on the valve body and is communicated with the expansion ring component; s3: when the sealing filler leaks, the pressure of the valve cavity is released, and a medium is injected into the expansion ring component through the pressure pump; s4: standing, and waiting for the medium to be solidified; 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 invention relates to a control valve sealing device, in particular to a multistage expansion curing device for an inner cavity of a stuffing box of a valve rod of a control valve.
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;
how to operate the sealing filler to improve the sealing performance of the sealing filler becomes a problem which needs to be solved urgently by researchers of the company.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to operate can improve the sealing performance of the sealing filler;
in order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a using method of a multistage expansion curing device for an inner cavity of a stuffing box of a valve rod of a control valve, which comprises the following steps:
s1: sleeving the sealing filler and the expansion ring part on the valve rod at intervals, inserting the valve rod into the valve body, and sealing and abutting the sealing filler against the inner wall of the valve body;
s2: the pressure pump penetrates through an injection port arranged on the valve body and is communicated with the expansion ring component;
s3: when the sealing filler leaks, the pressure of the valve cavity is released, and a medium is injected into the expansion ring component through the pressure pump;
s4: and standing, and waiting for the medium to be solidified.
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;
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 specific structure of the expansion ring component, the invention adopts the expansion ring component comprising 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.
In the invention, the medium adopts AB glue, and has the advantages of very good fluidity, low viscosity, being close to water and easy to fill in during the mixing and injecting process, and is easy to expand the expansion ring part; in addition, the AB glue can be cured within 24 hours, has certain elasticity after being cured, and the elastic modulus can be lower than 300MPa, so that the mixed glue cannot excessively permeate into the filler and form a hardened entity, and meanwhile, the AB glue is not easy to leak after being cured; the AB glue is also poor in bonding performance with metal, so that the relative movement of the valve rod is not influenced.
The invention has the beneficial effects that: the invention relates to a using method of a multistage expansion curing device for an inner cavity of a packing box of a control valve stem.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of an expansion ring component 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 views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in figure 1, the invention is a method for using a multistage expansion curing device for an inner cavity of a stuffing 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 member, the present invention employs an expansion ring member 5 comprising a first annular plate 51, a second annular plate 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 invention relates to a multistage expansion curing device for an inner cavity of a packing box of a control valve stem.
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;
set up a plurality of injection interfaces, when certain department of sealing filler takes place to reveal, in time through the expansion ring part injection medium to being close to the department of revealing for the expansion ring part takes place to expand, improves sealing medium's sealing performance.
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 description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art 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 (3)
1. The use method of the multistage expansion curing device for the inner cavity of the stuffing box of the valve rod of the control valve is characterized in that: comprises the following steps:
s1: sleeving a sealing filler and an expansion ring component on a valve rod at intervals, inserting the valve rod into the valve body, and sealing and abutting the sealing filler against the inner wall of the valve body;
s2: the pressure pump penetrates through an injection port formed in the valve body and is in through connection with the expansion ring component;
s3: when the sealing filler leaks, releasing the pressure of the valve cavity, and injecting a medium into the expansion ring component through the pressure pump;
s4: and standing, and waiting for the medium to be solidified.
2. The use method of the multistage expansion curing device for the inner cavity of the stuffing box of the control valve stem according to claim 1, is characterized in that: 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.
3. The use method of the multistage expansion curing device for the inner cavity of the stuffing box of the control valve stem according to claim 1, is characterized in that: the medium is AB glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011126124.6A CN112283441A (en) | 2020-10-20 | 2020-10-20 | Use method of multistage expansion curing device for inner cavity of control valve stem packing box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011126124.6A CN112283441A (en) | 2020-10-20 | 2020-10-20 | Use method of multistage expansion curing device for inner cavity of control valve stem packing box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112283441A true CN112283441A (en) | 2021-01-29 |
Family
ID=74424487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011126124.6A Pending CN112283441A (en) | 2020-10-20 | 2020-10-20 | Use method of multistage expansion curing device for inner cavity of control valve stem packing box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112283441A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4177998A (en) * | 1978-08-25 | 1979-12-11 | Acf Industries, Incorporated | Packing gland assembly |
| US5024453A (en) * | 1988-12-20 | 1991-06-18 | Pressure Services, Inc. | Liveload assembly for rotary or reciprocating shaft packing |
| US5908046A (en) * | 1997-03-12 | 1999-06-01 | Erc Industries, Inc. | Back seat rising stem gate valve |
| CN103968148A (en) * | 2014-04-10 | 2014-08-06 | 上海威含德石油机械设备有限公司 | On line plugging method for leakage flat plate valve |
| CN110118264A (en) * | 2019-05-14 | 2019-08-13 | 苏州博雷特流体控制有限公司 | A method of the high-performance expansion sluice valve with back seal function and replacement filler |
-
2020
- 2020-10-20 CN CN202011126124.6A patent/CN112283441A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4177998A (en) * | 1978-08-25 | 1979-12-11 | Acf Industries, Incorporated | Packing gland assembly |
| US5024453A (en) * | 1988-12-20 | 1991-06-18 | Pressure Services, Inc. | Liveload assembly for rotary or reciprocating shaft packing |
| US5908046A (en) * | 1997-03-12 | 1999-06-01 | Erc Industries, Inc. | Back seat rising stem gate valve |
| CN103968148A (en) * | 2014-04-10 | 2014-08-06 | 上海威含德石油机械设备有限公司 | On line plugging method for leakage flat plate valve |
| CN110118264A (en) * | 2019-05-14 | 2019-08-13 | 苏州博雷特流体控制有限公司 | A method of the high-performance expansion sluice valve with back seal function and replacement filler |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210129 |
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| RJ01 | Rejection of invention patent application after publication |