CN210859941U - High-pressure reducing valve - Google Patents
High-pressure reducing valve Download PDFInfo
- Publication number
- CN210859941U CN210859941U CN201921791839.6U CN201921791839U CN210859941U CN 210859941 U CN210859941 U CN 210859941U CN 201921791839 U CN201921791839 U CN 201921791839U CN 210859941 U CN210859941 U CN 210859941U
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- Prior art keywords
- valve
- external pipeline
- clack
- valve rod
- water inlet
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- Expired - Fee Related
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- 238000007789 sealing Methods 0.000 claims abstract description 75
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- 238000003825 pressing Methods 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 24
- 238000009434 installation Methods 0.000 claims description 9
- 239000007779 soft material Substances 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims 2
- 230000006837 decompression Effects 0.000 claims 1
- 230000000670 limiting effect Effects 0.000 abstract description 19
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000005034 decoration Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 125000003003 spiro group Chemical group 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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- Safety Valves (AREA)
Abstract
The utility model discloses a high-pressure reducing valve, which is characterized in that the high-pressure reducing valve comprises a valve body, a water inlet channel and a water outlet channel which are communicated with each other, a valve seat, a valve cover, a valve rod, a valve clack, a diaphragm pressing plate, an elastic diaphragm and a spring, wherein the top of the valve cover is provided with a water inlet and a water outlet, a first external pipeline is arranged between the water inlet channel and the water inlet, the first external pipeline is provided with a first pressure gauge, a needle valve and a third ball valve, a second external pipeline is arranged between the water outlet channel and the water outlet, the second external pipeline is provided with a second pressure gauge, a pressure reducing pilot valve, a first ball valve and a second ball valve, a sealing ring is arranged between the valve clack and the valve seat, one side of the valve clack facing the valve seat is provided with a limiting groove, the axial size of the sealing ring, the high-pressure reducing valve improves the sealing performance and prolongs the service life through a soft and hard combined sealing mode.
Description
Technical Field
The utility model relates to the technical field of valves, more specifically say, it relates to a high pressure relief pressure valve.
Background
The pressure reducing valve is a valve which reduces the inlet pressure to a certain required outlet pressure through regulation and leads the outlet pressure to be automatically kept stable by relying on the energy of the medium. From the viewpoint of hydrodynamics, the pressure reducing valve is a throttling element with variable local resistance, namely, the flow speed and the kinetic energy of fluid are changed by changing the throttling area to cause different pressure losses, thereby achieving the purpose of pressure reduction. Then, the fluctuation of the pressure behind the valve is balanced with the spring force by means of the regulation of the control and regulation system, so that the pressure behind the valve is kept constant within a certain error range.
The existing pressure reducing valve generally adopts one form of soft sealing or hard sealing, wherein the hard sealing generally has the defects of higher processing precision requirement, poorer sealing performance and the like; the soft seal also has the disadvantages of easy aging and easy abrasion, which results in short service life, especially in high-pressure use environment, the manufacturing requirement for the hard seal is extremely strict, which causes more manufacturing cost to be consumed, and the service life of the soft seal becomes shorter.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a high pressure reducing valve, this high pressure reducing valve have improved sealing performance through the sealed form of soft or hard combination and have increased life.
In order to achieve the above purpose, the utility model provides a following technical scheme: a high-pressure reducing valve comprises a valve body, a water inlet channel and a water outlet channel which are communicated with each other and arranged at the left end and the right end of the valve body, a valve seat arranged between the water inlet channel and the water outlet channel, a valve cover arranged at the top of the valve body in a sealing mode, and a valve rod movably connected in the valve body in a lifting mode, wherein a valve clack capable of forming sealing opening and closing with the valve seat is arranged at the lower end of the valve rod;
a water inlet and a water outlet are respectively arranged on two sides of the top of the valve cover, a first external pipeline is arranged between the water inlet channel and the water inlet, a second external pipeline is arranged between the water outlet and the water outlet channel, a first pressure gauge for detecting the pressure of liquid flowing through the first external pipeline is arranged on the first external pipeline, a needle valve for controlling the liquid flow of the first external pipeline is arranged between the first pressure gauge and the water inlet, the second external pipeline is provided with a second pressure gauge for detecting the pressure of the liquid flowing through the second external pipeline, a pressure reducing pilot valve is arranged between the second pressure gauge and the water outlet, a first ball valve for controlling the liquid flow at the water outlet is arranged between the second pressure gauge and the water outlet channel, a second ball valve is arranged between the second pressure gauge and the second external connecting pipeline, and a third ball valve is arranged between the first pressure gauge and the first external connecting pipeline;
the sealing ring is characterized in that a sealing ring made of soft materials is arranged between the valve clack and the valve seat, a limiting groove for placing the sealing ring is formed in one side, facing the valve seat, of the valve clack, a deformation gap for radial deformation of the sealing ring is formed between the sealing ring and the limiting groove, the axial size of the sealing ring is larger than the depth size of the limiting groove, a first sealing surface is arranged on one side, facing the valve seat, of the valve clack, and a second sealing surface capable of being in soft sealing with the sealing ring and in hard sealing with the first sealing surface is arranged on one side.
The utility model discloses further set up to: be provided with the installation screw that runs through to the spacing inslot on the circumference lateral wall of valve clack, the installation screw is provided with a plurality ofly and arranges along the circumference lateral wall equidistance of valve clack, the position that corresponds the installation screw on the sealing washer is provided with the spliced eye, threaded connection has mounting bolt in the installation screw, mounting bolt is provided with the gag lever post that can insert in the spliced eye towards the one end of spliced eye, the diameter size of gag lever post is less than the diameter size of spliced eye.
The utility model discloses further set up to: be provided with the passageway that slides in the valve gap, the upper end of valve rod is passed the diaphragm clamp plate and is slided the cooperation with the passageway that slides, the lower extreme of valve rod can pass valve clack downwardly extending and set up, the spring housing is established outside the valve rod, the upside of diaphragm clamp plate is provided with and can fastens the first nut on the valve rod with the diaphragm clamp plate, the downside of valve clack is provided with and can fastens the second nut on the valve rod with the valve clack.
The utility model discloses further set up to: the fixed plate is fixedly mounted on the valve seat, a limiting buckle for preventing the valve rod from shaking and deviating is arranged at one end, facing the valve rod, of the fixed plate, a through hole for the valve rod to penetrate is formed in the limiting buckle, and the inner diameter of the through hole is matched with the outer diameter of the valve rod.
The utility model discloses further set up to: the valve cover is in threaded connection with the valve body through a plurality of locking bolts.
The utility model discloses further set up to: the two ends of the elastic diaphragm are respectively positioned at the screw joint parts of the two locking bolts, and the elastic diaphragm is provided with a through hole for the locking bolts to pass through.
To sum up, the utility model discloses following beneficial effect has: through the design of first sealed face and sealing washer and the sealed face of second, realize the technique that soft or hard combines for the valve clack is at the downstream in-process, and the sealed face of second on the sealing washer can be prior to the disk seat butts earlier and makes the sealing washer take place deformation, and it is full of to fill out the deformation clearance in the sealing washer totally, and at this moment the sealed face of second and the butt of first sealed face realize hard sealing. Improve sealed effect through the cooperation of hard seal and soft seal, even if under 0.6MPA to 6.4MPA high pressure condition, can both play fine sealed effect, reduce hard closed manufacturing requirement in addition, reduce manufacturing cost, improve manufacturing efficiency to and outside metal protects inside sealing washer, thereby reduce the wearing and tearing of sealing washer, effectively increase the life of sealing washer.
Drawings
FIG. 1 is a schematic view of the internal structure of a high pressure reducing valve;
FIG. 2 is a schematic perspective view of a valve seat of the valve flap;
fig. 3 is a schematic diagram of the exploded structure of the valve flap.
Reference numerals: 1. a valve body; 11. a water inlet channel; 12. a water outlet channel; 13. a valve seat; 131. a second sealing surface; 132. a fixing plate; 133. a limit buckle; 14. a valve stem; 15. a valve flap; 151. a limiting groove; 152. a first sealing surface; 153. a deformation gap; 154. mounting a screw hole; 155. installing a bolt; 156. a limiting rod; 16. a diaphragm pressing plate; 17. an elastic diaphragm; 18. a spring; 19. a seal ring; 191. inserting holes; 2. a valve cover; 21. a slipping channel; 22. a first nut; 23. a second nut; 24. locking the bolt; 25. a water inlet; 26. a water outlet; 3. a first external pipe; 31. a first pressure gauge; 311. a third ball valve; 32. a needle valve; 33. a pressure reducing pilot valve; 34. a second pressure gauge; 341. a second ball valve; 35. a first ball valve; 36. the second external pipeline.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Referring to fig. 1 to 3, in order to achieve the above object, the present invention provides the following technical solutions: a high-pressure reducing valve comprises a valve body 1, a water inlet channel 11 and a water outlet channel 12 which are communicated with each other and arranged at the left end and the right end of the valve body 1, a valve seat 13 arranged between the water inlet channel 11 and the water outlet channel 12, a valve cover 2 arranged at the top of the valve body 1 in a sealing way, and a valve rod 14 movably connected in the valve body 1 in a lifting way, wherein the lower end of the valve rod 14 is provided with a valve clack 15 capable of forming a sealing opening and closing way with the valve seat 13, the upper end of the valve rod 14 is provided with two diaphragm pressing plates 16 capable of separating the water outlet channel 12 from a cavity in the valve cover 2, the diaphragm pressing plates 16 are symmetrically arranged up and down, an elastic diaphragm 17 capable of isolating upper liquid from lower liquid is arranged between the two diaphragm pressing plates 16, a spring 18 is arranged in the cavity of the;
a water inlet 25 and a water outlet 26 are respectively arranged on two sides of the top of the valve cover 2, a first external pipeline 3 is arranged between the water inlet 11 and the water inlet 25, a second external pipeline 36 is arranged between the water outlet 26 and the water outlet 12, a first pressure gauge 31 for detecting the pressure of liquid flowing through the first external pipeline 3 is arranged on the first external pipeline 3, a needle valve 32 for controlling the liquid flow of the first external pipeline 3 is arranged between the first pressure gauge 31 and the water inlet 25, a second pressure gauge 34 for detecting the pressure of liquid flowing through the second external pipeline 36 is arranged on the second external pipeline 36, a pressure reducing pilot valve 33 is arranged between the second pressure gauge 34 and the water outlet 26, a first ball valve 35 for controlling the liquid flow of the water outlet 26 is arranged between the second pressure gauge 34 and the second external pipeline 36, a second ball valve 341 is arranged between the second pressure gauge 34 and the second external pipeline 36, and a third ball valve 311 is arranged between the first pressure gauge 31 and the;
a sealing ring 19 made of soft material is arranged between the valve flap 15 and the valve seat 13, a limiting groove 151 for placing the sealing ring 19 is arranged on one side of the valve flap 15 facing the valve seat 13, a deformation gap 153 for radial deformation of the sealing ring 19 is arranged between the sealing ring 19 and the limiting groove 151, the axial dimension of the sealing ring 19 is greater than the depth dimension of the limiting groove 151, a first sealing surface 152 is arranged on one surface of the valve flap 15 facing the valve seat 13, and a second sealing surface 131 capable of respectively soft sealing with the sealing ring 19 and hard sealing with the first sealing surface 152 is arranged on one surface of the valve seat 13 facing the valve flap 15.
The utility model discloses a design, high-pressure rivers enter into and produce into pressure of intaking in the water inlet channel 11, and rethread external pipeline 3 again gets into in the cavity of valve gap 2 through water inlet 25 under the effect of needle valve 32 to establish decurrent fluid pressure. The pressure in the water outlet channel 12 is firstly opposed to the spring 18 through the external pipe 3 under the action of the pressure reducing pilot valve 33. When the water outlet pressure exceeds the set value of the pressure reducing pilot valve 33 and the spring 18, the pressure reducing pilot valve 33 is closed, the discharge capacity of the cavity of the valve cover 2 is 0, the liquid pressure reaches the maximum value, the valve clack 15 is tightly attached to the valve seat 13, and the pressure reducing valve is closed. When the downstream pressure is greater than the spring 18 setting of the pressure reducing pilot valve 33, the pressure reducing pilot valve 33 opens and the liquid in the cavity of the bonnet 2 will flow through the outlet port 26, through the pressure reducing pilot valve 33, through the first ball valve 35, and to the outlet passage 12. Because the opening degree of the needle valve 32 is smaller, and the diameter of the inlet end of the external pipeline 3 is smaller than that of the outlet end of the external pipeline 3, the drainage speed is larger than the water supplementing degree, so that the liquid pressure in the cavity of the valve cover 2 is gradually reduced, the valve clack 15 is supported by the water inlet pressure in the water inlet channel 11, the pressure reducing valve is opened, the liquid in the water inlet channel 11 directly flows to the water outlet channel 12, the drainage quantity and the water supplementing quantity are kept stable, and the pressure of the water outlet channel 12 is kept stable.
Through the design of the first sealing surface 152, the sealing ring 19 and the second sealing surface 131, the technology of soft and hard combination is realized, so that in the downward movement process of the valve flap 15, the sealing ring 19 can be firstly abutted against the second sealing surface 131 on the valve seat 13 to deform the sealing ring 19, the deformation gap 153 in the limiting groove 151 is filled, and at this time, the second sealing surface 131 is abutted against the first sealing surface 152 to realize hard sealing. Improve sealed effect through the cooperation of hard seal and soft seal, even if under 0.6MPA to 6.4MPA high pressure circumstances, can both play fine sealed effect, reduce hard closed manufacturing requirement in addition, reduce manufacturing cost, improve manufacturing efficiency to and outside metal protects inside sealing washer 19, thereby reduce the wearing and tearing of sealing washer 19, effectively increase sealing washer 19's life.
The circumferential outer side wall of the valve clack 15 is provided with a plurality of mounting screw holes 154 penetrating into the limiting groove 151, the mounting screw holes 154 are arranged at equal intervals along the circumferential outer side wall of the valve clack 15, the positions of the sealing ring 19 corresponding to the mounting screw holes 154 are provided with inserting holes 191, mounting bolts 155 are screwed in the mounting screw holes 154, one ends of the mounting bolts 155 facing the inserting holes 191 are provided with limiting rods 156 capable of being inserted into the inserting holes 191, the diameter size of the limiting rods 156 is smaller than that of the inserting holes 191, the design can be used in the follow-up process, even if the quality problem of the sealing ring 19 occurs and the sealing ring needs to be replaced, the mounting bolts 155 can be detached from the mounting screw holes 154, the limiting effect on the sealing ring 19 is removed, then the operation of replacing the sealing ring 19 is carried out, and the design of the limiting rods 156 can play a limiting effect on, the design of the mounting structure between the limiting groove 151 and the sealing ring 19 can prolong the service life of the product, and the whole product cannot be scrapped due to the damage of the sealing ring 19.
Be provided with the passageway 21 that slides in the valve gap 2, diaphragm clamp plate 16 is passed and with the cooperation that slides of passageway 21 to the upper end of valve rod 14, the lower extreme of valve rod 14 can pass valve clack 15 downwardly extending setting, spring 18 cover is established outside valve rod 14, the upside of diaphragm clamp plate 16 is provided with can be with the first nut 22 of diaphragm clamp plate 16 fastening on valve rod 14, the downside of valve clack 15 is provided with can be with the second nut 23 of valve clack 15 fastening on valve rod 14, this design can be with valve gap 2, diaphragm clamp plate 16, valve clack 15 is in the same straight line through the series connection of valve rod 14, thereby very convenient play the center pin and be in same straight line, guarantee in the use, the phenomenon that the skew can not appear in the removal of valve clack 15.
Fixed mounting has fixed plate 132 on the disk seat 13, fixed plate 132 is provided with the spacing knot 133 that prevents the shake skew of valve rod 14 towards the one end of valve rod 14, be provided with the through-hole that supplies valve rod 14 to pass on the spacing knot 133, the internal diameter size of through-hole and the external diameter size looks adaptation of valve rod 14, this design can play the fixed effect of secondary to the valve rod 14 in the water channel 11 of intaking under the circumstances that high pressure was intake, prevent to cause the shake under the impact of high pressure water, phenomenons such as rock, thereby guarantee the stability of relief pressure valve in the use.
The valve cover 2 is in threaded connection with the valve body 1 through the locking bolts 24, the valve cover 2 is firm to mount and convenient to dismount, and in the using process, the sealing ring 19 is required to be replaced, so that the valve body 1 and the valve cover 2 can be separated by removing the locking bolts 24.
Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A high pressure reducing valve is characterized in that: comprises a valve body (1), a water inlet channel (11) and a water outlet channel (12) which are communicated with each other and are arranged at the left end and the right end of the valve body (1), a valve seat (13) arranged between the water inlet channel (11) and the water outlet channel (12), a valve cover (2) which is hermetically arranged at the top of the valve body (1), and a valve rod (14) which is movably connected in the valve body (1) in a lifting way, wherein the lower end of the valve rod (14) is provided with a valve clack (15) which can form a sealing opening and closing way with the valve seat (13), the upper end of the valve rod (14) is provided with two diaphragm pressing plates (16) which can separate the water outlet channel (12) from a cavity in the valve cover (2), the diaphragm pressing plates (16) are symmetrically arranged up and down, an elastic diaphragm (17) which can isolate upper liquid from lower liquid is arranged between the, two ends of the spring (18) are respectively abutted against the diaphragm pressing plate (16) and the valve cover (2) and drive the diaphragm pressing plate (16) to move downwards;
the utility model discloses a valve gap (2) top, including valve gap (2), delivery port (26), inhalant canal (11) and water inlet (25) are provided with first external pipeline (3) between, be provided with second external pipeline (36) between delivery port (26) and exhalant canal (12), be provided with on first external pipeline (3) and detect first manometer (31) of flowing through first external pipeline (3) interior liquid pressure, be provided with between first manometer (31) and water inlet (25) and control first external pipeline (3) liquid flow's needle valve (32), be provided with on second external pipeline (36) and detect second manometer (34) of flowing through second external pipeline (36) interior liquid pressure, be provided with between second manometer (34) and delivery port (26) decompression pilot valve (33), be provided with between second manometer (34) and exhalant canal (12) and control delivery port (26) liquid flow's second manometer (34) and exhalant canal (12) liquid flow's second manometer (34) A second ball valve (341) is arranged between the second pressure gauge (34) and the second external pipeline (36), and a third ball valve (311) is arranged between the first pressure gauge (31) and the first external pipeline (3);
be provided with sealing washer (19) that the soft material was made between valve clack (15) and valve seat (13), valve clack (15) are provided with spacing groove (151) that supply sealing washer (19) to place towards one side of valve seat (13), be provided with deformation clearance (153) that supply sealing washer (19) radial deformation between sealing washer (19) and spacing groove (151), the axial dimension of sealing washer (19) is greater than the degree of depth size of spacing groove (151), valve clack (15) are provided with first sealed face towards the one side of valve seat (13), valve seat (13) are provided with the second sealed face that can soft seal respectively with sealing washer (19), seal with first sealed face firmly towards the one side of valve clack (15).
2. A high pressure relief valve as claimed in claim 1, wherein: be provided with on the circumference lateral wall of valve clack (15) and run through installation screw (154) to in spacing groove (151), installation screw (154) are provided with a plurality ofly and arrange along the circumference lateral wall equidistance of valve clack (15), the position that corresponds installation screw (154) on sealing washer (19) is provided with spliced eye (191), threaded connection has mounting bolt (155) in installation screw (154), mounting bolt (155) are provided with gag lever post (156) that can insert in spliced eye (191) towards the one end of spliced eye (191), the diameter size of gag lever post (156) is less than the diameter size of spliced eye (191).
3. A high pressure relief valve as claimed in claim 1, wherein: be provided with in valve gap (2) and slide passageway (21), the upper end of valve rod (14) is passed diaphragm clamp plate (16) and is slided the cooperation with slide passageway (21), the lower extreme of valve rod (14) can pass valve clack (15) downwardly extending setting, spring (18) cover is established outside valve rod (14), the upside of diaphragm clamp plate (16) is provided with first nut (22) that can fasten diaphragm clamp plate (16) on valve rod (14), the downside of valve clack (15) is provided with second nut (23) that can fasten valve clack (15) on valve rod (14).
4. A high pressure relief valve as claimed in claim 3, wherein: fixed mounting has fixed plate (132) on disk seat (13), fixed plate (132) are provided with spacing knot (133) that prevent valve rod (14) shake skew towards the one end of valve rod (14), be provided with the through-hole that supplies valve rod (14) to pass on spacing knot (133), the internal diameter size of through-hole and the external diameter size looks adaptation of valve rod (14).
5. A high pressure relief valve as claimed in claim 1, wherein: the valve cover (2) is in threaded connection with the valve body (1) through a plurality of locking bolts (24).
6. A high pressure relief valve as claimed in claim 5, wherein: the two ends of the elastic membrane (17) are respectively located at the screw connection positions of the two locking bolts (24), and the elastic membrane (17) is provided with a through hole for the locking bolts (24) to pass through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921791839.6U CN210859941U (en) | 2019-10-23 | 2019-10-23 | High-pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921791839.6U CN210859941U (en) | 2019-10-23 | 2019-10-23 | High-pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210859941U true CN210859941U (en) | 2020-06-26 |
Family
ID=71292682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921791839.6U Expired - Fee Related CN210859941U (en) | 2019-10-23 | 2019-10-23 | High-pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210859941U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576768A (en) * | 2020-12-21 | 2021-03-30 | 纽威石油设备（苏州）有限公司 | Adjustable pressure release valve |
| CN114562597A (en) * | 2022-02-08 | 2022-05-31 | 浙江伯特利科技股份有限公司 | Spring film type pressure reducing valve for cold and hot water pipe network |
-
2019
- 2019-10-23 CN CN201921791839.6U patent/CN210859941U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576768A (en) * | 2020-12-21 | 2021-03-30 | 纽威石油设备（苏州）有限公司 | Adjustable pressure release valve |
| CN114562597A (en) * | 2022-02-08 | 2022-05-31 | 浙江伯特利科技股份有限公司 | Spring film type pressure reducing valve for cold and hot water pipe network |
| CN114562597B (en) * | 2022-02-08 | 2023-05-30 | 浙江伯特利科技股份有限公司 | Spring film type pressure reducing valve for cold and hot water pipe network |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200626 |
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| CF01 | Termination of patent right due to non-payment of annual fee |