CN203500599U - Pressure reducing valve with filtering and backflow-prevention functions - Google Patents
Pressure reducing valve with filtering and backflow-prevention functions Download PDFInfo
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- CN203500599U CN203500599U CN201320630093.7U CN201320630093U CN203500599U CN 203500599 U CN203500599 U CN 203500599U CN 201320630093 U CN201320630093 U CN 201320630093U CN 203500599 U CN203500599 U CN 203500599U
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Abstract
The utility model relates to a pressure reducing valve with the filtering and backflow-prevention functions, and belongs to the technical field of a pressure reducing valve structure improvement. The pressure reducing valve comprises a valve body with an outlet channel and an inlet channel, a valve element assembly is installed in the valve body, and a pressure adjustment device is installed above the valve element assembly. The valve element assembly comprises a valve element frame fixedly installed in the valve body, the lower end of the valve element frame is located in a containing cavity of the valve body, a valve element capable of moving up and down is installed in a longitudinal through hole in the middle of the valve element frame, the lower end of the valve element downwards extends outside the valve element frame, a sealing base is installed at the bottom end of the valve element, two symmetrically-formed through grooves are formed in the middle of a wall body of the valve element frame and communicated with the inlet channel of the valve body and an outlet of the bottom end of the longitudinal through hole of the valve element frame, a filtering net is installed in the circumferential direction of the inner lateral wall of the containing cavity of the valve body, and a check valve assembly is installed in the outlet channel of the valve body in a matched mode. The pressure reducing valve with the filtering and backflow-prevention functions is simple in structure, small in size and long in service life.
Description
Technical field
The utility model relates to a kind of reduction valve with filtration, anti-back flow function, belongs to the improved technical field of structure of relief pressure valve.
Background technique
Reduction valve is applied in flowing medium pipeline control system, for pipeline fluid medium is reduced to needed convenient pressure at a high pressure, guarantees the stability of outlet pressure simultaneously.At present, reduction valve, except the type of conventional structure, also comprises the reduction valve with anti-back flow function, with reduction valve of filtering function etc.But, in prior art, with the reduction valve of anti-back flow function, there is complex structure, volume is bigger than normal, working life is short problem; Also there is complex structure, volume problem bigger than normal in the reduction valve with filtering function, but also not anti-medium refluence function can not prevent the pollution of downstream media to upstream medium.
Model utility content
The purpose of this utility model be to provide a kind of simple in structure, volume is little, the reduction valve with filtration, anti-back flow function of long service life.
For achieving the above object, the technological scheme that the utility model adopts is:
A kind of have a filtration, the reduction valve of anti-back flow function, comprise the valve body with outlet passage and inlet passage, mangetic core assembly is installed in valve body, the top of mangetic core assembly is provided with pressure regulator, described mangetic core assembly comprises the valve core frame being fixedly mounted in valve body, valve core frame lower end is positioned at the holding cavity of valve body, in longitudinal hole in the middle of valve core frame, spool moving up and down is installed, spool lower end extends downward outside valve core frame, and spool bottom is provided with sealing seat (sealing seat can be used for the bottom outlet of valve core frame longitudinal hole to seal), on the middle part wall body of valve core frame, offer two symmetrically arranged grooves, and groove is connected with the inlet passage of valve body and the outlet of the bottom of valve core frame longitudinal hole, the week of the holding cavity madial wall of valve body is upwards provided with filter screen, in the outlet passage of valve body, coordinate check valve assembly is installed.
As the further setting of such scheme, described check valve assembly comprises check valve body, safety check flap, compression spring, pad, back-up ring; Check valve body is the cylindrical structural that axis horizontal arranges, its outer wall and outlet passage inwall are closely fixedly installed, and the centre of check valve body is provided with through hole, and through hole right part is internal conical surface, in the middle of check valve body left side, be provided with stiffening rib, in the middle of stiffening rib left end, convex with cylindrical tube; Safety check flap comprises the lid that is coated with rubber on outer wall and is sealed and matched mutually with the internal conical surface of through hole right part, the left side of lid is provided with the cylinder boss through cylindrical tube, back-up ring, pad, compression spring are arranged on cylinder boss successively from left to right, and compression spring is between pad right side and cylindrical tube left side.
On the outer wall of described check valve body, offer groove, in groove, be equipped with O shape circle.
In the upper-end surface of described sealing seat, be equipped with rectangular seal, rectangular seal flushes with the upper-end surface of sealing seat.
Between described sealing seat and spool, be threaded connection.
The holding cavity bottom of described valve body is sealed by end cap, and is threaded connection between end cap and valve body.
Described end cap is provided with tapped through hole, and what coordinate with this tapped through hole is plug.
Described pressure regulator comprises voltage regulation screw and the main spring being arranged in valve gap; Between valve gap outer wall and valve interior wall, be threaded connection, and valve gap presses valve core frame top; Main spring holding is between voltage regulation screw and spool top.
The utlity model has following advantage:
1. simplify valve core frame and valve core structure, change valve core frame and spool into integrative-structure by two-layer configuration, the length of shortening valve core frame intermediate hole supporting part, makes valve rod reduce moving up and down middle frictional force, and processing and assembly process process good.
2. change check valve assembly structure, simplify check valve assembly structure, check valve body and valve rod supporting part are integrated, and the designs simplification of valve body, technology capability is good, and rubber is directly vulcanized on flap, compact structure, caulking gum difficult drop-off, makes safety check amount of parts reduce like this, convenient installation.
3. filter screen is directly installed between flap and end cap, compact structure, cleaning for convenience detach, reduces the volume of whole product, and be provided with slag exhausting mouth on end cap, can utilize current deslagging, reduces the cleaning dismounting number of times of filter screen.
4. in valve body, be provided with one-level non-return structure, flow resistance greatly reduces, and downstream pressure loss is little, and after valve, flow is larger.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the structural representation of mangetic core assembly in Fig. 1;
Fig. 3 is that the A-A of Fig. 2 is to sectional structure schematic diagram;
Fig. 4 is the structural representation of check valve assembly in Fig. 1;
Fig. 5 is the structural representation of check valve body in Fig. 4;
Fig. 6 is the left TV structure schematic diagram of Fig. 5;
Fig. 7 is the fixed structure of filter screen in the utility model and the linkage structure schematic diagram between end cap and valve body;
Fig. 8 is the structural representation that the utility model medium flows to.
Embodiment
As shown in Figure 1, a kind of reduction valve with filtration, anti-back flow function of the utility model, comprises with the valve body 1 of outlet passage 31 and inlet passage 32, in valve body 1, mangetic core assembly is installed, the top of mangetic core assembly is provided with pressure regulator.
Shown in Fig. 2, Fig. 3, mangetic core assembly comprises the valve core frame 10 being fixedly mounted in valve body 1, and valve core frame 10 lower ends are positioned at the holding cavity 33 of valve body 1.Valve core frame 10 is the many boss structures of a cylinder, O shape circle 23, O shape circle 21, O shape circle 18 is housed on cylindrical side and all matches and seal with valve body 1.In longitudinal hole in the middle of valve core frame 10, spool 9 moving up and down is installed, spool 9 lower ends extend downward outside valve core frame 10, and spool 9 bottoms are threaded sealing seat 7 are installed, on the middle part wall body of valve core frame 10, offer two symmetrically arranged grooves 34, and groove 34 is connected with the inlet passage 31 of valve body 1 and the outlet of the bottom of valve core frame 10 longitudinal holes.Pressure regulator comprises voltage regulation screw 28 and the main spring 27 being arranged in valve gap 29.The top of valve gap 29 30 is sealed by blocking a shot.Between valve gap 29 outer walls and valve body 1 inwall, be threaded connection, and valve core frame 10 tops are pressed in valve gap 29 bottoms.Main spring 27 holdings are between voltage regulation screw 28 and spool 9 tops.Spool 9 is also the many boss structures of a cylinder, and spool 9 tops are dish type cylinder boss structure, and this dish type cylinder boss matches with the interior step on valve core frame 10 tops, and O shape circle 24 is equipped with in centre, seals.There are interior cylinder table rank the dish type cylinder boss upper-end surface on spool 9 tops, it above step, is a small column boss 35, the lower end of main spring 27 is just contained between interior cylinder table rank and small column boss 35, also there is a boss dish type cylinder boss lower end surface on spool 9 tops, boss matches with the longitudinal hole of valve core frame 10, y-type seal ring 26 is housed below boss, seals.Circlip 22 is housed below y-type seal ring 26, prevents that y-type seal ring 26 from coming off.In the upper-end surface of sealing seat 7, be equipped with rectangular seal 8, rectangular seal 8 flushes with the upper-end surface of sealing seat 7.Rectangular seal 8 exports with the lower end of valve core frame 10 longitudinal holes, and end face forms sealing throttling action.
The interior cooperation of outlet passage 31 of valve body 1 is provided with check valve assembly.Shown in Fig. 4, Fig. 5, Fig. 6, check valve assembly comprises check valve body 12, safety check flap 16, compression spring 13, pad 15, back-up ring 14.Check valve body 12 is the cylindrical structural that axis horizontal arranges, its outer wall and outlet passage 31 inwalls are closely fixedly installed, the centre of check valve body 12 is provided with through hole 121, through hole 121 right parts are internal conical surface, check valve body is provided with stiffening rib 122 in the middle of 12 left sides, in the middle of stiffening rib 122 left ends, convexes with cylindrical tube 123.Safety check flap 16 comprises the lid 161 that is coated with rubber on outer wall and is sealed and matched mutually with the internal conical surface of through hole 121 right parts, the left side of lid 161 is provided with the cylinder boss 162 through cylindrical tube 123, back-up ring 14, pad 15, compression spring 13 are arranged on cylinder boss 162 successively from left to right, and compression spring 13 is between pad 15 right sides and cylindrical tube 123 left sides.After compression spring 13 is compressed, the certain force of generation makes safety check flap 16 and check valve body 12 at certain pressure lower seal.In order further to strengthen the fixing and sealability of check valve body 12, on the outer wall of check valve body 12, offer groove 36, in groove 36, be equipped with O shape circle 11.Check valve body 12 front-end faces are against on the step surface of outlet passage 31 inwalls, and check valve body 12 ear end faces are against on the step surface of outlet passage 31 inwalls by back-up ring 17.
Shown in Fig. 7, holding cavity 33 bottoms of valve body 1 are sealed by end cap 3, and are threaded connection between end cap 3 and valve body 1.End cap 3 is provided with tapped through hole, and what coordinate with this tapped through hole is plug 5, and the lower end of plug 5 is cylinder boss, and the end face of cylinder boss has the hexagonal hole of indent, for tightening of spanner.Between end cap 3 and valve body 1, coordinate O shape circle 2 is installed, between end cap 3 and plug 5, coordinate O shape is installed encloses 4, seal.
Holding cavity 33 madial walls of valve body 1 week filter screen 6 is upwards installed.The upper end of filter screen 6 coordinates location with the conical surface boss of valve body 1, and the lower end cylindrical of filter screen 6 coordinates location with the interior cylinder table terrace on end cap 3 tops.
On valve body 1, and the side top that is positioned at outlet passage 31 offers transmission channel 19, and transmission channel 19 is communicated with the dish type cylinder boss bottom on spool 9 tops with outlet passage 31.On valve body 1, also offer one end and be communicated with transmission channel 19, the other end and the extraneous through hole being communicated with of valve body 1, be equipped with plug 20 on this through hole, between plug 20 and valve body 1, be provided with seal ring.
Shown in Fig. 8, working principle of the present utility model is as follows:
When medium enters this product from inlet passage 32, medium successively from the groove 34 of the both sides, middle part of valve core frame 10, the gap between longitudinal hole, valve core frame 10 longitudinal hole bottoms and the sealing seat 7 in the middle of valve core frame 10 pass through.Due to the throttling action in gap, produce pressure drop and make the pressure decreased after valve, through post-decompression medium, pass through filter screen 6, the check valve assembly after flow valves.Under pressure medium effect, act on making every effort to overcome on safety check flap 16 and take compression spring 13 and act on the power on safety check flap 16, safety check flap 16 is opened, MEDIA FLOW brings out mouth to the right.When downstream water pressure increases and reaches setting value, by transmission channel 19, medium masterpiece is used in below spool 9, active force overcomes the downward active force of main spring 27, spool 9 is moved upward, reduce valve opening, flow velocity increases, pressure drop increases, the downstream pressure of valve reduces, if outlet pressure declines, medium is by transmission channel 19, medium masterpiece is used in below spool 9, active force is less than the downward active force of main spring 27, spool 9 is moved downward, valve opening increases, flow velocity reduces, pressure drop reduces, downstream pressure increases, thereby make valve body 1 outlet pressure keep constant.When pipeline upstream, medium does not have pressure, for preventing that the medium after valve from flowing backwards, under the effect of the medium after valve of the check valve assembly in reduction valve, closes, and prevents the pollution of downstream media to upstream line.When product was used after a period of time, accumulation of impurities, at filter screen 6 and valve body 1, between end cap 3, by turning on plug 5, utilizes the active force of medium that impurity is gone out, and also can turn on end cap 3, and the filter screen 6 of dismantling cleans.
A kind of reduction valve with filtration, anti-back flow function of the utility model, simple in structure, volume is little, long service life.
Above-described embodiment is only for the inventive concept of the present utility model of explaining, but not restriction to the utility model rights protection, allly utilizes this design to carry out the change of unsubstantiality to the utility model, all should fall into protection domain of the present utility model.
Claims (8)
1. one kind has filtration, the reduction valve of anti-back flow function, comprise the valve body with outlet passage and inlet passage, mangetic core assembly is installed in valve body, the top of mangetic core assembly is provided with pressure regulator, it is characterized in that: described mangetic core assembly comprises the valve core frame being fixedly mounted in valve body, valve core frame lower end is positioned at the holding cavity of valve body, in longitudinal hole in the middle of valve core frame, spool moving up and down is installed, spool lower end extends downward outside valve core frame, and spool bottom is provided with sealing seat, on the middle part wall body of valve core frame, offer two symmetrically arranged grooves, and groove is connected with the inlet passage of valve body and the outlet of the bottom of valve core frame longitudinal hole, the week of the holding cavity madial wall of valve body is upwards provided with filter screen, in the outlet passage of valve body, coordinate check valve assembly is installed.
2. a kind of reduction valve with filtration, anti-back flow function as claimed in claim 1, is characterized in that: described check valve assembly comprises check valve body, safety check flap, compression spring, pad, back-up ring; Check valve body is the cylindrical structural that axis horizontal arranges, its outer wall and outlet passage inwall are closely fixedly installed, and the centre of check valve body is provided with through hole, and through hole right part is internal conical surface, in the middle of check valve body left side, be provided with stiffening rib, in the middle of stiffening rib left end, convex with cylindrical tube; Safety check flap comprises the lid that is coated with rubber on outer wall and is sealed and matched mutually with the internal conical surface of through hole right part, the left side of lid is provided with the cylinder boss through cylindrical tube, back-up ring, pad, compression spring are arranged on cylinder boss successively from left to right, and compression spring is between pad right side and cylindrical tube left side.
3. a kind of reduction valve with filtration, anti-back flow function as claimed in claim 2, is characterized in that: on the outer wall of described check valve body, offer groove, be equipped with O shape circle in groove.
4. a kind of reduction valve with filtration, anti-back flow function as claimed in claim 1, is characterized in that: in the upper-end surface of described sealing seat, be equipped with rectangular seal, rectangular seal flushes with the upper-end surface of sealing seat.
5. a kind of reduction valve with filtration, anti-back flow function as described in claim 1 or 4, is characterized in that: between described sealing seat and spool, be threaded connection.
6. a kind of reduction valve with filtration, anti-back flow function as claimed in claim 1, is characterized in that: the holding cavity bottom of described valve body is sealed by end cap, and is threaded connection between end cap and valve body.
7. a kind of reduction valve with filtration, anti-back flow function as claimed in claim 6, is characterized in that: described end cap is provided with tapped through hole, and what coordinate with this tapped through hole is plug.
8. a kind of reduction valve with filtration, anti-back flow function as claimed in claim 1, is characterized in that: described pressure regulator comprises voltage regulation screw and the main spring being arranged in valve gap; Between valve gap outer wall and valve interior wall, be threaded connection, and valve gap presses valve core frame top; Main spring holding is between voltage regulation screw and spool top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320630093.7U CN203500599U (en) | 2013-10-12 | 2013-10-12 | Pressure reducing valve with filtering and backflow-prevention functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320630093.7U CN203500599U (en) | 2013-10-12 | 2013-10-12 | Pressure reducing valve with filtering and backflow-prevention functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203500599U true CN203500599U (en) | 2014-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320630093.7U Expired - Fee Related CN203500599U (en) | 2013-10-12 | 2013-10-12 | Pressure reducing valve with filtering and backflow-prevention functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203500599U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542148A (en) * | 2013-10-12 | 2014-01-29 | 浙江盾安阀门有限公司 | Reducing valve with filtering and backflow preventing functions |
| CN106352128A (en) * | 2016-10-25 | 2017-01-25 | 浙江盾安智控科技股份有限公司 | Automatic valve core component and differential pressure-independent type flow control valve |
| CN109212998A (en) * | 2017-06-29 | 2019-01-15 | 苏州热工研究院有限公司 | A kind of nuclear power plant's check-valves different flow operating condition flow resistance coefficient analogy method and system |
| CN110425318A (en) * | 2019-08-28 | 2019-11-08 | 浙江工业大学 | A kind of Pressure reducing valve for hot water |
-
2013
- 2013-10-12 CN CN201320630093.7U patent/CN203500599U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542148A (en) * | 2013-10-12 | 2014-01-29 | 浙江盾安阀门有限公司 | Reducing valve with filtering and backflow preventing functions |
| CN103542148B (en) * | 2013-10-12 | 2015-12-02 | 浙江盾安阀门有限公司 | A kind of reduction valve with filtration, anti-back flow function |
| CN106352128A (en) * | 2016-10-25 | 2017-01-25 | 浙江盾安智控科技股份有限公司 | Automatic valve core component and differential pressure-independent type flow control valve |
| CN109212998A (en) * | 2017-06-29 | 2019-01-15 | 苏州热工研究院有限公司 | A kind of nuclear power plant's check-valves different flow operating condition flow resistance coefficient analogy method and system |
| CN109212998B (en) * | 2017-06-29 | 2021-06-04 | 苏州热工研究院有限公司 | Flow resistance coefficient simulation method and system for check valve of nuclear power plant under different flow working conditions |
| CN110425318A (en) * | 2019-08-28 | 2019-11-08 | 浙江工业大学 | A kind of Pressure reducing valve for hot water |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 311800 Zhejiang city in Shaoxing Province town of Zhuji city shop industrial zone Zhejiang Dunan Valve Co. Ltd. Patentee after: ZHEJIANG DUNAN INTELLIGENT CONTROL TECHNOLOGY CO., LTD. Address before: 311800 Zhejiang city in Shaoxing Province town of Zhuji city shop industrial zone Zhejiang Dunan Valve Co. Ltd. Patentee before: Zhejiang Dun'an Valve Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20161012 |