CN111207235B - Valve rod dust-proof device of multi-way valve - Google Patents
Valve rod dust-proof device of multi-way valve Download PDFInfo
- Publication number
- CN111207235B CN111207235B CN202010223716.3A CN202010223716A CN111207235B CN 111207235 B CN111207235 B CN 111207235B CN 202010223716 A CN202010223716 A CN 202010223716A CN 111207235 B CN111207235 B CN 111207235B
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- Prior art keywords
- way valve
- end cover
- dust cover
- inner cavity
- cover
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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
- 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)
- Valve Housings (AREA)
Abstract
The invention discloses a valve rod dustproof device of a multi-way valve, and belongs to the technical field of engineering machinery. The multi-way valve end cover is provided with a breathing hole, and the dust cover is connected with the breathing hole of the multi-way valve end cover; the bottom end of the dust cover is provided with a mounting plug, and an inner cavity I is formed in the dust cover; the mounting plug is arranged in the breathing hole of the multi-way valve end cover, and an air passage is arranged in the mounting plug and is communicated with the inner cavity II of the multi-way valve end cover and the inner cavity I of the dust cover. The dust cover is integrated, has low cost and is convenient to install and replace; the dust cover is communicated with the inner cavity II of the multi-way valve end cover, in the valve rod moving process, air in the dust cover passes through the air passage to enter and exit the inner cavity II of the multi-way valve end cover, and meanwhile, the dust cover deforms to reduce the influence of air pressure change on the valve rod operating force, dust and pollutants are prevented from entering the end cover, the anti-pollution capacity of the multi-way valve is enhanced, and the reliability of the whole machine is improved.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a valve rod dustproof device of a multi-way valve.
Background
In the prior art, dust prevention measures are not adopted on the valve cover side of the multi-way valve, because air in the end cover can enter and exit through small holes in the end cover in the movement process of the valve rod, external dust and pollutants enter the end cover, and a dust-proof ring is not adopted on the valve rod seal on the side of the end cover, so that the valve rod is heavy in operation and blocked due to the fact that the valve rod is damaged by the external dust and pollutants.
Disclosure of Invention
The invention provides a valve rod dustproof device of a multi-way valve, which aims to solve the problem of dustproof of the valve rod end cover side of the multi-way valve.
The invention is realized by the following technical scheme: a multi-way valve rod dustproof device is characterized in that a multi-way valve end cover is provided with a breathing hole, and a dustproof cover is connected with the breathing hole of the multi-way valve end cover; the bottom end of the dust cover is provided with a mounting plug, and an inner cavity I is formed in the dust cover; the mounting plug is arranged in the breathing hole of the multi-way valve end cover, and an air passage is arranged in the mounting plug and is communicated with the inner cavity II of the multi-way valve end cover and the inner cavity I of the dust cover.
It is further: the dust cover is made of soft materials; the mounting plug is in interference fit with the breathing hole of the multi-way valve end cover, and is fixedly connected with the breathing hole of the multi-way valve end cover in an expansion mode; the mounting plug is provided with a round table propped against the end cover of the multi-way valve, and the rear side of the round table is provided with an arc-shaped pressing groove.
The dust cover further comprises a bottom plane, cylindrical folds are connected to the bottom plane, top arcs are connected to the folds, and an inner cavity I is formed among the bottom plane, the folds and the top arcs; the mounting plug is connected to the middle position below the bottom plane.
The volume V of the inner cavity I and the maximum displacement y of the valve rod of the multi-way valve accord with the following relation:
；
wherein r is the valve stem radius.
The fold and the maximum displacement y of the valve rod of the multi-way valve accord with the following relation:
；
wherein e is the pleat spacing; r is the radius of the valve rod; n is the number of folds; m is the thickness of the folds; b is the equivalent diameter of the folds.
The displacement x of the valve rod of the multi-way valve and the top arc accord with the following relation:
；；
wherein R is the top arc radius; a is the arc degree of the top arc; r is the radius of the valve rod; b is the top arc width; h is the top arc height;
the top arc width is equal to the fold equivalent diameter.
Compared with the prior art, the invention has the beneficial effects that: the dust cover is integrated, so that the cost is low, and the installation and the replacement are convenient; the dust cover is communicated with the inner cavity II of the multi-way valve end cover, in the valve rod moving process, air in the dust cover passes through the air passage to enter and exit the inner cavity II of the multi-way valve end cover, and meanwhile, the dust cover deforms to reduce the influence of air pressure change on the valve rod operating force, dust and pollutants are prevented from entering the end cover, the anti-pollution capacity of the multi-way valve is enhanced, and the reliability of the whole machine is improved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of a dust cap;
FIG. 3 is a schematic view of dust cap dimensions;
in the figure: 1. a multi-way valve end cover; 2. a dust cover; 2-1, installing a plug; 2-2, pressing the groove; 2-3, a bottom plane; 2-4, wrinkling; 2-5, top arc; 2-6, inner cavity I; 2-7, the air flue.
Detailed Description
The following is a specific embodiment of the present invention, which is further described with reference to the accompanying drawings.
Referring to fig. 1 and 2, a dust-proof device for a valve rod of a multi-way valve is provided with a breathing hole on a multi-way valve end cover 1, and a dust cover 2 is connected with the breathing hole of the multi-way valve end cover 1. The dust cover 2 is made of soft materials, and the dust cover 2 comprises a mounting plug 2-1, a bottom plane 2-3, folds 2-4 and a top arc 2-5 which are connected in sequence. An inner cavity I2-6 is formed among the bottom plane 2-3, the folds 2-4 and the top arc 2-5; the installation plug 2-1 is connected to the middle position below the bottom plane 2-3, and an air passage 2-7 which is communicated with the inner cavity II of the multi-way valve end cover 1 and the inner cavity I2-6 of the dust cover 2 is arranged in the installation plug 2-1. In the valve rod movement process, air in the dust cover passes through the upper air passages 2-7 to enter and exit the inside of the multi-way valve end cover 1, the side face of the dust cover stretches or contracts, the volume changes, the soft material ensures that the internal air pressure of the dust cover is less in the volume change process, and the influence of the dust cover on the valve rod operating force is reduced.
The mounting plug 2-1 is in interference fit with the breathing hole of the multi-way valve end cover 1, and the mounting plug 2-1 is fixedly connected with the breathing hole of the multi-way valve end cover 1 in an expansion mode. The mounting plug 2-1 secures the dust cap while preventing the multi-way valve end cap from breathing Kong Xiushi. The mounting plug 2-1 is provided with a round table propped against the multi-way valve end cover 1, and the rear side of the round table is provided with an arc-shaped pressing groove 2-2. The pressing groove 2-2 is designed to facilitate the installation of the dust cover; during installation, only need press the depression slot, make the installation stopper get into the end cover breathing hole can, can prevent that the dust cover that leads to from taking place to warp at the installation in-process, prevent that its internal pressure from producing the change and influencing valve rod operating force.
In addition, the mounting plug 2-1 can be connected with the multi-way valve end cover 1 in an adhesive mode, or the part of the mounting plug 2-1 is changed into a sleeve type and is connected with the multi-way valve end cover 1 through fasteners such as a throat hoop.
Further, as shown in FIG. 3, an inner cavity I2-6 is formed among the bottom plane 2-3, the folds 2-4 and the top arc 2-5; the top arc 2-5 can be rapidly deformed in the process of rapidly and repeatedly reversing the valve rod in a small range, so that the operating force during rapid operation is reduced, and the repeated deformation and accelerated aging of folds are avoided; the existence of the fold part enables the dust cover to generate larger volume change when the valve core is displaced greatly, and reduces the operating force of the valve rod in the whole reversing process;
for this purpose,
the volume V of the inner cavities I2-6 and the maximum displacement y of the valve rod of the multi-way valve accord with the following relation:
；
the folds 2-4 and the maximum displacement y of the valve rod of the multi-way valve accord with the following relation:
；
the top arc 2-5 accords with the following relation with the valve rod displacement x of the multi-way valve:
；；
wherein, r is the valve rod radius; e is the pleat spacing; n is the number of folds; m is the thickness of the folds; b is the equivalent diameter of the folds; r is the radius of the top arc; a is the arc degree of the top arc; h is the top arc height; the pleat equivalent diameter b is equal to the top arc width.
Claims (2)
1. A multi-way valve rod dust keeper, its characterized in that: the multi-way valve end cover (1) is provided with a breathing hole, and the dust cover (2) is connected with the breathing hole of the multi-way valve end cover (1); the bottom end of the dust cover (2) is provided with a mounting plug (2-1), and an inner cavity I (2-6) is formed in the dust cover (2); the mounting plug (2-1) is arranged in a breathing hole of the multi-way valve end cover (1), an air passage (2-7) is formed in the mounting plug (2-1), and the air passage (2-7) is communicated with an inner cavity II of the multi-way valve end cover (1) and an inner cavity I (2-6) of the dust cover (2);
the dust cover (2) further comprises a bottom plane (2-3), a cylindrical fold (2-4) is connected to the bottom plane (2-3), a top arc (2-5) is connected to the fold (2-4), and an inner cavity I (2-6) is formed among the bottom plane (2-3), the fold (2-4) and the top arc (2-5); the mounting plug (2-1) is connected to the lower middle part of the bottom plane (2-3);
the volume V of the inner cavity I (2-6) and the maximum displacement y of the valve rod of the multi-way valve accord with the following relation:
；
wherein, r is the valve rod radius;
the folds (2-4) and the maximum displacement y of the valve rod of the multi-way valve accord with the following relation:
；
wherein e is the pleat spacing; n is the number of folds; m is the thickness of the folds; b is the equivalent diameter of the folds;
the top arc (2-5) accords with the following relation with the valve rod displacement x of the multi-way valve:
；/>；
wherein R is the top arc radius; a is the arc degree of the top arc; the top arc width is equal to the equivalent diameter of the folds; h is the top arc height.
2. The multi-way valve stem dust guard of claim 1, wherein: the dust cover (2) is made of soft materials; the mounting plug (2-1) is in interference fit with the breathing hole of the multi-way valve end cover (1), and the mounting plug (2-1) is fixedly connected with the breathing hole of the multi-way valve end cover (1) in an expansion mode; the mounting plug (2-1) is provided with a round table propped against the multi-way valve end cover (1), and the rear side of the round table is provided with an arc-shaped pressing groove (2-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010223716.3A CN111207235B (en) | 2020-03-26 | 2020-03-26 | Valve rod dust-proof device of multi-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010223716.3A CN111207235B (en) | 2020-03-26 | 2020-03-26 | Valve rod dust-proof device of multi-way valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111207235A CN111207235A (en) | 2020-05-29 |
| CN111207235B true CN111207235B (en) | 2023-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010223716.3A Active CN111207235B (en) | 2020-03-26 | 2020-03-26 | Valve rod dust-proof device of multi-way valve |
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| Country | Link |
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| CN (1) | CN111207235B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3728122A1 (en) * | 1987-08-22 | 1989-03-02 | Bosch Gmbh Robert | Double-acting protective seal |
| CN2123623U (en) * | 1992-01-28 | 1992-12-02 | 赵前锋 | Plastic aspirating apparatus |
| CN201610972U (en) * | 2009-12-08 | 2010-10-20 | 福田雷沃国际重工股份有限公司 | Sealing device for valve rod of multi-way valve |
| CN204062093U (en) * | 2014-03-18 | 2014-12-31 | 山东临工工程机械有限公司 | Loader multiple directional control valve dustproof construction |
| CN205479590U (en) * | 2016-01-18 | 2016-08-17 | 宁波市日安电器有限公司 | Special anticorrosive type solenoid valve |
| CN208169406U (en) * | 2018-03-07 | 2018-11-30 | 湖北故联实业股份有限公司 | A kind of automobile shock dust plug |
| CN211852957U (en) * | 2020-03-26 | 2020-11-03 | 徐工集团工程机械股份有限公司科技分公司 | Multi-way valve rod dust keeper |
-
2020
- 2020-03-26 CN CN202010223716.3A patent/CN111207235B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3728122A1 (en) * | 1987-08-22 | 1989-03-02 | Bosch Gmbh Robert | Double-acting protective seal |
| CN2123623U (en) * | 1992-01-28 | 1992-12-02 | 赵前锋 | Plastic aspirating apparatus |
| CN201610972U (en) * | 2009-12-08 | 2010-10-20 | 福田雷沃国际重工股份有限公司 | Sealing device for valve rod of multi-way valve |
| CN204062093U (en) * | 2014-03-18 | 2014-12-31 | 山东临工工程机械有限公司 | Loader multiple directional control valve dustproof construction |
| CN205479590U (en) * | 2016-01-18 | 2016-08-17 | 宁波市日安电器有限公司 | Special anticorrosive type solenoid valve |
| CN208169406U (en) * | 2018-03-07 | 2018-11-30 | 湖北故联实业股份有限公司 | A kind of automobile shock dust plug |
| CN211852957U (en) * | 2020-03-26 | 2020-11-03 | 徐工集团工程机械股份有限公司科技分公司 | Multi-way valve rod dust keeper |
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| Publication number | Publication date |
|---|---|
| CN111207235A (en) | 2020-05-29 |
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