CN205226501U - Formula of relying on oneself relief pressure valve - Google Patents
Formula of relying on oneself relief pressure valve Download PDFInfo
- Publication number
- CN205226501U CN205226501U CN201520920048.4U CN201520920048U CN205226501U CN 205226501 U CN205226501 U CN 205226501U CN 201520920048 U CN201520920048 U CN 201520920048U CN 205226501 U CN205226501 U CN 205226501U
- Authority
- CN
- China
- Prior art keywords
- valve
- air chamber
- balance
- lid
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Safety Valves (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The utility model relates to a formula of relying on oneself relief pressure valve, which comprises the following components: a valve body, bottom with valve body bottom sealing connection, and the valve gap of being connected with valve body top seal, be equipped with the last passageway and lower passageway that lead to through the main valve seated connection in the valve body, be equipped with the valve rod that freely removes in valve body and the valve gap, the valve rod top is through a regulating spring junction valve caping portion, main valve spring coupling bottom is passed through to the valve rod bottom, the valve rod bottom is equipped with the case that forms sealed face with the main valve seat, be equipped with balanced air chamber in the valve gap, balanced air chamber is separated for upper and lower two parts by the balanced lid of being connected with the valve rod, the case includes the first sealed lid with the awl body structure of main valve seat seal contact, and the second that sets up in first sealed lid below seals the lid, the both ends of the sealed lid of second are equipped with sealedly protruding, the main valve seat is equipped with the recess rather than matcing with this bellied position that corresponds. Compared with the prior art, the utility model has the advantages of high, the difficult wearing and tearing of sealed degree, long service life.
Description
Technical field
The utility model relates to a kind of reduction valve, especially relates to a kind of Self-operated pressure reducing valve.
Background technique
The steam inlet place of ultrafiltration front-mounted heating device is provided with Self-operated pressure reducing valve usually, and the ultrafiltration of ultrafiltration front-mounted heating device runs and has himself feature: often overlap ultrafiltration run continuously after 27 minutes by carry out 3 minutes from backwash, the backwash time period will stop into water, namely heat without the need to steam.A few cover ultrafiltration paired running system just causes front-mounted heating device Self-operated pressure reducing valve and frequently adjusts, and cause reduction valve main valve seat and attached valve bounce to move frequent, sealing surface Rapid Damage, service time is short.
Model utility content
The purpose of this utility model be exactly in order to overcome above-mentioned prior art exist defect and a kind of Self-operated pressure reducing valve is provided.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of Self-operated pressure reducing valve, comprise valve body, the bottom be tightly connected with body base, and the valve gap to be tightly connected with body top, the upper channel connected by main valve seat and lower channel is provided with in described valve body, the valve rod moved freely is provided with in described valve body and valve gap, this valve stem tip is by the first Regulation spring connection valve tops, valve rod bottom connects bottom by main spool spring, described stem bottom is provided with the spool forming sealing surface with main valve seat close contact, balance air chamber is provided with in described valve gap, on this balance air chamber is divided into by the balance lid be connected with valve rod, lower two-part, the upper part of described balance air chamber is connected by upper channel vent and upper channel, lower part is connected by lower channel pore and lower channel, described spool comprises the first sealing cover sealing the taper structure contacted with main valve seat, and the second sealing cover be arranged on below the first sealing cover, the two ends of the second described sealing cover are provided with seal convexity, described main valve seat is provided with the corresponding position of this projection the groove mated with it.
Described projection is also provided with sealed groove, in sealing groove, seal washer is set.
The first described sealing cover is connected by spring structure with the second sealing cover.
Described valve gap comprises the first valve gap and the second valve gap, and the first described valve bonnet seal is arranged on body top, and the second described valve bonnet seal is arranged on the first valve gap top.
Described balance lid comprises and to contact with balance air chamber edge seal and to be separated into first of upper, middle, and lower part and to balance by balancing air chamber and cover and second balance and cover, described the first balance lid and second is fixedly connected with by fixing rod between balancing and covering, the first described balance lid is arranged in the first valve gap, and move up and down along the lower part of balance air chamber, the second described balance lid is arranged in the second valve gap, and move up and down along the upper part of balance air chamber, the second described balance covers end face and is connected with the first Regulation spring.
The lower end surface of the first described balance lid connects valve rod by the second Regulation spring.
The first described Regulation spring top is arranged on the adjusting bolt anatomical connectivity at the second valve gap top with sealing, by regulating adjusting bolt structure to move up and down, stretching or compression the first Regulation spring, can arrange the upstream pressure value that spool can be made to open.
The surface of described main valve seat is also provided with the STL overlay cladding of a layer thickness 1 ~ 2mm.
Described spool is STL built-up welding spool.
Self-operated pressure reducing valve of the present utility model is when normal state, spool is at main spool spring and the first Regulation spring, closely main valve seat is adjacent under the compound action of the second Regulation spring, form sealing surface, thus cut off upper channel and lower channel, during work, steam enters from upper channel, wherein a part enters the upper part of balance air chamber along upper channel vent, along with the increase of inlet, air pressure in the upper part of balance air chamber increases gradually, and force the second valve gap to move downward and compress the second Regulation spring, thus an active force that valve rod and spool are moved down is provided, thus the first sealing cover of auxiliary spool and the second sealing cover separate with main valve seat successively, connect upper channel and lower channel, when the vapor pressure in lower channel increases, some vapor enters the lower part of balance air chamber with lower channel vent, along with the pressure in the lower part of balance air chamber increases gradually, and when exceeding the sums such as the air pressure of balance air chamber upper part and self gravitation, promote the first valve gap moves, and pull valve rod by the second Regulation spring, band movable valve plug moves, thus reduce the opening degree of main valve seat, and then reduce the steam flow entering lower channel from upper channel, thus teaching display stand regulates the effect of decompression.
Compared with prior art, the utility model has the following advantages:
(1) spool and main valve seat seal and contact closely, not easily blow loss: employing spool of the present utility model is the form of the first sealing cover and the second sealing cover and main valve seat compound seal, even if make like this to occur blow loss between the first sealing cover of contacting with the sealing of main valve seat, also the second sealing cover is also had to cushion as sealing surface, the sealing effect of its spool can also be increased simultaneously, in addition, the surface of main valve seat is provided with one deck STL overlay cladding, and spool adopts STL built-up welding spool, the hardness of sealing surface can be increased, make it not easily damaged;
(2) flexible adjustment, applied widely: the utility model all adopts mechanical structure to realize operated pressure-reducing, compared to the depressurized system that other electronic equipments control, Applicable scope is wider, and keep in repair more convenient, in addition, by being connected with the first Regulation spring, the second Regulation spring isoequilibrium adjustment member by valve rod, whole adjustment process elasticity is more made.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of spool of the present utility model;
In figure, 1-valve body, 2-bottom, 3-first valve gap, 4-second valve gap, 5-main spool spring, 6-spool, 7-main valve seat, 8-valve rod, 9-second Regulation spring, 10-first balances lid, 11-second balances lid, 12-first Regulation spring, 13-upper channel vent, 14-lower channel vent, 15-seal convexity, 16-sealed groove, 17-balances air chamber, 18-first sealing cover, 19-second sealing cover.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Embodiment 1
A kind of Self-operated pressure reducing valve, its structure as shown in Figure 1, comprise valve body 1, the bottom 2 be connected with valve body 1 sealed bottom, and be successively set on first valve gap 3 and second valve gap 4 at valve body 1 top from top to bottom, first valve gap 3 sealing is arranged on valve body 1 top, second valve gap 4 sealing is arranged on the first valve gap 3 top, the upper channel connected by main valve seat 7 and lower channel is provided with in valve body 1, being provided with in valve body 1 can the valve rod 8 of freely up and down movement, valve rod 8 bottom connects bottom 2 by main spool spring 5, the spool 6 forming sealing surface with main valve seat 7 close contact is provided with bottom valve rod 8, its structure as shown in Figure 2, spool 6 comprises the first sealing cover 18 sealing the taper structure contacted with main valve seat 7, and the second sealing cover 19 be arranged on below the first sealing cover 18 is connected by spring structure, the two ends of the second sealing cover 19 are provided with seal convexity 15, main valve seat 7 is provided with the corresponding position of this projection the groove mated with it, projection is also provided with sealed groove 16, in sealing groove 16, seal washer is set, the surface of main valve seat 7 is also provided with the STL overlay cladding of a layer thickness 1mm, spool 6 is STL built-up welding spool, balance air chamber 17 is provided with in first valve gap 3 and the second valve gap 4, this balance air chamber 17 first is balanced lid 10 and second by what contact with its edges close and balances lid 11 and be divided into, in, lower three parts, first balance lid 10 and second is balanced between lid 11 and is fixedly connected with by fixing rod, first balance lid 10 is arranged in the first valve gap 3, and move up and down along the lower part of balance air chamber 17, the lower end surface of the first balance lid 10 connects valve rod 8 by the second Regulation spring 9, second balance lid 11 is arranged in the second valve gap 4, and move up and down along the upper part of balance air chamber 17, second balance lid 11 upper-end surface is connected with the first Regulation spring 12, first Regulation spring 12 top is arranged on the adjusting bolt anatomical connectivity at the second valve gap 4 top with sealing, the upper part of balance air chamber 17 is connected by upper channel vent 13 and upper channel, lower part is connected by lower channel vent 14 and lower channel.
Self-operated pressure reducing valve is when normal state, spool 6 is at main spool spring 5 and the first Regulation spring 12, main valve seat 7 is closely adjacent under the compound action of the second Regulation spring 9, form sealing surface, thus cut off upper channel and lower channel, during work, steam enters from upper channel, wherein a part enters the upper part of balance air chamber 17 along upper channel vent 13, along with the increase of inlet, air pressure in the upper part of balance air chamber 17 increases gradually, and force the second valve gap 4 to move downward and compress the second Regulation spring 9, thus an active force that valve rod 8 and spool 6 are moved down is provided, thus auxiliary spool 6 separates with main valve seat 7, connect upper channel and lower channel, when the vapor pressure in lower channel increases, some vapor enters the lower part of balance air chamber 17 with lower channel vent 14, along with the pressure in the lower part of balance air chamber 17 increases gradually, and when exceeding the sums such as the air pressure of balance air chamber 17 upper part and self gravitation, promote the first valve gap 3 moves, and pull valve rod 8 by the second Regulation spring 9, band movable valve plug 6 moves, thus reduce the opening degree of main valve seat 7, and then reduce the steam flow entering lower channel from upper channel, thus teaching display stand regulates the effect of decompression.
Embodiment 2
A kind of Self-operated pressure reducing valve, comprise valve body 1, the bottom 2 be connected with valve body 1 sealed bottom, and be successively set on first valve gap 3 and second valve gap 4 at valve body 1 top from top to bottom, first valve gap 3 sealing is arranged on valve body 1 top, second valve gap 4 sealing is arranged on the first valve gap 3 top, the upper channel connected by main valve seat 7 and lower channel is provided with in valve body 1, being provided with in valve body 1 can the valve rod 8 of freely up and down movement, valve rod 8 bottom connects bottom 2 by main spool spring 5, the spool 6 forming sealing surface with main valve seat 7 close contact is provided with bottom valve rod 8, spool 6 comprises the first sealing cover 18 sealing the taper structure contacted with main valve seat 7, and the second sealing cover 19 be arranged on below the first sealing cover 18 is connected by spring structure, the two ends of the second sealing cover 19 are provided with seal convexity 15, main valve seat 7 is provided with the corresponding position of this projection the groove mated with it, projection is also provided with sealed groove 16, in sealing groove 16, seal washer is set, the surface of main valve seat 7 is also provided with the STL overlay cladding of a layer thickness 2mm, spool 6 is STL built-up welding spool, balance air chamber 17 is provided with in first valve gap 3 and the second valve gap 4, this balance air chamber 17 first is balanced lid 10 and second by what contact with its edges close and balances lid 11 and be divided into, in, lower three parts, first balance lid 10 and second is balanced between lid 11 and is fixedly connected with by fixing rod, first balance lid 10 is arranged in the first valve gap 3, and move up and down along the lower part of balance air chamber 17, the lower end surface of the first balance lid 10 connects valve rod 8 by the second Regulation spring 9, second balance lid 11 is arranged in the second valve gap 4, and move up and down along the upper part of balance air chamber 17, second balance lid 11 upper-end surface is connected with the first Regulation spring 12, first Regulation spring 12 top is arranged on the adjusting bolt anatomical connectivity at the second valve gap 4 top with sealing, the upper part of balance air chamber 17 is connected by upper channel vent 13 and upper channel, lower part is connected by lower channel vent 14 and lower channel.
Self-operated pressure reducing valve is when normal state, spool 6 is at main spool spring 5 and the first Regulation spring 12, main valve seat 7 is closely adjacent under the compound action of the second Regulation spring 9, form sealing surface, thus cut off upper channel and lower channel, during work, steam enters from upper channel, wherein a part enters the upper part of balance air chamber 17 along upper channel vent 13, along with the increase of inlet, air pressure in the upper part of balance air chamber 17 increases gradually, and force the second valve gap 4 to move downward and compress the second Regulation spring 9, thus an active force that valve rod 8 and spool 6 are moved down is provided, thus auxiliary spool 6 separates with main valve seat 7, connect upper channel and lower channel, when the vapor pressure in lower channel increases, some vapor enters the lower part of balance air chamber 17 with lower channel vent 14, along with the pressure in the lower part of balance air chamber 17 increases gradually, and when exceeding the sums such as the air pressure of balance air chamber 17 upper part and self gravitation, promote the first valve gap 3 moves, and pull valve rod 8 by the second Regulation spring 9, band movable valve plug 6 moves, thus reduce the opening degree of main valve seat 7, and then reduce the steam flow entering lower channel from upper channel, thus teaching display stand regulates the effect of decompression.
Embodiment 3
A kind of Self-operated pressure reducing valve, comprise valve body 1, the bottom 2 be connected with valve body 1 sealed bottom, and be successively set on first valve gap 3 and second valve gap 4 at valve body 1 top from top to bottom, first valve gap 3 sealing is arranged on valve body 1 top, second valve gap 4 sealing is arranged on the first valve gap 3 top, the upper channel connected by main valve seat 7 and lower channel is provided with in valve body 1, being provided with in valve body 1 can the valve rod 8 of freely up and down movement, valve rod 8 bottom connects bottom 2 by main spool spring 5, the spool 6 forming sealing surface with main valve seat 7 close contact is provided with bottom valve rod 8, spool 6 comprises the first sealing cover 18 sealing the taper structure contacted with main valve seat 7, and the second sealing cover 19 be arranged on below the first sealing cover 18 is connected by spring structure, the two ends of the second sealing cover 19 are provided with seal convexity 15, main valve seat 7 is provided with the corresponding position of this projection the groove mated with it, projection is also provided with sealed groove 16, in sealing groove 16, seal washer is set, the surface of main valve seat 7 is also provided with the STL overlay cladding of a layer thickness 1.5mm, spool 6 is STL built-up welding spool, balance air chamber 17 is provided with in first valve gap 3 and the second valve gap 4, this balance air chamber 17 first is balanced lid 10 and second by what contact with its edges close and balances lid 11 and be divided into, in, lower three parts, first balance lid 10 and second is balanced between lid 11 and is fixedly connected with by fixing rod, first balance lid 10 is arranged in the first valve gap 3, and move up and down along the lower part of balance air chamber 17, the lower end surface of the first balance lid 10 connects valve rod 8 by the second Regulation spring 9, second balance lid 11 is arranged in the second valve gap 4, and move up and down along the upper part of balance air chamber 17, second balance lid 11 upper-end surface is connected with the first Regulation spring 12, first Regulation spring 12 top is arranged on the adjusting bolt anatomical connectivity at the second valve gap 4 top with sealing, the upper part of balance air chamber 17 is connected by upper channel vent 13 and upper channel, lower part is connected by lower channel vent 14 and lower channel.
Self-operated pressure reducing valve is when normal state, spool 6 is at main spool spring 5 and the first Regulation spring 12, main valve seat 7 is closely adjacent under the compound action of the second Regulation spring 9, form sealing surface, thus cut off upper channel and lower channel, during work, steam enters from upper channel, wherein a part enters the upper part of balance air chamber 17 along upper channel vent 13, along with the increase of inlet, air pressure in the upper part of balance air chamber 17 increases gradually, and force the second valve gap 4 to move downward and compress the second Regulation spring 9, thus an active force that valve rod 8 and spool 6 are moved down is provided, thus auxiliary spool 6 separates with main valve seat 7, connect upper channel and lower channel, when the vapor pressure in lower channel increases, some vapor enters the lower part of balance air chamber 17 with lower channel vent 14, along with the pressure in the lower part of balance air chamber 17 increases gradually, and when exceeding the sums such as the air pressure of balance air chamber 17 upper part and self gravitation, promote the first valve gap 3 moves, and pull valve rod 8 by the second Regulation spring 9, band movable valve plug 6 moves, thus reduce the opening degree of main valve seat 7, and then reduce the steam flow entering lower channel from upper channel, thus teaching display stand regulates the effect of decompression.
Above-mentioned is can understand for ease of those skilled in the art and use model utility to the description of embodiment.Person skilled in the art obviously easily can make various amendment to these embodiments, and General Principle described herein is applied in other embodiments and need not through performing creative labour.Therefore, the utility model is not limited to above-described embodiment, and those skilled in the art, according to announcement of the present utility model, do not depart from improvement that the utility model category makes and amendment all should within protection domain of the present utility model.
Claims (9)
1. a Self-operated pressure reducing valve, comprise valve body (1), the bottom (2) be connected with valve body (1) sealed bottom, and the valve gap to be connected with valve body (1) top seal, the upper channel and lower channel connected by main valve seat (7) is provided with in described valve body (1), the valve rod (8) moved freely is provided with in described valve body (1) and valve gap, this valve rod (8) top is by the first Regulation spring (12) connection valve tops, valve rod (8) bottom connects bottom (2) by main spool spring (5), described valve rod (8) bottom is provided with the spool (6) forming sealing surface with main valve seat (7) close contact, balance air chamber (17) is provided with in described valve gap, on this balance air chamber (17) is divided into by the balance lid be connected with valve rod (8), lower two-part, the upper part of described balance air chamber (17) is connected by upper channel vent (13) and upper channel, lower part is connected by lower channel vent (14) and lower channel, it is characterized in that, described spool (6) comprises the first sealing cover (18) sealing the taper structure contacted with main valve seat (7), and be arranged on second sealing cover (19) of the first sealing cover (18) below, the two ends of described the second sealing cover (19) are provided with seal convexity (15), described main valve seat (7) is provided with the corresponding position of this projection the groove mated with it.
2. a kind of Self-operated pressure reducing valve according to claim 1, is characterized in that, described projection is also provided with sealed groove (16), and sealing groove arranges seal washer in (16).
3. a kind of Self-operated pressure reducing valve according to claim 1, is characterized in that, described the first sealing cover (18) is connected by spring structure with the second sealing cover (19).
4. a kind of Self-operated pressure reducing valve according to claim 1, it is characterized in that, described valve gap comprises the first valve gap (3) and the second valve gap (4), described the first valve gap (3) sealing is arranged on valve body (1) top, and described the second valve gap (4) sealing is arranged on the first valve gap (3) top.
5. a kind of Self-operated pressure reducing valve according to claim 4, it is characterized in that, described balance lid comprises and contacts and will balance air chamber (17) be separated into balance air chamber (17) edge seal, in, first balance lid (10) of lower three parts and the second balance lid (11), the first described balance lid (10) and second is balanced to cover between (11) and is fixedly connected with by fixing rod, the first described balance lid (10) is arranged in the first valve gap (3), and move up and down along the lower part of balance air chamber (17), the second described balance lid (11) is arranged in the second valve gap (4), and move up and down along the upper part of balance air chamber (17), second described balance lid (11) upper-end surface is connected with the first Regulation spring (12).
6. a kind of Self-operated pressure reducing valve according to claim 5, is characterized in that, the lower end surface of the first described balance lid (10) connects valve rod (8) by the second Regulation spring (9).
7. a kind of Self-operated pressure reducing valve according to claim 4, is characterized in that, described the first Regulation spring (12) top and sealing are arranged on the adjusting bolt anatomical connectivity at the second valve gap (4) top.
8. a kind of Self-operated pressure reducing valve according to claim 1, is characterized in that, the surface of described main valve seat (7) is also provided with the STL overlay cladding of a layer thickness 1 ~ 2mm.
9. a kind of Self-operated pressure reducing valve according to claim 1, is characterized in that, described spool (6) is STL built-up welding spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520920048.4U CN205226501U (en) | 2015-11-18 | 2015-11-18 | Formula of relying on oneself relief pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520920048.4U CN205226501U (en) | 2015-11-18 | 2015-11-18 | Formula of relying on oneself relief pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205226501U true CN205226501U (en) | 2016-05-11 |
Family
ID=55901567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520920048.4U Active CN205226501U (en) | 2015-11-18 | 2015-11-18 | Formula of relying on oneself relief pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205226501U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224611A (en) * | 2016-08-29 | 2016-12-14 | 永嘉汇正自控泵阀有限公司 | A kind of minute-pressure direct-operated regulator |
| CN110578805A (en) * | 2018-06-08 | 2019-12-17 | 上海漕泾热电有限责任公司 | adjusting valve for high-pressure main steam bypass of waste heat boiler |
-
2015
- 2015-11-18 CN CN201520920048.4U patent/CN205226501U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224611A (en) * | 2016-08-29 | 2016-12-14 | 永嘉汇正自控泵阀有限公司 | A kind of minute-pressure direct-operated regulator |
| CN110578805A (en) * | 2018-06-08 | 2019-12-17 | 上海漕泾热电有限责任公司 | adjusting valve for high-pressure main steam bypass of waste heat boiler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205226501U (en) | Formula of relying on oneself relief pressure valve | |
| WO2007046104A3 (en) | Drip emitter with an independent non-drain valve | |
| ATE394726T1 (en) | PNEUMATIC PRESSURE REGULATOR VALVE | |
| ATE542565T1 (en) | PRESSURE MEASUREMENT INTERFACE FOR AN INJECTOR | |
| EP1890064A3 (en) | Pressure control valve | |
| WO2010096885A3 (en) | Air admittance valve | |
| CN105443483A (en) | Overflow valve | |
| CN102494166A (en) | Overflowing protective valve | |
| WO2010129826A3 (en) | Self-aligning axially constrained regulator valve assembly | |
| CN201982779U (en) | Diaphragm component of pulse electromagnetic valve | |
| CN218468340U (en) | Gas self-closing valve | |
| CN103629403A (en) | Multifunctional decompressor | |
| CN203082260U (en) | Novel membrane valve | |
| ATE477024T1 (en) | RELIEF VALVE DEVICE AND BREATHING APPARATUS HAVING SUCH A VALVE DEVICE | |
| CN104197026A (en) | Balancing floating combined structure of fuel gas pressure regulator | |
| CN102125706A (en) | Self reset pressure relief valve for hemodialysis | |
| CN207999529U (en) | A kind of pressure release water valve | |
| CN102818053B (en) | Voltage regulator and cut-off valve thereof | |
| CN202834239U (en) | Pressure-adjusting device and shut-off valve thereof | |
| CN203823224U (en) | Gas pressure stabilizing valve | |
| CN204140998U (en) | A kind of improvement valve | |
| CN205446834U (en) | Governing valve is with guide's formula binary channels air pressure controller | |
| CN203784429U (en) | Remote control valve | |
| CN202691178U (en) | Nuclear secondary lifting-type check valve | |
| CN210218772U (en) | Combined regulating relief ball valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |