CN203795554U - Water release mechanism, hydraulic cylinder structure with same and hydraulic drainage valve - Google Patents
Water release mechanism, hydraulic cylinder structure with same and hydraulic drainage valve Download PDFInfo
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- CN203795554U CN203795554U CN201420133018.4U CN201420133018U CN203795554U CN 203795554 U CN203795554 U CN 203795554U CN 201420133018 U CN201420133018 U CN 201420133018U CN 203795554 U CN203795554 U CN 203795554U
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- water
- seal
- discharge opening
- movable part
- water inlet
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 146
- 230000000694 effects Effects 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims description 13
- 238000010276 construction Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 241000283216 Phocidae Species 0.000 description 63
- 230000035945 sensitivity Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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Abstract
The utility model discloses a water release mechanism, a hydraulic cylinder structure with the same and a hydraulic drainage valve. The water release mechanism comprises a body and a movable component. The movable component is movably arranged on the body in a connected manner, the body is provided with a water inlet, a water outlet and a water release opening, the movable component can move between a first position and a second position under the effect of water pressure, the water release opening is closed by the movable component when the movable component is located at the first position, the water inlet is communicated with the water outlet when the movable component is located at the first position, and the water outlet is communicated with the water release opening when the movable component is located at the second position. The water release mechanism, the hydraulic cylinder structure and the hydraulic drainage valve have the advantages that the water release mechanism is simple in structure and high in reliability and drainage reliability, and stored water with pressure in a pipeline or a container can be quickly drained from the water release opening; the stored water in a hydraulic cylinder can be quickly drained when the water release mechanism is used in the hydraulic cylinder; a stable and reliable hydraulic drive effect of the drainage valve can be realized when the hydraulic cylinder with the water release mechanism is used in the hydraulic drainage valve, accordingly, the drainage flexibility can be greatly improved, and the water release mechanism, the hydraulic cylinder structure and the hydraulic drainage valve are applicable to realizing small-displacement drainage for water tanks with large sections.
Description
Technical field
The utility model relates to a kind of water gall mechanism and applies hydraulic cylinder structure and the hydraulic water discharge valve of this mechanism.
Background technology
During hydraulic-driven draining valve, by piston, substitute the device of conventional keys, during the water inlet of hydraulic cylinder intake antrum, pressure increases, piston actuated drainage mechanism carries out draining, when intake antrum stops into water, for guaranteeing the stable and draining sensitivity of draining valve, water storage in hydraulic cylinder intake antrum needs to discharge fast, makes piston fast reposition.Yet existing hydraulic-driven draining valve, its water gall mechanism cannot reliably and fast be realized and sluicing, and causes draining valve discharge capacity unstable, be subject to height influence of hydraulic pressure large, and draining sensitivity is low, and the water tank of heavy in section area cannot be realized small displacement draining.
Utility model content
The utility model provides a kind of water gall mechanism and has applied hydraulic cylinder structure and the hydraulic water discharge valve of this mechanism, and it has overcome the existing deficiency of background technology.
The utility model solves one of technical scheme that its technical problem adopts: a kind of water gall mechanism, it is characterized in that: it comprises body and the movable movable part that is installed in body, body is provided with water inlet (110), delivery port (120) and discharge opening (130), movable part is movable between primary importance and the second place under Water Pressure, when movable part is positioned at primary importance, movable part is closed discharge opening (130) and water inlet (110) and is connected with delivery port (120), and delivery port when movable part is positioned at the second place (120) is connected with discharge opening (130).
Among one preferred embodiment, described water inlet (110) is arranged with discharge opening (130) interval, and movable part arranged direction activity with discharge opening (130) along water inlet (110).
Among one preferred embodiment, described movable part is the sleeve (200) of an end opening, the opening of sleeve (200) and water inlet (110) are connected, the end wall (210) of sleeve (200) is provided with limbers (211), discharge opening (130) is arranged up and down with delivery port (120), when sleeve (200) is positioned at primary importance, the end wall (210) of sleeve sealing discharge opening (130) and water inlet (110) are connected by limbers (211) and delivery port (120), and when sleeve (200) is positioned at the second place, the end wall (210) of sleeve leaves discharge opening (130).
Among one preferred embodiment, described body is tubular, water inlet (110) is opened in one end of body, discharge opening (130) and delivery port (120) be opened in the other end of body and all with water inlet (110) positioned opposite, sleeve (200) sliding installation slides in body and along body length direction.
Among one preferred embodiment, described movable part comprises the first seal (320) matching with water inlet (110), when movable part is positioned at primary importance, the first seal (320) leaves water inlet (110), and during the second place, the first seal (320) is sealed into the mouth of a river (110).
Among one preferred embodiment, described movable part also comprises the second seal (330) matching with discharge opening (130), when movable part is positioned at primary importance the second seal (330) sealing discharge opening (130) and, when movable part is positioned at the second place, the second seal (330) leaves discharge opening (130).
Among one preferred embodiment, described movable part also comprises guide rod (310), and the first seal (320) and the second seal (330) are installed in respectively two ends of guide rod (310).
Among one preferred embodiment, described guide rod (310) is straight-bar structure or lever construction.
Among one preferred embodiment, the perisporium of described discharge opening (130) is made as guiding surface (131), described the second seal (330) be provided with can be sealed and matched mutually with guiding surface (131) coordinate inclined-plane (331).
Among one preferred embodiment, described body is also provided with intake tunnel (160) and relief hole (170), between the first seal (320) and body, form back pressure cavity (180), relief hole (170) is connected with back pressure cavity (180), and the first seal (320) offers for connecting the through flow hole (321) of intake tunnel (160) and back pressure cavity (180).
The utility model solves two of technical scheme that its technical problem adopts: a kind of hydraulic cylinder structure of applying above-mentioned water gall mechanism, it is characterized in that: comprise that cylinder body (20), activity are installed in piston (30) and the described water gall mechanism of cylinder body (20), piston (30) is divided into the first cavity (21) and the second cavity (22) by cylinder body (20) inside, and the delivery port of body (120) is connected with the first cavity (21) or the second cavity (22).
The utility model solves three of technical scheme that its technical problem adopts: a kind of hydraulic water discharge valve of applying above-mentioned hydraulic cylinder, it is characterized in that: comprise that the valve body (40), the activity that are provided with outfall (41) are installed in valve body (40) and can seal or open the start assembly of outfall (41) and be installed in the hydraulic cylinder structure of valve body (40), piston (30) start assembly that is in transmission connection.
The technical program is compared with background technology, and its tool has the following advantages:
1. when current enter after body, under Water Pressure, movable part moves to primary importance, now movable part sealing discharge opening and water inlet and delivery port are connected, water flows out and to enter in a wherein cavity of hydraulic cylinder from delivery port, and drives piston activity and carry out draining so that start assembly is opened outfall; When current stop, hydraulic pressure disappears, and movable part moves to the second place from primary importance, and delivery port and discharge opening are connected, and the water in hydraulic cylinder flows out into discharge opening from delivery port and from discharge opening, discharges.This water gall mechanism is simple in structure, and reliability is strong, can fast the water in hydraulic cylinder be discharged from discharge opening, and draining sensitivity improves, and is applicable to the situation that heavy in section water tank is realized small displacement draining.
2. movable part is sleeve, and seals discharge opening by end wall, and is connected by limbers and delivery port, simple in structure, compact, and highly sensitive with hydraulic pressure activity of sleeve.
3. movable part comprises guide rod and is installed in respectively the first seal and second seal of two ends of guide rod, the first seal coordinates with water inlet, the second seal coordinates with discharge opening, current break-make and sluicing process are combined closely, improve the sensitivity sluicing, drainage speed or sluicing speed are all accelerated.
4. body is also provided with intake tunnel and relief hole, between the first seal and body, forms back pressure cavity, and this back pressure cavity self hydraulic pressure utilize supplying water that is connected with relief hole makes the opening and closing of spilled water hole more reliable.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 has illustrated the perspective exploded view of a kind of water gall mechanism of the first preferred embodiment.
Fig. 2 has illustrated the cross-sectional schematic of a kind of water gall mechanism of the first preferred embodiment, adopts the movable part structure of the first.
Fig. 3 has illustrated the cross-sectional schematic of a kind of water gall mechanism of the first preferred embodiment, adopts the movable part structure of the second.
Fig. 4 has illustrated the cross-sectional schematic of a kind of water gall mechanism of the first preferred embodiment, adopts the third movable part structure.
Fig. 5 has illustrated the cross-sectional schematic of a kind of water gall mechanism of the first preferred embodiment, adopts the movable part structure of the 4th kind.
Fig. 6 has illustrated the cross-sectional schematic of a kind of hydraulic water discharge valve of the first preferred embodiment, is now water inlet state.
Fig. 7 has illustrated the cross-sectional schematic of a kind of hydraulic water discharge valve of the first preferred embodiment, is now sluicing state.
Fig. 8 has illustrated the cross-sectional schematic of the water gall mechanism of the second preferred embodiment, and now movable part is in primary importance.
Fig. 9 has illustrated the cross-sectional schematic of the water gall mechanism of the second preferred embodiment, and now movable part is in the second place.
Figure 10 has illustrated the cross-sectional schematic of the water gall mechanism of the 3rd preferred embodiment, and now movable part is in primary importance.
Figure 11 has illustrated the cross-sectional schematic of the water gall mechanism of the 3rd preferred embodiment, and now movable part is in the second place.
Figure 12 has illustrated the cross-sectional schematic of the water gall mechanism of the 4th preferred embodiment, and now movable part is in primary importance.
Figure 13 has illustrated the cross-sectional schematic of the water gall mechanism of the 4th preferred embodiment, and now movable part is in the second place.
Figure 14 has illustrated the cross-sectional schematic of a kind of water gall mechanism of the 5th preferred embodiment.
Figure 15 has illustrated the cross-sectional schematic of a kind of hydraulic water discharge valve of the 5th preferred embodiment, is now water inlet state.
Figure 16 has illustrated the cross-sectional schematic of a kind of hydraulic water discharge valve of the 5th preferred embodiment, is now sluicing state.
The specific embodiment
Please refer to Fig. 1 to Fig. 7, a kind of the first preferred embodiment of water gall mechanism, described a kind of water gall mechanism, it comprises body and the movable movable part that is installed in body.
Described body comprises that the first noumenon 140 and lid connect lid 150 compositions of the first noumenon 140.Described body is provided with water inlet 110, delivery port 120 and discharge opening 130.
Described movable part is movable between primary importance and the second place under Water Pressure, when movable part is positioned at primary importance, movable part is closed discharge opening 130 and water inlet 110 and is connected with delivery port 120, and when movable part is positioned at the second place, delivery port 120 is connected with discharge opening 130.
In the present embodiment, described water inlet 110 is arranged with discharge opening 130 intervals, and movable part arranged direction activity with discharge opening 130 along water inlet 110.In the present embodiment, water inlet 110 and discharge opening 130 positioned opposite.
In the present embodiment, described movable part comprises guide rod 310 and is installed in respectively the first seal 320 and second seal 330 of two ends of guide rod 310, guide rod 310 is straight-bar, one end of straight-bar passes water inlet 110 and the first seal 320 is positioned on water inlet 110, the other end of guide rod 310 passes discharge opening 130 and the second seal 330 is positioned at side under discharge opening 130, during primary importance, the second seal 330 sealing discharge openings 130 and the first seal 320 leave water inlet 110, during the second place, the first seal 320 is sealed into the mouth of a river 110 and the second seal 330 leaves discharge opening 130.
In the present embodiment, described body is also provided with intake tunnel 160, relief hole 170, between the first seal 320 and the first noumenon 140, lid 150, form back pressure cavity 180, described relief hole 170 is located on lid 150, this relief hole 170 is connected back pressure cavity 180 and body exterior, and described the first seal 320 is also provided with for connecting the through flow hole 321 of intake tunnel 160 and back pressure cavity 180, and this through flow hole 321 is simultaneously also through the first seal 320.
In the present embodiment, the first seal 320 comprises seal receptacle 340 and joint ring 322.
Its operating principle is: remain that water inlet switch is open mode, when controlling relief hole 170 unlatching, current enter back pressure cavity 180 through through flow hole 321, through relief hole 170, flow out again, pressure in back pressure cavity 180 is much smaller than intake tunnel 160 pressure, now the first seal 320 moves up, again because the suffered upwards hydraulic pressure area of the first seal 320 is greater than the suffered downward hydraulic pressure area of the second seal 330, therefore suffered the upwarding pressure of the first seal 320 is greater than the suffered downward pressure of the second seal 330, can guarantee that the first seal 320 moves and leave water inlet 110, the mobile movement that drives guide rod 310 due to the first seal 320, and then drive the second seal 330 to seal discharge openings 130, the water of intake tunnel flow to delivery port 120 and flows out body from delivery port 120 from water inlet 110, when control relief hole 170 is closed, current enter back pressure cavity 180 through through flow hole 321, back pressure cavity 180 is consistent with intake tunnel 160 hydraulic pressure, the hydraulic pressure area that the one side contacting with back pressure cavity 180 due to the first seal 320 is subject to is greater than the hydraulic pressure area that its one side contacting with intake tunnel 160 is subject to, therefore the pressure that the first seal 320 contacts with back pressure cavity 180 is greater than its pressure contacting with intake tunnel 160, now the first seal 320 moves and is sealed into the mouth of a river 110 under the poor effect of its two sides pressure, the mobile movement that drives guide rod 310 due to the first seal 320, and then drive the second seal 330 to move and open discharge opening 130, discharge opening 130 is connected with delivery port 120, the water that reversely flows into body from delivery port can be flowed out from discharge opening 130.
In the present embodiment, as shown in Figure 2, the perisporium of described discharge opening 130 is made as guiding surface 131, described the second seal 330 be provided with can be sealed and matched mutually with guiding surface 131 coordinate inclined-plane 331.And a sealing ring 332 is also preferably set on the second seal 330.
As shown in Figure 3, the difference of this structure and Fig. 2 is, the second seal 330 is not integrated with guide rod 310, but one be fixedly installed on the assembly on guide rod 310, and it can be by being fixed on guide rod 310 by clamping or bonding mode.And the second seal 330 preferably arranges a sealing ring 332.
As shown in Figure 4, the difference of this structure and Fig. 2 is, on the second seal 330, sealing ring is not set.
As shown in Figure 5, the difference of this structure and Fig. 2 is, the second seal 330 is made as a blocks, and one end and 130 laminatings of described discharge opening realize end face seal.Or also can one sealing ring be preferably set in end face seal place as required.
As shown in Figure 6 and Figure 7, for having applied a preferred embodiment of the hydraulic draining valve arrangement of hydraulic cylinder.
Described hydraulic water discharge valve, comprises that the valve body 40, the activity that are provided with outfall 41 are installed in valve body 40 and can seal or open the start assembly of outfall 41 and be installed in the hydraulic cylinder structure of valve body 40.
Hydraulic cylinder structure comprises that the cylinder body 20, the activity that are installed in valve body 40 are installed in the piston 30 of cylinder body 20 and described water gall mechanism, and piston 30 is divided into the first cavity 21 and the second cavity 22 by cylinder body 20 inside, and the delivery port 120 of body and the first cavity 21 are connected.As required, this delivery port 120 can be connected with the second cavity 22.Piston 30 start assembly that is in transmission connection.
Its operating principle is: remain that water inlet switch is open mode, open relief hole 170, the first seal leaves water inlet 110, the second seal 330 sealing discharge openings 130, the water of intake tunnel flow to delivery port 120 and flows out body from delivery port 120 from water inlet 110, then flows in the first cavity 21 of hydraulic cylinder, drive piston 30 to move down, piston 30 drives start assembly to open outfall, and draining valve is realized draining, as shown in Figure 6; Close relief hole 170, the first seal 320 is sealed into the mouth of a river 110, the second seal 330 is opened discharge opening 130, discharge opening 130 is connected with delivery port 120, pushes the water in the first cavity 21 in piston 30 reseting procedures, makes this water discharge the first cavity 21 and enter delivery port 120, from discharge opening 130, discharge again, sluice rapidly, piston 30 resets rapidly, as shown in Figure 7.
As shown in Figure 8 and Figure 9, be a kind of the second preferred embodiment of water gall mechanism.The difference of the present embodiment and the first embodiment is, described guide rod 310 is straight-bar, the first seal 320 is installed in one end of guide rod 310, the second seal 330 is one-body molded with guide rod 310, and guide rod 310 is also provided with the first via hole 311, when movable part is positioned at the second place, delivery port 120 is connected with discharge opening 130 by the first via hole 311.
As shown in Figure 10 and Figure 11, be a kind of the 3rd preferred embodiment of water gall mechanism.The difference of the present embodiment and the first embodiment is, described guide rod 310 is lever construction, one end of lever passes water inlet 110 and the first seal 320 is positioned at side outside water inlet 110, the first seal 320 is installed in one end of lever, the second seal 330 is installed in other one end of lever, and the second seal 330 is positioned at side within discharge opening 130, when movable part is positioned at the second place, delivery port 120 is connected with discharge opening 130.
As shown in Figure 12 and Figure 13, be a kind of the 4th preferred embodiment of water gall mechanism.The difference of the present embodiment and the first embodiment is, described guide rod 310 is lever construction, the first seal 320 is installed in one end of lever, the second seal 330 is one-body molded with lever, and lever is also provided with the second via hole 312, when movable part is positioned at the second place, delivery port 120 is connected with discharge opening 130 by the second via hole 312.
As shown in figure 14, be a kind of the 5th preferred embodiment of water gall mechanism.In the present embodiment, described movable part is the sleeve 200 of an end opening, the opening of sleeve 200 and water inlet 110 are connected, the end wall 210 of sleeve 200 is provided with limbers 211, discharge opening 130 is arranged up and down with delivery port 120, when sleeve 200 is positioned at primary importance, end wall 210 sealing discharge openings 130 and the water inlet 110 of sleeve is connected by limbers 211 and delivery port 120, and when sleeve 200 is positioned at the second place, the end wall 210 of sleeve leaves discharge opening 130.
In the present embodiment, described body is tubular, and water inlet 110 is opened in one end of body, discharge opening 130 and delivery port 120 be opened in the other end of body and all with water inlet 110 positioned opposite, sleeve 200 sliding installations slide in body and along body length direction.
As shown in Figure 15 and Figure 16, for adopting a preferred embodiment of the hydraulic water discharge valve of the water gall mechanism shown in Figure 14.In the present embodiment, by control valve 600, realize current break-make.
Its operating principle is: control valve 600 is opened current, water enters in body from water inlet 110, and move until end wall 210 sealing discharge openings 130 and the water inlet 110 of sleeve are connected by limbers 211 and delivery port 120 to delivery port direction at Water Pressure lower sleeve 200, water enters in the first cavity 21 of hydraulic cylinder from delivery port, piston 30 moves down and drives start assembly to open outfall under Water Pressure, realizes draining; Control valve 600 is closed current, piston 30 resets, in piston 30 reseting procedures, push the water in the first cavity 21, make this water discharge the first cavity 21 and enter delivery port 120, and sleeve 200 moves to water inlet direction under moment reverse water pressure effect, discharge opening 130 is opened, and the water of the first cavity 21 is discharged from discharge opening 130, realizes fast and sluicing.
The above, it is only the utility model preferred embodiment, therefore can not limit according to this scope that the utility model is implemented, the equivalence of doing according to the utility model the scope of the claims and description changes and modifies, and all should still belong in the scope that the utility model contains.
Claims (12)
1. a water gall mechanism, it is characterized in that: it comprises body and the movable movable part that is installed in body, body is provided with water inlet (110), delivery port (120) and discharge opening (130), movable part is movable between primary importance and the second place under Water Pressure, when movable part is positioned at primary importance, movable part is closed discharge opening (130) and water inlet (110) and is connected with delivery port (120), and delivery port when movable part is positioned at the second place (120) is connected with discharge opening (130).
2. a kind of water gall mechanism according to claim 1, is characterized in that: described water inlet (110) is arranged with discharge opening (130) interval, and movable part arranged direction activity with discharge opening (130) along water inlet (110).
3. a kind of water gall mechanism according to claim 1, it is characterized in that: described movable part is the sleeve (200) of an end opening, the opening of sleeve (200) and water inlet (110) are connected, the end wall (210) of sleeve (200) is provided with limbers (211), discharge opening (130) is arranged up and down with delivery port (120), when sleeve (200) is positioned at primary importance, the end wall (210) of sleeve sealing discharge opening (130) and water inlet (110) are connected by limbers (211) and delivery port (120), when sleeve (200) is positioned at the second place, the end wall (210) of sleeve leaves discharge opening (130).
4. a kind of water gall mechanism according to claim 3, it is characterized in that: described body is tubular, water inlet (110) is opened in one end of body, discharge opening (130) and delivery port (120) be opened in the other end of body and all with water inlet (110) positioned opposite, sleeve (200) sliding installation slides in body and along body length direction.
5. a kind of water gall mechanism according to claim 1, it is characterized in that: described movable part comprises the first seal (320) matching with water inlet (110), when movable part is positioned at primary importance, the first seal (320) leaves water inlet (110), and during the second place, the first seal (320) is sealed into the mouth of a river (110).
6. a kind of water gall mechanism according to claim 5, it is characterized in that: described movable part also comprises the second seal (330) matching with discharge opening (130), when movable part is positioned at primary importance the second seal (330) sealing discharge opening (130) and, when movable part is positioned at the second place, the second seal (330) leaves discharge opening (130).
7. a kind of water gall mechanism according to claim 6, is characterized in that: described movable part also comprises guide rod (310), and the first seal (320) and the second seal (330) are installed in respectively two ends of guide rod (310).
8. a kind of water gall mechanism according to claim 7, is characterized in that: described guide rod (310) is straight-bar structure or lever construction.
9. a kind of water gall mechanism according to claim 6, it is characterized in that: the perisporium of described discharge opening (130) is made as guiding surface (131), described the second seal (330) be provided with can be sealed and matched mutually with guiding surface (131) coordinate inclined-plane (331).
10. according to a kind of water gall mechanism described in claim 5 or 6 or 7 or 8 or 9, it is characterized in that: described body is also provided with intake tunnel (160) and relief hole (170), between the first seal (320) and body, form back pressure cavity (180), relief hole (170) is connected with back pressure cavity (180), and the first seal (320) offers for connecting the through flow hole (321) of intake tunnel (160) and back pressure cavity (180).
11. 1 kinds of application rights require the hydraulic cylinder structure of the water gall mechanism described in 1 to 10 any one, it is characterized in that: comprise that cylinder body (20), activity are installed in piston (30) and the described water gall mechanism of cylinder body (20), piston (30) is divided into the first cavity (21) and the second cavity (22) by cylinder body (20) inside, and the delivery port of body (120) is connected with the first cavity (21) or the second cavity (22).
12. an application rights requires the hydraulic water discharge valve of the hydraulic cylinder described in 11, it is characterized in that: comprise that the valve body (40), the activity that are provided with outfall (41) are installed in valve body (40) and can seal or open the start assembly of outfall (41) and be installed in the hydraulic cylinder structure of valve body (40), piston (30) start assembly that is in transmission connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420133018.4U CN203795554U (en) | 2014-03-21 | 2014-03-21 | Water release mechanism, hydraulic cylinder structure with same and hydraulic drainage valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420133018.4U CN203795554U (en) | 2014-03-21 | 2014-03-21 | Water release mechanism, hydraulic cylinder structure with same and hydraulic drainage valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203795554U true CN203795554U (en) | 2014-08-27 |
Family
ID=51377783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420133018.4U Expired - Lifetime CN203795554U (en) | 2014-03-21 | 2014-03-21 | Water release mechanism, hydraulic cylinder structure with same and hydraulic drainage valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203795554U (en) |
-
2014
- 2014-03-21 CN CN201420133018.4U patent/CN203795554U/en not_active Expired - Lifetime
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140827 |
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| CX01 | Expiry of patent term |