CN204226778U - Multifunction internal formula constant pressure air feeding valve - Google Patents
Multifunction internal formula constant pressure air feeding valve Download PDFInfo
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- CN204226778U CN204226778U CN201420543874.7U CN201420543874U CN204226778U CN 204226778 U CN204226778 U CN 204226778U CN 201420543874 U CN201420543874 U CN 201420543874U CN 204226778 U CN204226778 U CN 204226778U
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Abstract
Multifunction internal formula constant pressure air feeding valve, the utility model provides a kind of built-in constant pressure air feeding valve, comprise constant voltage air chamber, described constant voltage air chamber is arranged on inside high-pressure air source, built-in constant pressure air feeding valve is provided with screw thread and is connected with high-pressure air source, by constant voltage air chamber sealing in high-pressure air source, the part exposing to high-pressure air source at built-in constant pressure air feeding valve is connected with the pressure gauge showing pressure, and pressure gauge display high nip pressures is or/and areas of permanent pressure pressure.This built-in constant pressure air feeding valve arrangement is reasonable, compact, safe and reliable.
Description
Technical field
The utility model relates to constant voltage device, particularly Multifunction internal formula constant pressure air feeding valve.
Background technique
Gas constant pressure valve is the pneumatic equipment for constant output certain pressure gas, gas constant pressure valve combines with high-pressure air source and forms constant pressure air feeding device, be usually used in the occasion that needs export gas for a long time consistently, as Breathing device for, cultivation oxygenation, gas welding, medical oxygen supply etc., its principle connects high-pressure air source, and by the constant voltage effect of constant pressure valve, the gas making pressurized gas be converted to lower pressure consistently exports, outlet pressure and stability of flow, with the requirement of satisfied use.Present gas constant pressure valve is generally the outside being separately mounted at high-pressure air source, the constant voltage room comprised in constant pressure valve is also the outside being positioned at high-pressure air source, this gas constant pressure valve relatively simple for structure, also more convenient with the connection of high-pressure air source, but because constant pressure valve itself has larger volume, especially the constant voltage air chamber of constant pressure valve is stable in order to ensure that constant voltage exports, the constant voltage space that general needs are larger, so the constant pressure valve be connected to outside high-pressure air source makes whole constant pressure air feeding device volume large, structure is compact not, be not suitable for the less occasion in space to use, and the constant pressure valve of peripheral hardware is easily by external force damaged in collision, use safe and reliable not.
Model utility content
The purpose of this utility model is that the shortcoming overcoming prior art is with not enough, provides a kind of rational in infrastructure, compact, safe and reliable built-in constant pressure air feeding valve.
The purpose of this utility model is achieved through the following technical solutions: a kind of built-in constant pressure air feeding valve, comprise constant voltage air chamber, it is characterized in that: described constant voltage air chamber is arranged on inside high-pressure air source, built-in constant pressure air feeding valve is provided with screw thread and is connected with high-pressure air source, by constant voltage air chamber sealing in high-pressure air source, the part exposing to high-pressure air source at built-in constant pressure air feeding valve is connected with the pressure gauge showing pressure, and pressure gauge can show high nip pressures or/and areas of permanent pressure pressure.
Described built-in constant pressure air feeding valve comprises valve body, and described valve body one end connects air outlet adapter, and the other end is provided with screw thread and is connected with high-pressure air source, and connect constant voltage air chamber in one end of screw thread, constant voltage air chamber is positioned at the inner side of high-pressure air source; The side of valve body is provided with pressure gauge, and described pressure gauge is communicated with zone of high pressure or/and areas of permanent pressure.
The structure that described pressure gauge is communicated with zone of high pressure is, micro through hole is provided with in the wall of valve body, one end connecting valve body side surface of described micro through hole is used for the manometric screw that is threaded, the other end is connected with the perforate stretched in high-pressure air source, pressure gauge can be realized like this and be communicated with high-pressure air source by micro through hole, thus the effect of display high nip pressures.
The structure that described pressure gauge is communicated with areas of permanent pressure is, directly in valve body side for arranging the through hole in the middle of microporous connectivity valve body inside the manometric screw that is threaded, through hole in the middle of described valve body is directly communicated with areas of permanent pressure, and described through hole is also communicated with air outlet adapter simultaneously.Pressure gauge can be realized like this by microporous connectivity areas of permanent pressure, thus the effect of display areas of permanent pressure pressure.
Valve body also can be provided with charging air inlet, described charging air inlet is also connected with high-pressure air source, concrete structure is, micro through hole is provided with in the wall of valve body, one end connecting valve body side surface of described micro through hole is for the screw of the charging air inlet that is threaded, the other end is connected with the perforate stretched in high-pressure air source, can realize charging air inlet like this and be communicated with high-pressure air source by micro through hole, thus realizes the effect to zone of high pressure plenum.
Described charging air inlet can be integral type or split-type structural.
The charging air inlet of described split-type structural comprises one-way valve and quick-acting joint two-part of separation, and two-part are all connected with the same screw on valve body by screw thread, and quick-acting joint is socketed in outside one-way valve, arranges Packed O shape circle between quick-acting joint and one-way valve; Described one-way valve comprises valve seat, valve seat center is provided with stepped throughhole, stepped shaft jacking block is provided with in stepped throughhole, stepped shaft jacking block and stepped throughhole match, stepped shaft jacking block is socketed Packed O shape circle, and described O shape circle seals the gap between stepped shaft jacking block and stepped throughhole.The action principle of this split-type structural charging air inlet is: when needs are inflated, quick-acting joint to be screwed on valve body, now be connected by seal with O ring between quick-acting joint with one-way valve, when inflating, gas enters from charging air inlet, promote stepped shaft jacking block to retreat, and there is gap between stepped throughhole, gas can be filled with zone of high pressure from gap, at the end of waiting to inflate, the air pressure of zone of high pressure promotes stepped shaft jacking block and resets, head in stepped throughhole, O shape circle between simultaneously seals gap between the two, gas can not oppositely be sprayed, produce the effect of pressurize.At this moment quick-acting joint can be back-outed, make the component that valve body surface is not protruded, reduce volume further easy to use, also can avoid foreign object colliding with to the charging air inlet protruded, use safer.
The end that described valve body stretches into high-pressure air source is provided with two O circle, and end is connected with constant voltage air chamber by two O circle, and described constant voltage air chamber can be Circular Pipe, and described Circular Pipe is socketed in the end of valve body, is sealed, separate zone of high pressure and areas of permanent pressure by two O circle; Being provided with between two O circle and being communicated with atmospheric through hole, is also specifically be provided with micro through hole in the wall by valve body to be communicated with barometric pressure.
The other end of constant voltage air chamber is provided with constant voltage assembly, described constant voltage assembly comprises piston, disc spring sheet, POM (polyoxygenated polyoxymethylene, also known as match steel) block, adjusting nut, described disc spring sheet grouping is socketed on the piston rod of piston, one end of piston is towards constant voltage air chamber, the other end is provided with POM block, the end of described constant voltage air chamber is provided with piston chamber, piston chamber center has been threaded adjusting nut, adjusting nut center is provided with micro through hole, the inner end of described adjusting nut can fit and be connected discretely with POM block, to close and open micro through hole, realize constant pressure adjust.The working principle of described constant voltage assembly is: when pressure lower than zone of high pressure of the pressure of constant voltage air chamber, high pressure air enters from the micro through hole of adjusting nut, be filled with constant voltage air chamber by the micro through hole in piston simultaneously, after the air pressure rising of constant voltage air chamber, promote the resistance of piston overpowers disc spring sheet to adjusting nut one lateral movement, until the end of POM block contact adjusting nut, close the micro through hole in adjusting nut, now pressurized gas can not enter again, the gas pressure power of constant voltage air chamber adds that the spring force of disc spring sheet equals the active force of zone of high pressure air pressure, now the pressure of constant voltage air chamber can be constant in a lower value, when the pressure of constant voltage air chamber reduces, pressurized gas push POM block and piston again open, replenish pressurized gas, POM block and piston are again to adjusting nut one lateral movement, until the end of POM block contact adjusting nut, close the micro through hole in adjusting nut, repeated action like this, can ensure that constant voltage air chamber in use keeps the air pressure of constant voltage always.Make the change in depth that is screwed into of adjusting nut can the size of step-less adjustment areas of permanent pressure air pressure.
Described air outlet adapter can adopt different structural type according to the difference of use occasion, and can realize cultivating oxygenation as connected gas stone, connect reduction valve and can realize Breathing device for or medical oxygen supply, connected adjustable snifting valve can realize gas welding; Function is very various, and Application comparison is extensive.
Described high-pressure air source can be the high-pressure bottle such as gas cylinder, high pressure gas holder.
The utility model has following advantage and effect relative to prior art: the constant voltage air chamber of (1) this built-in constant pressure air feeding valve is arranged on inside high-pressure air source, make the structure of whole constant pressure air feeding device closely, rationally, volume obviously reduces, effectively can save usage space, be specially adapted to the occasion that usage space is less.(2) do not expose because constant voltage air chamber is built-in, so external force also can be avoided better to stagger along, situation that constant voltage room makes it damage occurs, and uses more safe and reliable.(3) pressure gauge of display zone of high pressure, areas of permanent pressure pressure can be according to circumstances set on the valve body of constant pressure air feeding valve, can monitor very intuitively zone of high pressure with and the pressure changing of constant pressure, very easy to use.(4) on valve body, also can be provided with the split type charging air inlet to zone of high pressure inflation, to protrude from the quick-acting joint part of valve body removable for charging air inlet after inflation, charging air inlet do not protruded from valve body, can effectively avoid colliding with of foreign object, use safer.(5) the constant voltage assembly set by can according to the size of the requirement free adjusting areas of permanent pressure pressure used, and can realize the step-less adjustment of air pressure, validity is very high.
Accompanying drawing explanation
Fig. 1 is the External view (not showing high-pressure air source) of this built-in constant pressure air feeding valve.
Fig. 2 is the exploded view of built-in constant pressure air feeding valve shown in Fig. 1.
Fig. 3 is the structural representation of the valve body part of built-in constant pressure air feeding valve shown in Fig. 2.
Fig. 4 is the structural representation that the part of valve body shown in Fig. 3 rotates 180 °.
Fig. 5 is the sectional view of valve body shown in Fig. 3.
Fig. 6 is the sectional view of the half-twist of valve body shown in Fig. 3.
Fig. 7 is the sectional view of the constant voltage assembly of built-in constant pressure air feeding valve shown in Fig. 1.
The title that wherein each label is corresponding is as follows: 1-constant voltage air chamber; 2-screw thread; 3,4-pressure gauge; 5-valve body; 6-air outlet adapter; 7,14,27,35,36-micro through hole; 8,10,15-screw; 9,16,37-perforate; 11-micropore; 12,26-through hole; 13-charging air inlet; 17-one-way valve; 18-quick-acting joint; 19,23,24,25,33-O shape circle; 20-valve seat; 21-stepped throughhole; 22-stepped shaft jacking block; 28-piston; 29-disc spring sheet; 30-POM block; 31-adjusting nut; 32-piston chamber; 34-plastic spacer
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but mode of execution of the present utility model is not limited thereto.
Embodiment
Fig. 1 ~ Fig. 7 shows a kind of concrete structure of the present utility model, from Fig. 1 and Fig. 2, this built-in constant pressure air feeding valve, comprise constant voltage air chamber 1, described constant voltage air chamber 1 is arranged on inside high-pressure air source (not shown), built-in constant pressure air feeding valve is provided with screw thread 2 and is connected with high-pressure air source, constant voltage air chamber 1 is sealed in high-pressure air source, the part exposing to high-pressure air source at built-in constant pressure air feeding valve is connected with the pressure gauge 3,4 showing pressure, wherein pressure gauge 3 can show areas of permanent pressure pressure, and pressure gauge 4 can show high nip pressures.As seen from Figure 2, described built-in constant pressure air feeding valve comprises valve body 5, and described valve body 5 one end connects air outlet adapter 6, and the other end is provided with screw thread 2 and is connected with high-pressure air source, and connect constant voltage air chamber 1 in one end of screw thread 2, constant voltage air chamber 1 is positioned at the inner side of high-pressure air source.
The structure that described pressure gauge 4 is communicated with zone of high pressure is, micro through hole 7 (see Fig. 6) is provided with in the wall of valve body 5, one end of described micro through hole 7 is communicated with the screw 8 of valve body 5 side for the pressure gauge 4 that is threaded, the other end is connected with the perforate 9 stretched in high-pressure air source, pressure gauge 4 can be realized like this and be communicated with high-pressure air source by micro through hole 7, thus the effect of display high nip pressures, pressure gauge 4 is communicated with the gas circuit of zone of high pressure as shown in dotted line D in Fig. 6.
The structure that described pressure gauge 3 is communicated with areas of permanent pressure is, micropore 11 is directly set inside the screw 10 of valve body 5 side for the pressure gauge 3 that is threaded and is communicated with through hole 12 (see Fig. 6) in the middle of valve body 5, through hole 12 in the middle of described valve body 5 is directly communicated with areas of permanent pressure, and described through hole 12 is also communicated with air outlet adapter 6 (not shown in Fig. 6) simultaneously.Pressure gauge 3 can be realized like this and be communicated with areas of permanent pressure by micropore 11, thus the effect of display areas of permanent pressure pressure, pressure gauge 3 is communicated with the gas circuit of areas of permanent pressure as shown in dotted line C in Fig. 6.
Valve body 5 also can be provided with charging air inlet 13, described charging air inlet 13 is also connected with high-pressure air source, see Fig. 3, Fig. 5, concrete structure is, micro through hole 14 is provided with in the wall of valve body 5, one end of described micro through hole 14 is communicated with the screw 15 of valve body 5 side for the charging air inlet 13 that is threaded, the other end is connected with the perforate 16 stretched in high-pressure air source, charging air inlet 13 can be realized like this and be communicated with high-pressure air source by micro through hole 14, thus the effect realized zone of high pressure plenum, concrete gas circuit is as shown in dotted line A in Fig. 6.Described charging air inlet can be integral type or split-type structural; The charging air inlet 13 of described split-type structural comprises one-way valve 17 and quick-acting joint 18 two-part (see Fig. 3, Fig. 5) of separation, two-part are all connected with the same screw 15 on valve body 5 by screw thread, quick-acting joint 18 is socketed in outside one-way valve 17, arranges Packed O shape and enclose 19 between quick-acting joint 18 and one-way valve 17; Described one-way valve 17 comprises valve seat 20, valve seat 20 center is provided with stepped throughhole 21, stepped shaft jacking block 22 is provided with in stepped throughhole 21, stepped shaft jacking block 22 and stepped throughhole 21 match, stepped shaft jacking block 22 is socketed Packed O shape circle 23, and the gap that described O shape is enclosed between 23 pairs of stepped shaft jacking blocks 22 and stepped throughhole 21 seals.The action principle of this split-type structural charging air inlet is: when needs are inflated, quick-acting joint 18 to be screwed on valve body 5, now enclose 19 by O shape between quick-acting joint 18 and one-way valve 17 to be tightly connected, when inflating, gas enters from charging air inlet 13, promote stepped shaft jacking block 22 to retreat, and there is gap between stepped throughhole 21, gas can be filled with zone of high pressure from gap, at the end of waiting to inflate, the air pressure of zone of high pressure promotes stepped shaft jacking block 22 and resets, head in stepped throughhole 21, O shape circle 19 between simultaneously seals gap between the two, gas can not oppositely be sprayed, produce the effect of pressurize.At this moment quick-acting joint 18 can be back-outed, make valve body 5 surface there is no the component protruded, reduce volume further easy to use, also can avoid foreign object colliding with to the charging air inlet protruded, use safer.
The end that described valve body 5 stretches into high-pressure air source is provided with two O and encloses 24,25 (see Fig. 2, Fig. 5), end is connected with constant voltage air chamber 1 by two O circle 24,25, described constant voltage air chamber 1 can be Circular Pipe, described Circular Pipe is socketed in the end of valve body 5, sealed by two O circle 24,25, separate zone of high pressure and areas of permanent pressure; Be provided with between two O circle 24,25 and be communicated with atmospheric through hole 26, be also specifically be provided with micro through hole 27 in the wall by valve body 5 to be communicated with barometric pressure, concrete gas circuit is as shown in dotted line B in Fig. 5.
Constant voltage assembly is provided with (see Fig. 2 at the other end of Circular Pipe, Fig. 7), described constant voltage assembly comprises piston 28, disc spring sheet 29, POM block 30, adjusting nut 31, piston chamber 32, described disc spring sheet 29 grouping is socketed on the piston rod of piston 28, one end of piston 28 is towards constant voltage air chamber 1, the other end is provided with POM block 30, the end of described Circular Pipe is provided with piston chamber 32, piston chamber 32 center has been threaded adjusting nut 31, adjusting nut 31 center is provided with micro through hole 35, the inner end of described adjusting nut 31 can fit and be connected discretely with POM block 30, to close and open micro through hole 35, realize constant pressure adjust.The working principle of described constant voltage assembly is: when pressure lower than zone of high pressure of the pressure of constant voltage air chamber 1, high pressure air E enters from the micro through hole 35 of adjusting nut 31, be filled with constant voltage air chamber 1 by the micro through hole 36 in piston 28 simultaneously, after the air pressure rising of constant voltage air chamber 1, promote piston 28 and overcome the resistance of disc spring sheet 29 to adjusting nut 31 1 lateral movement, until POM block 30 contacts the end of adjusting nut 31, close the micro through hole 35 in adjusting nut 31, now pressurized gas can not enter again, the gas pressure power of constant voltage air chamber 1 adds that the spring force of disc spring sheet 29 equals the active force of zone of high pressure air pressure, now the pressure of constant voltage air chamber 1 can be constant in a lower value, when the pressure of constant voltage air chamber 1 reduces, pressurized gas push POM block 30 and piston 28 again open, replenish pressurized gas, POM block 30 and piston 28 are again to adjusting nut 31 1 lateral movement, until POM block 30 contacts the end of adjusting nut 31, close the micro through hole 35 in adjusting nut 31, repeated action like this, can ensure that constant voltage air chamber 1 in use keeps the air pressure of constant voltage always.Make the change in depth that is screwed into of adjusting nut 31 can the size of step-less adjustment areas of permanent pressure air pressure.
Described air outlet adapter 6 can adopt different structural type according to the difference of use occasion, and can realize cultivating oxygenation as connected gas stone, connect reduction valve and can realize Breathing device for or medical oxygen supply, connected adjustable snifting valve can realize gas welding; Function is very various, and Application comparison is extensive.
Described high-pressure air source can be the high-pressure bottle such as gas cylinder, high pressure gas holder.
Above-described embodiment is the utility model preferably mode of execution; but mode of execution of the present utility model is not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present utility model and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection domain of the present utility model.
Claims (10)
1. a built-in constant pressure air feeding valve, comprise constant voltage air chamber, it is characterized in that: described constant voltage air chamber is arranged on inside high-pressure air source, built-in constant pressure air feeding valve is provided with screw thread and is connected with high-pressure air source, by constant voltage air chamber sealing in high-pressure air source, the part exposing to high-pressure air source at built-in constant pressure air feeding valve is connected with the pressure gauge showing pressure, and pressure gauge display high nip pressures is or/and areas of permanent pressure pressure.
2. built-in constant pressure air feeding valve according to claim 1, it is characterized in that: described built-in constant pressure air feeding valve comprises valve body, described valve body one end connects air outlet adapter, the other end is provided with screw thread and is connected with high-pressure air source, connect constant voltage air chamber in one end of screw thread, constant voltage air chamber is positioned at the inner side of high-pressure air source; The side of valve body is provided with pressure gauge, and described pressure gauge is communicated with zone of high pressure or/and areas of permanent pressure.
3. built-in constant pressure air feeding valve according to claim 2, it is characterized in that: the structure that described pressure gauge is communicated with zone of high pressure is, micro through hole is provided with in the wall of valve body, one end connecting valve body side surface of described micro through hole is used for the manometric screw that is threaded, and the other end is connected with the perforate stretched in high-pressure air source.
4. built-in constant pressure air feeding valve according to claim 2, it is characterized in that: the structure that described pressure gauge is communicated with areas of permanent pressure is, directly in valve body side for arranging the through hole in the middle of microporous connectivity valve body inside the manometric screw that is threaded, through hole in the middle of described valve body is directly communicated with areas of permanent pressure, and described through hole is also communicated with air outlet adapter simultaneously.
5. built-in constant pressure air feeding valve according to claim 1, it is characterized in that: on valve body, be provided with charging air inlet, micro through hole is provided with in the wall of valve body, one end connecting valve body side surface of described micro through hole is for the screw of the charging air inlet that is threaded, and the other end is connected with the perforate stretched in high-pressure air source.
6. built-in constant pressure air feeding valve according to claim 5, is characterized in that: described charging air inlet is integral type or split-type structural.
7. built-in constant pressure air feeding valve according to claim 6, it is characterized in that: the charging air inlet of described split-type structural comprises one-way valve and quick-acting joint two-part of separation, two-part are all connected with the same screw on valve body by screw thread, quick-acting joint is socketed in outside one-way valve, arranges Packed O shape circle between quick-acting joint and one-way valve; Described one-way valve comprises valve seat, valve seat center is provided with stepped throughhole, stepped shaft jacking block is provided with in stepped throughhole, stepped shaft jacking block and stepped throughhole match, stepped shaft jacking block is socketed Packed O shape circle, and described O shape circle seals the gap between stepped shaft jacking block and stepped throughhole.
8. built-in constant pressure air feeding valve according to claim 2, it is characterized in that: the end that described valve body stretches into high-pressure air source is provided with two O circle, end is connected with constant voltage air chamber by two O circle, described constant voltage air chamber is Circular Pipe, described Circular Pipe is socketed in the end of valve body, sealed by two O circle, separate zone of high pressure and areas of permanent pressure; Be provided with between two O circle and be communicated with atmospheric through hole.
9. the built-in constant pressure air feeding valve according to any one of claim 1 ~ 8, it is characterized in that: the other end of constant voltage air chamber is provided with constant voltage assembly, described constant voltage assembly comprises piston, disc spring sheet, POM block, adjusting nut, described disc spring sheet grouping is socketed on the piston rod of piston, one end of piston is towards constant voltage air chamber, the other end is provided with POM block, the end of described constant voltage air chamber is provided with piston chamber, piston chamber center has been threaded adjusting nut, adjusting nut center is provided with micro through hole, and the inner end of described adjusting nut is connected with POM block.
10. the built-in constant pressure air feeding valve according to any one of claim 2 ~ 8, is characterized in that: described air outlet adapter connects gas stone, reduction valve or adjustable snifting valve; Described high-pressure air source is gas cylinder or high pressure gas holder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420543874.7U CN204226778U (en) | 2014-09-19 | 2014-09-19 | Multifunction internal formula constant pressure air feeding valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420543874.7U CN204226778U (en) | 2014-09-19 | 2014-09-19 | Multifunction internal formula constant pressure air feeding valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204226778U true CN204226778U (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420543874.7U Expired - Fee Related CN204226778U (en) | 2014-09-19 | 2014-09-19 | Multifunction internal formula constant pressure air feeding valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN204226778U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115451156A (en) * | 2022-09-27 | 2022-12-09 | 江西德思宏液压有限公司 | Reversing valve, supercharger and hydraulic pump |
-
2014
- 2014-09-19 CN CN201420543874.7U patent/CN204226778U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115451156A (en) * | 2022-09-27 | 2022-12-09 | 江西德思宏液压有限公司 | Reversing valve, supercharger and hydraulic pump |
| CN115451156B (en) * | 2022-09-27 | 2024-06-07 | 江西德思宏液压有限公司 | Reversing valve, supercharger and hydraulic pump |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150325 Termination date: 20150919 |
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| EXPY | Termination of patent right or utility model |