CN113006839B - Large-flow safety valve - Google Patents
Large-flow safety valve Download PDFInfo
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- CN113006839B CN113006839B CN202110345928.3A CN202110345928A CN113006839B CN 113006839 B CN113006839 B CN 113006839B CN 202110345928 A CN202110345928 A CN 202110345928A CN 113006839 B CN113006839 B CN 113006839B
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- joint
- pressure regulating
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- 239000007788 liquid Substances 0.000 claims abstract description 70
- 230000001105 regulatory effect Effects 0.000 claims abstract description 43
- 230000003139 buffering effect Effects 0.000 claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 230000009471 action Effects 0.000 claims abstract description 18
- 238000013016 damping Methods 0.000 claims abstract description 8
- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 3
- 229920002530 polyetherether ketone Polymers 0.000 claims description 3
- 239000002861 polymer material Substances 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims description 2
- 230000004044 response Effects 0.000 abstract description 5
- 239000003245 coal Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 230000001502 supplementing effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
- E21D15/512—Arrangement of valves
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a large-flow safety valve which comprises a main valve body, a sleeve, a joint, a valve core, a spring seat and a pressure regulating cylinder, wherein a valve core inner cavity is formed in the valve core, at least one liquid discharge hole is formed in the main valve body, a liquid inlet hole is formed in the joint, the valve core acts to control the conduction between the liquid inlet hole and the liquid discharge hole, a buffering lengthening component is arranged in the joint and connected with the valve core to form linkage fit, when the safety valve is conducted by the action of the valve core, the buffering lengthening component acts to one side of the sleeve to form a section of displacement, one end of the valve core protrudes to form an extending column, a damping channel is formed in the extending column and is respectively communicated with the liquid inlet hole and the valve core inner cavity, the other end of the valve core is connected in a pressure regulating cavity, and the pressure regulating cavity is communicated with the valve core inner cavity. The safety valve has the advantages of stable work, quick response time and high sealing performance, can slow down the impact force of oil liquid under large flow to the safety valve, ensures the stability and reliability of the safety valve, and prolongs the service life of products.
Description
Technical Field
The invention relates to a safety valve, in particular to a high-flow safety valve.
Background
Along with the large-scale implementation and development of the fully-mechanized coal mining hydraulic support, the requirements of fully-mechanized coal mining work on the hydraulic support are stricter, so that the requirements on the performance of a safety valve used on a hydraulic cylinder of the hydraulic support are higher and higher, especially, the service life and the flow performance of the safety valve are further required, and the safety valve can be used only through a pressure test.
In order to meet the requirements of a fully mechanized coal mining hydraulic support of a coal mine, a safety valve needs to be lifted from the working flow (reaching the working flow of 5000L/min), and the most direct method for lifting the working flow of the safety valve is to enlarge the size of the original safety valve under the condition of unchanging structure, namely expand the drift diameter of an oil way, so that the aim of large flow can be achieved, but the size of the existing safety valve is already large, and the normal fully mechanized coal mining work of the coal mine can be influenced by directly increasing the size of the safety valve; if only the valve port drift diameter of the safety valve is changed, large-flow liquid can generate large impact force, the safety valve can bear external impact, the damage to an action part is easily caused, the service life of the safety valve is seriously influenced, and even relevant equipment is damaged, so that the safety valve cannot meet the requirement of a pressure test.
The high-flow safety valve needs to pass a pressure test and also needs to have reliable sealing performance, the sealing mode of the valve core of the conventional safety valve adopts a sealing ring to be annularly positioned on the inner wall of the valve body, the sealing when the valve core does not act is realized through the matching of the periphery of the side surface of the valve core and the sealing ring, after the service life is prolonged, the sealing ring can deform or misplace through friction for too many times, so that the sealing performance between the sealing ring and the valve core is reduced, the oil channel is slowly opened in the conduction process of the safety valve, the working flow cannot be quickly improved, and the response time of the safety valve is longer.
Disclosure of Invention
In view of this, the present invention provides a high-flow safety valve with stable operation, fast response time and high sealing performance, which can slow down the impact of the high-flow oil on the safety valve, ensure the stability and reliability of the safety valve, and prolong the service life of the product.
In order to achieve the purpose, the invention adopts the large-flow safety valve which comprises a main valve body, a sleeve connected to one end of the main valve body, a joint connected to the other end of the main valve body, a valve core movably connected in the sleeve and the main valve body, a spring sleeved on the valve core, a spring seat connected on the valve core, and a pressure regulating cylinder arranged in the sleeve and connected with the valve core, wherein one end of the spring is abutted against the spring seat, the other end of the spring is abutted against the pressure regulating cylinder, a valve core inner cavity is formed in the valve core, at least one liquid discharge hole is formed in the main valve body, a liquid inlet hole is formed in the joint, the valve core acts to control the conduction between the liquid inlet hole and the liquid discharge hole, a buffer lengthening component is arranged in the joint and is connected with the valve core to form linkage fit, when the safety valve is conducted by the action of the valve core, the buffer lengthening component acts to form a section of displacement to one side of the sleeve, one end of the valve core protrudes to form an extension column, a damping channel is formed in the extension column, the extension column is respectively communicated with the liquid inlet hole and the valve core inner cavity, a pressure regulating cylinder is formed on the pressure regulating cylinder, the pressure regulating cavity with the inner cavity of the valve core, and the pressure regulating cavity is communicated with the pressure regulating cylinder.
The safety valve for realizing large working flow comprises the following aspects:
1. setting a buffering and lengthening component: when no liquid enters the liquid inlet hole, the valve core is pressed against the buffering and length-supplementing assembly under the action of the spring, the buffering and length-supplementing assembly is compressed, and the liquid inlet hole and the liquid outlet hole are in a closed state; when liquid enters the liquid inlet hole, the liquid enters the valve core and enables the valve core to gradually move towards one side of the pressure regulating cylinder, the displacement of the section can be divided into two sections of strokes (the two sections of strokes take the contact of the valve core and the buffering and lengthening component as boundaries), the spring is gradually compressed, after the buffering and lengthening component loses the acting force of the valve core on the spring, the buffering and lengthening component moves towards one side of the sleeve under the internal acting force of the spring until the buffering and lengthening component is limited by the main valve body, the moving distance of the buffering and lengthening component is the length of the buffering gap (the section is a first section of conduction action stroke), the valve core continuously moves towards one side of the pressure regulating cylinder, the valve core and the buffering and lengthening component lose contact fit (the section is a second section of conduction action stroke), and at the moment, a passage is formed between the liquid inlet hole and the liquid outlet hole to enable the safety valve to be in a conduction state; when the liquid inlet hole stops liquid entering, the liquid inlet hole and the valve core move towards one side of the pressure regulating cylinder, the liquid inlet hole and the valve core can be divided into two sections of strokes in the resetting process (the two sections of strokes are bounded by the fact that the valve core is in contact with the buffering length supplementing assembly), the valve core moves towards one side of the joint under the action of the spring to reset (the section is a first section of closing action stroke), after the valve core is in contact with the buffering length supplementing assembly, the buffering length supplementing assembly is subjected to acting force applied to the valve core, and the buffering length supplementing assembly is gradually compressed until the initial state (the section is a second section of closing action stroke), and the balance state is achieved.
2. The principle of hydraulic balance is adopted: when oil enters from the liquid inlet hole, the oil acts on the side surface S1 of the valve core close to the joint, the valve core moves towards the sleeve direction by overcoming the elasticity of the spring, meanwhile, the oil enters the inner cavity of the valve core from the damping channel until the pressure regulating cavity is filled, and the oil of the pressure regulating cavity acts on the side surface S2 of the valve core close to the pressure regulating cylinder to slow down the acting force of the oil in the liquid inlet hole on the valve core, so that the valve core has a buffering effect when being opened. When the safety valve is in a conducting equilibrium state (a liquid inlet hole and a liquid outlet hole form a passage), the force applied to the valve core is F1= the force applied to the side surface S1 of the valve core by the oil liquid-the force applied to the side surface S2 of the valve core by the oil liquid-the friction force F3 between the valve core and a contact component (the friction force is negligible) can be obtained through stress analysis.
On the basis of not increasing the volume, the safety valve relieves the acting force of oil on the valve core when the valve core is opened and the impact force on the joint when the valve core is reset by arranging the buffering and lengthening component and applying a hydraulic balance principle, avoids the joint and related components from being crushed, ensures the stability and reliability of the safety valve in use, and can meet the pressure test requirement of 5000L/min of working flow.
The invention is further provided with a buffering and lengthening assembly which comprises a seat sleeve connected in the joint, an elastic piece arranged between the seat sleeve and the joint and a valve seat connected on the seat sleeve, wherein the valve core is abutted on the valve seat.
The invention is further arranged in that an annular cavity is formed between the outer wall of the seat sleeve and the inner wall of the joint, and the elastic element is arranged in the annular cavity.
The invention is further provided that the elastic element is a disc spring.
The buffering and lengthening assembly is composed of a seat sleeve, an elastic piece and a valve seat, is convenient to assemble with a joint, and has the advantages of being stable in connection and simple in matching.
The invention is further set that one end of the valve core close to the joint forms an outer annular inclined plane, the position of the valve seat opposite to the outer annular inclined plane forms an inner annular inclined plane matched with the outer annular inclined plane, the valve core is jointed with the valve seat through the outer annular inclined plane and the inner annular inclined plane to form fit, the inner wall of the main valve body forms an annular limiting part, the valve seat is arranged on one side of the limiting part, and the liquid discharge hole is arranged on the other side of the limiting part.
The inner annular inclined surface of the valve seat is attached to the outer annular inclined surface of the valve element to form a contact surface, and the contact surfaces of the inner annular inclined surface and the outer annular inclined surface are tightly attached by utilizing the opposite acting forces of the spring and the disc spring on the valve element respectively; after the valve core and the valve seat are not matched, oil can flow to the liquid discharge hole from the liquid inlet hole immediately, and the safety valve is high in response speed and rapid in working flow lifting when being conducted.
The invention is further arranged to form an extending part at the position of the seat sleeve opposite to the limiting part, the valve seat is fixed on the extending part, and when the valve core does not act, a buffer gap is formed between the extending part and the limiting part and between the extending part and the valve seat as well as between the valve seat and the limiting part.
The invention is further provided with two liquid discharge holes which are symmetrically arranged at two sides of the valve core, the extension column is positioned at the axis position of the valve core, and an arc-shaped concave surface is formed at the joint of the extension column and the valve core.
The extension post can also be used for shunting oil when the liquid inlet hole and the liquid discharge hole are opened except for communicating the liquid inlet hole and the valve core cavity, so that the oil in the liquid inlet hole is uniformly discharged to the liquid discharge holes on two sides, the oil is discharged, and the working flow is improved.
The invention is further provided with a first sealing structure arranged between the inner wall of the pressure regulating chamber and the outer wall of the valve core, a second sealing structure arranged between the inner wall of the main valve body and the outer wall of the valve core, and a third sealing structure arranged between the outer wall of the seat sleeve and the inner wall of the joint.
The invention is further provided that the first sealing structure, the second sealing structure and the third sealing structure respectively comprise an O-shaped sealing ring and a retainer ring.
The sealing structure can ensure the sealing reliability between the valve core and the pressure regulating cylinder, between the valve core and the main valve body, and between the joint and the seat sleeve.
The invention is further provided with a valve seat made of special polyetheretherketone high polymer material.
The valve seat made of the material has the advantages of high mechanical strength, high toughness, corrosion resistance and wear resistance, and the safety valve is ensured to have longer service life.
Drawings
FIG. 1 is a schematic cross-sectional view of an embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view of an intermediate state during injection according to an embodiment of the present invention.
FIG. 3 is a schematic cross-sectional view of the fully conducting state during liquid injection according to the embodiment of the present invention.
Fig. 4 is an enlarged view of a portion a in fig. 1.
Fig. 5 is an enlarged view of a portion B in fig. 3.
Detailed Description
As shown in fig. 1-5, the present invention is a large flow safety valve, including a main valve body 1, a sleeve 2 connected to one end of the main valve body 1, a joint 3 connected to the other end of the main valve body 1, a valve core 4 movably connected in the sleeve 2 and the main valve body 1, a spring 5 sleeved on the valve core 4, a spring seat 6 connected to the valve core 4, and a pressure regulating cylinder 7 arranged in the sleeve 2 and connected to the valve core 4, wherein one end of the spring 5 is abutted against the spring seat 6, the other end of the spring 5 is abutted against the pressure regulating cylinder 7, a valve core inner cavity 41 is formed in the valve core 4, two liquid discharge holes 11 are formed in the main valve body 1, the two liquid discharge holes 11 are symmetrically arranged at two sides of the valve core 4, a liquid inlet hole 31 is formed in the joint 3, the valve core 4 acts to control the conduction between the liquid inlet hole 31 and the liquid discharge hole 11, a buffer lengthening assembly is arranged in the joint 3, the buffer lengthening assembly comprises a seat sleeve 8 connected in the joint 3, an elastic element 9 arranged between the seat sleeve 8 and the joint 3 and a valve seat 10 connected on the seat sleeve 8, wherein the valve seat 10 is made of a polyether-ether-ketone special polymer material, a ring cavity 32 is formed between the outer wall of the seat sleeve 8 and the inner wall of the joint 3, the elastic element 9 is arranged in the ring cavity 32, the elastic element 9 is a disc spring, an outer ring inclined surface 43 is formed at one end, close to the joint 3, of the valve core 4, an inner ring inclined surface 101 matched with the outer ring inclined surface 43 is formed at the position, over against the outer ring inclined surface 43, of the valve seat 10, the valve core 4 is attached to the valve seat 10 through the outer ring inclined surface 43 and the inner ring inclined surface 101 to form a fit, an annular limiting part 12 is formed on the inner wall of the main valve body 1, the valve seat 10 is arranged on one side of the limiting part 12, and a liquid discharge hole 11 is arranged on the other side of the limiting part 12, the utility model discloses a safety valve, including seat cover 8, limiting part 12, valve core 4, buffering lengthening assembly, pressure regulating cylinder 7, pressure regulating chamber 71, valve core 4, pressure regulating chamber 71, first seal structure a, second seal structure b, the outer wall of seat cover 8 and the inner wall of joint 3 are provided with third seal structure c, second seal structure a, third seal structure O, third seal structure a, pressure regulating ring seal structure O and the like, seat cover 10 fixes extension 81, when valve core 4 does not move, extension 81 and valve core 10 all with limiting part 12 between have one section buffering clearance, when valve core 4 moves and makes the relief valve switch on, buffering lengthening assembly can move to sleeve 2 one side and form one section displacement, the protruding extension post 42 that forms of one end of valve core 4, extension post 42 is located the axle center of valve core 4, extension post 42 forms arc concave surface 43 with the junction of valve core 4, form damping passageway 421 in the extension post 42, damping passageway 421 communicates with feed liquor hole 31 and valve core inner chamber 41 respectively, pressure regulating cylinder 7 is last to form the pressure regulating chamber 71 that forms the inside diameter and the diameter adaptation of valve core 4, pressure regulating cylinder 7, pressure regulating chamber 71 and valve core inner chamber 71 communicate with valve core inner chamber 71, be provided with first seal structure a between the outer wall of pressure regulating chamber 71 between the inner wall of pressure regulating chamber 71, main valve body 1 and the outer wall of valve core 4 are provided with third seal structure b between be provided with third seal structure a, third seal structure b and third seal structure a seal structure b are provided with the sealing washer all included.
According to the above embodiment, the safety valve of the present invention for achieving a large working flow rate includes the following aspects:
1. setting a buffering and lengthening component: when no liquid enters the liquid inlet hole, the valve core is abutted against the valve seat under the action of the spring, the acting force of a joint is applied to the seat sleeve, the disc spring is compressed at the moment, the valve core is tightly matched with the valve seat through the joint of the outer annular inclined surface and the inner annular inclined surface, and the liquid inlet hole and the liquid outlet hole are in a closed state; when liquid enters the liquid inlet hole, the liquid enters the valve core and enables the valve core to gradually move towards one side of the pressure regulating cylinder, the displacement of the section can be divided into two sections of strokes (the two sections of strokes are bounded by the contact of the valve core and the valve seat), the spring is gradually compressed, after the valve seat and the seat sleeve lose the acting force of the valve core on the valve seat and the seat sleeve, the valve seat and the seat sleeve move towards one side of the sleeve under the action of the disc spring until the extending part of the seat sleeve is attached to the limiting part, the moving distance of the valve seat and the seat sleeve is the length of the buffer gap (as shown in figure 2, the section is a first section of conduction action stroke), the valve core continues to move towards one side of the pressure regulating cylinder, the valve core and the valve seat lose contact fit (as shown in figure 3, the section is a second section of conduction action stroke), and at the moment, a passage is formed between the liquid inlet hole and the liquid outlet hole to enable the safety valve to be in a conduction state; when the liquid inlet hole stops liquid from entering, the liquid inlet hole and the valve core move towards one side of the pressure regulating cylinder, the liquid inlet hole and the valve core can be divided into two sections of strokes in the reset process (the two sections of strokes are bounded by the contact of the valve core and the valve seat), the valve core moves towards one side of the joint under the action of the spring to reset (the section is a first section of closing action stroke), after the valve core is contacted with the valve seat, the seat sleeve receives the acting force applied to the valve core by the valve core, and the disc spring is gradually compressed until the initial state (the section is a second section of closing action stroke) is reached to a balanced state.
2. The principle of hydraulic balance is adopted: when oil enters from the liquid inlet hole, the oil acts on the side surface S1 of the valve core close to the joint, the valve core moves towards the sleeve direction by overcoming the elasticity of the spring, meanwhile, the oil enters the inner cavity of the valve core from the damping channel until the pressure regulating cavity is filled, and the oil of the pressure regulating cavity acts on the side surface S2 of the valve core close to the pressure regulating cylinder to slow down the acting force of the oil in the liquid inlet hole on the valve core, so that the valve core has a buffering effect when being opened. When the safety valve is in a conducting equilibrium state (a liquid inlet hole and a liquid outlet hole form a passage), the force applied to the valve core is F1= the force applied to the side surface S1 of the valve core by the oil liquid-the force applied to the side surface S2 of the valve core by the oil liquid-the friction force F3 between the valve core and a contact component (the friction force is negligible) can be obtained through stress analysis.
3. The sealing mode of the valve core and the inner wall of the main valve body is changed: the inner annular inclined surface of the valve seat is attached to the outer annular inclined surface of the valve core to form a contact surface, and the spring and the disc spring respectively generate opposite acting forces on the valve core to enable the contact surfaces of the valve core and the valve core to be tightly attached to each other; after the valve core and the valve seat are not matched, oil can flow to the liquid discharge hole from the liquid inlet hole immediately, and the safety valve is high in response speed and rapid in working flow lifting when being conducted.
In conclusion, on the basis of not increasing the volume, the safety valve of the invention relieves the acting force of oil on the valve core when the valve core is opened by arranging the buffering and lengthening component and applying the hydraulic balance principle and changing the sealing structure of the inner wall of the valve core, improves the sealing performance, avoids the joints and related parts from being crushed, ensures the stability and reliability of the use of the safety valve, and can meet the pressure test requirement of the working flow of 5000L/min.
The present invention may be embodied in many other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications in accordance with the present invention can be made by those skilled in the art without departing from the spirit or essential attributes thereof and that such changes and modifications are to be considered as equivalents within the scope of the appended claims.
Claims (10)
1. A large-flow safety valve comprises a main valve body, a sleeve connected to one end of the main valve body, a joint connected to the other end of the main valve body, a valve core movably connected in the sleeve and the main valve body, a spring sleeved on the valve core, a spring seat connected to the valve core, and a pressure regulating cylinder arranged in the sleeve and connected with the valve core, wherein one end of the spring is supported on the spring seat, the other end of the spring is supported on the pressure regulating cylinder, a valve core inner cavity is formed in the valve core, at least one liquid discharge hole is formed in the main valve body, a liquid inlet hole is formed in the joint, and the valve core acts to control the conduction between the liquid inlet hole and the liquid discharge hole, and the large-flow safety valve is characterized in that: be provided with buffering benefit length subassembly in the joint, buffering benefit length subassembly is connected with the case and is formed the linkage cooperation, when case action made the relief valve switch on, buffering benefit length subassembly can form one section displacement to sleeve one side action, the protruding extension post that forms of one end of case, it forms the damping passageway in the post to extend, the damping passageway communicates with each other with feed liquor hole and case inner chamber respectively, form the pressure regulating cavity of the diameter adaptation of internal diameter and case on the pressure regulating jar, the other end of case is connected in the pressure regulating cavity, and the pressure regulating cavity communicates with each other with the case inner chamber.
2. The mass flow safety valve of claim 1, wherein: the buffering and lengthening assembly comprises a seat sleeve connected in the joint, an elastic piece arranged between the seat sleeve and the joint, and a valve seat connected on the seat sleeve, and the valve core abuts against the valve seat.
3. The mass flow safety valve of claim 2, wherein: an annular cavity is formed between the outer wall of the seat sleeve and the inner wall of the joint, and the elastic piece is arranged in the annular cavity.
4. The high flow safety valve of claim 2 or 3, wherein: the valve core is attached to the valve seat through the outer annular inclined surface and the inner annular inclined surface to form a matching, the inner wall of the main valve body forms an annular limiting part, the valve seat is arranged on one side of the limiting part, and the liquid discharge hole is arranged on the other side of the limiting part.
5. The high flow safety valve of claim 4, wherein: the position of the seat sleeve opposite to the limiting part forms an extending part, the valve seat is fixed on the extending part, and when the valve core does not act, a buffer gap is formed between the extending part and the limiting part and between the extending part and the valve seat and the limiting part.
6. The mass flow safety valve of claim 2 or 3 or 5, wherein: the elastic part adopts a disc spring.
7. The high flow safety valve of claim 2, 3 or 5, wherein: the two liquid discharge holes are symmetrically formed in two sides of the valve core, the extension column is located at the axis position of the valve core, and an arc-shaped concave surface is formed at the joint of the extension column and the valve core.
8. The mass flow safety valve of claim 2 or 3 or 5, wherein: a first sealing structure is arranged between the inner wall of the pressure regulating chamber and the outer wall of the valve core, a second sealing structure is arranged between the inner wall of the main valve body and the outer wall of the valve core, and a third sealing structure is arranged between the outer wall of the seat sleeve and the inner wall of the joint.
9. The mass flow safety valve of claim 8, wherein: the first sealing structure, the second sealing structure and the third sealing structure all comprise O-shaped sealing rings and check rings.
10. The high flow safety valve of claim 2, 3 or 5, wherein: the valve seat is made of a special polyether-ether-ketone high polymer material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110345928.3A CN113006839B (en) | 2021-03-31 | 2021-03-31 | Large-flow safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110345928.3A CN113006839B (en) | 2021-03-31 | 2021-03-31 | Large-flow safety valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113006839A CN113006839A (en) | 2021-06-22 |
| CN113006839B true CN113006839B (en) | 2023-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110345928.3A Active CN113006839B (en) | 2021-03-31 | 2021-03-31 | Large-flow safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113006839B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4548231A (en) * | 1978-07-11 | 1985-10-22 | Schwede Franz Josef | Pilot-operated pressure-limiting valve with a feeding function |
| US4790347A (en) * | 1986-11-06 | 1988-12-13 | Gewerkschaft Eisenhutte Westfalia Gmbh | Pressure-relief valve devices |
| RU2188953C1 (en) * | 2001-10-18 | 2002-09-10 | Институт горного дела СО РАН | Safety valve for protection of hydraulic prop from static and dynamic loads |
| CN203925539U (en) * | 2014-07-14 | 2014-11-05 | 巨隆集团芜湖兴隆液压有限公司 | A kind of high-flow safety valve |
| CN105673056A (en) * | 2016-02-22 | 2016-06-15 | 巨隆集团芜湖兴隆液压有限公司 | Hard sealing safety valve |
| CN206530747U (en) * | 2017-03-16 | 2017-09-29 | 重庆欧金机电制造有限公司 | A kind of New type pressure regulating valve of soft and hard seal combination |
-
2021
- 2021-03-31 CN CN202110345928.3A patent/CN113006839B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4548231A (en) * | 1978-07-11 | 1985-10-22 | Schwede Franz Josef | Pilot-operated pressure-limiting valve with a feeding function |
| US4790347A (en) * | 1986-11-06 | 1988-12-13 | Gewerkschaft Eisenhutte Westfalia Gmbh | Pressure-relief valve devices |
| RU2188953C1 (en) * | 2001-10-18 | 2002-09-10 | Институт горного дела СО РАН | Safety valve for protection of hydraulic prop from static and dynamic loads |
| CN203925539U (en) * | 2014-07-14 | 2014-11-05 | 巨隆集团芜湖兴隆液压有限公司 | A kind of high-flow safety valve |
| CN105673056A (en) * | 2016-02-22 | 2016-06-15 | 巨隆集团芜湖兴隆液压有限公司 | Hard sealing safety valve |
| CN206530747U (en) * | 2017-03-16 | 2017-09-29 | 重庆欧金机电制造有限公司 | A kind of New type pressure regulating valve of soft and hard seal combination |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113006839A (en) | 2021-06-22 |
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Denomination of invention: A high flow safety valve Effective date of registration: 20231212 Granted publication date: 20230117 Pledgee: Industrial and Commercial Bank of China Limited Yueqing sub branch Pledgor: FNORE HIGH-TECH HYDRAULIC CO.,LTD. Registration number: Y2023980070666 |
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