CN216407327U - Overflow valve is opened to second grade - Google Patents
Overflow valve is opened to second grade Download PDFInfo
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- CN216407327U CN216407327U CN202122542134.4U CN202122542134U CN216407327U CN 216407327 U CN216407327 U CN 216407327U CN 202122542134 U CN202122542134 U CN 202122542134U CN 216407327 U CN216407327 U CN 216407327U
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Abstract
The utility model relates to the technical field of high-pressure common rail fuel injection systems, in particular to a two-stage opening overflow valve. The technical scheme adopted by the utility model is as follows: including the valve body structure, the inside of valve body structure is equipped with overflow control main cavity, the internally mounted of overflow control main cavity has the case, the case can move about the inside of overflow control main cavity, the bottom of case and valve body structure's lower terminal surface valve body top is on the coplanar when the case moves about to the lower extreme position, the left side position of overflow control main cavity is cylindrical steel ball cooperation mounting groove, the right side of overflow control main cavity is cylindrical first overflow control cavity and second overflow control cavity. The utility model has the advantages that: the flow stability that can compromise the little flow section can control the pressure oscillation of large-traffic section again, and the flexibility when using is stronger, and the whole life-span when using is longer, and the security level in the use is higher, can reduce the maintenance frequency and the cost in the use.
Description
Technical Field
The utility model relates to the technical field of high-pressure common rail fuel injection systems, in particular to a two-stage opening overflow valve.
Background
The overflow valve is a hydraulic pressure control valve, and mainly plays the roles of constant pressure, overflow, pressure stabilization, system unloading and safety protection in hydraulic equipment. The single-stage opening overflow valve generally applied to a liquid path with large flow change hardly ensures the stability of the pressure before the valve, and the fluctuation of the pressure before the valve can be caused along with the increase of the flow, thereby influencing the oil supply efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a two-stage opening overflow valve which adopts a brand new structural design, has wider application range when in use, the high-pressure common rail fuel supply pump has the advantages of not only taking into account the flow stability of the small flow section, but also controlling the pressure fluctuation of the large flow section, having stronger flexibility when in use, being capable of carrying out safe and stable exhaust operation when a volume cavity in front of an overflow valve needs to exhaust in special occasions, having more concise integral structure, higher safety when in use, stronger durability, being capable of improving the sensitivity of impurities and ensuring the leakage amount, ensuring that the high-pressure common rail fuel supply pump supplies fuel to the common rail at the low speed with the maximum efficiency, meeting the requirement of a high-pressure common rail fuel system and further achieving the requirement of low-speed starting, the service life of the whole machine is longer when the machine is used, the safety level is higher when the machine is used, and the maintenance frequency and the cost in the use process can be reduced.
The technical scheme of the utility model is as follows:
the utility model provides a two-stage opening overflow valve which characterized in that: the overflow control valve comprises a valve body structure, an overflow control main chamber is arranged in the valve body structure, a valve core is arranged in the overflow control main chamber, the valve core can move up and down in the overflow control main chamber, when the valve core moves to a lower end position, the bottom of the valve core and the top end of a lower end face valve body of the valve body structure are on the same plane, the left side of the overflow control main chamber is a cylindrical steel ball matching mounting groove, the right side of the overflow control main chamber is a cylindrical first overflow control chamber and a cylindrical second overflow control chamber, the right side of the second overflow control chamber completely penetrates through the end face of the outer side of the top end of the valve body, the diameters of the steel ball matching mounting groove, the first overflow control chamber and the second overflow control chamber are sequentially reduced, and the connecting position of the first overflow control chamber and the second overflow control chamber is provided with a conical overflow closed sealing groove, a cylindrical first sealing and matching installation groove is formed in one side, close to the top end of the valve body, of the outer side of the valve body structure, the diameter of the middle position of the outer side of the valve body structure is larger than the diameter of the position, close to one side of the top end of the valve body, a main body matching external thread is arranged in the middle position of the outer side of the valve body structure, a cylindrical first matching position groove is formed in one side, away from the top end of the valve body, of the main body matching external thread, a cylindrical second sealing and matching installation groove is formed in the position, away from the top end of the valve body, of the outer side of the valve body structure, two cylindrical primary overflow holes which are symmetrically distributed are formed in the outer cylindrical surface of the first matching position groove and communicated with the first overflow control chamber, cylindrical secondary overflow holes which are uniformly distributed in the circumference and completely penetrate through the outer side of the valve body structure are formed in the second overflow control chamber, the outer part of the valve body structure is provided with an integrally formed hexagonal fastening matching column at one side of the second sealing matching mounting groove far away from the top end of the valve body, a cylindrical steel ball is pressed into the steel ball matching mounting groove in an interference fit manner, the steel ball presses the valve core into the overflow control main cavity chamber through a spring, an integrally formed conical valve core tapered spigot is arranged on the cylindrical surface at the outer side of the valve core, the top end surface of the valve core and the top end of the valve body can move to the same plane, a cylindrical overflow main body matching connection hole is arranged at the central position of the top end surface, two primary overflow matching holes which are uniformly distributed in the circumference and completely penetrate through the outer end surface of the valve core are arranged in the overflow main body matching connection hole, and an integrally formed cylindrical fastening combination stabilizing column is arranged at one side of the valve core far away from the top end surface, the fastening combination stabilizing column and the spring are sleeved together, and a circular first sealing ring and a circular second sealing ring with cylindrical sections are respectively installed in the second sealing fit installation groove and the first sealing fit installation groove.
Further, the secondary overflow hole is positioned at the central position of the second overflow control chamber in the length direction.
Furthermore, a stable combined clamping anti-loosening groove with a right-angled trapezoid cross section is arranged at the connecting position of the fastening combined stable column and the valve core.
Furthermore, the outer edge position of the steel ball matching installation groove is provided with an installation guide matching smooth arc.
The utility model has the beneficial effects that:
1. the utility model adopts a brand-new structure design, has wider application range when in use, can not only give consideration to the flow stability of a small flow section, but also control the pressure fluctuation of a large flow section, and has stronger flexibility when in use.
2. The volume chamber before the overflow valve of special occasion carries out safety and stability's exhaust operation when having the demand that needs exhaust, and holistic structure is more succinct, and the security during the use is higher, and the durability is stronger.
3. The high-pressure common rail fuel supply pump can improve the sensitivity of impurities and ensure the leakage amount, the high-pressure common rail fuel supply pump can supply fuel to the common rail at the low speed with the maximum efficiency, the requirement of a high-pressure common rail fuel system is met, and the requirement of low-speed starting is further met.
4. The service life of the whole machine is longer when the machine is used, the safety level is higher when the machine is used, and the maintenance frequency and the cost in the use process can be reduced.
Drawings
FIG. 1 is a schematic view of a pressure-flow curve according to the present invention;
FIG. 2 is an overall cross-sectional view of the present invention;
FIG. 3 is a schematic sectional view of the valve body structure of the present invention;
FIG. 4 is a schematic cross-sectional view of a cartridge of the present invention;
in the figure: 1. the steel ball, 2, first sealing washer, 3, a spring, 4, the valve body structure, 5, the case, 6, the second sealing washer, 41, first sealed cooperation mounting groove, 42, the sealed cooperation mounting groove of second, 43, the second grade overflow hole, 44, the one-level overflow hole, 45, main part cooperation external screw thread, 46, hexagonal fastening cooperation post, 47, the closed seal groove of connecting of overflow, 48, steel ball cooperation mounting groove, 49, the valve body top, 51, the one-level overflow cooperation hole, 52, the stable post of fastening combination, 53, the terminal surface of the top, 54, case tapered spigot.
Detailed Description
As shown in figures 1 to 4, the two-stage opening overflow valve adopts a brand new structural design, has wider application range when in use, the high-pressure common rail fuel supply pump has the advantages of not only taking into account the flow stability of the small flow section, but also controlling the pressure fluctuation of the large flow section, having stronger flexibility when in use, being capable of carrying out safe and stable exhaust operation when a volume cavity in front of an overflow valve needs to exhaust in special occasions, having more concise integral structure, higher safety when in use, stronger durability, being capable of improving the sensitivity of impurities and ensuring the leakage amount, ensuring that the high-pressure common rail fuel supply pump supplies fuel to the common rail at the low speed with the maximum efficiency, meeting the requirement of a high-pressure common rail fuel system and further achieving the requirement of low-speed starting, the service life of the whole machine is longer when the machine is used, the safety level is higher when the machine is used, and the maintenance frequency and the cost in the use process can be reduced. It includes valve body structure 4, valve body structure 4's inside is equipped with the overflow control main cavity, the internally mounted of overflow control main cavity has case 5, case 5 is in the activity from top to bottom can be carried out in the inside of overflow control main cavity, when case 5 moves to lower extreme position case 5's bottom with valve body structure 4's lower terminal surface valve body top 49 is on the coplanar, the left side position of overflow control main cavity is cylindrical steel ball cooperation mounting groove 48, the right side of overflow control main cavity is cylindrical first overflow control chamber and second overflow control chamber, the right side of second overflow control chamber will the outside terminal surface of valve body top 49 runs through completely, steel ball cooperation mounting groove 48 first overflow control chamber with the diameter of second overflow control chamber reduces in proper order, first overflow control chamber with the hookup location of second overflow control chamber is equipped with conical overflow closed connection Seal groove 47, one side of the outside of valve body structure 4 close to valve body top end 49 is equipped with cylindrical first sealed cooperation mounting groove 41, the diameter of the outside intermediate position of valve body structure 4 is greater than the diameter of being close to valve body top end 49 one side position, the outside intermediate position of valve body structure 4 is equipped with main part cooperation external screw thread 45, one side that valve body top end 49 was kept away from to main part cooperation external screw thread 45 is equipped with cylindrical first cooperation position groove, the outside of valve body structure 4 is located one side position that valve body top end 49 was kept away from in first cooperation position groove is equipped with cylindrical second sealed cooperation mounting groove 42, be equipped with two symmetric distributions on the outer face of cylinder in first cooperation position groove and with the communicating cylindrical one-level overflow hole 44 of first overflow control chamber, the inside of second overflow control chamber is equipped with circumference evenly distributed and with the cylindrical second level overflow hole 43 that completely runs through in the outside of valve body structure 4, an integrally formed hexagonal fastening matching column 46 is arranged at one side of the outer part of the valve body structure 4, which is away from the top end 49 of the valve body, of the second sealing matching installation groove 42, a cylindrical steel ball 1 is pressed into the steel ball matching installation groove 48 in an interference fit manner, the steel ball 1 presses the valve core 5 into the overflow control main chamber through a spring 3, an integrally formed conical valve core tapered spigot 54 is arranged on the outer side cylindrical surface of the valve core 5, the top end surface 53 of the valve core 5 and the top end 49 of the valve body can move to the same plane, a cylindrical overflow main body matching connection hole is arranged at the center of the top end surface 53, two primary overflow matching holes 51 which are uniformly distributed in the circumference and completely penetrate through the outer end surface of the valve core 5 are arranged in the overflow main body matching connection hole, an integrally formed cylindrical fastening combination stabilizing column 52 is arranged at one side of the valve core 5, which is away from the top end surface 53, the fastening combination stabilizing column 52 is sleeved with the spring 3, and the second sealing fit installation groove 42 and the first sealing fit installation groove 41 are internally provided with a circular first sealing ring 2 and a circular second sealing ring 6 which are cylindrical in section respectively. When the valve works, when the liquid pressure begins to rise, and the hydraulic force generated by the pressure difference between the front and the back of the valve is larger than the spring force, the valve core 5 moves backwards, when the first-level overflow hole 44 is reached and the valve runs to the opening position, the first-level flow is generated, and the liquid flows into the valve body structure 4 through the first-level overflow hole 44 on the valve core and then flows out through the first-level overflow hole 44 on the valve body; the pressure difference between the front and the back of the valve is continuously increased, the hydraulic force is increased, the valve core 5 continuously moves backwards, the secondary overflow hole 43 is opened, the secondary flow is generated, and the liquid overflows through the secondary flow hole 43 at the front end of the valve body; when the front and back pressure of the valve core and the spring force reach balance, the valve core 5 operates to a specific position, the front pressure of the valve core and the overflow amount reach a specific stable one-to-one corresponding relation, and a detailed pressure flow curve is shown in figure 1, so that the controllability of the front pressure of the valve can be realized in the process from low flow to high flow. When pressure is relieved, the liquid pressure is gradually reduced, the elastic force of the spring is greater than the front pressure of the valve core, the valve core 5 moves forwards, the valve core 5 closes the secondary overflow hole 43 of the valve body, and the secondary flow rate disappears firstly; the pressure before the valve is continuously reduced, the valve core 5 continuously moves forwards, the primary overflow hole 41 is closed, and the primary flow rate disappears; the hydraulic pressure is continuously reduced, and when the pressure before the valve is smaller than the pretightening force of the spring, the valve body overflows and is connected with the sealing groove 47 in a closed mode to abut against the conical spigot 54 of the valve core, so that the valve core 5 cannot move forwards continuously.
Preferably, the secondary overflow hole 43 is located at the central position of the second overflow control chamber in the length direction, so that the service life of the structure can be maximized in use, and the stability in use is more reliable.
Preferably, a stable combination clamping anti-loosening groove with a right-angled trapezoid cross section is formed at the connection position of the fastening combination stabilizing column 52 and the valve core 5, so that the combination stability when the stable combination clamping anti-loosening groove is matched with a spring is ensured to be better, and the structural stability when the stable combination clamping anti-loosening groove is used can be further improved.
Preferably, the outer edge of the steel ball fitting mounting groove 48 is provided with a smooth mounting guide fitting arc, so that the smoothness during fitting is ensured to be better, and the assembly operation during production is easier.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications or substitutions can be made without departing from the principle of the present invention, and these modifications or substitutions should also be considered as the protection scope of the present invention.
Claims (4)
1. The utility model provides a two-stage opening overflow valve which characterized in that: the overflow control valve comprises a valve body structure (4), an overflow control main chamber is arranged in the valve body structure (4), a valve core (5) is arranged in the overflow control main chamber, the valve core (5) can move up and down in the overflow control main chamber, when the valve core (5) moves to a lower end position, the bottom of the valve core (5) and the lower end face valve body top end (49) of the valve body structure (4) are on the same plane, the left side of the overflow control main chamber is a cylindrical steel ball matching installation groove (48), the right side of the overflow control main chamber is a cylindrical first overflow control chamber and a cylindrical second overflow control chamber, the right side of the second overflow control chamber completely penetrates through the outer end face of the valve body top end (49), and the diameters of the steel ball matching installation groove (48), the first overflow control chamber and the second overflow control chamber are reduced in sequence, first overflow control cavity with the hookup location of second overflow control cavity is equipped with closed connection seal groove of conical overflow (47), the outside of valve body structure (4) is close to one side of valve body top (49) is equipped with cylindrical first sealed cooperation mounting groove (41), the diameter of the outside intermediate position of valve body structure (4) is greater than and is close to the diameter of valve body top (49) one side position, the outside intermediate position of valve body structure (4) is equipped with main part cooperation external screw thread (45), keep away from main part cooperation external screw thread (45) one side of valve body top (49) is equipped with cylindrical first cooperation position groove, the outside of valve body structure (4) is located first cooperation position groove is kept away from one side position of valve body top (49) is equipped with cylindrical second sealed cooperation mounting groove (42), be equipped with on the outer face of cylinder of first cooperation position groove two symmetric distributions and with first overflow control cavity is mutually located A cylindrical primary overflow hole (44) is communicated with the second overflow control chamber, a cylindrical secondary overflow hole (43) which is uniformly distributed in the second overflow control chamber in a circumferential manner and completely penetrates through the outer side of the valve body structure (4) is arranged in the second overflow control chamber, an integrally formed hexagonal fastening matching column (46) is arranged at one side of the second sealing matching installation groove (42) far away from the top end (49) of the valve body, a cylindrical steel ball (1) is pressed in the steel ball matching installation groove (48) in an interference fit manner, the steel ball (1) presses the valve core (5) into the overflow control main chamber through a spring (3), an integrally formed conical valve core tapered spigot (54) is arranged on the cylindrical surface of the outer side of the valve core (5), and the top end surface (53) of the valve core (5) and the top end (49) of the valve body can move to the same plane, the center position of top end face (53) puts and is equipped with cylindrical overflow main part cooperation connecting hole, the inside of overflow main part cooperation connecting hole is equipped with two circumference evenly distributed and will one-level overflow mating holes (51) that the outside terminal surface of case (5) run through completely, keeping away from of case (5) one side of top end face (53) is equipped with integrated into one piece's cylindrical fastening combination stabilization post (52), fastening combination stabilization post (52) with spring (3) registrate is installed together, sealed cooperation mounting groove (42) of second with install circular first sealing washer (2) and second sealing washer (6) that the cross-section is columniform in first sealed cooperation mounting groove (41) respectively.
2. The two-stage opening overflow valve of claim 1, wherein: the secondary overflow hole (43) is positioned at the central position of the second overflow control chamber in the length direction.
3. The two-stage opening overflow valve of claim 1, wherein: and a stable combined clamping anti-loosening groove with a right-angled trapezoid cross section is arranged at the connecting position of the fastening combined stable column (52) and the valve core (5).
4. The two-stage opening overflow valve of claim 1, wherein: and the outer edge of the steel ball matching mounting groove (48) is provided with a smooth arc for mounting and guiding matching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122542134.4U CN216407327U (en) | 2021-10-21 | 2021-10-21 | Overflow valve is opened to second grade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122542134.4U CN216407327U (en) | 2021-10-21 | 2021-10-21 | Overflow valve is opened to second grade |
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| Publication Number | Publication Date |
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| CN216407327U true CN216407327U (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122542134.4U Active CN216407327U (en) | 2021-10-21 | 2021-10-21 | Overflow valve is opened to second grade |
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| CN (1) | CN216407327U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116181539A (en) * | 2023-02-08 | 2023-05-30 | 钧风电控科技(泰州)有限责任公司 | Two-stage opening overflow valve |
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2021
- 2021-10-21 CN CN202122542134.4U patent/CN216407327U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116181539A (en) * | 2023-02-08 | 2023-05-30 | 钧风电控科技(泰州)有限责任公司 | Two-stage opening overflow valve |
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