CN210566584U - Automatic degassing float valve with safety overflow function - Google Patents
Automatic degassing float valve with safety overflow function Download PDFInfo
- Publication number
- CN210566584U CN210566584U CN201921396183.8U CN201921396183U CN210566584U CN 210566584 U CN210566584 U CN 210566584U CN 201921396183 U CN201921396183 U CN 201921396183U CN 210566584 U CN210566584 U CN 210566584U
- Authority
- CN
- China
- Prior art keywords
- valve
- safety
- core body
- hole
- automatic degassing
- 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
- Safety Valves (AREA)
Abstract
The utility model discloses an automatic degassing float valve with safety overflow function, which comprises an automatic degassing float valve, wherein a discharge flange is arranged on an upper connecting flange of a valve core body of the automatic degassing float valve, an exhaust cavity and an oil discharge cavity which are mutually isolated are arranged in the discharge flange, a valve hole of a valve seat is communicated with a first end of the exhaust cavity, and a vent pipe communicated with the outside is arranged at a second end of the exhaust cavity; the oil drain valve further comprises a safety valve arranged on the valve core body, an inlet of the safety valve is communicated with the inside of the floating barrel, an outlet of the safety valve is communicated with the first end of the oil drain cavity, and an oil drain pipe communicated with the outside is arranged at the second end of the oil drain cavity. The utility model has the advantages that: prevent the blowout of fluid, reduced the space that the installation took.
Description
Technical Field
The utility model relates to an exhaust, oil extraction valve field, concretely relates to automatic degasification float valve with safe overflow function.
Background
In the prior art, as disclosed in the utility model with application number CN200920172572.2, an automatic degassing float valve includes a valve core body, a needle valve, a float bucket and a float ball, wherein the valve core body is axially provided with a four-step through hole, the upper part of the valve core body is provided with an upper connecting flange, the lower part of the valve core body is provided with a lower connecting flange, a valve seat is arranged in the first and second two-step through holes on the upper part of the valve core body, and the valve seat is provided with a valve hole matched with the needle valve; the lower connecting flange of the valve core body is connected with the floating barrel, the floating ball is positioned in the floating barrel, the top of the floating ball is connected with the lower part of the valve cap through threads, the valve cap is axially provided with a through hole, the upper part of the valve cap is positioned in a fourth step through hole of the valve core body, the lower part of the third step through hole of the valve core body is provided with a valve cap lead sleeve, the middle lower part of the needle valve is movably matched and positioned in the valve cap lead sleeve, the needle head part of the needle valve extends out of the upper end of the valve cap lead sleeve and corresponds to a valve hole of the valve seat; the lower part of the valve cap lead sleeve is movably matched with the through hole on the upper part of the valve cap; the syringe needle of needle valve is the circular cone face with the valve opening fitting surface of disk seat, the disk seat lower part is the face of cylinder with the cooperation locating surface of case body, automatic degasification float valve is arranged in having the marine heating fuel oil system of pressure on the container, in the use, automatic degasification float valve cooperates the use with the relief valve together, all install on marine heating fuel oil system in the container, and the two is installed alone, occupation space is more, under the unstable condition of system pressure, transient pressure fluctuation often has in the container, lead to the frequent jump of relief valve on the system container, fluid in the container is spout from the relief valve, bring fuel pollution and the intensity of labour when having increaseed the loss of fuel and operating personnel and cleaning for the system.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: in the prior art, the problem of oil liquid ejection caused by frequent take-off of a safety valve during transient pressure fluctuation in a vessel of a marine heating fuel system and the problem of space occupation caused by independent installation of an automatic degassing float valve and the safety valve.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is: an automatic degassing float valve with a safety overflow function comprises an automatic degassing float valve, wherein the automatic degassing float valve comprises a valve core body, a needle valve, a floating barrel and a floating ball, the valve core body is axially provided with four-stage step through holes, the upper part of the valve core body is provided with an upper connecting flange, the lower part of the valve core body is provided with a lower connecting flange, a valve seat is arranged in a first two-stage step through hole and a second two-stage step through hole in the upper part of the valve core body, and the valve seat is provided; the lower connecting flange of the valve core body is connected with the floating barrel, the floating ball is positioned in the floating barrel, the top of the floating ball is connected with the lower part of the valve cap through threads, the valve cap is axially provided with a through hole, the upper part of the valve cap is positioned in a fourth step through hole of the valve core body, the lower part of the third step through hole of the valve core body is provided with a valve cap lead sleeve, the middle lower part of the needle valve is movably matched and positioned in the valve cap lead sleeve, the needle head part of the needle valve extends out of the upper end of the valve cap lead sleeve and corresponds to a valve hole of the valve seat; the lower part of the valve cap lead sleeve is movably matched with the through hole on the upper part of the valve cap; the matching surface of a needle head of the needle valve and a valve hole of a valve seat is a conical surface, the matching positioning surface of the lower part of the valve seat and a valve core body is a cylindrical surface, a discharge flange is arranged on an upper connecting flange of the valve core body, an exhaust cavity and an oil discharge cavity which are mutually isolated are arranged in the discharge flange, the valve hole of the valve seat is communicated with a first end of the exhaust cavity, and an exhaust pipe communicated with the outside is arranged at a second end of the exhaust cavity;
the oil drain valve further comprises a safety valve arranged on the valve core body, an inlet of the safety valve is communicated with the inside of the floating barrel, an outlet of the safety valve is communicated with the first end of the oil drain cavity, and an oil drain pipe communicated with the outside is arranged at the second end of the oil drain cavity.
The utility model provides an automatic degasification float valve with safe overflow function, to discharge the flange, the relief valve is integrated to on the automatic degasification float valve, only need during practical application with its integral erection on the fuel container can, for installing it alone with the relief valve, the installation procedure has been reduced, intensity of labour is lower, and occupation space is also still less, when on the ship diesel engine load sudden change or other reasons lead to pressure instantaneous fluctuation in the container, the relief valve overflow is compeled to instantaneous pressure, high-pressure fluid overflows from the relief valve and gets into in the oil extraction cavity, then discharge from the oil extraction pipe, the injection of fluid has been avoided, can not bring fuel pollution for the system, the fuel loss has been reduced, intensity of labour when having reduced operating personnel and cleaning.
Preferably, a sealing element is arranged between the upper connecting flange and the discharge flange of the valve core body. The upper connecting flange of the valve core body and the discharge flange are sealed, so that leakage and fuel pollution can be prevented in the oil discharge and exhaust processes.
Preferably, the sealing element is a sealing ring or a sealant. The sealing ring or the sealant has good sealing effect, is easy to obtain, and is convenient to install and replace.
Preferably, the upper connecting flange of the valve core body is connected with the discharge flange through bolts and nuts.
Preferably, a safety valve mounting hole is formed in the valve core body, a first end of the safety valve mounting hole is communicated with the inside of the floating barrel, and a second end of the safety valve mounting hole is communicated with a first end of the oil drainage cavity;
the safety valve comprises an oil inlet piece which is hermetically arranged at the first end of the safety valve mounting hole, and oil inlet channels which are respectively communicated with the inside of the floating barrel and the inside of the safety valve mounting hole are arranged on the oil inlet piece;
the safety valve is characterized by further comprising a support arranged at the second end of the safety valve mounting hole, a guide rod penetrating through the support is arranged in the support in a sliding mode, the first end of the guide rod is located between the oil inlet piece and the support, an elastic piece is sleeved on the guide rod, two ends of the elastic piece are respectively abutted between the support and the first end of the guide rod, and the first end of the guide rod is abutted in an outlet of the oil inlet channel and sealed with the outlet of the oil inlet channel under the action of the elastic piece.
When instantaneous pressure fluctuation is generated in the floating barrel, oil enters the oil inlet channel and jacks up the guide rod, then the oil flows into the oil discharge cavity from a gap between the guide rod and the support and is discharged through the oil discharge pipe, the purpose of pressure relief is achieved, and oil is prevented from being sprayed.
Preferably, the oil inlet part is a plug screw, and the plug screw and the valve core body are sealed. The screw plug has simple structure and convenient installation.
Preferably, the support is provided with external threads and screwed in the safety valve mounting hole.
Preferably, the elastic member is made of a spring or elastic rubber. The spring or the elastic rubber has good elasticity, is easy to obtain and is reliable to reset.
Preferably, the first end of the guide rod is a ball head, and a conical surface or a spherical surface which is in sealing fit with the ball head is arranged at the outlet of the oil inlet channel. The ball head and the guide rod are integrated, so that the jumping and resetting are stable and reliable, and the matching sealing effect of the ball head and the conical surface or the spherical surface is better.
Preferably, a ball blocking part is arranged between the first end of the guide rod and the oil inlet part, and a conical surface or a spherical surface which is in sealing fit with the ball blocking part is arranged at the outlet of the oil inlet channel. The blocking ball and the guide rod are arranged separately, so that the structure of the blocking ball and the guide rod is simplified, the blocking ball and the guide rod are easy to process, and the matching sealing effect of the blocking ball and the conical surface or the spherical surface is better.
The beneficial effects of the utility model reside in that:
1. the utility model provides an automatic degasification float valve with safe overflow function, to discharge the flange, the relief valve is integrated to on the automatic degasification float valve, only need during practical application with its integral erection on the fuel container can, for installing it alone with the relief valve, the installation procedure has been reduced, intensity of labour is lower, and occupation space is also still less, when on the ship diesel engine load sudden change or other reasons lead to pressure instantaneous fluctuation in the container, the relief valve overflow is compeled to instantaneous pressure, high-pressure fluid overflows from the relief valve and gets into in the oil extraction cavity, then discharge from the oil extraction pipe, the injection of fluid has been avoided, can not bring fuel pollution for the system, the fuel loss has been reduced, intensity of labour when having reduced operating personnel and cleaning.
2. The upper connecting flange of the valve core body and the discharge flange are sealed, so that leakage and fuel pollution can be prevented in the oil discharge and exhaust processes.
3. The sealing ring or the sealant has good sealing effect, is easy to obtain, and is convenient to install and replace.
4. When instantaneous pressure fluctuation is generated in the floating barrel, oil enters the oil inlet channel and jacks up the guide rod, then the oil flows into the oil discharge cavity from a gap between the guide rod and the support and is discharged through the oil discharge pipe, the purpose of pressure relief is achieved, and oil is prevented from being sprayed.
5. The screw plug has simple structure and convenient installation.
6. The spring or the elastic rubber has good elasticity, is easy to obtain and is reliable to reset.
7. The ball head and the guide rod are integrated, so that the jumping and resetting are stable and reliable, and the matching sealing effect of the ball head and the conical surface or the spherical surface is better.
8. The blocking ball and the guide rod are arranged separately, so that the structure of the blocking ball and the guide rod is simplified, the blocking ball and the guide rod are easy to process, and the matching sealing effect of the blocking ball and the conical surface or the spherical surface is better.
Drawings
FIG. 1 is a schematic diagram of an automatic degassing float valve with a safety overflow function according to an embodiment of the present invention;
FIG. 2 is a schematic view of a guide bar according to a second embodiment of the present invention;
wherein the content of the first and second substances,
the automatic degassing float valve-1, the valve core body-11, the floating barrel-12, the floating ball-13, the valve cap-14, the needle valve-15, the valve seat-16, the hold-down bolt-17, the positioning pin-18, the locking nut-19, the valve cap lead sleeve-110 and the safety valve mounting hole-111;
a discharge flange-2, an exhaust cavity-21, an oil discharge cavity-22, an exhaust pipe-211 and an oil discharge pipe-221;
the device comprises a safety valve-3, an oil inlet piece-31, a support seat-32, a guide rod-33, an elastic piece-34, a ball blocking-35 and an oil inlet channel-311.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In the description of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The first embodiment is as follows:
as shown in fig. 1, an automatic degassing float valve with a safety overflow function comprises an automatic degassing float valve 1, wherein the automatic degassing float valve 1 comprises a valve core body 11, a needle valve 15, a floating barrel 12 and a floating ball 13, the valve core body 11 is axially provided with four-stage step through holes, the upper part of the valve core body is provided with an upper connecting flange, the lower part of the valve core body is provided with a lower connecting flange, a valve seat 16 is arranged in a first two-stage step through hole and a second two-stage step through hole which are arranged on the upper part of the valve core body 11, the valve seat 16 is inserted into the valve core body 11 from the upper part, a compression bolt 17 is screwed into the valve core body 11 and is tightly pressed on the valve seat 16, a locking nut 19; the lower connecting flange of the valve core body 11 is connected with the floating barrel 12, the floating ball 13 is positioned in the floating barrel 12, at least three positioning pins 18 are radially arranged in the middle of the inner side of the floating barrel 12, in the embodiment, four positioning pins 18 are arranged and are respectively positioned in the front-rear, left-right directions to limit the swing of the ball body of the floating ball 13, the top of the floating ball 13 is connected with the lower part of the valve cap 14 through threads, the valve cap 14 is axially provided with a through hole, the upper part of the valve cap 14 is positioned in a fourth step through hole of the valve core body 11, the lower part of the third step through hole of the valve core body 11 is provided with a valve cap lead sleeve 110, the middle lower part of the needle valve 15 is movably matched and positioned in the valve cap lead sleeve 110, the needle head part of the needle valve 15 extends out; the lower part of the bonnet lead sleeve 110 is movably matched in a through hole on the upper part of the bonnet 14; the matching surface of the needle head of the needle valve 15 and the valve hole of the valve seat 16 is a conical surface, and the matching positioning surface of the lower part of the valve seat 16 and the valve core body 11 is a cylindrical surface.
When the container is filled with liquid continuously, gas overflows from small holes in a valve seat 16, when buoyancy generated by the floating ball 13 is larger than the self weight, the floating ball 13 moves upwards, when the floating ball 13 moves upwards, the floating ball 13 is limited by a positioning pin 18 on the floating barrel 12 and a valve cap 14 at the top of the floating ball 13 in a lead way so as not to generate large swing, and the floating ball moves a section of way to abut against the needle valve 15 and drive the needle valve 15 to move upwards until the needle valve 15 is in contact with and sealed with the valve seat 16, so that the gas stops being discharged. When the gas on the upper part of the floating ball 13 is increased, the liquid level is continuously reduced by the air pressure, when the buoyancy is smaller than the self weight of the floating ball 13, the floating ball 13 starts to move downwards, after the floating ball moves for a section, the self weight of the floating ball 13 overcomes the buoyancy and the internal and external pressure difference, the needle valve 15 is driven to move downwards, the needle valve 15 leaves the valve seat 16, and the gas overflows from a small hole on the valve seat 16. The above process is repeated continuously, and the function of automatically discharging the gas in the system is achieved.
As shown in fig. 1, a discharge flange 2 is arranged on an upper connecting flange of the valve core body 11, a sealing member is arranged between the upper connecting flange of the valve core body 11 and the discharge flange 2, the sealing member is a sealing ring or sealant, and the upper connecting flange of the valve core body 11 is connected with the discharge flange 2 through bolts and nuts.
The exhaust flange 2 is provided with an exhaust cavity 21 and an oil discharge cavity 22 which are isolated from each other, a valve hole of the valve seat 16 is opened to a first end of the exhaust cavity 21, and a second end of the exhaust cavity 21 is provided with an exhaust pipe 211 opened to the outside.
The oil drain valve further comprises a safety valve 3 arranged on the valve core body 11, an inlet of the safety valve 3 leads to the inside of the floating barrel 12, an outlet of the safety valve 3 leads to a first end of the oil drain cavity 22, and a second end of the oil drain cavity 22 is provided with an oil drain pipe 221 leading to the outside.
A safety valve mounting hole 111 is formed in the valve core body 11, a first end of the safety valve mounting hole 111 leads to the inside of the floating barrel 12, and a second end of the safety valve mounting hole 111 leads to a first end of the oil discharge cavity 22; the safety valve 3 comprises an oil inlet piece 31 which is hermetically installed at the first end of the safety valve installation hole 111, the oil inlet piece 31 is provided with oil inlet channels 311 which respectively lead to the inside of the floating barrel 12 and the inside of the safety valve installation hole 111, the oil inlet piece 31 is a screw plug, and the screw plug and the valve core body 11 are sealed.
The safety valve is characterized by further comprising a support 32 installed at the second end of the safety valve installation hole 111, the support 32 is provided with external threads, the support 32 is screwed in the safety valve installation hole 111, a guide rod 33 penetrating through the support 32 is arranged in the support 32 in a sliding mode, the first end of the guide rod 33 is located between the oil inlet piece 31 and the support 32, an elastic piece 34 is sleeved on the guide rod 33, two ends of the elastic piece 34 are respectively abutted between the support 32 and the first end of the guide rod 33, the first end of the guide rod 33 is abutted in the outlet of the oil inlet channel 311 and sealed with the outlet of the oil inlet channel 311 under the action of the elastic piece 34, and the elastic piece 34 is made of a spring or elastic.
A blocking ball 35 is arranged between the first end of the guide rod 33 and the oil inlet piece 31, and a conical surface or a spherical surface which is in sealing fit with the blocking ball 35 is arranged at the outlet of the oil inlet channel 311.
Example two:
the difference between this embodiment and the first embodiment is:
as shown in fig. 2, the first end of the guide rod 33 is provided with a ball head, and the outlet of the oil inlet passage 311 is provided with a conical surface or a spherical surface which is in sealing fit with the ball head.
The working principle is as follows:
as shown in figure 1, the automatic degassing float valve with the safety overflow function in the utility model integrates the discharge flange 2 and the safety valve 3 on the automatic degassing float valve 1, and only needs to be integrally installed on a fuel container in practical application, thus reducing the installation steps, lowering the labor intensity and occupying less space compared with the case of independently installing the discharge flange and the safety valve, when the pressure in the vessel fluctuates instantaneously due to sudden load changes of the diesel engine on the ship or other reasons, the instantaneous pressure forces oil into the oil inlet passage 311, and the guide rod 33 is jacked up, then, the fuel oil flows into the oil discharge cavity 22 from the gap between the guide rod 33 and the support 32 and is discharged through the oil discharge pipe 221, so that the purpose of pressure relief is achieved, the oil injection is prevented, the fuel oil pollution to the system is avoided, the fuel oil loss is reduced, and the labor intensity of cleaning operators is reduced.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An automatic degassing float valve with a safety overflow function comprises an automatic degassing float valve (1), wherein the automatic degassing float valve (1) comprises a valve core body (11), a needle valve (15), a floating barrel (12) and a floating ball (13), the valve core body (11) is axially provided with four-stage step through holes, the upper part of the valve core body is provided with an upper connecting flange, the lower part of the valve core body is provided with a lower connecting flange, a valve seat (16) is arranged in a first two-stage step through hole and a second two-stage step through hole in the upper part of the valve core body (11), and the valve seat (16) is provided with a valve hole; the lower connecting flange of the valve core body (11) is connected with the floating barrel (12), the floating ball (13) is located in the floating barrel (12), the top of the floating ball (13) is connected with the lower part of the valve cap (14) through threads, the axial direction of the valve cap (14) is a through hole, the upper part of the valve cap (14) is located in a fourth-stage step through hole of the valve core body (11), a valve cap lead sleeve (110) is arranged on the lower part of the third-stage step through hole of the valve core body (11), the middle lower part of the needle valve (15) is movably matched and located in the valve cap lead sleeve (110), the needle head part of the needle valve (15) extends out of the upper end of the valve cap lead sleeve (110) and corresponds to a valve hole of the valve seat (16), and the needle head; the lower part of the bonnet lead sleeve (110) is movably matched in a through hole at the upper part of the bonnet (14); the valve hole fitting surface of the syringe needle of needle valve (15) and disk seat (16) is the circular conical surface, and the cooperation locating surface of disk seat (16) lower part and case body (11) is the face of cylinder, its characterized in that:
a discharge flange (2) is arranged on an upper connecting flange of the valve core body (11), an exhaust cavity (21) and an oil discharge cavity (22) which are mutually isolated are arranged in the discharge flange (2), a valve hole of the valve seat (16) leads to a first end of the exhaust cavity (21), and a second end of the exhaust cavity (21) is provided with an exhaust pipe (211) leading to the outside;
the oil drain valve is characterized by further comprising a safety valve (3) arranged on the valve core body (11), an inlet of the safety valve (3) leads to the inside of the floating barrel (12), an outlet of the safety valve (3) leads to the first end of the oil drain cavity (22), and an oil drain pipe (221) leading to the outside is arranged at the second end of the oil drain cavity (22).
2. The automatic degassing float valve with safety overflow function according to claim 1, characterized in that: and a sealing element is arranged between the upper connecting flange of the valve core body (11) and the discharge flange (2).
3. The automatic degassing float valve with safety overflow function according to claim 2, characterized in that: the sealing element is a sealing ring or a sealant.
4. The automatic degassing float valve with safety overflow function according to claim 1, characterized in that: the upper connecting flange of the valve core body (11) is connected with the discharge flange (2) through bolts and nuts.
5. The automatic degassing float valve with safety overflow function according to claim 1, characterized in that: a safety valve mounting hole (111) is formed in the valve core body (11), a first end of the safety valve mounting hole (111) leads to the inside of the floating barrel (12), and a second end of the safety valve mounting hole (111) leads to a first end of the oil discharge cavity (22);
the safety valve (3) comprises an oil inlet piece (31) which is hermetically arranged at the first end of the safety valve mounting hole (111), and the oil inlet piece (31) is provided with oil inlet channels (311) which are respectively communicated with the inside of the floating barrel (12) and the inside of the safety valve mounting hole (111);
the safety valve is characterized by further comprising a support (32) installed at the second end of the safety valve installation hole (111), a guide rod (33) penetrating through the support (32) is arranged in the support (32) in a sliding mode, the first end of the guide rod (33) is located between the oil inlet piece (31) and the support (32), an elastic piece (34) is sleeved on the guide rod (33), two ends of the elastic piece (34) are respectively propped between the support (32) and the first end of the guide rod (33), and under the action of the elastic piece (34), the first end of the guide rod (33) is propped in an outlet of the oil inlet channel (311) and is sealed with the outlet of the oil inlet channel (311).
6. The automatic degassing float valve with safety overflow function of claim 5, characterized in that: the oil inlet piece (31) is a plug screw, and the plug screw and the valve core body (11) are sealed.
7. The automatic degassing float valve with safety overflow function of claim 5, characterized in that: the support (32) is provided with external threads, and the support (32) is screwed in the safety valve mounting hole (111).
8. The automatic degassing float valve with safety overflow function of claim 5, characterized in that: the elastic piece (34) adopts a spring or elastic rubber.
9. An automatic degassing float valve with safety overflow function according to any one of claims 5-8, characterized in that: the first end of the guide rod (33) is provided with a ball head, and the outlet of the oil inlet channel (311) is provided with a conical surface or a spherical surface which is in sealing fit with the ball head.
10. An automatic degassing float valve with safety overflow function according to any one of claims 5-8, characterized in that: a blocking ball (35) is arranged between the first end of the guide rod (33) and the oil inlet piece (31), and a conical surface or a spherical surface which is in sealing fit with the blocking ball (35) is arranged at the outlet of the oil inlet channel (311).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921396183.8U CN210566584U (en) | 2019-08-26 | 2019-08-26 | Automatic degassing float valve with safety overflow function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921396183.8U CN210566584U (en) | 2019-08-26 | 2019-08-26 | Automatic degassing float valve with safety overflow function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210566584U true CN210566584U (en) | 2020-05-19 |
Family
ID=70628226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921396183.8U Active CN210566584U (en) | 2019-08-26 | 2019-08-26 | Automatic degassing float valve with safety overflow function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210566584U (en) |
-
2019
- 2019-08-26 CN CN201921396183.8U patent/CN210566584U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108414286B (en) | Oil sampling device in oil tank | |
| RU2391592C1 (en) | Check valve | |
| CN210566584U (en) | Automatic degassing float valve with safety overflow function | |
| CN108590861A (en) | A kind of Fuel Bleed Valve | |
| US10883337B2 (en) | Drain-back valve and method | |
| CN108223869B (en) | Marine high-pressure air back pressure valve | |
| CN212272515U (en) | Oil well pump and valve structure | |
| CN210978666U (en) | Pressure relief device in bottle neck valve | |
| RU2313025C1 (en) | Vent valve of flying vehicle fuel tank | |
| CN212272514U (en) | Oil well pump and valve structure | |
| CN210715345U (en) | Threaded cartridge type one-way unloading overflow valve | |
| RU2473830C1 (en) | Plunger pump valve | |
| CN208073623U (en) | A kind of Fuel Bleed Valve | |
| CN202001404U (en) | Hydraulic power accumulator of engineering machinery | |
| CN101832260B (en) | Spurt-prevention filling valve of defueling pump | |
| CN111425379A (en) | Oil well pump and valve structure | |
| CN110594464A (en) | Pressure relief device in bottleneck valve | |
| CN218716642U (en) | Hollow sucker rod annular well-flushing valve | |
| CN218439718U (en) | Valve bonnet on plunger of increase strength | |
| RU2364555C1 (en) | Double-acting valve | |
| CN209856131U (en) | Direct-acting overflow valve | |
| CN218671562U (en) | Oiling monitor capable of monitoring intermittent oiling lubrication in real time | |
| CN220319522U (en) | Leakage-proof device for packing box of oil well | |
| CN219282559U (en) | Self-checking formula automatic vent valve | |
| CN215334680U (en) | High-pressure protection overflow valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |