CN210480726U - Slow oil return device for jack - Google Patents
Slow oil return device for jack Download PDFInfo
- Publication number
- CN210480726U CN210480726U CN201920892383.6U CN201920892383U CN210480726U CN 210480726 U CN210480726 U CN 210480726U CN 201920892383 U CN201920892383 U CN 201920892383U CN 210480726 U CN210480726 U CN 210480726U
- Authority
- CN
- China
- Prior art keywords
- oil return
- blocking
- jack
- piece
- sliding hole
- 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
Images
Landscapes
- Lift Valve (AREA)
Abstract
The utility model discloses a slow oil return device for a jack, which comprises a built-in valve and an adjusting valve rod; the built-in valve includes the valve body, the elastic component, first stifled plug member and second stifled plug member, wherein, the valve body is installed between first oil return passageway and second oil return passageway, the valve body has the water conservancy diversion passageway, the entry and the first oil return passageway intercommunication of water conservancy diversion passageway, the export and the second oil return passageway intercommunication of water conservancy diversion passageway, first plug member is established at the entry of water conservancy diversion passageway and is used for blockking up first oil return passageway, the one end of elastic component is fixed in the water conservancy diversion passageway, the other end and first plug member fixed connection, the elastic component is used for contradicting first stifled plug member and blocks up first oil return passageway, the export of water conservancy diversion passageway is established at the water conservancy diversion passageway and is used for blockking up the intercommunication of water conservancy diversion passageway and second oil return passageway to the second plug member, adjusting valve rod establishes on. The utility model discloses simple structure guarantees can slow pressure release when the load pressure release, increases its security.
Description
Technical Field
The utility model relates to a technical field of jack especially relates to a slow oil return device for jack.
Background
With the rapid development of the automobile industry at home and abroad, the automobile parts industry is continuously and rapidly increased, and with the continuous improvement of the technical level, the development speed of the hydraulic hoisting equipment is very high. Light hydraulic equipment (horizontal jacks) in the hydraulic system gradually develop towards the trends of multiple varieties, multiple specifications, multiple functions and the like from the original vertical series.
The existing jack can rapidly return oil under the load state due to the self gravity of the load in the oil return process, the load is bumped and vibrated in the process, certain influence is caused on the load, and certain safety problems exist in the oil return process of the jack.
SUMMERY OF THE UTILITY MODEL
For the technical problem who exists among the solution background art, the utility model provides a slow oil return device for jack.
The utility model provides a slow oil return device for a jack, which comprises a built-in valve and an adjusting valve rod;
the jack is provided with a first oil return channel and a second oil return channel, and an included angle formed between the first oil return channel and the second oil return channel is not 0 degree;
the built-in valve includes the valve body, the elastic component, first stifled plug member and second stifled plug member, wherein, the valve body is installed between first oil return passageway and second oil return passageway, the valve body has the water conservancy diversion passageway, the entry and the first oil return passageway intercommunication of water conservancy diversion passageway, the export and the second oil return passageway intercommunication of water conservancy diversion passageway, first plug member is established at the entry of water conservancy diversion passageway and is used for blockking up first oil return passageway, the one end of elastic component is fixed in the water conservancy diversion passageway, the other end and first plug member fixed connection, the elastic component is used for contradicting first stifled plug member and blocks up first oil return passageway, the export of water conservancy diversion passageway is established at the water conservancy diversion passageway and is used for blockking up the intercommunication of water conservancy diversion passageway and second oil return passageway to the second plug member, adjusting valve rod establishes on.
As the utility model discloses the scheme of further optimization, the water conservancy diversion passageway has first slip hole, the elastic component mounting hole, spacing hole of elastic component and second slip hole in proper order from the entry end to the exit end, first slip hole, the elastic component mounting hole, spacing hole of elastic component and second slip hole communicate in proper order, the part of the spacing jogged joint of elastic component mounting hole and elastic component forms the installation face, the one end of elastic component is fixed on the installation face, first jam slidable mounting is in first slip hole, the second jam is installed in the second slip hole.
As the utility model discloses the scheme of further optimizing, the coupling part of first sliding hole and elastic component mounting hole forms spacing face, and the position that first jam piece removed is injectd to spacing face.
As the utility model discloses the scheme of further optimization, it has the opening to open on the valve body, and the opening is used for communicateing second slip hole and second oil return passage.
As a further preferred aspect of the present invention, the bottom surface of the opening is higher than the bottom surface of the first sliding hole.
As the utility model discloses the scheme of further optimization, the cross-section of second sliding hole and first oil return passageway is circular, and first jam piece and second jam piece are the steel ball, and the diameter of first jam piece is greater than the diameter of first oil return passageway, and the diameter of second jam piece is greater than the diameter of second sliding hole.
As a further preferred aspect of the present invention, the first plug diameter is larger than the second plug diameter.
As the utility model discloses the scheme of further optimizing, adjusting valve rod include coupling part and adjustment part, adjustment part and coupling part fixed connection, and coupling part passes through the screw thread mode with the jack and is connected, and coupling part's bottom is contradicted with second jam piece, and adjustment part's end extends jack portion.
As the utility model discloses further optimized scheme, it has the annular to open on the regulation part, is equipped with the sealing washer in the annular.
As a further preferred aspect of the present invention, the elastic member is a spring.
As the utility model discloses the scheme of further optimization, when first stopper seals first oil return passageway, the elastic component is in compression state.
The utility model discloses in, the slow oil return device for jack that provides, when the pressure release, adjust the adjusting valve pole and make second plug open the water conservancy diversion passageway, and then make the export and the second oil return passageway intercommunication of water conservancy diversion passageway, make the first plug member of hydraulic oil extrusion under the effect of hydraulic pressure oil pressure, first plug member extrusion elastic component, and then first plug member slowly opens first oil return passageway, first oil return passageway slowly and second oil return passageway intercommunication in the time, and then guarantee also can slow oil return when the load, and then avoid the jack to descend fast, improve its security performance.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the valve body structure of the present invention;
fig. 3 is a top view of the valve body of the present invention;
fig. 4 is the structure schematic diagram of the adjusting valve rod of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar designations denote like or similar elements or elements having like or similar functionality throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The slow oil return device for the jack as shown in fig. 1-4 comprises a built-in valve and an adjusting valve rod 1;
the jack is provided with a first oil return passage 2 and a second oil return passage 3, and an included angle formed between the first oil return passage 2 and the second oil return passage 3 is not 0 degree;
the built-in valve comprises a valve body 4, an elastic piece 5, a first blocking piece 6 and a second blocking piece 7, wherein the valve body 4 is installed between a first oil return channel 2 and a second oil return channel 3, the valve body 4 is provided with a flow guide channel, an inlet of the flow guide channel is communicated with the first oil return channel 2, an outlet of the flow guide channel is communicated with the second oil return channel 3, the first blocking piece 6 is arranged at the inlet of the flow guide channel and used for blocking the first oil return channel 2, one end of the elastic piece 5 is fixed in the flow guide channel, the other end of the elastic piece is fixedly connected with the first blocking piece 6, the elastic piece 5 is used for abutting against the first blocking piece 6 to block the first oil return channel 2, the second blocking piece 7 is arranged at the outlet of the flow guide channel and used for blocking the communication between the flow guide channel and the second oil return channel 3, and the adjusting valve rod 1 is arranged on a jack and used.
When an oil inlet or a jack is in a supporting state, the bottom of the adjusting valve rod 1 is adjusted to abut against the second plugging member 7 to seal the flow guide channel, so that the first oil return channel 2 is not communicated with the second oil return channel 3; at the in-process of pressure release, adjust adjusting valve rod 1 and make second jam piece 7 open the water conservancy diversion passageway, and then make the export and the 3 intercommunications of second oil return passageway of water conservancy diversion passageway, make first jam piece 6 of hydraulic oil extrusion under the effect of hydraulic pressure oil pressure. First jam piece 6 extrusion elastic component 5, and then first jam piece 6 slowly opens first oil return passageway 2, and first oil return passageway 2 slowly communicates with second oil return passageway 3 during, and then guarantees also can slowly return oil when load, and then avoids the jack to descend fast, improves its security performance.
In some embodiments, it is preferable that when the first blocking member 6 seals the first oil return passage 2, the elastic member 5 is in a compressed state, so as to further increase the interference force of the elastic member 5 on the first blocking member 6, so that the first blocking member 6 can slowly leave the first oil return passage 2 when the pressure is released.
In some embodiments, it is preferable that the flow guide channel has a first sliding hole 40, an elastic member mounting hole 41, an elastic member limiting hole 42 and a second sliding hole 43 in sequence from the inlet end to the outlet end, the first sliding hole 40, the elastic member mounting hole 41, the elastic member limiting hole 42 and the second sliding hole 43 are in sequence communicated, a connecting portion of the elastic member mounting hole 41 and the elastic member limiting hole 42 forms a mounting surface 44, one end of the elastic member 5 is fixed on the mounting surface 44, the first blocking member 6 is slidably mounted in the first sliding hole 40, the second blocking member 7 is mounted in the second sliding hole 43, and the second blocking member 7 blocks the elastic member limiting hole 42 to seal the flow guide channel.
In some embodiments, it is preferable that the connecting portion 10 of the first sliding hole 40 and the elastic member mounting hole 41 form a limiting surface 45, and the limiting surface 45 limits the position of the first blocking member 6 to move, so as to limit the displacement of the first blocking member 6 moving obliquely upward under the pressure of the hydraulic oil in the first oil return passage 2, thereby ensuring that the elastic member deforms within a certain range, and avoiding damage caused by excessive deformation; simultaneously also realize certain guide effect to first jam piece 6, make it when screwing up adjusting valve rod 1, adjusting valve rod 1 contradicts second jam piece 7 and makes second jam piece 7 block up the water outlet end of water conservancy diversion passageway (blockking up spacing hole 7 of elastic component promptly), because the displacement of first jam piece 6 is less relatively can accurate resume the normal position and block up first oil return passageway 2.
In some embodiments, it is preferable that the valve body 4 is provided with an opening 46, the opening 46 is used for communicating the second sliding hole 43 with the second oil return passage 3, when the second blocking member 7 is displaced for a certain distance in the adjusting valve rod 1, the second oil return passage 3 can be communicated with the flow guide passage, and the second sliding hole 43 can limit and guide the second blocking member 7.
In some embodiments, it is preferable that the bottom surface of the opening 46 is higher than the bottom surface of the first sliding hole 40, and the second blocking member 7 ensures the sealing property when blocking the elastic member stopper hole 42.
In some embodiments, it is preferable that the cross sections of the second sliding hole 43 and the first oil return passage 2 are both circular, the first blocking member 6 and the second blocking member 7 are both steel balls, the diameter of the first blocking member 6 is greater than that of the first oil return passage 2, and the diameter of the second blocking member 7 is greater than that of the second sliding hole 43, so as to ensure that the first blocking member 6 and the second blocking member 7 seal the elastic member limiting hole 42 of the first oil return passage 2 or the flow guide passage, and even if the first blocking member 6 and the second blocking member 7 deflect to some extent, the first blocking member 6 and the second blocking member 7 automatically return to the right when contacting the first oil return passage 2 or the elastic member limiting hole 42, thereby ensuring the sealing performance of each time and prolonging the service life of the first oil return passage; and when second jam piece 7 is the steel ball, second jam piece 7 can not link firmly with adjusting valve rod, it establish in second sliding hole 43 can, when not releasing pressure, adjusting valve rod 1's bottom is contradicted second jam piece 7 and is made its spacing hole 42 of sealed regulating part, and when releasing pressure, adjusting valve rod 1 upwards moves certain distance, and second jam piece 7 leaves second sliding hole 43 and realizes switching on of water conservancy diversion passageway and second oil return passageway 3 under the impact of hydraulic oil.
In some embodiments, it is preferable that the adjustment valve stem 1 includes a connection portion 10 and an adjustment portion 11, the adjustment portion 11 is fixedly connected to the connection portion 10, the connection portion 10 is connected to the jack in a threaded manner, a bottom of the connection portion 10 interferes with the second blocking member 7, and a distal end of the adjustment portion 11 extends out of the jack portion. By rotating the adjusting part 11, the connecting part 10 rotates and moves relative to the jack, so that the second blocking part 7 moves in the second sliding hole 40, the elastic part limiting hole 42 is sealed and opened, and the flow guide channel and the second oil return channel 3 are communicated and closed.
In some embodiments, in order to increase the sealing performance of the adjusting valve rod, the adjusting part 11 is provided with a ring groove 110, and a sealing ring 8 is arranged in the ring groove 110.
Specifically, the elastic member 5 is a spring, and has a simple structure and a low price.
Example one
The slow oil return device for the jack as shown in fig. 1-4 comprises a built-in valve and an adjusting valve rod 1;
the jack is provided with a first oil return passage 2 and a second oil return passage 3, and an included angle formed between the first oil return passage 2 and the second oil return passage 3 is not 0 degree;
the built-in valve comprises a valve body 4, a spring 5, a first plugging member 6 and a second plugging member 7, wherein the first plugging member 6 and the second plugging member 7 are both steel balls, the valve body 4 is installed between a first oil return channel 2 and a second oil return channel 3, a jack is provided with a first mounting hole 13 and a second mounting hole 14, the first mounting hole 13 and the second mounting hole 14 are coaxial and communicated, the valve body 4 is fixed in a certain mounting hole 13 in a threaded mode, a gasket 9 is arranged between the valve body 4 and the bottom of the first mounting hole 13, the valve body 4 is provided with a flow guide channel, the inlet of the flow guide channel is communicated with the first oil return channel 2, the outlet of the flow guide channel is communicated with the second oil return channel 3, the first plugging member 6 is arranged at the inlet of the flow guide channel and used for plugging the first oil return channel 2, one end of an elastic member 5 is fixed in the flow guide channel, and the other end of the elastic member is, the elastic piece 5 is used for abutting against the first blocking piece 6 to block the first oil return channel 2, the second blocking piece 7 is arranged at the outlet of the flow guide channel and used for blocking the communication between the flow guide channel and the second oil return channel 3, and the adjusting valve rod 1 is installed in the second installation hole 14 in a threaded mode and used for adjusting the sealing or opening between the second blocking piece 7 and the flow guide channel;
the flow guide channel is sequentially provided with a first sliding hole 40, an elastic piece mounting hole 41, an elastic piece limiting hole 42 and a second sliding hole 43 from the inlet end to the outlet end, the first sliding hole 40, the elastic piece mounting hole 41, the elastic piece limiting hole 42 and the second sliding hole 43 are sequentially communicated, a connecting part of the elastic piece mounting hole 41 and the elastic piece limiting hole 42 forms a mounting surface 44, one end of an elastic piece 5 is fixed on the mounting surface 44, a first blocking piece 6 is slidably mounted in the first sliding hole 40, and a second blocking piece 7 is mounted in the second sliding hole 43; the connecting portion 10 of the first slide hole 40 and the elastic member mounting hole 41 forms a stopper face 45, the stopper face 45 defining a position where the first blocking member 6 moves; the valve body 4 is provided with an opening 46, and the opening 46 is used for communicating the second sliding hole 43 with the second oil return channel 3; the bottom surface of the opening 46 is higher than the bottom surface of the first slide hole 40;
the cross sections of the second sliding hole 43 and the first oil return channel 2 are both circular, the first blocking piece 6 and the second blocking piece 7 are both steel balls, the diameter of the first blocking piece 6 is larger than that of the first oil return channel 2, and the diameter of the second blocking piece 7 is larger than that of the second sliding hole 43; the diameter of the first obstruction piece 6 is larger than that of the second obstruction piece 7;
the adjusting valve rod 1 comprises a connecting part 10 and an adjusting part 11, the adjusting part 11 is fixedly connected with the connecting part 10, the connecting part 10 is connected with the jack in a threaded mode, the bottom of the connecting part 10 is abutted against the second plugging part 7, and the tail end of the adjusting part 11 extends out of the jack part; the adjusting part 11 is provided with a ring groove 110, and a sealing ring 8 is arranged in the ring groove 110.
In the working process of the embodiment, when an oil inlet or a jack is in a supporting state, the bottom of the adjusting valve rod 1 is adjusted to abut against the second plugging member 7 so as to seal the elastic member limiting hole 42 of the flow guide channel, and further the first oil return channel 2 is not communicated with the second oil return channel 3; in the process of pressure release, adjust adjusting valve rod 1 and make second jam piece 7 open the spacing hole of elasticity 42 of water conservancy diversion passageway, and then make the opening 46 and the 3 intercommunication of second oil return passageway of water conservancy diversion passageway, make the first jam piece 6 of hydraulic oil extrusion under the effect of hydraulic pressure oil pressure, first jam piece 6 extrusion elastic component 5, and then first jam piece 6 slowly opens first oil return passageway 2, and then realize the first oil return passageway 2 slowly and the 3 intercommunication of second oil return passageway, and then guarantee also can slowly return oil when the load, and then avoid the jack to descend fast, improve its security performance.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (10)
1. A slow oil return device for a jack is characterized by comprising a built-in valve and an adjusting valve rod (1);
the jack is provided with a first oil return channel (2) and a second oil return channel (3), and an included angle formed between the first oil return channel (2) and the second oil return channel (3) is not 0 degree;
the built-in valve comprises a valve body (4), an elastic piece (5), a first blocking piece (6) and a second blocking piece (7), wherein the valve body (4) is installed between a first oil return channel (2) and a second oil return channel (3), the valve body (4) is provided with a flow guide channel, an inlet of the flow guide channel is communicated with the first oil return channel (2), an outlet of the flow guide channel is communicated with the second oil return channel (3), the first blocking piece (6) is arranged at the inlet of the flow guide channel and used for blocking the first oil return channel (2), one end of the elastic piece (5) is fixed in the flow guide channel, the other end of the elastic piece is fixedly connected with the first blocking piece (6), the elastic piece (5) is used for abutting against the first blocking piece (6) to block the first oil return channel (2), the second blocking piece (7) is arranged at the outlet of the flow guide channel and used for blocking the communication between the flow guide channel and the second oil, the adjusting valve rod (1) is arranged on the jack and is used for adjusting the sealing or opening of the second plugging piece (7) and the flow guide channel.
2. The slow oil return device for the jack according to claim 1, wherein the flow guide passage is provided with a first sliding hole (40), an elastic member mounting hole (41), an elastic member limiting hole (42) and a second sliding hole (43) in sequence from the inlet end to the outlet end, the first sliding hole (40), the elastic member mounting hole (41), the elastic member limiting hole (42) and the second sliding hole (43) are communicated in sequence, the connection part of the elastic member mounting hole (41) and the elastic member limiting hole (42) forms a mounting surface (44), one end of the elastic member (5) is fixed on the mounting surface (44), the first blocking member (6) is slidably mounted in the first sliding hole (40), and the second blocking member (7) is mounted in the second sliding hole (43).
3. The slow oil return device for a jack according to claim 2, wherein the connection portion (10) of the first sliding hole (40) and the elastic member mounting hole (41) forms a stopper surface (45), and the stopper surface (45) defines a position where the first blocking member (6) moves.
4. The slow oil return device for a jack according to claim 2, wherein the valve body (4) is provided with an opening (46), and the opening (46) is used for communicating the second sliding hole (43) with the second oil return passage (3).
5. The slow oil return device for a jack according to claim 4, wherein the bottom surface of the opening (46) is higher than the bottom surface of the first sliding hole (40).
6. The slow oil return device for a jack according to claim 2, wherein the cross sections of the second sliding hole (43) and the first oil return passage (2) are both circular, the first blocking member (6) and the second blocking member (7) are both steel balls, the diameter of the first blocking member (6) is larger than that of the first oil return passage (2), and the diameter of the second blocking member (7) is larger than that of the second sliding hole (43).
7. The slow oil return device for the jack according to claim 1, wherein the adjusting valve rod (1) comprises a connecting part (10) and an adjusting part (11), the adjusting part (11) is fixedly connected with the connecting part (10), the connecting part (10) is connected with the jack in a threaded mode, the bottom of the connecting part (10) is abutted against the second blocking part (7), and the tail end of the adjusting part (11) extends out of the jack part.
8. The slow oil return device for a jack according to claim 7, wherein the adjusting portion (11) is provided with a ring groove (110), and the ring groove (110) is provided with the sealing ring (8).
9. A slow oil return device for jacks according to claim 1, wherein the elastic member (5) is a spring.
10. A slow oil return device for a jack according to claim 1, wherein the resilient member (5) is in a compressed state when the first obturating member (6) seals the first oil return passage (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920892383.6U CN210480726U (en) | 2019-06-12 | 2019-06-12 | Slow oil return device for jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920892383.6U CN210480726U (en) | 2019-06-12 | 2019-06-12 | Slow oil return device for jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210480726U true CN210480726U (en) | 2020-05-08 |
Family
ID=70514338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920892383.6U Active CN210480726U (en) | 2019-06-12 | 2019-06-12 | Slow oil return device for jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210480726U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110255422A (en) * | 2019-06-12 | 2019-09-20 | 安徽通润汽车零部件有限公司 | A kind of oil return apparatus at a slow speed for jack |
-
2019
- 2019-06-12 CN CN201920892383.6U patent/CN210480726U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110255422A (en) * | 2019-06-12 | 2019-09-20 | 安徽通润汽车零部件有限公司 | A kind of oil return apparatus at a slow speed for jack |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101893010B (en) | Hydraulic balanced valve | |
| CN210480726U (en) | Slow oil return device for jack | |
| CN203374967U (en) | Remote control overflow valve | |
| CN103291983B (en) | Safety valve and hydraulic support with same | |
| CN104500796B (en) | Pressure regulating valve | |
| CN109185488B (en) | High-pressure sealing gate valve | |
| CN101539025A (en) | High flow safety valve | |
| CN202348228U (en) | Elastic-sheet type pressure release valve | |
| CN110748518B (en) | Excavator load keeps valve | |
| CN114109307B (en) | Erosion-resistant normally-open type internal blowout prevention valve | |
| CN218971855U (en) | Gate valve with impact resistance | |
| CN106870815B (en) | Balance type direct-acting water attack relief valve | |
| CN207331856U (en) | A kind of non-negative pressure stabilized compensator | |
| CN112815123B (en) | Ultra-low temperature bellows pilot operated safety valve | |
| CN102418497A (en) | Spring sheet type pressure release valve | |
| CN201714748U (en) | Safety valve for multi-way valve | |
| CN210318756U (en) | Pilot-operated pressure relief valve | |
| CN104692279A (en) | Oil returning structure | |
| CN115325188A (en) | Double-safety intelligent safety valve | |
| CN210566485U (en) | Pilot operated safety valve | |
| CN210950065U (en) | High-pressure bypass differential pressure valve | |
| CN110015604B (en) | Locking device of multi-rope lifting suspension device | |
| CN208417731U (en) | A kind of piston type adjustable pressure regulator | |
| CN205908548U (en) | Prevent superpressure relief pressure valve | |
| CN211039829U (en) | Safety valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |