CN204985891U - Physiosis formula relief valve for life saving equipment - Google Patents
Physiosis formula relief valve for life saving equipment Download PDFInfo
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- CN204985891U CN204985891U CN201520777404.1U CN201520777404U CN204985891U CN 204985891 U CN204985891 U CN 204985891U CN 201520777404 U CN201520777404 U CN 201520777404U CN 204985891 U CN204985891 U CN 204985891U
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Abstract
The utility model discloses a physiosis formula relief valve for life saving equipment, the installation through -hole side end of its valve body are equipped with the step flaring, be equipped with in the installation through -hole with hole surface fixed junk ring support mutually, half part of above -mentioned junk ring support is extended and is got into to the part less relatively of step flaring, the case has included the lid part and has gone up perpendicular outside spliced pole part of extending from the lid part, lid part wherein is located the part less relatively of step flaring, and sealed lid connects on the corresponding port of junk ring support, and the three less some relatively of lid part, junk ring support and step flaring constitutes sealed chamber jointly, the juncture apical grafting of spring one end and junk ring support and installation through -hole, its other end then the apical grafting on the spring ring and make the case have the trend that the port of junk ring support was lived in downward shutoff. Its technical problem who has solved " the aeration quantity saturation that promotes physiosis formula life saving equipment " promotes physiosis formula life saving equipment's stability in use.
Description
Technical field
The utility model relates to a kind of safety valve, particularly a kind of air heave type life saving device safety valve.
Background technique
Existing large-scale cruise, steamer all prepare there is air heave type life saving device (such as life raft), use in order to emergent help.This air heave type life saving device folds up collection when not using, during use, inflation zip is pulled after taking-up, gas-filled pump in air heave type life saving device just can carry out fast aeration to air heave type life saving device, for ensureing enough aeration quantitys, the tolerance that general gas-filled pump can fill is slightly larger than the filled volume of air heave type life saving device, quick-fried for preventing air heave type life saving device from being filled, and just needs to arrange a safety valve on air heave type life saving device.The such as patent No. be 201320208056.7 authorize the life raft safety valve disclosing a kind of high stability in Chinese utility model patent document, this safety valve has certain cracking pressure, when the pressure in life raft is greater than the cracking pressure of safety valve, pressure release opened by safety valve, when pressure is less than the cracking pressure of safety valve, safety valve cuts out.
But the safety valve as said structure just has an obvious structural design defect, the seal spool in its structure be air pressure environment inside and outside air heave type life saving device.When the aeration quantity in air heave type life saving device is in saturated transition point, the spool in above-mentioned safety valve structure will carry out the switching of open and close action frequently, causes the aeration quantity in air heave type life saving device to be difficult to realization completely saturated.
Therefore, claimant thinks and is necessary to make further architecture advances to above-mentioned air heave type life saving device safety valve.
Model utility content
The purpose of this utility model provides a kind of air heave type life saving device safety valve that can promote the aeration quantity saturation ratio of air heave type life saving device to solve above-mentioned the deficiencies in the prior art.
To achieve these goals, a kind of air heave type life saving device safety valve designed by the utility model, comprise valve body, spool, spring backing ring and spring, valve body is wherein provided with installation through hole, wherein:
Described installation through hole one side end is provided with step enlarging, and in installation through hole, be provided with lining ring support, and be fixed on the bore area of installation through hole, the half of above-mentioned lining ring support extends partially into the relative small portion to step enlarging;
Described spool includes cap portion and vertical outward extending attachment post part cap portion, cap portion is wherein positioned at the relative small portion of step enlarging, and sealing cover is connected on the corresponding ports of lining ring support, and the relative small portion three of cap portion, lining ring support and step enlarging forms a Seal cage jointly, attachment post sections transverse wherein runs through lining ring support;
Described spring backing ring is positioned at installs through hole, and fix with the end face of attachment post part, the intersection apical grafting of described spring one end and lining ring support and installation through hole, its other end then apical grafting makes spool have the trend of the port blocking lining ring support downwards on spring backing ring;
When outer active force by spring backing ring overcome acting force of the spring promote spool time, the Seal cage that the relative small portion three of the cap portion of spool and lining ring support sealing configuration between the two and cap portion, lining ring support and step enlarging is formed jointly is all opened.
Above-mentioned middle provided a kind of air heave type life saving device safety valve, one side end of the installation through hole of valve body described in its structure is provided with step enlarging, described cap portion is positioned at the relative small portion of step enlarging, and sealing cover is connected on the corresponding ports of lining ring support, and the relative small portion three of cap portion, lining ring support and step enlarging forms a Seal cage jointly.Above-mentioned Seal cage is equivalent to a gas buffer chamber, when the safety valve of this structure specifically uses on air heave type life saving device, when the gas-filled pump on air heave type life saving device is unlocked, pressurized gas release realizes inflating air heave type life saving device, once the aeration quantity in air heave type life saving device is micro-higher than its saturated transition point, in safety valve structure, the sealing configuration of cap portion and lining ring support can be opened slightly, trace high pressure draught enters by cap portion, in the Seal cage that the relative small portion three of lining ring support and step enlarging is formed jointly, make a same formation hyperbaric environment in sealing chamber, but now above-mentioned hyperbaric environment can not with the atmosphere environment intercommunication outside air heave type life saving device, namely be equivalent to when the aeration quantity in air heave type life saving device is in saturation state, above-mentioned safety valve has a process of satiating, thus more effectively ensure that the aeration quantity in air heave type life saving device can be in a high saturation state, once the aeration quantity in air heave type life saving device far above its saturated transition point, the air pressure environment inside and outside air heave type life saving device just realizes through by safety valve, avoid thus air heave type life saving device because of aeration quantity excessive and damaged.
Simultaneously, we are by analyzing above-mentioned air heave type life saving device safety valve, can draw when the aeration quantity in air heave type life saving device is micro-higher than its saturated transition point, namely when the air pressure difference inside and outside air heave type life saving device is greater than spring reset force value, this air pressure overcomes spring reposition force by spring backing ring, and make spring produce further compressive deformation, synchronous promotion spool, the cap portion of spool and lining ring support sealing configuration between the two and cap portion, the Seal cage that the relative small portion three of lining ring support and step enlarging is formed jointly is all opened, the now sealing transition point of air heave type life saving device inner and outer air pressure is the cap portion and the lining ring support sealing configuration between the two that are positioned at spool, and the air pressure difference inside and outside air heave type life saving device is less than spring reset force value, in said structure, the spool of safety valve resets under the effect of spring reposition force, the sealing configuration of this cap portion and step enlarging on the Seal cage that now the sealing transition point of air heave type life saving device inner and outer air pressure then becomes is cap portion, the relative small portion three of lining ring support and step enlarging is formed jointly, as can be seen here, the safety valve of said structure is when opening and closing, and the lifting surface area S of the air pressure in air heave type life saving device can change, and considers that safety valve is when cutting out, air pressure in expanding life saving device acts directly in the whole single side surface of cap portion, i.e. S
close> S
open, contact pressure formula P=F/S, P is wherein pressure values, F is force value and S is lifting surface area, as can be seen here, when the spool of safety valve in said structure resets under the effect of spring reposition force, high pressure draught in air heave type life saving device acts in the whole single side surface of cap portion, but it is relatively little to the pressure action of the single side surface of cap portion, reduce cap portion and impact the plastic deformation amount that may cause because of high pressure draught, thus guarantee cap portion, the sealing of the Seal cage that the relative small portion three of lining ring support and step enlarging is formed jointly.
As a kind of technological improvement, the attachment post part of above-mentioned spool is socketed with seal ring and clamping pad, one side of wherein said seal ring and the cap portion of spool fit, the corresponding ports of its lip portion and lining ring support forms sealing configuration, one side end face of described clamping pad and seal ring are fitted, and its opposite side end face apical grafting to spring backing ring makes clamping pad have the trend of press seal circle.
In above-mentioned Technological improvement plan, the lining ring support on described spool and valve body is strictly sealed by the lip portion of seal ring between the two, ensure that the sealing stability at both sealing configuration places.
As further technological improvement, above-mentioned valve body includes the valve body of tubular structure, pressure cover and the interior also cap of raft, described installation through hole is positioned on valve body, the cylinder sidewall pressed on ring of its valve body is furnished with the step part in protruding structure, and the cylinder sidewall being positioned at these step part both sides is equipped with outside thread, the lid bottom part of described pressure cover is provided with through hole, the cover gab inwall of this pressure cover is provided with corresponding above-mentioned externally threaded internal thread, this pressure cover screw thread is screwed on above-mentioned valve body, be positioned at the side of step part, and be same direction with the step enlarging of installing on through hole, the interior also cap structure in the form of a ring of described raft, its ring inwall is provided with corresponding above-mentioned externally threaded internal thread, in this raft, also cap thread is screwed on above-mentioned valve body, and be positioned at the opposite side of step part, and the faying surface of raft interior also cap and valve body forms sealing configuration.
In above-mentioned further Technological improvement plan, described valve body structure can the overall installation on air heave type life saving device of convenient and safe valve.
A kind of technological selection, in above-mentioned raft and the sealing configuration that cap and the faying surface of valve body are formed refer to: the step part of described raft interior also cap and valve body is that the corrugated surface of continous way is fitted.
Consider that the safety valve of said structure is when air heave type life saving device is specifically installed, in raft in its structure, also cap is filled in air heave type life saving device by the installation through hole on air heave type life saving device in advance, then valve body is filled in again above-mentioned installation through hole, and by raft and cap thread be tightened on valve body, now the carcass of air heave type life saving device be clamped in above-mentioned raft and the step part of cap and valve body between the two, therefore by described raft and the faying surface of the step part of cap and valve body to design be the corrugated surface of continous way, both can being promoted by corrugated surface, faying surfaces is sealed with validity.
As further technological improvement, the limiting block that the end face pressed on ring of the cap portion of above-mentioned spool is furnished with the through hole avoiding seal spool to block on pressure cover connects block.
In above-mentioned further Technological improvement plan, the limiting block on the end face of described cap portion connects block and can effectively avoid occurring that seal spool blocks the situation of the through hole on pressure cover.
As further technological improvement, detachablely on the through hole of above-mentioned pressure cover be snapped with capping.
In above-mentioned further Technological improvement plan, described be sealed on arranged at safety valve when non-working condition or arranged at safety valve when non-normal use state, all can through hole on effective sealing pressure cover, block the pressure release path of safety valve.
As further technological improvement, the internal surface of above-mentioned capping is outward extended with apical grafting bar, and extends to the end face of spool always.
Arranged at safety valve in non-working condition time or arranged at safety valve in non-normal use state time, apical grafting bar on above-mentioned further capping described in Technological improvement plan internal surface can push up all the time and be pressed on spool, guarantee the cap portion of spool and lining ring support sealing configuration between the two and cap portion, Seal cage that the relative small portion three of lining ring support and step enlarging is formed jointly be sealed with validity.
A kind of air heave type life saving device safety valve that the utility model obtains, after it specifically uses on air heave type life saving device, when air heave type life saving device needs inflation to use, once gas-filled pump is unlocked, it can promote the aeration quantity saturation ratio of air heave type life saving device, effectively guarantee that air heave type life saving device uses under the saturated condition at most of height, promote its stability in use.
Accompanying drawing explanation
Fig. 1 be embodiment 1 a kind of cross-sectional configuration schematic diagram of air heave type life saving device safety valve is provided;
Fig. 2 be embodiment 2 a kind of cross-sectional configuration schematic diagram of air heave type life saving device safety valve is provided;
Fig. 3 be embodiment 3 a kind of cross-sectional configuration schematic diagram of air heave type life saving device safety valve is provided;
Fig. 4 be embodiment 4 a kind of cross-sectional configuration schematic diagram of air heave type life saving device safety valve is provided;
Fig. 5 be embodiment 5 a kind of cross-sectional configuration schematic diagram of air heave type life saving device safety valve is provided;
Fig. 6 be embodiment 6 a kind of cross-sectional configuration schematic diagram of air heave type life saving device safety valve is provided.
In figure: in valve body 1, spool 2, cap portion 2-1, attachment post part 2-2, spring backing ring 3, spring 4, installation through hole 5, step enlarging 6, relative small portion 6-1, lining ring support 7, Seal cage 8, seal ring 9, clamping pad 10, lip portion 11, valve body 12, pressure cover 13, raft, also cap 14, step part 15, through hole 16, corrugated surface 17, carcass 18, limiting block connect block 19, capping 20, apical grafting bar 21.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Embodiment 1:
As shown in Figure 1, a kind of air heave type life saving device safety valve provided in the present embodiment, comprises valve body 1, spool 2, spring backing ring 3 and spring 4, and valve body 1 is wherein provided with installs through hole 5, wherein:
Described installation through hole 5 one side end is provided with step enlarging 6, and in installation through hole 5, be provided with lining ring support 7, and be fixed on the bore area of installation through hole 5, the half of above-mentioned lining ring support 7 extends partially into the relative small portion 6-1 to step enlarging 6;
Described spool 2 includes cap portion 2-1 and vertical outward extending attachment post part 2-2 from cap portion 2-1, cap portion 2-1 is wherein positioned at the relative small portion 6-1 of step enlarging 6, and sealing cover is connected on the corresponding ports of lining ring support 7, and cap portion 2-1, lining ring support 7 form a Seal cage 8 jointly with the relative small portion 6-1 three of step enlarging 6, attachment post part 2-2 wherein vertically runs through lining ring support 7;
Described spring backing ring 3 is positioned at installs through hole 5, and fix with the end face of attachment post part 2-2, the intersection apical grafting of described spring 4 one end and lining ring support 7 and installation through hole 5, its other end then apical grafting makes spool 2 have the trend of the port blocking lining ring support 7 downwards on spring backing ring 3;
When outer active force by spring backing ring 3 overcome spring 4 active force promote spool 2 time, the Seal cage 8 that the relative small portion 6-1 three of the lid of spool 2 and lining ring support 7 sealing configuration between the two and cap portion 2-1, lining ring support 7 and step enlarging 6 is formed jointly is all opened.
Embodiment 2:
A kind of air heave type life saving device safety valve provided in the present embodiment, its general structure is consistent with embodiment 1, as shown in Figure 2, but the attachment post part 2-2 of spool 2 described in the present embodiment is socketed with seal ring 9 and clamping pad 10, one side of wherein said seal ring 9 and the cap portion 2-1 of spool 2 fit, its lip portion 11 forms sealing configuration with the corresponding ports of lining ring support 7, one side end face and the seal ring 9 of described clamping pad 10 are fitted, its opposite side end face apical grafting to spring backing ring 3 make clamping pad 10 have the trend of press seal circle 9.
Spool 2 in said structure is strictly sealed by the lip portion 11 of seal ring between the two with the lining ring support 7 on valve body 1, ensure that the sealing stability at both sealing configuration places.
Embodiment 3:
A kind of air heave type life saving device safety valve provided in the present embodiment, its general structure is consistent with embodiment 2, as shown in Figure 3, but the valve body described in the present embodiment 1 includes the valve body 12 of tubular structure, pressure cover 13 and the interior also cap 14 of raft, described installation through hole 5 is positioned on valve body 12, the cylinder sidewall pressed on ring of its valve body 12 is furnished with the step part 15 in protruding structure, and the cylinder sidewall being positioned at these step part 15 both sides is equipped with outside thread, the lid bottom part of described pressure cover 13 is provided with through hole 16, the cover gab inwall of this pressure cover 13 is provided with corresponding above-mentioned externally threaded internal thread, this pressure cover 13 screw thread is screwed on above-mentioned valve body 12, be positioned at the side of step part 15, and be same direction with the step enlarging 6 of installing on through hole 5, interior also cap 14 structure in the form of a ring of described raft, its ring inwall is provided with corresponding above-mentioned externally threaded internal thread, in this raft, also cap 14 screw thread is screwed on above-mentioned valve body 12, and be positioned at the opposite side of step part 15, and the interior also cap 14 of raft forms sealing configuration with the faying surface of valve body 12.
The sealing configuration that in raft described in the present embodiment, also cap 14 and the faying surface of both valve bodies 12 are formed refers to: in described raft, also cap 14 is fitted with the corrugated surface 17 that both step parts 15 of valve body 12 are continous way.
Above-mentioned valve body structure can the overall installation on air heave type life saving device of convenient and safe valve.The safety valve of said structure is when air heave type life saving device is specifically installed simultaneously, in raft in its structure, also cap 14 is filled in air heave type life saving device by the installation through hole 5 on air heave type life saving device in advance, then valve body 12 is filled in above-mentioned installation through hole 5 again, and by raft and cap 14 screw thread be tightened on valve body 12, now the carcass 18 of air heave type life saving device be clamped in above-mentioned raft and the step part 15 of cap 14 and valve body 12 between the two, therefore by described raft, also cap 14 and the faying surface of both step parts 15 of valve body 12 design the corrugated surface 17 in continous way, both can being promoted by corrugated surface 17, faying surfaces is sealed with validity.
Embodiment 4:
A kind of air heave type life saving device safety valve provided in the present embodiment, its general structure is consistent with embodiment 3, as shown in Figure 4, the limiting block that the end face pressed on ring of the cap portion 2-1 of spool 2 described in the present embodiment is furnished with the through hole 16 avoiding spool 2 sealing blocking to live on pressure cover 13 connects block 19.
Limiting block on the end face of above-mentioned cap portion 2-1 connects block 19 and can effectively avoid occurring that spool 2 sealing blocking lives the situation of the through hole 16 on pressure cover 13.
Embodiment 5:
A kind of air heave type life saving device safety valve provided in the present embodiment, its general structure is consistent with embodiment 4, as shown in Figure 5, but detachablely on the through hole 16 stating pressure cover 13 described in the present embodiment is snapped with capping 20.
Above-mentioned capping 20 arranged at safety valve in non-working condition time or arranged at safety valve in non-normal use state time, all can through hole 16 on effective sealing pressure cover 13, block the pressure release path of safety valve.
Embodiment 6:
A kind of air heave type life saving device safety valve provided in the present embodiment, its general structure is consistent with embodiment 5, as shown in Figure 6, but the internal surface of capping 20 described in the present embodiment is outward extended with apical grafting bar 21, and extends to the end face of spool 2 always.
Arranged at safety valve in non-working condition time or arranged at safety valve in non-normal use state time, apical grafting bar 21 on above-mentioned capping 20 internal surface can push up all the time and be pressed on spool 2, guarantee the lid of spool 2 and lining ring support 7 sealing configuration between the two and cap portion 2-1, Seal cage 8 that lining ring support 7 is formed jointly with the relative small portion 6-1 three of step enlarging 6 be sealed with validity.
Claims (10)
1. an air heave type life saving device safety valve, comprises valve body (1), spool (2), spring backing ring (3) and spring (4), and valve body (1) is wherein provided with installs through hole (5), it is characterized in that:
Described installation through hole (5) side end is provided with step enlarging (6), lining ring support (7) is provided with in installation through hole (5), and be fixed on the bore area of installation through hole (5), the half of above-mentioned lining ring support (7) extends partially into the relative small portion (6-1) to step enlarging (6);
Described spool (2) includes cap portion (2-1) and vertical outward extending attachment post part (2-2) cap portion (2-1), cap portion (2-1) is wherein positioned at the relative small portion (6-1) of step enlarging (6), and sealing cover is connected on the corresponding ports of lining ring support (7), and cap portion (2-1), lining ring support (7) form a Seal cage (8) jointly with relative small portion (6-1) three of step enlarging (6), attachment post part (2-2) wherein vertically runs through lining ring support (7);
Described spring backing ring (3) is positioned at installs through hole (5), and fix with the end face of attachment post part (2-2), described spring (4) one end and lining ring support (7) and the intersection apical grafting of through hole (5) is installed, its other end then apical grafting is upper and make spool (2) have the trend of the port blocking lining ring support (7) downwards at spring backing ring (3);
When outer active force by spring backing ring (3) overcome spring (4) active force promote spool (2) time, the Seal cage (8) that the cap portion (2-1) of spool (2) and lining ring support (7) sealing configuration between the two and cap portion (2-1), lining ring support (7) are formed jointly with relative small portion (6-1) three of step enlarging (6) is all opened.
2. a kind of air heave type life saving device safety valve according to claim 1, the attachment post part (2-2) that it is characterized in that above-mentioned spool (2) is socketed with seal ring (9) and clamping pad (10), one side of wherein said seal ring (9) and the cap portion (2-1) of spool (2) fit, its lip portion (11) forms sealing configuration with the corresponding ports of lining ring support (7), one side end face and the seal ring (9) of described clamping pad (10) are fitted, its opposite side end face apical grafting above makes clamping pad (10) have the trend of press seal circle (9) to spring backing ring (3).
3. a kind of air heave type life saving device safety valve according to claim 1 and 2, it is characterized in that above-mentioned valve body (1) includes the valve body (12) of tubular structure, pressure cover (13) and the interior also cap (14) of raft, described installation through hole (5) is positioned on valve body (12), the cylinder sidewall pressed on ring of its valve body (12) is furnished with the step part (15) in protruding structure, and the cylinder sidewall being positioned at this step part (15) both sides is equipped with outside thread, the lid bottom part of described pressure cover (13) is provided with through hole (16), the cover gab inwall of this pressure cover (13) is provided with corresponding above-mentioned externally threaded internal thread, this pressure cover (13) screw thread is screwed on above-mentioned valve body (12), be positioned at the side of step part (15), and be same direction with the step enlarging (6) of installing on through hole (5), interior also cap (14) structure in the form of a ring of described raft, its ring inwall is provided with corresponding above-mentioned externally threaded internal thread, in this raft, also cap (14) screw thread is screwed on above-mentioned valve body (12), and be positioned at the opposite side of step part (15), and the interior also cap (14) of raft forms sealing configuration with the faying surface of valve body (12).
4. a kind of air heave type life saving device safety valve according to claim 3, is characterized in that the sealing configuration that in above-mentioned raft, also cap (14) and valve body (12) both faying surfaces are formed refers to: in described raft, also cap (14) is fitted with both step parts (15) corrugated surfaces (17) in continous way of valve body (12).
5. a kind of air heave type life saving device safety valve according to claim 3, is characterized in that the limiting block that the end face pressed on ring of the cap portion (2-1) of above-mentioned spool (2) is furnished with the through hole (16) avoiding spool (2) sealing blocking to live on pressure cover (13) connects block (19).
6. a kind of air heave type life saving device safety valve according to claim 4, is characterized in that the limiting block that the end face pressed on ring of the cap portion (2-1) of above-mentioned spool (2) is furnished with the through hole (16) avoiding spool (2) sealing blocking to live on pressure cover (13) connects block (19).
7. a kind of air heave type life saving device safety valve according to claim 3, is characterized in that the through hole (16) of above-mentioned pressure cover (13) is above detachable and is snapped with capping (20).
8. a kind of air heave type life saving device safety valve according to claim 4, is characterized in that the through hole (16) of above-mentioned pressure cover (13) is above detachable and is snapped with capping (20).
9. a kind of air heave type life saving device safety valve according to claim 5, is characterized in that the through hole (16) of above-mentioned pressure cover (13) is above detachable and is snapped with capping (20).
10. a kind of air heave type life saving device safety valve according to claim 9, the internal surface that it is characterized in that above-mentioned capping (20) is outward extended with apical grafting bar (21), and extends to the end face of spool (2) always.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520777404.1U CN204985891U (en) | 2015-10-09 | 2015-10-09 | Physiosis formula relief valve for life saving equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520777404.1U CN204985891U (en) | 2015-10-09 | 2015-10-09 | Physiosis formula relief valve for life saving equipment |
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| CN204985891U true CN204985891U (en) | 2016-01-20 |
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ID=55120259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520777404.1U Active CN204985891U (en) | 2015-10-09 | 2015-10-09 | Physiosis formula relief valve for life saving equipment |
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| CN (1) | CN204985891U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202234A (en) * | 2015-10-09 | 2015-12-30 | 宁波市鄞州液压机械有限公司 | Safety valve for air-expanding lifesaving device |
| CN106015715A (en) * | 2016-07-25 | 2016-10-12 | 金华市宏昌电器有限公司 | Hydraulic control device |
-
2015
- 2015-10-09 CN CN201520777404.1U patent/CN204985891U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202234A (en) * | 2015-10-09 | 2015-12-30 | 宁波市鄞州液压机械有限公司 | Safety valve for air-expanding lifesaving device |
| CN105202234B (en) * | 2015-10-09 | 2020-01-21 | 宁波市鄞州液压机械有限公司 | Safety valve for inflatable life-saving device |
| CN106015715A (en) * | 2016-07-25 | 2016-10-12 | 金华市宏昌电器有限公司 | Hydraulic control device |
| CN106015715B (en) * | 2016-07-25 | 2018-07-17 | 金华市宏昌电器有限公司 | A kind of Waterpower control device |
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