CN114294287A - Buffering overflow valve structure - Google Patents
Buffering overflow valve structure Download PDFInfo
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- CN114294287A CN114294287A CN202111640008.0A CN202111640008A CN114294287A CN 114294287 A CN114294287 A CN 114294287A CN 202111640008 A CN202111640008 A CN 202111640008A CN 114294287 A CN114294287 A CN 114294287A
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Abstract
The invention discloses a buffer overflow valve structure which comprises a valve body, wherein a valve cavity is formed in the valve body, an oil inlet and an oil outlet are formed in the side wall of the valve cavity in a penetrating mode, an adjusting groove is formed in the inner wall of the valve cavity, a valve core is connected to the inner wall of the valve cavity in a sealing and sliding mode, an oil through hole is formed in the side wall of the valve core in a penetrating mode, an oil return hole is formed in the side wall of the oil through hole, an oil return port matched with the oil return hole is formed in the inner wall of the valve cavity in a penetrating mode, a connecting block is fixed to the end portion of the valve core, a sliding block is connected to the connecting block through a main pressure spring and is connected with the inner wall of the adjusting groove in a sealing and sliding mode, and a main adjusting screw is fixed to the end portion of the sliding block. Has the advantages that: when the oil pressure is higher and large-amplitude pressurization still occurs, the oil pressure entering the oil outlet is reduced, so that the oil pressure acceleration in the equipment is reduced, the buffering is realized, and the damage caused by large-amplitude increase under high pressure is avoided.
Description
Technical Field
The invention relates to the technical field of hydraulic overflow valves, in particular to a buffer overflow valve structure.
Background
The overflow valve plays a safety protection role in the hydraulic system, when the pressure of the system exceeds a specified value, the safety valve is jacked open, and a part of oil in the system is discharged into an oil tank, so that the pressure of the system does not exceed an allowable value, and the system is ensured not to have accidents due to overhigh pressure;
when current overflow valve is applied to hydraulic equipment, when the equipment load increases in the twinkling of an eye, when the oil pressure increases at the excessive time, the overflow valve case will receive excessive impact, accomplish pressure uninstallation through the removal of self, and pressure increases in the twinkling of an eye, the rapid movement of case will lead to wearing and tearing aggravation, valve body self can't carry out the buffering of oil pressure, lead to valve body life to reduce, and to increasing the oil pressure suddenly, can't carry out reasonable buffering to the output, lead to equipment pipeline oil pressure to increase at the excessive speed, cause equipment damage easily.
Disclosure of Invention
The invention aims to solve the problem of poor buffering effect in the prior art, and provides a buffering overflow valve structure.
In order to achieve the purpose, the invention adopts the following technical scheme: the buffer overflow valve structure comprises a valve body, wherein a valve cavity is formed in the valve body, an oil inlet and an oil outlet are formed in the side wall of the valve cavity in a penetrating manner, an adjusting groove is formed in the inner wall of the valve cavity, a valve core is connected to the inner wall of the valve cavity in a sealing and sliding manner, an oil through hole is formed in the side wall of the valve core in a penetrating manner, an oil return hole matched with the oil return hole is formed in the side wall of the oil through hole in a penetrating manner, a connecting block is fixed at the end part of the valve core, a sliding block is connected to the connecting block through a main pressure spring and is connected with the inner wall of the adjusting groove in a sealing and sliding manner, a main adjusting screw rod is fixed at the end part of the sliding block and is in threaded connection with the side wall of the valve body, a main rotating handle is fixed at the end part of the main adjusting screw rod, a driving cavity and a recovery groove are formed in the valve body, and a valve buffer mechanism is jointly arranged in the driving cavity and the recovery groove, the pressure reduction cavity and the cut-off cavity are formed in the valve body, and the pressure control mechanism and the cut-off mechanism are respectively arranged in the pressure reduction cavity and the cut-off cavity.
In the above buffer overflow valve structure, the valve buffer mechanism includes a switch-on block connected with the inner wall of the recovery tank in a sealing and sliding manner, the side wall of the switch-on block is provided with an inverted L-shaped switch-on tank, the inner wall of the driving cavity is connected with a push plate in a sealing and sliding manner, the bottom of the push plate is fixed with a connecting rod, the connecting rod penetrates through the side wall of the driving cavity and is fixed with the side wall of the switch-on block, and the push plate and the inner wall of the driving cavity are jointly fixed with a pressure reduction spring.
In the buffer overflow valve structure, the recovery tank is a communicated two-section structure, one section of the recovery tank is communicated with the inside of the valve cavity, the other section of the recovery tank is communicated with the outside of the valve body, electrorheological fluid is filled in the driving cavity, and the connecting block is made of piezoelectric ceramic.
In foretell buffering formula overflow valve structure, accuse pressure mechanism include with the sealed sliding connection's of decompression intracavity wall bearing plate, the lateral wall of bearing plate has the closing plate through vice pressure spring coupling, the lateral wall of closing plate is fixed with vice accent screw rod, vice accent screw rod and valve body lateral wall through thread connection and end fixing have vice turning handle, the lateral wall in decompression chamber is seted up and is run through the oil groove of leading that cuts chamber and the outside switch-on of valve body.
In foretell buffering formula overflow valve structure, the mechanism of cutting is including being fixed in the baffle that cuts the intracavity wall, the tip of baffle is connected with the spacer block through reset spring, the end fixing of spacer block has the push rod, the end fixing of push rod has the roof, roof and spacer block all with cut the sealed sliding connection of the inner wall in chamber, the tip of baffle runs through and has seted up little oilhole and big oilhole, the inside of little oilhole and big oilhole all is equipped with the check valve, the upper portion and the lower part of cutting the chamber are filled electrorheological fluid and hydraulic oil respectively, the closing plate is made by piezoceramics.
Compared with the prior art, the invention has the advantages that:
1. according to the invention, oil in the oil inlet can return to the oil tank through the recovery groove and the connection groove, so that the impact on the valve core when the oil pressure rises can be reduced, the instantaneous movement distance of the valve core due to the oil pressure impact is reduced through the backflow of the oil, the valve core has time to adapt to the increase of the oil pressure, the movement speed of the valve core and the speed of the large-amplitude deformation of the main pressure spring are reduced, the abrasion of the valve core and the damage of the main pressure spring are reduced, the main component of the valve body is buffered, and the service life of the valve body is prolonged;
2. according to the invention, when the oil pressure is high and large-amplitude pressurization still occurs, the oil pressure entering the oil outlet is reduced, so that the oil pressure in the equipment is increased in speed and reduced, the buffer is obtained, and the damage caused by large-amplitude increase under high pressure is avoided;
3. according to the invention, the small oil hole has a small aperture, so that when oil at the lower part of the cutoff cavity moves back, the speed is low, and the oil guide groove can be quickly opened and slowly closed, so that the buffering time is sufficient, and the effect is obvious.
Drawings
FIG. 1 is a schematic structural diagram of a buffer relief valve structure according to the present invention;
FIG. 2 is a side view of a half-section of a structure of a buffer relief valve according to the present invention;
FIG. 3 is a front view, partly in section, of a structure of a buffer relief valve according to the present invention;
FIG. 4 is a schematic structural diagram of a valve core part in a buffer relief valve structure according to the present invention;
FIG. 5 is a schematic structural diagram of a connection block in a buffer relief valve structure according to the present invention;
fig. 6 is a schematic structural diagram of a diaphragm portion in a structure of a buffer relief valve according to the present invention.
In the figure: the hydraulic control valve comprises a valve body 1, a valve cavity 2, an oil inlet 3, an adjusting groove 4, an oil outlet 5, a valve core 6, an oil through hole 7, an oil return hole 8, an oil return port 9, a connecting block 10, a main pressure spring 11, a sliding block 12, a main adjusting screw 13, a main rotating handle 14, a driving cavity 15, a recovery groove 16, a connecting block 17, a connecting through groove 18, a connecting rod 19, a pressure reducing spring 20, a push plate 21, a pressure reducing cavity 22, a bearing plate 23, a secondary pressure spring 24, a sealing plate 25, a secondary adjusting screw 26, a secondary rotating handle 27, an oil guide groove 28, a cut-off cavity 29, a partition plate 30, a return spring 31, a partition block 32, a push rod 33, a top plate 34, a small oil hole 35 and a large oil hole 36.
Detailed Description
The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
Examples
Referring to fig. 1-6, the buffer overflow valve structure comprises a valve body 1, a valve cavity 2 is arranged inside the valve body 1, an oil inlet 3 and an oil outlet 5 are arranged on the side wall of the valve cavity 2 in a penetrating manner, an adjusting groove 4 is arranged on the inner wall of the valve cavity 2, a valve core 6 is connected with the inner wall of the valve cavity 2 in a sealing and sliding manner, the oil inlet 3 and the oil outlet 5 are arranged at two ends of the valve core 6, the oil outlet 5 can be blocked and sealed when the valve core 6 moves to an extreme position, an oil through hole 7 is arranged on the side wall of the valve core 6 in a penetrating manner, an oil return hole 8 is arranged on the side wall of the oil through hole 7, an oil return port 9 matched with the oil return hole 8 is arranged on the inner wall of the valve cavity 2 in a penetrating manner, a connecting block 10 is fixed at the end part of the valve core 6, a sliding block 12 is connected with the inner wall of the adjusting groove 4 in a sealing and sliding manner through a main adjusting screw 13, the main adjusting screw 13 is connected with the side wall of the valve body 1 in a penetrating manner, the end portion of the main adjusting screw 13 is fixed with a main rotating handle 14, a driving cavity 15 and a recovery tank 16 are formed in the valve body 1, a valve buffering mechanism is jointly arranged in the driving cavity 15 and the recovery tank 16, a pressure reducing cavity 22 and a cutting cavity 29 are formed in the valve body 1, and a pressure control mechanism and a cutting mechanism are respectively arranged in the pressure reducing cavity 22 and the cutting cavity 29.
The valve buffer mechanism comprises a switch-on block 17 which is connected with the inner wall of the recovery tank 16 in a sealing and sliding manner, the side wall of the switch-on block 17 is provided with an inverted L-shaped switch-on groove 18, the inner wall of the driving cavity 15 is connected with a push plate 21 in a sealing and sliding manner, the bottom of the push plate 21 is fixed with a connecting rod 19, the connecting rod 19 penetrates through the side wall of the driving cavity 15 and is fixed with the side wall of the switch-on block 17, and the push plate 21 and the inner wall of the driving cavity 15 are jointly fixed with a pressure reduction spring 20; the recovery tank 16 is a two-section structure of intercommunication, and one section is put through with valve cavity 2 inside another section and is put through with valve body 1 outside, and the inside packing of drive chamber 15 has the electrorheological fluid, and connecting block 10 is made by piezoceramics, and when oil slowly increases at oil inlet 3, connecting block 10 will not produce the electric power value of the full amount because of the pressure boost in the twinkling of an eye, thereby makes the action of putting through block 17 can not move, thereby makes the action of lasting oil return can not appear in normal pressure boost process, guarantees that the pressure boost effectively goes on.
Accuse pressure mechanism include with the sealed sliding connection's of decompression chamber 22 inner wall bearing plate 23, the lateral wall of bearing plate 23 is connected with the closing plate 25 through vice pressure spring 24, the lateral wall of closing plate 25 is fixed with vice adjusting screw 26, vice adjusting screw 26 and the valve body 1 lateral wall through threaded connection and end fixing have vice turning handle 27, the lateral wall of decompression chamber 22 is seted up and is run through the oil groove 28 that leads of cutting chamber 29 and the outside switch-on of valve body 1, through adjusting vice adjusting screw 26 and deepening the inside length of decompression chamber 22, can adjust vice pressure spring 24's pressure, thereby control the threshold value of buffer unit oil pressure, when satisfying equipment normal use, avoid the damage that high pressure boost leads to.
The cutting mechanism comprises a partition plate 30 fixed on the inner wall of the cutting cavity 29, the end part of the partition plate 30 is connected with a spacer block 32 through a return spring 31, the end part of the spacer block 32 is fixed with a push rod 33, the end part of the push rod 33 is fixed with a top plate 34, the top plate 34 and the spacer block 32 are in sealing sliding connection with the inner wall of the cutting cavity 29, the end part of the partition plate 30 is provided with a small oil hole 35 and a large oil hole 36 in a penetrating way, the small oil hole 35 and the large oil hole 36 are both internally provided with a one-way valve with starting pressure, the upper part and the lower part of the cutting cavity 29 are respectively filled with electrorheological fluid and hydraulic oil, the hydraulic oil can not pass through the small oil hole 35 and the large oil hole 36 under the self gravity action, when the spacer block 32 starts to move, the oil passes through the large oil hole 36 and can be rapidly transferred, when the spacer block 32 is reset, the oil passes through the small oil hole 35, the oil transfer speed is slow, the reset speed of the spacer block 32 is slow, the seal plate 25 is made of piezoelectric ceramics, when the piezoelectric ceramic is extruded by instantaneous high pressure, instantaneous high-voltage power can be generated, the instantaneous high-voltage power is supplied to the electrorheological fluid, the electrorheological fluid is solidified instantaneously, then the liquefied state is recovered, the solidification process of the electrorheological fluid is accompanied with obvious volume expansion, and the component can be pushed to move by utilizing the volume change.
In the invention, when the valve is used, oil enters the valve body 1 from the oil inlet 3, passes through the oil through hole 7, enters the valve cavity 2, and is discharged from the oil outlet 5, so that the smooth supply of the oil is ensured, the pushing of the slide block 12 can be realized by rotating the main adjusting screw 13, so that the main pressure spring 11 is contracted, the extrusion force applied to the valve core 6 is adjusted, and the valve trigger pressure is adjusted;
when instant high-pressure oil occurs, the oil pressure in the oil inlet 3 is increased steeply, the valve core 6 is impacted to move, the main pressure spring 11 is caused to contract instantly to increase the pressure, the pressure on the connecting block 10 is caused to increase instantly, instant high-voltage electric power is generated, after the electric rheological fluid in the driving cavity 15 is supplied, the electric rheological fluid is solidified and collided, the push plate 21 is further pushed to move, the connecting block 17 is caused to move, the connecting groove 18 is further caused to connect the two sections of the recovery grooves 16, the oil in the oil inlet 3 can return to the oil tank through the recovery grooves 16 and the connecting grooves 18, the impact on the oil pressure raising valve core 6 can be reduced, the instant moving distance of the valve core 6 due to the oil pressure impact is reduced through the backflow of the oil, the valve core 6 has time to adapt to the increase of the oil pressure, and the moving speed of the valve core 6 and the large deformation speed of the main pressure spring 11 are reduced, thereby reducing the abrasion of the valve core 6 and the damage of the main pressure spring 11, buffering the main component of the valve body 1 and further prolonging the service life of the valve body 1;
when the oil pressure entering the oil inlet 3 is too high, the valve core 6 is continuously pushed to move, so that the oil outlet 5 is blocked by the valve core 6, the oil return hole 8 is communicated with the oil return port 9, the oil directly returns to the oil tank from the oil return port 9, the excessive pressure oil is prevented from entering the equipment, and the use safety of the equipment is ensured;
when the oil pressure is normally increased, the pressure of the oil pressure does not reach the oil return pressure, but the oil pressure passing through the valve body 1 is increased, when the oil pressure is large and still increases sharply, the pressure bearing plate 23 is pushed by the oil pressure to compress the secondary pressure spring 24 instantly and greatly, so that the pressure bearing plate 23 moves and yields sufficiently, the oil can enter the oil guide groove 28, because the instant moving amount of the pressure bearing plate 23 is large, the pressure bearing by the sealing plate 25 is increased instantly, and the instant high voltage supply is generated, so that the electrorheological fluid in the cutoff cavity 29 is solidified and expanded, the top plate 34 is pushed to move, the spacer block 32 is displaced, the return spring 31 is contracted, the spacer block 32 does not obstruct the oil guide groove 28 any more, the oil in the valve cavity 2 can return to the oil tank through the oil guide groove 28, and when the oil pressure is high and the oil pressure is still greatly increased, the oil pressure entering the oil outlet 5 can be reduced, therefore, the oil pressure in the equipment is increased and reduced, the buffer is obtained, and the damage caused by large increase under high pressure is avoided;
and the electrorheological fluid can be liquefied automatically in the subsequent process, so that the spacer block 32 is reset under the elastic force action of the reset spring 31, the oil pressure of the oil supply of the equipment can reach a required value, the use of the equipment is not influenced, and the speed is low when the oil on the lower part of the cut-off cavity 29 moves back because the aperture of the small oil hole 35 is small, so that the oil guide groove 28 can be opened quickly and closed slowly, the buffering time is sufficient, and the effect is obvious.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The buffer overflow valve structure comprises a valve body (1) and is characterized in that a valve cavity (2) is formed in the valve body (1), an oil inlet (3) and an oil outlet (5) are formed in the side wall of the valve cavity (2) in a penetrating mode, an adjusting groove (4) is formed in the inner wall of the valve cavity (2), a valve core (6) is connected to the inner wall of the valve cavity (2) in a sealing and sliding mode, an oil through hole (7) is formed in the side wall of the valve core (6) in a penetrating mode, an oil return hole (8) is formed in the side wall of the oil through hole (7), an oil return port (9) matched with the oil return hole (8) is formed in the inner wall of the valve cavity (2) in a penetrating mode, a connecting block (10) is fixed to the end portion of the valve core (6), the connecting block (10) is connected with a sliding block (12) through a main pressure spring (11), and the sliding block (12) is connected with the inner wall of the adjusting groove (4) in a sealing mode, the end fixing of slider (12) has major key screw rod (13), major key screw rod (13) and valve body (1) lateral wall run through threaded connection, the end fixing of major key screw rod (13) has main turning handle (14), driving chamber (15) and accumulator (16) have been seted up to the inside of valve body (1), driving chamber (15) and accumulator (16) inside are provided with valve buffer gear jointly, decompression chamber (22) and cut chamber (29) have been seted up to the inside of valve body (1), decompression chamber (22) and the inside of cutting chamber (29) are equipped with accuse pressure mechanism and cut off the mechanism respectively.
2. The buffering overflow valve structure according to claim 1, wherein the valve buffering mechanism comprises a connection block (17) in sealed sliding connection with the inner wall of the recovery tank (16), the side wall of the connection block (17) is provided with an inverted L-shaped connection groove (18), the inner wall of the driving cavity (15) is in sealed sliding connection with a push plate (21), the bottom of the push plate (21) is fixed with a connecting rod (19), the connecting rod (19) penetrates through the side wall of the driving cavity (15) and is fixed with the side wall of the connection block (17), and the push plate (21) and the inner wall of the driving cavity (15) are jointly fixed with a pressure reduction spring (20).
3. The buffer overflow valve structure according to claim 2, wherein the recovery tank (16) is a two-section structure, one section is communicated with the inside of the valve cavity (2), the other section is communicated with the outside of the valve body (1), the inside of the driving cavity (15) is filled with electrorheological fluid, and the connecting block (10) is made of piezoelectric ceramics.
4. The buffering overflow valve structure according to claim 1, wherein the pressure control mechanism comprises a pressure bearing plate (23) in sealed sliding connection with the inner wall of the pressure reduction cavity (22), the side wall of the pressure bearing plate (23) is connected with a sealing plate (25) through an auxiliary pressure spring (24), the side wall of the sealing plate (25) is fixed with an auxiliary adjusting screw (26), the auxiliary adjusting screw (26) is in threaded connection with the side wall of the valve body (1) in a penetrating manner and the end of the auxiliary adjusting screw is fixed with an auxiliary rotating handle (27), and the side wall of the pressure reduction cavity (22) is provided with an oil guide groove (28) which penetrates through the cut-off cavity (29) and is communicated with the outside of the valve body (1).
5. The buffer overflow valve structure according to claim 4, wherein the cutoff mechanism comprises a partition plate (30) fixed on the inner wall of the cutoff cavity (29), the end of the partition plate (30) is connected with a spacer block (32) through a return spring (31), the end of the spacer block (32) is fixed with a push rod (33), the end of the push rod (33) is fixed with a top plate (34), the top plate (34) and the spacer block (32) are both in sealed sliding connection with the inner wall of the cutoff cavity (29), the end of the partition plate (30) is provided with a small oil hole (35) and a large oil hole (36) in a penetrating manner, check valves are arranged inside the small oil hole (35) and the large oil hole (36), the upper portion and the lower portion of the cutoff cavity (29) are respectively filled with electrorheological fluid and hydraulic oil, and the sealing plate (25) is made of piezoelectric ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111640008.0A CN114294287B (en) | 2021-12-30 | 2021-12-30 | Buffering overflow valve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111640008.0A CN114294287B (en) | 2021-12-30 | 2021-12-30 | Buffering overflow valve structure |
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| Publication Number | Publication Date |
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| CN114294287A true CN114294287A (en) | 2022-04-08 |
| CN114294287B CN114294287B (en) | 2023-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111640008.0A Active CN114294287B (en) | 2021-12-30 | 2021-12-30 | Buffering overflow valve structure |
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| Country | Link |
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| CN (1) | CN114294287B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704687A (en) * | 2022-04-28 | 2022-07-05 | 靖江市新博液压件有限公司 | Overflow valve mechanism with self-cleaning function |
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| CN114704687A (en) * | 2022-04-28 | 2022-07-05 | 靖江市新博液压件有限公司 | Overflow valve mechanism with self-cleaning function |
| CN114704687B (en) * | 2022-04-28 | 2023-09-19 | 靖江市新博液压件有限公司 | Overflow valve mechanism with self-cleaning function |
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|---|---|
| CN114294287B (en) | 2023-01-03 |
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Effective date of registration: 20221124 Address after: 214500 No.9 Xiexin Road, Xieqiao Town, Jingjiang City, Taizhou City, Jiangsu Province Applicant after: JIANGSU ERMA FLUID POWER ELEMENT CO.,LTD. Address before: 214500 Huaqiao road 18, Da Jue Industrial Zone, Jingjiang, Taizhou, Jiangsu Applicant before: Jingjiang dome Security Engineering Co.,Ltd. |
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